Guest editorial, special issue on new food processing technologies and food safety

USDA-ARS?s Scientific Manuscript database

The microflora of foods is very significant to food producers, processors and consumers and the food manufacturers including distributors are responding to consumers’ demand for food products that are safe, fresher and convenient for use. In some cases foods may be improperly processed and/or contam...

Guest Editorial

DOE PAGES

Deline, Christopher A; van Sark, Wilfried; Georghiou, George E.

2017-08-16

This Special Issue entitled 'Performance Assessment and Condition Monitoring of Photovoltaic Systems for Improved Energy Yield', contains ten papers that discuss various aspects in performance assessment, thus bringing the reader up to date with the present state-of-the-art technologies. In particular, the following topics are addressed: system performance monitoring; operational analysis and design; solar forecasting.

Finding the Path

PubMed Central

McGrath, Kathy

2007-01-01

In this guest editorial, the challenges and pain of childbirth are presented as essential components of important life transitions. The role of pain in childbirth is explored. Childbirth is discussed as a “flow experience,” and recommendations for assisting women to meet the challenges of labor and birth are presented. PMID:18311333

Ecological Perspectives on Emotional Disturbance. Journal within a Journal.

ERIC Educational Resources Information Center

Chrystal, Charles A., Ed.; And Others

1988-01-01

The articles included in this special journal supplement represent a view of special education which is concerned with the adjustment of the emotionally disturbed learner within varied social-interactional frameworks or settings, as noted in the guest editorial by Charles Chrystal. "Beyond Therapy and Research: Helping Emotionally Troubled…

CALS Tech Bulletin #3. An Occasional Publication of the Center for Advanced Learning Systems.

ERIC Educational Resources Information Center

CSR, Inc., Washington, DC.

This paper contains brief synopses of recent technical progress/projects in the field of advanced learning systems. This issue contains the following 12 items: (1) "Guest Editorial" (Sylvia Charp) concerning the need to provide better learning experiences for all students; (2) "Steps in Developing an Expert Systems Model," as…

Education, Democratization, and Globalization: A Challenge for Comparative Education. Guest Editorial Essay and Presidential Address.

ERIC Educational Resources Information Center

McGinn, Noel F.

1996-01-01

Comparative education can contribute to democratization by addressing four issues: declining democratic practice and civic participation in the industrialized world, reasons why education does not resolve this problem, impact of economic globalization on education and on democratization, and the urgency for comparative research on cultural…

Guest Editorial. How Do We Deal with Aggression and Violence in Schools?

ERIC Educational Resources Information Center

Rutherford, Robert B., Jr.

2000-01-01

Aggressive and violent behaviors are increasing among today's students. Some children maintain consistently high levels of aggressiveness that affect them academically and socially. Abundant technology exists for assessment and intervention, and it should be used on a schoolwide basis as part of early intervention. The paper describes two types of…

Guest Editorial: The Exploitation of the Black Athlete: Some Alternative Solutions.

ERIC Educational Resources Information Center

Sailes, Gary A.

1986-01-01

At the cost of losing the chance to develop nonathletic marketable skills, Black athletes allow themselves to be exploited in the hopes of gaining stardom and wealth. Mass media, sports heroes, and peer pressure can help athletes channel their field talent into the classroom. Some successful high school programs are described. (PS)

The Case for Pedagogical Action Research in Psychology Learning and Teaching

ERIC Educational Resources Information Center

Norton, Lin

2014-01-01

It is just over 12 years since "Psychology Teaching Review"'s first Special Issue on action research psychology. In the guest editorial for that issue Lin Norton suggested that pedagogical action research can be controversial, and that for some academic psychologists it appears to be more than curriculum development rather than…

Club health: global perspectives, new directions.

PubMed

Measham, Fiona; Anderson, Tammy; Hadfield, Phil

2009-01-01

This editorial presents the views of the guest editors of this collection in summarising some of the general themes arising from a selection of papers presented at the 2008 Club Health Conference in Ibiza, Spain. Particular emphasis is placed upon the value of comparative approaches to club studies, youth culture and substance use so that researchers, policy-makers, and practitioners can gain new understanding of the interplay of local and global factors which shape club cultures, nightlife scenes, and individual lifestyles. By contextualizing the studies in this volume, the editorial outlines important themes and issues which will help promote Club Studies as an interdisciplinary field of endeavour well into the future.

The Number of Hardwood Sawmills Continues to Decrease - Is that Bad?

Treesearch

William G. Luppold; William G. Luppold

2005-01-01

The following Guest Editorial, "The Number of Hardwood Sawmills Continues to Decrease - Is that Bad?" is presented by William G. Luppold, Ph.D., of the USDA Forest Service Northeastern Research Station - Forestry Sciences Laboratory. In this article, Dr. Luppold examines many of the key issues surrounding the size and loss of sawmills, which has influenced...

Guest editorial. Integrated healthcare information systems.

PubMed

Li, Ling; Ge, Ri-Li; Zhou, Shang-Ming; Valerdi, Ricardo

2012-07-01

The use of integrated information systems for healthcare has been started more than a decade ago. In recent years, rapid advances in information integration methods have spurred tremendous growth in the use of integrated information systems in healthcare delivery. Various techniques have been used for probing such integrated systems. These techniques include service-oriented architecture (SOA), EAI, workflow management, grid computing, and others. Many applications require a combination of these techniques, which gives rise to the emergence of enterprise systems in healthcare. Development of the techniques originated from different disciplines has the potential to significantly improve the performance of enterprise systems in healthcare. This editorial paper briefly introduces the enterprise systems in the perspective of healthcare informatics.

Meet the APJON Editorial Board

PubMed Central

2016-01-01

The following oncology nurses, nurse practitioners, educators, administrators, and other healthcare providers comprise the Editorial Board of the Asia-Pacific Journal of Oncology Nursing (APJON) for 2016. They are involved in cancer care and support APJON's mission to provide a platform for oncology nurses from Asia-Pacific region to share information in all field of oncology nursing from prevention to palliative care. Since 2015, there has been a special topic in each issue, with the topic editor soliciting articles reading all the submitted articles and serving as guest editor for that issue of the journal. We welcome your comments, ideas, and suggestions for special topics. Contact information can be found at the end of each description.

EDITORIAL: Editorial from the new Editor-in-Chief for 2014 Editorial from the new Editor-in-Chief for 2014

NASA Astrophysics Data System (ADS)

Graham, W. G.

2014-02-01

I am honoured to take on the leadership of Plasma Sources Science and Technology (PSST) as the successor to Professor Mark J Kushner, with whom I have had the pleasure to work on the journal for many years. Under Mark's insightful and energetic leadership over the last six years, PSST has cemented its position as the journal of choice within its subject area and is now one of the most successful journals in the field. In this first issue of 2014, I would like to reflect on some of the events and achievements of 2013. At the start of the year the PSST Editorial Board, recognizing the vital importance of atomic, molecular and optical (AMO) data to low-temperature plasma physics, agreed that PSST would accept papers reporting such new data, generated through both experiment and theory. Jonathan Tennyson joined the Editorial Board to represent this area. In March Anne Bourdon joined the Associate Editor team and has since then played a key part in the journal's review process alongside our other Editors. During the autumn, PSST moved to a new editorial management system. In December Deborah O'Connell was awarded the 2013 Hershkowitz Early Career Award and Review and joins the Editorial Board as of 2014. I would also like to thank Miles Turner for his work in leading the drafting of a guide on the details necessary in the reporting of the results of computer simulations; the main conclusions of this report have been incorporated into the journal policy. Overall 2013 has been another successful year for PSST; paper submissions were up by 8% on the previous year and there was the highest ever number of downloads of PSST papers in one year. Another noteworthy feature of 2013 was the continuing improvement in publication times while maintaining our high standards for acceptance and providing expert feedback coupled with encouragement particularly to younger researchers and groups. Largely as a result of the hard work of our referees and Associate Editors, the average time from receipt-to-first decision of a paper is only 50 days. In 2014 we will continue to support the low-temperature plasma physics community through the publication of special topical issues. Those already scheduled for next year are: Transport in B-fields in low temperature plasmas, Guest Editors: Rod Boswell and Igor D Kaganovich Spots and patterns on electrodes of gas discharges, Guest Editors: Mikhail S Benilov and Ulrich Kogelschatz Interaction of electromagnetic waves with low temperature plasmas, Guest Editors: Osamu Sakai and Shahid Rauf We will also launch a new feature: LabTalks, a way in which our authors can showcase their group's work and communicate their research published in PSST to a wider audience. Full details are on the PSST website. Along with the leadership team, made up of Associate Editors, Anne, Nick and Richard and the great PSST staff at Institute of Physics Publishing, led by Alice Malhador, I will strive to grow, improve and deliver a journal which reflects the excellent science from the low-temperature plasma community. We hope we can continue to count on your vital support as authors and referees.

Artificial Photosynthesis: Beyond Mimicking Nature

DOE PAGES

Dau, Holger; Fujita, Etsuko; Sun, Licheng

2017-11-13

In this Editorial, Guest Editors Holger Dau, Etsuko Fujita, and Licheng Sun introduce the Special Issue of ChemSusChem on “Artificial Photosynthesis for Sustainable Fuels”. Here, they discuss the need for non-fossil based fuels, introduce both biological and artificial photosynthesis, and outline various important concepts in artificial photosynthesis, including molecular and solid-state catalysts for water oxidation and hydrogen evolution, catalytic CO 2 reduction, and photoelectrochemical systems.

BMC Ecology Image Competition 2016: the winning images.

PubMed

Simundza, Julia; Palmer, Matthew; Settele, Josef; Jacobus, Luke M; Hughes, David P; Mazzi, Dominique; Blanchet, Simon

2016-08-09

The 2016 BMC Ecology Image Competition marked another celebration of the astounding biodiversity, natural beauty, and biological interactions documented by talented ecologists worldwide. For our fourth annual competition, we welcomed guest judge Dr. Matthew Palmer of Columbia University, who chose the winning image from over 140 entries. In this editorial, we highlight the award winning images along with a selection of highly commended honorable mentions.

Artificial Photosynthesis: Beyond Mimicking Nature

DOE Office of Scientific and Technical Information (OSTI.GOV)

Dau, Holger; Fujita, Etsuko; Sun, Licheng

In this Editorial, Guest Editors Holger Dau, Etsuko Fujita, and Licheng Sun introduce the Special Issue of ChemSusChem on “Artificial Photosynthesis for Sustainable Fuels”. Here, they discuss the need for non-fossil based fuels, introduce both biological and artificial photosynthesis, and outline various important concepts in artificial photosynthesis, including molecular and solid-state catalysts for water oxidation and hydrogen evolution, catalytic CO 2 reduction, and photoelectrochemical systems.

EDITORIAL: Greetings from the new Editor-in-Chief Greetings from the new Editor-in-Chief

NASA Astrophysics Data System (ADS)

Nielsch, Kornelius

2012-01-01

On 1 January 2012 I will be assuming the position of Editor-in-Chief of the journal Semiconductor Science and Technology (SST). I am flattered by the confidence expressed in my ability to carry out this challenging job and I will try hard to justify this confidence. The previous Editor-in-Chief, Laurens Molenkamp, University of Würzburg, Germany, has worked tirelessly for the last ten years and has done an excellent job for the journal. Everyone at the journal is profoundly grateful for his leadership and for his achievements In 2012 several new members will join the Editorial Board: Professor Deli Wang (University of California, San Diego) with considerable expertise in semiconductor nanowires, Professor Saskia Fischer (Humboldt University, Berlin, Germany) with a background in semiconductor quantum devices, and Professor Erwin Kessels (Eindhoven University of Technology, Netherlands) with extensive experience in plasma processing of thin films and gate oxides. In particular, I want to express my gratitude to Professor Israel Bar-Joseph (Weizmann Institute of Science, Israel) and Professor Maria Tamargo (The City College of New York, USA), who will leave next year and who have vigorously served the Editorial Board for years. The journal has recently introduced a fast-track option for manuscripts. This option is a high-quality, high-profile outlet for new and important research across all areas of semiconductor research. Authors can expect to receive referee reports in less than 20 days from submission. Once accepted, you can expect the articles to be online within two or three weeks from acceptance and to be published in print in less than a month. Furthermore, all fast-track communications published in 2011 will be free to read for ten years. More detailed information on fast-track publication can be found on the following webpage: http://iopscience.iop.org/0268-1242/page/Fast track communications It is encouraging to see that since the journal introduced pre-review, with the aim to raise the quality of our content, three years later the number of published articles has remained stable at around 220 per year, whilst the number of downloads and citations to the journal has grown. In 2011, three topical issues have been published, on: (Nano)characterization of semiconductor materials and structures (Guest Editor: Alberta Bonanni, University of Linz, Austria) Flexible OLEDs and organic electronics (Guest Editors: Jang-Joo Kim, Min-Koo Han, Cambridge University, UK, and Yong-Young Noh, Seoul National University, Korea) From heterostructures to nanostructures: an 80th birthday tribute to Zhores Alferov (Guest Editor: Dieter Bimberg, Technische Universität Berlin, Germany) For the coming years, I will strongly support that the number of published topical issues will continue on the same level or slightly rise. SST has planned the publication of the following topical issues for 2012: Non-polar and semipolar nitride semiconductors (Guest Editors: Jung Han, Yale University, USA, and Michael Kneissl, Technische Universität Berlin, Germany) Topological insulators (Guest Editors: Alberto Morpurgo, Université de Genève, Switzerland and Björn Trauzettel, Universität Basel, Switzerland) Atomic layer deposition (Guest Editor: Marek Godlewski, Polish Academy of Sciences, Poland) 50th Anniversary of the laser diode (Guest Editors: Mike Adams, Univeristy of Essex, UK and Stephane Calvez, University of Strathclyde, UK) In addition to the traditional topics of SST, I as Editor-in-chief, strongly support and welcome the submission of manuscripts on organic semiconductors, topological insulators, semiconductor nanostructures for photovoltaic, solid-state lighting and energy harvesting, IC application beyond Moore's law and fundamental works on semiconductors based on abundant materials. I am extremely optimistic about the future of SST. I believe that we will raise the standards of acceptance while maintaining the short time from submission to first decision. I am confident that we will continue to improve the quality of the papers published in this already first-class journal. I look forward to working with the journal's excellent staff and Editorial Board Members.

Understanding Protein-Protein Interactions: Essential Players in (Patho)physiology (Part 1).

PubMed

Wilson, Andrew J; Gunning, Patrick T

2016-04-15

This is the first of a two-part Editorial by the Guest Editors of the ChemBioChem and ChemMedChem joint Special Issue on Protein-Protein Interactions. Part 2 can be accessed via http://dx.doi.org/10.1002/cmdc.201600158; the complete issue can be viewed here: bit.ly/cbcVIppi. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Editorial.

PubMed

Simeonov, Plamen L; Rosen, Steven M; Gare, Arran; Noble, Denis

2015-12-01

Preparing this ambitious Special Issue has challenged everyone involved: authors, reviewers, and guest editors. The editors solicited contributions from many leading figures in a broad array of scientific and philosophical disciplines, with emphasis on phenomenological approaches to philosophy (see Section I). The motivating force was the conviction that if we could find a viable bridge for the gap between the "two cultures"(1) of science and philosophy, fundamental problems in each camp could be addressed more fruitfully than ever before and a new kind of science be born. We believe the unprecedented cross-fertilization of ideas from this initiative may furnish seeds from which that new, better integrated, and more effective approach to science may arise. This Special Issue consists of forty papers. For each one, multiple reviewers were solicited, with at least one reviewer from each "culture" (a scientist and a philosopher). In many cases, several rounds of revision were carried out. Needless to say, this required great patience and dedication of all participants. The editors gratefully acknowledge the contributions of our authors, and of our anonymous reviewers, who worked long and hard on the papers we sent them with no compensation for their efforts. We also wish to thank the Elsevier editorial and production team for the support they gave us in bringing this project to fruition. We would now like to offer a synoptic overview of the Special Issue, proceeding section by section and paper by paper. Our hope is that the reader will find this unique effort to marry science and philosophy both meaningful and enjoyable. Copyright © 2015. Published by Elsevier Ltd.

Engineering for Life Sciences: A Fruitful Collaboration Enabled by Chemistry.

PubMed

Niemeyer, Christof M

2017-02-13

"… The interaction of engineering and life sciences has a long history that is characterized by a mutual dependency. The role of chemistry in these developments is to connect the engineers' instrumentation with the life scientists' specimens. This very successful partnership will further continue to produce essential and innovative solutions for future challenges …" Read more in the Guest Editorial by Christof M. Niemeyer. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

22 CFR 2.4 - Designation of official guests.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Designation of official guests. 2.4 Section 2.4... Protocol. The designation of a person as an official guest is final. Pursuant to section 2658 of title 22... official guests is hereby delegated to the Chief of Protocol. (22 U.S.C. 2658) [45 FR 55716, Aug. 21, 1980] ...

Thoughts on Chemistry and Scientific Truth in Post-Factual Times.

PubMed

Schreiner, Peter R

2018-04-19

"… The value and meaning of scientific truth has not been overcome by postmodernism or post-factual tendencies. Just because politics is mostly a representation of opinions, this does not imply that truth has become irrelevant. Quite the opposite, the value of truth is growing in turbulent times and for scientists it constitutes the currency of credibility and accountability …" Read more in the Guest Editorial by Peter R. Schreiner. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Heritage Science: A Future-Oriented Cross-Disciplinary Field.

PubMed

Strlič, Matija

2018-06-18

"Heritage science is the study of interpretation and management of the material evidence of the humankind. It enables both society and individuals to exercise their right to cultural heritage and contributes to our understanding of who we are and our sense of place. Heritage science demonstrates its relevance to, as well as its deep roots in chemistry, and in other physical and engineering sciences …" Read more in the Guest Editorial by Matija Strlič. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Guest Editorial: The Professional Status of European Chemists and Chemical Engineers.

PubMed

Salzer, Reiner; Taylor, Philip; Majcen, Nineta H; De Angelis, Francesco; Wilmet, Sophie; Varella, Evangelia; Kozaris, Ioannis

2015-07-06

Which country pays its chemists and chemical engineers the highest salaries? Where can I find a new job quickest? Which chemical sub-discipline offers most jobs? Reliable answers for these and other questions have been derived from the first European employment survey for chemists and chemical engineers, which was carried out in 2013. Here we publish the first general evaluation of the results of this survey. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

BMC Ecology image competition 2014: the winning images

PubMed Central

2014-01-01

BMC Ecology showcases the winning entries from its second Ecology Image Competition. More than 300 individual images were submitted from an international array of research scientists, depicting life on every continent on earth. The journal’s Editorial Board and guest judge Caspar Henderson outline why their winning selections demonstrated high levels of technical skill and aesthetic sense in depicting the science of ecology, and we also highlight a small selection of highly commended images that we simply couldn’t let you miss out on. PMID:25178017

Modern physics - Guest editorial

NASA Astrophysics Data System (ADS)

Howes, Ruth

2000-02-01

What an exciting time to be a physicist! You only have to attend the plenaries at an AAPT meeting to realize just how many mysteries there still are. Will string theory actually prove to be a Theory of Everything? Can we use physics to understand, predict, and perhaps eventually mitigate damaging hurricanes? Is the warming trend of the Earth due to man-made changes in the atmosphere? Have we found the nuclear "island of stability" with elements 114, 116, and 118? For that matter, why is ice slippery?

BMC Ecology image competition 2014: the winning images.

PubMed

Harold, Simon; Henderson, Caspar; Baguette, Michel; Bonsall, Michael B; Hughes, David; Settele, Josef

2014-08-29

BMC Ecology showcases the winning entries from its second Ecology Image Competition. More than 300 individual images were submitted from an international array of research scientists, depicting life on every continent on earth. The journal's Editorial Board and guest judge Caspar Henderson outline why their winning selections demonstrated high levels of technical skill and aesthetic sense in depicting the science of ecology, and we also highlight a small selection of highly commended images that we simply couldn't let you miss out on.

BMC Ecology Image Competition 2015: the winning images.

PubMed

Potenski, Catherine J; Porzecanski, Ana Luz; Baguette, Michel; Clobert, Jean; Hughes, David; Settele, Josef

2015-07-29

For the third time, BMC Ecology is delighted to announce the winners of our Image Competition. This year featured entries from all over the world and showcased not only the creativity and talent of the participants, but also the exquisite beauty and diversity of our planet. We are pleased to present the winning selections of the editorial board of the journal and guest judge Dr. Ana Luz Porzecanski, as well as some highly commended images that are sure to impress.

Elsevier/Spectrochimica Acta Atomic Spectroscopy Award 2014

NASA Astrophysics Data System (ADS)

Omenetto, Nicolo'; de Loos, Greet

2016-03-01

This is to announce the 2014 Elsevier/Spectrochimica Acta Award, the annual award honoring the most significant article(s) published in a volume. Elsevier makes this award on behalf of Spectrochimica Acta, Part B, to encourage the publication of top articles in this journal. All papers published during one year are considered for this award and the Editorial Advisory Board and the Guest Editor(s) of the special issue(s) are responsible for the selection. The award consists of a monetary prize of 1000 together with a presentation certificate.

Elsevier/Spectrochimica Acta atomic spectroscopy award 2015

NASA Astrophysics Data System (ADS)

Omenetto, Nicolo; de Loos-Vollebregt, Margaretha

2016-12-01

This is to announce the 2015 Elsevier/Spectrochimica Acta award, the annual award honoring the most significant article(s) published in a volume. Elsevier makes this award on behalf of Spectrochimica Acta, Part B, to encourage the publication of top articles in this journal. All papers published during one year are considered for this award and the Editorial Advisory Board and the Guest Editor(s) of the special issue(s) are responsible for the selection. The award consists of a monetary prize of 1000 together with a presentation certificate.

New Polymers: Beautiful Structures, But How Can We Bring Them to the Market?

PubMed

Voit, Brigitte

2017-03-06

"… Nobody in our academic polymer community doubts that polymers are the materials of the 21st century, and will continue to enable and drive the development of future technologies, and ensure our high standard of living and wellbeing in the context of both an aging population and the energy transformation. However, we should be aware that there is a difference between polymers and plastics …" Read more about this perspective in the Guest Editorial by Brigitte Voit. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Guest Editorial

NASA Astrophysics Data System (ADS)

Saravanan, Padmanapan; Babu, Dhanakotti Rajan; Chelvane, Jeyaramane Arout; Vizhi, Rajasekaran Ezhil

2016-11-01

This special issue of Journal of Magnetism and Magnetic Materials (JMMM) is a collection of selected papers presented at the International Conference on Magnetic Materials and Applications (ICMAGMA-2015), held at VIT University, Vellore, India during December 2 - 4, 2015. The papers were screened and selected for publication after an intensive peer review, with a minimum of two reviewers for every paper. The editors would like to place on record the unstinted support received from over 100 reviewers which culminated in the selection of 49 manuscripts for publication. We take this opportunity to thank everyone for participating in the ICMAGMA-2015.

Guest editorial: Special issue micro-and nanomachines.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sanchez, Samuel; Paxton, Walter F.; Nitta, Takahiro

The articles in this special section focus on the technologies and applications supported by micro- and nanomachines. The world of artificial micro- and nanomachines has greatly expanded over the last few years to include a range of disciplines from chemistry, physics, biology, to micro/nanoengineering, robotics, and theoretical physics. The dream of engineering nanomachines involves fabricating devices that mimic the mechanical action of biological motors that operate over multiple length scales: from molecular-scale enzymes and motors such as kinesins to the micro-scale biomachinery responsible for the motility of tiny organisms such as the flagella motors of E. coli. However, the designmore » and fabrication of artificial nano- and micromachines with comparable performance as their biological counterparts is not a straightforward task. It requires a detailed understanding of the basic principles of the operation of biomotors and mechanisms that couple the dissipation of energy to mechanical motion. Furthermore, micro engineering and microfabrication knowledge is required in order to design efficient, small and even smart micro- and nanomachines.« less

Guest Editorial: Special Section on InterPACK 2017 - Part 2

DOE Office of Scientific and Technical Information (OSTI.GOV)

Narumanchi, Sreekant V; Mysore, Kaushik; Dede, Ercan

InterPACK is a premier international forum for exchange of state-of-the-art knowledge in research, development, manufacturing, and applications of micro-electronics packaging. It is the flagship conference of the ASME Electronic and Photonic Packaging Division (EPPD) founded in 1992 as an ASME-JSME joint biannual conference. Rapid changes in the semiconductor landscape together with findings from InterPACK Pathfinding workshop (IPW) in 2016 led to a significant reset of InterPACK conference priorities and focus to comprehensively address needs of the InterPACK community. As a result, starting in 2017, InterPACK has become an annual conference and the scope of the conference has increased significantly togethermore » with a systems-focus to include some of the most cutting-edge topics in electronics packaging, device integration, and reliability. These topics are organized across five different tracks: (1) heterogeneous integration: microsystems with diverse functionality, (2) servers of the future, (3) structural and physical health monitoring, (4) energy conversion and storage, and (5) transportation: autonomous and electric vehicles.« less

Guest editorial: Special issue micro-and nanomachines.

DOE PAGES

Sanchez, Samuel; Paxton, Walter F.; Nitta, Takahiro

2015-04-01

The articles in this special section focus on the technologies and applications supported by micro- and nanomachines. The world of artificial micro- and nanomachines has greatly expanded over the last few years to include a range of disciplines from chemistry, physics, biology, to micro/nanoengineering, robotics, and theoretical physics. The dream of engineering nanomachines involves fabricating devices that mimic the mechanical action of biological motors that operate over multiple length scales: from molecular-scale enzymes and motors such as kinesins to the micro-scale biomachinery responsible for the motility of tiny organisms such as the flagella motors of E. coli. However, the designmore » and fabrication of artificial nano- and micromachines with comparable performance as their biological counterparts is not a straightforward task. It requires a detailed understanding of the basic principles of the operation of biomotors and mechanisms that couple the dissipation of energy to mechanical motion. Furthermore, micro engineering and microfabrication knowledge is required in order to design efficient, small and even smart micro- and nanomachines.« less

Everything is connected: social determinants of pediatric health and disease.

PubMed

Tarazi, Carine; Skeer, Margie; Fiscella, Kevin; Dean, Stephanie; Dammann, Olaf

2016-01-01

Carine Tarazi, MA, is an Assistant Editor for Pediatric Research in Boston, Massachusetts, USA. Margie Skeer, ScD, MPH, MSW, served as a Guest Editor for this special issue. Dr. Skeer is Assistant Professor of Public Health and Community Medicine at Tufts University. Her research focuses on adolescent substance misuse and sexual risk prevention, both from epidemiologic and intervention-development perspectives. Kevin Fiscella, MD, MPH, served as a Guest Editor for this special issue. Dr. Fiscella is Tenured Professor of Family Medicine, Public Health Sciences and Community Health at the University of Rochester Medical Center. Dr. Fiscella's research focuses on health and health care disparities, particularly practical strategies to improve health equity. Stephanie Dean, MBA, is Managing Editor of Pediatric Research and is based out of editorial office in The Woodlands, Texas. Olaf Dammann, MD, served as a Guest Editor for this special issue. Dr. Dammann is a Professor of Public Health and Community Medicine, Pediatrics, and Ophthalmology at Tufts University School of Medicine in Boston, Massachusetts, USA, as well as Professor of Perinatal Neuroepidemiology at Hannover Medical School, Hannover, Germany. His research interests include the elucidation of risk factors for brain damage and retinopathy in preterm newborns, the theory of risk and causation in biomedical and public health research, and the development of computational chronic disease models.

2017 in-training initiative of the Journal of Assisted Reproduction and Genetics: the JARG Young Investigator Forum.

PubMed

Goldman, Kara N; Patrizio, Pasquale; Albertini, David

2017-01-01

The Journal of Assisted Reproduction and Genetics introduces the JARG Young Investigator Forum, an in-training initiative aimed to expand opportunities for young investigators. The JARG Young Investigator Forum has three primary goals: first, to increase opportunities for trainees and young investigators to contribute as researchers and writers. Trainees will be invited to publish mini-reviews based on their area of research interest/expertise and will have the opportunity to indicate "in-training" when submitting manuscripts as first author Educational research pertaining to reproductive medicine training will be added to the purview of the journal. Second, the Young Investigator Forum will increase opportunities for trainees to serve as journal reviewers and will provide mentorship throughout the peer review process. Third, trainees will have the unique opportunity to gain editorial experience by serving as a "guest editor" of the Young Investigator Forum, overseeing all editorial aspects of their assigned particular issue. Through authorship, peer review, and editorial experience, we seek to nurture the academic skills that are critical to a well-rounded career. The JARG Young Investigator Forum aims to foster career development for a generation of trainees who represent the future of reproductive medicine, and here, we outline the primary goals and objectives of the initiative.

Sustainable Chemistry at Sungkyunkwan University.

PubMed

Park, Nam-Gyu

2015-07-20

Special Issue: Sustainable Chemistry at Sungkyunkwan University. Sustainable chemistry is key to the development of efficient renewable energies, which will become more and more important in order to combat global warming. In this Editorial, guest editor Prof. Nam-Gyu Park describes the context of this Special Issue on top-quality research towards sustainability performed at Sungkyunkwan University (SKKU) in Korea. Scientists at SKKU work on, for example, photovoltaic solar cells to generate low-cost electricity, lithium batteries and capacitors to store electricity, piezoelectric nanogenerators, thermoelectric devices, hydrogen generation, and fuel cells. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

15 CFR 10.12 - Editorial changes.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Editorial changes. 10.12 Section 10.12... PRODUCT STANDARDS § 10.12 Editorial changes. The Department may, without prior notice, make such editorial or other minor changes as it deems necessary to reduce ambiguity or to improve clarity in any...

Perovskite Solar Cells and Devices at EPFL Valais Wallis.

PubMed

Nazeeruddin, Mohammad Khaja

2016-09-22

Stability required! Perovskite solar cells have emerged as one of the most exciting fields of research, owing to their impressive rise in power conversion efficiency surpassing 22% in six short years of research. Current research is focused on ways to improve stability of perovskite-based devices, a key characteristic required to bring this technology from the lab into the market. In this Editorial, guest editor Prof. Mohammad Khaja Nazeeruddin describes the context of this Special Issue, and summarizes the work being performed in his research group toward this low-cost near-future photovoltaic technology. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Guest Editorial

PubMed Central

Namineni, Srinivas

2014-01-01

ABSTRACT At the start of this New Year, I would like to draw attention of pediatric dental fraternity at large toward Raven Maria Blanco Foundation, United States. This is a foundation established by parents of a young girl called Maria, who lost her life in pediatric dental Office, which was not prepared to handle an emergency arising from a procedural sedation for dental treatment. This is very heartening for any parent. It was so heart rending that Grammy award singer Michael Crawford popularly known as ‘Magnedo7’ penned a song called Raven’s Song in her memory. This brings the focus on two important issues: sedation and emergency preparedness in our practices.1 PMID:25709311

47 CFR 76.1613 - Political editorials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Political editorials. 76.1613 Section 76.1613 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE Notices § 76.1613 Political editorials. Where a cable television system...

Industry Collaboration and Primary Guest Authorship of High-Impact Randomized Clinical Trials: A Cross-Sectional Study.

PubMed

Roper, Nitin; Korenstein, Deborah

2015-10-01

Journals have increased disclosure requirements in recent years, in part to deter guest authorship. The prevalence of guest authorship among primary authors (first and last) in the current era of increased disclosure requirements is unknown. Our aim was to examine the self-reported prevalence of guest authorship among primary authors from a sample of randomized clinical trials with and without industry funding and industry collaboration in the design, analysis or reporting of trials. Cross-sectional analysis of randomized, drug/device clinical trials with published details on the "Role of the Funding Source/Sponsor" published in high-impact biomedical journals between 1 December 2011 and 31 November 2012. Phase 1 or 2 trials, secondary trial analyses, and trials that were not listed on ClinicalTrials.gov were excluded. Primary guest authorship was defined, based on International Committee of Medical Journal Editors (ICMJE) criteria, when neither the first nor last author contributed to either of the following: 1) the design of the trial or the analysis/interpretation of data; or 2) drafting part or all of the manuscript. One hundred and sixty-eight randomized clinical trials that met inclusion criteria were included. We measured differences in the prevalence of guest authorship between trials with neither industry funding nor collaboration and 1) trials with industry funding without collaboration, and 2) trials with industry funding with collaboration. The overall prevalence of primary guest authorship was 6 % (10/168). Primary guest authorship was significantly more common in trials with industry funding with collaboration than in those with neither industry funding nor collaboration [13.2 % (10/76) vs. 0 % (0/39); p < 0.02]. Primary guest authorship did not differ between trials with industry funding without collaboration and trials with neither industry funding nor collaboration. Among a sample of randomized, drug/device clinical trials in high-impact biomedical journals, primary guest authorship was overall uncommon and occurred exclusively among trials with industry funding with collaboration.

Guest Editorial Precision Surface Metrology

NASA Astrophysics Data System (ADS)

Wyant, James C.

1984-08-01

During the past two decades there have been many changes in precision surface metrology. The introduction of the laser and the large computer during the 1960s and 1970s produced many changes in testing capabilities and requirements. Several commercial interferometers became available in the 1970s, enabling people who were not necessarily experts in interferometry to use interferometers to produce better optics. Since both buyers and sellers could test optics, the quality of the optics manufactured and sold improved greatly. If a person ordered 1/10 wave optics, he would probably get 1/10 wave or better optics; if he got optics of lower quality, he would know it, and he could prove it and return it.

Unlocking Flexibility: Energy Systems Integration [Guest Editorial

DOE Office of Scientific and Technical Information (OSTI.GOV)

O'Malley, Mark; Kroposki, Benjamin

2017-01-01

The articles in this special section focus on energy systems integration (ESI). Electric power systems around the world are experiencing great changes, including the retirement of coal and nuclear plants along with a rapid increase in the use of natural gas turbines and variable renewable technologies such as wind and solar. There is also much more use of information and communications technologies to enhance the visibility and controllability of the grid. Flexibility of operation, the ability of a power system to respond to change in demand and supply, is critical to enable higher levels of variable generation. One way tomore » unlock this potential flexibility is to tap into other energy domains. This concept of interconnecting energy domains is called ESI. ESI is the process of coordinating the operation and planning of energy systems across multiple pathways and/or geographical scales to deliver reliable, cost-effective energy services with minimal impact on the environment. Integrating energy domains adds flexibility to the electrical power system. ESI includes interactions among energy vectors and with other large-scale infrastructures including water, transport, and data and communications networks, which are an enabling technology for ESI.« less

11 CFR 100.132 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 11 Federal Elections 1 2011-01-01 2011-01-01 false News story, commentary, or editorial by the media. 100.132 Section 100.132 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND... media. Any cost incurred in covering or carrying a news story, commentary, or editorial by any...

11 CFR 100.132 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 11 Federal Elections 1 2010-01-01 2010-01-01 false News story, commentary, or editorial by the media. 100.132 Section 100.132 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND... media. Any cost incurred in covering or carrying a news story, commentary, or editorial by any...

11 CFR 100.132 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 11 Federal Elections 1 2013-01-01 2012-01-01 true News story, commentary, or editorial by the media. 100.132 Section 100.132 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND... media. Any cost incurred in covering or carrying a news story, commentary, or editorial by any...

11 CFR 100.132 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 11 Federal Elections 1 2012-01-01 2012-01-01 false News story, commentary, or editorial by the media. 100.132 Section 100.132 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND... media. Any cost incurred in covering or carrying a news story, commentary, or editorial by any...

11 CFR 100.132 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 11 Federal Elections 1 2014-01-01 2014-01-01 false News story, commentary, or editorial by the media. 100.132 Section 100.132 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND... media. Any cost incurred in covering or carrying a news story, commentary, or editorial by any...

11 CFR 100.73 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 11 Federal Elections 1 2010-01-01 2010-01-01 false News story, commentary, or editorial by the media. 100.73 Section 100.73 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND DEFINITIONS (2 U.S.C. 431) Exceptions to Contributions § 100.73 News story, commentary, or editorial by the media...

11 CFR 100.73 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 11 Federal Elections 1 2014-01-01 2014-01-01 false News story, commentary, or editorial by the media. 100.73 Section 100.73 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND DEFINITIONS (2 U.S.C. 431) Exceptions to Contributions § 100.73 News story, commentary, or editorial by the media...

11 CFR 100.73 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 11 Federal Elections 1 2011-01-01 2011-01-01 false News story, commentary, or editorial by the media. 100.73 Section 100.73 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND DEFINITIONS (2 U.S.C. 431) Exceptions to Contributions § 100.73 News story, commentary, or editorial by the media...

11 CFR 100.73 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 11 Federal Elections 1 2013-01-01 2012-01-01 true News story, commentary, or editorial by the media. 100.73 Section 100.73 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND DEFINITIONS (2 U.S.C. 431) Exceptions to Contributions § 100.73 News story, commentary, or editorial by the media...

11 CFR 100.73 - News story, commentary, or editorial by the media.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 11 Federal Elections 1 2012-01-01 2012-01-01 false News story, commentary, or editorial by the media. 100.73 Section 100.73 Federal Elections FEDERAL ELECTION COMMISSION GENERAL SCOPE AND DEFINITIONS (2 U.S.C. 431) Exceptions to Contributions § 100.73 News story, commentary, or editorial by the media...

Guest-Service Agent. Teacher Edition.

ERIC Educational Resources Information Center

Al-Harake, Mounzer

This teacher's guide for the hospitality and tourism industry is designed to include the entry-level competencies students will need to enter any of the occupational areas identified in the front-desk section of the lodging occupations cluster. These occupations include front-desk clerk, cashier, telephone operator, guest-service agent,…

Editorial: Conference Comments by the General Chair

NASA Astrophysics Data System (ADS)

LaBel, Ken

2012-12-01

An overview is presented of the 49th Annual International Nuclear and Space Radiation Effects Conference (NSREC), held July 16-20, 2012 at the InterContinental Hotel in downtown Miami, Florida, USA. The 2012 Conference followed previous editions as an international radiation effects on electronics, materials, and systems showcase. The conference was sponsored by the Radiation Effects Committee of the IEEE Nuclear and Plasma Sciences Society. In addition, NSREC was supported by a cadre of government agencies and industry members. The 2012 edition of the conference was attended by 607 members of the radiation effects community. Of this number, 118 non-US attendees participated from 20 different countries with particularly strong attendance from France, United Kingdom, Japan, Canada, and Germany. Total attendance including exhibitors and guests was 802 people.

EDITORIAL: (Nano)characterization of semiconductor materials and structures (Nano)characterization of semiconductor materials and structures

NASA Astrophysics Data System (ADS)

Bonanni, Alberta

2011-06-01

The latest impressive advancements in the epitaxial fabrication of semiconductors and in the refinement of characterization techniques have the potential to allow insight into the deep relation between materials' structural properties and their physical and chemical functionalities. Furthermore, while the comprehensive (nano)characterization of semiconductor materials and structures is becoming more and more necessary, a compendium of the currently available techniques is lacking. We are positive that an overview of the hurdles related to the specific methods, often leading to deceptive interpretations, will be most informative for the broad community working on semiconductors, and will help in shining some light onto a plethora of controversial reports found in the literature. From this perspective, with this special issue we address and highlight the challenges and misinterpretations related to complementary local (nanoscale) and more global experimental methods for the characterization of semiconductors. The six topical reviews and the three invited papers by leading experts in the specific fields collected in here are intended to provide the required broad overview on the possibilities of actual (nano)characterization methods, from the microscopy of single quantum structures, over the synchrotron-based absorption and diffraction of nano-objects, to the contentious detection of tiny magnetic signals by quantum interference and resonance techniques. We are grateful to all the authors for their valuable contributions. Moreover, I would like to thank the Editorial Board of the journal for supporting the realization of this special issue and for inviting me to serve as Guest Editor. We greatly appreciate the work of the reviewers, of the editorial staff of Semiconductor Science and Technology and of IOP Publishing. In particular, the efforts of Alice Malhador in coordinating this special issue are acknowledged.

Breakthroughs in Medicinal Chemistry: New Targets and Mechanisms, New Drugs, New Hopes-2.

PubMed

Muñoz-Torrero, Diego; Mangoni, Arduino A; Liu, Hong; Hulme, Christopher; Rautio, Jarkko; Karaman, Rafik; de Sousa, Maria Emília; Prokai-Tatrai, Katalin; Sabatier, Jean-Marc; Siciliano, Carlo; Luque, F Javier; Kokotos, George; Ragno, Rino; Collina, Simona; Guillou, Catherine; Gütschow, Michael; Agrofoglio, Luigi A

2017-12-28

Breakthroughs in Medicinal Chemistry: New Targets and Mechanisms, New Drugs, New Hopes is a series of Editorials, which are published on a biannual basis by the Editorial Board of the Medicinal Chemistry section of the journal Molecules [...].

47 CFR 76.209 - Fairness doctrine; personal attacks; political editorials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Fairness doctrine; personal attacks; political editorials. 76.209 Section 76.209 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE Cablecasting § 76.209 Fairness doctrine...

Dispersed publication of editorial research.

PubMed

Rosenberg, Jacob; Pommergaard, Hans-Christian; Vinther, Siri; Burcharth, Jakob

2015-02-01

There seems to be no dedicated journals available for publication of editorial research in the biomedical sciences; that is research into editorial or publication process issues involving the scientific approach to writing, reviewing, editing and publishing. It is unknown where papers concerning these issues are typically published. We therefore set out to study the distribution of such papers in the biomedical literature. In this pilot study, we conducted a MEDLINE search for papers on editorial research published in the year 2012. We found 445 articles published in 311 journals with a median of one article per journal (range: 1-17). The publication of papers on editorial research seems to be dispersed. In order to increase the visibility of this research field, it may be reasonable to establish well-defined platforms such as dedicated journals or journal sections in which such research could preferably be published.

Guest Editorial Image Quality

NASA Astrophysics Data System (ADS)

Cheatham, Patrick S.

1982-02-01

The term image quality can, unfortunately, apply to anything from a public relations firm's discussion to a comparison between corner drugstores' film processing. If we narrow the discussion to optical systems, we clarify the problem somewhat, but only slightly. We are still faced with a multitude of image quality measures all different, and all couched in different terminology. Optical designers speak of MTF values, digital processors talk about summations of before and after image differences, pattern recognition engineers allude to correlation values, and radar imagers use side-lobe response values measured in decibels. Further complexity is introduced by terms such as information content, bandwidth, Strehl ratios, and, of course, limiting resolution. The problem is to compare these different yardsticks and try to establish some concrete ideas about evaluation of a final image. We need to establish the image attributes which are the most important to perception of the image in question and then begin to apply the different system parameters to those attributes.

CALL FOR PAPERS: Optics and squeeze transformations after Einstein

NASA Astrophysics Data System (ADS)

Kim, Young S.; Man'ko, Margarita A.; Planat, Michel

2005-01-01

Journal of Optics B: Quantum and Semiclassical Optics will publish a special issue in connection with the 9th International Conference on Squeezed States and Uncertainty Relations, to be held in Besançon, France, on 2-6 May 2005. In 2005, the physics community celebrates the 100th anniversary of the publication of Einstein’s theories of relativity and quantum physics. To celebrate these great contributions to physics, the conference will include sessions on Einstein’s influence on modern optics and the foundations of quantum mechanics. Conference participants, as well as other researchers working in the field, are invited to submit research papers to this special issue of the journal. The topics to be covered include: • Superposition principle • Squeezed states • Uncertainty relations • Quantum state generation and characterization • Phase space and group representations in quantum physics • Quantum transforms in signal analysis • Information theory and quantum computing • Quantum interference, decoherence and entanglement measure • Quantum chaos and quantum control • Bell inequalities • Nonstationary Casimir effect • Quantum-like and mesoscopic systems Manuscripts should be submitted by 1 August 2005 as the special issue is scheduled for publication in March 2006. All papers will be peer reviewed and the normal refereeing standards of Journal of Optics B: Quantum and Semiclassical Optics will be maintained. The Editorial Division of IOP Publishing at the P N Lebedev Physical Institute in Moscow will oversee editorial procedures in association with the IOP Publishing office in Bristol. There are no page charges for publication. Submissions should preferably be in either standard LaTeX form or Microsoft Word. Advice on publishing your work in the journal, including specific information on figures, tables and references, may be found at www.iop.org/journals/authors. Manuscripts should be submitted by e-mail to the Guest Editors at IOPP@sci.lebedev.ru quoting the reference 'Special Issue/ST'. Authors are strongly encouraged to submit their work as soon as possible. Any subsequent change of address should be notified to the publishing office. If you have any questions, please do not hesitate to contact Claire Bedrock, Publisher (claire.bedrock@iop.org) or Margarita A Man'ko, Guest Editor (mmanko@sci.lebedev.ru). For further information on the journal, please visit our Website at www.iop.org/journals/jopb.

CALL FOR PAPERS: Optics and squeeze transformations after Einstein

NASA Astrophysics Data System (ADS)

Kim, Young S.; Man'ko, Margarita A.; Planat, Michel

2004-12-01

Journal of Optics B: Quantum and Semiclassical Optics will publish a special issue in connection with the 9th International Conference on Squeezed States and Uncertainty Relations, to be held in Besançon, France, on 2-6 May 2005. In 2005, the physics community celebrates the 100th anniversary of the publication of Einstein’s theories of relativity and quantum physics. To celebrate these great contributions to physics, the conference will include sessions on Einstein’s influence on modern optics and the foundations of quantum mechanics. Conference participants, as well as other researchers working in the field, are invited to submit research papers to this special issue of the journal. The topics to be covered include: • Superposition principle • Squeezed states • Uncertainty relations • Quantum state generation and characterization • Phase space and group representations in quantum physics • Quantum transforms in signal analysis • Information theory and quantum computing • Quantum interference, decoherence and entanglement measure • Quantum chaos and quantum control • Bell inequalities • Nonstationary Casimir effect • Quantum-like and mesoscopic systems Manuscripts should be submitted by 1 August 2005 as the special issue is scheduled for publication in March 2006. All papers will be peer reviewed and the normal refereeing standards of Journal of Optics B: Quantum and Semiclassical Optics will be maintained. The Editorial Division of IOP Publishing at the P N Lebedev Physical Institute in Moscow will oversee editorial procedures in association with the IOP Publishing office in Bristol. There are no page charges for publication. Submissions should preferably be in either standard LaTeX form or Microsoft Word. Advice on publishing your work in the journal, including specific information on figures, tables and references, may be found at www.iop.org/journals/authors. Manuscripts should be submitted by e-mail to the Guest Editors at IOPP@sci.lebedev.ru quoting the reference 'Special Issue/ST'. Authors are strongly encouraged to submit their work as soon as possible. Any subsequent change of address should be notified to the publishing office. If you have any questions, please do not hesitate to contact Claire Bedrock, Publisher (claire.bedrock@iop.org) or Margarita A Man'ko, Guest Editor (mmanko@sci.lebedev.ru). For further information on the journal, please visit our Website at www.iop.org/journals/jopb.

Editorial: Nanobio versus Bionano--what's in a name?

PubMed

Baneyx, François; Park, Je-Kyun

2013-02-01

Nanobio versus Bionano--what's in a name? This special Issue of Biotechnology Journal includes two sections, one featuring articles on nanobio, the other articles on bionano. The editors of the issue, François Baneyx and Je-Kyun Park, discuss the similarities and differences between the two in their editorial. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Modeling off-resonant nonlinear-optical cascading in mesoscopic thin films and guest-host molecular systems

NASA Astrophysics Data System (ADS)

Dawson, Nathan J.; Andrews, James H.; Crescimanno, Michael

2013-12-01

A model for off-resonant microscopic cascading of (hyper)polarizabilities is developed using a self-consistent field approach to study mesoscopic systems of nonlinear polarizable atoms and molecules. We find enhancements in the higher-order susceptibilities resulting from geometrical and boundary orientation effects. We include an example of the dependence on excitation beam cross sectional structure and a simplified derivation of the microscopic cascading of the nonlinear-optical response in guest-host systems.

First International Conference on Organic Nonlinear Optics. Section B: Nonlinear Optics, Principles, Materials, Phenomena, and Devices.

DTIC Science & Technology

1994-01-01

kET/T1T 2 ) (solid lines). clusters of guest molecules with local concentrations exceeding the average value of about 1 pentacene /(50 ,A) in the highest...that the transport topology of singlet excitation energy is determined by the local distribu- tions of pentacene guests in the crystal. A singlet...Pullman, USA S. Miyata (co-chair), Tokyo University of Technology and Agriculture, Tokyo, Japan Local Organizing Committee F. Charra (secretary) P.-A

Thank You to All JOSPT Contributors for 2016.

PubMed

Abbott, J Haxby

2016-12-01

On behalf of the many stakeholders in the Journal of Orthopaedic & Sports Physical Therapy (JOSPT), including the Sections and international partners, readers, Editorial Board, and authors, Editor-in-Chief J. Haxby Abbott gives thanks and recognizes all of the many individuals who have contributed to the editorial process and content of JOSPT this past year. J Orthop Sports Phys Ther 2016;46(12):1018-1020. doi:10.2519/jospt.2016.0116.

Thank You to All JOSPT Contributors for 2017.

PubMed

Abbott, J Haxby

2017-12-01

On behalf of the many stakeholders in the Journal of Orthopaedic & Sports Physical Therapy (JOSPT), including the Sections and international partners, readers, Editorial Board, and authors, Editor-in-Chief J. Haxby Abbott gives thanks and recognizes all of the many individuals who have contributed to the editorial process and content of JOSPT this past year. J Orthop Sports Phys Ther 2017;47(12):889-891. doi:10.2519/jospt.2017.0110.

76 FR 56304 - Hazardous Materials: Minor Editorial Corrections and Clarifications

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-13

... this e-mail address. Section 107.127 This section specifies conditions for the availability of... place. Section 172.512 This section prescribes requirements for placarding freight containers and... clarify how freight containers and unit load devices are regulated differently by air transport and other...

Can the retina alone detect the sign of defocus?

PubMed

Schaeffel, Frank; Wildsoet, Christine

2013-05-01

In the following point-counterpoint article, internationally-acclaimed myopia researchers were challenged to defend the two opposing sides of the topic defined by the title; their contributions, which appear in the order, Point followed by Counterpoint, were peer-reviewed by both the editorial team and an external reviewer. Independently of the invited authors, the named member of the editorial team provided an Introduction and Summary, both of which were reviewed by the other members of the editorial team. By their nature, views expressed in each section of the Point-Counterpoint article are those of the author concerned and may not reflect the views of all of the authors. Ophthalmic & Physiological Optics © 2013 The College of Optometrists.

Guest Editorial Introduction to the Special Issue on 'Advanced Signal Processing Techniques and Telecommunications Network Infrastructures for Smart Grid Analysis, Monitoring, and Management'

DOE PAGES

Bracale, Antonio; Barros, Julio; Cacciapuoti, Angela Sara; ...

2015-06-10

Electrical power systems are undergoing a radical change in structure, components, and operational paradigms, and are progressively approaching the new concept of smart grids (SGs). Future power distribution systems will be characterized by the simultaneous presence of various distributed resources, such as renewable energy systems (i.e., photovoltaic power plant and wind farms), storage systems, and controllable/non-controllable loads. Control and optimization architectures will enable network-wide coordination of these grid components in order to improve system efficiency and reliability and to limit greenhouse gas emissions. In this context, the energy flows will be bidirectional from large power plants to end users andmore » vice versa; producers and consumers will continuously interact at different voltage levels to determine in advance the requests of loads and to adapt the production and demand for electricity flexibly and efficiently also taking into account the presence of storage systems.« less

Editorial

NASA Astrophysics Data System (ADS)

Gianturco, F. A.; Raimond, J. M.

2005-01-01

This issue of EPJ D introduces a revised list of sections and subsections, designed in close collaboration with the whole editorial board. The aim of these modifications is to reflect more faithfully the wide diversity of activities covered by our journal. A new section is introduced. Entitled “Atomic and Molecular Collisions”, it covers a large range of activities, from atom/atom or atom/molecules collisions (including the very active field of ultra-cold collisions in laser-cooled atomic or molecular gases), to electron scattering and molecular reactivity. The creation of this section reflects the increased interest of the journal for molecular and collisional physics, already apparent in the recent extension of the editorial board competence in this direction. We very much hope that this community will react positively to this trend and become a major component of the journal's life. For the other sections, we have markedly revised the list of subheadings. We think it important to make it as detailed as possible, both to indicate that EPJ D aims at being a generalist journal for AMO physics and to help our authors to find easily the proper section for their submissions. There is of course no way to describe the whole field's activity in a few subheadings. They are all to be understood with the broadest meaning. This list is by no means an exclusive one. All theoretical or experimental papers connected to atomic, molecular, plasma, quantum or optical physics are welcome. This revised section list appears almost simultaneously with the new WEB portal to all EPJ journals (www.eurphysj.org), which will be online within a few weeks. It unites the material formerly presented on our publisher's WEB sites (EDP Sciences, SIF and Springer). All the journal contents are available there (and all WEB registrations are of course valid for this portal). We offer also a free access to the highlight papers (see our editorial, Eur. Phys. J. D 29, 3 (2004) and below), for at least a year. We hope that this offer will focus more attention on these papers, selected by the editorial board for their wide interest and quality. You will also find on this portal useful information for authors and a direct access to the electronic submission procedures. We look forward to receiving your suggestions for the continued improvement of this important part of the journal. We also think it is necessary to clearly describe, below, our editorial procedures (refereeing, appeals, ethical problems...). The fairness and celerity of the paper handling process are essential components in a journal's image. We hope that our readers and authors will be convinced by the arguments and statistics presented below that EPJ D is worthy of their trust. We are of course also open to suggestions to improve these procedures. As a final word, we would like to thank warmly those members of the editorial board whose term came to its end in 2004: P. Cahuzac, H. Haberland, G. Lampis, A. Politi, F. Romanelli, R. Weinkauf. They devoted considerable efforts for the continued improvement of the journal. We hope they will continue to help us with their advice and support the journal by their scientific production. May we conclude by offering you our best wishes for a happy and productive New World Year of Physics?

Prospects of Optical Single Atom Detection in Noble Gas Solids for Measurements of Rare Nuclear Reactions

NASA Astrophysics Data System (ADS)

Singh, Jaideep; Bailey, Kevin G.; Lu, Zheng-Tian; Mueller, Peter; O'Connor, Thomas P.; Xu, Chen-Yu; Tang, Xiaodong

2013-04-01

Optical detection of single atoms captured in solid noble gas matrices provides an alternative technique to study rare nuclear reactions relevant to nuclear astrophysics. I will describe the prospects of applying this approach for cross section measurements of the ^22Ne,,),25Mg reaction, which is the crucial neutron source for the weak s process inside of massive stars. Noble gas solids are a promising medium for the capture, detection, and manipulation of atoms and nuclear spins. They provide stable and chemically inert confinement for a wide variety of guest species. Because noble gas solids are transparent at optical wavelengths, the guest atoms can be probed using lasers. We have observed that ytterbium in solid neon exhibits intersystem crossing (ISC) which results in a strong green fluorescence (546 nm) under excitation with blue light (389 nm). Several groups have observed ISC in many other guest-host pairs, notably magnesium in krypton. Because of the large wavelength separation of the excitation light and fluorescence light, optical detection of individual embedded guest atoms is feasible. This work is supported by DOE, Office of Nuclear Physics, under contract DE-AC02-06CH11357.

[4 years of Microbiología SEM (1994-1997)].

PubMed

Mas-Castellà, J

1997-12-01

Different aspects of Microbiología SEM editorial process over the years 1994-1997 are analyzed: number of originals received, the process leading to their publication, rates of accepted and refused papers, time needed for each step of the editorial process--which comprises scientific, language editing, if needed--, as well as some characteristics that can define the patterns of the articles, such as number of authors, institutions where the authors work and mean number of references. The contents of the different sections (editorial, research and review articles, perspectives, opinion, books review) are commented on, as well as the role played by some of them as forums for the discussion of topics of current scientific interest, especially the editorials focusing on the state-of-the-art of microbiological research in Latin American countries. Characteristics and frequency of monographic issues are also presented. The information is complemented with data about the circulation and distribution of the journal, its inclusion in international indexes and its current electronic publication on the world wide web.

Clinical trial registration in physical therapy journals: a cross-sectional study.

PubMed

Babu, Abraham Samuel; Veluswamy, Sundar Kumar; Rao, Pratiksha Tilak; Maiya, Arun G

2014-01-01

Clinical trial registration has become an important part of editorial policies of various biomedical journals, including a few physical therapy journals. However, the extent to which editorial boards enforce the need for trial registration varies across journals. The purpose of this study was to identify editorial policies and reporting of trial registration details in MEDLINE-indexed English-language physical therapy journals. This study was carried out using a cross-sectional design. Editorial policies on trial registration of MEDLINE-indexed member journals of the International Society of Physiotherapy Journal Editors (ISPJE) (Journal of Geriatric Physical Therapy, Journal of Hand Therapy, Journal of Neurologic Physical Therapy, Journal of Orthopaedic and Sports Physical Therapy, Journal of Physiotherapy [formerly Australian Journal of Physiotherapy], Journal of Science and Medicine in Sport, Manual Therapy, Physical Therapy, Physical Therapy in Sport, Physiotherapy, Physiotherapy Research International, Physiotherapy Theory and Practice, and Revista Brasileira de Fisioterapia) were reviewed in April 2013. Full texts of reports of clinical trials published in these journals between January 1, 2008, and December 31, 2012, were independently assessed for information on trial registration. Among the 13 journals, 8 recommended trial registration, and 6 emphasized prospective trial registration. As of April 2013, 4,618 articles were published between January 2008 and December 2012, of which 9% (417) were clinical trials and 29% (121/417) of these reported trial registration details. A positive trend in reporting of trial registration was observed from 2008 to 2012. The study was limited to MEDLINE-indexed ISPJE member journals. Editorial policies on trial registration of physical therapy journals and a rising trend toward reporting of trial registration details indicate a positive momentum toward trial registration. Physical therapy journal editors need to show greater commitment to prospective trial registration to make it a rule rather than an option.

Report of the editors, 2014.

PubMed

García Puig, J; Gaspar Alonso-Vega, G; Ríos Blanco, J J

2015-01-01

The editors of Revista Clínica Española(Rev Clin Esp) inform on their editorial activity during the last 12 months: (a) Objectives and attainments in 2014, (b) Editorial activity, 2014, and (c) 2013 impact factor. In 2014 we achieved the 5 planned objectives. We have published the 9 programmed issues and 103% of the planned papers according to the usual fixed sections. We emphasize the publication of 29 editorials, 21 of which are signed by prestigious foreign authors. From the first January to the 30th September 2014 we received 421 manuscripts (46.8 manuscripts per month), a slight lower figure to that obtained in 2013 (50.9 manuscripts per month). The acceptance rate of the 404 manuscripts whose editorial process has been concluded was 32.3% (originals, 22.4%). We asked for 315 revisions to 240 reviewers and we received 53.3% revisions in less than two weeks (10.4 days). The mean time to adopt an editorial decision for all manuscripts («accepted»/«rejected») has been 18,3 (less than half than in 2009). For «originals» this figure has dropped from 56,6 days in 2009 to 26.6 days in 2014. The mean time elapsed from manuscript reception to its on-line publication was 103 days. In 2014 the collaboration with the working groups from the Internal Medicine Spanish Foundation (FEMI) has reported 11 published manuscripts. In July 2014 we were informed that the Journal Citation Reports gave Rev Clin Esp an Impact Factor of 1,314 (year 2013). This Impact Factor without self-citations would have been 0.705 (in 2009 the global impact factor was 0,584). With the Editorial Committee farewell we welcome the new editorial team and we sincerely thank the SEMI Steering Committee, our colleagues, journal officers, reviewers, readers and authors that since 2009 have trusted on our editorial work. Copyright © 2014 Elsevier España, S.L.U. All rights reserved.

Interaction, 1996-1997.

ERIC Educational Resources Information Center

Hajdu-Vaughn, Susan, Ed.; Coyle, Barbara, Ed.

1997-01-01

This collection includes four quarterly issues of "Interaction," a publication of the Canadian Child Care Federation. Each issue addresses several topics and is arranged in four sections: opinions, practice/pratique, focus/a propos, and news/nouvelles. The opinions section includes letters and editorial/review columns, the practice…

The Practitioner's Corner: Special Editorial Announcement.

ERIC Educational Resources Information Center

Annunziata, Joyce

2000-01-01

The "Journal of Personnel Evaluation in Education" announces the establishment of a new section, "The Practitioner's Corner," a section that will provide the opportunity for practitioners from many educational environments to share information about issues, controversies, and programs in personnel evaluation that reflect practice. (SLD)

40 CFR 52.1605 - EPA-approved New Jersey regulations.

Code of Federal Regulations, 2013 CFR

2013-07-01

... Vehicles” On September 15, 1997, section 14.2 was re-numbered to 14.6. The State did not submit this change... appears in the Finding Aids section of the printed volume and at www.fdsys.gov. Editorial Note: At 72 FR...

Recent Advances in Cyclodextrin-Based Light-Responsive Supramolecular Systems.

PubMed

Zhang, Xiaojin; Ma, Xin; Wang, Kang; Lin, Shijun; Zhu, Shitai; Dai, Yu; Xia, Fan

2018-06-01

Cyclodextrins (CDs), one of the host molecules in supramolecular chemistry, can host guest molecules to form inclusion complexes via non-covalent and reversible host-guest interactions. CD-based light-responsive supramolecular systems are typically constructed using CDs and guest molecules with light-responsive moieties, including azobenzene, arylazopyrazole, o-nitrobenzyl ester, pyrenylmethyl ester, coumarin, and anthracene. To date, numerous efforts have been reported on the topic of CD-based light-responsive supramolecular systems, but these have not yet been highlighted in a separated review. This review summarizes the efforts reported over the past ten years. The main text of this review is divided into five sections (vesicles, micelles, gels, capturers, and nanovalves) according to the formation of self-assemblies. This feature article aims to afford a comprehensive understanding of the light-responsive moieties used in the construction of CD-based light-responsive supramolecular systems and to provide a helpful guide for the further design of CD-based light-responsive supramolecular systems. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Equilibrium isotope effects on noncovalent interactions in a supramolecular host-guest system.

PubMed

Mugridge, Jeffrey S; Bergman, Robert G; Raymond, Kenneth N

2012-02-01

The self-assembled supramolecular complex [Ga(4)L(6)](12-) (1; L = 1,5-bis[2,3-dihydroxybenzamido]naphthalene) can act as a molecular host in aqueous solution and bind cationic guest molecules to its highly charged exterior surface or within its hydrophobic interior cavity. The distinct internal cavity of host 1 modifies the physical properties and reactivity of bound guest molecules and can be used to catalyze a variety of chemical transformations. Noncovalent host-guest interactions in large part control guest binding, molecular recognition and the chemical reactivity of bound guests. Herein we examine equilibrium isotope effects (EIEs) on both exterior and interior guest binding to host 1 and use these effects to probe the details of noncovalent host-guest interactions. For both interior and exterior binding of a benzylphosphonium guest in aqueous solution, protiated guests are found to bind more strongly to host 1 (K(H)/K(D) > 1) and the preferred association of protiated guests is driven by enthalpy and opposed by entropy. Deuteration of guest methyl and benzyl C-H bonds results in a larger EIE than deuteration of guest aromatic C-H bonds. The observed EIEs can be well explained by considering changes in guest vibrational force constants and zero-point energies. DFT calculations further confirm the origins of these EIEs and suggest that changes in low-frequency guest C-H/D vibrational motions (bends, wags, etc.) are primarily responsible for the observed EIEs. © 2011 American Chemical Society

A Project-Based Cornerstone Course in Civil Engineering: Student Perceptions and Identity Development

ERIC Educational Resources Information Center

Marshall, Jill; Bhasin, Amit; Boyles, Stephen; David, Bernard; James, Rachel; Patrick, Anita

2018-01-01

Our study used a natural experiment to compare a project-based cornerstone course with the traditionally-taught introductory course in civil engineering. During the study, two sections of the course were organized around an overarching project, the design of an event center, and the remaining sections used guest lectures, a textbook, and…

Effect of guest drug character encapsulated in the cavity and intermolecular spaces of γ-cyclodextrins on the dissolution property of ternary γ-cyclodextrin complex.

PubMed

Liu, Nan; Higashi, Kenjirou; Ueda, Keisuke; Moribe, Kunikazu

2017-10-15

Various ternary Guest 2/(Guest 1/γ-cyclodextrin (CD)) complexes were prepared using a cogrinding and subsequent heating method, wherein Guest 1 was incorporated in the cavity of γ-CD and Guest 2 was incorporated into the intermolecular spaces between γ-CD columns. Dissolution fluxes of Guest 1 and Guest 2 from all ternary complexes were almost identical. The dissolution flux of flurbiprofen (Guest 1) from the ternary complexes depended on the solubility of Guest 2 drugs (naproxen

Simulation optimization of spherical non-polar guest recognition by deep-cavity cavitands

PubMed Central

Wanjari, Piyush P.; Gibb, Bruce C.; Ashbaugh, Henry S.

2013-01-01

Biomimetic deep-cavity cavitand hosts possess unique recognition and encapsulation properties that make them capable of selectively binding a range of non-polar guests within their hydrophobic pocket. Adamantane based derivatives which snuggly fit within the pocket of octa-acid deep cavity cavitands exhibit some of the strongest host binding. Here we explore the roles of guest size and attractiveness on optimizing guest binding to form 1:1 complexes with octa-acid cavitands in water. Specifically we simulate the water-mediated interactions of the cavitand with adamantane and a range of simple Lennard-Jones guests of varying diameter and attractive well-depth. Initial simulations performed with methane indicate hydrated methanes preferentially reside within the host pocket, although these guests frequently trade places with water and other methanes in bulk solution. The interaction strength of hydrophobic guests increases with increasing size from sizes slightly smaller than methane to Lennard-Jones guests comparable in size to adamantane. Over this guest size range the preferential guest binding location migrates from the bottom of the host pocket upwards. For guests larger than adamantane, however, binding becomes less favorable as the minimum in the potential-of-mean force shifts to the cavitand face around the portal. For a fixed guest diameter, the Lennard-Jones well-depth is found to systematically shift the guest-host potential-of-mean force to lower free energies, however, the optimal guest size is found to be insensitive to increasing well-depth. Ultimately our simulations show that adamantane lies within the optimal range of guest sizes with significant attractive interactions to match the most tightly bound Lennard-Jones guests studied. PMID:24359375

Healthcare reform in the Middle East and the USA.

PubMed

Younis, Mustafa Z

2017-01-01

Mustafa Z Younis speaks to Laura Dormer, Commissioning Editor: Dr Mustafa Z Younis is an internationally recognized scholar and was a member of the Executive Committee of the International Society for Research of Healthcare Financial Management. Dr Younis has authored and published over 200 articles, abstracts and presentations in refereed journals and meetings, and has presented at national and international conferences. Dr Younis has administrative experience as Senior Adviser for the President at Zirve University, Turkey and as Chair of the Department of Health Policy and Management at Florida International University (FL, USA) where he led the accreditation efforts for the Healthcare Management Program. Dr Younis has a history of playing visible roles on the editorial boards of journals as Chief Editor, Guest Editor and Editorial board member of leading journals such as Journal of International Medical Research, Journal of Health Care Finance, Inquiry, Journal of Health and Human Services Administration, Journal of Public Budgeting, Accounting and Financial Management. Dr Younis is a frequent speaker for both academic and professional audiences. His talks often feature his latest research and work in progress as well as cross-industry trends and strategy implications. He has provided workshops and presentation for wide organizations. His research and findings applied to for-profit, non-profit settings, and government. Dr Younis has consulted with several organizations on healthcare finance, and economics. Dr Younis is often invited to speak about the challenges in the healthcare industry and other related topics to health economics, finance, and research. He has presented topics such as, healthcare reform, ownership structure, profitability, unit cost, payment system and efficiency in management, at a variety of forums and conferences in Europe, Asia and Middle East.

Twenty-five years of sport performance research in the Journal of Sports Sciences.

PubMed

Nevill, Alan; Atkinson, Greg; Hughes, Mike

2008-02-15

In this historical review covering the past 25 years, we reflect on the content of manuscripts relevant to the Sport Performance section of the Journal of Sports Sciences. Due to the wide diversity of sport performance research, the remit of the Sport Performance section has been broad and includes mathematical and statistical evaluation of competitive sports performances, match- and notation-analysis, talent identification, training and selection or team organization. In addition, due to the academic interests of its section editors, they adopted a quality-assurance role for the Sport Performance section, invariably communicated through key editorials that subsequently shaped the editorial policy of the Journal. Key high-impact manuscripts are discussed, providing readers with some insight into what might lead an article to become a citation "classic". Finally, landmark articles in the areas of "science and football" and "notation analysis" are highlighted, providing further insight into how such articles have contributed to the development of sport performance research in general and the Journal of Sports Sciences in particular.

The status of online Mendelian inheritance in man (OMIM) medio 1994.

PubMed Central

Pearson, P; Francomano, C; Foster, P; Bocchini, C; Li, P; McKusick, V

1994-01-01

During the last year many changes have been introduced into the system of maintaining OMIM. There are three major components of the reorganization. First, a distributed editorial system was introduced which provides a three-tiered editorial board with senior editors, science writers and subject editors. Second, MIM entries have been restructured to provide separate gene and phenotype information and to organize them into separate catalogs. The restructuring also establishes clearly defined sections for entering new information, converts old entries to the new structure, and establishes a file maintenance and editorial system in SGML format. Third, the entry numbering and naming system has been modified. In addition, the information has been made available through a variety of output media, including books, CD-ROM and online access based on the IRx, WAIS, Gopher and WWW formats. PMID:7937048

28 CFR 0.1 - Organizational units.

Code of Federal Regulations, 2013 CFR

2013-07-01

...) United States Marshals Service. Bureau of Alcohol, Tobacco, Firearms, and Explosives Boards Board of... 43702, June 30, 1980] Editorial Note: For Federal Register citations affecting § 0.1, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www...

24 CFR 882.102 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-04-01

... SUPPORTIVE HOUSING FOR THE ELDERLY PROGRAM AND SECTION 811 SUPPORTIVE HOUSING FOR PERSONS WITH DISABILITIES...: 1937 Act, covered person, drug, drug-related criminal activity, federally assisted housing, guest... violent criminal activity. (b) In addition, the following definitions apply to this part: ACC reserve...

28 CFR 551.34 - Organization activities.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 28 Judicial Administration 2 2011-07-01 2011-07-01 false Organization activities. 551.34 Section 551.34 Judicial Administration BUREAU OF PRISONS, DEPARTMENT OF JUSTICE INSTITUTIONAL MANAGEMENT..., but are not limited to, meetings, guest speakers, sports competitions, banquets, or community programs...

28 CFR 551.34 - Organization activities.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 28 Judicial Administration 2 2014-07-01 2014-07-01 false Organization activities. 551.34 Section 551.34 Judicial Administration BUREAU OF PRISONS, DEPARTMENT OF JUSTICE INSTITUTIONAL MANAGEMENT..., but are not limited to, meetings, guest speakers, sports competitions, banquets, or community programs...

28 CFR 551.34 - Organization activities.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 28 Judicial Administration 2 2012-07-01 2012-07-01 false Organization activities. 551.34 Section 551.34 Judicial Administration BUREAU OF PRISONS, DEPARTMENT OF JUSTICE INSTITUTIONAL MANAGEMENT..., but are not limited to, meetings, guest speakers, sports competitions, banquets, or community programs...

28 CFR 551.34 - Organization activities.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 28 Judicial Administration 2 2013-07-01 2013-07-01 false Organization activities. 551.34 Section 551.34 Judicial Administration BUREAU OF PRISONS, DEPARTMENT OF JUSTICE INSTITUTIONAL MANAGEMENT..., but are not limited to, meetings, guest speakers, sports competitions, banquets, or community programs...

Astrobee Guest Science Guide

NASA Technical Reports Server (NTRS)

Benavides, Jose; Smith, Marion F; Wheeler, Dawn; Fluckiger, Lorenzo

2017-01-01

The Astrobee Research Facility will maintain three identical free-flying Astrobee robots on the ISS. After the Astrobees are launched and commissioned in 2018, they will replace the SPHERES robots that have been operating on the ISS since 2006 (Fig. 2). Over the years, the SPHERES have been among the most-used payloads on the ISS, supporting dozens of experiments from a variety of guest scientists. In the next section, we'll talk about past SPHERES experiments as possible inspiration for your future research on Astrobee. Compared to SPHERES, the Astrobee robots will offer many new capabilities and will require less astronaut time to support, so we hope the new facility will be able to fly experiments much more often.

"USA Today": Comparative Analysis with Two National and Two Los Angeles Daily Newspapers. Research Bulletin.

ERIC Educational Resources Information Center

Ames, Steve; And Others

Sections of the newspaper "USA Today" were compared with corresponding sections of four major newspapers--the "New York Times," the "Wall Street Journal," the "Los Angeles Herald Examiner," and the "Los Angeles Times"--to determine what editorial components made "USA Today" different and…

78 FR 60745 - Hazardous Materials: Minor Editorial Corrections and Clarifications (RRR)

Federal Register 2010, 2011, 2012, 2013, 2014

2013-10-02

... 173.62 This section provides packaging instructions for Class 1 explosive materials. Paragraph (b) of... requirements for approval of special form Class 7 (radioactive) materials. Paragraph (d) of this section notes... activity of special form Class 7 (radioactive) material permitted in a Type A package equals the maximum...

Incorporation of large guest molecules into liposomes via chemical reactions in lipid membranes.

PubMed

Tsuchiya, Yuki; Sugikawa, Kouta; Ueda, Masafumi; Ikeda, Atsushi

2017-02-22

The incorporation of hydrophobic guest molecules into lipid membranes by the exchange of the guest molecule from a cyclodextrin (CDx) complex to a liposome is limited to guest molecules that can be included in CDxs. To solve this problem, large guest molecules were incorporated into liposomes by chemical reactions of guest molecules in lipid membranes. Stable lipid-membrane-incorporated fullerene derivatives with large substituent(s) were prepared by Diels-Alder reactions in lipid membranes.

Double level selection in a constitutional dynamic library of coordination driven supramolecular polygons.

PubMed

Rancan, Marzio; Tessarolo, Jacopo; Casarin, Maurizio; Zanonato, Pier Luigi; Quici, Silvio; Armelao, Lidia

2014-07-21

A constitutional dynamic library (CDL) of Cu(II) metallo-supramolecular polygons has been studied as a bench test to examine an interesting selection case based on molecular recognition. Sorting of the CDL polygons is achieved through a proper guest that is hosted into the triangular metallo-macrocycle constituent. Two selection mechanisms are observed, a guest induced path and a guest templated self-assembly (virtual library approach). Remarkably, the triangular host can accommodate several guests with a degree of selectivity ranging from ∼1 to ∼10(4) for all possible guest pairs. A double level selection operates: guests drive the CDL toward the triangular polygon, and, at the same time, this is able to pick a specific guest from a set of competitive molecules, according to a selectivity-affinity correlation. Association constants of the host-guest systems have been determined. Guest competition and exchange studies have been analyzed through variable temperature UV-Vis absorption spectroscopy and single crystal X-ray diffraction studies. Molecular structures and electronic properties of the triangular polygon and of the host-guest systems also have been studied by means of all electrons density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations including dispersive contributions. DFT outcomes ultimately indicate the dispersive nature of the host-guest interactions, while TDDFT results allow a thorough assignment of the host and host-guests spectral features.

Environment-Dependent Guest Exchange in Supramolecular Hosts

PubMed Central

2015-01-01

Dynamic exchange of guest molecules, encapsulated in host assemblies, is a phenomenon in supramolecular chemistry that has important implications in several applications. While the mechanism of exchange in micellar assemblies has been previously investigated, the effect of host and guest environment upon the guest-exchange dynamics has received little attention, if any. In this paper, we study the guest-exchange mechanism in pH-sensitive nanogels along with pH-insensitive nanogels as a control. By systematically comparing the behavior of these nanogels, we show that size, concentration, and hydrophobicity can all play a critical role in guest-exchange dynamics. More importantly, these studies reveal that the dominant mechanism of guest exchange can intimately depend on environmental factors. PMID:25244305

Responsive Guest Encapsulation of Dynamic Conjugated Microporous Polymers.

PubMed

Xu, Lai; Li, Youyong

2016-06-30

The host-guest complexes of conjugated microporous polymers encapsulating C60 and dye molecules have been investigated systematically. The orientation of guest molecules inside the cavities, have different terms: inside the open cavities of the polymer, or inside the cavities formed by packing different polymers. The host backbone shows responsive dynamic behavior in order to accommodate the size and shape of incoming guest molecule or guest aggregates. Simulations show that the host-guest binding of conjugated polymers is stronger than that of non-conjugated polymers. This detailed study could provide a clear picture for the host-guest interaction for dynamic conjugated microporous polymers. The mechanism obtained could guide designing new conjugated microporous polymers.

Conflict of interest policies and disclosure requirements among European Society of Cardiology National Cardiovascular Journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-06-01

Disclosure of potential conflicts of interest (COI) is used by biomedical journals to guarantee credibility and transparency of the scientific process. COI disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This paper provides a comprehensive editorial perspective on classical COI-related issues. New insights into current COI policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardised questionnaire, are discussed.

Conflict of interest policies and disclosure requirements among European Society of Cardiology national cardiovascular journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-01-01

Disclosure of potential conflicts of interest (COI) is used by biomedical journals to guarantee the credibility and transparency of the scientific process. COI disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This paper provides a comprehensive editorial perspective on classical COI-related issues. New insights into current COI policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardised questionnaire, are discussed.

Conflicts of interest policies and disclosure requirements among European Society of Cardiology national cardiovascular journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-06-01

Disclosure of potential conflicts of interest (COI) is used by biomedical journals to guarantee credibility and transparency of the scientific process. COI disclosure, however, is neither systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This article provides a comprehensive editorial perspective on classical COI-related issues. New insights into current COI policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardized questionnaire, are discussed.

Conflict of interest policies and disclosure requirements among European Society of Cardiology National Cardiovascular Journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-04-01

Disclosure of potential conflicts of interest (COI) is used by biomedical journals to guarantee credibility and transparency of the scientific process. COI disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This paper provides a comprehensive editorial perspective on classical COI-related issues. New insights into current COI policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardised questionnaire, are discussed.

Conflict of interest policies and disclosure requirements among European Society of Cardiology National Cardiovascular Journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-03-01

Disclosure of potential conflicts of interest (COIs) is used by biomedical journals to guarantee credibility and transparency of the scientific process. Conflict of interest disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This paper provides a comprehensive editorial perspective on classical COI-related issues. New insights into the current COI policies and practices among European Society of Cardiology National Cardiovascular Journals, as derived from a cross-sectional survey using a standardized questionnaire, are discussed.

[Conflict of interest policies and disclosure requirements among European Society of Cardiology National Cardiovascular Journals].

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-04-01

Disclosure of potential conflicts of interest (COI) is used by biomedical journals to guarantee credibility and transparency of the scientific process. COI disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This paper provides a comprehensive editorial perspective on classical COI-related issues. New insights into current COI policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardised questionnaire, are discussed.

Conflict of interest policies and disclosure requirements among European Society of Cardiology National Cardiovascular Journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-01-01

Disclosure of potential conflicts of interest (COI) is used by biomedical journals to guarantee credibility and transparency of the scientific process. COI disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This paper provides a comprehensive editorial perspective on classical COI-related issues. New insights into current COI policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardised questionnaire, are discussed.

27 CFR 26.261 - Action by district director of customs.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Action by district director of customs. 26.261 Section 26.261 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX..., 1975] Editorial Note: For Federal Register citations affecting § 26.261, see the List of CFR Sections...

27 CFR 26.261 - Action by district director of customs.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2011-04-01 2011-04-01 false Action by district director of customs. 26.261 Section 26.261 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX..., 1975] Editorial Note: For Federal Register citations affecting § 26.261, see the List of CFR Sections...

27 CFR 26.261 - Action by district director of customs.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2012-04-01 2012-04-01 false Action by district director of customs. 26.261 Section 26.261 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX..., 1975] Editorial Note: For Federal Register citations affecting § 26.261, see the List of CFR Sections...

Electronegative Guests in CoSb 3

DOE PAGES

Duan, Bo; Yang, Jiong; Salvador, James R.; ...

2016-04-19

Introducing guests into a host framework to form a so called inclusion compound can be used to design materials with new and fascinating functionalities. The vast majority of inclusion compounds have electropositive guests with neutral or negatively charged frameworks. Here, we show a series of electronegative guest filled skutterudites with inverse polarity. The strong covalent guest-host interactions observed for the electronegative group VIA guests, i.e., S and Se, feature a unique localized cluster vibration which significantly influences the lattice dynamics, together with the point-defect scattering caused by element substitutions, resulting in very low lattice thermal conductivity values. The findings ofmore » electronegative guests provide a new perspective for guest-filling in skutterudites, and the covalent filler/lattice interactions lead to an unusual lattice dynamics phenomenon which can be used for designing high-efficiency thermoelectric materials and novel functional inclusion compounds with open structures.« less

Methods for associating or dissociating guest materials with a metal organic framework, systems for associating or dissociating guest materials within a series of metal organic frameworks, thermal energy transfer assemblies, and methods for transferring thermal energy

DOEpatents

McGrail, B. Peter; Brown, Daryl R.; Thallapally, Praveen K.

2016-08-02

Methods for releasing associated guest materials from a metal organic framework are provided. Methods for associating guest materials with a metal organic framework are also provided. Methods are provided for selectively associating or dissociating guest materials with a metal organic framework. Systems for associating or dissociating guest materials within a series of metal organic frameworks are provided. Thermal energy transfer assemblies are provided. Methods for transferring thermal energy are also provided.

Methods for associating or dissociating guest materials with a metal organic framework, systems for associating or dissociating guest materials within a series of metal organic frameworks, thermal energy transfer assemblies, and methods for transferring thermal energy

DOEpatents

McGrail, B. Peter; Brown, Daryl R.; Thallapally, Praveen K.

2014-08-05

Methods for releasing associated guest materials from a metal organic framework are provided. Methods for associating guest materials with a metal organic framework are also provided. Methods are provided for selectively associating or dissociating guest materials with a metal organic framework. Systems for associating or dissociating guest materials within a series of metal organic frameworks are provided. Thermal energy transfer assemblies are provided. Methods for transferring thermal energy are also provided.

Quantitative analysis of the guest-concentration dependence of the mobility in a disordered fluorene-arylamine host-guest system in the guest-to-guest regime

NASA Astrophysics Data System (ADS)

Nicolai, H. T.; Hof, A. J.; Lu, M.; Blom, P. W. M.; de Vries, R. J.; Coehoorn, R.

2011-11-01

The charge transport in a polyspirobifluorene derivative with copolymerized N,N,N',N'-tetraaryldiamino biphenyl (TAD) hole transport units is investigated as a function of the TAD content. For TAD concentrations larger than 5%, guest-to-guest transport is observed. It is demonstrated that in this regime the charge carrier density dependent mobility can be described consistently with the extended Gaussian disorder model, with a density of hopping sites which is proportional to the TAD concentration and comparable to the molecular density.

50 CFR 20.104 - Seasons, limits, and shooting hours for rails, woodcock, and common (Wilson's) snipe.

Code of Federal Regulations, 2012 CFR

2012-10-01

... FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION, TRANSPORTATION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

50 CFR 20.104 - Seasons, limits, and shooting hours for rails, woodcock, and common (Wilson's) snipe.

Code of Federal Regulations, 2013 CFR

2013-10-01

... FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION, TRANSPORTATION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

50 CFR 20.104 - Seasons, limits, and shooting hours for rails, woodcock, and common (Wilson's) snipe.

Code of Federal Regulations, 2011 CFR

2011-10-01

... FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION, TRANSPORTATION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

50 CFR 20.104 - Seasons, limits, and shooting hours for rails, woodcock, and common (Wilson's) snipe.

Code of Federal Regulations, 2014 CFR

2014-10-01

... FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION, TRANSPORTATION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

EDITORIAL: Special section: Selected papers from the Second European Workshop on Monte Carlo Treatment Planning (MCTP2009) Special section: Selected papers from the Second European Workshop on Monte Carlo Treatment Planning (MCTP2009)

NASA Astrophysics Data System (ADS)

Spezi, Emiliano

2010-08-01

Sixty years after the paper 'The Monte Carlo method' by N Metropolis and S Ulam in The Journal of the American Statistical Association (Metropolis and Ulam 1949), use of the most accurate algorithm for computer modelling of radiotherapy linear accelerators, radiation detectors and three dimensional patient dose was discussed in Wales (UK). The Second European Workshop on Monte Carlo Treatment Planning (MCTP2009) was held at the National Museum of Wales in Cardiff. The event, organized by Velindre NHS Trust, Cardiff University and Cancer Research Wales, lasted two and a half days, during which leading experts and contributing authors presented and discussed the latest advances in the field of Monte Carlo treatment planning (MCTP). MCTP2009 was highly successful, judging from the number of participants which was in excess of 140. Of the attendees, 24% came from the UK, 46% from the rest of Europe, 12% from North America and 18% from the rest of the World. Fifty-three oral presentations and 24 posters were delivered in a total of 12 scientific sessions. MCTP2009 follows the success of previous similar initiatives (Verhaegen and Seuntjens 2005, Reynaert 2007, Verhaegen and Seuntjens 2008), and confirms the high level of interest in Monte Carlo technology for radiotherapy treatment planning. The 13 articles selected for this special section (following Physics in Medicine and Biology's usual rigorous peer-review procedure) give a good picture of the high quality of the work presented at MCTP2009. The book of abstracts can be downloaded from http://www.mctp2009.org. I wish to thank the IOP Medical Physics and Computational Physics Groups for their financial support, Elekta Ltd and Dosisoft for sponsoring MCTP2009, and leading manufacturers such as BrainLab, Nucletron and Varian for showcasing their latest MC-based radiotherapy solutions during a dedicated technical session. I am also very grateful to the eight invited speakers who kindly accepted to give keynote presentations which contributed significantly to raising the quality of the event and capturing the interest of the medical physics community. I also wish to thank all those who contributed to the success of MCTP2009: the members of the local Organizing Committee and the Workshop Management Team who managed the event very efficiently, the members of the European Working Group in Monte Carlo Treatment Planning (EWG-MCTP) who acted as Guest Associate Editors for the MCTP2009 abstracts reviewing process, and all the authors who generated new, high quality work. Finally, I hope that you find the contents of this special section enjoyable and informative. Emiliano Spezi Chairman of MCTP2009 Organizing Committee and Guest Editor References Metropolis N and Ulam S 1949 The Monte Carlo method J. Amer. Stat. Assoc. 44 335-41 Reynaert N 2007 First European Workshop on Monte Carlo Treatment Planning J. Phys.: Conf. Ser. 74 011001 Verhaegen F and Seuntjens J 2005 International Workshop on Current Topics in Monte Carlo Treatment Planning Phys. Med. Biol. 50 Verhaegen F and Seuntjens J 2008 International Workshop on Monte Carlo Techniques in Radiotherapy Delivery and Verification J. Phys.: Conf. Ser. 102 011001

A molecular dynamics study of model SI clathrate hydrates: the effect of guest size and guest-water interaction on decomposition kinetics.

PubMed

Das, Subhadip; Baghel, Vikesh Singh; Roy, Sudip; Kumar, Rajnish

2015-04-14

One of the options suggested for methane recovery from natural gas hydrates is molecular replacement of methane by suitable guests like CO2 and N2. This approach has been found to be feasible through many experimental and molecular dynamics simulation studies. However, the long term stability of the resultant hydrate needs to be evaluated; the decomposition rate of these hydrates is expected to depend on the interaction between these guest and water molecules. In this work, molecular dynamics simulation has been performed to illustrate the effect of guest molecules with different sizes and interaction strengths with water on structure I (SI) hydrate decomposition and hence the stability. The van der Waals interaction between water of hydrate cages and guest molecules is defined by Lennard Jones potential parameters. A wide range of parameter spaces has been scanned by changing the guest molecules in the SI hydrate, which acts as a model gas for occupying the small and large cages of the SI hydrate. All atomistic simulation results show that the stability of the hydrate is sensitive to the size and interaction of the guest molecules with hydrate water. The increase in the interaction of guest molecules with water stabilizes the hydrate, which in turn shows a slower rate of hydrate decomposition. Similarly guest molecules with a reasonably small (similar to Helium) or large size increase the decomposition rate. The results were also analyzed by calculating the structural order parameter to understand the dynamics of crystal structure and correlated with the release rate of guest molecules from the solid hydrate phase. The results have been explained based on the calculation of potential energies felt by guest molecules in amorphous water, hydrate bulk and hydrate-water interface regions.

50 CFR 20.109 - Extended seasons, limits, and hours for taking migratory game birds by falconry.

Code of Federal Regulations, 2011 CFR

2011-10-01

... taking migratory game birds by falconry. 20.109 Section 20.109 Wildlife and Fisheries UNITED STATES FISH... taking migratory game birds by falconry. This section provides annual regulations by which falconers may take permitted migratory game birds. [44 FR 7148, Feb. 6, 1979] Editorial Note: For Federal Register...

50 CFR 20.109 - Extended seasons, limits, and hours for taking migratory game birds by falconry.

Code of Federal Regulations, 2012 CFR

2012-10-01

... taking migratory game birds by falconry. 20.109 Section 20.109 Wildlife and Fisheries UNITED STATES FISH... taking migratory game birds by falconry. This section provides annual regulations by which falconers may take permitted migratory game birds. [44 FR 7148, Feb. 6, 1979] Editorial Note: For Federal Register...

50 CFR 20.109 - Extended seasons, limits, and hours for taking migratory game birds by falconry.

Code of Federal Regulations, 2010 CFR

2010-10-01

... taking migratory game birds by falconry. 20.109 Section 20.109 Wildlife and Fisheries UNITED STATES FISH... taking migratory game birds by falconry. This section provides annual regulations by which falconers may take permitted migratory game birds. [44 FR 7148, Feb. 6, 1979] Editorial Note: For Federal Register...

50 CFR 20.109 - Extended seasons, limits, and hours for taking migratory game birds by falconry.

Code of Federal Regulations, 2014 CFR

2014-10-01

... taking migratory game birds by falconry. 20.109 Section 20.109 Wildlife and Fisheries UNITED STATES FISH... taking migratory game birds by falconry. This section provides annual regulations by which falconers may take permitted migratory game birds. [44 FR 7148, Feb. 6, 1979] Editorial Note: For Federal Register...

50 CFR 20.109 - Extended seasons, limits, and hours for taking migratory game birds by falconry.

Code of Federal Regulations, 2013 CFR

2013-10-01

... taking migratory game birds by falconry. 20.109 Section 20.109 Wildlife and Fisheries UNITED STATES FISH... taking migratory game birds by falconry. This section provides annual regulations by which falconers may take permitted migratory game birds. [44 FR 7148, Feb. 6, 1979] Editorial Note: For Federal Register...

Publishing a Newsletter for Education Associations. PR Bookshelf No. 5.

ERIC Educational Resources Information Center

National Education Association, Washington, DC.

This handbook for how to publish a newsletter for educational associations is divided into ten short sections. The sections discuss such topics as analyzing the audience, the makeup of the editorial board, what should go into a newsletter, ways to get the news, aids for the editor, writing simply and clearly, planning layout, printing, following…

27 CFR 26.116 - Issuance of permit, Form 487B, and customs inspection.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2011-04-01 2011-04-01 false Issuance of permit, Form 487B, and customs inspection. 26.116 Section 26.116 Alcohol, Tobacco Products and Firearms ALCOHOL AND..., 1975] Editorial Note: For Federal Register citations affecting § 26.116, see the List of CFR Sections...

27 CFR 26.116 - Issuance of permit, Form 487B, and customs inspection.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2012-04-01 2012-04-01 false Issuance of permit, Form 487B, and customs inspection. 26.116 Section 26.116 Alcohol, Tobacco Products and Firearms ALCOHOL AND..., 1975] Editorial Note: For Federal Register citations affecting § 26.116, see the List of CFR Sections...

Educating for Political Activity: A Younger Generational Response

ERIC Educational Resources Information Center

Mac an Ghaill, Mairtin

2010-01-01

This paper is a response to Professor Chitty's "Educational Review" Guest Lecture article, "Educating for political activity". I address the three sections of his paper: a global and national-based politics of war, corporate manipulation and parliamentary scandals. This provides a basis to draw upon empirical material from a…

Review of Journal of Cardiovascular Magnetic Resonance (JCMR) 2015-2016 and transition of the JCMR office to Boston.

PubMed

Manning, Warren J

2017-12-28

The Journal of Cardiovascular Magnetic Resonance (JCMR) is the official publication of the Society for Cardiovascular Magnetic Resonance (SCMR). In 2016, the JCMR published 93 manuscripts, including 80 research papers, 6 reviews, 5 technical notes, 1 protocol, and 1 case report. The number of manuscripts published was similar to 2015 though with a 12% increase in manuscript submissions to an all-time high of 369. This reflects a decrease in the overall acceptance rate to <25% (excluding solicited reviews). The quality of submissions to JCMR continues to be high. The 2016 JCMR Impact Factor (which is published in June 2016 by Thomson Reuters) was steady at 5.601 (vs. 5.71 for 2015; as published in June 2016), which is the second highest impact factor ever recorded for JCMR. The 2016 impact factor means that the JCMR papers that were published in 2014 and 2015 were on-average cited 5.71 times in 2016.In accordance with Open-Access publishing of Biomed Central, the JCMR articles are published on-line in the order that they are accepted with no collating of the articles into sections or special thematic issues. For this reason, over the years, the Editors have felt that it is useful to annually summarize the publications into broad areas of interest or themes, so that readers can view areas of interest in a single article in relation to each other and other recent JCMR articles. The papers are presented in broad themes with previously published JCMR papers to guide continuity of thought in the journal. In addition, I have elected to open this publication with information for the readership regarding the transition of the JCMR editorial office to the Beth Israel Deaconess Medical Center, Boston and the editorial process.Though there is an author publication charge (APC) associated with open-access to cover the publisher's expenses, this format provides a much wider distribution/availability of the author's work and greater manuscript citation. For SCMR members, there is a substantial discount in the APC. I hope that you will continue to send your high quality manuscripts to JCMR for consideration. Importantly, I also ask that you consider referencing recent JCMR publications in your submissions to the JCMR and elsewhere as these contribute to our impact factor. I also thank our dedicated Associate Editors, Guest Editors, and reviewers for their many efforts to ensure that the review process occurs in a timely and responsible manner and that the JCMR continues to be recognized as the leading publication in our field.

Binding of chemical warfare agent simulants as guests in a coordination cage: contributions to binding and a fluorescence-based response.

PubMed

Taylor, Christopher G P; Piper, Jerico R; Ward, Michael D

2016-05-07

Cubic coordination cages act as competent hosts for several alkyl phosphonates used as chemical warfare agent simulants; a range of cage/guest structures have been determined, contributions to guest binding analysed, and a fluorescent response to guest binding demonstrated.

50 CFR 20.103 - Seasons, limits, and shooting hours for mourning and white-winged doves and wild pigeons.

Code of Federal Regulations, 2014 CFR

2014-10-01

... STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

50 CFR 20.103 - Seasons, limits, and shooting hours for mourning and white-winged doves and wild pigeons.

Code of Federal Regulations, 2013 CFR

2013-10-01

... STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

50 CFR 20.103 - Seasons, limits, and shooting hours for mourning and white-winged doves and wild pigeons.

Code of Federal Regulations, 2012 CFR

2012-10-01

... STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

50 CFR 20.103 - Seasons, limits, and shooting hours for mourning and white-winged doves and wild pigeons.

Code of Federal Regulations, 2011 CFR

2011-10-01

... STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) TAKING, POSSESSION...] Editorial Note: For Federal Register citations affecting annual regulatory schedules for this section, see...

Conflict of interest policies and disclosure requirements among European Society of Cardiology National Cardiovascular Journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-05-01

Disclosure of potential conflicts of interest is used by biomedical journals to guarantee credibility and transparency of the scientific process. Conflict of interest disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for conflicts of interest disclosure. This paper provides a comprehensive editorial perspective on classical conflict of interest-related issues. New insights into current conflicts of interest policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardised questionnaire, are discussed. Copyright © 2012. Published by Elsevier Espana.

Conflict of interest policies and disclosure requirements among European Society of Cardiology National Cardiovascular Journals.

PubMed

Alfonso, Fernando; Timmis, Adam; Pinto, Fausto J; Ambrosio, Giuseppe; Ector, Hugo; Kulakowski, Piotr; Vardas, Panos

2012-04-01

Disclosure of potential conflicts of interest (COI) is used by biomedical journals to guarantee credibility and transparency of the scientific process. Conflict of interest disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for COI disclosure. This paper provides a comprehensive editorial perspective on classical COI-related issues. New insights into the current COI policies and practices among European Society of Cardiology National Cardiovascular Journals, as derived from a cross-sectional survey using a standardised questionnaire, are discussed. Copyright © 2012. Published by Elsevier España.

Aniline-containing guests recognized by α,α',δ,δ'-tetramethyl-cucurbit[6]uril host.

PubMed

Lin, Rui-Lian; Fang, Guo-Sheng; Sun, Wen-Qi; Liu, Jing-Xin

2016-12-13

The host-guest complexation of symmetrical α,α',δ,δ'-tetramethyl-cucurbit[6]uril (TMeQ[6]) and cucurbit[7]uril (Q[7]) with a series of aniline-containing guests has been investigated by various experimental techniques including NMR, ITC, and X-ray crystallography. Experimental results indicate that both TMeQ[6] and Q[7] hosts can encapsulate aniline-containing guests to form stable inclusion complexes. However, the oval cavity of TMeQ[6] is more complementary in size and shape to the aromatic ring of the guests than the spherical cavity of Q[7]. Shielding and deshielding effects of the aromatic ring on guests lead to the remarkable chemical shifts of the TMeQ[6] host protons. The rotational restriction of the guests in the oval cavity of TMeQ[6] results in the large negative values of entropy. The X-ray crystal structure of the 1:1 inclusion complex between TMeQ[6] and N,N'-diethyl-benzene-1,4-diamine unambiguously reveals that the aromatic ring of the guest resides in the oval cavity of TMeQ[6].

Nurses as 'guests'--a study of a concept in light of Jacques Derrida's philosophy of hospitality.

PubMed

Oresland, Stina; Lutzén, Kim; Norberg, Astrid; Rasmussen, Birgit H; Määttä, Sylvia

2013-04-01

As revealed in previous empirical research, nurses describe their position in home-based nursing care (HBNC) as that of 'guests' in the patient's home. Such a description is problematic as 'guests' might not be considered to belong to the realm of professionalism. As Jacques Derrida's work on hospitality has received wide publicity, sparking theoretical and philosophical discussion about host and guest, the aim of this study was to explore how the concept 'guests' can be understood in the light of Derrida's philosophy of hospitality. The study revealed that (a) guest must be considered a binary concept; and (b) hospitality should be regarded as an exchange of giving and receiving between a host and a guest. The present study demonstrated that it is important to reflect on the meaning of the concepts used by nurses in HBNC. Further theoretical and empirical exploration of the concept 'hospitality' would be fruitful, i.e. what is patients' understanding of 'hospitality' and 'hostility' related to nurses' descriptions of themselves as 'guests' in the patient's home. © 2013 Blackwell Publishing Ltd.

PPII propensity of multiple-guest amino acids in a proline-rich environment.

PubMed

Moradi, Mahmoud; Babin, Volodymyr; Sagui, Celeste; Roland, Christopher

2011-07-07

There has been considerable debate about the intrinsic PPII propensity of amino acid residues in denatured polypeptides. Experimentally, this scale is based on the behavior of guest amino acid residues placed in the middle of proline-based hosts. We have used classical molecular dynamics simulations combined with replica-exchange methods to carry out a comprehensive analysis of the conformational equilibria of proline-based host oligopeptides with multiple guest amino acids including alanine, glutamine, valine, and asparagine. The tracked structural characteristics include the secondary structural motifs based on the Ramachandran angles and the cis/trans isomerization of the prolyl bonds. In agreement with our recent study of single amino acid guests, we did not observe an intrinsic PPII propensity in any of the guest amino acids in a multiple-guest setting. Instead, the experimental results can be explained in terms of (i) the steric restrictions imposed on the C-terminal guest amino acid that is immediately followed by a proline residue and (ii) an increase in the trans content of the prolyl bonds due to the presence of guest residues. In terms of the latter, we found that the more guests added to the system, the larger the increase in the trans content of the prolyl bonds, which results in an effective increase in the PPII content of the peptide.

Nucleation pathways of clathrate hydrates: effect of guest size and solubility.

PubMed

Jacobson, Liam C; Hujo, Waldemar; Molinero, Valeria

2010-11-04

Understanding the microscopic mechanism of nucleation of clathrate hydrates is important for their use in hydrogen storage, CO(2) sequestration, storage and transport of natural gas, and the prevention of the formation of hydrate plugs in oil and gas pipelines. These applications involve hydrate guests of varied sizes and solubility in water that form different hydrate crystal structures. Nevertheless, molecular studies of the mechanism of nucleation of hydrates have focused on the single class of small hydrophobic guests that stabilize the sI crystal. In this work, we use molecular dynamics simulations with a very efficient coarse-grained model to elucidate the mechanisms of nucleation of clathrate hydrates of four model guests that span a 2 orders of magnitude range in solubility in water and that encompass sizes which stabilize each one a different hydrate structure (sI and sII, with and without occupancy of the dodecahedral cages). We find that the overall mechanism of clathrate nucleation is similar for all guests and involves a first step of formation of blobs, dense clusters of solvent-separated guest molecules that are the birthplace of the clathrate cages. Blobs of hydrophobic guests are rarer and longer-lived than those for soluble guests. For each guest, we find multiple competing channels to form the critical nuclei, filled dodecahedral (5(12)) cages, empty 5(12) cages, and a variety of filled large (5(12)6(n) with n = 2, 3, and 4) clathrate cages. Formation of empty dodecahedra is an important nucleation channel for all but the smallest guest. The empty 5(12) cages are stabilized by the presence of guests from the blob in their first solvation shell. Under conditions of high supercooling, the structure of the critical and subcritical nuclei is mainly determined by the size of the guest and does not reflect the cage composition or ordering of the stable or metastable clathrate crystals.

75 FR 53593 - Hazardous Materials: Minor Editorial Corrections and Clarifications

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-01

... transportation, Packaging and containers, Radioactive materials, Reporting and recordkeeping requirements... section specifies general requirements for packaging hazardous materials for transportation by aircraft... contamination on motor vehicles used to transport Class 7 radioactive materials under exclusive use conditions...

Supramolecular organic frameworks: engineering periodicity in water through host-guest chemistry.

PubMed

Tian, Jia; Chen, Lan; Zhang, Dan-Wei; Liu, Yi; Li, Zhan-Ting

2016-05-11

The development of homogeneous, water-soluble periodic self-assembled structures comprise repeating units that produce porosity in two-dimensional (2D) or three-dimensional (3D) spaces has become a topic of growing interest in the field of supramolecular chemistry. Such novel self-assembled entities, known as supramolecular organic frameworks (SOFs), are the result of programmed host-guest interactions, which allows for the thermodynamically controlled generation of monolayer sheets or a diamondoid architecture with regular internal cavities or pores under mild conditions. This feature article aims at propagating the conceptually novel SOFs as a new entry into conventional supramolecular polymers. In the first section, we will describe the background of porous solid frameworks and supramolecular polymers. We then introduce the self-assembling behaviour of several multitopic flexible molecules, which is closely related to the design of periodic SOFs from rigid multitopic building blocks. This is followed by a brief discussion of cucurbit[8]uril (CB[8])-encapsulation-enhanced aromatic stacking in water. The three-component host-guest pattern based on this stacking motif has been utilized to drive the formation of most of the new SOFs. In the following two sections, we will highlight the main advances in the construction of 2D and 3D SOFs and the related functional aspects. Finally, we will offer our opinions on future directions for both structures and functions. We hope that this article will trigger the interest of researchers in the field of chemistry, physics, biology and materials science, which should help accelerate the applications of this new family of soft self-assembled organic frameworks.

Focus on climate projections for adaptation strategies

NASA Astrophysics Data System (ADS)

Feijt, Arnout; Appenzeller, Christof; Siegmund, Peter; von Storch, Hans

2016-01-01

Most papers in this focus issue on ‘climate and climate impact projections for adaptation strategies’ are solicited by the guest editorial team and originate from a cluster of projects that were initiated 5 years ago. These projects aimed to provide climate change and climate change adaptation information for a wide range of societal areas for the lower parts of the deltas of the Rhine and Meuse rivers, and particularly for the Netherlands. The papers give an overview of our experiences, methods, approaches, results and surprises in the process to developing scientifically underpinned climate products and services for various clients. Although the literature on interactions between society and climate science has grown over the past decade both with respect to policy-science framing in post-normal science (Storch et al 2011 J. Environ. Law Policy 1 1-15, van der Sluijs 2012 Nature and Culture 7 174-195), user-science framing (Berkhout et al 2014 Regional Environ. Change 14 879-93) and joint knowledge production (Hegger et al 2014 Regional Environ. Change 14 1049-62), there is still a lot to gain. With this focus issue we want to contribute to best practices in this quickly moving field between science and society.

Second California Assessment: Integrated climate change impacts assessment of natural and managed systems. Guest editorial

USGS Publications Warehouse

Franco, G.; Cayan, D.R.; Moser, S.; Hanemann, M.; Jones, M.A.

2011-01-01

Since 2006 the scientific community in California, in cooperation with resource managers, has been conducting periodic statewide studies about the potential impacts of climate change on natural and managed systems. This Special Issue is a compilation of revised papers that originate from the most recent assessment that concluded in 2009. As with the 2006 studies that influenced the passage of California's landmark Global Warming Solutions Act (AB32), these papers have informed policy formulation at the state level, helping bring climate adaptation as a complementary measure to mitigation. We provide here a brief introduction to the papers included in this Special Issue focusing on how they are coordinated and support each other. We describe the common set of downscaled climate and sea-level rise scenarios used in this assessment that came from six different global climate models (GCMs) run under two greenhouse gas emissions scenarios: B1 (low emissions) and A2 (a medium-high emissions). Recommendations for future state assessments, some of which are being implemented in an on-going new assessment that will be completed in 2012, are offered. ?? 2011 Springer Science+Business Media B.V.

A Guide for Submissions to the "JEE" Content Section

ERIC Educational Resources Information Center

Holmes, Jessica; Rothschild, Casey; Setterfield, Mark

2009-01-01

The authors provide a guide to the thinking of the editorial collective for the Content section of the "Journal of Economic Education (JEE)". They discuss the type of papers they are looking for, what in their view constitutes a good paper, and how their review process works. They also provide some examples of what works (and what does not).…

Synthesis of Cyclic Porphyrin Trimers through Alkyne Metathesis Cyclooligomerization and Their Host–Guest Binding Study

DOE Office of Scientific and Technical Information (OSTI.GOV)

Yu, Chao; Long, Hai; Jin, Yinghua

2016-06-17

Cyclic porphyrin trimers were synthesized through one-step cyclooligomerization via alkyne metathesis from diyne monomers. These macrocycles show interesting host-guest binding interactions with fullerenes, selectively binding C70 (6 x 103 M-1) over C60 and C84 (no binding observed). The fullerene-encapsulated host-guest complex can undergo guest or host exchange in the presence of another guest (2,4,6-tri(4-pyridyl)-1,3,5-triazine) or host (cage COP5) molecule with higher binding affinity.

Hydrogen bonding assemblies in host guest complexes with 18-crown-6

NASA Astrophysics Data System (ADS)

Fonari, M. S.; Simonov, Yu. A.; Kravtsov, V. Ch.; Lipkowski, J.; Ganin, E. V.; Yavolovskii, A. A.

2003-02-01

Recent X-ray crystal structural data for two novel 1:2 host-guest complexes of 18-crown-6 with neutral organic molecules, thiaamide hydrazide of 2-aminobenzoic acid and thiaamide hydrazide of 4-amino-1,2,5-thiadiazole-3-carbonic acid are reported. The supramolecular structures of these two and five relative complexes are discussed from the point of view of participation of donor groups in coordination with the crown ether, and donor and acceptor groups in the self-assembly of the guest molecules. Guest molecules have incorporated amine and hydrazine moieties as proton donors and carbonyl oxygen and sulfur (in thiadiazole and in thiaamine moieties) as proton acceptors. The guest-guest interactions appeared to be crucial in the final architecture.

New Editors Appointed for Sections of Journal of Geophysical Research

NASA Astrophysics Data System (ADS)

2009-04-01

New editors have been appointed for the Atmospheres, Biogeosciences, and Oceans sections of the Journal of Geophysical Research (JGR). Joost de Gouw (NOAA, Boulder, Colo.) and Renyi Zhang (Texas A&M, College Station) are filling the vacancies of retiring Atmospheres section editors John Austin and Jose Fuentes. De Gouw and Zhang join the continuing editors Steven Ghan and Yinon Rudich. Sara Pryor (Indiana University, Bloomington) is joining the Atmospheres section editorial board as an associate editor now; she will transition to editor in January 2010.

36 CFR 51.3 - How are terms defined in this part?

Code of Federal Regulations, 2014 CFR

2014-07-01

... 36 Parks, Forests, and Public Property 1 2014-07-01 2014-07-01 false How are terms defined in this part? 51.3 Section 51.3 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE... services to guests). Visitor services may include, but are not limited to, lodging, campgrounds, food...

36 CFR 51.3 - How are terms defined in this part?

Code of Federal Regulations, 2012 CFR

2012-07-01

... 36 Parks, Forests, and Public Property 1 2012-07-01 2012-07-01 false How are terms defined in this part? 51.3 Section 51.3 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE... services to guests). Visitor services may include, but are not limited to, lodging, campgrounds, food...

36 CFR 51.3 - How are terms defined in this part?

Code of Federal Regulations, 2013 CFR

2013-07-01

... 36 Parks, Forests, and Public Property 1 2013-07-01 2013-07-01 false How are terms defined in this part? 51.3 Section 51.3 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE... services to guests). Visitor services may include, but are not limited to, lodging, campgrounds, food...

36 CFR 51.3 - How are terms defined in this part?

Code of Federal Regulations, 2011 CFR

2011-07-01

... 36 Parks, Forests, and Public Property 1 2011-07-01 2011-07-01 false How are terms defined in this part? 51.3 Section 51.3 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE... services to guests). Visitor services may include, but are not limited to, lodging, campgrounds, food...

Quality of customer service: perceptions from guests in all-inclusive resorts in Jamaica

Treesearch

Joel L. Frater

2007-01-01

With data collected from guests in all-inclusive resorts in Jamaica, West Indies, the purposes of this study were to: (1) delineate unique dimensions of customer service perceptions among guests and (2) report the finding of a study that measured guests' perceptions of the quality of customer service in all-inclusive resorts. The study asked the following research...

Dissemination of go sun smart in outdoor recreation: effect of program exposure on sun protection of guests at high-altitude ski areas.

PubMed

Walkosz, Barbara J; Buller, David B; Andersen, Peter A; Scott, Michael D; Dignan, Mark B; Cutter, Gary R; Liu, Xia; Maloy, Julie A

2014-09-01

Go Sun Smart is a theory-based health communication program designed to influence sun-protection behaviors of employees and guests at high-altitude ski areas to reduce skin cancer risk. The effects of Go Sun Smart, in a Phase IV dissemination randomized posttest-only trial, on sun-protection behaviors of ski area guests are reported. Program use was assessed by on-site observation and guest message exposure, and sun protection was measured in intercept surveys at ski areas. Dissemination strategy-enhanced versus basic-was not significantly related to sun safety practices. Additional analyses examined the relation between message exposure and guests' sun safety practices. Ski areas displaying at least 6 Go Sun Smart materials in guest-only areas and 9 Go Sun Smart materials throughout the area increased guests' message exposure. Higher message exposure within the high-use ski areas was associated with improved sun protection by guests but not within the low-use ski areas. The authors underscore the importance of program implementation and message exposure on the success of evidence-based health communication efforts applied industrywide.

Scientists, postmodernists or fascists?

PubMed

Pearson, Alan

2006-12-01

The somewhat frenzied reaction to publication of a provocative, discursive paper titled 'Deconstructing the evidence-based discourse in health sciences: truth, power and fascism' by Holmes et al. in the International Journal of Evidence-Based Healthcare is both surprising and worrying. The paper is essentially a postmodernist critique of evidence-based healthcare. In the same issue of the journal in which the paper was published both the guest editorial and a response to the paper refute its claims. However, media coverage on the paper gave rise to numerous defensive responses that attacked the paper through claiming it represents 'bad science' or by disparaging the International Journal of Evidence-Based Healthcare, its Editor, its peer review processes or the organisation linked to the journal, the Joanna Briggs Institute. It is clear that those who mounted these attacks had no knowledge of the journal (or of the editorial and response refuting the claims made in the paper, published in the same issue) or its parent organisation; and none of them attempted to critique the paper in a scholarly fashion. This paper sets out to construct a scholarly argument to refute these claims and to consider why it is that those who support evidence-based healthcare and/or science chose to disparage a journal and an organisation that promotes and facilitates evidence-based approaches to healthcare - and the value of the Cochrane Collaboration - rather than developing a rigorous critique of the argument developed in the Holmes et al. paper. Although this response appears to be an attempt to silence dissenting views (and may, to some, suggest that the reference to microfascism in the paper in question may, indeed, have some validity) we conclude that the postmodernist critique of evidence-based healthcare embodied in the paper sets out criticisms that, though widespread in healthcare, can be challenged in a considered, scholarly way. The ill-informed, reactionary responses to it by the defenders of science make little contribution to the ongoing development of evidence to improve global health.

On the mechanism of action of gated molecular baskets: The synchronicity of the revolving motion of gates and in/out trafficking of guests

PubMed Central

Hermann, Keith; Rieth, Stephen; Taha, Hashem A; Wang, Bao-Yu; Hadad, Christopher M

2012-01-01

Summary We used dynamic 1H NMR spectroscopic methods to examine the kinetics and thermodynamics of CH3CCl3 (2) entering and leaving the gated molecular basket 1. We found that the encapsulation is first-order in basket 1 and guest 2, while the decomplexation is zeroth-order in the guest. Importantly, the interchange mechanism in which a molecule of CH3CCl3 directly displaces the entrapped CH3CCl3 was not observed. Furthermore, the examination of the additivity of free energies characterizing the encapsulation process led to us to deduce that the revolving motion of the gates and in/out trafficking of guests is synchronized, yet still a function of the affinity of the guest for occupying the basket: Specifically, the greater the affinity of the guest for occupying the basket, the less effective the gates are in “sweeping” the guest as the gates undergo their revolving motion. PMID:22423275

External and internal guest binding of a highly charged supramolecular host in water: deconvoluting the very different thermodynamics.

PubMed

Sgarlata, Carmelo; Mugridge, Jeffrey S; Pluth, Michael D; Tiedemann, Bryan E F; Zito, Valeria; Arena, Giuseppe; Raymond, Kenneth N

2010-01-27

NMR, UV-vis, and isothermal titration calorimetry (ITC) measurements probe different aspects of competing host-guest equilibria as simple alkylammonium guest molecules interact with both the exterior (ion-association) and interior (encapsulation) of the [Ga(4)L(6)](12-) supramolecular assembly in water. Data obtained by each independent technique measure different components of the host-guest equilibria and only when analyzed together does a complete picture of the solution thermodynamics emerge. Striking differences between the internal and external guest binding are found. External binding is enthalpy driven and mainly due to attractive interactions between the guests and the exterior surface of the assembly while encapsulation is entropy driven as a result of desolvation and release of solvent molecules from the host cavity.

Creating Learning Experiences that Promote Informal Science Education: Designing Conservation-Focused Interactive Zoo Exhibits through Action Research

NASA Astrophysics Data System (ADS)

Kalenda, Peter

Research on exhibit design over the past twenty years has started to identify many different methods to increase the learning that occurs in informal education environments. This study utilized relevant research on exhibit design to create and study the effectiveness of a mobile interactive exhibit at the Seneca Park Zoo that promotes socialization, engagement in science, and conservation-related practices among guests. This study will serve as one component of a major redesign project at the Seneca Park Zoo for their Rocky Coasts exhibit. This action research study targeted the following question, "How can interactive exhibits be designed to promote socialization, engagement in science, and real-world conservation-related practices (RCPs) among zoo guests?" Specific research questions included: 1. In what ways did guests engage with the exhibit? 2. In what ways were guests impacted by the exhibit? a) What evidence exists, if any, of guests learning science content from the exhibit? b) What evidence exists, if any, of guests being emotionally affected by the exhibit? c) What evidence exists, if any, of guests changing their RCPs after visiting the exhibit? Data were collected through zoo guest surveys completed by zoo guests comparing multiple exhibits, interviews with guests before and after they used the prototype exhibit, observations and audio recordings of guests using the prototype exhibit, and follow-up phone interviews with guests who volunteered to participate. Data were analyzed collaboratively with members of the zoo's exhibit Redesign Team using grounded theory qualitative data analysis techniques to find patterns and trends among data. Initial findings from data analysis were used to develop shifts in the exhibit in order to increase visitor engagement and learning. This process continued for two full action research spirals, which resulted in three iterations of the prototype exhibit. The overall findings of this study highlight the ways in which guests engaged with and were impacted by this exhibit. Findings revealed the importance of the location of interactives and signage as well as a range of readability concerns for visitor engagement. In addition, findings highlight the roles of parents in informal learning environments, and the impact of exhibit design on dwell time and questioning. This study demonstrates the value and importance of utilizing an iterative design process informed by action research when creating learning experiences in zoos. This study also reinforces how difficult it can be to both influence and measure the shifting of guests' RCPs.

Remarks From the section president

NASA Astrophysics Data System (ADS)

Morse, Tony

The old order changeth and Bruce Marsh is hibernating in the forests of Maine, where his fellow loggers wish him well on a much-deserved sabbatical. VGP members have cause to be very grateful for his presidency, in which he inaugurated the Presidents' Breakfasts for the exchange of information among the sections at each of our annual meetings, served heroically on editorial search and audit committees, and ran our section with the kind of loose informality and penetrating insight that it deserves.

Chemically armed mercenary ants protect fungus-farming societies.

PubMed

Adams, Rachelle M M; Liberti, Joanito; Illum, Anders A; Jones, Tappey H; Nash, David R; Boomsma, Jacobus J

2013-09-24

The ants are extraordinary in having evolved many lineages that exploit closely related ant societies as social parasites, but social parasitism by distantly related ants is rare. Here we document the interaction dynamics among a Sericomyrmex fungus-growing ant host, a permanently associated parasitic guest ant of the genus Megalomyrmex, and a raiding agro-predator of the genus Gnamptogenys. We show experimentally that the guest ants protect their host colonies against agro-predator raids using alkaloid venom that is much more potent than the biting defenses of the host ants. Relatively few guest ants are sufficient to kill raiders that invariably exterminate host nests without a cohabiting guest ant colony. We also show that the odor of guest ants discourages raider scouts from recruiting nestmates to host colonies. Our results imply that Sericomyrmex fungus-growers obtain a net benefit from their costly guest ants behaving as a functional soldier caste to meet lethal threats from agro-predator raiders. The fundamentally different life histories of the agro-predators and guest ants appear to facilitate their coexistence in a negative frequency-dependent manner. Because a guest ant colony is committed for life to a single host colony, the guests would harm their own interests by not defending the host that they continue to exploit. This conditional mutualism is analogous to chronic sickle cell anemia enhancing the resistance to malaria and to episodes in human history when mercenary city defenders offered either net benefits or imposed net costs, depending on the level of threat from invading armies.

International Education in the Schools: The State of the Field

ERIC Educational Resources Information Center

Kagan, Sharon Lynn; Stewart, Vivien

2004-01-01

The improvement of international education in U.S. schools cries out for strong national leadership. The authors, guest editors of this special section, make the case that helping students become globally competent citizens is crucial to the future prosperity and security of the United States, and they discuss strategies for making this happen.…

Politics in the Consulting Room.

PubMed

Plakun, Eric M; Steele, Thomas E

2017-07-01

The recent presidential campaign and election have had a strong impact on many patients and clinicians. This guest column and its introduction by Dr Eric Plakun, who edits the psychotherapy section of the journal, note the inevitability that we will all self-disclose, while describing some of the pros and cons and impacts of self-disclosure of a clinician's political perspectives.

36 CFR 1280.72 - What additional rules apply for a NARA approved event?

Code of Federal Regulations, 2011 CFR

2011-07-01

... for a NARA approved event? 1280.72 Section 1280.72 Parks, Forests, and Public Property NATIONAL... approved event? (a) Approved applicants must provide support people as needed to register guests... for the use of food and drink at your event. (d) No food or drink may be present or consumed in areas...

36 CFR 1280.72 - What additional rules apply for a NARA approved event?

Code of Federal Regulations, 2012 CFR

2012-07-01

... for a NARA approved event? 1280.72 Section 1280.72 Parks, Forests, and Public Property NATIONAL... approved event? (a) Approved applicants must provide support people as needed to register guests... for the use of food and drink at your event. (d) No food or drink may be present or consumed in areas...

36 CFR 1280.72 - What additional rules apply for a NARA approved event?

Code of Federal Regulations, 2014 CFR

2014-07-01

... for a NARA approved event? 1280.72 Section 1280.72 Parks, Forests, and Public Property NATIONAL... approved event? (a) Approved applicants must provide support people as needed to register guests... for the use of food and drink at your event. (d) No food or drink may be present or consumed in areas...

The molecular transport and intercalation of guest molecules into hydrogen-bonded metal-organic frameworks (HMOFs)

NASA Astrophysics Data System (ADS)

Hogan, Greg Anthony

The process of molecular transport and intercalation has been widely studied for many years, resulting in the discovery of molecular frameworks that are capable of hosting guest molecules or ions. Layered and porous metal-organic frameworks (MOFs) have been found to have applications in the field of catalysis, storage, separations, and ion-exchange. More recently, molecular components with peripheral hydrogen-bonding moieties have been used to affect the synthesis of hydrogen-bonded metal-organic frameworks (HMOFs) as an alternative to MOFs, which are interconnected via coordinate-covalent bonds. While MOFs are perhaps stronger materials, HMOFs have the advantage of being easily modifiable and more flexible. Because HMOFs have not been extensively studied for their ability to host molecules, and because their ability to withstand guest loss and guest exchange is essentially unknown, here we report the synthesis and molecular transport properties of both close-packed and porous HMOFs. Layered materials can mimic the behavior of naturally occurring clays, where guest molecules are absorbed and the layer will expand to accommodate the entering guest molecule. We have created a clay mimic composed of a metal pyridine-dicarboxylates and ammonium counterions (a layered HMOF), which is suitable for studying the ability of such materials to absorb guest molecules. We can control the distance of the interlayer region, as well as the chemical nature (hydrophobic or hydrophilic) by varying the organic amine. The metal complex contains axial water ligands that are replaceable, and such ligand exchange has precedence in coordination polymer (MOF) systems, and has been termed "coordinative intercalation". Using the synthesized layered material we examined the process of intercalation, having chosen a variety of guest molecules ranging from alkyl to aryl molecules, each of which have substituents varying in size, shape and electronics. The first set of guest molecules are non-coordinating and are theoretically capable of entering the layer and anchoring freely through the use of non-covalent interactions. The second set of guest molecules contain a pyridine moiety that can exchange with the coordinated water ligand through coordinative-intercalation. The products have been characterized by TGA, DSC, UV-Vis, and powder XRD. Further work was dedicated to examining porous materials, which were created using organic diamines, rather than simple primary amines, as starting materials. The resulting diammonium cations act as pillars, forming open channels. The predefined channel dimensions allow the insertion of specific sized guest molecules. The walls of the channel are close-packed, so that in theory guest molecules can travel in one direction through the solid. Using the synthesized pillared structure we investigated guest inclusion and selectivity through the process of co-crystallization. The stability of the pillared structure in the absence of guests is also reported, as well as the potential for the empty pillared structure to withstand guest re-insertion and removal.

Developments in the field of allergy in 2011 through the eyes of Clinical and Experimental Allergy.

PubMed

Arshad, S H; Dharmage, S C; Ferreira, F; Fixman, E D; Gadermaier, G; Hauser, M; Sampson, A P; Teran, L M; Wallner, M; Wardlaw, A J

2012-12-01

As in previous years, we felt it would be of value to our readership to summarize the new information provided by the authors who have published in Clinical and Experimental Allergy in 2011 and set this in the context of recent advances in our understanding of the pathogenesis and management of allergic disease in all its many manifestations. In 2011, about 210 articles were published in Clinical and Experimental Allergy including editorials, reviews, opinion articles, guidelines, letters, book reviews and of course at the heart of the journal, papers containing original data. As before, this review is divided into sections based on the way the journal is structured, although this year we have grouped together all the papers dealing with mechanisms of allergic disease, whether they involve patients (clinical mechanisms), pure in vitro studies (basic mechanisms) or animal models (experimental models), as we felt this was a more coherent way to deal with the subject. In the field of asthma and rhinitis, the relationship between airway inflammation and airway dysfunction was of perennial interest to investigators, as were phenotypes and biomarkers. Aspirin hypersensitivity appeared in studies in several papers and there was new interest in asthma in the elderly. The mechanisms involved in allergic disease describe advances in our understanding of T cell responses, the relationship between inflammation and disease, mast cell and basophil activation, steroid resistance and novel therapies. In the section dealing with epidemiology, studies seeking to identify risk factors for allergic disease including vitamin D are prominent, as once again are studies investigating gene-environment interactions. The clinical allergy section focuses on drug allergy, food allergy and immunotherapy. The area of oral immunotherapy for food allergy is well covered and we were grateful to Stephen Durham for guest editing an outstanding special issue on immunotherapy in the centenary year of Leonard Noon's pioneering work. Lastly, in the field of allergens, the interest in component-resolved diagnosis continues to grow and there are also articles describing important novel cultivars and the effect of food processing on the allergenic properties of foods. Another terrific year, full of important and high-quality work,which the journal has been proud to bring to the allergy community. © 2012 Blackwell Publishing Ltd.

Effects of Facilitation Context on Attitude toward Sustainable Seafood

NASA Astrophysics Data System (ADS)

Denton, Kristen E.

This study examined how adult guests to the California Science Center engage with a specific conservation education topic: sustainable seafood. Sustainable seafood is a common education message delivered in informal science institutions. This study also investigated whether engaging in an activity about sustainable seafood while simultaneously viewing live fish species would have a greater impact on guests than participating in the same activity while viewing a laboratory space. The data showed that guests who participated in a hands-on activity about sustainable seafood knew more about conservation-related topics and were more likely to adopt behaviors conducive to sustainable seafood consumption than guests who participated in a different hands-on activity. The data also showed that the settings in which guests participate in this Sustainable Seafood activity do not influence their knowledge or behavior. This indicates that this Sustainable Seafood activity is effective in educating adult guests, regardless of the setting.

A room with a viewpoint revisited: descriptive norms and hotel guests' towel reuse behavior.

PubMed

Bohner, Gerd; Schlüter, Lena E

2014-01-01

Field experiments on descriptive norms as a means to increase hotel guests' towel reuse [1] were replicated and extended. In two hotels in Germany (Study 1: N = 724; Study 2: N = 204), descriptive norm messages suggesting that 75% of guests had reused their towels, or a standard message appealing to environmental concerns, were placed in guests' bathrooms. Descriptive norm messages varied in terms of proximity of the reference group ("hotel guests" vs. "guests in this room") and temporal proximity (currently vs. two years previous). Reuse of towels was unobtrusively recorded. Results showed that reuse rates were high overall and that both standard and descriptive norm messages increased reuse rates compared to a no-message baseline. However, descriptive norm messages were not more effective than the standard message, and effects of proximity were inconsistent across studies. Discussion addresses cultural and conceptual issues in comparing the present findings with previous ones.

When We Deal with Children; Selected Writings.

ERIC Educational Resources Information Center

Redl, Fritz

Espousing an interdisciplinary approach, the book contains selected writings, lectures, and speeches concerning clinical work with disturbed children and adolescents in institutional settings. Editorial comment introduces each of the following sections: a survey of the current status of the children's field both clinically and educationally; a…

Keeping Pace . . . A Journalism Update for the Teacher/Adviser.

ERIC Educational Resources Information Center

Burdette, Elizabeth; And Others

Intended as a resource book for journalism instructors or school publication advisers, this booklet encompasses the basics that apply to all scholastic journalism endeavors. The first section, "Teaching Journalism--The Total Program," covers official guidelines and editorial policies, interviewing, gathering news, feature writing, editorial…

Preparation and guest-uptake protocol for a porous complex useful for 'crystal-free' crystallography.

PubMed

Inokuma, Yasuhide; Yoshioka, Shota; Ariyoshi, Junko; Arai, Tatsuhiko; Fujita, Makoto

2014-02-01

We recently reported a new method for single-crystal X-ray diffraction (SCD) analysis that does not require the crystallization of the target compound. In this 'crystal-free' crystallography, a tiny crystal of a porous complex is soaked in the solution of the target guest. The guest molecules are absorbed and oriented in the crystal pores and can be analyzed by X-ray diffraction. We describe here a detailed synthetic protocol for the preparation of uniform single crystals of the porous host complex and for the subsequent guest uptake. The protocol describes our most versatile porous complex, which is prepared from commercially available ZnI2 and 2,4,6-tri(4-pyridyl)-1,3,5-triazine. The host complex has large pores with a cross-section of 8 × 5 Å(2). Single crystals of the complex are grown from layered solutions of the two components. The pores of the as-synthesized complex are filled with nitrobenzene, which is replaced with the inert solvent cyclohexane. This solvent exchange is essential for the rapid and effective inclusion of target compounds. The most crucial and delicate step is the selection of high-quality single crystals from the mixture of crystals of various shapes and sizes. We suggest using the facial indices of the single crystals as a criterion for crystal selection. Single-crystal samples for X-ray analysis can be prepared by immersing the selected crystals in a cyclohexane/dichloromethane solution of target compound. After a very slow evaporation of the solvent, typically over 2 d, the final crystal can be picked and directly subjected to SCD analysis. The protocol can be completed within ∼16 d.

Summary of the research work of the Trace Elements Section, Geochemistry and Petrology Branch, for the period April 1, 1948-December 31, 1950

USGS Publications Warehouse

Rabbitt, John C.

1951-01-01

Much of the material in this report has been paraphrased from reports prepared by members of the Section. My special thanks are due them; to Earl Ingerson, chief of the Geochemistry and Petrology Branch of the Survey, for his critical review; to my secretary, Marie Woolihan, for her aid in collecting material; and to Virginia Layne of the editorial staff of the Section for typing the manuscript and the multilith mats.

Cucurbit[8]uril-Containing Multilayer Films for the Photocontrolled Binding and Release of a Guest Molecule.

PubMed

Nicolas, Henning; Yuan, Bin; Zhang, Xi; Schönhoff, Monika

2016-03-15

The powerful host-guest chemistry of cucurbit[8]uril (CB[8]) was employed to obtain photoresponsive polyelectrolyte multilayer films for the reversible and photocontrolled binding and release of an organic guest molecule. For this purpose, we designed and synthesized a polyelectrolyte with azobenzene side groups. Then, CB[8] was associated with the azo side group to obtain a supramolecular host-guest complex that was further used as building block in order to prepare photoresponsive and CB[8]-containing polyelectrolyte multilayer films. Ultraviolet spectroscopy and a dissipative quartz crystal microbalance are employed to monitor the formation of the host-guest complex and the layer-by-layer self-assembly of the multilayer films, respectively. We demonstrate that the photoresponsive properties of the azo side groups are maintained before and after host-guest complexation with CB[8] in solution and within the multilayer films, respectively. A guest molecule was then specifically included as second binding partner into the CB[8]-containing multilayer films. Subsequently, the release of the guest was performed by UV light irradiation due to the trans-cis isomerization of the adjacent azo side groups. Re-isomerization of the azo side groups was achieved by VIS light irradiation and enabled the rebinding of the guest into CB[8]. Finally, we demonstrate that the photocontrolled binding and release within CB[8]-containing multilayer films can reliably and reversibly be performed over a period of more than 2 weeks with constant binding efficiency. Therefore, we expect such novel type of photosensitive films to have promising future applications in the field of stimuli-responsive nanomaterials.

ESI-MS of Cucurbituril Complexes Under Negative Polarity.

PubMed

Rodrigues, Maria A A; Mendes, Débora C; Ramamurthy, Vaidhyanathan; Da Silva, José P

2017-11-01

Electrospray ionization mass spectrometry (ESI-MS) is a powerful tool to study host-guest supramolecular interactions. ESI-MS can be used for detailed gas-phase reactivity studies, to clarify the structure, or simply to verify the formation of complexes. Depending on the structure of the host and of the guest, negative and/or positive ESI are used. Here we report the unexpected formation of host-guest complexes between cucurbit[n]urils (n = 7, 8, CB[n]) and amine, styryl pyridine, and styryl pyridine dimer cations, under negative ESI. Non-complexed CB[n] form double charged halide (Br - , Cl - , F - ) adducts. Under negative ESI, halide ions interact with CB[n] outer surface hydrogen atoms. One to one host-guest complexes (1:1) of CB[n] with positive charged guests were also observed as single and double charged ions under negative ESI. The positive charge of guests is neutralized by ion-pairing with halide anions. Depending on the number of positive charges guests retain in the gas phase, one or two additional halide ions are required for neutralization. Complexes 1:2 of CB[8] with styryl pyridines retain two halide ions in the gas phase, one per guest. Styryl pyridine dimers form 1:1 complexes possessing a single extra halide ion and therefore a single positive charge. Negative ESI is sensitive to small structural differences between complexes, distinguishing between 1:2 complexes of styryl pyridine-CB[8] and corresponding 1:1 complexes with the dimer. Negative ESI gives simpler spectra than positive ESI and allows the determination of guest charge state of CB[n] complexes in the gas phase. Graphical Abstract ᅟ.

Chemically armed mercenary ants protect fungus-farming societies

PubMed Central

Adams, Rachelle M. M.; Liberti, Joanito; Illum, Anders A.; Jones, Tappey H.; Nash, David R.; Boomsma, Jacobus J.

2013-01-01

The ants are extraordinary in having evolved many lineages that exploit closely related ant societies as social parasites, but social parasitism by distantly related ants is rare. Here we document the interaction dynamics among a Sericomyrmex fungus-growing ant host, a permanently associated parasitic guest ant of the genus Megalomyrmex, and a raiding agro-predator of the genus Gnamptogenys. We show experimentally that the guest ants protect their host colonies against agro-predator raids using alkaloid venom that is much more potent than the biting defenses of the host ants. Relatively few guest ants are sufficient to kill raiders that invariably exterminate host nests without a cohabiting guest ant colony. We also show that the odor of guest ants discourages raider scouts from recruiting nestmates to host colonies. Our results imply that Sericomyrmex fungus-growers obtain a net benefit from their costly guest ants behaving as a functional soldier caste to meet lethal threats from agro-predator raiders. The fundamentally different life histories of the agro-predators and guest ants appear to facilitate their coexistence in a negative frequency-dependent manner. Because a guest ant colony is committed for life to a single host colony, the guests would harm their own interests by not defending the host that they continue to exploit. This conditional mutualism is analogous to chronic sickle cell anemia enhancing the resistance to malaria and to episodes in human history when mercenary city defenders offered either net benefits or imposed net costs, depending on the level of threat from invading armies. PMID:24019482

17 CFR 249.617 - Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the...

Code of Federal Regulations, 2011 CFR

2011-04-01

... 17 Commodity and Securities Exchanges 3 2011-04-01 2011-04-01 false Form X-17A-5, information... Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the..., Oct. 29, 1984] Editorial Note: For Federal Register citations affecting Form X-17A-5, see the List of...

17 CFR 249.617 - Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the...

Code of Federal Regulations, 2012 CFR

2012-04-01

... 17 Commodity and Securities Exchanges 3 2012-04-01 2012-04-01 false Form X-17A-5, information... Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the..., Oct. 29, 1984] Editorial Note: For Federal Register citations affecting Form X-17A-5, see the List of...

17 CFR 249.617 - Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the...

Code of Federal Regulations, 2010 CFR

2010-04-01

... 17 Commodity and Securities Exchanges 3 2010-04-01 2010-04-01 false Form X-17A-5, information... Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the..., Oct. 29, 1984] Editorial Note: For Federal Register citations affecting Form X-17A-5, see the List of...

17 CFR 249.617 - Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the...

Code of Federal Regulations, 2013 CFR

2013-04-01

... 17 Commodity and Securities Exchanges 3 2013-04-01 2013-04-01 false Form X-17A-5, information... Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the..., Oct. 29, 1984] Editorial Note: For Federal Register citations affecting Form X-17A-5, see the List of...

17 CFR 249.617 - Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the...

Code of Federal Regulations, 2014 CFR

2014-04-01

... 17 Commodity and Securities Exchanges 4 2014-04-01 2014-04-01 false Form X-17A-5, information... Form X-17A-5, information required of certain brokers and dealers pursuant to section 17 of the..., Oct. 29, 1984] Editorial Note: For Federal Register citations affecting Form X-17A-5, see the List of...

Capturing Guest Dynamics in Metal-Organic Framework CPO-27-M (M = Mg, Zn) by (2)H Solid-State NMR Spectroscopy.

PubMed

Xu, Jun; Sinelnikov, Regina; Huang, Yining

2016-06-07

Metal-organic frameworks (MOFs) are promising porous materials for gas separation and storage as well as sensing. In particular, a series of isostructural MOFs with coordinately unsaturated metal centers, namely, CPO-27-M or M-MOF-74 (M = Mg, Zn, Mn, Fe, Ni, Co, Cu), have shown exceptional adsorption capacity and selectivity compared to those of classical MOFs that contain only fully coordinated metal sites. Although it is widely accepted that the interaction between guest molecules and exposed metal centers is responsible for good selectivity and large maximum uptake, the investigation of such guest-metal interaction is very challenging because adsorbed molecules are usually disordered in the pores and undergo rapid thermal motions. (2)H solid-state NMR (SSNMR) spectroscopy is one of the most extensively used techniques for capturing guest dynamics in porous materials. In this work, variable-temperature (2)H wide-line SSNMR experiments were performed on CPO-27-M (M = Mg, Zn) loaded with four prototypical guest molecules: D2O, CD3CN, acetone-d6, and C6D6. The results indicate that different guest molecules possess distinct dynamic behaviors inside the channel of CPO-27-M. For a given guest molecule, its dynamic behavior also depends on the nature of the metal centers. The binding strength of guest molecules is discussed on the basis of the (2)H SSNMR data.

American Newspaper Editorials on the Vietnam War: An Experimental Approach to Editorial Content Analysis.

ERIC Educational Resources Information Center

Elias, Stephen N.

The editorials about four Vietnam War news events that appeared in five newspapers were examined for content, tone, page placement, and length to discover what trends in editorial coverage occurred. The 131 editorials that were examined appeared in the "New York Times," the "Los Angeles Times," the "Wall Street…

EDITORIAL A Quarter-Century of Immunotoxicology: Looking Back, Looking Forward

EPA Science Inventory

The Immunotoxicology Specialty Section of the Society of Toxicology celebrated its 25th anniversary at the 2010 Annual Meeting, prompting us to provide here both an historical perspective and an assessment of the challenges that lie ahead for this sub-discipline of toxicology. In...

45 CFR 85.62 - Coordination and compliance responsibilities.

Code of Federal Regulations, 2011 CFR

2011-10-01

....62 Section 85.62 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION... DEPARTMENT OF HEALTH AND HUMAN SERVICES § 85.62 Coordination and compliance responsibilities. (a) Each.... Pt. 85, Nt. Editorial Note: At the request of the Department of Health and Human Services, the...

Summary of Comments on Test Methods Amendments Proposed in the Federal Register on August 27, 1997

EPA Pesticide Factsheets

(EPA) proposed amendments to 40 CFR Parts 60, 61, and 63 to reflect miscellaneous editorial changes and technical corrections throughout the parts in sections pertaining to source testing or monitoring of emissions and operations and added Performance Spec

Polarization response of clathrate hydrates capsulated with guest molecules

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zeng, Qun; Li, Jinshan, E-mail: ljs915@263.net, E-mail: myang@scu.edu.cn; Huang, Hui

2016-05-28

Clathrate hydrates are characterized by their water cages encapsulating various guest atoms or molecules. The polarization effect of these guest-cage complexes was studied with combined density functional theory and finite-field calculations. An addition rule was noted for these systems whose total polarizability is approximately equal to the polarizability sum of the guest and the cage. However, their distributional polarizability computed with Hirshfeld partitioning scheme indicates that the guest–cage interaction has considerable influence on their polarization response. The polarization of encapsulated guest is reduced while the polarization of water cage is enhanced. The counteraction of these two opposite effects leads tomore » the almost unchanged total polarizability. Further analysis reveals that the reduced polarizability of encapsulated guest results from the shielding effect of water cage against the external field and the enhanced polarizability of water cage from the enhanced bonding of hydrogen bonds among water molecules. Although the charge transfer through the hydrogen bonds is rather small in the water cage, the polarization response of clathrate hydrates is sensitive to the changes of hydrogen bonding strength. The guest encapsulation strengthens the hydrogen bonding network and leads to enhanced polarizability.« less

New Horizons Pluto Flyby Guest Operations

NASA Astrophysics Data System (ADS)

Simon, M.; Turney, D.; Fisher, S.; Carr, S. S.

2015-12-01

On July 14, 2015, after 9.5 years of cruise, NASA's New Horizons spacecraft flew past the Pluto system to gather first images humankind had ever seen on Pluto and its five moons. While much has been discovered about the Pluto system since New Horizons launch in 2006, the system has never been imaged at high resolution and anticipation of the "First Light" of the Pluto system had been anticipated by planetary enthusiasts for decades. The Johns Hopkins Applied Physics Laboratory (APL), which built and operates New Horizons, was the focal point for gathering three distinct groups: science and engineering team members; media and public affairs representatives; and invited public, including VIP's. Guest operations activities were focused on providing information primarily to the invited public and VIP's. High level objectives for the Guest Operations team was set to entertain and inform the general public, offer media reaction shots, and to deconflict activities for the guests from media activities wherever possible. Over 2000 people arrived at APL in the days surrounding closest approach for guest, science or media operations tracks. Reaction and coverage of the Guest Operations events was universally positive and global in impact: iconic pictures of the auditorium waving flags during the moment of closest approach were published in media outlets on every continent. Media relations activities ensured coverage in all key media publications targeted for release, such as the New York Times, Science, Le Monde, and Nature. Social and traditional media coverage of the events spanned the globe. Guest operations activities are designed to ensure that a guest has a memorable experience and leaves with a lifelong memory of the mission and their partnership in the activity. Results, lessons learned, and other data from the New Horizons guest operations activity will be presented and analyzed.

Mechanism of host-guest complexation by cucurbituril.

PubMed

Márquez, César; Hudgins, Robert R; Nau, Werner M

2004-05-12

The factors affecting host-guest complexation between the molecular container compound cucurbit[6]uril (CB6) and various guests in aqueous solution are studied, and a detailed complexation mechanism in the presence of cations is derived. The formation of the supramolecular complex is studied in detail for cyclohexylmethylammonium ion as guest. The kinetics and thermodynamics of complexation is monitored by NMR as a function of temperature, salt concentration, and cation size. The binding constants and the ingression rate constants decrease with increasing salt concentration and cation-binding constant, in agreement with a competitive binding of the ammonium site of the guest and the metal cation with the ureido carbonyl portals of CB6. Studies as a function of guest size indicate that the effective container volume of the CB6 cavity is approximately 105 A(3). It is suggested that larger guests are excluded for two reasons: a high activation barrier for ingression imposed by the tight CB6 portals and a destabilization of the complex due to steric repulsion inside. For example, in the case of the nearly spherical azoalkane homologues 2,3-diazabicyclo[2.2.1]hept-2-ene (DBH, volume ca. 96 A(3)) and 2,3-diazabicyclo[2.2.2]oct-2-ene (DBO, volume ca. 110 A(3)), the former forms the CB6 complex promptly with a sizable binding constant (1300 M(-1)), while the latter does not form a complex even after several months at optimized complexation conditions. Molecular mechanics calculations are performed for several CB6/guest complexes. A qualitative agreement is found between experimental and calculated activation energies for ingression as a function of both guest size and state of protonation. The potential role of constrictive binding by CB6 is discussed.

Relationship between the cohesion of guest particles on the flow behaviour of interactive mixtures.

PubMed

Mangal, Sharad; Gengenbach, Thomas; Millington-Smith, Doug; Armstrong, Brian; Morton, David A V; Larson, Ian

2016-05-01

In this study, we aimed to investigate the effects cohesion of small surface-engineered guest binder particles on the flow behaviour of interactive mixtures. Polyvinylpyrrolidone (PVP) - a model pharmaceutical binder - was spray-dried with varying l-leucine feed concentrations to create small surface-engineered binder particles with varying cohesion. These spray-dried formulations were characterised by their particle size distribution, morphology and cohesion. Interactive mixtures were produced by blending these spray-dried formulations with paracetamol. The resultant blends were visualised under scanning electron microscope to confirm formation of interactive mixtures. Surface coverage of paracetamol by guest particles as well as the flow behaviour of these mixtures were examined. The flow performance of interactive mixtures was evaluated using measurements of conditioned bulk density, basic flowability energy, aeration energy and compressibility. With higher feed l-leucine concentrations, the surface roughness of small binder particles increased, while their cohesion decreased. Visual inspection of the SEM images of the blends indicated that the guest particles adhered to the surface of paracetamol resulting in effective formation of interactive mixtures. These images also showed that the low-cohesion guest particles were better de-agglomerated that consequently formed a more homogeneous interactive mixture with paracetamol compared with high-cohesion formulations. The flow performance of interactive mixtures changed as a function of the cohesion of the guest particles. Interactive mixtures with low-cohesion guest binder particles showed notably improved bulk flow performance compared with those containing high-cohesion guest binder particles. Thus, our study suggests that the cohesion of guest particles dictates the flow performance of interactive mixtures. Crown Copyright © 2016. Published by Elsevier B.V. All rights reserved.

Nigerian Journalists' Perceptions of Editorial Ethics and of the Role of Editorials in National Development.

ERIC Educational Resources Information Center

Pratt, Cornelius B.; McLaughlin, Gerald W.

A study examined Nigerian journalists' self-reported perceptions of editorial ethics and of the role of editorials in national development, comparing data with an earlier content analysis of the ethics of newspaper editorials. Subjects, 348 full-time, salaried Nigerian journalists on nine national newspapers in two newspaper ownership groups,…

Troubled Meditations on Psychosexual Differentiation: Reply to Hegarty (2009)

ERIC Educational Resources Information Center

Zucker, Kenneth J.; Drummond, Kelley D.; Bradley, Susan J.; Peterson-Badali, Michele

2009-01-01

P. Hegarty (2009) offered several critiques of the articles by G. Rieger, J. A. W. Linsenmeier, L. Gygax, and J. M. Bailey (2008) and K. D. Drummond, S. J. Bradley, M. Peterson-Badali, and K. J. Zucker (2008) that were published in a "Developmental Psychology" special section entitled "Sexual Orientation Across the Lifespan," guest-edited by C. J.…

[Report of the editors, 2013].

PubMed

García Puig, J; Gaspar Alonso-Vega, G; Ríos Blanco, J J

2014-01-01

The editors of Revista Clínica Española(Rev Clin Esp) inform on their editorial activity during the last 12 months: (a) objectives and attainments, (b) editorial activity, and (c) objectives for 2014. In 2013 the most relevant modification concerning the editorial activity has been the translation into English of the 5 manuscripts with abstract contained in each issue (http://www.revclinesp.es/). From the first January to the 30th September 2013 we received 458 manuscripts (50.9 manuscripts per month), a similar figure to that obtained in 2012 (51.1 manuscripts per month). The acceptance rate of the 443 manuscripts whose editorial process has been concluded was 23.7% (originals, 11.8%). We asked for 253 revisions to 186 reviewers and we received 74.4% revisions in less than 2 weeks (10.9 days). The mean time to adopt an editorial decision for all manuscripts («accepted»/«rejected») has been 20,3 (half than in 2009). For «originals» this figure has dropped from 56.6 days in 2009 to 22.5 days in 2013. The mean time elapsed from manuscript reception to its on-line publication was 94.8 days in 2013 (110.5 in 2012 and 155.8 in 2011). In 2013 the collaboration with the working groups from the Internal Medicine Spanish Foundation has reported 17 published manuscripts. In 2013 we were informed that the Journal Citation Reports excluded Rev Clin Esp from its impact factor journal list due to its elevated self-citations. We have taken a number of actions to reduce self-citations and we expect to be a minority in 2014. Some other data concerning the editorial policy are encouraging. In this sense, manuscript citation to Rev Clin Esp published articles has seen a substantial increase from 19% in 2008 to 29% in 2012. We work to achieve the digitalization of Rev Clin Esp from 1940 to 1999 (the journal is already digitalized since 2000). The continuous renewal of the journal sections and the working groups collaboration are necessary elements to make our journal, each day, better. Copyright © 2013 Elsevier España, S.L. All rights reserved.

Guest molecules as a design element for metal–organic frameworks

DOE PAGES

Allendorf, Mark D.; Medishetty, Raghavender; Fischer, Roland A.

2016-11-07

The well-known synthetic versatility of MOFs is rooted in the ability to predict the metal ion coordination geometry and the vast possibilities to use organic chemistry to modify the linker groups. However, the use of “non-innocent” guest molecules as a component of framework design has been largely ignored. Nevertheless, recent reports show that the presence of guest molecules can have dramatic effects, even when these are seemingly innocuous species such as water or polar solvents. Advantages of using guests to impart new properties to MOFs include the relative ease of introducing new functionalities, the ability to modify the properties materialmore » at will by removing the guest or inserting different ones, and avoidance of the difficulties associated with synthesizing new frameworks, which can be challenging even when the basic topology remains constant. In this article we describe the “Guest@MOF” concept and provide examples illustrating its potential as a new MOF design element.« less

Untangling the Diverse Interior and Multiple Exterior Guest Interactions of a Supramolecular Host by the Simultaneous Analysis of Complementary Observables.

PubMed

Sgarlata, Carmelo; Raymond, Kenneth N

2016-07-05

The entropic and enthalpic driving forces for encapsulation versus sequential exterior guest binding to the [Ga4L6](12-) supramolecular host in solution are very different, which significantly complicates the determination of these thermodynamic parameters. The simultaneous use of complementary techniques, such as NMR, UV-vis, and isothermal titration calorimetry, enables the disentanglement of such multiple host-guest interactions. Indeed, data collected by each technique measure different components of the host-guest equilibria and together provide a complete picture of the solution thermodynamics. Unfortunately, commercially available programs do not allow for global analysis of different physical observables. We thus resorted to a novel procedure for the simultaneous refinement of multiple parameters (ΔG°, ΔH°, and ΔS°) by treating different observables through a weighted nonlinear least-squares analysis of a constrained model. The refinement procedure is discussed for the multiple binding of the Et4N(+) guest, but it is broadly applicable to the deconvolution of other intricate host-guest equilibria.

Host–guest complexes between cryptophane-C and chloromethanes revisited

PubMed Central

Takacs, Z; Soltesova, M; Kowalewski, J; Lang, J; Brotin, T; Dutasta, J-P

2013-01-01

Cryptophane-C is composed of two nonequivalent cyclotribenzylene caps, one of which contains methoxy group substituents on the phenyl rings. The two caps are connected by three OCH2CH2O linkers in an anti arrangement. Host–guest complexes of cryptophane-C with dichloromethane and chloroform in solution were investigated in detail by nuclear magnetic resonance techniques and density functional theory (DFT) calculations. Variable temperature proton and carbon-13 spectra show a variety of dynamic processes, such as guest exchange and host conformational transitions. The guest exchange was studied quantitatively by exchange spectroscopy measurements or by line-shape analysis. The conformational preferences of the guest-containing host were interpreted through cross-relaxation measurements, providing evidence of the gauche+2 and gauche−2 conformations of the linkers. In addition, the mobility of the chloroform guest inside the cavity was studied by carbon-13 relaxation experiments. Combining different types of evidence led to a detailed picture of molecular recognition, interpreted in terms of conformational selection. Copyright © 2012 John Wiley & Sons, Ltd. PMID:23132654

Spectroscopic investigation of different concentrations of the vapour deposited copper phthalocyanine as a "guest" in polyimide matrix.

PubMed

Georgiev, Anton; Yordanov, Dancho; Dimov, Dean; Assa, Jacob; Spassova, Erinche; Danev, Gencho

2015-04-05

Nanocomposite layers 250 nm copper phthalocyanine/polyimide prepared by simultaneous vapour deposition of three different sources were studied. Different concentrations of copper phthalocyanine as a "guest" in polyimide matrix as a function of conditions of the preparation have been determined by FTIR (Fourier Transform Infrared) and UV-VIS (Ultraviolet-Visible) spectroscopies. The aim was to estimate the possibility of the spectroscopic methods for quantitative determination of the "guest" and compare with the quality of the polyimide thin films in relation to the "guest" concentration. The band at 1334 cm(-1) has been used for quantitative estimation of "guest" in polyimide matrix. The concentrations of the copper phthalocyanine less than 20% require curve fitting techniques with Fourier self deconvolution. The relationship between "guest" concentrations and degree of imidization, as well as the electronic UV-VIS spectra are discussed in relation to the composition, imidization degree and the two crystallographic modification of the embedded chromophore. Copyright © 2015 Elsevier B.V. All rights reserved.

CDF Reports. 1996.

ERIC Educational Resources Information Center

Clevenger, Sydney Stephenson, Ed.

1996-01-01

This document consists of the 11 issues of the Children's Defense Fund (CDP) Report published during 1996. Issues discuss concerns related to child advocacy and provide information on problems in children's lives in the United States. Regular sections in each issue are the editorial column "A Voice for Children," a status report on…

Basic Genetics: A Human Approach.

ERIC Educational Resources Information Center

Biological Sciences Curriculum Study, Colorado Springs, CO. Center for Education in Human and Medical Genetics.

This document (which has the form of a magazine) provides a variety of articles, stories, editorials, letters, interviews, and other types of magazine features (such as book reviews) which focus on human genetics. In addition to providing information about the principles of genetics, nearly all of the sections in the "magazine" address moral,…

77 FR 4910 - Editorial Revisions to the Commission's Rules

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-01

... prevent unintentional access to the public switched telephone network by base units, and unintentional..., as defined in paragraph (b)(3) of this section, the isolation between the antenna and cable input... applies at 550 MHz. In the case of a transfer switch requiring a power source, the required isolation...

27 CFR 5.32 - Mandatory label information.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2012-04-01 2012-04-01 false Mandatory label information. 5.32 Section 5.32 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU....D. 7020, 34 FR 20337, Dec. 30, 1969] Editorial Note: For Federal Register citations affecting § 5.32...

27 CFR 5.32 - Mandatory label information.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2011-04-01 2011-04-01 false Mandatory label information. 5.32 Section 5.32 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU....D. 7020, 34 FR 20337, Dec. 30, 1969] Editorial Note: For Federal Register citations affecting § 5.32...

Federal Budget Analysis on Children's Social Services Programs. FY 1985.

ERIC Educational Resources Information Center

Capitol Publications, Inc., Arlington, VA.

To help subscribers better understand the federal budget, the editorial staff of "Report on Preschool Programs" has prepared this special analysis of the fiscal 1985 budget. The first section presents an overview of President Reagan's fiscal 1985 budget request and reports congressional reactions. Information focuses on the Social…

Guest editorial: Introduction to the special issue on modern control for computer games.

PubMed

Argyriou, Vasileios; Kotsia, Irene; Zafeiriou, Stefanos; Petrou, Maria

2013-12-01

A typical gaming scenario, as developed in the past 20 years, involves a player interacting with a game using a specialized input device, such as a joystic, a mouse, a keyboard, etc. Recent technological advances and new sensors (for example, low cost commodity depth cameras) have enabled the introduction of more elaborated approaches in which the player is now able to interact with the game using his body pose, facial expressions, actions, and even his physiological signals. A new era of games has already started, employing computer vision techniques, brain-computer interfaces systems, haptic and wearable devices. The future lies in games that will be intelligent enough not only to extract the player's commands provided by his speech and gestures but also his behavioral cues, as well as his/her emotional states, and adjust their game plot accordingly in order to ensure more realistic and satisfactory gameplay experience. This special issue on modern control for computer games discusses several interdisciplinary factors that influence a user's input to a game, something directly linked to the gaming experience. These include, but are not limited to, the following: behavioral affective gaming, user satisfaction and perception, motion capture and scene modeling, and complete software frameworks that address several challenges risen in such scenarios.

A review of electron-phonon coupling seen in the high-Tc superconductors by angle-resolved photoemission studies (ARPES)

NASA Astrophysics Data System (ADS)

Cuk, T.; Lu, D. H.; Zhou, X. J.; Shen, Z.-X.; Devereaux, T. P.; Nagaosa, N.

2005-01-01

This issue of pss (b) - basic solid state physics contains a collection of Review Articles on the rather controversially discussed topic of Electron-Phonon Interaction in High-Temperature Superconductors, guest-edited by Miodrag Kuli, Johann Wolfgang Goethe-Universität Frankfurt/Main, Germany, with a Preface written by V. L. Ginzburg and E. G. Maksimov [1].The cover picture, taken from the review [2] by T. Cuk et al., shows plots of the electron-phonon coupling vertex, g2(k, k), where k, k are the initial and final electron momentum for electrons scattered by the bond-buckling phonon B1g (the out-of-phase vibration of the in-plane oxygen) in a tight-binding model of the copper-oxygen plane. The momentum dependence of this vertex, along with the d-wave superconducting gap and the van Hove singularity at the anti-node, accounts for the momentum dependence of the collective mode coupling seen in angle-resolved photoemission data on Bi2212.The present issue also sees the start of our rapid research letters, the fastest peer-reviewed publication medium in solid state physics. For more information see www.pss-rapid.com and the Editorial by the Editor-in-Chief Martin Stutzmann on page 7 [3].

The internet 2006.

PubMed

Oppenheim, William L

2006-09-01

Each year Developmental Medicine and Child Neurology (DMCN) invites the President Elect of the American Academy for Cerebral Palsy and Developmental Medicine (AAPCDM) to compose a guest editorial. As we mark the 60th anniversary of the Academy, I welcome the opportunity to make a few observations on the emergence of the internet as a medium that, within the space of two decades, has had an increasing influence upon both medical research and its dissemination throughout the world. Although the Academy's founding fathers certainly recognized that communication was the key to future progress, it is unlikely that they could have imagined what was ahead in terms of instantaneous information exchange or how that capability would promote collaboration at great distances, speed up the decoding of the human genome, and empower patients with information that previously had largely been the province of academia. This September, portions of our annual meeting will be webcast from Boston to 10 locations in four different countries around the world. Individuals who cannot attend the meeting in person will have an opportunity to view the lectures, and then, in special sessions, to engage in real-time exchanges with many of the presenters. In addition, the AACPDM now presents a monthly 1-hour webcast for entitled members concentrating on timely subjects by world-renowned authorities.

PREFACE: 14th General Conference of the Condensed Matter Division

NASA Astrophysics Data System (ADS)

de Segovia, José L.; Flores, F.; García-Moliner, F.

1994-01-01

This volume contains the proceedings of the 14th General Conference of the Condensed Matter Division, GCCMD-14, held on 28-31 March 1994, at the Faculty of Civil Engineering of the Polytechnical University of Madrid. The publication contains the Plenary and Invited Lectures of those authors who agreed to publish their presentations. The meeting was organized by the Spanish Vacuum Society, ASEVA, under the auspices of the Condensed Matter Division of the European Physical Society, CMD-EPS. The Conference was attended by 466 participants mostly from Europe. The emphasis of the Conference was mainly on: Semiconductors and Insulators Surfaces and Interfaces Liquids and Statistical Mechanics Magnetism and Metals Macromolecules and Chemical Physics The 554 contributions were presented as 6 plenary lectures, 67 invited lectures, 140 oral presentation and 341 poster presentation, in five parallel sessions. The guest Editors are grateful to those authors who sent their contribution for the publication, to the Organizing Committee, to the International Advisory and Programme Committee and to the Local Committee for their excellent work. We also wish to thank those colleagues who took on the hard task of helping in refereeing the papers. It is also a pleasure to thank the Physica Scripta Editor and Editorial Board of Physica Scripta.

Guest Speakers in School-Based Sexuality Education

ERIC Educational Resources Information Center

McRee, Annie-Laurie; Madsen, Nikki; Eisenberg, Marla E.

2014-01-01

This study, using data from a statewide survey (n = 332), examined teachers' practices regarding the inclusion of guest speakers to cover sexuality content. More than half of teachers (58%) included guest speakers. In multivariate analyses, teachers who taught high school, had professional preparation in health education, or who received…

Energy transfer in a mechanically trapped exciplex.

PubMed

Klosterman, Jeremy K; Iwamura, Munetaka; Tahara, Tahei; Fujita, Makoto

2009-07-15

Host-guest complexes involving M(6)L(4) coordination cages can display unusual photoreactivity, and enclathration of the very large fluorophore bisanthracene resulted in an emissive, mechanically trapped intramolecular exciplex. Mechanically linked intramolecular exciplexes are important for understanding the dependence of energy transfer on donor-acceptor distance, orientation, and electronic coupling but are relatively unexplored. Steady-state and picosecond time-resolved fluorescence measurements have revealed that selective excitation of the encapsulated guest fluorophore results in efficient energy transfer from the excited guest to an emissive host-guest exciplex state.

The guest-worker in Western Europe--an obituary.

PubMed

Castles, S

1986-01-01

The significance of guest workers is examined for six Western European countries. It is found that "the dynamics of the migratory process led to family reunification and settlement, against the original intentions of the workers, employers and states concerned. The recruitment of guest-workers stopped after 1974, but many migrants stayed on, becoming permanent ethnic minorities, in a situation of economic and social crisis. It is argued that guest-worker systems inevitably lead to permanent migration in the long run, and that it is better to plan for orderly settlement through appropriate policies." excerpt

Host-guest complexes of local anesthetics with cucurbit[6]uril and para-sulphonatocalix[8]arene in the solid state

NASA Astrophysics Data System (ADS)

Danylyuk, Oksana; Butkiewicz, Helena; Coleman, Anthony W.; Suwinska, Kinga

2017-12-01

Here we describe the host-guest inclusion complexes of local anesthetic drugs with two macrocyclic hosts cucurbit[6]uril and para-sulphonatocalix[8]arene in the solid state. The anesthetic agents used in the co-crystallization with the supramolecular hosts are lidocaine, procaine, procainamide, prilocaine and proparacaine. Both macrocycles encapsulate the alkylammonium moieties of anestetics guests into their cavities although the mechanism of complexation, host-guest stoichiometry and geometry differ depending on the nature of the supramolecular host.

Binding of carboxylate and trimethylammonium salts to octa-acid and TEMOA deep-cavity cavitands

NASA Astrophysics Data System (ADS)

Sullivan, Matthew R.; Sokkalingam, Punidha; Nguyen, Thong; Donahue, James P.; Gibb, Bruce C.

2017-01-01

In participation of the fifth statistical assessment of modeling of proteins and ligands (SAMPL5), the strength of association of six guests ( 3- 8) to two hosts ( 1 and 2) were measured by 1H NMR and ITC. Each host possessed a unique and well-defined binding pocket, whilst the wide array of amphiphilic guests possessed binding moieties that included: a terminal alkyne, nitro-arene, alkyl halide and cyano-arene groups. Solubilizing head groups for the guests included both positively charged trimethylammonium and negatively charged carboxylate functionality. Measured association constants ( K a ) covered five orders of magnitude, ranging from 56 M-1 for guest 6 binding with host 2 up to 7.43 × 106 M-1 for guest 6 binding to host 1.

Complexation of triptycene-derived macrotricyclic polyether with paraquat derivatives, diquat, and a 2,7-diazapyrenium salt: guest-induced conformational changes of the host.

PubMed

Han, Ying; Cao, Jing; Li, Peng-Fei; Zong, Qian-Shou; Zhao, Jian-Min; Guo, Jia-Bin; Xiang, Jun-Feng; Chen, Chuan-Feng

2013-04-05

Complexation between a triptycene-derived macrotricyclic polyether containing two dibenzo-[30]-crown-10 cavities and different functionalized paraquat derivatives, diquat, and a 2,7-diazapyrenium salt in both solution and solid state was investigated in detail. It was found that depending on the guests with different terminal functional groups and structures, the macrotricyclic polyether could form 1:1 or 1:2 complexes with the guests in different complexation modes in solution and also in the solid state. Especially, the conformation of the macrotricyclic polyether was efficiently adjusted by the encapsulated guests, which was to some extent similar to substrate-induced fit of enzymes. Moreover, the binding and releasing of the guests in the complexes could be controlled by potassium ions.

NMR Investigation of Chloromethane Complexes of Cryptophane-A and Its Analogue with Butoxy Groups

PubMed Central

2014-01-01

Host–guest complexes between cryptophane-A as host and dichloromethane and chloroform as guests are investigated using 1H and 13C NMR spectroscopy. Moreover, a related cryptophane, with the methoxy groups replaced by butoxy units (cryptophane-But), and its complexes with the same guests were also studied. Variable temperature spectra showed effects of chemical exchange between the free and bound guests, as well as of conformational exchange of the host. The guest exchange was studied quantitatively by exchange spectroscopy or line shape analysis. Extraction of kinetic and thermodynamic parameters led to the characterization of the affinity between guests and hosts. On the other hand, the host exchange was investigated by means of 13C Carr–Purcell–Meiboom–Gill (CPMG) relaxation dispersion which aims at the determination of the transverse relaxation rate R2, the inverse of the transverse relaxation time T2, as a function of the repetition of the π pulses in a CPMG train. The variation of the measured transverse relaxation rate with the repetition rate νCPMG indicated conformational exchange occurring on the microsecond–millisecond time scale. Structural information was obtained through measurements of cross-relaxation rates, both within the host and between the host and the guest protons. The NMR results were supported by DFT calculations. PMID:24472055

Prediction of clathrate structure type and guest position by molecular mechanics.

PubMed

Fleischer, Everly B; Janda, Kenneth C

2013-05-16

The clathrate hydrates occur in various types in which the number, size, and shape of the various cages differ. Usually the clathrate type of a specific guest is predicted by the size and shape of the molecular guest. We have developed a methodology to determine the clathrate type employing molecular mechanics with the MMFF force field employing a strategy to calculate the energy of formation of the clathrate from the sum of the guest/cage energies. The clathrate type with the most negative (most stable) energy of formation would be the type predicted (we mainly focused on type I, type II, or bromine type). This strategy allows for a calculation to predict the clathrate type for any cage guest in a few minutes on a laptop computer. It proved successful in predicting the clathrate structure for 46 out of 47 guest molecules. The molecular mechanics calculations also provide a prediction of the guest position within the cage and clathrate structure. These predictions are generally consistent with the X-ray and neutron diffraction studies. By supplementing the diffraction study with molecular mechanics, we gain a more detailed insight regarding the details of the structure. We have also compared MM calculations to studies of the multiple occupancy of the cages. Finally, we present a density functional calculation that demonstrates that the inside of the clathrates cages have a relatively uniform and low electrostatic potential in comparison with the outside oxygen and hydrogen atoms. This implies that van der Waals forces will usually be dominant in the guest-cage interactions.

Guest Chain ``Melting'' in Incommensurate Host-Guest Potassium

NASA Astrophysics Data System (ADS)

McBride, Emma; Munro, Keith; McMahon, Malcolm

2013-06-01

Upon increasing pressure the group-I elements transform from close-packed structures (bcc and fcc) to a series of low-symmetry complex structures. Residing in the middle of the group, potassium (K) has numerous structures in common with its neighbours, and, in fact, is remarkably structurally similar to sodium (Na) and rubidium (Rb). For example, the post-fcc transition in K is to a composite incommensurate host-guest structure (tI19), and the host structure of this phase is isostructural with that found in Na and Rb. Previously we have reported that below 16.7GPa, the Bragg peaks from the guest component of tI19-Rb broaden considerably, signalling a loss of the inter-chain correlation, or a ``melting'' of the chains. Furthermore, in tI19-Na above 125 GPa, the Bragg peaks from the guest component are also broadened, suggesting that the guest chains are also nearly ``melted.'' During studies of the melting curve of K, we observed that the guest peaks from tI19-K broaden dramatically on heating. Here we report single-crystal, quasi-single-crystal, and powder synchrotron x-ray diffraction measurements of tI19-K to 50 GPa and 800 K, which allowed a detailed study of this chain ``melting'' transition. The order-disorder transition is clearly visible over a 30 GPa pressure range, and there are significant changes in the gradient of the phase boundary, which may be influenced by the nature of the guest structure. Furthermore, data extending the melting curve will also be presented.

Diffusion of a Highly-Charged Supramolecular Assembly: Direct Observation of Ion-Association in Water

DOE Office of Scientific and Technical Information (OSTI.GOV)

University of California, Berkeley; Lawrence Berkeley National Laboratory; Raymond, Kenneth

2007-10-22

Understanding the solution behavior of supramolecular assemblies is essential for a full understanding of the formation and chemistry of synthetic host-guest systems. While the interaction between host and guest molecules is generally the focus of mechanistic studies of host-guest complexes, the interaction of the host-guest complex with other species in solution remains largely unknown, although in principle accessible by diffusion studies. Several NMR techniques are available to monitor diffusion and have recently been reviewed. Pulsed gradient spin-echo (PGSE) NMR methods have attracted increasing interest, since they allow diffusion coefficients to be measured with high accuracy; they have been successfully usedmore » with observation of {sup 7}Li and {sup 31}P nuclei as well as with {sup 1}H NMR. We report here the direct measurement of diffusion coefficients to observe ion-association interactions by counter cations with a highly-charged supramolecular assembly. Raymond and coworkers have described the design and chemistry of a class of metal-ligand supramolecular assemblies over the past decade. The [Ga{sub 4}L{sub 6}]{sup 12-} (L = 1,5-bis(2,3-dihydroxybenzamido)naphthalene) (1) (Figure 1) assembly has garnered the most attention, with the exploration of the dynamics and mechanism of guest exchange as well as the ability of 1 to achieve either stoichiometric or catalytic reactions inside its interior cavity. Recent studies have revealed the importance of counter cations in solution on the chemistry of 1. During the mechanistic study of the C-H bond activation of aldehydes by [Cp*Ir(PMe{sub 3})(olefin){sup +} {contained_in} 1]{sup 11-} a stepwise guest dissociation mechanism with an ion-paired intermediate was proposed. Similarly, in the mechanism for the hydrolysis of iminium cations generated from the 3-aza Cope rearrangement of enammonium cations in 1, the presence of an exterior ion association was part of the kinetic model. To further substantiate the indirect kinetic evidence for such ion-paired species, we sought to explore the solution behavior of 1 by studying the diffusion of 1 with varying alkali and tetraalkyl ammonium cations. For large molecules in solution, such as synthetic supramolecular assemblies, the diffusion behavior of host and guest molecules can provide valuable information on host-guest interaction. One characteristic feature of a stable host-guest complex is that the host and guest molecules diffuse at the same rate in solution; this has been observed in a number of supramolecular systems. In order to confirm that this system was suitable for study by diffusion NMR spectroscopy, a PGSE-DOSY spectrum was acquired of [NEt{sub 4} {contained_in} 1]{sup 11-} (Figure 2), which shows that the host and guest molecules diffuse at the same rate. Quantitative analysis of the data, from monitoring the integral of host and guest resonances as a function of applied gradient strength, gave identical diffusion coefficients, confirming that the host and guest molecules diffuse together.« less

Can we beat the biotin-avidin pair?: cucurbit[7]uril-based ultrahigh affinity host-guest complexes and their applications.

PubMed

Shetty, Dinesh; Khedkar, Jayshree K; Park, Kyeng Min; Kim, Kimoon

2015-12-07

The design of synthetic, monovalent host-guest molecular recognition pairs is still challenging and of particular interest to inquire into the limits of the affinity that can be achieved with designed systems. In this regard, cucurbit[7]uril (CB[7]), an important member of the host family cucurbit[n]uril (CB[n], n = 5-8, 10, 14), has attracted much attention because of its ability to form ultra-stable complexes with multiple guests. The strong hydrophobic effect between the host cavity and guests, ion-dipole and dipole-dipole interactions of guests with CB portals helps in cooperative and multiple noncovalent interactions that are essential for realizing such strong complexations. These highly selective, strong yet dynamic interactions can be exploited in many applications including affinity chromatography, biomolecule immobilization, protein isolation, biological catalysis, and sensor technologies. In this review, we summarize the progress in the development of high affinity guests for CB[7], factors affecting the stability of complexes, theoretical insights, and the utility of these high affinity pairs in different challenging applications.

Complexation of imidazopyridine-based cations with a 24-crown-8 ether host: [2]pseudorotaxane and partially threaded structures.

PubMed

Moreno-Olivares, Surisadai I; Cervantes, Ruy; Tiburcio, Jorge

2013-11-01

A new series of linear molecules derived from 1,2-bis(imidazopyridin-2-yl)ethane can fully or partially penetrate the cavity of the dibenzo-24-crown-8 macrocycle to produce a new family of host-guest complexes. Protonation or alkylation of the nitrogen atoms on the pyridine rings led to an increase in the guest total positive charge up to 4+ and simultaneously generated two new recognition sites (pyridinium motifs) that are in competition with the 1,2-bis(benzimidazole)ethane motif for the crown ether. The relative position of the pyridine ring and the chemical nature of the N-substituent determined the preferred motif and the host-guest complex geometry: (i) for linear guests with relatively bulky groups (i.e., a benzyl substituent), the 1,2-bis(benzimidazole)ethane motif is favored, leading to a fully threaded complex with a [2]pseudorotaxane geometry; (ii) for small substituents, such as -H and -CH3 groups, regardless of the guest shape, the pyridinium motifs are preferred, leading to external partially threaded complexes in a 2:1 host to guest stoichiometry.

Effect of pore occupancy on the acoustic properties of zeolitic imidazolate framework (ZIF)-8: A Brillouin spectroscopic study at ambient and low temperatures

NASA Astrophysics Data System (ADS)

Radhakrishnan, Dhanya; Narayana, Chandrabhas

2015-12-01

Brillouin spectroscopy is used to study the effect of pore occupancy on the elastic constants by incorporating various guest molecules into zeolitic imidazolate framework (ZIF)-8. A systematic study on the effect of mass and polarizability of the guest has been carried out by incorporating alcohols of varying chain lengths at room temperature. The interaction between the guest and host affects the elastic properties, lifetimes and guest dynamics inside the pores. The elastic anisotropy was seen to reduce upon incorporation of the guests. We have also studied the temperature dependence of the acoustic modes on gas adsorption to understand the framework flexibility. The Brillouin shift of the acoustic modes increases upon temperature dependent gas adsorption with transverse acoustic modes exhibiting a larger shift. This suggests a hardening of otherwise low shear modulus of ZIF-8. Our findings give insight into the role of guest molecules and temperature in tuning the elastic properties of ZIF-8 which is important for practical applications.

Amphiphilic inclusion spaces for various guests and regulation of fluorescence intensity of 1,8-bis(4-aminophenyl)anthracene crystals.

PubMed

Sugino, Misa; Hatanaka, Keisuke; Araki, Yusuke; Hisaki, Ichiro; Miyata, Mikiji; Tohnai, Norimitsu

2014-03-10

A host framework for inclusion of various guest molecules was investigated by preparation of inclusion crystals of 1,8-bis(4-aminophenyl)anthracene (1,8-BAPA) with organic solvents. X-ray crystallographic analysis revealed construction of the same inclusion space incorporating 1,8-BAPA and eight guest molecules including both non-polar (benzene) and polar guests (N,N-dimethylformamide, DMF). Fluorescence efficiencies varied depending on guest molecule polarity; DMF inclusion crystals exhibited the highest fluorescence intensity (ΦF=0.40), four times as high as that of a benzene inclusion crystal (ΦF=0.10). According to systematic investigations of inclusion phenomena, strong host–guest interactions and filling of the inclusion space led to a high fluorescence intensity. Temperature-dependent fluorescence spectral measurements revealed these factors effectively immobilised the host framework. Although hydrogen bonding commonly decreases fluorescence intensity, the present study demonstrated that such strong interactions provide excellent conditions for fluorescence enhancement. Thus, this remarkable behaviour has potential application toward sensing of highly polar molecules, such as biogenic compounds.

Molecular recognition of curcumin (Indian Ayurvedic medicine) by the supramolecular probe, p-t-butyl calix(8)arene

NASA Astrophysics Data System (ADS)

Meenakshi, C.; Jayabal, P.; Ramakrishnan, V.

2014-06-01

The thermodynamic property of the host-guest complexes formed between the curcumin, component of Indian Ayurvedic medicine turmeric, a drug molecule, with the supra molecule, p-t-butyl calix(8)arene was studied. p-t-Butyl calix(8)arene has been used as a host molecule and curcumin as a guest molecule. Optical absorption spectral studies were carried out to investigate the molecular recognition properties of p-t-butyl calix(8)arene with curcumin. The stochiometry of the host-guest complexes formed and the binding constant were determined. An interesting 1:1 and 4:1 stochiometric host-guest complexes were formed. Job's continuous method of variation and Benesi-Hildebrand expression were used for the determination of binding constant and the stochiometry of the host-guest complex formed.

CALL FOR PAPERS: Progress in Supersymmetric Quantum Mechanics

NASA Astrophysics Data System (ADS)

2003-11-01

This is a call for contributions to a Special Issue of Journal of Physics A: Mathematical and General entitled `Statistical Physics of Disordered Systems: from Real Materials to Optimization and Codes'. This issue should be a place for high quality original work. We stress the fact that we are interested in having the topic interpreted broadly: we would like to have contributions ranging from equilibrium and dynamical studies of spin glasses, glassy behaviour in amorphous materials, and low temperature physics, to applications in non-conventional areas such as error correcting codes, image analysis and reconstruction, optimization, and algorithms based on statistical mechanical ideas. We believe that we have arrived at a very exciting moment for the development of this multidisciplinary approach, and that this issue will be of a high standard and prove to be a very useful tool in the future. The Editorial Board has invited E Marinari, H Nishimori and F Ricci-Tersenghi to serve as Guest Editors for the Special Issue. Their criteria for acceptance of contributions are the following: bullet The subject of the paper should relate to the statistical physics of disordered systems. bullet Contributions will be refereed and processed according to the usual procedures of the journal. bullet Papers should be original (they should not be simply reviews of authors' own work that is already published elsewhere). bullet Review articles will be considered for inclusion in the Special Issue only in very special cases. The editors will analyse potential proposals of reviews, and if needed they will ask for some review contributions. The guidelines for the preparation of contributions are the following: bullet The deadline for submission of contributions is 31 March 2003. This deadline will allow the Special Issue to appear in about October 2003. bullet There is a nominal page limit of 15 printed pages (approximately 9000 words) per research contribution. The contributions that have been approved by the Guest Editors as review articles will have a limit of 30 printed pages (18000 words). Papers exceeding these limits may be accepted at the discretion of the Guest Editors. Further advice on publishing your work in Journal of Physics A: Mathematical and General may be found at www.iop.org/Journals/jphysa. bullet Contributions to the Special Issue should if possible be submitted electronically at www.iop.org/Journals/jphysa or by e-mail to jphysa@iop.org, quoting `JPhysA Special Issue -- Statistical Physics of Disordered Systems'. Submissions should ideally be in either standard LaTeX form or Microsoft Word. Please see the web site for further information on electronic submissions. bullet Authors unable to submit electronically may send hard copy contributions to: Publishing Administrators, Journal of Physics A, Institute of Physics Publishing, Dirac House, Temple Back, Bristol BS1 6BE, UK, enclosing the electronic code on floppy disk if available and quoting `JPhysA Special Issue -- Statistical Physics of Disordered Systems'. bullet All contributions should be accompanied by a read-me file or covering letter giving the postal and e-mail addresses for correspondence. The Publishing Office should be notified of any subsequent change of address. This Special Issue will be published in both paper and online editions of the journal. The corresponding author of each contribution will receive a complimentary copy of the issue in addition to the usual 25 free offprints of their article. E Marinari, H Nishimori and F Ricci-Tersenghi Guest Editors

Electrical conductivity behavior of Gum Arabic biopolymer-Fe3O4 nanocomposites

NASA Astrophysics Data System (ADS)

Bhakat, D.; Barik, P.; Bhattacharjee, A.

2018-01-01

Present work reports a study on the electrical conduction properties of some composites of Gum Arabic biopolymer and magnetite nanoparticles as host and guest, respectively, synthesized in different weight percentages. The nanocomposites are found to be non-extrinsic type of semiconductors with guest content dependent trap distribution of charge carriers. Conductivity of these materials increases with increasing guest content along with a concomitant decrease in the activation energy. Percolation theory has been employed for the analysis of the electrical conductivity results to explore the effect of the guest on the electrical conductivity of the host.

Editorial: Biotechnology Journal highlights from 2012 - AFOB and more.

PubMed

Peng, Judy

2013-01-01

Biotechnology Journal welcomed the Asian Federation of Biotechnology (AFOB) in 2012. Together with our existing affiliates, the European Biosafety Association (EBSA) and the EFB Section on Biochmical Engineering (ESBES), the Journal will provide unique bridge between Asian and Europen biotechnologists and bioengineers. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Using the Newspaper with Gifted Students.

ERIC Educational Resources Information Center

Guenther, John; And Others

This guide on using the newspaper is designed for secondary students in gifted education programs. Activities included in the guide can be used with a full range of subject areas, as students actually use the newspaper as the learning resource. The 50 activities are organized around the sections of the newspaper (general, news, editorials,…

49 CFR 179.101 - Individual specification requirements applicable to pressure tank car tanks.

Code of Federal Regulations, 2010 CFR

2010-10-01

... to pressure tank car tanks. 179.101 Section 179.101 Transportation Other Regulations Relating to... MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specifications for Pressure Tank Car Tanks (Classes DOT... tank car tanks. Editorial Note: At 66 FR 45186, Aug. 28, 2001, an amendment published amending a table...

Editorial Commentary on the Special Section

ERIC Educational Resources Information Center

Primavera, Judy; Lorion, Raymond P.; Blank, Michael B.

2012-01-01

It is both an honor and fitting that the "Journal of Community Psychology" presents to the discipline a series of papers included within a symposium entitled "Seymour Sarason in Memorial: Prospects for Community and Social Change" at the Biennial Conference on Community Research and Action on June 18th, 2011, in Chicago Illinois. These papers…

SCHOOL MAGAZINE FUNDAMENTALS, AND THE OFFICIAL CSPA SCOREBOOKS FOR GENERAL, LITERARY, AND LITERARY-ART MAGAZINES.

ERIC Educational Resources Information Center

JOHNSON, EVE BUNNELL, ED.

THIS PUBLICATION OF THE COLUMBIA SCHOLASTIC PRESS ASSOCIATION (CSPA) EXPLAINS THE BASIC PRINCIPLES GOVERNING THE WRITING, PUBLISHING, AND MANAGEMENT OF A STUDENT MAGAZINE. IT CONTAINS SECTIONS ON EDITING AND MAKE-UP, CONTENT (LITERARY, EDITORIAL, AND FEATURE MATERIAL), SCHOOL ACTIVITIES, AND ADVERTISING. AN EXPLANATION OF MAGAZINE RATINGS AND THE…

33 CFR 117.911 - Atlantic Intracoastal Waterway, Little River to Savannah River.

Code of Federal Regulations, 2014 CFR

2014-07-01

..., Little River to Savannah River. 117.911 Section 117.911 Navigation and Navigable Waters COAST GUARD... § 117.911 Atlantic Intracoastal Waterway, Little River to Savannah River. (a) General. Public vessels of.... 16, 1985] Editorial Note: For Federal Register citations affecting § 117.911, see the List of CFR...

33 CFR 117.911 - Atlantic Intracoastal Waterway, Little River to Savannah River.

Code of Federal Regulations, 2013 CFR

2013-07-01

..., Little River to Savannah River. 117.911 Section 117.911 Navigation and Navigable Waters COAST GUARD... § 117.911 Atlantic Intracoastal Waterway, Little River to Savannah River. (a) General. Public vessels of.... 16, 1985] Editorial Note: For Federal Register citations affecting § 117.911, see the List of CFR...

33 CFR 117.911 - Atlantic Intracoastal Waterway, Little River to Savannah River.

Code of Federal Regulations, 2010 CFR

2010-07-01

..., Little River to Savannah River. 117.911 Section 117.911 Navigation and Navigable Waters COAST GUARD... § 117.911 Atlantic Intracoastal Waterway, Little River to Savannah River. (a) General. Public vessels of.... 16, 1985] Editorial Note: For Federal Register citations affecting § 117.911, see the List of CFR...

33 CFR 117.911 - Atlantic Intracoastal Waterway, Little River to Savannah River.

Code of Federal Regulations, 2012 CFR

2012-07-01

..., Little River to Savannah River. 117.911 Section 117.911 Navigation and Navigable Waters COAST GUARD... § 117.911 Atlantic Intracoastal Waterway, Little River to Savannah River. (a) General. Public vessels of.... 16, 1985] Editorial Note: For Federal Register citations affecting § 117.911, see the List of CFR...

27 CFR 26.113 - Returns for prepayment of taxes.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2012-04-01 2012-04-01 false Returns for prepayment of taxes. 26.113 Section 26.113 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE.... 20, 1955] Editorial Note: For Federal Register citations affecting § 26.113, see the List of CFR...

27 CFR 26.113 - Returns for prepayment of taxes.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Returns for prepayment of taxes. 26.113 Section 26.113 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE.... 20, 1955] Editorial Note: For Federal Register citations affecting § 26.113, see the List of CFR...

27 CFR 26.113 - Returns for prepayment of taxes.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2011-04-01 2011-04-01 false Returns for prepayment of taxes. 26.113 Section 26.113 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE.... 20, 1955] Editorial Note: For Federal Register citations affecting § 26.113, see the List of CFR...

Have the Focus and Sophistication of Research in Health Education Changed?

ERIC Educational Resources Information Center

Merrill, Ray M.; Lindsay, Christopher A.; Shields, Eric C.; Stoddard, Julianne

2007-01-01

This study assessed the types of research and the statistical methods used in three representative health education journals from 1994 through 2003. Editorials, commentaries, program/practice notes, and perspectives represent 17.6% of the journals' content. The most common types of articles are cross-sectional studies (27.5%), reviews (23.2%), and…

17 CFR 259.602 - Form ID, uniform application for access codes to file on EDGAR.

Code of Federal Regulations, 2011 CFR

2011-04-01

...)—allows a filer, filing agent or training agent to log on to the EDGAR system, submit filings, and change... agent to change its Password. [69 FR 22710, Apr. 26, 2004] Editorial Note: For Federal Register... section of the printed volume and at at www.fdsys.gov. ...

17 CFR 259.602 - Form ID, uniform application for access codes to file on EDGAR.

Code of Federal Regulations, 2010 CFR

2010-04-01

...)—allows a filer, filing agent or training agent to log on to the EDGAR system, submit filings, and change... agent to change its Password. [69 FR 22710, Apr. 26, 2004] Editorial Note: For Federal Register... section of the printed volume and on GPO Access. ...

75 FR 24323 - American Society of Mechanical Engineers (ASME) Codes and New and Revised ASME Code Cases

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-04

... Approved for Incorporation by Reference Introductory text to paragraph Introductory text Revise to title... reference. ASME B&PV Code, Section III Introductory text to paragraph Introductory text Revise to clarify... editorial corrections and additions. Introductory text to paragraph Introductory text Revise to include the...

A Student-Centered Guest Lecturing: A Constructivism Approach to Promote Student Engagement

ERIC Educational Resources Information Center

Li, Lei; Guo, Rong

2015-01-01

Student engagement has become a big challenge in higher education, especially when distance learning is getting more and more popular. Guest lecturing is a popular method to bring relevance to the classroom and engage in students. Ground on the theory of constructivism, this paper introduces a student-centered guest lecturing that allows students…

Be My Guest: A Survey of Mass Communication Students' Perception of Guest Speakers

ERIC Educational Resources Information Center

Merle, Patrick F.; Craig, Clay

2017-01-01

The use of guest speakers as a pedagogical technique across disciplines at the college level is hardly novel. However, empirical assessment of journalism and mass communication students' perceptions of this practice has not previously been conducted. To fill this gap, this article presents results from an online survey specifically administered to…

Dynamic free energy surfaces for sodium diffusion in type II silicon clathrates.

PubMed

Slingsby, J G; Rorrer, N A; Krishna, L; Toberer, E S; Koh, C A; Maupin, C M

2016-02-21

Earth abundant semiconducting type II Si clathrates have attracted attention as photovoltaic materials due to their wide band gaps. To realize the semiconducting properties of these materials, guest species that arise during the synthesis process must be completely evacuated from the host cage structure post synthesis. A common guest species utilized in the synthesis of Si clathrates is Na (metal), which templates the clathrate cage formation. Previous experimental investigations have identified that it is possible to evacuate Na from type II clathrates to an occupancy of less than 1 Na per unit cell. This work investigates the energetics, kinetics, and resulting mechanism of Na diffusion through type II Si clathrates by means of biased molecular dynamics and kinetic Monte Carlo simulations. Well-tempered metadynamics has been used to determine the potential of mean force for Na moving between clathrate cages, from which the thermodynamic preferences and transition barrier heights have been obtained. Kinetic Monte Carlo simulations based on the metadynamics results have identified the mechanism of Na diffusion in type II Si clathrates. The overall mechanism consists of a coupled diffusive process linked via electrostatic guest-guest interactions. The large occupied hexakaidechedral cages initially empty their Na guests to adjacent empty large cages, thereby changing the local electrostatic environment around the occupied small pentagonal dodecahedral cages and increasing the probability of Na guests to leave the small cages. This coupled process continues through the cross-over point that is identified as the point where large and small cages are equally occupied by Na guests. Further Na removal results in the majority of guests residing in the large cages as opposed to the small cages, in agreement with experiments, and ultimately a Na free structure.

Perspectives of host faculty and trainees on international visiting faculty to paediatric academic departments in East Africa

PubMed Central

Russ, Christiana M; Ganapathi, Lakshmi; Marangu, Diana; Silverman, Melanie; Kija, Edward; Bakeera-Kitaka, Sabrina; Laving, Ahmed

2016-01-01

Background Investments in faculty exchanges to build physician workforce capacity are increasing. Little attention has been paid to the expectations of host institution faculty and trainees. This prospective qualitative research study explored faculty and resident perspectives about guest faculty in paediatric departments in East Africa, asking (1) What are the benefits and challenges of hosting guest faculty, (2) What factors influence the effectiveness of faculty visits and (3) How do host institutions prepare for faculty visits? Methods We recruited 36 faculty members and residents from among four paediatric departments in East Africa to participate in semistructured interviews which were audio recorded and transcribed. Data were qualitatively analysed using principles of open coding and thematic analysis. We achieved saturation of themes. Results Benefits of faculty visits varied based on the size and needs of host institutions. Emergent themes included the importance of guest faculty time commitment, and mutual preparation to ensure that visit goals and scheduling met host needs. We documented conflicts that developed around guest emotional responses and ethical approaches to clinical resource limitations, which some hosts tried to prepare for and mitigate. Imbalance in resources led to power differentials; some hosts sought partnerships to re-establish control over the process of having guests. Conclusions We identified that guest faculty can assist paediatric institutions in building capacity; however, effective visits require: (1) mutually agreed on goals with appropriate scheduling, visit length and commitment to ensure that the visits meet the host's needs, (2) careful selection and preparation of guest faculty to meet the host's goals, (3) emotional preparation by prospective guests along with host orientation to clinical work in the host's setting and (4) attention to funding sources for the visit and mitigation of resulting power differentials. PMID:28588960

Photocaged Competitor Guests: A General Approach Toward Light-Activated Cargo Release From Cucurbiturils.

PubMed

Romero, Miguel A; Basílio, Nuno; Moro, Artur J; Domingues, Mara; González-Delgado, José A; Arteaga, Jesús F; Pischel, Uwe

2017-09-21

A general approach toward the light-induced guest release from cucurbit[7]uril by means of a photoactivatable competitor was devised. An o-nitrobenzyl-caged competitor is photolyzed to generate a competitive guest that can displace cargo from the host macrocycle solely based on considerations of chemical equilibrium. With this method the release of terpene guests from inclusion complexes with cucurbit[7]uril was demonstrated. The binding of the herein investigated terpenes, all being lead fragrant components in essential oils, has been characterized for the first time. They feature binding constants of up to 10 8  L mol -1 and a high differential binding selectivity (spanning four orders of magnitude for the binding constants for the particular set of terpenes). By fine-tuning the photoactivatable competitor guest, selective and also sequential release of the terpenes was achieved. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Structural transitions and guest/host complexing of liquid crystal helical nanofilaments induced by nanoconfinement.

PubMed

Kim, Hanim; Ryu, Seong Ho; Tuchband, Michael; Shin, Tae Joo; Korblova, Eva; Walba, David M; Clark, Noel A; Yoon, Dong Ki

2017-02-01

A lamellar liquid crystal (LC) phase of certain bent-core mesogenic molecules can be grown in a manner that generates a single chiral helical nanofilament in each of the cylindrical nanopores of an anodic aluminum oxide (AAO) membrane. By introducing guest molecules into the resulting composite chiral nanochannels, we explore the structures and functionality of the ordered guest/host LC complex, verifying the smectic-like positional order of the fluidic nematic LC phase, which is obtained by the combination of the LC organization and the nanoporous AAO superstructure. The guest nematic LC 4'- n -pentyl-4-cyanobiphenyl is found to form a distinctive fluid layered ordered LC complex at the nanofilament/guest interface with the host 1,3-phenylene bis[4-(4-nonyloxyphenyliminomethyl)benzoate], where this interface contacts the AAO cylinder wall. Filament growth form is strongly influenced by mixture parameters and pore dimensions.

Supramolecular guests in solvent driven block copolymer assembly: From internally structured nanoparticles to micelles

PubMed Central

Klinger, Daniel; Robb, Maxwell J.; Spruell, Jason M.; Lynd, Nathaniel A.; Hawker, Craig J.

2014-01-01

Supramolecular interactions between different hydrogen-bonding guests and poly(2-vinyl pyridine)-block-poly (styrene) can be exploited to prepare remarkably diverse self-assembled nanostructures in dispersion from a single block copolymer (BCP). The characteristics of the BCP can be efficiently controlled by tailoring the properties of a guest which preferentially binds to the P2VP block. For example, the incorporation of a hydrophobic guest creates a hydrophobic BCP complex that forms phase separated nanoparticles upon self-assembly. Conversely, the incorporation of a hydrophilic guest results in an amphiphilic BCP complex that forms spherical micelles in water. The ability to tune the self-assembly behavior and access dramatically different nanostructures from a single BCP substrate demonstrates the exceptional versatility of the self-assembly of BCPs driven by supramolecular interactions. This approach represents a new methodology that will enable the further design of complex, responsive self-assembled nanostructures. PMID:25525473

Structural transitions and guest/host complexing of liquid crystal helical nanofilaments induced by nanoconfinement

PubMed Central

Kim, Hanim; Ryu, Seong Ho; Tuchband, Michael; Shin, Tae Joo; Korblova, Eva; Walba, David M.; Clark, Noel A.; Yoon, Dong Ki

2017-01-01

A lamellar liquid crystal (LC) phase of certain bent-core mesogenic molecules can be grown in a manner that generates a single chiral helical nanofilament in each of the cylindrical nanopores of an anodic aluminum oxide (AAO) membrane. By introducing guest molecules into the resulting composite chiral nanochannels, we explore the structures and functionality of the ordered guest/host LC complex, verifying the smectic-like positional order of the fluidic nematic LC phase, which is obtained by the combination of the LC organization and the nanoporous AAO superstructure. The guest nematic LC 4′-n-pentyl-4-cyanobiphenyl is found to form a distinctive fluid layered ordered LC complex at the nanofilament/guest interface with the host 1,3-phenylene bis[4-(4-nonyloxyphenyliminomethyl)benzoate], where this interface contacts the AAO cylinder wall. Filament growth form is strongly influenced by mixture parameters and pore dimensions. PMID:28246642

EDITORIAL: Message from the Editor Message from the Editor

NASA Astrophysics Data System (ADS)

Thomas, Paul

2010-02-01

This year Nuclear Fusion celebrates its fiftieth anniversary. This has been marked by the January special edition, containing papers presented at the plenary and celebratory evening session of the 22nd Fusion Energy Conference at Geneva. These papers underline the enormous progress that has been made in the last 50 years both in experiment and theory. Whilst the technical challenges that we face are still formidable, they are largely concerned with engineering a fusion reactor rather than fundamental plasma physics. In my editorial of a year ago, I remarked on the price of oil and the incentive that it gives to develop nuclear fusion into a viable energy source. This last year, attention has shifted somewhat from the markets to the environment and the Copenhagen climate summit in particular. The timescale for action on the environment is much shorter than we can possibly match and so we can only play our part towards developing long term solutions. Our responsibility is to present a programme that has the clear goal in developing a sustainable source of energy and, as the next step, make an unambiguous success of ITER. The Nuclear Fusion journal has continued to make an important contribution to the research programme and has maintained its position as the leading journal in the field. The journal depends entirely on its authors and referees and so I would like to thank them all for their work in 2009 and look forward to a continuing, successful collaboration in 2010. Refereeing The Nuclear Fusion Editorial Office understands how much effort is required of our referees. The Editorial Board decided that an expression of thanks to our most loyal referees is appropriate and so, since January 2005, we have been offering the top ten most active referees over the past year a personal subscription to Nuclear Fusion with electronic access for one year, free of charge. This year, seven of the top referees have reviewed four or more manuscripts in the period November 2008 to November 2009 and provided particularly detailed advice to the authors. The other three have been very helpful in 'minority fields'. We have excluded our Board members, Guest Editors of special editions and those referees who were already listed in the last four years. Guest Editors' work on papers submitted to their Special Issues is also excluded from consideration. The following people have been selected: Tomonori Takizuka, JAEA-Naka Fusion Institute, Japan Rudolf Neu, Max-Planck-Institut für Plasmaphysik, Germany Sibylle Guenter, Max-Planck-Institut für Plasmaphysik, Germany Taik-Soo Hahm, Princeton Plasma Physics Laboratory, United States David R. Mikkelsen, Princeton Plasma Physics Laboratory, United States Peter C. de Vries, EURATOM/UKAEA Fusion Association, United Kingdom Yasuhiro Suzuki, National Institute for Fusion Science, Japan Jerzy Wolowski, Institute of Plasma Physics and Laser Microfusion, Poland Tetsuo Tanabe, Kyushu University, Japan Yasuyuki Yagi, National Institute of Advanced Industrial Science and Technology, Japan Congratulations and many, many thanks! The Guest Editors of special editions deserve a special mention for the excellent help that they have given us. They are: Taik-Soo Hahm, Princeton Plasma Physics Laboratory, United States, Special Issue on H-Mode Physics and Transport Barriers Yaroslav Kolesnichenko, Institute for Nuclear Research, Ukraine, Special Issue on Energetic Particles in Magnetic Confinement Systems Kimitaka Itoh, National Institute for Fusion Science, Japan and Howard R. Wilson, University of York, UK, Special Issue on Plasma Instabilities Bernhard Unterberg, Forschungszentrum Juelich, Germany, Special Issue on Stochastic Fusion Plasma In addition, there is a group of several hundred referees who have helped us in the past year to maintain the high scientific standard of Nuclear Fusion. At the end of this issue we give the full list of all referees for 2009. Our thanks to them! Authors The winner of the 2009 Nuclear Fusion award was Steven A. Sabbagh et al for the paper entitled 'Resistive wall stabilized operation in rotating high beta NSTX plasmas' (Nucl. Fusion 46 635-644). Reviews Last year I announced a revival of Nuclear Fusion Reviews, following a decision by the Board of Editors. 'A review of zonal flow experiments', by Akihide Fujisawa was the first fruit of this. In 2010, we are expecting to publish further review articles, the first of which is entitled 'Gyrokinetic simulations of turbulent transport' by Xavier Garbet, Yasuhiro Idomura, Laurent Villard and Tomo-Hiko Watanabe. Letters At the 2009 Board of Editors Meeting in Atlanta, the current letters procedure was summarized and it was noted that the peer review time for Letters is quite variable. Some are accepted within a month of submission, others take longer. Since the purpose of Letters is to provide a route for rapid communication, this is quite an important matter. It was agreed that the Board of Editors would play a more active role in the Letter approval process. If a reviewer asks for a second revision the Editor or a Board of Editors member will be queried as to whether the submission should still be treated as a Letter rather than a regular Paper. The Board of Editors The following Board of Editors members reached the end of their term in 2009: Amanda Hubbard, Yaroslav Kolesnichenko, Kunioki Mima, Boris Sharkov and Michael Ulrickson. On behalf of the Nuclear Fusion Office and the Chairman of the Board of Editors, Mitsuru Kikuchi, I would like to thank them for their efforts in support of the journal. At the same time, we welcomed: Hiroshi Azechi, Xuru Duan, Richard Hawryluk, Sergey Konovalov, Bruce Lipschultz, Peter Norreys, Francesco Romanelli, Tony Taylor and Hartmut Zohm. I am sure that such an illustrious group does not need any introduction to the readers of Nuclear Fusion and I am confident that the new members can only further the success of the journal. It is with great sadness that I have to note the passing away of the following former members of the Board of Editors: Ravindra Sudan (1975 to 1984), Joe Di Marco (1984 to 1991) and Roy Bickerton (1975 to 1986). The Nuclear Fusion Office and IOP Publishing Just as the journal depends on the authors and referees, so its success is also due to the tireless and largely unsung efforts of the Nuclear Fusion Office in Vienna and IOP Publishing in Bristol. I would like to express my personal thanks to Maria Bergamini-Roedler, Katja Haslinger, Sophy Le Masurier, Yasmin McGlashan, Caroline Wilkinson, Sarah Ryder, Rachael Kriefman and Katie Gerrard for the support that they have given to me, the authors and the referees. Season's Greetings The January special edition delayed this editorial for a month. Nevertheless, I would like belatedly to wish our readers, authors, referees and Board of Editors the season's greetings and thank them for their contributions to Nuclear Fusion in 2009.

Tuning Proton Conductivity by Interstitial Guest Change in Size-Adjustable Nanopores of a CuI -MOF: A Potential Platform for Versatile Proton Carriers.

PubMed

Khatua, Sajal; Kumar Bar, Arun; Konar, Sanjit

2016-11-02

By exploiting the breathing behavior of nanopores, we have studied for the first time the dependency of the guest-induced proton conductivity of an interpenetrated Cu I metal-organic framework (Cu I -MOF, [1]) on various guest molecules. Proton conductivities of over 10 -3  S cm -1 under humid conditions were induced by a series of guest molecules, namely N,N-dimethylformamide, dimethyl sulfoxide, diethylamine, 1,4-dinitrobenzene, nitrobenzene, pyridine, and 1H-1,2,4-triazole. A detailed investigation of the guest-incorporated complexes revealed that low-energy proton conduction occurs under humid conditions through the Grotthuss mechanism in [1⊃NB] and through the vehicle mechanism in the rest of the complexes. Single-point energy computations revealed considerable stabilization upon guest encapsulation. To the best of our knowledge, [1] represents the first example in which considerably high protonic conductivity is triggered upon the facile incorporation of small molecules of such a variety. The investigation portrayed herein may be a stepping stone towards the rational design of proton-conducting materials for practical applications. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bottom-up Formation of Carbon-Based Structures with Multilevel Hierarchy from MOF-Guest Polyhedra.

PubMed

Wang, Tiesheng; Kim, Hyun-Kyung; Liu, Yingjun; Li, Weiwei; Griffiths, James T; Wu, Yue; Laha, Sourav; Fong, Kara D; Podjaski, Filip; Yun, Chao; Kumar, R Vasant; Lotsch, Bettina V; Cheetham, Anthony K; Smoukov, Stoyan K

2018-05-16

Three-dimensional carbon-based structures have proven useful for tailoring material properties in structural mechanical and energy storage applications. One approach to obtain them has been by carbonization of selected metal-organic frameworks (MOFs) with catalytic metals, but this is not applicable to most common MOF structures. Here, we present a strategy to transform common MOFs, by guest inclusions and high-temperature MOF-guest interactions, into complex carbon-based, diatom-like, hierarchical structures (named for the morphological similarities with the naturally existing diatomaceous species). As an example, we introduce metal salt guests into HKUST-1-type MOFs to generate a family of carbon-based nano-diatoms with two to four levels of structural hierarchy. We report control of the morphology by simple changes in the chemistry of the MOF and guest, with implications for the formation mechanisms. We demonstrate that one of these structures has unique advantages as a fast-charging lithium-ion battery anode. The tunability of composition should enable further studies of reaction mechanisms and result in the growth of a myriad of unprecedented carbon-based structures from the enormous variety of currently available MOF-guest candidates.

Calculating binding free energies of host-guest systems using the AMOEBA polarizable force field.

PubMed

Bell, David R; Qi, Rui; Jing, Zhifeng; Xiang, Jin Yu; Mejias, Christopher; Schnieders, Michael J; Ponder, Jay W; Ren, Pengyu

2016-11-09

Molecular recognition is of paramount interest in many applications. Here we investigate a series of host-guest systems previously used in the SAMPL4 blind challenge by using molecular simulations and the AMOEBA polarizable force field. The free energy results computed by Bennett's acceptance ratio (BAR) method using the AMOEBA polarizable force field ranked favorably among the entries submitted to the SAMPL4 host-guest competition [Muddana, et al., J. Comput.-Aided Mol. Des., 2014, 28, 305-317]. In this work we conduct an in-depth analysis of the AMOEBA force field host-guest binding thermodynamics by using both BAR and the orthogonal space random walk (OSRW) methods. The binding entropy-enthalpy contributions are analyzed for each host-guest system. For systems of inordinate binding entropy-enthalpy values, we further examine the hydrogen bonding patterns and configurational entropy contribution. The binding mechanism of this series of host-guest systems varies from ligand to ligand, driven by enthalpy and/or entropy changes. Convergence of BAR and OSRW binding free energy methods is discussed. Ultimately, this work illustrates the value of molecular modelling and advanced force fields for the exploration and interpretation of binding thermodynamics.

Marine Corps Financial Management Officer Training in the 1990’s

DTIC Science & Technology

1990-06-01

tiny finance section within the Quartermaster Department developed. The National Security Act of 1947 first established the comptroller of the...Accounting issues 1010-1030 Prompt PavCDR Eberling/To discuss provisions of Prompt Pay Act 1030-1100 Case Study #1 1100-1210 Lunch 1210-1400 Guest...discuss the importance of unfunded requirements submissions and the techniques utilized in successful funding of requirements Budget Review: - Be able

The ICMJE Recommendations and pharmaceutical marketing--strengths, weaknesses and the unsolved problem of attribution in publication ethics.

PubMed

Matheson, Alastair

2016-04-04

The International Committee of Medical Journal Editors (ICMJE) Recommendations set ethical and editorial standards for article publication in most leading medical journals. Here, I examine the strengths and weaknesses of the Recommendations in the prevention of commercial bias in industry-financed journal literature, on three levels - scholarly discourse, article content, and article attribution. With respect to overall discourse, the most important measures in the ICMJE Recommendations are for enforcing clinical trial registration and controlling duplicate publication. With respect to article content, the ICMJE promotes stringent author accountability and adherence to established reporting standards. However, the ICMJE accepts the use of commercial editorial teams to produce manuscripts, which is a potential source of bias, and accepts private company ownership and analysis of clinical trial data. New ICMJE guidance on data sharing will address but not eliminate problems of commercial data access. With respect to attribution, the Recommendations oppose guest authorship and encourage clear documentation of author contributions. However, they exclude writers from coauthorship; provide no specific advice on the attribution of commercial literature, for instance with respect to company authorship, author sequence or prominent commercial labeling; and endorse the use of fine print and euphemism. The ICMJE requires detailed author interest disclosures, but overlooks the interests of non-authors and companies, and does not recommend that interests most salient to the publication are highlighted. Together, these weaknesses facilitate "advocacy"-based marketing, in which literature planned, financed and produced by companies is fronted by academics, enabling commercial messages to be presented to customers by their respected clinical peers rather than companies themselves. The ICMJE Recommendations set important research and reporting standards, without which commercial bias would likely be a significantly greater problem than it is today. However, they also support practices of commercial data control, content development and attribution that run counter to science's values of openness, objectivity and truthfulness. These weaknesses could be addressed with appropriate modifications to the Recommendations. The ICMJE should also disclose its own commercial interests and funding - not least because publishing organizations that finance it and pay the salaries of some member editors derive substantial revenues from industry.

Hotel smoking policies and their implementation: a survey of California hotel managers.

PubMed

Zakarian, Joy M; Quintana, Penelope J E; Winston, Carl H; Matt, Georg E

2017-01-01

Most states in the U.S. permit hotels to allow smoking in some guest rooms, and only five (Indiana, Michigan, North Dakota, Vermont, and Wisconsin) require that all hotel and motel rooms be 100% smoke-free (State and local 100% smokefree hotel and motel guest room laws enacted as of July 3, 2017). Little is known, however, about how hotels' smoking policies have been implemented. This study examined hotels' smoking policies and their implementation. A telephone survey of a random sample of 383 California hotel managers was conducted. Overall, 60.6% of hotels reported that smoking was prohibited in all guest rooms, and 4.7% reported that smoking was prohibited everywhere on their property. While California law permitted smoking in up to 65% of guest rooms, only 6.9% of rooms were reported as smoking-permitted. Over 90% of hotels had smoking rooms scattered among nonsmoking rooms, and about half of the smoking hotels reported that guests requesting either smoking or nonsmoking rooms were sometimes assigned to the other room type. When guests smoked in nonsmoking rooms fees could be substantial, but were often uncollected. Hotel smoking policies and their implementation fall short of protecting nonsmoking guests and workers from exposure to secondhand and thirdhand smoke. Complete indoor smoking bans for all hotels are needed to close existing loopholes. Nonsmokers who wish to protect themselves from exposure to tobacco smoke should avoid hotels that permit smoking and instead stay in completely smoke-free hotels.

Guest Controlled Nonmonotonic Deep Cavity Cavitand Assembly State Switching.

PubMed

Tang, Du; Barnett, J Wesley; Gibb, Bruce C; Ashbaugh, Henry S

2017-11-30

Octa-acid (OA) and tetra-endo-methyl octa-acid (TEMOA) are water-soluble, deep-cavity cavitands with nanometer-sized nonpolar pockets that readily bind complementary guests, such as n-alkanes. Experimentally, OA exhibits a progression of 1:1 to 2:2 to 2:1 host/guest complexes (X:Y where X is the number of hosts and Y is the number of guests) with increasing alkane chain length from methane to tetradecane. Differing from OA only by the addition of four methyl groups ringing the portal of the pocket, TEMOA exhibits a nonmonotonic progression of assembly states from 1:1 to 2:2 to 1:1 to 2:1 with increasing guest length. Here we present a systematic molecular simulation study to parse the molecular and thermodynamic determinants that distinguish the succession of assembly stoichiometries observed for these similar hosts. Potentials of mean force between hosts and guests, determined via umbrella sampling, are used to characterize association free energies. These free energies are subsequently used in a reaction network model to predict the equilibrium distributions of assemblies. Our models accurately reproduce the experimentally observed trends, showing that TEMOA's endo-methyl units constrict the opening of the binding pocket, limiting the conformations available to bound guests and disrupting the balance between monomeric complexes and dimeric capsules. The success of our simulations demonstrate their utility at interpreting the impact of even simple chemical modifications on supramolecular assembly and highlight their potential to aid bottom-up design.

Force and Stress along Simulated Dissociation Pathways of Cucurbituril-Guest Systems.

PubMed

Velez-Vega, Camilo; Gilson, Michael K

2012-03-13

The field of host-guest chemistry provides computationally tractable yet informative model systems for biomolecular recognition. We applied molecular dynamics simulations to study the forces and mechanical stresses associated with forced dissociation of aqueous cucurbituril-guest complexes with high binding affinities. First, the unbinding transitions were modeled with constant velocity pulling (steered dynamics) and a soft spring constant, to model atomic force microscopy (AFM) experiments. The computed length-force profiles yield rupture forces in good agreement with available measurements. We also used steered dynamics with high spring constants to generate paths characterized by a tight control over the specified pulling distance; these paths were then equilibrated via umbrella sampling simulations and used to compute time-averaged mechanical stresses along the dissociation pathways. The stress calculations proved to be informative regarding the key interactions determining the length-force profiles and rupture forces. In particular, the unbinding transition of one complex is found to be a stepwise process, which is initially dominated by electrostatic interactions between the guest's ammoniums and the host's carbonyl groups, and subsequently limited by the extraction of the guest's bulky bicyclooctane moiety; the latter step requires some bond stretching at the cucurbituril's extraction portal. Conversely, the dissociation of a second complex with a more slender guest is mainly driven by successive electrostatic interactions between the different guest's ammoniums and the host's carbonyl groups. The calculations also provide information on the origins of thermodynamic irreversibilities in these forced dissociation processes.

A note on the history of experimental and theoretical research into molecular attractive forces between solids

NASA Astrophysics Data System (ADS)

Danilova, N. P.

2015-09-01

From the Editorial Board. In a brief followup to the talk by E I Kats on "Van der Waals, Casimir, and Lifshitz forces in soft matter" (see pp. 892 - 896 of this issue) at the E M Lifshitz centennial session of the Physical Sciences Division of the Russian Academy of Sciences, an interesting and instructive story was told by Nina Petrovna Danilova (Department of Low Temperature Physics and Superconductivity, Faculty of Physics, Moscow State University) of how E M Lifshitz was enlisted to explain I I Abrikosova's and B V Derjaguin's experimental results. The Editorial Board of Uspekhi Fizicheskikh Nauk (UFN) [Physics-Uspekhi] journal found the story appropriate to be published in the "Letters to the Editor" section of UFN in a jubilee selection of works marking the centennial of E M Lifshitz' birth.

Altered stimulation technique and fluid shows improved canyon sand production in Flowers West and Guest Units, Stonewall County, Texas

DOE Office of Scientific and Technical Information (OSTI.GOV)

Pai, V.J.

1978-01-01

In order to combat falling productivity and increased water production in the W. Flowers and Guest (Canyon Sand) fields, a new approach to stimulation technique and fluid had to be initiated. It was suspected that many pre-1975 frac jobs probably were lost into unproductive zones resulting in very little stimulation of the actual pay section. To combat this situation, the frac fluid was changed to a very high viscosity cross-linked CMC-based polymer gel. The base fluid was 2% KCl water treated with de-emulsifiers. A detailed computerized study was conducted to determine a near optimum treatment design. Fluid volumes were selectedmore » based on frac lengths, which provided the most economically feasible productivity increase ratios (J/J/sub 0/), and proppant concentrations were analyzed so as to afford the optimum permeability contrasts. Sand concentrations were increased, and 10-20 mesh sand was used.« less

77 FR 23370 - Federal Acquisition Regulation; Technical Amendments

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-18

... CONTRACT CLAUSES 52.212-5 [Amended] 0 2. Amend section 52.212-5 by removing from paragraph (b)(7) ``(Jan... ADMINISTRATION 48 CFR Parts 1 and 52 [FAC 2005-58; Item IV; Docket 2012-0079; Sequence 2] Federal Acquisition... update certain elements in 48 CFR parts 1 and 52, this document makes editorial changes to the FAR. List...

27 CFR 27.58 - Containers of 1 gallon (3.785 liters) or less.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2011-04-01 2011-04-01 false Containers of 1 gallon (3.785 liters) or less. 27.58 Section 27.58 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO.... 15, 1975] Editorial Note: For Federal Register citations affecting § 27.58, see the List of CFR...

27 CFR 27.58 - Containers of 1 gallon (3.785 liters) or less.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Containers of 1 gallon (3.785 liters) or less. 27.58 Section 27.58 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO.... 15, 1975] Editorial Note: For Federal Register citations affecting § 27.58, see the List of CFR...

27 CFR 27.58 - Containers of 1 gallon (3.785 liters) or less.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2012-04-01 2012-04-01 false Containers of 1 gallon (3.785 liters) or less. 27.58 Section 27.58 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO.... 15, 1975] Editorial Note: For Federal Register citations affecting § 27.58, see the List of CFR...

Energetics of small molecule and water complexation in hydrophobic calixarene cavities.

PubMed

Notestein, Justin M; Katz, Alexander; Iglesia, Enrique

2006-04-25

Calixarenes grafted on silica are energetically uniform hosts that bind aromatic guests with 1:1 stoichiometry, as shown by binding energies that depend upon the calixarene upper rim composition but not on their grafted surface density (0.02-0.23 nm(-2)). These materials are unique in maintaining a hydrophilic silica surface, as probed by H2O physisorption measurements, while possessing a high density of hydrophobic binding sites that are orthogonal to the silica surface below them. The covalently enforced cone-shaped cavities and complete accessibility of these rigidly grafted calixarenes allow the first unambiguous measurements of the thermodynamics of guest interaction with the same calixarene cavities in aqueous solution and vapor phase. Similar to adsorption into nonpolar protein cavities, adsorption into these hydrophobic cavities from aqueous solution is enthalpy-driven, which is in contrast to entropy-driven adsorption into water-soluble hydrophobic hosts such as beta cyclodextrin. The adsorption thermodynamics of several substituted aromatics from vapor and liquid are compared by (i) describing guest chemical potentials relative to pure guest, which removes differences among guests because of aqueous solvation and van der Waals contacts in the pure condensed phase, and (ii) passivating residual guest binding sites on exposed silica, titrated by water during adsorption from aqueous solution, using inorganic salts before vapor adsorption. Adsorption isotherms depend only upon the saturation vapor pressure of each guest, indicating that guest binding from aqueous or vapor media is controlled by van der Waals contacts with hydrophobic calixarene cavities acting as covalently assembled condensation nuclei, without apparent contributions from CH-pi or other directional interactions. These data also provide the first direct quantification of free energies for interactions of water with the calixarene cavity interior. The calixarene-water interface is stabilized by approximately 20 kJ/mol relative to the water-vapor interface, indicating that water significantly competes with the aromatic guests for adsorption at these ostensibly hydrophobic cavities. This result is useful for understanding models of water interactions with other concave hydrophobic surfaces, including those commonly observed within proteins.

Effects of multiple pathways on excited-state energy flow in self-assembled wheel-and-spoke light-harvesting architectures.

PubMed

Song, Hee-eun; Kirmaier, Christine; Schwartz, Jennifer K; Hindin, Eve; Yu, Lianhe; Bocian, David F; Lindsey, Jonathan S; Holten, Dewey

2006-10-05

Static and time-resolved optical measurements are reported for three cyclic hexameric porphyrin arrays and their self-assembled complexes with guest chromophores. The hexameric hosts contain zinc porphyrins and 0, 1, or 2 free base (Fb) porphyrins (denoted Zn(6), Zn(5)Fb, or Zn(4)Fb(2), respectively). The guest is a core-modified (O replacing one of the four N atoms) dipyridyl-substituted Fb porphyrin (DPFbO) that coordinates to zinc porphyrins of a host via pyridyl-zinc dative bonding. Each architecture is designed to have a gradient of excited-state energies for excitation funneling among the weakly coupled constituents of the host to the guest. Energy transfer to the lowest-energy chromophore(s) (coordinated zinc porphyrins or Fb porphyrins) within a hexameric host occurs primarily via a through-bond (TB) mechanism, is rapid ( approximately 40 ps), and is essentially quantitative (>or=98%). Energy transfer from a pyridyl-coordinated zinc porphyrin of the host to the guest in the Zn(6)*DPFbO complex has a yield of approximately 75%, a rate constant of approximately (0.7 ns)(-1), and significant Förster through-space (TS) character. In the case of Zn(5)Fb*DPFbO, which has an additional TS route via the Fb porphyrin with a rate constant of approximately (20 ns)(-1), the yield of energy transfer to the guest is somewhat lower ( approximately 50%) than that for Zn(6)*DPFbO. Complex Zn(4)Fb(2)*DPFbO has an identical TS pathway via the Fb porphyrin plus an additional TS pathway involving the second Fb porphyrin (closer to the guest) with a rate constant of approximately (0.5 ns)(-1). This complex exhibits an energy-transfer yield to the guest that is significantly enhanced over that for Zn(5)Fb*DPFbO and comparable to that for Zn(6)*DPFbO. Collectively, the results for the various arrays suggest designs for similar host-guest complexes that are expected to exhibit much more efficient light harvesting and excitation trapping at the central guest chromophore.

The 1:1 inclusion compounds zolmitriptan-benzene and zolmitriptan-phenol.

PubMed

Swamy, G Y S K; Sridhar, B; Ravikumar, K; Krishnan, Harihara

2007-07-01

In the benzene and phenol solvates of (S)-4-{3-[2-(dimethylamino)ethyl]-1H-indol-5-ylmethyl}oxazolidin-2-one, viz. C(16)H(21)N(3)O(2) x C(6)H(6), (I), and C(16)H(21)N(3)O(2) x C(6)H(5)OH, (II), the host molecule has three linked residues, namely a planar indole ring system, an ethylamine side chain and an oxazolidinone system. It has comparable features to that of sumatriptan, although the side-chain orientations of (I) and (II) differ from those of sumatriptan. Both (I) and (II) have host-guest-type structures. The host molecule in (I) and (II) has an L-shaped form, with the oxazolidinone ring occupying the base and the remainder of the molecule forming the upright section. In (I), each benzene guest molecule is surrounded by four host molecules, and these molecules are linked by a combination of N-H...N, N-H...O and C-H...O hydrogen bonds into chains of edge-fused R(4)(4)(33) rings. In (II), two independent molecules are present in the asymmetric unit, with similar conformations. The heterocyclic components are connected through N-H...N, N-H...O and C-H...O interactions to form chains of edge-fused R(6)(4)(38) rings, from which the phenol guest molecules are pendent, linked by O-H...O hydrogen bonds. The structures are further stabilized by extensive C-H...pi interactions.

Predictive validity evidence for medical education research study quality instrument scores: quality of submissions to JGIM's Medical Education Special Issue.

PubMed

Reed, Darcy A; Beckman, Thomas J; Wright, Scott M; Levine, Rachel B; Kern, David E; Cook, David A

2008-07-01

Deficiencies in medical education research quality are widely acknowledged. Content, internal structure, and criterion validity evidence support the use of the Medical Education Research Study Quality Instrument (MERSQI) to measure education research quality, but predictive validity evidence has not been explored. To describe the quality of manuscripts submitted to the 2008 Journal of General Internal Medicine (JGIM) medical education issue and determine whether MERSQI scores predict editorial decisions. Cross-sectional study of original, quantitative research studies submitted for publication. Study quality measured by MERSQI scores (possible range 5-18). Of 131 submitted manuscripts, 100 met inclusion criteria. The mean (SD) total MERSQI score was 9.6 (2.6), range 5-15.5. Most studies used single-group cross-sectional (54%) or pre-post designs (32%), were conducted at one institution (78%), and reported satisfaction or opinion outcomes (56%). Few (36%) reported validity evidence for evaluation instruments. A one-point increase in MERSQI score was associated with editorial decisions to send manuscripts for peer review versus reject without review (OR 1.31, 95%CI 1.07-1.61, p = 0.009) and to invite revisions after review versus reject after review (OR 1.29, 95%CI 1.05-1.58, p = 0.02). MERSQI scores predicted final acceptance versus rejection (OR 1.32; 95% CI 1.10-1.58, p = 0.003). The mean total MERSQI score of accepted manuscripts was significantly higher than rejected manuscripts (10.7 [2.5] versus 9.0 [2.4], p = 0.003). MERSQI scores predicted editorial decisions and identified areas of methodological strengths and weaknesses in submitted manuscripts. Researchers, reviewers, and editors might use this instrument as a measure of methodological quality.

Nanoparticles functionalized with supramolecular host-guest systems for nanomedicine and healthcare.

PubMed

Wu, Zilong; Song, Nan; Menz, Ryan; Pingali, Bharadwaj; Yang, Ying-Wei; Zheng, Yuebing

2015-05-01

Synthetic macrocyclic host compounds can interact with suitable guest molecules via noncovalent interactions to form functional supramolecular systems. With the synergistic integration of the response of molecules and the unique properties at the nanoscale, nanoparticles functionalized with the host-guest supramolecular systems have shown great potentials for a broad range of applications in the fields of nanoscience and nanotechnology. In this review article, we focus on the applications of the nanoparticles functionalized with supramolecular host-guest systems in nanomedicine and healthcare, including therapeutic delivery, imaging, sensing and removal of harmful substances. A large number of examples are included to elucidate the working mechanisms, advantages, limitations and future developments of the nanoparticle-supramolecule systems in these applications.

Ancient Guest Stars as harbingers of neutron star formation

NASA Astrophysics Data System (ADS)

Wang, Zhen-Ru

The well-known AD 1006, 1054, 1572, and 1604 were described as "Guest Stars" by Chinese, Japanese and Korean. In most cases, it might thus be possible to expect a Guest Star to be a term for supernova or nova. There are a lot of records concerning ancient Guest Stars in Chinese historical books. Two catalogues were compiled by Xi (1955) and Xi and Bo (1965, 1966) that listed 90 probable novae or supernovae observed between 1400 BC and AD 1700. Clark and Stephenson (1977), Ho (1962) and Kanda (1935) collected more or less similar records. Among all the historical records more than 80% are from China. The discussion presented in this paper is based on them.

Promoting health: media advocacy opportunities in English- and Spanish-language masthead editorials.

PubMed

Lingas, Elena O

2013-01-01

This study examines two newspapers' editorial coverage of issues related to the Healthy People 2010 focus areas and compares the two newspapers. A qualitative study. Two Los Angeles, California, newspapers. The masthead editorials of the Los Angeles Times and La Opinión in the year following the release of Healthy People 2010. A structured data abstraction instrument was used for descriptive coding. Correspondence to 1 of the 28 Healthy People 2010 focus areas determined whether domestic editorials were about health. An ethnographic content analysis. There were 1075 editorials from the Los Angeles Times and 361 from La Opinión; 17% were focused on domestic health issues. Three Healthy People 2010 focus areas dominated: Environmental Health, Injury and Violence Prevention, and Access to Quality Health Services. Ten focus areas did not receive a single mention in the Los Angeles Times, and 19 focus areas lacked editorials in La Opinión. Editorial writers regularly tackled issues related to a Healthy People 2010 focus area. Public health practitioners can meet with their local newspaper editorial board and discuss the nation's health objectives as manifested by Healthy People 2020 and the National Prevention Strategy, thereby promoting policies that support individual and population health.

Editorial Comments, 1974-1986: The Case For and Against the Use of Computer-Assisted Decision Making

PubMed Central

Weaver, Robert R.

1987-01-01

Journal editorials are an important medium for communicating information about medical innovations. Evaluative statements contained in editorials pertain to the innovation's technical merits, as well as its probable economic, social and political, and ethical consequences. This information will either promote or impede the subsequent diffusion of innovations. This paper analyzes the evaluative information contained in thirty editorials that pertain to the topic of computer-assisted decision making (CDM). Most editorials agree that CDM technology is effective and economical in performing routine clinical tasks; controversy surrounds the use of more sophisticated CDM systems for complex problem solving. A few editorials argue that the innovation should play an integral role in transforming the established health care system. Most, however, maintain that it can or should be accommodated within the existing health care framework. Finally, while few editorials discuss the ethical ramifications of CDM technology, those that do suggest that it will contribute to more humane health care. The editorial analysis suggests that CDM technology aimed at routine clinical task will experience rapid diffusion. In contrast, the diffusion of more sophisticated CDM systems will, in the foreseeable future, likely be sporadic at best.

A Room with a Viewpoint Revisited: Descriptive Norms and Hotel Guests' Towel Reuse Behavior

PubMed Central

Bohner, Gerd; Schlüter, Lena E.

2014-01-01

Field experiments on descriptive norms as a means to increase hotel guests' towel reuse [1] were replicated and extended. In two hotels in Germany (Study 1: N = 724; Study 2: N = 204), descriptive norm messages suggesting that 75% of guests had reused their towels, or a standard message appealing to environmental concerns, were placed in guests' bathrooms. Descriptive norm messages varied in terms of proximity of the reference group (“hotel guests” vs. “guests in this room”) and temporal proximity (currently vs. two years previous). Reuse of towels was unobtrusively recorded. Results showed that reuse rates were high overall and that both standard and descriptive norm messages increased reuse rates compared to a no-message baseline. However, descriptive norm messages were not more effective than the standard message, and effects of proximity were inconsistent across studies. Discussion addresses cultural and conceptual issues in comparing the present findings with previous ones. PMID:25084348

Microimaging of transient guest profiles to monitor mass transfer in nanoporous materials

NASA Astrophysics Data System (ADS)

Kärger, Jörg; Binder, Tomas; Chmelik, Christian; Hibbe, Florian; Krautscheid, Harald; Krishna, Rajamani; Weitkamp, Jens

2014-04-01

The intense interactions of guest molecules with the pore walls of nanoporous materials is the subject of continued fundamental research. Stimulated by their thermal energy, the guest molecules in these materials are subject to a continuous, irregular motion, referred to as diffusion. Diffusion, which is omnipresent in nature, influences the efficacy of nanoporous materials in reaction and separation processes. The recently introduced techniques of microimaging by interference and infrared microscopy provide us with a wealth of information on diffusion, hitherto inaccessible from commonly used techniques. Examples include the determination of surface barriers and the sticking coefficient's analogue, namely the probability that, on colliding with the particle surface, a molecule may continue its diffusion path into the interior. Microimaging is further seen to open new vistas in multicomponent guest diffusion (including the detection of a reversal in the preferred diffusion pathways), in guest-induced phase transitions in nanoporous materials and in matching the results of diffusion studies under equilibrium and non-equilibrium conditions.

An organic dye-polymer (phenol red-poly (vinyl alcohol)) composite architecture towards tunable -optical and -saturable absorption characteristics

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sreedhar, Sreeja, E-mail: sreejasreedhar83@gmail.com; Muneera, C. I., E-mail: drcimuneera@hotmail.com; Illyaskutty, Navas

2016-05-21

Herein, we demonstrate that blending an organic dye (guest/filler), with a vinyl polymer (host template), is an inexpensive and simple approach for the fabrication of multifunctional photonic materials which could display an enhancement in the desirable properties of the constituent materials and, at the same time provide novel synergistic properties for the guest-host system. A new guest-host nanocomposite system comprising Phenol Red dye and poly (vinyl alcohol) as guest and host template, respectively, which exhibits tunable optical characteristics and saturable absorption behavior, is introduced. The dependence of local electronic environment provided by the polymer template and the interactions of themore » polymer molecules with the encapsulated guest molecules on the observed optical/nonlinear absorption behavior is discussed. An understanding of the tunability of the optical/ photophysical processes, with respect to the filler content, as discussed herein could help in the design of improved optical materials for several photonic device applications like organic light emitting diodes and saturable absorbers.« less

Accessibility to editorial information in Oral and Maxillofacial Surgery journals: The authors' point of view.

PubMed

Castelo-Baz, Pablo; Leira-Feijoo, Yago; Seoane-Romero, Juan Manuel; Varela-Centelles, Pablo; Seoane, Juan

2015-09-01

To evaluate the accessibility to editorial information in Oral & Maxillofacial Surgery journals. A cross-sectional study using the WOS-Web of Science database in three categories: "Surgery," "Otorhinolaryngology," and "Dentistry, Oral Surgery & Medicine" was designed. Journals were filtered by title and classified under three headings: OMFS specialty; OMFS subspecialty and related sciences; and multidisciplinary journals. Specialty scope (OMFS vs. other); impact factor; path for the manuscript; blinding policy; accessibility to reviewers' criteria; and percentage of acceptance. Only 46 of 330 journals met the inclusion criteria. All OMFS journals provided comprehensive information about the review process, compared to 5 of 27 (18.5%) of Oral Surgery and related sciences periodicals. Most specialty journals do not inform about the blind review mode used (20 of 33; 60.6%). Generally, information about the reviewers' assessment criteria is scarce, but is available from all OMFS journals, which also state the percentage of manuscript acceptance (100% vs. 14.8%). OMFS JCR journals provide adequate information about their editorial process in terms of path for the manuscript, accessibility to reviewers' criteria, and percentage of acceptance. Additional efforts are needed to increase accessibility to information about blinding policy and average time from submission to acceptance. Copyright © 2015 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

Identification of Guest-Host Inclusion Complexes in the Gas Phase by Electrospray Ionization-Mass Spectrometry

ERIC Educational Resources Information Center

Mendes, De´bora C.; Ramamurthy, Vaidhyanathan; Da Silva, Jose´ P.

2015-01-01

In this laboratory experiment, students follow a step-by-step procedure to prepare and study guest-host complexes in the gas phase using electrospray ionization-mass spectrometry (ESI-MS). Model systems are the complexes of hosts cucurbit[7]uril (CB7) and cucurbit[8]uril (CB8) with the guest 4-styrylpyridine (SP). Aqueous solutions of CB7 or CB8…

COFS 1 Guest Investigator Program

NASA Technical Reports Server (NTRS)

Fontana, Anthony; Wright, Robert L.

1986-01-01

The process for selecting guest investigators for participation in the Control of Flexible Structures (COFS)-1 program is described. Contracts and grants will be awarded in late CY87. A straw-man list of types of experiments and a distribution of the experiments has been defined to initiate definition of an experiments package which supports development and validation of control structures interaction technology. A schedule of guest investigator participation has been developed.

Making Math Real: Effective Qualities of Guest Speaker Presentations and the Impact of Speakers on Student Attitude and Achievement in the Algebra Classroom

ERIC Educational Resources Information Center

McKain, Danielle R.

2012-01-01

The term real world is often used in mathematics education, yet the definition of real-world problems and how to incorporate them in the classroom remains ambiguous. One way real-world connections can be made is through guest speakers. Guest speakers can offer different perspectives and share knowledge about various subject areas, yet the impact…

Host-guest chemistry of dendrimer-drug complexes: 7. Formation of stable inclusions between acetylated dendrimers and drugs bearing multiple charges.

PubMed

Fang, Min; Zhang, Jiahai; Wu, Qinglin; Xu, Tongwen; Cheng, Yiyun

2012-03-15

Drug molecules bearing multiple charges usually form precipitates with cationic dendrimers, which presents a challenge during the preparation of dendrimer inclusions for these drugs. In the present study, fully acetylated polyamidoamine (PAMAM) dendrimers were proposed as stable vehicles for drug molecules bearing two negative charges such as Congo red and indocyanine green. NMR techniques including (1)H NMR and (1)H-(1)H NOESY were used to characterize the host-guest chemistry of acetylated dendrimer and these guest molecules. The cationic PAMAM dendrimer was found to form a precipitate with Congo red and indocyanine green, but the acetylated one avoided the formation of cross-linking structures in aqueous solutions. NOESY studies revealed the encapsulation of Congo red and indocyanine green within the interior cavities of PAMAM dendrimers at mild acidic conditions and acetylated dendrimers show much stronger ability to encapsulate the guest molecules than cationic ones. Also, UV-vis-NIR studies suggest that acetylated dendrimers significantly improve the photostability of indocyanine green and prevent the formation of indocyanine green J-aggregates in aqueous solutions. The present study provides a new insight into dendrimer-based host-guest systems, especially for those guest molecules bearing multiple charges. © 2012 American Chemical Society

Multiscale and Multifunctional Emulsions by Host–Guest Interaction-Mediated Self-Assembly

PubMed Central

2018-01-01

Emulsions are widely used in numerous fields. Therefore, there has been increasing interest in the development of new emulsification strategies toward emulsions with advanced functions. Herein we report the formation of diverse emulsions by host–guest interaction-mediated interfacial self-assembly under mild conditions. In this strategy, a hydrophilic diblock copolymer with one block containing β-cyclodextrin (β-CD) can assemble at the oil/water interface when its aqueous solution is mixed with an oil phase of benzyl alcohol (BA), by host–guest interactions between β-CD and BA. This results in significantly reduced interfacial tension and the formation of switchable emulsions with easily tunable droplet sizes. Furthermore, nanoemulsions with excellent stability are successfully prepared simply via vortexing. The self-assembled oil-in-water emulsions also show catastrophic phase inversion, which can generate stable bicontinuous phase and water-in-oil emulsions, thereby further extending phase structures that can be realized by this host–guest self-assembly approach. Moreover, the host–guest nanoemulsions are able to engineer different nanoparticles and microstructures as well as solubilize a diverse array of hydrophobic drugs and dramatically enhance their oral bioavailability. The host–guest self-assembly emulsification is facile, energetically friendly, and fully translatable to industry, therefore representing a conceptually creative approach toward advanced emulsions. PMID:29806006

No evidence of transmission from an acute case of hepatitis A in a foodhandler: follow-up of almost 1,000 potentially exposed individuals, London, United Kingdom, April 2012.

PubMed

Hall, V; Abrahams, A; Turbitt, D; Cathcart, S; Maguire, H; Balasegaram, S

2014-07-31

Identification of acute hepatitis A virus (HAV) infection in a foodhandler in a London hotel led to a large incident response. We identified three potentially exposed groups: hotel staff who had regularly consumed food prepared by the case and shared toilet facilities with the case, patients who shared the same hospital ward as the case and hotel guests who consumed food prepared by the case. We arranged post-exposure HAV vaccination for all 83 potentially exposed hotel staff and all 17 patients. We emailed 887 guests advising them to seek medical care if symptomatic, but did not advise vaccination as it was too late to be effective for most guests. Through the International Health Regulations national focal points and the European Union Early warning and response system (EWRS), we communicated the details of the incident to public health agencies and potential risk of HAV transmission to international guests. Potentially exposed hotel staff and guests were asked to complete an online or telephone-administered questionnaire 50 days following possible exposure, to identify any secondary cases. Survey response was low, with 155 responses from guests and 33 from hotel staff. We identified no secondary cases of HAV infection through follow-up.

Effects of guest feeding programs on captive giraffe behavior.

PubMed

Orban, David A; Siegford, Janice M; Snider, Richard J

2016-01-01

Zoological institutions develop human-animal interaction opportunities for visitors to advance missions of conservation, education, and recreation; however, the animal welfare implications largely have yet to be evaluated. This behavioral study was the first to quantify impacts of guest feeding programs on captive giraffe behavior and welfare, by documenting giraffe time budgets that included both normal and stereotypic behaviors. Thirty giraffes from nine zoos (six zoos with varying guest feeding programs and three without) were observed using both instantaneous scan sampling and continuous behavioral sampling techniques. All data were collected during summer 2012 and analyzed using linear mixed models. The degree of individual giraffe participation in guest feeding programs was positively associated with increased time spent idle and marginally associated with reduced time spent ruminating. Time spent participating in guest feeding programs had no effect on performance of stereotypic behaviors. When time spent eating routine diets was combined with time spent participating in guest feeding programs, individuals that spent more time engaged in total feeding behaviors tended to perform less oral stereotypic behavior such as object-licking and tongue-rolling. By extending foraging time and complexity, guest feeding programs have the potential to act as environmental enrichment and alleviate unfulfilled foraging motivations that may underlie oral stereotypic behaviors observed in many captive giraffes. However, management strategies may need to be adjusted to mitigate idleness and other program consequences. Further studies, especially pre-and-post-program implementation comparisons, are needed to better understand the influence of human-animal interactions on zoo animal behavior and welfare. © 2016 Wiley Periodicals, Inc.

Molecular structures of the inclusion complexes beta-cyclodextrin-1,2-bis(4-aminophenyl)ethane and beta-cyclodextrin-4,4'-diaminobiphenyl; packing of dimeric beta-cyclodextrin inclusion complexes.

PubMed

Giastas, Petros; Yannakopoulou, Konstantina; Mavridis, Irene M

2003-04-01

The present investigation is part of an ongoing study on the influence of the long end-functonalized guest molecules DBA and BNZ in the crystal packing of beta-cyclodextrin (betaCD) dimeric complexes. The title compounds are 2:2 host:guest complexes showing limited host-guest hydrogen bonding at the primary faces of the betaCD dimers. Within the betaCD cavity the guests exhibit mutual pi...pi interactions and between betaCD dimers perpendicular NH...pi interactions. The DBA guest molecule exhibits one extended and two bent conformations in the complex. The BNZ guest molecule is not planar inside betaCD, in contrast to the structure of BNZ itself, which indicates that the cavity isolates the molecules and forbids the pi...pi stacking of the aromatic rings. NMR spectroscopy studies show that in aqueous solution both DBA and BNZ form strong complexes that have 1:1 stoichiometry and structures similar to the solid state ones. The relative packing of the dimers is the same in both complexes. The axes of two adjacent dimers form an angle close to 20 degrees and have a lateral displacement approximately 2.45 A, both of which characterize the screw-channel mode of packing. Although the betaCD/BNZ complex indeed crystallizes in a space group characterizing the latter mode, the betaCD/DBA complex crystallizes in a space group with novel dimensions not resembling any of the packing modes reported so far. The new lattice is attributed to the three conformations exhibited by the guest in the crystals. However, this lattice can be transformed into another, which is isostructural to that of the betaCD/BNZ inclusion complex, if the conformation of the guest is not taken into account.

A structural model of polyglutamine determined from a host-guest method combining experiments and landscape theory.

PubMed

Finke, John M; Cheung, Margaret S; Onuchic, José N

2004-09-01

Modeling the structure of natively disordered peptides has proved difficult due to the lack of structural information on these peptides. In this work, we use a novel application of the host-guest method, combining folding theory with experiments, to model the structure of natively disordered polyglutamine peptides. Initially, a minimalist molecular model (C(alpha)C(beta)) of CI2 is developed with a structurally based potential and captures many of the folding properties of CI2 determined from experiments. Next, polyglutamine "guest" inserts of increasing length are introduced into the CI2 "host" model and the polyglutamine is modeled to match the resultant change in CI2 thermodynamic stability between simulations and experiments. The polyglutamine model that best mimics the experimental changes in CI2 thermodynamic stability has 1), a beta-strand dihedral preference and 2), an attractive energy between polyglutamine atoms 0.75-times the attractive energy between the CI2 host Go-contacts. When free-energy differences in the CI2 host-guest system are correctly modeled at varying lengths of polyglutamine guest inserts, the kinetic folding rates and structural perturbation of these CI2 insert mutants are also correctly captured in simulations without any additional parameter adjustment. In agreement with experiments, the residues showing structural perturbation are located in the immediate vicinity of the loop insert. The simulated polyglutamine loop insert predominantly adopts extended random coil conformations, a structural model consistent with low resolution experimental methods. The agreement between simulation and experimental CI2 folding rates, CI2 structural perturbation, and polyglutamine insert structure show that this host-guest method can select a physically realistic model for inserted polyglutamine. If other amyloid peptides can be inserted into stable protein hosts and the stabilities of these host-guest mutants determined, this novel host-guest method may prove useful to determine structural preferences of these intractable but biologically relevant protein fragments.

Supramolecular chemistry at interfaces: host-guest interactions for fabricating multifunctional biointerfaces.

PubMed

Yang, Hui; Yuan, Bin; Zhang, Xi; Scherman, Oren A

2014-07-15

CONSPECTUS: Host-guest chemistry can greatly improve the selectivity of biomolecule-ligand binding on account of recognition-directed interactions. In addition, functional structures and the actuation of supramolecular assemblies in molecular systems can be controlled efficiently through various host-guest chemistry. Together, these highly selective, strong yet dynamic interactions can be exploited as an alternative methodology for applications in the field of programmable and controllable engineering of supramolecular soft materials through the reversible binding between complementary components. Many processes in living systems such as biotransformation, transportation of matter, and energy transduction begin with interfacial molecular recognition, which is greatly influenced by various external stimuli at biointerfaces. Detailed investigations about the molecular recognition at interfaces can result in a better understanding of life science, and further guide us in developing new biomaterials and medicines. In order to mimic complicated molecular-recognition systems observed in nature that adapt to changes in their environment, combining host-guest chemistry and surface science is critical for fabricating the next generation of multifunctional biointerfaces with efficient stimuli-responsiveness and good biocompatibility. In this Account, we will summarize some recent progress on multifunctional stimuli-responsive biointerfaces and biosurfaces fabricated by cyclodextrin- or cucurbituril-based host-guest chemistry and highlight their potential applications including drug delivery, bioelectrocatalysis, and reversible adsorption and resistance of peptides, proteins, and cells. In addition, these biointerfaces and biosurfaces demonstrate efficient response toward various external stimuli, such as UV light, pH, redox chemistry, and competitive guests. All of these external stimuli can aid in mimicking the biological stimuli evident in complex biological environments. We begin by reviewing the current state of stimuli-responsive supramolecular assemblies formed by host-guest interactions, discussing how to transfer host-guest chemistry from solution onto surfaces required for fabricating multifunctional biosurfaces and biointerfaces. Then, we present different stimuli-responsive biosurfaces and biointerfaces, which have been prepared through a combination of cyclodextrin- or cucurbituril-based host-guest chemistry and various surface technologies such as self-assembled monolayers or layer-by-layer assembly. Moreover, we discuss the applications of these biointerfaces and biosurfaces in the fields of drug release, reversible adsorption and release of some organic molecules, peptides, proteins, and cells, and photoswitchable bioelectrocatalysis. In addition, we summarize the merits and current limitations of these methods for fabricating multifunctional stimuli-responsive biointerfaces in a dynamic noncovalent manner. Finally, we present possible strategies for future designs of stimuli-responsive multifunctional biointerfaces and biosurfaces by combining host-guest chemistry with surface science, which will lead to further critical development of supramolecular chemistry at interfaces.

Rotaxane and catenane host structures for sensing charged guest species.

PubMed

Langton, Matthew J; Beer, Paul D

2014-07-15

CONSPECTUS: The promise of mechanically interlocked architectures, such as rotaxanes and catenanes, as prototypical molecular switches and shuttles for nanotechnological applications, has stimulated an ever increasing interest in their synthesis and function. The elaborate host cavities of interlocked structures, however, can also offer a novel approach toward molecular recognition: this Account describes the use of rotaxane and catenane host systems for binding charged guest species, and for providing sensing capability through an integrated optical or electrochemical reporter group. Particular attention is drawn to the exploitation of the unusual dynamic properties of interlocked molecules, such as guest-induced shuttling or conformational switching, as a sophisticated means of achieving a selective and functional sensor response. We initially survey interlocked host systems capable of sensing cationic guests, before focusing on our accomplishments in synthesizing rotaxanes and catenanes designed for the more challenging task of selective anion sensing. In our group, we have developed the use of discrete anionic templation to prepare mechanically interlocked structures for anion recognition applications. Removal of the anion template reveals an interlocked host system, possessing a unique three-dimensional geometrically restrained binding cavity formed between the interlocked components, which exhibits impressive selectivity toward complementary anionic guest species. By incorporating reporter groups within such systems, we have developed both electrochemical and optical anion sensors which can achieve highly selective sensing of anionic guests. Transition metals, lanthanides, and organic fluorophores integrated within the mechanically bonded structural framework of the receptor are perturbed by the binding of the guest, with a concomitant change in the emission profile. We have also exploited the unique dynamics of interlocked hosts by demonstrating that an anion-induced conformational change can be used as a means of signal transduction. Electrochemical sensing has been realized by integration of the redox-active ferrocene functionality within a range of rotaxane and catenanes; binding of an anion perturbs the metallocene, leading to a cathodic shift in the ferrocene/ferrocenium redox couple. In order to obtain practical sensors for target charged guest species, confinement of receptors at a surface is necessary in order to develop robust, reuseable devices. Surface confinement also offers advantages over solution based receptors, including amplification of signal, enhanced guest binding thermodynamics and the negation of solubility problems. We have fabricated anion-templated rotaxanes and catenanes on gold electrode surfaces and demonstrated that the resulting mechanically bonded self-assembled monolayers are electrochemically responsive to the binding of anions, a crucial first step toward the advancement of sophisticated, highly selective, anion sensory devices. Rotaxane and catenane host molecules may be engineered to offer a superior level of molecular recognition, and the incorporation of optical or electrochemical reporter groups within these interlocked frameworks can allow for guest sensing. Advances in synthetic templation strategies has facilitated the synthesis of interlocked architectures and widened their interest as prototype molecular machines. However, their unique host-guest properties are only now beginning to be exploited as a sophisticated approach to chemical sensing. The development of functional host-guest sensory systems such as these is of great interest to the interdisciplinary field of supramolecular chemistry.

Preparation and characterization of multi stimuli-responsive photoluminescent nanocomposites of graphene quantum dots with hyperbranched polyethylenimine derivatives

NASA Astrophysics Data System (ADS)

Liu, Xing; Liu, Hua-Ji; Cheng, Fa; Chen, Yu

2014-06-01

Oxidized graphene sheets (OGS) were treated with a hyperbranched polyethylenimine (PEI) under hydrothermal conditions to generate nanocomposites of graphene quantum dots (GQDs) functionalized with PEI (GQD-PEIs). The influence of the reaction temperature and the PEI/OGS feed ratio on the photoluminescence properties of the GQD-PEIs was studied. The obtained GQD-PEIs were characterized by TEM, dynamic light scattering, elemental analysis, FTIR, zeta potential measurements and 1H NMR spectroscopy, from which their structural information was inferred. Subsequently, isobutyric amide (IBAm) groups were attached to the GQD-PEIs through the amidation reaction of isobutyric anhydride with the PEI moieties, which resulted in GQD-PEI-IBAm nanocomposites. GQD-PEI-IBAm was not only thermoresponsive, but also responded to other stimuli, including inorganic salts, pH, and loaded organic guests. The cloud point temperature (Tcp) of aqueous solutions of GQD-PEI-IBAm could be modulated through changing the number of IBAm units in GQD-PEI-IBAm, by varying the type and concentration of the inorganic salts and loaded organic guests, or by varying the pH. All the obtained GQD-PEI-IBAm nanocomposites were photoluminescent, and their maximum emission wavelengths were not influenced by outside stimuli. Their emission intensities were influenced a little or negligibly by pH, traditional salting-out anions (Cl- and SO42-), and the relatively polar aspirin guest. However, the traditional salting-in I- anion and the more hydrophobic 1-pyrenebutyric acid (PBA) guest could effectively quench their fluorescence. 2D NOESY 1H NMR spectra verified that GQD-PEI-IBAm accommodated the relatively polar aspirin guest using the PEI-IBAm shell, but adsorbed the relatively hydrophobic PBA guest through the nanographene core. The release rate of the guest encapsulated by the thermoresponsive GQD is different below and above Tcp.Oxidized graphene sheets (OGS) were treated with a hyperbranched polyethylenimine (PEI) under hydrothermal conditions to generate nanocomposites of graphene quantum dots (GQDs) functionalized with PEI (GQD-PEIs). The influence of the reaction temperature and the PEI/OGS feed ratio on the photoluminescence properties of the GQD-PEIs was studied. The obtained GQD-PEIs were characterized by TEM, dynamic light scattering, elemental analysis, FTIR, zeta potential measurements and 1H NMR spectroscopy, from which their structural information was inferred. Subsequently, isobutyric amide (IBAm) groups were attached to the GQD-PEIs through the amidation reaction of isobutyric anhydride with the PEI moieties, which resulted in GQD-PEI-IBAm nanocomposites. GQD-PEI-IBAm was not only thermoresponsive, but also responded to other stimuli, including inorganic salts, pH, and loaded organic guests. The cloud point temperature (Tcp) of aqueous solutions of GQD-PEI-IBAm could be modulated through changing the number of IBAm units in GQD-PEI-IBAm, by varying the type and concentration of the inorganic salts and loaded organic guests, or by varying the pH. All the obtained GQD-PEI-IBAm nanocomposites were photoluminescent, and their maximum emission wavelengths were not influenced by outside stimuli. Their emission intensities were influenced a little or negligibly by pH, traditional salting-out anions (Cl- and SO42-), and the relatively polar aspirin guest. However, the traditional salting-in I- anion and the more hydrophobic 1-pyrenebutyric acid (PBA) guest could effectively quench their fluorescence. 2D NOESY 1H NMR spectra verified that GQD-PEI-IBAm accommodated the relatively polar aspirin guest using the PEI-IBAm shell, but adsorbed the relatively hydrophobic PBA guest through the nanographene core. The release rate of the guest encapsulated by the thermoresponsive GQD is different below and above Tcp. Electronic supplementary information (ESI) available: Elemental analysis data; typical FTIR spectra; typical photographs of the GQD solution before and after phase transition; typical luminescence photographs, and typical photoluminescence spectra. See DOI: 10.1039/c4nr00739e

CALL FOR PAPERS: Special issue on the random search problem: trends and perspectives

NASA Astrophysics Data System (ADS)

da Luz, Marcos G. E.; Grosberg, Alexander Y.; Raposo, Ernesto P.; Viswanathan, Gandhi M.

2008-11-01

This is a call for contributions to a special issue of Journal of Physics A: Mathematical and Theoretical dedicated to the subject of the random search problem. The motivation behind this special issue is to summarize in a single comprehensive publication, the main aspects (past and present), latest developments, different viewpoints and the directions being followed in this multidisciplinary field. We hope that such a special issue could become a particularly valuable reference for the broad scientific community working with the general random search problem. The Editorial Board has invited Marcos G E da Luz, Alexander Y Grosberg, Ernesto P Raposo and Gandhi M Viswanathan to serve as Guest Editors for the special issue. The general question of how to optimize the search for specific target objects in either continuous or discrete environments when the information available is limited is of significant importance in a broad range of fields. Representative examples include ecology (animal foraging, dispersion of populations), geology (oil recovery from mature reservoirs), information theory (automated researchers of registers in high-capacity database), molecular biology (proteins searching for their sites, e.g., on DNA ), etc. One reason underlying the richness of the random search problem relates to the `ignorance' of the locations of the randomly located `targets'. A statistical approach to the search problem can deal adequately with incomplete information and so stochastic strategies become advantageous. The general problem of how to search efficiently for randomly located target sites can thus be quantitatively described using the concepts and methods of statistical physics and stochastic processes. Scope Thus far, to the best of our knowledge, no recent textbook or review article in a physics journal has appeared on this topic. This makes a special issue with review and research articles attractive to those interested in acquiring a general introduction to the field. The subject can be approached from the perspective of different fields: ecology, networks, transport problems, molecular biology, etc. The study of the problem is particularly suited to the concepts and methods of statistical physics and stochastic processes; for example, fractals, random walks, anomalous diffusion. Discrete landscapes can be approached via graph theory, random lattices and complex networks. Such topics are regularly discussed in Journal of Physics A: Mathematical and Theoretical. All such aspects of the problem fall within the scope and focus of this special issue on the random search problem: trends and perspectives. Editorial policy All contributions to the special issue will be refereed in accordance with the refereeing policy of the journal. In particular, all research papers will be expected to be original work reporting substantial new results. The issue will also contain a number of review articles by invitation only. The Guest Editors reserve the right to judge whether a contribution fits the scope of the special issue. Guidelines for preparation of contributions We aim to publish the special issue in August 2009. To realize this, the DEADLINE for contributed papers is 15 January 2009. There is a page limit of 15 printed pages (approximately 9000 words) per contribution. For papers exceeding this limit, the Guest Editors reserve the right to request a reduction in length. Further advice on document preparation can be found at www.iop.org/Journals/jphysa. Contributions to the special issue should if possible be submitted electronically by web upload at www.iop.org/Journals/jphysa, or by email to jphysa@iop.org, quoting 'J. Phys. A Special Issue— Random Search Problem'. Please state whether the paper has been invited or is contributed. Submissions should ideally be in standard LaTeX form. Please see the website for further information on electronic submissions. Authors unable to submit electronically may send hard-copy contributions to: Publishing Administrators, Journal of Physics A, Institute of Physics Publishing, Dirac House, Temple Back, Bristol BS1 6BE, UK, enclosing electronic code on CD if available and quoting 'J. Phys. A Special Issue—Random Search Problem'. All contributions should be accompanied by a read-me file or covering letter giving the postal and e-mail addresses for correspondence. The Publishing Office should be notified of any subsequent change of address. This special issue will be published in the paper and online version of the journal. The corresponding author of each contribution will receive a complimentary copy of the issue.

A Multi-Year Study of Tobacco Control in Newspaper Editorials Using Community Characteristic Data and Content Analysis Findings.

PubMed

Stanfield, Kellie; Rodgers, Shelly

2018-07-01

We content analyzed 1,473 newspaper editorials for topic, tone, and slant, and connected the results to community characteristic data: clean indoor air ordinance status for cities, and official smoking rates for counties. The analysis occurred during a multi-year project aimed at prompting communities to adopt clean indoor air policies. The results showed that most editorials were about tobacco restrictions or ordinances, were neutral in tone, and provided factual information about tobacco control. More editorials were negatively slanted vs. positively slanted toward tobacco control. Most editorials with positive tones were published in newspapers in towns that already had clean indoor air policies. We concluded that editorials might hold increased weight in spurring change, as the percentage of smokers in a city is unrelated to the town enacting a clean indoor air ordinance.

Host-Guest Interaction of Cucurbit[8]uril with N-(3-Aminopropyl)cyclohexylamine: Cyclohexyl Encapsulation Triggered Ternary Complex.

PubMed

Xia, Yu; Wang, Chuan-Zeng; Tian, Mengkui; Tao, Zhu; Ni, Xin-Long; Prior, Timothy J; Redshaw, Carl

2018-01-15

The host-guest interaction of a series of cyclohexyl-appended guests with cucurbit[8]uril (Q[8]) was studied by ¹H NMR spectroscopy, isothermal titration calorimetry (ITC), and X-ray crystallography. The X-ray structure revealed that two cycloalkane moieties can be simultaneously encapsulated in the hydrophobic cavity of the Q[8] host to form a ternary complex for the first time.

Diffusion of vaporous guests into a seemingly non-porous organic crystal

DOE Office of Scientific and Technical Information (OSTI.GOV)

Herbert, Simon A.; Janiak, Agnieszka; Thallapally, Praveen K.

2014-10-07

In this research, the tetragonal apohost phase of p-tert-butyltetramethoxythiacalix[4]arene absorbs hydrochloric acid and iodine. These guest molecules occupy different sites in the solid-state structure -- either within the small intrinsic voids of the macrocycle or within the interstitial spaces between the host molecules. This study illustrates the dynamic deformation of the host, providing strong mechanistic insight into the diffusion of guests into this seemingly non-porous material.

Host-guest capability of a three-dimensional heterometallic macrocycle.

PubMed

Fan, Qi-Jia; Lin, Yue-Jian; Hahn, F Ekkehardt; Jin, Guo-Xin

2018-02-13

A three-dimensional heterometallic coordination macrocycle is found to be capable of encapsulating planar pyrene (G1), coronene (G4) and non-planar corannulene (G2) guest molecules in high yields, giving rise to 1 : 1 host-guest complexes. The bowl-shaped guest corannulene is found to be significantly flattened upon inclusion within the cavity. However, macrocyclic compounds with larger cavity sizes, which form 1 : 1 stoichiometry assemblies with a naphthalene bisimide planar molecule (G3), are more inclined to form infinite sandwich structures. Furthermore, these heterometallic coordination macrocycles can be destroyed in the presence of a soft base to form hexanuclear triangular prism complexes. These structures are unambiguously revealed by single-crystal X-ray analysis.

Academic Primer Series: Key Papers About Teaching with Technology.

PubMed

Boysen-Osborn, Megan; Cooney, Robert; Gottlieb, Michael; Chan, Teresa M; Brown, Aaron; King, Andrew; Tobias, Adam; Thoma, Brent

2017-06-01

Modern learners have immediate, unlimited access to a wide variety of online resources . To appeal to this current generation of learners, educators must embrace the use of technology. However, educators must balance newer, novel technologies with traditional methods to achieve the best learning outcomes. Therefore, we aimed to review several papers useful for faculty members wishing to incorporate technology into instructional design. We identified a broad list of papers relevant to teaching and learning with technology within the online discussions of the Academic Life in Emergency Medicine (ALiEM) Faculty Incubator. This list was augmented with suggestions by a guest expert (BT) and an open call on Twitter (tagged with the #meded and #FOAMed hashtags) yielding 24 papers. We then conducted a modified three-round Delphi process within the authorship group, including junior and senior faculty members, to identify the most impactful papers. We pared the list of 24 papers to five that were most highly rated. Two were research papers and three were commentaries or editorials. The authorship group reviewed and summarized these papers with specific consideration to their value to junior educators and faculty developers. This is a key reading list for junior faculty members and faculty developers interested in teaching with technology. The commentary contextualizes the importance of these papers for medical educators, to optimize use of technology in their teaching or incorporate into faculty development.

Academic Primer Series: Key Papers About Teaching with Technology

PubMed Central

Boysen-Osborn, Megan; Cooney, Robert; Gottlieb, Michael; Chan, Teresa M.; Brown, Aaron; King, Andrew; Tobias, Adam; Thoma, Brent

2017-01-01

Introduction Modern learners have immediate, unlimited access to a wide variety of online resources. To appeal to this current generation of learners, educators must embrace the use of technology. However, educators must balance newer, novel technologies with traditional methods to achieve the best learning outcomes. Therefore, we aimed to review several papers useful for faculty members wishing to incorporate technology into instructional design. Methods We identified a broad list of papers relevant to teaching and learning with technology within the online discussions of the Academic Life in Emergency Medicine (ALiEM) Faculty Incubator. This list was augmented with suggestions by a guest expert (BT) and an open call on Twitter (tagged with the #meded and #FOAMed hashtags) yielding 24 papers. We then conducted a modified three-round Delphi process within the authorship group, including junior and senior faculty members, to identify the most impactful papers. Results We pared the list of 24 papers to five that were most highly rated. Two were research papers and three were commentaries or editorials. The authorship group reviewed and summarized these papers with specific consideration to their value to junior educators and faculty developers. Conclusion This is a key reading list for junior faculty members and faculty developers interested in teaching with technology. The commentary contextualizes the importance of these papers for medical educators, to optimize use of technology in their teaching or incorporate into faculty development. PMID:28611895

Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (84th, Washington, DC, August 5-8, 2001). Newspaper Division.

ERIC Educational Resources Information Center

Association for Education in Journalism and Mass Communication.

The Newspaper section, Part 1 of the proceedings contains the following selected papers: "Gatekeeping and the Editorial Cartoon: A Case Study of the 2000 Presidential Campaign Cartoons" (Jennifer M. Proffitt); "Campaign Contributions: Online Newspapers Go Beyond Shovelware in Covering Election 2000" (Jane B. Singer); "At…

32 CFR Appendix B to Part 247 - CE Publications

Code of Federal Regulations, 2013 CFR

2013-07-01

... in addition to that required in § 247.4 (i) and (j). “The editorial content of this publication is... avoid conflicts of interest. 3 See footnote 1 to section G.3. of this appendix. J. Contracting for a CE... advertisers of the requirements in § 247.4(i) and § 247.4(j). d. A provision substantially as follows: “The...

Ten Years of Simulation in Healthcare: A Thematic Analysis of Editorials.

PubMed

Nestel, Debra

2017-10-01

In this commentary, I review 38 articles published as editorials in Simulation in Healthcare from inception to April 2016. Of the 27 authors, there was a predominance of medical doctors (63%), male authors (67%), and work originating in the United States (86%). The founding Editor-in-Chief Dr David Gaba contributed to half of the editorials. Using inductive thematic analysis, the following five themes were identified: "embedding" simulation, simulation responding to clinical practice, educational considerations for simulation, research practices, and communicating leadership and scholarship about the community. After thematic analysis, the theoretical notion of communities of practice was used to make further meaning of the themes. This theorizing process reveals that editorial content aligns with the features of an evolving community of practice. The editorials seem to have responded to and shaped contemporary simulation practices. The editorial is a powerful forum in which to frame issues relevant to the healthcare simulation community. As the founding Editor-in-Chief, Gaba has made an extraordinary contribution to the Society for Simulation in Healthcare, in these editorials and the broader healthcare simulation community. Under the leadership of the Editor-in-Chief, Dr Mark Scerbo, I am confident that the editorial voice will continue in the true spirit of scholarship.

A longitudinal social network analysis of the editorial boards of medical informatics and bioinformatics journals.

PubMed

Malin, Bradley; Carley, Kathleen

2007-01-01

The goal of this research is to learn how the editorial staffs of bioinformatics and medical informatics journals provide support for cross-community exposure. Models such as co-citation and co-author analysis measure the relationships between researchers; but they do not capture how environments that support knowledge transfer across communities are organized. In this paper, we propose a social network analysis model to study how editorial boards integrate researchers from disparate communities. We evaluate our model by building relational networks based on the editorial boards of approximately 40 journals that serve as research outlets in medical informatics and bioinformatics. We track the evolution of editorial relationships through a longitudinal investigation over the years 2000 through 2005. Our findings suggest that there are research journals that support the collocation of editorial board members from the bioinformatics and medical informatics communities. Network centrality metrics indicate that editorial board members are located in the intersection of the communities and that the number of individuals in the intersection is growing with time. Social network analysis methods provide insight into the relationships between the medical informatics and bioinformatics communities. The number of editorial board members facilitating the publication intersection of the communities has grown, but the intersection remains dependent on a small group of individuals and fragile.

3D nitrogen-doped graphene/β-cyclodextrin: host-guest interactions for electrochemical sensing

NASA Astrophysics Data System (ADS)

Liu, Jilun; Leng, Xuanye; Xiao, Yao; Hu, Chengguo; Fu, Lei

2015-07-01

Host-guest interactions, especially those between cyclodextrins (CDs, including α-, β- and γ-CD) and various guest molecules, exhibit a very high supramolecular recognition ability. Thus, they have received considerable attention in different fields. These specific interactions between host and guest molecules are promising for biosensing and clinical detection. However, there is a lack of an ideal electrode substrate for CDs to increase their performance in electrochemical sensing. Herein, we propose a new 3D nitrogen-doped graphene (3D-NG) based electrochemical sensor, taking advantage of the superior sensitivity of host-guest interactions. Our 3D-NG was fabricated by a template-directed chemical vapour deposition (CVD) method, and it showed a large specific surface area, a high capacity for biomolecules and a high electron transfer efficiency. Thus, for the first time, we took 3D-NG as an electrode substrate for β-CD to establish a new type of biosensor. Using dopamine (DA) and acetaminophen (APAP) as representative guest molecules, our 3D-NG/β-CD biosensor shows extremely high sensitivities (5468.6 μA mM-1 cm-2 and 2419.2 μA mM-1 cm-2, respectively), which are significantly higher than those reported in most previous studies. The stable adsorption of β-CD on 3D-NG indicates potential applications in clinical detection and medical testing.Host-guest interactions, especially those between cyclodextrins (CDs, including α-, β- and γ-CD) and various guest molecules, exhibit a very high supramolecular recognition ability. Thus, they have received considerable attention in different fields. These specific interactions between host and guest molecules are promising for biosensing and clinical detection. However, there is a lack of an ideal electrode substrate for CDs to increase their performance in electrochemical sensing. Herein, we propose a new 3D nitrogen-doped graphene (3D-NG) based electrochemical sensor, taking advantage of the superior sensitivity of host-guest interactions. Our 3D-NG was fabricated by a template-directed chemical vapour deposition (CVD) method, and it showed a large specific surface area, a high capacity for biomolecules and a high electron transfer efficiency. Thus, for the first time, we took 3D-NG as an electrode substrate for β-CD to establish a new type of biosensor. Using dopamine (DA) and acetaminophen (APAP) as representative guest molecules, our 3D-NG/β-CD biosensor shows extremely high sensitivities (5468.6 μA mM-1 cm-2 and 2419.2 μA mM-1 cm-2, respectively), which are significantly higher than those reported in most previous studies. The stable adsorption of β-CD on 3D-NG indicates potential applications in clinical detection and medical testing. Electronic supplementary information (ESI) available: The procedure for preparing the sensor, wide survey XPS, XRD patterns, the effect of scan rate, more CV data on the stability and selectivity, and a comparison with previous studies. See DOI: 10.1039/c5nr03109e

Combined analysis of 1,3-benzodioxoles by crystalline sponge X-ray crystallography and laser desorption ionization mass spectrometry.

PubMed

Hayashi, Yukako; Ohara, Kazuaki; Taki, Rika; Saeki, Tomomi; Yamaguchi, Kentaro

2018-03-12

The crystalline sponge (CS) method, which employs single-crystal X-ray diffraction to determine the structure of an analyte present as a liquid or an oil and having a low melting point, was used in combination with laser desorption ionization mass spectrometry (LDI-MS). 1,3-Benzodioxole derivatives were encapsulated in CS and their structures were determined by combining X-ray crystallography and MS. After the X-ray analysis, the CS was subjected to imaging mass spectrometry (IMS) with an LDI spiral-time-of-flight mass spectrometer (TOF-MS). The ion detection area matched the microscopic image of the encapsulated CS. In addition, the accumulated 1D mass spectra showed that fragmentation of the guest molecule (hereafter, guest) can be easily visualized without any interference from the fragment ions of CS except for two strong ion peaks derived from the tridentate ligand TPT (2,4,6-tris(4-pyridyl)-1,3,5-triazine) of the CS and its fragment. X-ray analysis clearly showed the presence of the guest as well as the π-π, CH-halogen, and CH-O interactions between the guest and the CS framework. However, some guests remained randomly diffused in the nanopores of CS. In addition, the detection limit was less than sub-pmol order based on the weight and density of CS determined by X-ray analysis. Spectroscopic data, such as UV-vis and NMR, also supported the encapsulation of the guest through the interaction between the guest and CS components. The results denote that the CS-LDI-MS method, which combines CS, X-ray analysis and LDI-MS, is effective for structure determination.

Switch-peptides: design and characterization of controllable super-amyloid-forming host-guest peptides as tools for identifying anti-amyloid agents.

PubMed

Camus, Marie-Stéphanie; Dos Santos, Sonia; Chandravarkar, Arunan; Mandal, Bhubaneswar; Schmid, Adrian W; Tuchscherer, Gabriele; Mutter, Manfred; Lashuel, Hilal A

2008-09-01

Several amyloid-forming proteins are characterized by the presence of hydrophobic and highly amyloidogenic core sequences that play critical roles in the initiation and progression of amyloid fibril formation. Therefore targeting these sequences represents a viable strategy for identifying candidate molecules that could interfere with amyloid formation and toxicity of the parent proteins. However, the highly amyloidogenic and insoluble nature of these sequences has hampered efforts to develop high-throughput fibrillization assays. Here we describe the design and characterization of host-guest switch peptides that can be used for in vitro mechanistic and screening studies that are aimed at discovering aggregation inhibitors that target highly amyloidogenic sequences. These model systems are based on a host-guest system where the amyloidogenic sequence (guest peptide) is flanked by two beta-sheet-promoting (Leu-Ser)(n) oligomers as host sequences. Two host-guest peptides were prepared by using the hydrophobic core of Abeta comprising residues 14-24 (HQKLVFFAEDV) as the guest peptide with switch elements inserted within (peptide 1) or at the N and C termini of the guest peptide (peptide 2). Both model peptides can be triggered to undergo rapid self-assembly and amyloid formation in a highly controllable manner and their fibrillization kinetics is tuneable by manipulating solution conditions (for example, peptide concentration and pH). The fibrillization of both peptides reproduces many features of the full-length Abeta peptides and can be inhibited by known inhibitors of Abeta fibril formation. Our results suggest that this approach can be extended to other amyloid proteins and should facilitate the discovery of small-molecule aggregation inhibitors and the development of more efficacious anti-amyloid agents to treat and/or reverse the pathogenesis of neurodegenerative and systemic amyloid diseases.

Increasing Sun Protection in Winter Outdoor Recreation

PubMed Central

Walkosz, Barbara J.; Buller, David B.; Andersen, Peter A.; Scott, Michael D.; Dignan, Mark B.; Cutter, Gary R.; Maloy, Julie A.

2009-01-01

Background Unprotected and excessive exposure to ultraviolet radiation (UVR) is the primary risk factor for skin cancer. Design A pair-matched, group-randomized, pre-test/post-test, quasi-experimental design, with ski resorts as the unit of randomization, tested the effectiveness of Go Sun Smart, a multi-channel skin cancer prevention program. Independent samples of guests were taken at baseline (2001) and follow-up (2002); data were analyzed in 2006. Setting and Participants A total of 6516 adult guests at 26 ski resorts in the western U.S. and Canada were recruited, consented, and interviewed on chairlifts. This study was nested within an occupational intervention for ski resort workers. Intervention Ski resorts were pair-matched and randomized to receive Go Sun Smart, which consisted of print, electronic, visual, and interpersonal skin cancer prevention messages. Main Outcome Measures Sun-protection behaviors, sunburning, recall of sun-protection messages, and the association of message exposure to sun protection. Results The difference in recall of all sun-protection messages, messages on signs and posters, and the Go Sun Smart logo was significant between the intervention and control resorts. Reported use of sun-protection practices was higher by guests at intervention ski areas using more (a higher dose of) Go Sun Smart materials. Intervention-group guests who recalled a sun-safety message were more likely to practice sun safety than intervention-group guests who did not recall a message and control-group guests. Conclusions While the mere implementation of Go Sun Smart did not produce sun-safety improvements, Go Sun Smart appeared to be effective for guests who encountered and remembered it. Many factors can work against message exposure. Signage seemed to produce the greatest increase in exposure to sun-safety messages. PMID:18471586

Learning from a dive show in an aquarium setting

NASA Astrophysics Data System (ADS)

Walsh, Lori M.

A study was conducted at an aquarium next to a theme park to understand information recalled from two versions of shows viewed at the largest display. The goal of this research was to determine if learning was enhanced by having a diver in water as the treatment group. This project focused on the knowledge recalled about shark and ray feeding adaptations, the information recalled about the mentioned conservation message about sustainable seafood and the potential of the two shows to make memorable experiences. During the project, 30 adult participants from each group were given a survey with five open-ended questions. Results suggest that the diver might distract from biological content information, or that the diver is such a novel element that it interferes with recall. While guests seemed to recall information about rays and sharks, the amount of information was not substantial. It appears that the diver does not affect content messaging but does impact whether guests attend to Seafood Watch messaging. The diver may have been so novel that the treatment group could not attend to the conservation message that was delivered, regardless of topic, or the control group recalled the message because the guests were not distracted by the diver or feeding. The absence of a diver seems to allow the guests to better attend to what is happening outside of the tank. While adding a diver increases photo opportunities and may bring guests to a show, the results seem to indicate that it does not significantly increase recall. The results of this study show that guests in a theme park setting can recall information from an educational program. Guests may not enter this hybrid aquarium with the intention of learning, but recall, one of the components in learning, does occur.

The SAMPL4 host-guest blind prediction challenge: an overview.

PubMed

Muddana, Hari S; Fenley, Andrew T; Mobley, David L; Gilson, Michael K

2014-04-01

Prospective validation of methods for computing binding affinities can help assess their predictive power and thus set reasonable expectations for their performance in drug design applications. Supramolecular host-guest systems are excellent model systems for testing such affinity prediction methods, because their small size and limited conformational flexibility, relative to proteins, allows higher throughput and better numerical convergence. The SAMPL4 prediction challenge therefore included a series of host-guest systems, based on two hosts, cucurbit[7]uril and octa-acid. Binding affinities in aqueous solution were measured experimentally for a total of 23 guest molecules. Participants submitted 35 sets of computational predictions for these host-guest systems, based on methods ranging from simple docking, to extensive free energy simulations, to quantum mechanical calculations. Over half of the predictions provided better correlations with experiment than two simple null models, but most methods underperformed the null models in terms of root mean squared error and linear regression slope. Interestingly, the overall performance across all SAMPL4 submissions was similar to that for the prior SAMPL3 host-guest challenge, although the experimentalists took steps to simplify the current challenge. While some methods performed fairly consistently across both hosts, no single approach emerged as consistent top performer, and the nonsystematic nature of the various submissions made it impossible to draw definitive conclusions regarding the best choices of energy models or sampling algorithms. Salt effects emerged as an issue in the calculation of absolute binding affinities of cucurbit[7]uril-guest systems, but were not expected to affect the relative affinities significantly. Useful directions for future rounds of the challenge might involve encouraging participants to carry out some calculations that replicate each others' studies, and to systematically explore parameter options.

Correction to: Associations between attention-deficit/hyperactivity disorder and autoimmune diseases are modified by sex: a population-based cross-sectional study.

PubMed

Hegvik, Tor-Arne; Instanes, Johanne Telnes; Haavik, Jan; Klungsøyr, Kari; Engeland, Anders

2018-05-01

The article "Associations between attention-deficit/hyperactivity disorder and autoimmune diseases are modified by sex: a population-based cross-sectional study", written by Tor-Arne Hegvik, Johanne Telnes Instanes, Jan Haavik, Kari Klungsøyr and Anders Engeland, was originally published electronically on the publisher's internet portal (currently SpringerLink) on October 5, 2017 without open access due to an error by the Springer editorial office in the processing of this article. The authors had originally opted for open access.

Preparing for a Guest Clinician's Rehearsal with Your Choir: Inviting a Guest Director to Work with Your Choir Can Bring Fresh Perspectives and Reinforce Basic Concepts

ERIC Educational Resources Information Center

Lanier, Brian

2007-01-01

As choral directors across the country work to prepare their choirs for concerts, festivals, and contests, it is a common practice for them to invite a guest clinician to attend rehearsals for guidance and assistance. The rationale for this idea is logical and simple--two heads are better than one. However, the actual visit can be anything from a…

β-Cyclodextrin's orientation onto TiO2 and its paradoxical role in guest's photodegradation.

PubMed

Zhang, Xu; Yang, Zixin; Li, Xuankun; Deng, Nansheng; Qian, Shahua

2013-01-28

This work revealed that β-cyclodextrin was attached onto the surface of TiO(2) predominately by its secondary ring side, which caused paradoxical functions of β-cyclodextrin in the photodegradation of the four bisphenols. The equilibrium between the guest adsorbed through β-cyclodextrin onto TiO(2) and the one locked in β-CD in water could also change the role of β-cyclodextrin in the degradation of a certain guest.

Heterogeneous VM Replication: A New Approach to Intrusion Detection, Active Response and Recovery in Cloud Data Centers

DTIC Science & Technology

2015-08-17

from the same execution history, and cost-effective active response by proactively setting up standby VM replicas: migration from a compromised VM...the guest OSes system call code to be reused inside a “shadowed” portion of the context of the out-of- guest inspection program. Besides...by the rootkits in cloud environments. RootkitDet detects rootkits by identifying suspicious code region in the kernel space of guest OSes through

Neutral Guest Capture via Lewis Acid/Base Molecular Square Receptors. X-ray Crystal Structure of {Cyclobis[(cis-(dppp)Pt(4-ethynylpyridyl)(2))(cis- (PEt(3))(2)Pt)]Ag(2)}(+6)(phenazine)- ((-)OSO(2)CF(3))(6).

PubMed

Whiteford, Jeffery A.; Stang, Peter J.; Huang, Songping D.

1998-10-19

Interaction of {cyclobis[(cis-(dppp)Pt(4-ethynylpyridyl)(2))(cis-(L)M)]Ag(2)}(+6)((-)OSO(2)CF(3))(6), where M = Pt(II) or Pd(II) and L = dppp or 2PEt(3), with pyridine, pyrazine, phenazine, or 4,4'-dipyridyl ketone results in coordination Lewis acid/base host-guest assemblies via the "pi-tweezer effect" and mono or bis neutral guest coordination. All host-guest complexes are air stable microcrystalline solids with decomposition points greater than 170 degrees C. The homometallic Pt(II) receptors are more stable than the heteroaromatic Pt(II)-Pd(II) receptors toward heteratom-containing aromatic guests. The X-ray crystal structure of the host-guest complex {cyclobis[(cis-(dppp)Pt(4-ethynylpyridyl)(2))(cis-(PEt(3))(2)Pt)]Ag(2)}(+6)(phenazine)((-)OSO(2)CF(3))(6) is reported. The crystals with the empirical formula C(62)H(68)AgF(9)N(3)O(9)P(4)Pt(2)S(3) are triclinic P&onemacr; with a = 12.3919(8) Å, b = 17.160(1) Å, c = 18.932(1) Å, alpha = 90.892(1) degrees, beta = 97.127(1) degrees, gamma = 89.969(1) degrees, and Z = 2.

Guest Programmable Multistep Spin Crossover in a Porous 2-D Hofmann-Type Material.

PubMed

Murphy, Michael J; Zenere, Katrina A; Ragon, Florence; Southon, Peter D; Kepert, Cameron J; Neville, Suzanne M

2017-01-25

The spin crossover (SCO) phenomenon defines an elegant class of switchable materials that can show cooperative transitions when long-range elastic interactions are present. Such materials can show multistepped transitions, targeted both fundamentally and for expanded data storage applications, when antagonistic interactions (i.e., competing ferro- and antiferro-elastic interactions) drive concerted lattice distortions. To this end, a new SCO framework scaffold, [Fe II (bztrz) 2 (Pd II (CN) 4 )]·n(guest) (bztrz = (E)-1-phenyl-N-(1,2,4-triazol-4-yl)methanimine, 1·n(guest)), has been prepared that supports a variety of antagonistic solid state interactions alongside a distinct dual guest pore system. In this 2-D Hofmann-type material we find that inbuilt competition between ferro- and antiferro-elastic interactions provides a SCO behavior that is intrinsically frustrated. This frustration is harnessed by guest exchange to yield a very broad array of spin transition characters in the one framework lattice (one- (1·(H 2 O,EtOH)), two- (1·3H 2 O) and three-stepped (1·∼2H 2 O) transitions and SCO-deactivation (1)). This variety of behaviors illustrates that the degree of elastic frustration can be manipulated by molecular guests, which suggests that the structural features that contribute to multistep switching may be more subtle than previously anticipated.

Tunable Two-color Luminescence and Host-guest Energy Transfer of Fluorescent Chromophores Encapsulated in Metal-Organic Frameworks

NASA Astrophysics Data System (ADS)

Yan, Dongpeng; Tang, Yanqun; Lin, Heyang; Wang, Dan

2014-03-01

Co-assembly of chromophore guests with host matrices can afford materials which have photofunctionalities different from those of individual components. Compared with clay and zeolite materials, the use of metal-organic frameworks (MOFs) as a host structure for fabricating luminescent host-guest materials is still at an early stage. Herein, we report the incorporation of a laser dye, 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM), into stilbene-based and naphthalene-based MOF systems. The resulting materials exhibit blue/red two-color emission, and the intensity ratio of blue to red fluorescence varies in different planes within the MOF crystal as detected by 3D confocal fluorescence microscopy. The observed changes in ratiometric fluorescence suggest the occurrence of energy transfer from MOF host to DCM molecules, which can be further confirmed by periodic density functional theoretical (DFT) calculations. Moreover, selective changes in luminescence behavior are observed on treating the guest@MOF samples with volatile organic compounds (methanol, acetone and toluene), indicating that these host-guest systems have potential applications as fluorescence sensors. It can be expected that by rational selection of MOF hosts and guest chromophores with suitable emissive colors and energy levels, a wide variety of multi-color luminescent and energy-transfer systems can readily be prepared in a similar manner.

Environmental Sciences Division annual progress report for period ending September 30, 1994

DOE Office of Scientific and Technical Information (OSTI.GOV)

NONE

1994-12-31

This progress report summarizes the research and development activities conducted in the Environmental Sciences Division (ESD) of Oak Ridge National Laboratory during fiscal year (FY) 1994, which extended from October 1, 1993, through September 30, 1994. The report is structured to provide descriptions of current activities and accomplishments in each of the division`s major organizational units. Following the sections describing the organizational units are sections highlighting ESD Scientific, Technical, and Administrative Achievement awards and listing information necessary to covey the scope of the work in the division. An organizational chart of staff and long-term guests who wee in ESD atmore » the end of FY 1994 is located in the final section of the report.« less

Cucurbituril mediated single molecule detection and identification via recognition tunneling.

PubMed

Xiao, Bohuai; Liang, Feng; Liu, Simin; Im, JongOne; Li, Yunchuan; Liu, Jing; Zhang, Bintian; Zhou, Jianghao; He, Jin; Chang, Shuai

2018-06-08

Recognition tunneling (RT) is an emerging technique for investigating single molecules in a tunnel junction. We have previously demonstrated its capability of single molecule detection and identification, as well as probing the dynamics of intermolecular bonding at the single molecule level. Here by introducing cucurbituril as a new class of recognition molecule, we demonstrate a powerful platform for electronically investigating the host-guest chemistry at single molecule level. In this report, we first investigated the single molecule electrical properties of cucurbituril in a tunnel junction. Then we studied two model guest molecules, aminoferrocene and amantadine, which were encapsulated by cucurbituril. Small differences in conductance and lifetime can be recognized between the host-guest complexes with the inclusion of different guest molecules. By using a machine learning algorithm to classify the RT signals in a hyper dimensional space, the accuracy of guest molecule recognition can be significantly improved, suggesting the possibility of using cucurbituril molecule for single molecule identification. This work enables a new class of recognition molecule for RT technique and opens the door for detecting a vast variety of small molecules by electrical measurements.

Host-guest chemistry of dendrimer-drug complexes. 2. Effects of molecular properties of guests and surface functionalities of dendrimers.

PubMed

Hu, Jingjing; Cheng, Yiyun; Wu, Qinglin; Zhao, Libo; Xu, Tongwen

2009-08-06

The host-guest chemistry of dendrimer-drug complexes is investigated by NMR techniques, including (1)H NMR and 2D-NOESY studies. The effects of molecular properties of drug molecules (protonation ability and spatial steric hindrance of charged groups) and surface functionalities of dendrimers (positively charged amine groups and negatively charged carboxylate groups) on the host-guest interactions are discussed. Different interaction mechanisms between dendrimers and drug molecules are proposed on the basis of NMR results. Primary amine- and secondary amine-containing drugs preferentially bind to negatively charged dendrimers by strong electrostatic interactions, whereas tertiary amine and quaternary ammonium-containing drugs have weak binding ability with dendrimers due to relatively low protonation ability of the tertiary amine group and serious steric hindrance of the quaternary ammonium group. Positively charged drugs locate only on the surface of negatively charged dendrimers, whereas negatively charged drugs locate both on the surface and in the interior cavities of positively charged dendrimers. The host-guest chemistry of dendrimer-drug complexes is promising for the development of new drug delivery systems.

Organic Nanoflowers from a Wide Variety of Molecules Templated by a Hierarchical Supramolecular Scaffold.

PubMed

Negrón, Luis M; Díaz, Tanya L; Ortiz-Quiles, Edwin O; Dieppa-Matos, Diómedes; Madera-Soto, Bismark; Rivera, José M

2016-03-15

Nanoflowers (NFs) are flowered-shaped particles with overall sizes or features in the nanoscale. Beyond their pleasing aesthetics, NFs have found a number of applications ranging from catalysis, to sensing, to drug delivery. Compared to inorganic based NFs, their organic and hybrid counterparts are relatively underdeveloped mostly because of the lack of a reliable and versatile method for their construction. We report here a method for constructing NFs from a wide variety of biologically relevant molecules (guests), ranging from small molecules, like doxorubicin, to biomacromolecules, like various proteins and plasmid DNA. The method relies on the encapsulation of the guests within a hierarchically structured particle made from supramolecular G-quadruplexes. The size and overall flexibility of the guests dictate the broad morphological features of the resulting NFs, specifically, small and rigid guests favor the formation of NFs with spiky petals, while large and/or flexible guests promote NFs with wide petals. The results from experiments using confocal fluorescence microscopy, and scanning electron microscopy provides the basis for the proposed mechanism for the NF formation.

Testing a Theory-Based Health Communication Program: A Replication of Go Sun Smart in Outdoor Winter Recreation

PubMed Central

ANDERSEN, PETER A.; BULLER, DAVID B.; WALKOSZ, BARBARA J.; MALOY, JULIE; SCOTT, MICHAEL D.; CUTTER, GARY R.; DIGNAN, MARK B.

2010-01-01

The epidemic of preventable skin cancer in the United States creates an urgent need for health communication campaigns to improve sun protection. Go Sun Smart (GSS), a theory-driven multichannel health communication campaign showed positive effects on sun safety behaviors of employees and guests in a randomized trial at high-altitude ski areas. In this article we report findings from the North American GSS campaign for guests at ski areas that comprosed the original control-group resorts, replicating the results of the original guest intervention. Results showed that after GSS was deployed, guests at the original control group ski areas increased sun protection and reported greater recall of sun safety messages. Conversely, GSS had no effect on sunburning attitudes or self-efficacy beliefs. Like the original GSS guest intervention, the present study found that greater exposure to GSS messages was associated with greater use of sunscreen, sunscreen lip balm, and face covering, but not gloves or overall sun protection. There was no evidence that GSS decreased sunburning or attitudes and self-efficacy beliefs regarding sun safety. PMID:19466647

Self-Healing and Thermo-Responsive Dual-Crosslinked Alginate Hydrogels based on Supramolecular Inclusion Complexes

PubMed Central

Miao, Tianxin; Fenn, Spencer L.; Charron, Patrick N.; Oldinski, Rachael A.

2015-01-01

β-cyclodextrin (β-CD), with a lipophilic inner cavity and hydrophilic outer surface, interacts with a large variety of non-polar guest molecules to form non-covalent inclusion complexes. Conjugation of β-CD onto biomacromolecules can form physically-crosslinked hydrogel networks upon mixing with a guest molecule. Herein describes the development and characterization of self-healing, thermo-responsive hydrogels, based on host-guest inclusion complexes between alginate-graft-β-CD and Pluronic® F108 (poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol)). The mechanics, flow characteristics, and thermal response were contingent on the polymer concentrations, and the host-guest molar ratio. Transient and reversible physical crosslinking between host and guest polymers governed self-assembly, allowing flow under shear stress, and facilitating complete recovery of the material properties within a few seconds of unloading. The mechanical properties of the dual-crosslinked, multi-stimuli responsive hydrogels were tuned as high as 30 kPa at body temperature, and are advantageous for biomedical applications such as drug delivery and cell transplantation. PMID:26509214

Energy-cascade organic photovoltaic devices incorporating a host-guest architecture.

PubMed

Menke, S Matthew; Holmes, Russell J

2015-02-04

In planar heterojunction organic photovoltaic devices (OPVs), broad spectral coverage can be realized by incorporating multiple molecular absorbers in an energy-cascade architecture. Here, this approach is combined with a host-guest donor layer architecture previously shown to optimize exciton transport for the fluorescent organic semiconductor boron subphthalocyanine chloride (SubPc) when diluted in an optically transparent host. In order to maximize the absorption efficiency, energy-cascade OPVs that utilize both photoactive host and guest donor materials are examined using the pairing of SubPc and boron subnaphthalocyanine chloride (SubNc), respectively. In a planar heterojunction architecture, excitons generated on the SubPc host rapidly energy transfer to the SubNc guest, where they may migrate toward the dissociating, donor-acceptor interface. Overall, the incorporation of a photoactive host leads to a 13% enhancement in the short-circuit current density and a 20% enhancement in the power conversion efficiency relative to an optimized host-guest OPV combining SubNc with a nonabsorbing host. This work underscores the potential for further design refinements in planar heterojunction OPVs and demonstrates progress toward the effective separation of functionality between constituent OPV materials.

Giant Negative Area Compressibility Tunable in a Soft Porous Framework Material.

PubMed

Cai, Weizhao; Gładysiak, Andrzej; Anioła, Michalina; Smith, Vincent J; Barbour, Leonard J; Katrusiak, Andrzej

2015-07-29

A soft porous material [Zn(L)2(OH)2]n·Guest (where L is 4-(1H-naphtho[2,3-d]imidazol-1-yl)benzoate, and Guest is water or methanol) exhibits the strongest ever observed negative area compressibility (NAC), an extremely rare property, as at hydrostatic pressure most materials shrink in all directions and few expand in one direction. This is the first NAC reported in metal-organic frameworks (MOFs), and its magnitude, clearly visible and by far the highest of all known materials, can be reversibly tuned by exchanging guests adsorbed from hydrostatic fluids. This counterintuitive strong NAC of [Zn(L)2(OH)2]n·Guest arises from the interplay of flexible [-Zn-O(H)-]n helices with layers of [-Zn-L-]4 quadrangular puckered rings comprising large channel voids. The compression of helices and flattening of puckered rings combine to give a giant piezo-mechanical response, applicable in ultrasensitive sensors and actuators. The extrinsic NAC response to different hydrostatic fluids is due to varied host-guest interactions affecting the mechanical strain within the range permitted by exceptionally high flexibility of the framework.

Tailoring the Adsorption and Reaction Chemistry of the Metal-Organic Frameworks UiO-66, UiO-66-NH2, and HKUST-1 via the Incorporation of Molecular Guests.

PubMed

Ploskonka, Ann M; DeCoste, Jared B

2017-06-28

Metal-organic frameworks (MOFs) are versatile materials highly regarded for their porous nature. Depending on the synthetic method, various guest molecules may remain in the pores or can be systematically loaded for various reasons. Herein, we present a study that explores the effect of guest molecules on the adsorption and reactivity of the MOF in both the gas phase and solution. The differences between guest molecule interactions and the subsequent effects on their activity are described for each system. Interestingly, different effects are observed and described in detail for each class of guest molecules studied. We determine that there is a strong effect of alcohols with the secondary building unit of UiO MOFs, while Lewis bases have an effect on the reactivity of the -NH 2 group in UiO-66-NH 2 and adsorption by the coordinatively unsaturated copper sites in HKUST-1. These effects must be considered when determining synthesis and activation methods of MOFs toward various applications.

Redox-responsive self-healing materials formed from host–guest polymers

PubMed Central

Nakahata, Masaki; Takashima, Yoshinori; Yamaguchi, Hiroyasu; Harada, Akira

2011-01-01

Expanding the useful lifespan of materials is becoming highly desirable, and self-healing and self-repairing materials may become valuable commodities. The formation of supramolecular materials through host–guest interactions is a powerful method to create non-conventional materials. Here we report the formation of supramolecular hydrogels and their redox-responsive and self-healing properties due to host–guest interactions. We employ cyclodextrin (CD) as a host molecule because it is environmentally benign and has diverse applications. A transparent supramolecular hydrogel quickly forms upon mixing poly(acrylic acid) (pAA) possessing β-CD as a host polymer with pAA possessing ferrocene as a guest polymer. Redox stimuli induce a sol−gel phase transition in the supramolecular hydrogel and can control self-healing properties such as re-adhesion between cut surfaces. PMID:22027591

EPR Studies of the Binding Properties, Guest Dynamics, and Inner-Space Dimensions of a Water-Soluble Resorcinarene Capsule.

PubMed

Ayhan, Mehmet Menaf; Casano, Gilles; Karoui, Hakim; Rockenbauer, Antal; Monnier, Valérie; Hardy, Micaël; Tordo, Paul; Bardelang, David; Ouari, Olivier

2015-11-09

Nitroxide free radicals have been used to study the inner space of one of Rebek's water-soluble capsules. EPR and (1) H NMR spectroscopy, ESI-MS, and DFT calculations showed a preference for the formation of 1:2 complexes. EPR titrations allowed us to determine binding constants (Ka ) in the order of 10(7)  M(-2) . EPR spectral-shape analysis provided information on the guest rotational dynamics within the capsule. The interplay between optimum hydrogen bonding upon capsule formation and steric strain for guest accommodation highlights some degree of flexibility for guest inclusion, particularly at the center of the capsule where the hydrogen bond seam can be barely distorted or slightly disturbed. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

A New Scope and a New Editorial Team for The American Journal of Pathology.

PubMed

Furie, Martha B

2018-01-01

This Editorial describes new enhanced scope of The American Journal of Pathology and introduces its new editorial team. Copyright © 2018 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved.

EDITORIAL: New scope for Journal of Physics D: Applied Physics New scope for Journal of Physics D: Applied Physics

NASA Astrophysics Data System (ADS)

Roche, Olivia; Margaritondo, Giorgio

2011-10-01

After five years of significant growth and development, and with the Impact Factor (IF) now firmly placed over 2.0, Journal of Physics D: Applied Physics (JPhysD) has seen a double change at the helm in the last 12 months. Giorgio Margaritondo from École Polytechnique Fédérale de Lausanne, Switzerland took over as Editor-in-Chief from Pallab Bhattacharya, while Olivia Roche took over as Publisher from Sarah Quin. We inherited a strong, successful journal. With its IF of 2.105, excellent publication times and flexible, responsive management, JPhysD has established itself as the place to publish high-quality research papers in applied physics. Having introduced Fast Track Communications (FTCs) in 2008, we also became an outlet for short, high-impact letter-like articles. FTCs, with their particularly strict refereeing, add an extra mark of quality to the content. We are keen to continue developing and strengthening the journal to make it the first choice for authors and readers. We are lucky to be working in the exciting, rapidly-changing field of applied physics. The pace of development can sometimes be breathtaking. One of our first actions on taking over the journal was to look again at its scope. We felt it was time to respond to all the recent developments, to ensure that our scope encompasses the latest, cutting-edge research topics—so that it matches the reality of applied physics today. The first issue of the journal that will see this new scope implemented will be issue 41 of this volume. We would like to thank the entire Editorial Board for their hard work during this scope review. The greatest change during this review has been the merging of two sections, 'Functional surfaces and interfaces' and 'Structure and properties of matter', into a new section entitled 'Condensed matter, interfaces and related nanostructures'. This change reflects the significant developments in these connected fields in recent years, particularly the natural evolution of surface and interface science—and much of condensed matter physics—towards nanoscience. We are sure this merged section will bring the authors' work in both of these sections to a broader audience. All sections have seen some additions to, and removals from, the scope. A full copy of the new scope can be found at the end of this editorial. Some of the areas from which we are particularly keen to receive more papers include: photovoltaics, terahertz science and technology, plasmonics, spintronics, bulk magnetic materials, biomagnetism, graphene, plasma medicine and plasma propulsion. Many others are closely monitored as potential developments and we will act rapidly whenever necessary to avoid missing opportunities. As part of these changes, we will be asking all authors to explain their choice of journal section within the new scope. We will also ask authors to submit a short statement of the applications or potential applications of their work. This will allow us to assess the suitability of the research for the journal but will also allow us to highlight the most exciting research we publish, ensuring it gets the highest possible visibility. We would like to take this opportunity to thank our hard-working and dedicated publishing team and Editorial Board. We would also like to thank the authors and referees of JPhysD, without whom the journal could not exist. We believe these changes will allow further strengthening, development and growth of the journal and we look forward to a positive future for JPhysD.

Protecting Files Hosted on Virtual Machines With Out-of-Guest Access Control

DTIC Science & Technology

2017-12-01

analyzes the design and methodology of the implemented mechanism, while Chapter 4 explains the test methodology, test cases, and performance testing ...SACL, we verify that the user or group accessing the file has sufficient permissions. If that is correct, the callback function returns control to...ferify. In the first section, we validate our design of ferify. Next, we explain the tests we performed to verify that ferify has the results we expected

PREFACE: 31st European Physical Society Conference on Plasma Physics

NASA Astrophysics Data System (ADS)

Dendy, Richard

2004-12-01

This special issue of Plasma Physics and Controlled Fusion comprises refereed papers contributed by invited speakers at the 31st European Physical Society Conference on Plasma Physics. The conference was jointly hosted by the Rutherford Appleton Laboratory, by the EURATOM/UKAEA Fusion Association and by Imperial College London, where it took place from 28 June to 2 July 2004. The overall agenda for this conference was set by the Board of the Plasma Physics Division of the European Physical Society, chaired by Friedrich Wagner (MPIPP, Garching) and his successor Jo Lister (CRPP, Lausanne). It built on developments in recent years, by further increasing the scientific diversity of the conference programme, whilst maintaining its depth and quality. A correspondingly diverse Programme Committee was set up, whose members are listed below. The final task of the Programme Committee has been the preparation of this special issue. In carrying out this work, as in preparing the scientific programme of the conference, the Programme Committee formed specialist subcommittees representing the different fields of plasma science. The chairmen of these subcommittees, in particular, accepted a very heavy workload on behalf of their respective research communities. It is a great pleasure to take this opportunity to thank: Emilia R Solano (CIEMAT, Madrid), magnetic confinement fusion; Jürgen Meyer-ter-Vehn (MPQ, Garching), laser-plasma interaction and beam plasma physics; and Jean-Luc Dorier (CRPP, Lausanne), dusty plasmas. The relatively few papers in astrophysical and basic plasma physics were co-ordinated by a small subcommittee which I led. Together with Peter Norreys (RAL, Chilton), we five constitute the editorial team for this special issue. The extensive refereeing load, compressed into a short time interval, was borne by the Programme Committee members and by many other experts, to whom this special issue owes much. We are also grateful to the Local Organizing Committee chaired by Henry Hutchinson (RAL, Chilton), and to the Plasma Physics and Controlled Fusion journal team (Institute of Physics Publishing, Bristol), for their work on this conference. At the 2004 European Physical Society Conference on Plasma Physics, plenary invited speakers whose talks spanned the entire field were followed, each day, by multiple parallel sessions which also included invited talks. Invited speakers in both these categories were asked to contribute papers to this special issue (the contributed papers at this conference, and at all recent conferences in this series, are archived at http://epsppd.epfl.ch). The Programme Committee is very grateful to the many invited speakers who have responded positively to this request. Invited papers appear here in their order of presentation during the week beginning 28 June 2004; this ordering provides an echo of the character of the conference, as it was experienced by those who took part. Programme Committee 2004 Professor Richard Dendy UKAEA Culham Division, UK Chairman and guest editor Dr Jean-Luc Dorier Centre de Recherches en Physique des Plasmas, Lausanne, Switzerland (Co-ordinator of dusty plasmas and guest editor) Professor Jürgen Meyer-ter-Vehn Max-Planck-Institut für Quantenoptik, Garching, Germany (Co-ordinator of laser-plasma interaction and beam plasma physics and guest editor) Dr Peter Norreys Rutherford Appleton Laboratory, Chilton, UK (Scientific Secretary and guest editor) Dr Emilia R Solano CIEMAT Laboratorio Nacional de Fusión, Madrid, Spain ( Co-ordinator of magnetic confinement fusion and guest editor) Dr Shalom Eliezer Soreq Nuclear Research Centre, Israel Dr Wim Goedheer FOM-Instituut voor Plasmafysica, Rijnhuizen, Netherlands Professor Henry Hutchinson Rutherford Appleton Laboratory, Chilton, UK Professor John Kirk Max-Planck-Institut für Kernphysik, Heidelberg, Germany Dr Raymond Koch Ecole Royale Militaire/Koninklijke Militaire School, Brussels, Belgium Professor Gerrit Kroesen Technische Universiteit Eindhoven, Netherlands Dr Martin Lampe Naval Research Laboratory, Washington DC, USA Dr Jo Lister Centre de Recherches en Physique des Plasmas, Lausanne, Switzerland Dr Paola Mantica Istituto di Fisica del Plasma, Milan, Italy Professor Tito Mendonca Instituto Superior Tecnico, Lisbon, Portugal Dr Patrick Mora École Polytechnique, Palaiseau, France Professor Lennart Stenflo Umeå Universitet, Sweden Professor Paul Thomas CEA Cadarache, Saint-Paul-lez-Durance, France Professor Friedrich Wagner Max-Planck-Institut fr Plasmaphysik, Garching, Germany Professor Hannspeter Winter Technische Universität Wien, Austria

Stimuli Responsive Systems Constructed Using Cucurbit[n]uril-Type Molecular Containers

PubMed Central

2015-01-01

Conspectus This Account focuses on stimuli responsive systems that function in aqueous solution using examples drawn from the work of the Isaacs group using cucurbit[n]uril (CB[n]) molecular containers as key recognition elements. Our entry into the area of stimuli responsive systems began with the preparation of glycoluril derived molecular clips that efficiently distinguish between self and nonself by H-bonds and π–π interactions even within complex mixtures and therefore undergo self-sorting. We concluded that the selectivity of a wide variety of H-bonded supramolecular assemblies was higher than previously appreciated and that self-sorting is not exceptional behavior. This lead us to examine self-sorting within the context of CB[n] host–guest chemistry in water. We discovered that CB[n] homologues (CB[7] and CB[8]) display remarkably high binding affinity (Ka up to 1017 M–1) and selectivity (ΔΔG) toward their guests, which renders CB[n]s prime components for the construction of stimuli responsive host–guest systems. The CB[7]·adamantaneammonium ion complex, which is particularly privileged (Ka = 4.2 × 1012 M–1), was introduced by us as a stimulus to trigger constitutional changes in multicomponent self-sorting systems. For example, we describe how the free energy associated with the formation of host–guest complexes of CB[n]-type receptors can drive conformational changes of included guests like triazene–arylene foldamers and cationic calix[4]arenes, as well as induced conformational changes (e.g., ammonium guest size dependent homotropic allostery, metal ion triggered folding, and heterochiral dimerization) of the hosts themselves. Many guests display large pKa shifts within their CB[n]–guest complexes, which we used to promote pH controlled guest swapping and thermal trans-to-cis isomerization of azobenzene derivatives. We also used the high affinity and selectivity of CB[7] toward its guests to outcompete an enzyme (bovine carbonic anhydrase) for a two-faced inhibitor, which allowed stimuli responsive regulation of enzymatic activity. These results prompted us to examine the use of CB[n]-type receptors in both in vitro and in vivo biological systems. We demonstrated that adamantaneammonium ion can be used to intracellularly sequester CB[7] from gold nanoparticles passivated with hexanediammonium ion·CB[7] complexes and thereby trigger cytotoxicity. CB[7] derivatives bearing a biotin targeting group enhance the cytotoxicity of encapsulated oxaliplatin toward L1210FR cells. Finally, acyclic CB[n]-type receptors function as solubilizing excipients for insoluble drugs for drug delivery purposes and as a broad spectrum reversal agent for the neuromuscular blocking agents rocuronium, vecuronium, and cis-atracurium in rats. The work highlights the great potential for integration of CB[n]-type receptors with biological systems. PMID:24785941

Engineering responsive polymer building blocks with host-guest molecular recognition for functional applications.

PubMed

Hu, Jinming; Liu, Shiyong

2014-07-15

CONSPECTUS: All living organisms and soft matter are intrinsically responsive and adaptive to external stimuli. Inspired by this fact, tremendous effort aiming to emulate subtle responsive features exhibited by nature has spurred the invention of a diverse range of responsive polymeric materials. Conventional stimuli-responsive polymers are constructed via covalent bonds and can undergo reversible or irreversible changes in chemical structures, physicochemical properties, or both in response to a variety of external stimuli. They have been imparted with a variety of emerging applications including drug and gene delivery, optical sensing and imaging, diagnostics and therapies, smart coatings and textiles, and tissue engineering. On the other hand, in comparison with molecular chemistry held by covalent bonds, supramolecular chemistry built on weak and reversible noncovalent interactions has emerged as a powerful and versatile strategy for materials fabrication due to its facile accessibility, extraordinary reversibility and adaptivity, and potent applications in diverse fields. Typically involving more than one type of noncovalent interactions (e.g., hydrogen bonding, metal coordination, hydrophobic association, electrostatic interactions, van der Waals forces, and π-π stacking), host-guest recognition refers to the formation of supramolecular inclusion complexes between two or more entities connected together in a highly controlled and cooperative manner. The inherently reversible and adaptive nature of host-guest molecular recognition chemistry, stemming from multiple noncovalent interactions, has opened up a new platform to construct novel types of stimuli-responsive materials. The introduction of host-guest chemistry not only enriches the realm of responsive materials but also confers them with promising new applications. Most intriguingly, the integration of responsive polymer building blocks with host-guest recognition motifs will endow the former with further broadened responsiveness to external stimuli and accordingly more sophisticated functions. In this Account, we summarize recent progress in the field of responsive polymeric materials containing host-guest recognition motifs with selected examples and highlight their versatile functional applications, whereas small molecule-oriented host-guest supramolecular systems are excluded. We demonstrate how the introduction of host-guest chemistry into conventional polymer systems can modulate their responsive modes to external stimuli. Moreover, the responsive specificity and selectivity of polymeric systems can also be inherited from the host-guest recognition motifs, and these features provide extra advantages in terms of function integration. The following discussions are categorized in terms of design and functions, namely, host-guest chemistry toward the fabrication of responsive polymers and assemblies, optical sensing and imaging, drug and gene delivery, and self-healing materials. A concluding remark on future developments is also presented. We wish this prosperous field would incur more original and evolutionary ideas and benefit fundamental research and our daily life in a more convenient way.

Towards the fluorogenic detection of peroxide explosives through host-guest chemistry.

PubMed

Almenar, Estefanía; Costero, Ana M; Gaviña, Pablo; Gil, Salvador; Parra, Margarita

2018-04-01

Two dansyl-modified β-cyclodextrin derivatives ( 1 and 2 ) have been synthesized as host-guest sensory systems for the direct fluorescent detection of the peroxide explosives diacetone diperoxide (DADP) and triacetone triperoxide (TATP) in aqueous media. The sensing is based on the displacement of the dansyl moiety from the cavity of the cyclodextrin by the peroxide guest resulting in a decrease of the intensity of the fluorescence of the dye. Both systems showed similar fluorescent responses and were more sensitive towards TATP than DADP.

Insertion of Guest Molecules into a Mixed Ligand Metal-Organic Framework via Single-Crystal-to-Single Crystal Guest Exchange

DTIC Science & Technology

2014-07-01

powder x-ray diffraction (PXRD), thermogravimentric analysis (TGA), and Fourier transform infrared (FTIR). 15. SUBJECT TERMS Metal organic frame work...the inclusion by using a variety of analytical techniques, such as powder x-ray diffraction (PXRD), thermo-gravimetric analysis (TGA), Fourier...Characterizations Analysis of the MOF and the complexes with the MOF and the guest molecules was performed using an Agilent GC-MS (Model 6890N GC and Model 5973N

Editorial independence at medical journals owned by professional associations: a survey of editors.

PubMed

Davis, Ronald M; Müllner, Marcus

2002-10-01

The purpose of this study was to assess the degree of editorial independence at a sample of medical journals and the relationship between the journals and their owners. We surveyed the editors of 33 medical journals owned by not-for-profit organizations ("associations"), including 10 journals represented on the International Committee of Medical Journal Editors (nine of which are general medical journals) and a random sample of 23 specialist journals with high impact factors that are indexed by the Institute for Scientific Information. The main outcome measures were the authority to hire, fire, and oversee the work of the editor; the editor's tenure and financial compensation; control of the journal's budget; publication of material about the association; and the editor's perceptions about editorial independence and pressure over editorial content. Of the 33 editors, 23 (70%) reported having complete editorial freedom, and the remainder reported a high level of freedom (a score of > or = 8, where 10 equals complete editorial freedom and 1 equals no editorial freedom). Nevertheless, a substantial minority of editors reported having received at least some pressure in recent years over editorial content from the association's leadership (42%), senior staff (30%), or rank-and-file members (39%). The association's board of directors has the authority to hire (48%) or fire (55%) the editor for about half of the journals, and the editor reports to the board for 10 journals (30%). Twenty-three editors (70%) are appointed for a specific term (median term = 5 years). Three-fifths of the journals have no control over their profit, and the majority of journals use the association's legal counsel and/or media relations staff. Stronger safeguards are needed to give editors protection against pressure over editorial content, including written guarantees of editorial freedom and governance structures that support those guarantees. Strong safeguards are also needed because editors may have less freedom than they believe (especially if they have not yet tested their freedom in an area of controversy).

17 CFR 200.30-14 - Delegation of authority to the General Counsel.

Code of Federal Regulations, 2010 CFR

2010-04-01

...., the Investment Advisers Act of 1940, 15 U.S.C. 80b-1 et seq., the Securities Investor Protection Act... U.S.C. 80b-1 et seq.), the Securities Investor Protection Act of 1970 (15 U.S.C. 78aaa et seq.) and...] Editorial Note: For Federal Register citations affecting § 200.30-14, see the List of CFR Sections Affected...

Format Guide for Scientific and Technical Reports.

DTIC Science & Technology

1984-01-01

supported by the discussion. Graphkic Services The Graphic Services Section (Code 2632) provides a variety of layout and design services. Camera-ready artwork...complex typography , elaborate graphic elements, extensive computer printouts, and other unusual materials that explain the project. With few exceptions...2630 Publications Branch Office 222/253 72379 S Publications Control Center 222/253 73508 Editorial 222/253 72782 Graphic Services 222/234 72756 73989

Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (76th, Kansas City, Missouri, August 11-14, 1993). Part I: Journalism History.

ERIC Educational Resources Information Center

Association for Education in Journalism and Mass Communication.

The Journalism History section of this collection of conference presentations contains the following 15 papers: "Henry Ford's Newspaper: The 'Dearborn Independent,' 1919-1927" (James C. Foust); "Redefining the News?: Editorial Content and the 'Myth of Origin' Debate in Journalism History" (Elliot King); "'Nonpublicity' and…

Discussion of "Computational Electrocardiography: Revisiting Holter ECG Monitoring".

PubMed

Baumgartner, Christian; Caiani, Enrico G; Dickhaus, Hartmut; Kulikowski, Casimir A; Schiecke, Karin; van Bemmel, Jan H; Witte, Herbert

2016-08-05

This article is part of a For-Discussion-Section of Methods of Information in Medicine about the paper "Computational Electrocardiography: Revisiting Holter ECG Monitoring" written by Thomas M. Deserno and Nikolaus Marx. It is introduced by an editorial. This article contains the combined commentaries invited to independently comment on the paper of Deserno and Marx. In subsequent issues the discussion can continue through letters to the editor.

Climate change through an editorial lens

NASA Astrophysics Data System (ADS)

Nerlich, Brigitte

2018-06-01

Editorials provide an opportunity for international science journals to exert influence on professional scientists and wider public discourse. Now research shows how editorials on climate change in Nature and Science respond to societal events and reflect the national contexts in which these journals are situated.

Writing Editorials.

ERIC Educational Resources Information Center

Pappas, Marjorie L.

2003-01-01

Presents a thematic unit for middle schools on editorial writing, or persuasive writing, based on the Pathways Model for information skills lessons. Includes assessing other editorials; student research process journals; information literacy and process skills; and two lesson plans that involve library media specialists as well as teachers. (LRW)

The Design of Molecular Hosts, Guests, and Their Complexes.

ERIC Educational Resources Information Center

Cram, Donald J.

1988-01-01

Describes the origins, definitions, tools, and principles of host-guest chemistry. Gives examples of chiral recognition in complexation, of partial transacylase mimics, of caviplexes, and of a synthetic molecular cell. (Author/RT)

Electrospun Lipid Binding Proteins Composite Nanofibers with Antibacterial Properties.

PubMed

Tomaselli, Simona; Ramirez, Diego Omar Sanchez; Carletto, Riccardo Andrea; Varesano, Alessio; Vineis, Claudia; Zanzoni, Serena; Molinari, Henriette; Ragona, Laura

2017-04-01

Electrospinning is here used for the first time to prepare nanofibers including a host/guest complex in a keratin/poly(ethylene oxide) matrix. The host is a lipid binding protein and the guest is an insoluble bactericidal molecule, irgasan, bound within the protein internal cavity. The obtained nanofibers, characterized by scanning electron microscopy, exhibit excellent antibacterial activity toward Gram positive and negative bacteria, even with a moderate protein/irgasan cargo. Solution NMR studies, employed to provide molecular information on the cargo system, points to a micromolar affinity, compatible with both the electrospinning process and slow guest release. The versatility of the carrier protein, capable of interacting with a variety of druggable hydrophobic molecules, is exploitable for the development of innovative biomedical devices, whose properties can be tuned by the selected guest. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Molecular Sensing by Nanoporous Crystalline Polymers

PubMed Central

Pilla, Pierluigi; Cusano, Andrea; Cutolo, Antonello; Giordano, Michele; Mensitieri, Giuseppe; Rizzo, Paola; Sanguigno, Luigi; Venditto, Vincenzo; Guerra, Gaetano

2009-01-01

Chemical sensors are generally based on the integration of suitable sensitive layers and transducing mechanisms. Although inorganic porous materials can be effective, there is significant interest in the use of polymeric materials because of their easy fabrication process, lower costs and mechanical flexibility. However, porous polymeric absorbents are generally amorphous and hence present poor molecular selectivity and undesired changes of mechanical properties as a consequence of large analyte uptake. In this contribution the structure, properties and some possible applications of sensing polymeric films based on nanoporous crystalline phases, which exhibit all identical nanopores, will be reviewed. The main advantages of crystalline nanoporous polymeric materials with respect to their amorphous counterparts are, besides a higher selectivity, the ability to maintain their physical state as well as geometry, even after large guest uptake (up to 10–15 wt%), and the possibility to control guest diffusivity by controlling the orientation of the host polymeric crystalline phase. The final section of the review also describes the ability of suitable polymeric films to act as chirality sensors, i.e., to sense and memorize the presence of non-racemic volatile organic compounds. PMID:22303150

Controlled-release formulation of antihistamine based on cetirizine zinc-layered hydroxide nanocomposites and its effect on histamine release from basophilic leukemia (RBL-2H3) cells

PubMed Central

Hasan, Samer; Ali, Hussein Al; Al-Qubaisi, Mothanna; Hussein, Mohd Zobir; Ismail, Maznah; Zainal, Zulkarnain; Hakim, Muhammad Nazrul

2012-01-01

A controlled-release formulation of an antihistamine, cetirizine, was synthesized using zinc-layered hydroxide as the host and cetirizine as the guest. The resulting well-ordered nanolayered structure, a cetirizine nanocomposite “CETN,” had a basal spacing of 33.9 Å, averaged from six harmonics observed from X-ray diffraction. The guest, cetirizine, was arranged in a horizontal bilayer between the zinc-layered hydroxide (ZLH) inorganic interlayers. Fourier transform infrared spectroscopy studies indicated that the intercalation takes place without major change in the structure of the guest and that the thermal stability of the guest in the nanocomposites is markedly enhanced. The loading of the guest in the nanocomposites was estimated to be about 49.4% (w/w). The release study showed that about 96% of the guest could be released in 80 hours by phosphate buffer solution at pH 7.4 compared with about 97% in 73 hours at pH 4.8. It was found that release was governed by pseudo-second order kinetics. Release of histamine from rat basophilic leukemia cells was found to be more sensitive to the intercalated cetirizine in the CETN compared with its free counterpart, with inhibition of 56% and 29%, respectively, at 62.5 ng/mL. The cytotoxicity assay toward Chang liver cells line show the IC50 for CETN and ZLH are 617 and 670 μg/mL, respectively. PMID:22848164

Transforming MOFs for energy applications using the guest@MOF concept

DOE PAGES

Ullman, Andrew M.; Brown, Jonathan W.; Foster, Michael E.; ...

2016-07-11

As the world transitions from fossil fuels to clean energy sources in the coming decades, many technological challenges will require chemists and material scientists to develop new materials for applications related to energy conversion, storage, and efficiency. Because of their unprecedented adaptability, metal–organic frameworks (MOFs) will factor strongly in this portfolio. By utilizing the broad synthetic toolkit provided by the fields of organic and inorganic chemistry, MOF pores can be customized to suit a particular application. Of particular importance is the ability to tune the strength of the interaction between the MOF pores and guest molecules. By cleverly controlling thesemore » MOF–guest interactions, the chemist may impart new function into the Guest@MOF materials otherwise lacking in vacant MOF. Herein, we highlight the concept of the Guest@MOF as it relates to our efforts to develop these materials for energy-related applicatons. Additionally, our work in the areas of H 2 and noble gas storage, hydrogenolysis of biomass, light-harvesting, and conductive materials will be discussed. Of relevance to light-harvesting applications, we report for the first time a postsynthetic modification strategy for increasing the loading of a light-sensitive electron-donor molecule in the pores of a functionalized MIL-101 structure. Through the demonstrated versatility of these approaches, we show that, by treating guest molecules as integral design elements for new MOF constructs, MOF science can have a significant impact on the advancement of clean energy technologies.« less

Transforming MOFs for Energy Applications Using the Guest@MOF Concept.

PubMed

Ullman, Andrew M; Brown, Jonathan W; Foster, Michael E; Léonard, François; Leong, Kirsty; Stavila, Vitalie; Allendorf, Mark D

2016-08-01

As the world transitions from fossil fuels to clean energy sources in the coming decades, many technological challenges will require chemists and material scientists to develop new materials for applications related to energy conversion, storage, and efficiency. Because of their unprecedented adaptability, metal-organic frameworks (MOFs) will factor strongly in this portfolio. By utilizing the broad synthetic toolkit provided by the fields of organic and inorganic chemistry, MOF pores can be customized to suit a particular application. Of particular importance is the ability to tune the strength of the interaction between the MOF pores and guest molecules. By cleverly controlling these MOF-guest interactions, the chemist may impart new function into the Guest@MOF materials otherwise lacking in vacant MOF. Herein, we highlight the concept of the Guest@MOF as it relates to our efforts to develop these materials for energy-related applicatons. Our work in the areas of H2 and noble gas storage, hydrogenolysis of biomass, light-harvesting, and conductive materials will be discussed. Of relevance to light-harvesting applications, we report for the first time a postsynthetic modification strategy for increasing the loading of a light-sensitive electron-donor molecule in the pores of a functionalized MIL-101 structure. Through the demonstrated versatility of these approaches, we show that, by treating guest molecules as integral design elements for new MOF constructs, MOF science can have a significant impact on the advancement of clean energy technologies.

Special Section Guest Editorial: Laser Damage

DOE Office of Scientific and Technical Information (OSTI.GOV)

Gruzdev, Vitaly E.; Shinn, Michelle D.

2012-11-09

Laser damage of optical materials, first reported in 1964, continues to limit the output energy and power of pulsed and continuous-wave laser systems. In spite of some 48 years of research in this area, interest from the international laser community to laser damage issues remains at a very high level and does not show any sign of decreasing. Moreover, it grows with the development of novel laser systems, for example, ultrafast and short-wavelength lasers that involve new damage effects and specific mechanisms not studied before. This interest is evident from the high level of attendance and presentations at the annualmore » SPIE Laser Damage Symposium (aka, Boulder Damage Symposium) that has been held in Boulder, Colorado, since 1969. This special section of Optical Engineering is the first one devoted to the entire field of laser damage rather than to a specific part. It is prepared in response to growing interest from the international laser-damage community. Some papers in this special section were presented at the Laser Damage Symposium; others were submitted in response to the general call for papers for this special section. The 18 papers compiled into this special section represent many sides of the broad field of laser-damage research. They consider theoretical studies of the fundamental mechanisms of laser damage including laser-driven electron dynamics in solids (O. Brenk and B. Rethfeld; A. Nikiforov, A. Epifanov, and S. Garnov; T. Apostolova et al.), modeling of propagation effects for ultrashort high-intensity laser pulses (J. Gulley), an overview of mechanisms of inclusion-induced damage (M. Koldunov and A. Manenkov), the formation of specific periodic ripples on a metal surface by femtosecond laser pulses (M. Ahsan and M. Lee), and the laser-plasma effects on damage in glass (Y. Li et al). Material characterization is represented by the papers devoted to accurate and reliable measurements of absorption with special emphasis on thin films (C. Mühlig and S. Bublitz; B. Cho, E. Danielewicz, and J. Rudisill; W. Palm et al; and J. Lu et al.). Statistical treatment of measurements of the laser-damage threshold (J. Arenberg) and the relationship to damage mechanisms (F. Wagner et al.) represent the large subfield of laser-damage measurements. Various aspects of multilayer coating and thin-film characterization are considered in papers by B. Cho, J. Rudisill, and E. Danielewicz (spectral shift in multilayer mirrors) and R. Weber et al. (novel approach to damage studies based on third-harmonic generation microscopy). Of special interest for readers is the paper by C. Stolz that summarizes the results of four “thin-film damage competitions” organized as a part of the Laser Damage Symposium. Another paper is devoted to thermal annealing of damage precursors (N. Shen et al.). Finally, the influence of nano-size contamination on initiation of laser damage by ultrashort pulses is considered in paper of V. Komolov et al.« less

Circularly Polarized Luminescence from Inorganic Materials: Encapsulating Guest Lanthanide Oxides in Chiral Silica Hosts.

PubMed

Sugimoto, Masumi; Liu, Xin-Ling; Tsunega, Seiji; Nakajima, Erika; Abe, Shunsuke; Nakashima, Takuya; Kawai, Tsuyoshi; Jin, Ren-Hua

2018-05-02

Recently, circularly polarized luminescence (CPL)-active systems have become a very hot and interesting subject in chirality- and optics-related areas. The CPL-active systems are usually available by two approaches: covalently combining a luminescent centre to chiral motif or associating the guest of luminescent probe to a chiral host. However, all the chiral components in CPL materials were organic, although the luminescent components were alternatively organics or inorganics. Herein, the first totally inorganic CPL-active system by "luminescent guest-chiral host" strategy is proposed. Luminescent sub-10 nm lanthanide oxides (Eu 2 O 3 or Tb 2 O 3 ) nanoparticles (guests) were encapsulated into chiral non-helical SiO 2 nanofibres (host) through calcination of chiral SiO 2 hybrid nanofibres, trapping Eu 3+ (or Tb 3+ ). These lanthanide oxides display circular dichroism (CD) optical activity in the ultraviolet wavelength and CPL signals around at 615 nm for Eu 3+ and 545 nm for Tb 3+ . This work has implications for inorganic-based CPL-active systems by incorporation of various luminescent guests within chiral inorganic hosts. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Nonlinear optical moiety-doped polymers with improved optical properties for photonic devices

NASA Astrophysics Data System (ADS)

Lee, Myung-Hyun; Kim, Hwan K.; Kim, Hye-Young; Lee, Hyuek J.; Kang, K. H.; Won, Yong Hyub; Jeon, Eunsuk S.; Wu, Jeong W.

1994-05-01

An electro-optic polymer guest-host system has been constructed and demonstrated. The polymer host is a polyimide (PIQ2200) and the guest chromophores are dimethyl (or diethyl) amino alkyl sulfone stilbenes. The alkylated-NLO moieties as guest chromophores have been modified, yielding new alkylated-NLO moieties. The higher content of alkylated-NLO moieties, compared to unmodified NLO moieties, was doped into a polyimide host system due to the improved solubility of new alkylated-NLO moieties. To the 40 wt%, the new alkylated- NLO moiety has been completely dissolved in the preliminary experiment, leading to the increase of refractive index by 0.0016. These polyimide-based guest-host systems exhibited a significant improvement in the thermal stability at high temperatures exceeding 250 degree(s)C. The electro-optic coefficient reported in the present study is 13 pm/V for the 40 wt% DASS-6- doped polymer system poled at the 135 V/micrometers . However, further increase up to 25 pm/V may easily be achieved by increasing the amount of guest moieties and/or the intensity of the poling field. This work presents new materials for photonic switching devices with low operating voltage.

How Non-Daily Editors Describe Status and Function of Editorial Pages.

ERIC Educational Resources Information Center

Hynds, Ernest C.; Martin, Charles H.

1979-01-01

Results of a survey of 359 editors of nondaily newspapers indicates that most nondaily editors see their editorials and editorial pages as important segments of their newspapers and believe they can use them to help influence readers, particularly on local issues. (Author/GT)

Increasing spin crossover cooperativity in 2D Hofmann-type materials with guest molecule removal

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zenere, Katrina A.; Duyker, Samuel G.; Trzop, Elzbieta

Ambient temperature spin crossover with wide hysteresis has been achieved in 2D Hofmann-type materials, where removal of guest molecules optimises ligand–ligand interactions, resulting in increased cooperativity.

Increasing spin crossover cooperativity in 2D Hofmann-type materials with guest molecule removal

DOE PAGES

Zenere, Katrina A.; Duyker, Samuel G.; Trzop, Elzbieta; ...

2018-01-01

Ambient temperature spin crossover with wide hysteresis has been achieved in 2D Hofmann-type materials, where removal of guest molecules optimises ligand–ligand interactions, resulting in increased cooperativity.

Fall Meeting by the Numbers

NASA Astrophysics Data System (ADS)

Ward, Joanna

2013-01-01

The 2012 Fall Meeting achieved many new successes, from advances in technology to presentations of exciting science. Attendance has once again grown, with more than 24,000 scientists, researchers, students, teachers, exhibitors, media, and guests convening in San Francisco to experience the week-long activities and workshops, including 6894 oral and 13,790 poster presentations, 5 general sessions, an exhibit hall with more than 270 exhibitors, more than 50 section and focus group social events and committee meetings, and 55 town hall meetings.

Towards the fluorogenic detection of peroxide explosives through host–guest chemistry

PubMed Central

Almenar, Estefanía; Costero, Ana M.; Gil, Salvador; Parra, Margarita

2018-01-01

Two dansyl-modified β-cyclodextrin derivatives (1 and 2) have been synthesized as host–guest sensory systems for the direct fluorescent detection of the peroxide explosives diacetone diperoxide (DADP) and triacetone triperoxide (TATP) in aqueous media. The sensing is based on the displacement of the dansyl moiety from the cavity of the cyclodextrin by the peroxide guest resulting in a decrease of the intensity of the fluorescence of the dye. Both systems showed similar fluorescent responses and were more sensitive towards TATP than DADP. PMID:29765646

Specification Improvement Through Analysis of Proof Structure (SITAPS): High Assurance Software Development

DTIC Science & Technology

2016-02-01

from the tools being used. For example, while Coq proves properties it does not dump an explanation of the proofs in any currently supported form. The...Distribution Unlimited 5 Hotel room locks and card keys use a simple protocol to manage the transition of rooms from one guest to the next. The lock...retains that guest key’s code. A new guest checks in and gets a card with a new current code, and the previous code set to the previous guest’s current

Tunable electrical conductivity in metal-organic framework thin film devices

DOEpatents

Talin, Albert Alec; Allendorf, Mark D.; Stavila, Vitalie; Leonard, Francois

2016-08-30

A composition including a porous metal organic framework (MOF) including an open metal site and a guest species capable of charge transfer that can coordinate with the open metal site, wherein the composition is electrically conductive. A method including infiltrating a porous metal organic framework (MOF) including an open metal site with a guest species that is capable of charge transfer; and coordinating the guest species to the open metal site to form a composition including an electrical conductivity greater than an electrical conductivity of the MOF.

Tunable electrical conductivity in metal-organic framework thin film devices

DOEpatents

Talin, Albert Alec; Allendorf, Mark D.; Stavila, Vitalie; Leonard, Francois

2016-05-24

A composition including a porous metal organic framework (MOF) including an open metal site and a guest species capable of charge transfer that can coordinate with the open metal site, wherein the composition is electrically conductive. A method including infiltrating a porous metal organic framework (MOF) including an open metal site with a guest species that is capable of charge transfer; and coordinating the guest species to the open metal site to form a composition including an electrical conductivity greater than an electrical conductivity of the MOF.

A Two-Stream Plasma Electron Microwave Source for High-Power Millimeter Wave Generation. Phase 1

DTIC Science & Technology

1989-03-29

MIT Press, Cambridge, MA, 1963). these findings that strong amplification is possible for repre- ’See, for example, G. E. Guest and D. J. Sigmar , Nucl...stringency of the stability criteria for electrostatic and whistler modes, as fl(z=O, 6, t=O) = -i/2u,(e/m) discussed by Guest and Sigmar [22], and...therein. Function. Academic Press, New York (1961). 1221 GUEST, G.E., SIGMAR , D.J., Nuci. Fusion It1(1971) [271 ABRAMOWITZ, M., STEGUN. I.A. (Eds

Corrigendum.

PubMed

2018-01-01

Marks DF (2017) Special issue on the PACE Trial. Journal of Health Psychology 22(9): 1103-1105. DOI: 10.1177/1359105317722370. In the above referenced editorial, direct quotations from editorial correspondence had been included without permission for publication on page 1104. The online version of this editorial has now been corrected to remove these quotations.

Editorializing in L2: The Case of Philippine English

ERIC Educational Resources Information Center

Dayag, Danilo T.

2004-01-01

This paper examines the discourse structure of newspaper editorials in Philippine English in terms of their macrostructure and their lexico-grammatical features. Data were taken from three leading English-language newspapers in the Philippines. Toulmin's framework is used in analyzing the macrostructure of the editorials. The study posits that the…

A Contrastive Rhetoric Analysis of English and Hindi Editorials

ERIC Educational Resources Information Center

Bolgün, M. Ali; Mangla, Asham

2017-01-01

This study explores and identifies a number of key qualitative and quantitative differences in textual discourse styles in English and Hindi editorials found in the "New York Times" ("NYT) and "Navbharat", respectively. These differences could be the source of strenuous processing of such editorials by learners of Hindi.…

The Composition of the Editorial Boards of General Marketing Journals

ERIC Educational Resources Information Center

Pan, Yue; Zhang, Jason Q.

2014-01-01

Unlike the diversity issues in corporate governance, the diversity in top academic positions (e.g., editorial boards of academic journals in business) is rather underresearched. The editorial boards of academic marketing journals are important gatekeepers and trendsetters in the creation and dissemination of marketing knowledge. Membership on…

Ethical issues in publishing in predatory journals.

PubMed

Ferris, Lorraine E; Winker, Margaret A

2017-06-15

Predatory journals, or journals that charge an article processing charge (APC) to authors, yet do not have the hallmarks of legitimate scholarly journals such as peer review and editing, Editorial Boards, editorial offices, and other editorial standards, pose a number of new ethical issues in journal publishing. This paper discusses ethical issues around predatory journals and publishing in them. These issues include misrepresentation; lack of editorial and publishing standards and practices; academic deception; research and funding wasted; lack of archived content; and undermining confidence in research literature. It is important that the scholarly community, including authors, institutions, editors, and publishers, support the legitimate scholarly research enterprise, and avoid supporting predatory journals by not publishing in them, serving as their editors or on the Editorial Boards, or permitting faculty to knowingly publish in them without consequences.

Textual analysis of tobacco editorials: how are Key media gatekeepers framing the issues?

PubMed

Smith, Katherine Clegg; Wakefield, Melanie

2005-01-01

The news media's potential to promote awareness of health issues is established, and media advocacy is now an important tool in combating tobacco use. This study examines newspaper editors' perspectives of tobacco-related issues. This study presents a textual analysis of tobacco-related editorials. The data consist of editorials on tobacco from a sample of 310 U.S. daily newspapers over the course of 1 year (2001). Data were sampled from a random one-third of the days per month, yielding 162 editorials for analysis. A qualitative textual analysis was conducted. Each editorial was coded for theme, position, and frame. We analyzed the topics gaining editorial attention and the arguments made to support various perspectives. Editorials discussed a variety of both positive and negative news events, largely conveying support for tobacco-control objectives. Various organizing frames were used-supporting policy interventions, condemning the industry, highlighting individual rights, and expressing general cynicism were most prevalent. Editors largely promoted tobacco-control efforts, particularly policy advances. There was, however, little coverage of key issues such as health effects and addiction-perhaps because they are no longer perceived to be contentious. Advocates should seek to address this area and minimize the cynicism of key media gatekeepers to avoid undermining policy and individual change efforts.

Cyclic Bis-porphyrin-Based Flexible Molecular Containers: Controlling Guest Arrangements and Supramolecular Catalysis by Tuning Cavity Size.

PubMed

Mondal, Pritam; Sarkar, Sabyasachi; Rath, Sankar Prasad

2017-05-23

Three cyclic zinc(II) bis-porphyrins (CB) with highly flexible linkers are employed as artificial molecular containers that efficiently encapsulate/coordinate various aromatic aldehydes within their cavities. Interestingly, the arrangements of guests and their reactivity inside the molecular clefts are significantly influenced by the cavity size of the cyclic containers. In the presence of polycyclic aromatic aldehydes, such as 3-formylperylene, as a guest, the cyclic bis-porphyrin host with a smaller cavity (CB1) forms a 1:1 sandwich complex. Upon slightly increasing the spacer length and thereby the cavity size, the cyclic host (CB2) encapsulates two molecules of 3-formylperylene that are also stacked together due to strong π-π interactions between them and CH-π interactions with the porphyrin rings. However, in the cyclic host (CB3) with an even larger cavity, two metal centers of the bis-porphyrin axially coordinate two molecules of 3-formylperylene within its cavity. Different arrangements of guest inside the cyclic bis-porphyrin hosts are investigated by using UV/Vis, ESI-MS, and 1 H NMR spectroscopy, along with X-ray structure determination of the host-guest complexes. Moreover, strong binding of guests within the cyclic bis-porphyrin hosts support the robust nature of the host-guest assemblies in solution. Such preferential binding of the bis-porphyrinic cavity towards aromatic aldehydes through encapsulation/coordination has been employed successfully to catalyze the Knoevenagel condensation of a series of polycyclic aldehydes with active methylene compounds (such as Meldrum's acid and 1, 3-dimethylbarbituric acid) under ambient conditions. Interestingly, the yields of the condensed products significantly increase upon increasing spacer lengths of the cyclic bis-porphyrins because more substrates can then be encapsulated within the cavity. Such controllable cavity size of the cyclic containers has profound implications for constructing highly functional and modular enzyme mimics. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

39. Photocopy of photograph (original in possession of WACC), photographer ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

39. Photocopy of photograph (original in possession of WACC), photographer unknown, c.1930's GUEST DINING ROOM WITH TABLE LAID FOR GUESTS - Faraway Ranch, Erickson-Riggs Ranch House, State Highway 181, Willcox, Cochise County, AZ

50th Anniversary Gala

NASA Image and Video Library

2011-10-15

NASA Administrator Charles Bolden (at podium) speaks to guests gathered for Stennis Space Center's 50th Anniversary Gala event Oct. 15. The event was attended by more than 300 NASA employees and guests and featured various program presentations and speakers.

Bertram Brockhouse, the Triple-axis Spectrometer, and Neutron Spectroscopy

Science.gov Websites

foreign guest scientist in the Reactor Department at Brookhaven National Laboratory [BNL]. During this and light and heavy water ... .'1 Brockhouse was again a foreign guest scientist at BNL in 1970. He

Encapsulation of a rhodamine dye within a bile acid binding protein: toward water processable functional bio host-guest materials.

PubMed

Tomaselli, Simona; Giovanella, Umberto; Pagano, Katiuscia; Leone, Giuseppe; Zanzoni, Serena; Assfalg, Michael; Meinardi, Francesco; Molinari, Henriette; Botta, Chiara; Ragona, Laura

2013-10-14

New strategies are requested for the preparation of bioinspired host-guest complexes to be employed in technologically relevant applications, as sensors and optoelectronic devices. We report here a new approach employing a single monomeric protein as host for the strongly fluorescent rhodamine dye. The selected protein, belonging to the intracellular lipid binding protein family, fully encapsulates one rhodamine molecule inside its cavity forming a host-guest complex stabilized by H and π-hydrogen bonds, a salt bridge, and favorable hydrophobic contacts, as revealed by the NMR derived structural model. The protein-dye solutions are easily processable and form homogeneous thin films exhibiting excellent photophysical and morphological properties, as derived from photoluminescence and AFM data. The obtained results represent the proof of concept of the viability of this bio host-guest system for the development of bioinspired optoelectronic devices.

Hexahomotrioxacalix[3]arene derivatives as ionophores for molecular recognition of dopamine, serotonin and phenylethylamine.

PubMed

Ni, Xin-Long; Rahman, Shofiur; Wang, Shi; Jin, Cheng-Cheng; Zeng, Xi; Hughes, David L; Redshaw, Carl; Yamato, Takehiko

2012-06-21

The lower rim functionalized hexahomotrioxacalix[3]arene derivatives cone-3 and cone-5 bearing three benzyl and three N,N-diethyl-2-aminoethoxy groups, respectively, were synthesized from triol 1. Their complexation with 2-(3,4-dihydroxyphenyl)ethylamine (dopamine), 5-hydroxytryptamine (serotonin), and 2-phenylethylamine (phenethylamine), which have biologically important activities, has been studied by (1)H-NMR spectroscopy. The chemical shifts of the aromatic protons of the host and guest molecules and the up-field shifts of the ethyl protons of the guest molecules strongly suggest the formation of inclusion complexes in solution. The formation of the host-guest complexes is assisted by a hydrogen bond and/or an electrostatic interaction between the host and ammonium ion (RNH(3)(+)) of the guest. The structures of receptors cone-3 and cone-5 have been determined by X-ray crystallography.

Bringing guest scientists to the university biology classroom via the web.

PubMed

Basiliko, Nathan; Gupta, Varun

2015-08-01

This commentary describes an initiative to bring national and international guest scientists to undergraduate and introductory graduate classrooms via web videoconferencing to facilitate interesting and effective research-informed teaching. Interactions center around both journal articles authored by the guests that are in line with weekly course lecture topics and on learning about the nature of academia in other parts of the world. Some particularly interesting perspectives from guests have come about by connecting with a journal editor-in-chief, a textbook author and with a scientist who shared a recently rejected manuscript and peer reviews. Beyond allowing students a unique behind-the-scenes look into how research questions are asked and answered, this initiative helps overcome the limited nature of a single instructor's research area to better complement the comprehensive scope of university courses. © FEMS 2015. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Computational study of the interplay between intermolecular interactions and CO2 orientations in type I hydrates.

PubMed

Pérez-Rodríguez, M; Vidal-Vidal, A; Míguez, J M; Blas, F J; Torré, J-P; Piñeiro, M M

2017-01-25

Carbon dioxide (CO 2 ) molecules show a rich orientation landscape when they are enclathrated in type I hydrates. Previous studies have described experimentally their preferential orientations, and some theoretical works have explained, but only partially, these experimental results. In the present paper, we use classical molecular dynamics and electronic density functional theory to advance in the theoretical description of CO 2 orientations within type I hydrates. Our results are fully compatible with those previously reported, both theoretical and experimental, the geometric shape of the cavities in hydrate being, and therefore, the steric constraints, responsible for some (but not all) preferential angles. In addition, our calculations also show that guest-guest interactions in neighbouring cages are a key factor to explain the remaining experimental angles. Besides the implication concerning equation of state hydrate modeling approximations, the conclusion is that these guest-guest interactions should not be neglected, contrary to the usual practice.

Trapping guests within a nanoporous metal-organic framework through pressure-induced amorphization.

PubMed

Chapman, Karena W; Sava, Dorina F; Halder, Gregory J; Chupas, Peter J; Nenoff, Tina M

2011-11-23

The release of guest species from within a nanoporous metal-organic framework (MOF) has been inhibited by amorphization of the guest-loaded framework structure under applied pressure. Thermogravimetric analyses have shown that by amorphizing ZIF-8 following sorption of molecular I(2), a hazardous radiological byproduct of nuclear energy production, the pore apertures in the framework are sufficiently distorted to kinetically trap I(2) and improve I(2) retention. Pair distribution function (PDF) analysis indicates that the local structure of the captive I(2) remains essentially unchanged upon amorphization of the framework, with the amorphization occurring under the same conditions for the vacant and guest-loaded framework. The low, accessible pressure range needed to effect this change in desorption is much lower than in tradition sorbents such as zeolites, opening the possibility for new molecular capture, interim storage, or controlled release applications.

Motion of the guest ion as precursor to the first-order phase transition in the cage system GdB6

NASA Astrophysics Data System (ADS)

Iwasa, Kazuaki; Igarashi, Ryosuke; Saito, Kotaro; Laulhé, Claire; Orihara, Toshihiko; Kunii, Satoru; Kuwahara, Keitaro; Nakao, Hironori; Murakami, Youichi; Iga, Fumitoshi; Sera, Masafumi; Tsutsui, Satoshi; Uchiyama, Hiroshi; Baron, Alfred Q. R.

2011-12-01

The motion of guest Gd ions in oversized boron cages in GdB6 was investigated from phonon spectra measurements obtained by inelastic x-ray scattering. The measured phonon modes soften by about 10% from 300 K down to TN=16 K, in particular, the longitudinal phonon for the propagation vector q1=(1/2,0,0) that characterizes the distorted structure below TN. Besides, the dispersion relation curves show kinklike anomalies at qk=(0.38,0.38,0). The observed results imply that the motion of the guest Gd ion interplays with the f electrons magnetoelastically and with carriers via Fermi surface nesting. The anomalous properties previously reported for this material far above TN originate from the strong electron-phonon coupling, which causes the motion of guest ions as precursors to the first-order phase transition.

Arts and Learning Research, 1998-1999. The Journal of the Arts and Learning Special Interest Group of the American Educational Research Association (Chicago, Illinois, April 1998).

ERIC Educational Resources Information Center

Bresler, Liora, Ed.; Ellis, Nancy C., Ed.

1999-01-01

This volume highlights thought-provoking issues in visual arts, drama, and music education presented at the 1998 meeting of the American Educational Research Association. Following a message from the Special Interest Group Chair, Larry Kantner, and an editorial, articles in section 1 are: "Art Beginnings" (L. A. Kantner); "Teachers'…

Technologies for Metabolic Monitoring Military Section Editorials in Diabetes Technologies and Therapeutics

DTIC Science & Technology

2004-12-01

monitoring, diabetes, IGF-I, patient decision assist, hyperspectral imaging, actigraphy, accelerometry, foot contact time, Con A-glucose sensing, lactate...was reduced in both con - mottling, and rebound of a skin fold could all ditions. contribute to a diagnosis. Current technologies Hyperspectral imaging...information such as ambient con - responses in the context of various external ditions, meals and recent activity, and specific challenges ("green light

17 CFR 249.618 - Form BD-Y2K, information required of broker-dealers pursuant to section 17 of the Securities...

Code of Federal Regulations, 2010 CFR

2010-04-01

... 17 Commodity and Securities Exchanges 3 2010-04-01 2010-04-01 false Form BD-Y2K, information... Exchange Members, Brokers, and Dealers § 249.618 Form BD-Y2K, information required of broker-dealers... FR 37674, July 13, 1998] Editorial Note: For Federal Register citations affecting Form BD-Y2K, see...

17 CFR 249.1200 - Form X-17F-1A-Report for missing, lost, stolen or counterfeit securities.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 17 Commodity and Securities Exchanges 4 2014-04-01 2014-04-01 false Form X-17F-1A-Report for... Reporting and Inquiry With Respect to Missing, Lost, Stolen, or Counterfeit Securities § 249.1200 Form X-17F...] Editorial Note: For Federal Register citations affecting Form X-17F-1A, see the List of CFR Sections...

17 CFR 249.1200 - Form X-17F-1A-Report for missing, lost, stolen or counterfeit securities.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 17 Commodity and Securities Exchanges 3 2011-04-01 2011-04-01 false Form X-17F-1A-Report for... Reporting and Inquiry With Respect to Missing, Lost, Stolen, or Counterfeit Securities § 249.1200 Form X-17F...] Editorial Note: For Federal Register citations affecting Form X-17F-1A, see the List of CFR Sections...

17 CFR 249.1200 - Form X-17F-1A-Report for missing, lost, stolen or counterfeit securities.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 17 Commodity and Securities Exchanges 3 2013-04-01 2013-04-01 false Form X-17F-1A-Report for... Reporting and Inquiry With Respect to Missing, Lost, Stolen, or Counterfeit Securities § 249.1200 Form X-17F...] Editorial Note: For Federal Register citations affecting Form X-17F-1A, see the List of CFR Sections...

17 CFR 249.1200 - Form X-17F-1A-Report for missing, lost, stolen or counterfeit securities.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 17 Commodity and Securities Exchanges 3 2010-04-01 2010-04-01 false Form X-17F-1A-Report for... Reporting and Inquiry With Respect to Missing, Lost, Stolen, or Counterfeit Securities § 249.1200 Form X-17F...] Editorial Note: For Federal Register citations affecting Form X-17F-1A, see the List of CFR Sections...

17 CFR 249.1200 - Form X-17F-1A-Report for missing, lost, stolen or counterfeit securities.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 17 Commodity and Securities Exchanges 3 2012-04-01 2012-04-01 false Form X-17F-1A-Report for... Reporting and Inquiry With Respect to Missing, Lost, Stolen, or Counterfeit Securities § 249.1200 Form X-17F...] Editorial Note: For Federal Register citations affecting Form X-17F-1A, see the List of CFR Sections...

A guide to writing case reports for the Journal of Medical Case Reports and BioMed Central Research Notes

PubMed Central

2013-01-01

Case reports are a time-honored, important, integral, and accepted part of the medical literature. Both the Journal of Medical Case Reports and the Case Report section of BioMed Central Research Notes are committed to case report publication, and each have different criteria. Journal of Medical Case Reports was the world’s first international, PubMed-listed medical journal devoted to publishing case reports from all clinical disciplines and was launched in 2007. The Case Report section of BioMed Central Research Notes was created and began publishing case reports in 2012. Between the two of them, thousands of peer-reviewed case reports have now been published with a worldwide audience. Authors now also have Cases Database, a continually updated, freely accessible database of thousands of medical case reports from multiple publishers. This informal editorial outlines the process and mechanics of how and when to write a case report, and provides a brief look into the editorial process behind each of these complementary journals along with the author’s anecdotes in the hope of inspiring all authors (both novice and experienced) to write and continue writing case reports of all specialties. Useful hyperlinks are embedded throughout for easy and quick reference to style guidelines for both journals. PMID:24283456

Electrostatically Driven Guest Binding in a Self-Assembled Porous Network at the Liquid/Solid Interface.

PubMed

Iritani, Kohei; Ikeda, Motoki; Yang, Anna; Tahara, Kazukuni; Anzai, Masaru; Hirose, Keiji; De Feyter, Steven; Moore, Jeffrey S; Tobe, Yoshito

2018-05-29

We present here the construction of a self-assembled two-dimensional (2D) porous monolayer bearing a highly polar 2D space to study guest co-adsorption through electrostatic interactions at the liquid/solid interface. For this purpose, a dehydrobenzo[12]annulene (DBA) derivative, DBA-TeEG, having tetraethylene glycol (TeEG) groups at the end of the three alternating alkoxy chains connected by p-phenylene linkers was synthesized. As a reference host molecule, DBA-C10, having nonpolar C 10 alkyl chains at three alternating terminals, was employed. As guest molecules, hexagonal phenylene-ethynylene macrocycles (PEMs) attached by triethylene glycol (TEG) ester and hexyl ester groups, PEM-TEG and PEM-C6, respectively, at each vertex of the macrocyclic periphery were used. Scanning tunneling microscopy observations at the 1,2,4-trichlorobenzene/highly oriented pyrolytic graphite interface revealed that PEM-TEG was immobilized in the pores formed by DBA-TeEG at higher probability because of electrostatic interactions such as dipole-dipole and hydrogen bonding interactions between oligoether units of the host and guest, in comparison to PEM-C6 with nonpolar groups. These observations are discussed based on molecular mechanics simulations to investigate the role of the polar functional groups. When a nonpolar host matrix formed by DBA-C10 was used, however, only phase separation and preferential adsorption were observed; virtually no host-guest complexation was discernible. This is ascribed to the strong affinity between the guest molecules which form by themselves densely packed van der Waals networks on the surface.

A Statistical Analysis of the PPII Propensity of Amino Acid Guests in Proline-Rich Peptides

PubMed Central

Moradi, Mahmoud; Babin, Volodymyr; Sagui, Celeste; Roland, Christopher

2011-01-01

There has been considerable debate about the intrinsic PPII propensity of amino-acid residues in denatured polypeptides. Experimentally, the propensity scale is based on the behavior of guest amino-acid residues placed in the middle of polyproline hosts. We have used classical molecular dynamics simulations, with state-of-the-art force fields to carry out a comprehensive analysis of the conformational equilibria of the proline-based host oligopeptides with single guests. The tracked structural characteristics include the PPII content, the cis/trans isomerization of the prolyl bonds, the puckering of the pyrrolidine rings of the proline residues, and the secondary structural motifs. We find no evidence for an intrinsic PPII propensity in any of the guest amino acids other than proline. Instead, the PPII content as derived from experiments may be explained in terms of: 1), a local correlation between the dihedral angles of the guest amino acid and the proline residue immediately preceding it; and 2), a nonlocal correlation between the cis/trans states of the peptide bonds. In terms of the latter, we find that the presence of a guest (other than proline, tyrosine, or tryptophan) increases the trans content of most of the prolyl bonds, which results in an effective increase of the peptide PPII content. With respect to the local dihedral correlations, we find that these are well described in terms of the so-called odds-ratio statistic. Expressed in terms of free energy language, the PPII content based on the odds-ratio of the relevant residues correlate well with the experimentally measured PPII content. PMID:21320454

EDITORIAL: 50th anniversary issue

NASA Astrophysics Data System (ADS)

Beddoe, Alun H.

2006-07-01

In July 1956, 50 years ago, the first issue of Physics in Medicine and Biology (PMB) was published. It was subtitled The Journal of the Hospital Physicists' Association and published in association with the Philosophical Magazine by Taylor and Francis. Subscriptions were £1 per part or £3 10s for an annual subscription. The Editor, Professor J E Roberts, prefaced the first issue with a cautious editorial noting: The appearance of a new journal is usually greeted with mixed feelings by scientific workers, a common response being that there are far too many journals already. Justification for a new publication is only possible if there is a clearly defined gap in the publishing facilities available to workers in a particular scientific field.... Professor Roberts ended by seeking support from the scientific community for the new venture. He certainly got it! From a tentative few hundred pages in four issues a year for the first few years, the journal is now issued twice monthly with nearly 8000 pages expected in volume 51. In this anniversary issue we have invited some 28 senior authors to submit papers on a range of subjects spanning the discipline. We decided that to be an author one had to be old, but age was not to be the only criterion! Indeed readers will recognize all names as major contributors to both the development of medical physics and the success of PMB. Authors were not asked to write formal topical reviews of the state-of-the-art of the sub-disciplines which make up medical physics, but rather to present short historical reviews, didactic in style, perhaps highlighting the role of PMB in the development of their fields. Nevertheless, other than a page limit (which many subsequently ignored!) no formal format was imposed on authors, so what follows is a range of contributions from the almost conversational, personal statement to the more formal and familiar scientific paper. Whatever the writing style we are confident that readers will gain some appreciation of the development of our wide-ranging discipline over the last half century. Some readers may feel that one or two subjects have not been represented, and for that I can only apologise. We did ask for contributions to several other topics (for example radiation metrology and optical techniques) but inevitably there were authors who for various reasons were unable to meet the deadline. Inevitably we will also have missed contributions from excellent potential authors (who satisfied the age criterion!). As Guest Editor I must bear the responsibility for those omissions. While page limits do not permit me to discuss the contributions to this issue individually I would like to mention the first contribution by Dr J E (Bob) Burns. Dr Burns was on the Editorial Board in the early sixties working with the second Editor, Professor Sir Joseph Rotblat. Both in his article and in personal communications Dr Burns has emphasized the important role of Professor Rotblat in the early years. I did write to Professor Rotblat seeking a contribution from him but, sadly, received a reply saying that he was not well enough to contribute `at present'; he died a few weeks later at the age of 96 years (please refer to www.pugwash.org for tributes from Mikhail Gorbachev, Kofi Annan and many others). Dr Burns wrote a short note to me shortly after his death including the following comment which is reproduced below: Although many people have contributed to the success of PMB over the last 50 years it was Rotblat's restless energy, power of persuasion and already existing fame (he was well known both scientifically and to the public at the time) that enabled him to rescue the journal from an early death. After discussions with colleagues around the UK, including Dr Burns, and with the Editorial Board, we all felt that it would be highly appropriate to dedicate this anniversary issue to the memory of Professor Rotblat. Institute of Physics Publishing (IOP) took over the publishing of PMB in 1972, firstly on behalf of the Hospital Physicists' Association and then on behalf of the Institute of Physics and Engineering in Medicine (IPEM). I wish to pay tribute to the staff at the IOP Publishing Office for the continuing excellent quality and short publication times for articles appearing in PMB. There can be no doubt that this contributes to the popularity with authors and readers alike. It almost goes without saying but I should also thank all the contributors, referees, Editorial Board members and International Advisory Board members who have, collectively, made PMB the success that it is. For historical interest I list below the 11 editors of PMB since its inception. Three of these editors have contributed papers to this issue. 1956-1961 Professor J E Roberts, Middlesex Hospital, London 1961-1972 Professor Sir Joseph Rotblat, St Bartholomew's Hospital, London 1973-1978 Professor H A B Simons, Royal Free Hospital, London 1979-1982 Mr J Clifton, University College Hospital, London 1983-1985 Professor R P Parker, University of Leeds, Leeds 1986-1987 Dr M J Day, Newcastle General Hospital, Newcastle 1988-1991 Professor S C Lillicrap, Royal United Hospital, Bath 1992-1995 Professor B L Diffey, Dryburn Hospital, Durham 1996-1999 Professor M O Leach, Royal Marsden NHS Foundation Trust, London 2000-2005 Professor A H Beddoe, University Hospital, Birmingham 2006- Professor S Webb, Royal Marsden NHS Foundation Trust, London Finally, apart from noting the usual caveat that the Guest Editor, Editor-in Chief, IOP and IPEM take no responsibility for opinions expressed by authors, I would like to conclude by wishing Professor Steve Webb and future editors every success. While I may not be around for the centenary issue in July 2056 I have every reason to believe that it will be a good one.

Arguing in L2: Discourse Structure and Textual Metadiscourse in Philippine Newspaper Editorials

ERIC Educational Resources Information Center

Tarrayo, Veronico N.; Duque, Marie Claire T.

2011-01-01

This study described the discourse structure and textual metadiscourse in newspaper editorials in the Philippines where English is used as a second language or L2. Specifically, it sought answers to the following questions: (1) What discourse features characterize the structure of the following parts of Philippine newspaper editorials--orientation…

Dogmatism, Intelligence, and the Understanding/Appreciation of Editorial Satire.

ERIC Educational Resources Information Center

Gruner, Charles R.

In a study of satire as persuasion, two experiments were conducted--one to determine whether dogmatism affected the understanding and appreciation of editorial satire, the second to determine the same about intelligence as measured by the Scholastic Aptitude Test. In the first experiment, 116 college students read three satirical editorials. After…

Editorial: Progress and prospects

Treesearch

Paul H. Gobster; Wei-Ning Xiang

2012-01-01

A year has passed since the new leadership of this journal was officially introduced in an editorial for the Special Issue commemorating our 100th volume of publication. That editorial and several of the contributed essays to the Special Issue offered ideas for strengthening the journal and clarifying its mission for moving forward. These ideas have since been...

By-Laws | Center for Cancer Research

Cancer.gov

The NIH Fellows Editorial Board (FEB) offers a free and confidential editorial service for NIH fellows. The Board members edit manuscripts, abstracts, book chapters, clinical protocols, and grant submissions and offer suggestions for grammar, structure, and style, but not for scientific content. The Board provides valuable training and editorial experience to its members for

Guest Molecule Exchange Kinetics for the 2012 Ignik Sikumi Gas Hydrate Field Trial

DOE Office of Scientific and Technical Information (OSTI.GOV)

White, Mark D.; Lee, Won Suk

A commercially viable technology for producing methane from natural gas hydrate reservoirs remains elusive. Short-term depressurization field tests have demonstrated the potential for producing natural gas via dissociation of the clathrate structure, but the long-term performance of the depressurization technology ultimately requires a heat source to sustain the dissociation. A decade of laboratory experiments and theoretical studies have demonstrated the exchange of pure CO2 and N2-CO2 mixtures with CH4 in sI gas hydrates, yielding critical information about molecular mechanisms, recoveries, and exchange kinetics. Findings indicated the potential for producing natural gas with little to no production of water and rapidmore » exchange kinetics, generating sufficient interest in the guest-molecule exchange technology for a field test. In 2012 the U.S. DOE/NETL, ConocoPhillips Company, and Japan Oil, Gas and Metals National Corporation jointly sponsored the first field trial of injecting a mixture of N2-CO2 into a CH4-hydrate bearing formation beneath the permafrost on the Alaska North Slope. Known as the Ignik Sikumi #1 Gas Hydrate Field Trial, this experiment involved three stages: 1) the injection of a N2-CO2 mixture into a targeted hydrate-bearing layer, 2) a 4-day pressurized soaking period, and 3) a sustained depressurization and fluid production period. Data collected during the three stages of the field trial were made available after an extensive quality check. These data included continuous temperature and pressure logs, injected and recovered fluid compositions and volumes. The Ignik Sikumi #1 data set is extensive, but contains no direct evidence of the guest-molecule exchange process. This investigation is directed at using numerical simulation to provide an interpretation of the collected data. A numerical simulator, STOMP-HYDT-KE, was recently completed that solves conservation equations for energy, water, mobile fluid guest molecules, and hydrate guest molecules, for up to three gas hydrate guest molecules: CH4, CO2, and N2. The independent tracking of mobile fluid and hydrate guest molecules allows for the kinetic exchange of guest molecules between the mobile fluids and hydrate. The particular interest of this numerical investigation is to determine whether kinetic exchange parameters, determined from laboratory-scale experiments, are directly applicable to interpreting the Ignik Sikumi #1 data.« less

Editors' report, 2012.

PubMed

García-Puig, J; Alonso-Vega, G Gaspar; Ríos-Blanco, J J

2013-01-01

The editors of Revista Clínica Española (Rev Clin Esp) inform on their editorial activity during the last 12 months: a) objectives and attainments; b) editorial activity; and c) objectives for 2013. In 2012 the most relevant modifications concerning the editorial activity have been: a) revision by the responsible editor of all manuscripts sent to peer review, and b) translation into English of five manuscripts with abstract of each issue. From the first January to the 30th September 2012 we handled 457 manuscripts (50 manuscripts per month) a figure 22.5% higher than in 2011 (40.8 manuscripts per month). We have accepted 27.2% of all manuscripts (originals, 13.0%). We asked for 295 revisions to 241 reviewers and we have received 66.1% of the revisions asked for in less than two weeks (mean time to receive a revision, 11.3 days). The mean time to adopt an editorial decision for all manuscripts («accept»/«reject») has been 23.9 days (31.3 days in 2011; 35.4 in 2010). This figure has been 29.4 days for the original manuscripts (9.5 and 12.3 days less than in 2011 and 2010, respectively). The mean time taken since a manuscript is received to publication has dropped from 203 days in 2010, 168 in 2011 and 115 in 2012 (less than 3 months). The collaboration with the working groups has reported 19 published manuscripts in 2012. We hope that in 2013 both the English version and the digitalization of Rev Clin Esp from 1940 to 1999 (the journal is already digitalized since 2000) will become a reality. The renewal of the actual sections (i.e., clinical conference, an image for a diagnosis) pretends, with the collaboration of all, to make our journal, each day, better. Copyright © 2012 Elsevier España, S.L. All rights reserved.

Health camps in schools and content analysis of the school textbooks: A cross-sectional study in Tamil Nadu.

PubMed

Geetha Priya, P R; Asokan, Sharath; Kandaswamy, D; Malliga, S; Arthi, G

2016-01-01

School textbooks have been considered as an effective platform for promoting oral health. The information on oral health in the Indian school textbooks has not been evaluated. The aim of this study was to evaluate the contents of school textbooks on oral health and to quantitatively analyze the school health camps and guest lectures/demonstrations conducted in the schools of three districts in Tamil Nadu. Twenty schools which participated in the study followed the Central Board of Secondary Education, matriculation, or the state board syllabus. A questionnaire was designed to collect information about the medical camps, dental camps, guest lectures, and demonstrations conducted in the last academic year from the schools. The questionnaires were distributed among the school teachers of grades I-V. They were asked to provide photocopies of the topics on oral health which were included in the syllabus. Content analysis of the information on oral health-related topics in the school textbooks was done. Descriptive statistics of the details of the camps and lectures was done using Pearson's Chi-square test (SPSS version 17) (SPSS Inc. Chicago, Illinois, USA). There was no significant difference in the number of medical camps (P = 0.445), dental camps (P = 0.055), and guest lectures (P = 0.069) organized among the three boards of schools. Basic information on the parts and type of teeth, tooth decay, and brushing were present in the textbooks of all three boards of schools. The school textbooks of all the three boards contained basic and adequate information on oral health. Periodic revisions of the content and quality of information in the school textbooks are essential. To make the information sticky for long-term, reinforcements in the form of school health education is needed.

Does small equal predatory? Analysis of publication charges and transparency of editorial policies in Croatian open access journals.

PubMed

Stojanovski, Jadranka; Marušić, Ana

2017-06-15

We approach the problem of "predatory" journals and publishers from the perspective of small scientific communities and small journals that may sometimes be perceived as "predatory". Among other characteristics of "predatory" journals two most relevant are their business model and the quality of the editorial work. We analysed 444 Croatian open access (OA) journals in the Hrčak (portal of Croatian scientific journals) digital journal repository for the presence of article processing charges as a business model and the transparency of editorial policies. The majority of journals do not charge authors or require submission or article processing charges, which clearly distinguishes them from "predatory" journals. Almost all Hrčak OA journals have publicly available information on editorial boards, including full names and affiliations, and detailed contact information for the editorial office at the Hrčak website. The journal names are unique and cannot be easily confused with another journal or intend to mislead about the journal's origin. While most journals provide information on peer review process, many do not provide guidelines for reviewers or other editorial and publication ethics standards. In order to clearly differentiate themselves from predatory journals, it is not enough for journals from small research communities to operate on non-commercial bases, but also to have transparent editorial policies.

Does small equal predatory? Analysis of publication charges and transparency of editorial policies in Croatian open access journals

PubMed Central

Stojanovski, Jadranka; Marušić, Ana

2017-01-01

Introduction We approach the problem of "predatory" journals and publishers from the perspective of small scientific communities and small journals that may sometimes be perceived as "predatory". Among other characteristics of "predatory" journals two most relevant are their business model and the quality of the editorial work. Materials and methods We analysed 444 Croatian open access (OA) journals in the Hrčak (portal of Croatian scientific journals) digital journal repository for the presence of article processing charges as a business model and the transparency of editorial policies. Results The majority of journals do not charge authors or require submission or article processing charges, which clearly distinguishes them from “predatory” journals. Almost all Hrčak OA journals have publicly available information on editorial boards, including full names and affiliations, and detailed contact information for the editorial office at the Hrčak website. The journal names are unique and cannot be easily confused with another journal or intend to mislead about the journal’s origin. While most journals provide information on peer review process, many do not provide guidelines for reviewers or other editorial and publication ethics standards. Conclusion In order to clearly differentiate themselves from predatory journals, it is not enough for journals from small research communities to operate on non-commercial bases, but also to have transparent editorial policies. PMID:28694721

2018 NASA Day of Remembrance

NASA Image and Video Library

2018-01-25

Inside the Center for Space Education at the Kennedy Space Center Visitor Complex, spaceport employees and guests join others throughout NASA for the Day of Remembrance ceremony, honoring the contributions of astronauts who have perished in the conquest of space. Following the ceremony, guests walk to the Space Mirror Memorial. The names of fallen astronauts from Apollo 1, Challenger and Columbia, as well as the astronauts who perished in training and commercial airplane accidents are emblazoned on the monument. Each year spaceport employees and guests join others throughout NASA honoring the contributions of astronauts who have perished in the conquest of space.

Foale examines fresh fruit brought to Mir by the STS-86 crew

NASA Image and Video Library

1997-09-27

S86-E-5299 (27 Sept. 1997) --- Astronaut C. Michael Foale, cosmonaut guest researcher, shows his pleasure over a package of fresh fruit brought aboard Russia?s Mir Space Station by the STS-86 crew aboard the space shuttle Atlantis. This photograph captures Foale in his last hours as a cosmonaut guest researcher aboard Mir. Astronaut David A. Wolf, mission specialist, will replace Foale onboard the Mir, as cosmonaut guest researcher. This photograph was taken with the Electronic Still Camera (ESC) at 23:11:26 GMT on Sept. 27, 1997. Photo credit: NASA

Guest-Release Control in Enzyme-Sensitive, Amphiphilic-Dendrimer-Based Nanoparticles through Photochemical Crosslinking

PubMed Central

Raghupathi, Krishna R.; Azagarsamy, Malar A.; Thayumanavan, S.

2012-01-01

Stimuli sensitive, facially amphiphilic dendrimers have been synthesized and their enzyme-responsive nature has been determined with dual fluorescence responses of both covalently conjugated and non-covalently bound reporter units. These dual responses are correlated to ascertain the effect of enzymatic action on micellar aggregates and the consequential guest release. The release of the guest molecule is conveniently tuned by stabilizing the micellar aggregates through photochemical crosslinking of hydrophobic coumarin units. This photo-crosslinking is also utilized as a tool to investigate the mode of enzyme-substrate interaction in the context of aggregate-monomer equilibrium. PMID:21887830

Ab initio design of drug carriers for zoledronate guest molecule using phosphonated and sulfonated calix[4]arene and calix[4]resorcinarene host molecules

NASA Astrophysics Data System (ADS)

Jang, Yong-Man; Yu, Chol-Jun; Kim, Jin-Song; Kim, Song-Un

2018-04-01

Monomolecular drug carriers based on calix[n]-arenes and -resorcinarenes containing the interior cavity can enhance the affinity and specificity of the osteoporosis inhibitor drug zoledronate (ZOD). In this work we investigate the suitability of nine different calix[4]-arenes and -resorcinarenes based macrocycles as hosts for the ZOD guest molecule by conducting {\\it ab initio} density functional theory calculations for structures and energetics of eighteen different host-guest complexes. For the optimized molecular structures of the free, phosphonated, sulfonated calix[4]-arenes and -resorcinarenes, the geometric sizes of their interior cavities are measured and compared with those of the host-guest complexes in order to check the appropriateness for host-guest complex formation. Our calculations of binding energies indicate that in gaseous states some of the complexes might be unstable but in aqueous states almost all of the complexes can be formed spontaneously. Of the two different docking ways, the insertion of ZOD with the \\ce{P-C-P} branch into the cavity of host is easier than that with the nitrogen containing heterocycle of ZOD. The work will open a way for developing effective drug delivering systems for the ZOD drug and promote experimentalists to synthesize them.

Computer-science guest-lecture series at Langston University sponsored by the U.S. Geological Survey; abstracts, 1992-93

USGS Publications Warehouse

Steele, K. S.

1994-01-01

Langston University, a Historically Black University located at Langston, Oklahoma, has a computing and information science program within the Langston University Division of Business. Since 1984, Langston University has participated in the Historically Black College and University program of the U.S. Department of Interior, which provided education, training, and funding through a combined earth-science and computer-technology cooperative program with the U.S. Geological Survey (USGS). USGS personnel have presented guest lectures at Langston University since 1984. Students have been enthusiastic about the lectures, and as a result of this program, 13 Langston University students have been hired by the USGS on a part-time basis while they continued their education at the University. The USGS expanded the offering of guest lectures in 1992 by increasing the number of visits to Langston University, and by inviting participation of speakers from throughout the country. The objectives of the guest-lecture series are to assist Langston University in offering state-of-the-art education in the computer sciences, to provide students with an opportunity to learn from and interact with skilled computer-science professionals, and to develop a pool of potential future employees for part-time and full-time employment. This report includes abstracts for guest-lecture presentations during 1992-93 school year.

Interview with Amr H Sawalha: epigenetics and autoimmunity.

PubMed

Sawalha, Amr H

2017-04-01

Amr H Sawalha is Professor of Internal Medicine and Marvin and Betty Danto Research Professor of Connective Tissue Research at the University of Michigan, Department of Internal Medicine, Division of Rheumatology. He also holds faculty appointments at the Center for Computational Medicine and Bioinformatics and the Graduate Program in Immunology at the University of Michigan. He was recently appointed as Guest Professor at Central South University in Changsha, China. He received his medical degree from Jordan University of Science and Technology and completed his residency training in internal medicine at the University of Oklahoma Health Sciences Center, and his fellowship in rheumatology at the University of Michigan. His research focus is the genetics and epigenetics of complex autoimmune and inflammatory diseases, including lupus and systemic vasculitis. He has authored over 100 peer-reviewed manuscripts, book chapters and review articles, and is on the editorial board of several journals in his field. He has been elected as a member of the American Society for Clinical Investigation, and has received numerous awards, including the Edmund L Dubois, MD, Memorial Lectureship Award from the American College of Rheumatology in recognition for his work in lupus. He is Chair of the Lupus Foundation of America research subcommittee and is a member of the Vasculitis Foundation Medical and Scientific Advisory Board. He also provides clinical care and teaching in the rheumatology outpatient and inpatient services, and he is the director of the NIH-funded rheumatology training grant at the University of Michigan.

Guest Editorial High Performance Computing (HPC) Applications for a More Resilient and Efficient Power Grid

DOE Office of Scientific and Technical Information (OSTI.GOV)

Huang, Zhenyu Henry; Tate, Zeb; Abhyankar, Shrirang

The power grid has been evolving over the last 120 years, but it is seeing more changes in this decade and next than it has seen over the past century. In particular, the widespread deployment of intermittent renewable generation, smart loads and devices, hierarchical and distributed control technologies, phasor measurement units, energy storage, and widespread usage of electric vehicles will require fundamental changes in methods and tools for the operation and planning of the power grid. The resulting new dynamic and stochastic behaviors will demand the inclusion of more complexity in modeling the power grid. Solving such complex models inmore » the traditional computing environment will be a major challenge. Along with the increasing complexity of power system models, the increasing complexity of smart grid data further adds to the prevailing challenges. In this environment, the myriad of smart sensors and meters in the power grid increase by multiple orders of magnitude, so do the volume and speed of the data. The information infrastructure will need to drastically change to support the exchange of enormous amounts of data as smart grid applications will need the capability to collect, assimilate, analyze and process the data, to meet real-time grid functions. High performance computing (HPC) holds the promise to enhance these functions, but it is a great resource that has not been fully explored and adopted for the power grid domain.« less

Gender Trends in Radiology Authorship: A 35-Year Analysis.

PubMed

Piper, Crystal L; Scheel, John R; Lee, Christoph I; Forman, Howard P

2016-01-01

The purpose of this study was to describe trends over time in female authorship in the radiology literature and to investigate the tendency of female first authors to publish with female senior authors. Data on the gender of academic physician authors based in the United States for all major articles published in three general radiology journals--Radiology, AJR, and Academic Radiology--were collected and analyzed for the years 1978, 1988, 1998, 2008, and 2013. Multivariate logistic regression was used to identify significant trends over time, and a chi-square test of independence was performed to determine significant relations between the genders of first and senior authors. The gender of 4182 of 4217 (99.17%) authors with MD degrees was determined. The proportion of original research articles published by women as first authors increased from 8.33% in 1978 to 32.35% in 2013 (p < 0.001). The proportion of original research articles with women as senior authors increased from 6.75% in 1978 to 21.90% in 2013 (p < 0.001). Female first and senior authorship increased significantly over time (first author, p < 0.001; senior author, p < 0.001). There was a statistically significant relation between the genders of first and senior authors of original research articles and guest editorials (p < 0.001). Over 35 years, there was a statistically significant upward linear trend of female physician participation in authorship of academic radiology literature. Female first authors were more likely to publish with female senior authors.

By-Laws | Center for Cancer Research

Cancer.gov

The NIH Fellows Editorial Board (FEB) offers a free and confidential editorial service for NIH fellows. The Board members edit manuscripts, abstracts, book chapters, clinical protocols, and grant submissions and offer suggestions for grammar, structure, and style, but not for scientific content. The Board provides valuable training and editorial experience to its members for academic as well as nonacademic scientific careers.

Philosophic Thinking in Social Work: An Analysis of 30 Years of "Social Work" Editorials

ERIC Educational Resources Information Center

Martinez-Brawley, Emilia E.; Zorita, Paz M-B

2016-01-01

This article looks at 30 years of editorial perspectives and trends in social work as a profession through the analysis of editorials from the journal "Social Work." It identifies the wax and wane of philosophic (intellectual or scholarly) questions in social work thinking in the past three decades. It defines what philosophic thinking…

Out with the old [Editorial

Treesearch

Michael L. Morrison; William M. Block

2007-01-01

In this, our last editorial as Editors-in-Chief (EICs) of the Journal of Wildlife Management (JWM), we want to outline how this journal has changed in the past few years, make a few comments on our editorial philosophy and what we hope we accomplished, and make a recommendation for expanding the publishing opportunities in The Wildlife Society (TWS).

Bioethics and its gatekeepers: does institutional racism exist in leading bioethics journals?

PubMed

Chattopadhyay, Subrata; Myser, Catherine; De Vries, Raymond

2013-03-01

Who are the gatekeepers in bioethics? Does editorial bias or institutional racism exist in leading bioethics journals? We analyzed the composition of the editorial boards of 14 leading bioethics journals by country. Categorizing these countries according to their Human Development Index (HDI), we discovered that approximately 95 percent of editorial board members are based in (very) high-HDI countries, less than 4 percent are from medium-HDI countries, and fewer than 1.5 percent are from low-HDI countries. Eight out of 14 leading bioethics journals have no editorial board members from a medium- or low-HDI country. Eleven bioethics journals have no board members from low-HDI countries. This severe underrepresentation of bioethics scholars from developing countries on editorial boards suggests that bioethics may be affected by institutional racism, raising significant questions about the ethics of bioethics in a global context.

Framing the challenge of climate change in Nature and Science editorials

NASA Astrophysics Data System (ADS)

Hulme, Mike; Obermeister, Noam; Randalls, Samuel; Borie, Maud

2018-06-01

Through their editorializing practices, leading international science journals such as Nature and Science interpret the changing roles of science in society and exert considerable influence on scientific priorities and practices. Here we examine nearly 500 editorials published in these two journals between 1966 and 2016 that deal with climate change, thereby constructing a lens through which to view the changing engagement of science and scientists with the issue. A systematic longitudinal frame analysis reveals broad similarities between Nature and Science in the waxing and waning of editorializing attention given to the topic, but, although both journals have diversified how they frame the challenges of climate change, they have done so in different ways. We attribute these differences to three influences: the different political and epistemic cultures into which they publish; their different institutional histories; and their different editors and editorial authorship practices.

Louisa May Alcott's Orchard House

Science.gov Websites

and Her Father! Buy the book from Orchard House Read more about John Matteson's award here Louisa May comments about this site, click to use our Online Guest Book All archival photographs © Louisa May Online Guest Book

EDITORIAL: Breeding new science by coupling photons with `nano'

NASA Astrophysics Data System (ADS)

Zheludev, Nikolay; Stockman, Mark; Zayats, Anatoly

2006-04-01

The new field of `nanophotonics' is concerned with the generation, transport, routing and detection of light in sub-wavelength structures. There is nothing new in the desire to use small structures to control waves that are much bigger than the structures, and the science of acoustics has been dealing with this problem since the early days of musical instruments. What makes nanophotonics so special is that it claims for optics the unexplored playfield of dimensions between those of objects the human eye can see with a lens, and those of the invisible elementary building blocks of the material world, molecules and atoms. Nanophotonics is a synthetic discipline that breaks into the fields of electrodynamics, solid state physics and laser physics. In growing from these disciplines it takes ideas from them, for instance from solid state physics by drawing analogies between electrons in crystals and photons in nanostructures, and from laser physics and traditional nonlinear optics by achieving strong fields not through an increase in optical power, but through its concentration. From an engineering perspective, nanophotonics promises to develop optical functionality on the smallest possible size scale (thus allowing for ultra-high-density integration), at the lowest possible energy level (thus allowing for single photon all-optical devices), and on the shortest possible timescale (thus allowing for optical devices operating within a single period of an optical wave). In this special issue we are, however, concerned with the fundamental aspects of nanophotonics, i.e. the physics that underpins these new, mind-boggling nanophotonic applications. This special issue opens with 4 articles derived from lectures at the Summer School Photonic Metamaterials: from Micro to Nanoscale, Erice, Italy, 1 7 August 2005. These reviews establish the hierarchy of nanophotonic structures and relevant length scales, explore wave interactions in nanostructured media, and examine nanophotonic functionalities underpinned by electronic excitations and structural transformations in nanoparticles. The main body of this special issue is a highly representative cross-section of research in the discipline, with papers covering essential issues in plasmonics, nanoparticle photonics, optical properties of nanostructured surfaces, atom manipulation on nanostructures, nonlinear interactions and Raman scattering from nanostructures, enhanced transmission through nano-perforated films, linear and nonlinear effects of planar chirality, energy transfer on the nanoscale, subwavelength spatial imaging, control of spontaneous emission and lasing in nanostructures and micro-resonators, nanophotonic sensors, nanostructured meta-materials, and novel nano-fabrication techniques. As the Guest Editors of this special issue, we are deeply grateful to all contributing authors for their efforts and their willingness to share recent results within the framework of what promises to be a treasured collection of papers in the field of nanophotonics. We are particularly proud that the authorship includes both pioneers and newcomers to this intriguing and fertile field of research. The Guest Editors would like to acknowledge the collaboration and support of Diederik Wiersma and Concita Sibilia, the directors of the Summer School Photonic Metamaterials: from Micro to Nanoscale, Erice, Italy, 1 7 August 2005, which provided review papers for this special issue. We are also grateful to the PHOREMOST, METAMORPHOSE and Plasmo-nano-devices European Networks of Excellence for promoting the idea of this special issue.

CALL FOR PAPERS: Special Issue on `Geometric Numerical Integration of Differential Equations'

NASA Astrophysics Data System (ADS)

Quispel, G. R. W.; McLachlan, R. I.

2005-02-01

This is a call for contributions to a special issue of Journal of Physics A: Mathematical and General entitled `Geometric Numerical Integration of Differential Equations'. This issue should be a repository for high quality original work. We are interested in having the topic interpreted broadly, that is, to include contributions dealing with symplectic or multisymplectic integration; volume-preserving integration; symmetry-preserving integration; integrators that preserve first integrals, Lyapunov functions, or dissipation; exponential integrators; integrators for highly oscillatory systems; Lie-group integrators, etc. Papers on geometric integration of both ODEs and PDEs will be considered, as well as application to molecular-scale integration, celestial mechanics, particle accelerators, fluid flows, population models, epidemiological models and/or any other areas of science. We believe that this issue is timely, and hope that it will stimulate further development of this new and exciting field. The Editorial Board has invited G R W Quispel and R I McLachlan to serve as Guest Editors for the special issue. Their criteria for acceptance of contributions are the following: • The subject of the paper should relate to geometric numerical integration in the sense described above. • Contributions will be refereed and processed according to the usual procedure of the journal. • Papers should be original; reviews of a work published elsewhere will not be accepted. The guidelines for the preparation of contributions are as follows: • The DEADLINE for submission of contributions is 1 September 2005. This deadline will allow the special issue to appear in late 2005 or early 2006. • There is a strict page limit of 16 printed pages (approximately 9600 words) per contribution. For papers exceeding this limit, the Guest Editors reserve the right to request a reduction in length. Further advice on publishing your work in Journal of Physics A: Mathematical and General may be found at www.iop.org/Journals/jphysa. • Contributions to the special issue should if possible be submitted electronically by web upload at {www.iop.org/Journals/jphysa or by e-mail to jphysa@iop.org, quoting `JPhysA Special Issue—Geometric Integration'. Submissions should ideally be in standard LaTeX form; we are, however, able to accept most formats including Microsoft Word. Please see the web site for further information on electronic submissions. • Authors unable to submit electronically may send hard copy contributions to: Publishing Administrators, Journal of Physics A, Institute of Physics Publishing, Dirac House, Temple Back, Bristol BS1 6BE, UK, enclosing the electronic code on floppy disk if available and quoting `JPhysA Special Issue—Geometric Integration'. • All contributions should be accompanied by a read-me file or covering letter giving the postal and e-mail addresses for correspondence. The Publishing Office should be notified of any subsequent change of address. This special issue will be published in the paper and online version of the journal. The corresponding author of each contribution will receive a complimentary copy of the issue. G R W Quispel and R I McLachlan Guest Editors

17 CFR Appendix C to Part 30 - Foreign Petitioners Granted Relief From the Application of Certain of the Part 30 Rules Pursuant...

Code of Federal Regulations, 2011 CFR

2011-04-01

... Relief From the Application of Certain of the Part 30 Rules Pursuant to § 30.10 C Appendix C to Part 30... TRANSACTIONS Pt. 30, App. C Appendix C to Part 30—Foreign Petitioners Granted Relief From the Application of...] Editorial Note: For Federal Register citations affecting appendix C to part 30, see the List of CFR Sections...

17 CFR Appendix C to Part 30 - Foreign Petitioners Granted Relief From the Application of Certain of the Part 30 Rules Pursuant...

Code of Federal Regulations, 2014 CFR

2014-04-01

... Relief From the Application of Certain of the Part 30 Rules Pursuant to § 30.10 C Appendix C to Part 30... TRANSACTIONS Pt. 30, App. C Appendix C to Part 30—Foreign Petitioners Granted Relief From the Application of...] Editorial Note: For Federal Register citations affecting appendix C to part 30, see the List of CFR Sections...

Contrasting guest binding interaction of cucurbit[7-8]urils with neutral red dye: controlled exchange of multiple guests.

PubMed

Shaikh, Mhejabeen; Choudhury, Sharmistha Dutta; Mohanty, Jyotirmayee; Bhasikuttan, Achikanath C; Pal, Haridas

2010-07-14

Interactions among macrocyclic hosts and dyes/drugs have been explored extensively for their direct usage in controlled uptake and release of large number of potential drug molecules. In this paper we report the non-covalent interaction of cucurbit[8]uril macrocycle (CB8) with a biologically important dye, neutral red, by absorption and fluorescence spectroscopy. A comparative analysis with the complexation behaviour of the dye with CB7, the lower homologue of CB8, indicates contrasting guest binding behaviour with significant changes in the photophysical characteristics of the dye. While CB7 interaction leads to a 1 ratio 1 stoichiometry resulting in approximately 6 fold enhancement in the fluorescence emission of the dye, CB8 displays signatures for a 1 ratio 2 host-guest stoichiometry with drastic reduction in the fluorescence emission. Apart from the evaluation of approximately 2 unit shift in the protolytic equilibrium on complexation (pK(a) shift), the measurements with tryptophan established a selective guest exchange to favour a co-localized dimer inside the CB8 cavity. In a protein medium (BSA), the 1 ratio 2 complex was converted to a 1 ratio 1 ratio 1 CB8-NRH(+)-BSA complex. The finding that NRH(+) can be transferred from CB8 to BSA, even though the binding constant for NRH(+)-CB8 is much higher than NRH(+)-BSA, is projected for a controlled slow release of NRH(+) towards BSA. Since the release and activity of drugs can be controlled by regulating the protolytic equilibrium, the macromolecular encapsulation and release of NRH(+) demonstrated here provide information relevant to host-guest based drug delivery systems and its applications.

Understanding decomposition and encapsulation energies of structure I and II clathrate hydrates

NASA Astrophysics Data System (ADS)

Alavi, Saman; Ohmura, Ryo

2016-10-01

When compressed with water or ice under high pressure and low temperature conditions, some gases form solid gas hydrate inclusion compounds which have higher melting points than ice under those pressures. In this work, we study the balance of the guest-water and water-water interaction energies that lead to the formation of the clathrate hydrate phases. In particular, molecular dynamics simulations with accurate water potentials are used to study the energetics of the formation of structure I (sI) and II (sII) clathrate hydrates of methane, ethane, and propane. The dissociation enthalpy of the clathrate hydrate phases, the encapsulation enthalpy of methane, ethane, and propane guests in the corresponding phases, and the average bonding enthalpy of water molecules are calculated and compared with accurate calorimetric measurements and previous classical and quantum mechanical calculations, when available. The encapsulation energies of methane, ethane, and propane guests stabilize the small and large sI and sII hydrate cages, with the larger molecules giving larger encapsulation energies. The average water-water interactions are weakened in the sI and sII phases compared to ice. The relative magnitudes of the van der Waals potential energy in ice and the hydrate phases are similar, but in the ice phase, the electrostatic interactions are stronger. The stabilizing guest-water "hydrophobic" interactions compensate for the weaker water-water interactions and stabilize the hydrate phases. A number of common assumptions regarding the guest-cage water interactions are used in the van der Waals-Platteeuw statistical mechanical theory to predict the clathrate hydrate phase stability under different pressure-temperature conditions. The present calculations show that some of these assumptions may not accurately reflect the physical nature of the interactions between guest molecules and the lattice waters.

A statistical analysis of the PPII propensity of amino acid guests in proline-rich peptides.

PubMed

Moradi, Mahmoud; Babin, Volodymyr; Sagui, Celeste; Roland, Christopher

2011-02-16

There has been considerable debate about the intrinsic PPII propensity of amino-acid residues in denatured polypeptides. Experimentally, the propensity scale is based on the behavior of guest amino-acid residues placed in the middle of polyproline hosts. We have used classical molecular dynamics simulations, with state-of-the-art force fields to carry out a comprehensive analysis of the conformational equilibria of the proline-based host oligopeptides with single guests. The tracked structural characteristics include the PPII content, the cis/trans isomerization of the prolyl bonds, the puckering of the pyrrolidine rings of the proline residues, and the secondary structural motifs. We find no evidence for an intrinsic PPII propensity in any of the guest amino acids other than proline. Instead, the PPII content as derived from experiments may be explained in terms of: 1), a local correlation between the dihedral angles of the guest amino acid and the proline residue immediately preceding it; and 2), a nonlocal correlation between the cis/trans states of the peptide bonds. In terms of the latter, we find that the presence of a guest (other than proline, tyrosine, or tryptophan) increases the trans content of most of the prolyl bonds, which results in an effective increase of the peptide PPII content. With respect to the local dihedral correlations, we find that these are well described in terms of the so-called odds-ratio statistic. Expressed in terms of free energy language, the PPII content based on the odds-ratio of the relevant residues correlate well with the experimentally measured PPII content. Copyright © 2011 Biophysical Society. Published by Elsevier Inc. All rights reserved.

Understanding decomposition and encapsulation energies of structure I and II clathrate hydrates.

PubMed

Alavi, Saman; Ohmura, Ryo

2016-10-21

When compressed with water or ice under high pressure and low temperature conditions, some gases form solid gas hydrate inclusion compounds which have higher melting points than ice under those pressures. In this work, we study the balance of the guest-water and water-water interaction energies that lead to the formation of the clathrate hydrate phases. In particular, molecular dynamics simulations with accurate water potentials are used to study the energetics of the formation of structure I (sI) and II (sII) clathrate hydrates of methane, ethane, and propane. The dissociation enthalpy of the clathrate hydrate phases, the encapsulation enthalpy of methane, ethane, and propane guests in the corresponding phases, and the average bonding enthalpy of water molecules are calculated and compared with accurate calorimetric measurements and previous classical and quantum mechanical calculations, when available. The encapsulation energies of methane, ethane, and propane guests stabilize the small and large sI and sII hydrate cages, with the larger molecules giving larger encapsulation energies. The average water-water interactions are weakened in the sI and sII phases compared to ice. The relative magnitudes of the van der Waals potential energy in ice and the hydrate phases are similar, but in the ice phase, the electrostatic interactions are stronger. The stabilizing guest-water "hydrophobic" interactions compensate for the weaker water-water interactions and stabilize the hydrate phases. A number of common assumptions regarding the guest-cage water interactions are used in the van der Waals-Platteeuw statistical mechanical theory to predict the clathrate hydrate phase stability under different pressure-temperature conditions. The present calculations show that some of these assumptions may not accurately reflect the physical nature of the interactions between guest molecules and the lattice waters.

Dogmatism: A Factor in the Understanding and Appreciation of Editorial Satire?

ERIC Educational Resources Information Center

Gruner, Charles R.

In order to test the hypothesis that dogmatism is related to the understanding and appreciation of editorial satires, 116 University of Georgia speech students read and reacted to three editorial satires (two by Art Hoppe and one by Art Buchwald) arranged in booklets in three different orders. Students were asked to choose from a list of five…

Agenda Diversity: A Comparison of American and Filipino Editorials on the 1986 Filipino Election and Revolution.

ERIC Educational Resources Information Center

Culbertson, Hugh M.

Editorials in four prestigious American papers and two Filipino dailies addressing the 1986 election and revolution in the Philippines were compared for differences. Four hypotheses were tested: (1) that in treatment of the Philippines, editorials in the U.S. national prestige press would place more emphasis than do those in the Filipino…

A Thematic Analysis of Edwin L. Godkin's Editorials in the "Nation," 1865-1899.

ERIC Educational Resources Information Center

Lee, Richard W.

This thematic analysis of Edward L. Godkin's editorials appearing in the "Nation" seeks to reveal the major themes on which he wrote and then, by quantitative analysis, to provide some order to the themes and to study the interaction of the themes. Five hundred and twelve editorials, written over a period of 35 years and representing…

What's Wrong with News-Editorial (Print) Journalism? Students Reject It as a Curriculum or Career Path and State Their Reasons.

ERIC Educational Resources Information Center

Mann, Raleigh C.; And Others

The ratio of journalism students choosing advertising to those choosing a news-editorial emphasis has risen dramatically in the 1980s. To determine whether students are rejecting the news-editorial curriculum based on their beliefs that occupations in this field offer low salaries, poor working conditions, and less creative opportunity than…

"Vogue," 1892-1928: An Historical Look at the Evolution of One Magazine's Editorial-Advertising-Design Mix.

ERIC Educational Resources Information Center

Prior, Marcia R.

The careful integration of editorial content, graphic design, and advertising to create a successful magazine package is not a phenomenon of the last half of the twentieth century. As early as the 1890s, the first publishers of "Vogue" magazine had established an editorial-advertising-design mix in the fashion magazine that was…

Women are underrepresented on the editorial boards of journals in environmental biology and natural resource management

PubMed Central

Cho, Alyssa H.; Johnson, Shelly A.; Schuman, Carrie E.; Adler, Jennifer M.; Gonzalez, Oscar; Graves, Sarah J.; Huebner, Jana R.; Marchant, D. Blaine; Rifai, Sami W.; Skinner, Irina

2014-01-01

Despite women earning similar numbers of graduate degrees as men in STEM disciplines, they are underrepresented in upper level positions in both academia and industry. Editorial board memberships are an important example of such positions; membership is both a professional honor in recognition of achievement and an opportunity for professional advancement. We surveyed 10 highly regarded journals in environmental biology, natural resource management, and plant sciences to quantify the number of women on their editorial boards and in positions of editorial leadership (i.e., Associate Editors and Editors-in-Chief) from 1985 to 2013. We found that during this time period only 16% of subject editors were women, with more pronounced disparities in positions of editorial leadership. Although the trend was towards improvement over time, there was surprising variation between journals, including those with similar disciplinary foci. While demographic changes in academia may reduce these disparities over time, we argue journals should proactively strive for gender parity on their editorial boards. This will both increase the number of women afforded the opportunities and benefits that accompany board membership and increase the number of role models and potential mentors for early-career scientists and students. PMID:25177537

Observation of interstitial molecular hydrogen in clathrate hydrates.

PubMed

Grim, R Gary; Barnes, Brian C; Lafond, Patrick G; Kockelmann, Winfred A; Keen, David A; Soper, Alan K; Hiratsuka, Masaki; Yasuoka, Kenji; Koh, Carolyn A; Sum, Amadeu K

2014-09-26

The current knowledge and description of guest molecules within clathrate hydrates only accounts for occupancy within regular polyhedral water cages. Experimental measurements and simulations, examining the tert-butylamine + H2 + H2O hydrate system, now suggest that H2 can also be incorporated within hydrate crystal structures by occupying interstitial sites, that is, locations other than the interior of regular polyhedral water cages. Specifically, H2 is found within the shared heptagonal faces of the large (4(3)5(9)6(2)7(3)) cage and in cavities formed from the disruption of smaller (4(4)5(4)) water cages. The ability of H2 to occupy these interstitial sites and fluctuate position in the crystal lattice demonstrates the dynamic behavior of H2 in solids and reveals new insight into guest-guest and guest-host interactions in clathrate hydrates, with potential implications in increasing overall energy storage properties. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Carbohydrate-Based Host-Guest Complexation of Hydrophobic Antibiotics for the Enhancement of Antibacterial Activity.

PubMed

Jeong, Daham; Joo, Sang-Woo; Shinde, Vijay Vilas; Cho, Eunae; Jung, Seunho

2017-08-08

Host-guest complexation with various hydrophobic drugs has been used to enhance the solubility, permeability, and stability of guest drugs. Physical changes in hydrophobic drugs by complexation have been related to corresponding increases in the bioavailability of these drugs. Carbohydrates, including various derivatives of cyclodextrins, cyclosophoraoses, and some linear oligosaccharides, are generally used as host complexation agents in drug delivery systems. Many antibiotics with low bioavailability have some limitations to their clinical use due to their intrinsically poor aqueous solubility. Bioavailability enhancement is therefore an important step to achieve the desired concentration of antibiotics in the treatment of bacterial infections. Antibiotics encapsulated in a complexation-based drug delivery system will display improved antibacterial activity making it possible to reduce dosages and overcome the serious global problem of antibiotic resistance. Here, we review the present research trends in carbohydrate-based host-guest complexation of various hydrophobic antibiotics as an efficient delivery system to improve solubility, permeability, stability, and controlled release.

Deformation of porous molecular networks induced by the exchange of guests in single crystals.

PubMed

Saied, Okba; Maris, Thierry; Wuest, James D

2003-12-10

A strategy for making molecular networks that are porous and deformable is revealed by the behavior of compound 1, in which groups that form hydrogen bonds are attached to a nominally tetrahedral Si core. Compound 1 crystallizes from various carboxylic acids to produce a porous hydrogen-bonded diamondoid network, with up to 65% of the volume available for including guests. Changing the guests expands or contracts the network up to 30% in one direction, and single crystals can accommodate these exchange-induced deformations without loss of crystallinity. This resilience appears to result in part from the incorporation of flexible Si nodes in an otherwise robust network maintained by multiple hydrogen bonds. In certain cases, exchange is faster than deformation of the network, allowing the isolation of metastable structures with a new guest included in an otherwise unchanged network. Such processes can provide new materials that would be difficult or impossible to obtain in other ways.

Force-field and quantum-mechanical binding study of selected SAMPL3 host-guest complexes

NASA Astrophysics Data System (ADS)

Hamaguchi, Nobuko; Fusti-Molnar, Laszlo; Wlodek, Stanislaw

2012-05-01

A Merck molecular force field classical potential combined with Poisson-Boltzmann electrostatics (MMFF/PB) has been used to estimate the binding free energy of seven guest molecules (six tertiary amines and one primary amine) into a synthetic receptor (acyclic cucurbit[4]uril congener) and two benzimidazoles into cyclic cucurbit[7]uril (CB[7]) and cucurbit[8]uril (CB[8]) hosts. In addition, binding enthalpies for the benzimidazoles were calculated with density functional theory (DFT) using the B3LYP functional and a polarizable continuum model (PCM). Although in most cases the MMFF/PB approach returned reasonable agreements with the experiment (±2 kcal/mol), significant, much larger deviations were reported in the case of three host-guest pairs. All four binding enthalpy predictions with the DFT/PCM method suffered 70% or larger deviations from the calorimetry data. Results are discussed in terms of the molecular models used for guest-host complexation and the quality of the intermolecular potentials.

Hotel guest's $14.5 million jury verdict set aside on appeal.

PubMed

1999-08-20

A Missouri Court of Appeals judge reversed a $14.5 million judgement against [name removed] Inc., which had been held liable for the beating and sexual assault of a guest in its hotel. The guest, identified as [name removed], had requested an upgrade to a concierge room, to increase her safety, but the hotel did not fill her request. When [name removed] opened her hotel room door the next morning, an assailant attacked, beat and raped her. The assailant escaped hotel security, but was later apprehended. The initial case against [name removed] and the assailant resulted in a $22.5 million judgement for [name removed] Both parties appealed. [Name removed] prevailed in its argument that the initial trial judge misinstructed the jury, and that [name removed] was unable to show clear and convincing evidence that the hotel's willful or conscious disregard for guest safety caused the situation. However, the court ruled against [name removed] on the basis of [name removed]'s fear-of-AIDS claim, because of her exposure to the virus.

Paramagnetic NMR Investigation of Dendrimer-Based Host-Guest Interactions

PubMed Central

Wang, Fei; Shao, Naimin; Cheng, Yiyun

2013-01-01

In this study, the host-guest behavior of poly(amidoamine) (PAMAM) dendrimers bearing amine, hydroxyl, or carboxylate surface functionalities were investigated by paramagnetic NMR studies. 2,2,6,6-Tetramethylpiperidinyloxy (TEMPO) derivatives were used as paramagnetic guest molecules. The results showed that TEMPO-COOH significantly broaden the 1H NMR peaks of amine- and hydroxyl-terminated PAMAM dendrimers. In comparison, no paramagnetic relaxation enhancement (PRE) was observed between TEMPO-NH2, TEMPO-OH and the three types of PAMAM dendrimers. The PRE phenomenon observed is correlated with the encapsulation of TEMPO-COOH within dendrimer pockets. Protonation of the tertiary amine groups within PAMAM dendrimers plays an important role during this process. Interestingly, the absence of TEMPO-COOH encapsulation within carboxylate-terminated PAMAM dendrimer is observed due to the repulsion of TEMPO-COO- anion and anionic dendrimer surface. The combination of paramagnetic probes and 1H NMR linewidth analysis can be used as a powerful tool in the analysis of dendrimer-based host-guest systems. PMID:23762249

Development of Account Receivable and Payable System for Travel Bureau Company

NASA Astrophysics Data System (ADS)

Karma, I. G. M.; Susanti, J.

2018-01-01

Sales and purchases of products on credit made by travel bureau companies require serious handling because it involves a lot of money and many parties. This research aims to build information systems to handle account payables and receivables related to the purchase and sale of tour packages on credit. The methodology is object-oriented approach, by using MS. Visual Basic. Net as a programming language and MySQL as its database package. As the results are the Account Receivable information system that is used to handle accounts receivable on agents who have purchased a tour package on credit for the guests it sends, and the Account Payable information system that is used to handle company’s account payable to suppliers who provided products or services to guests who purchase tour packages. Both of these systems handle the interrelated matter of a particular guest. Therefore, if both systems are integrated with the reservation system will be able to provide income statement on the reservation of certain guests.

Tailored protein encapsulation into a DNA host using geometrically organized supramolecular interactions

PubMed Central

Sprengel, Andreas; Lill, Pascal; Stegemann, Pierre; Bravo-Rodriguez, Kenny; Schöneweiß, Elisa-C.; Merdanovic, Melisa; Gudnason, Daniel; Aznauryan, Mikayel; Gamrad, Lisa; Barcikowski, Stephan; Sanchez-Garcia, Elsa; Birkedal, Victoria; Gatsogiannis, Christos; Ehrmann, Michael; Saccà, Barbara

2017-01-01

The self-organizational properties of DNA have been used to realize synthetic hosts for protein encapsulation. However, current strategies of DNA–protein conjugation still limit true emulation of natural host–guest systems, whose formation relies on non-covalent bonds between geometrically matching interfaces. Here we report one of the largest DNA–protein complexes of semisynthetic origin held in place exclusively by spatially defined supramolecular interactions. Our approach is based on the decoration of the inner surface of a DNA origami hollow structure with multiple ligands converging to their corresponding binding sites on the protein surface with programmable symmetry and range-of-action. Our results demonstrate specific host–guest recognition in a 1:1 stoichiometry and selectivity for the guest whose size guarantees sufficient molecular diffusion preserving short intermolecular distances. DNA nanocontainers can be thus rationally designed to trap single guest molecules in their native form, mimicking natural strategies of molecular recognition and anticipating a new method of protein caging. PMID:28205515

Metal-organic frameworks for thermoelectric energy-conversion applications

DOE PAGES

Talin, Albert Alec; Jones, Reese E.; Hopkins, Patrick E.

2016-11-07

Motivated by low cost, low toxicity, mechanical flexibility, and conformability over complex shapes, organic semiconductors are currently being actively investigated as thermoelectric (TE) materials to replace the costly, brittle, and non-eco-friendly inorganic TEs for near-ambient-temperature applications. Metal–organic frameworks (MOFs) share many of the attractive features of organic polymers, including solution processability and low thermal conductivity. A potential advantage of MOFs and MOFs with guest molecules (Guest@MOFs) is their synthetic and structural versatility, which allows both the electronic and geometric structure to be tuned through the choice of metal, ligand, and guest molecules. This could solve the long-standing challenge of findingmore » stable, high-TE-performance n-type organic semiconductors, as well as promote high charge mobility via the long-range crystalline order inherent in these materials. In this paper, we review recent advances in the synthesis of MOF and Guest@MOF TEs and discuss how the Seebeck coefficient, electrical conductivity, and thermal conductivity could be tuned to further optimize TE performance.« less

Tailored protein encapsulation into a DNA host using geometrically organized supramolecular interactions

NASA Astrophysics Data System (ADS)

Sprengel, Andreas; Lill, Pascal; Stegemann, Pierre; Bravo-Rodriguez, Kenny; Schöneweiß, Elisa-C.; Merdanovic, Melisa; Gudnason, Daniel; Aznauryan, Mikayel; Gamrad, Lisa; Barcikowski, Stephan; Sanchez-Garcia, Elsa; Birkedal, Victoria; Gatsogiannis, Christos; Ehrmann, Michael; Saccà, Barbara

2017-02-01

The self-organizational properties of DNA have been used to realize synthetic hosts for protein encapsulation. However, current strategies of DNA-protein conjugation still limit true emulation of natural host-guest systems, whose formation relies on non-covalent bonds between geometrically matching interfaces. Here we report one of the largest DNA-protein complexes of semisynthetic origin held in place exclusively by spatially defined supramolecular interactions. Our approach is based on the decoration of the inner surface of a DNA origami hollow structure with multiple ligands converging to their corresponding binding sites on the protein surface with programmable symmetry and range-of-action. Our results demonstrate specific host-guest recognition in a 1:1 stoichiometry and selectivity for the guest whose size guarantees sufficient molecular diffusion preserving short intermolecular distances. DNA nanocontainers can be thus rationally designed to trap single guest molecules in their native form, mimicking natural strategies of molecular recognition and anticipating a new method of protein caging.

Temperature-regulated guest admission and release in microporous materials

DOE PAGES

Li, Gang; Shang, Jin; Gu, Qinfen; ...

2017-06-09

While it has long been known that some highly adsorbing microporous materials suddenly become inaccessible to guest molecules below certain temperatures, previous attempts to explain this phenomenon have failed. Here we show that this anomalous sorption behaviour is a temperature-regulated guest admission process, where the pore-keeping group’s thermal fluctuations are influenced by interactions with guest molecules. A physical model is presented to explain the atomic-level chemistry and structure of these thermally regulated micropores, which is crucial to systematic engineering of new functional materials such as tunable molecular sieves, gated membranes and controlled-release nanocontainers. The model was validated experimentally with Hmore » 2, N 2, Ar and CH 4 on three classes of microporous materials: trapdoor zeolites, supramolecular host calixarenes and metal-organic frameworks. We also demonstrate how temperature can be exploited to achieve appreciable hydrogen and methane storage in such materials without sustained pressure. Our findings also open new avenues for gas sensing and isotope separation.« less

Probing structural transition and guest dynamics of hydroquinone clathrates by temperature-dependent terahertz time-domain spectroscopy.

PubMed

Lee, Eui Su; Han, Kyu Won; Yoon, Ji-Ho; Jeon, Tae-In

2011-01-13

The structural transition from hydroquinone clathrates to crystalline α-form hydroquinone was observed up to the range of 3 THz frequency as a function of temperatures. We found that all three hydroquinone clathrates, CO(2)-, CH(4)-, and CO(2)/CH(4)-loaded hydroquinone clathrates, transform into the α-form hydroquinone at around 102 ± 7 °C. The resonance peak of the CO(2)-loaded hydroquinone clathrate at 2.15 THz decreases with increasing temperature, indicating that CO(2) guest molecules are readily released from the host framework prior to the structural transformation. This reveals that the hydroquinone clathrates may transform into the stable α-form hydroquinone via the metastable form of guest-free clathrate, which depends on guest molecules enclathrated in the cages of the host frameworks. A strong resonance of the α-form hydroquinone at 1.18 THz gradually shifts to the low frequency with increasing temperature and shifts back to the high frequency with decreasing temperature.

Ghost and guest authors: you can't always trust who you read.

PubMed

Schofferman, Jerome; Wetzel, F Todd; Bono, Christopher

2015-03-01

Clinicians and educators rely on the published medical information. They trust that original research and narrative or systematic reviews are reliable and the authorship is transparent, but this is not always the case. Disclosure of conflicts of interest by authors is required by most journals, disclosure will not detect ghost or guest authorship. Ghosting or guesting is of more than academic interests because it can directly or indirectly affect patient care. Therefore it is important for readers to be aware of this issue, and to be alert to suggestions that particular works may be at increased risk for ghost or guest authors. It is important to take a proactive stance against these practices. Industry, universities, research centers, and professional medical associations should be clear and unequivocal in condeming these practices. Processes need to be in place to investigate and, if need be, deal with violations. Clearly, we must all participate in this endeavor for professional, ethical, and most importantly, best patient care reasons.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Talin, Albert Alec; Jones, Reese E.; Hopkins, Patrick E.

Motivated by low cost, low toxicity, mechanical flexibility, and conformability over complex shapes, organic semiconductors are currently being actively investigated as thermoelectric (TE) materials to replace the costly, brittle, and non-eco-friendly inorganic TEs for near-ambient-temperature applications. Metal–organic frameworks (MOFs) share many of the attractive features of organic polymers, including solution processability and low thermal conductivity. A potential advantage of MOFs and MOFs with guest molecules (Guest@MOFs) is their synthetic and structural versatility, which allows both the electronic and geometric structure to be tuned through the choice of metal, ligand, and guest molecules. This could solve the long-standing challenge of findingmore » stable, high-TE-performance n-type organic semiconductors, as well as promote high charge mobility via the long-range crystalline order inherent in these materials. In this paper, we review recent advances in the synthesis of MOF and Guest@MOF TEs and discuss how the Seebeck coefficient, electrical conductivity, and thermal conductivity could be tuned to further optimize TE performance.« less

In situ Low-temperature Pair Distribution Function (PDF) Analysis of CH4 and CO2 Hydrates

NASA Astrophysics Data System (ADS)

Cladek, B.; Everett, M.; McDonnell, M.; Tucker, M.; Keffer, D.; Rawn, C.

2017-12-01

Gas hydrates occur in ocean floor and sub-surface permafrost deposits and are stable at moderate to high pressures and low temperatures. They are a clathrate structure composed of hydrogen bonded water cages that accommodate a wide variety of guest molecules. CO2 and CH4 hydrates both crystallize as the cubic sI hydrate and can form a solid solution. Natural gas hydrates are interesting as a potential methane source and for CO2 sequestration. Long-range diffraction studies on gas hydrates give valuable structural information but do not provide a detailed understanding of the disordered gas molecule interactions with the host lattice. In-situ low temperature total scattering experiments combined with pair distribution function (PDF) analysis are used to investigate the gas molecule motions and guest-cage interactions. CO2 and methane hydrates exhibit different decomposition behavior, and CO2 hydrate has a smaller lattice parameter despite it being a relatively larger molecule. Total scattering studies characterizing both the short- and long-range order simultaneously help to elucidate the structural source of these phenomena. Low temperature neutron total scattering data were collected using the Nanoscale Ordered MAterials Diffractometer (NOMAD) beamline at the Spallation Neutron Source (SNS) on CO2 and CH4 hydrates synthesized with D2O. Guest molecule motion within cages and interactions between gases and cages are investigated through the hydrate stability and decomposition regions. Data were collected from 2-80 K at a pressure of 55 mbar on CO2 and CH4 hydrates, and from 80-270 K at 25 bar on CH4 hydrate. The hydrate systems were modeled with classical molecular dynamic (MD) simulations to provide an analysis of the total energy into guest-guest, guest-host and host-host contributions. Combined Reitveld and Reverse Monte Carlo (RMC) structure refinement were used to fit models of the data. This combined modeling and simulation characterizes the effects of CO2 and CH4 as guest molecules on the structure and decomposition of gas hydrates. Structure and thermodynamic studies will provide a more comprehensive understanding of CO2-CH4 solid solutions, exchange kinetics, and implications on hydrate structure.

Ion sensing by charge transfer absorption variations of benzocrown-bipyridinium conjugates with an alkyl chain.

PubMed

Kuwabara, Tetsuo; Satake, Ryota; Guo, Haocheng

2015-01-01

Two benzocrown ether-bipyridinium conjugates, 1 and 2, each having a different length of alkyl chains with butyl and dodecyl groups, respectively, have been synthesized for the purpose of developing a new guest-responsive color-change chemosensor. Both 1 and 2 showed yellow colors with broad absorption bands around 400 nm in acetonitrile. These are associated with the intramolecular charge transfer (CT) absorption, in which the benzocrown ether and bipyridinium units act as the donor and acceptor, respectively. Upon addition of the guest; such as Na(+), they faded in color due to the blue shift in their intramolecular charge transfer absorption bands. These are associated with the formation of 1:1 host-guest inclusion complex. Analogues, 3 and 4, both being similar in structure to 1 and 2 with non-crown ether unit, also showed intramolecular CT absorptions around 400 nm, but did not change their absorption spectra upon addition of the guest because of the lack of guest-binding abilities. The guest-induced color change of 1 and 2 can be used for alkali and alkaline metal ion sensing. Both 1 and 2 could detect divalent cations such as Mg(2+) and Ca(2+) rather than univalent ones, Li(+), Na(+), K(+), Rb(+), and Cs(+). Although a marked difference between 1 and 2 was not observed in their guest sensing abilities, the remarkable recognition of 1 and 2 for Mg(2+) and Ca(2+) was found compared with that of 5, which has benzyl unit instead of alkyl chains of 1 and 2. The sensitivity values of 1 and 2 were roughly proportional to their binding constants, as shown by the binding constants with Li(+), Na(+), Mg(2+), and Ca(2+) with the values of 910, 260, 820, and 2300 M(-1) for 1 and 930, 290, 1270, and 2790 M(-1) for 2, while the binding constants of 5 were estimated to be 930, 440, 210, and 1200 M(-1) for Li(+), Na(+), Mg(2+), and Ca(2+), respectively. The limit concentration of detection of 2 for Ca(2+) was estimated to be 0.016 mM, which was the smallest value in this system.

Formation of β-Cyclodextrin inclusion compound with doxycycline: A theoretical approach

NASA Astrophysics Data System (ADS)

Peraro, Cristian R.; Anconi, Amanda C. S. A.; Anconi, Cleber P. A.

2018-01-01

Recently, the inclusion compound formed by doxycycline and modified CD was investigated. In the inclusion compound, the unstable site of doxycycline was protected by the hydrophobic CD cavity. However, the guest arrangement inside CD cavity has not identified. In some situations, the correlation between protons of the guest and host in a 2D-ROESY experiment can be compatible with head and tail spatial arrangements. In the present work, the most stable guest spatial arrangement for the inclusion of doxycycline into β-CD was evaluated at B97-D/6-311++(2d,p) level of theory. For sake of comparison, tetracycline inclusion compound was also studied.

Large refractive index variations induced by accumulating triplet excitons under photoexcitation at low power

NASA Astrophysics Data System (ADS)

Hori, Tomoe; Totani, Kenro; Hirata, Shuzo; Watanabe, Toshiyuki

2018-07-01

Herein, we present a method for the modification of the refractive index (n), based on employing an organic molecule with a long triplet excited-state lifetime. A host-guest material composed of a cyclic aromatic as the guest and an amorphous steroidal compound as the host was used to modulate n. The guest material exhibited a triplet lifetime longer than 1 s, and a high-density triplet excited-state population was obtained upon excitation with blue-violet light. The refractive index could be changed by 0.002, even when using a relatively low excitation power level of 100 mW cm-2.

DNA-based nonlinear photonic materials

NASA Astrophysics Data System (ADS)

Heckman, Emily M.; Grote, James G.; Yaney, Perry P.; Hopkins, F. K.

2004-10-01

Deoxyribonucleic acid (DNA), extracted from salmon sperm through an enzyme isolation process, is a by-product of Japan"s fishing industry. To make DNA a suitable material for nonlinear optic (NLO) applications, it is precipitated with a surfactant complex, hexadecyltrimethlammonium chloride (CTMA). Preliminary characterization studies suggest DNA-CTMA may be a suitable host material for guest-host NLO polymer based electro-optic (EO) waveguide devices. The optical and electromagnetic properties of DNA-CTMA, as well as the development and EO measurement of a disperse red 1 (DR1) guest / DNA/CTMA host NLO material, are reported. Comparisons to a DR1 guest / poly(methyl methacrylate) (PMMA) host NLO material are made.

Other Types Of LCDs

NASA Astrophysics Data System (ADS)

Kobayashi, Shunsuke; Mochizuki, Akihiro

The following sections are included: * INTRODUCTION * TUNABLE BIREFRINGENCE LCDs * Nematic Device with Homogeneous Alignment * Nematic Device with Homeotropic Alignment * ELECTRICALLY CONTROLLED BIREFRINGENCE EFFECT LCDs WITH A COMPENSATING CELL OR POLYMER LAYERS * Super Homeotropic LCDs * Black and White STN LCDs * Optical mode interference * Guest-host mode * Double-layered STN * Retardation film compensated STN * DUAL FREQUENCY ADDRESSING LCDs * Application for DSM LCDs * Application for TN LCDs * PI-CELL * CHOLESTERIC-NEMATIC PHASE CHANGE LCDs * Storage Mode LCDs * Stabilized Hysteresis Mode LCDs * THERMALLY ADDRESSED LCDs (CHOLESTERIC) * BISTABLE LCD * WIDE VIEWING ANGLE TN LCDs USING RETARDATION SHEETS * Type 1 Cells * Type 2 Cells * REFERENCES

Prevalence of Sun Protection at Outdoor Recreation and Leisure Venues at Resorts in North America.

PubMed

Walkosz, Barbara J; Scott, Michael D; Buller, David B; Andersen, Peter A; Beck, Larry; Cutter, Gary R

2017-01-01

Exposure to solar ultra violet radiation (UVR) is a primary risk factor for skin cancer. Vacationers often fail to protect themselves from harmful UVR. The study assessed the sun protection practices of resort guests in various outdoor leisure and recreation venues during warm-weather seasons. 41 North American resorts were enrolled in a quasi-experimental randomized controlled trial. Adult guests were observed (n=4091) and surveyed (n=3694) in a cross sectional sample. Data collection was conducted in recreation and leisure venues with outdoors commons/reception areas acting as the comparison condition. The mean percent of vacationers at pools and beaches were more likely (p < 0.001) to wear sunscreen than in commons areas but less likely (p < 0.001) to wear cover-up clothing or use shade. In both samples, the combined sun protection scores were higher in commons areas compared to all venues except for outdoor dining (p < 0.001). Sun safety was suboptimal in all venues and was potentially mitigated by venue type. Approaches are needed to encourage vacationers to practice comprehensive sun protection and to work with resorts to construct built environments that facilitate rather than act as barriers to sun safety.

Editorial introduction.

PubMed

Gelso, Charles J

2007-09-01

Introduces the special section in the current issue of Psychotherapy: Theory, Research, Practice, Training. This section contains a reprint of Carl R. Rogers' (1957) seminal paper on the necessary and sufficient conditions for constructive personality change, as well as 11 reaction papers from some of the best psychotherapy theoreticians and researchers of our time. The reaction papers address the impact of Rogers' paper on the field of psychotherapy in general and therapy of the commenter's persuasion in particular, limitations of Rogers' viewpoints, the most important and enduring aspects of Rogers' theoretical statement, and how Rogers' ideas may exhibit themselves directly and indirectly in the current psychotherapy scene. (PsycINFO Database Record (c) 2010 APA, all rights reserved).

An Analysis of Eye Movement and Cognitive Load about the Editorial Design in Elementary Science Textbook

ERIC Educational Resources Information Center

Kim, Seong-un; Lim, Sung-man; Kim, Eun-ae; Yang, Il-ho

2016-01-01

This study is for the implication of editorial design in science textbooks which are designed for student-centered instruction, when the elements of the editorial design are different, we focus on how the students' eye movement and cognitive load change. For this, we produced a new book for 5th grade students in elementary school that is modified…

Programmable In Vitro Coencapsidation of Guest Proteins for Intracellular Delivery by Virus-like Particles.

PubMed

Dashti, Noor H; Abidin, Rufika S; Sainsbury, Frank

2018-05-22

Bioinspired self-sorting and self-assembling systems using engineered versions of natural protein cages are being developed for biocatalysis and therapeutic delivery. The packaging and intracellular delivery of guest proteins is of particular interest for both in vitro and in vivo cell engineering. However, there is a lack of bionanotechnology platforms that combine programmable guest protein encapsidation with efficient intracellular uptake. We report a minimal peptide anchor for in vivo self-sorting of cargo-linked capsomeres of murine polyomavirus (MPyV) that enables controlled encapsidation of guest proteins by in vitro self-assembly. Using Förster resonance energy transfer, we demonstrate the flexibility in this system to support coencapsidation of multiple proteins. Complementing these ensemble measurements with single-particle analysis by super-resolution microscopy shows that the stochastic nature of coencapsidation is an overriding principle. This has implications for the design and deployment of both native and engineered self-sorting encapsulation systems and for the assembly of infectious virions. Taking advantage of the encoded affinity for sialic acids ubiquitously displayed on the surface of mammalian cells, we demonstrate the ability of self-assembled MPyV virus-like particles to mediate efficient delivery of guest proteins to the cytosol of primary human cells. This platform for programmable coencapsidation and efficient cytosolic delivery of complementary biomolecules therefore has enormous potential in cell engineering.

A molecular dynamics study of ethanol-water hydrogen bonding in binary structure I clathrate hydrate with CO2

NASA Astrophysics Data System (ADS)

Alavi, Saman; Ohmura, Ryo; Ripmeester, John A.

2011-02-01

Guest-host hydrogen bonding in clathrate hydrates occurs when in addition to the hydrophilic moiety which causes the molecule to form hydrates under high pressure-low temperature conditions, the guests contain a hydrophilic, hydrogen bonding functional group. In the presence of carbon dioxide, ethanol clathrate hydrate has been synthesized with 10% of large structure I (sI) cages occupied by ethanol. In this work, we use molecular dynamics simulations to study hydrogen bonding structure and dynamics in this binary sI clathrate hydrate in the temperature range of 100-250 K. We observe that ethanol forms long-lived (>500 ps) proton-donating and accepting hydrogen bonds with cage water molecules from both hexagonal and pentagonal faces of the large cages while maintaining the general cage integrity of the sI clathrate hydrate. The presence of the nondipolar CO2 molecules stabilizes the hydrate phase, despite the strong and prevalent alcohol-water hydrogen bonding. The distortions of the large cages from the ideal form, the radial distribution functions of the guest-host interactions, and the ethanol guest dynamics are characterized in this study. In previous work through dielectric and NMR relaxation time studies, single crystal x-ray diffraction, and molecular dynamics simulations we have observed guest-water hydrogen bonding in structure II and structure H clathrate hydrates. The present work extends the observation of hydrogen bonding to structure I hydrates.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Ullman, Andrew M.; Brown, Jonathan W.; Foster, Michael E.

As the world transitions from fossil fuels to clean energy sources in the coming decades, many technological challenges will require chemists and material scientists to develop new materials for applications related to energy conversion, storage, and efficiency. Because of their unprecedented adaptability, metal–organic frameworks (MOFs) will factor strongly in this portfolio. By utilizing the broad synthetic toolkit provided by the fields of organic and inorganic chemistry, MOF pores can be customized to suit a particular application. Of particular importance is the ability to tune the strength of the interaction between the MOF pores and guest molecules. By cleverly controlling thesemore » MOF–guest interactions, the chemist may impart new function into the Guest@MOF materials otherwise lacking in vacant MOF. Herein, we highlight the concept of the Guest@MOF as it relates to our efforts to develop these materials for energy-related applicatons. Additionally, our work in the areas of H 2 and noble gas storage, hydrogenolysis of biomass, light-harvesting, and conductive materials will be discussed. Of relevance to light-harvesting applications, we report for the first time a postsynthetic modification strategy for increasing the loading of a light-sensitive electron-donor molecule in the pores of a functionalized MIL-101 structure. Through the demonstrated versatility of these approaches, we show that, by treating guest molecules as integral design elements for new MOF constructs, MOF science can have a significant impact on the advancement of clean energy technologies.« less

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kevin Young

In this paper, the author describes how engineers can increase the number of future engineers by volunteering as guest speakers in the elementary school classroom. The paper is divided into three main subjects. First, the importance of engineers speaking directly with young students is discussed. Next, several best practice techniques for speaking with young students are described. Finally, information on getting started as a guest speaker is presented, and a list of resources available to guest speakers is provided. The guest engineer speaking to an elementary school audience (ages 6-11) performs a critical role in encouraging young students to pursuemore » a career in engineering. Often, he or she is the first engineer these students meet in person, providing a crucial first impression of the engineering career field and a positive visual image of what an engineer really looks like. A dynamic speaker presenting a well-delivered talk creates a lasting, positive impression on students, influencing their future decisions to pursue careers in engineering. By reaching these students early in life, the guest speaker will help dispel the many prevailing stereotypes about engineers which discourage so many students, especially young women, from considering this career. The guest speaker can ensure young students gain a positive first impression of engineers and the engineering career field by following some best practice techniques in preparing for and delivering their presentation. The author, an electrical engineer, developed these best practice techniques over the past 10 years while presenting over 350 talks on engineering subjects to elementary school students as a volunteer speaker with the U.S. Department of Energy, Idaho National Laboratory’s Speakers Bureau. Every engineer can make a meaningful contribution toward reversing the predicted shortfall of future engineers by volunteering to speak with young students at the elementary school level. Elementary school teachers typically have a limited education in engineering and are eager to have career engineers speak with their students. As an engineer, there are many opportunities to get involved with guest speaking at the elementary school level. If you have a young child, start by meeting with her or his teacher and volunteering to give a presentation on engineering to the class. Many organizations have formal speakers bureaus. If your organization does not have one, consider starting one. There are several excellent resources on the Internet, such as the IEEE Center for Pre-University Engineering Education’s TryEngineering.org Web site. This site is designed for young students, teachers and parents, giving information on engineering careers and engineering activities the guest speaker can use to prepare a dynamic and informative presentation. Young students who have experienced a positive interaction with an engineer are more likely to pursue a career in engineering. Effective guest speaking by engineers in elementary school classrooms today will increase the likelihood these young students will become the desperately needed engineers of our future.« less

Cucurbit[n]uril-Based Microcapsules Self-Assembled within Microfluidic Droplets: A Versatile Approach for Supramolecular Architectures and Materials

PubMed Central

2017-01-01

Conspectus Microencapsulation is a fundamental concept behind a wide range of daily applications ranging from paints, adhesives, and pesticides to targeted drug delivery, transport of vaccines, and self-healing concretes. The beauty of microfluidics to generate microcapsules arises from the capability of fabricating monodisperse and micrometer-scale droplets, which can lead to microcapsules/particles with fine-tuned control over size, shape, and hierarchical structure, as well as high reproducibility, efficient material usage, and high-throughput manipulation. The introduction of supramolecular chemistry, such as host–guest interactions, endows the resultant microcapsules with stimuli-responsiveness and self-adjusting capabilities, and facilitates hierarchical microstructures with tunable stability and porosity, leading to the maturity of current microencapsulation industry. Supramolecular architectures and materials have attracted immense attention over the past decade, as they open the possibility to obtain a large variety of aesthetically pleasing structures, with myriad applications in biomedicine, energy, sensing, catalysis, and biomimicry, on account of the inherent reversible and adaptive nature of supramolecular interactions. As a subset of supramolecular interactions, host–guest molecular recognition involves the formation of inclusion complexes between two or more moieties, with specific three-dimensional structures and spatial arrangements, in a highly controllable and cooperative manner. Such highly selective, strong yet dynamic interactions could be exploited as an alternative methodology for programmable and controllable engineering of supramolecular architectures and materials, exploiting reversible interactions between complementary components. Through the engineering of molecular structures, assemblies can be readily functionalized based on host–guest interactions, with desirable physicochemical characteristics. In this Account, we summarize the current state of development in the field of monodisperse supramolecular microcapsules, fabricated through the integration of traditional microfluidic techniques and interfacial host–guest chemistry, specifically cucurbit[n]uril (CB[n])-mediated host–guest interactions. Three different strategies, colloidal particle-driven assembly, interfacial condensation-driven assembly and electrostatic interaction-driven assembly, are classified and discussed in detail, presenting the methodology involved in each microcapsule formation process. We highlight the state-of-the-art in design and control over structural complexity with desirable functionality, as well as promising applications, such as cargo delivery stemming from the assembled microcapsules. On account of its dynamic nature, the CB[n]-mediated host–guest complexation has demonstrated efficient response toward various external stimuli such as UV light, pH change, redox chemistry, and competitive guests. Herein, we also demonstrate different microcapsule modalities, which are engineered with CB[n] host–guest chemistry and also can be disrupted with the aid of external stimuli, for triggered release of payloads. In addition to the overview of recent achievements and current limitations of these microcapsules, we finally summarize several perspectives on tunable cargo loading and triggered release, directions, and challenges for this technology, as well as possible strategies for further improvement, which will lead to substainitial progress of host–guest chemistry in supramolecular architectures and materials. PMID:28075551

A spectroscopic study of the structure and occupancies of clathrate hydrates incorporating hydrogen

NASA Astrophysics Data System (ADS)

Grim, R. Gary

With the ability to store and concentrate gases inside a clean and abundant water framework, clathrate hydrates are considered to be a promising material for many applications related to gas storage, separation, and sequestration. Hydrates of hydrogen are particularly interesting, for in addition to these potential applications, the small molecular size provides an opportunity for use as a model guest in many fundamental studies such as guest diffusion, multiple guest occupancy, and quantum mechanical effects upon confinement. In attempt to study these effects and the viability of H 2 hydrates as an energy storage material, a combined experimental and theoretical approach incorporating Raman spectroscopy, X-ray and neutron diffraction, nuclear magnetic resonance, ab-initio calculations, and molecular dynamic simulations was performed. One of the most significant challenges in the application of H2 clathrate hydrates is the demanding thermodynamic requirements needed for stability. In recent years, a mechanism known as the `tuning' effect had reportedly solved this issue where thermodynamic requirements could be reduced while simultaneously maintaining high storage capacities. In this work, the viability and validity of this technique is explored and alternative explanations in the form of epitaxial hydrate growth under high driving force conditions are discussed. A second, and equally important challenge facing clathrate hydrates as a future storage material is the overall storage capacity of H2. In previous work, H2 has only been experimentally verified to occupy the small 512 and 43566 3 cages and also in the large 51264 cages of the type II clathrate, often with an energy deficient promoter. In order to achieve more robust energy densities, other hydrate cages must be accessible. Herein a new method for increasing overall hydrate energy densities is presented involving the incorporation of H2 in the large cages of the type I clathrate with CH4 as a co-guest molecule. Finally, for all of the collective research on gas hydrates since their discovery in 1810 by Sir Humphrey Davy, the one common theme that unites them is the assumption that guest molecules are trapped at the center (or near center) of the host water cages that makes up the respective crystal structure. For the first time, this work provides evidence suggesting that this definition of clathrate hydrate guest occupancy is possibly incomplete, and should include the addition of interstitial sites within the water crystal lattice. Specifically, H2 is found within the shared heptagonal faces of the large (4 3596273) cage and in cavities formed from the disruption of smaller (445 4) water cages in structure VI hydrates. The ability of H2 to occupy these interstitial sites and fluctuate position in the crystal lattice demonstrates the dynamic behavior of H2 in solids and reveals new insight into guest-guest and guest-host interactions in clathrate hydrates with potential implications in increasing overall energy storage properties.

What are the qualifications and selection criteria for women to be appointed to society journal editorial boards?

PubMed

Tomizawa, Yasuko

2014-02-01

Japan ranks extremely low in global ranking of gender equality. It is not easy for female doctors to acquire leadership positions in member societies of the Japanese Association of Medical Science (JAMS). Very few women are included on editorial boards of English medical journals in Japan. Furthermore, until last year, there had been no female editors in English language journals of surgical societies. The qualifications and criteria for selecting editorial board members of medical journals should be clarified. Medical journals in Japan would gain diversity by including women on editorial boards in the same proportion as women membership in the corresponding medical societies.

Astrobee Guest Science

NASA Technical Reports Server (NTRS)

Barlow, Jonathan; Benavides, Jose; Provencher, Chris; Bualat, Maria; Smith, Marion F.; Mora Vargas, Andres

2017-01-01

At the end of 2017, Astrobee will launch three free-flying robots that will navigate the entire US segment of the ISS (International Space Station) and serve as a payload facility. These robots will provide guest science payloads with processor resources, space within the robot for physical attachment, power, communication, propulsion, and human interfaces.

The Joe Show on Third Rock Radio

NASA Image and Video Library

2017-12-01

Tune into Third Rock Radio for The Joe Show starring Joe Acaba as Guest DJ on Thursday, December 7th at 5pm ET. Third Rock Radio's Guest DJ series spotlights NASA astronauts aboard the International Space Station, playing music and sharing their experiences. For more information visit: thirdrockradio.rfcmedia.com

One Year Term Review as a Participating Guest in the Detonator and Detonation Physics Group

DOE Office of Scientific and Technical Information (OSTI.GOV)

Lefrancois, A; Roeske, F; Tran, T

2006-02-06

The one year stay was possible after a long administrative process, because of the fact that this was the first participating guest of B division as a foreign national in HEAF (High Explosives Application Facility) with the Detonator/Detonation Physics Group.

32 CFR 705.23 - Guest cruises.

Code of Federal Regulations, 2013 CFR

2013-07-01

... professional associations. (ii) Embarkation of media representatives on assignment is discussed in § 705.14..., if so designated) have the authority to use Navy ships to embark individuals other than news media... embarked flag officer. (4) A caution that guests should not accept the invitation unless they are in good...

32 CFR 705.23 - Guest cruises.

Code of Federal Regulations, 2010 CFR

2010-07-01

... professional associations. (ii) Embarkation of media representatives on assignment is discussed in § 705.14..., if so designated) have the authority to use Navy ships to embark individuals other than news media... embarked flag officer. (4) A caution that guests should not accept the invitation unless they are in good...

32 CFR 705.23 - Guest cruises.

Code of Federal Regulations, 2012 CFR

2012-07-01

... professional associations. (ii) Embarkation of media representatives on assignment is discussed in § 705.14..., if so designated) have the authority to use Navy ships to embark individuals other than news media... embarked flag officer. (4) A caution that guests should not accept the invitation unless they are in good...

32 CFR 705.23 - Guest cruises.

Code of Federal Regulations, 2011 CFR

2011-07-01

... professional associations. (ii) Embarkation of media representatives on assignment is discussed in § 705.14..., if so designated) have the authority to use Navy ships to embark individuals other than news media... embarked flag officer. (4) A caution that guests should not accept the invitation unless they are in good...

32 CFR 705.23 - Guest cruises.

Code of Federal Regulations, 2014 CFR

2014-07-01

... professional associations. (ii) Embarkation of media representatives on assignment is discussed in § 705.14..., if so designated) have the authority to use Navy ships to embark individuals other than news media... embarked flag officer. (4) A caution that guests should not accept the invitation unless they are in good...

A food-borne outbreak of cryptosporidiosis among guests and staff at a hotel restaurant in Stockholm county, Sweden, September 2008.

PubMed

Insulander, M; de Jong, B; Svenungsson, B

2008-12-18

In September 2008, 21 cases of cryptosporidiosis occurred among guests and staff at a wedding reception in a hotel restaurant in Stockholm county, Sweden. The most probable source of the outbreak was bearnaise sauce containing chopped fresh parsley.

Co-occurring substance use and mental disorders in the criminal justice system: a new frontier of clinical practice and research.

PubMed

Peters, Roger H; Wexler, Harry K; Lurigio, Arthur J

2015-03-01

This editorial introduces this special section of the Psychiatric Rehabilitation Journal, which focuses on justice-involved persons with co-occurring mental and substance use disorders (CODs). It contains seven original articles examining CODs among justice-involved populations that vary by gender, age, setting (e.g., community/ court, jail, prison), environment (urban, rural), geographic region, and nationality. (PsycINFO Database Record (c) 2015 APA, all rights reserved).

Best Practices in Health Promotion: The Joy of Chasing the Uncatchable.

PubMed

Terry, Paul E

2017-09-01

Continuous quality improvement (CQI) systems enable organizations to get better and better at what they do, thereby increasing the value of the products they make or the services they provide. This editorial argues that CQI principles are closely related to the goal of this journal to advance best practices in health promotion. To this end, contributors of articles are called on to write a discussion section that offers soaring insights alongside practical takeaways for our readers. Unlike other sections of an article, the discussion section is where scientists should feel emboldened to speculate, admit surprises, and muse about possible cause and effect relationships they found gratifying or troubling. The discussion section is our window into how today's best practices are informing next practices or are about to be supplanted by a better idea.

Genre Variations and the Interpersonal Features: An SFL Study of the Indian and the British Editorials and News-Reports

ERIC Educational Resources Information Center

Singh, Charanjit; Singh, Sukhdev

2013-01-01

In this article the authors present a discussion on the genre of editorial as distinct from that of news-reports in that its language is more loaded with attitudes and more indeterminate and hedged than that in the genre of news-report. Another distinctiveness the authors point out is that the genre of editorial is not only concerned with the…

Strategic Studies Quarterly. Volume 2, Number 3, Fall 2008

DTIC Science & Technology

2008-01-01

Managing Editor Betty R. Littlejohn, Editorial Assistant Jerry L. Gantt, Content Editor Sherry Terrell , Editorial Assistant Steven C. Garst...factsheet.asp?id=107 . Ibid. 9. Lt Col Sebastian M. Convertino II, CDR Lou Anne DeMattei, and Lt Col Tammy Knierim, Flying and Fighting in...PhD, Editor-in-Chief L. Tawanda Eaves, Managing Editor Betty R. Littlejohn, Editorial Assistant Jerry L. Gantt, Content Editor Sherry Terrell

Noncovalent Complexation of Monoamine Neurotransmitters and Related Ammonium Ions by Tetramethoxy Tetraglucosylcalix[4]arene

NASA Astrophysics Data System (ADS)

Torvinen, Mika; Kalenius, Elina; Sansone, Francesco; Casnati, Alessandro; Jänis, Janne

2012-02-01

The noncovalent complexation of monoamine neurotransmitters and related ammonium and quaternary ammonium ions by a conformationally flexible tetramethoxy glucosylcalix[4]arene was studied by electrospray ionization Fourier transform ion cyclotron resonance (ESI-FTICR) mass spectrometry. The glucosylcalixarene exhibited highest binding affinity towards serotonin, norepinephrine, epinephrine, and dopamine. Structural properties of the guests, such as the number, location, and type of hydrogen bonding groups, length of the alkyl spacer between the ammonium head-group and the aromatic ring structure, and the degree of nitrogen substitution affected the complexation. Competition experiments and guest-exchange reactions indicated that the hydroxyl groups of guests participate in intermolecular hydrogen bonding with the glucocalixarene.

Interrogating ultrafast dynamics of a salicylideneaniline derivative within faujasite zeolites

NASA Astrophysics Data System (ADS)

Alarcos, Noemí; Sánchez, Félix; Douhal, Abderrazzak

2017-09-01

We report on femtosecond (fs) studies of (E)-2-(2-hydroxybenzyliden) amino-4-nitrophenol (HBA-4NP) in dichloromethane (DCM) and triacetin (TAC) solutions, and within NaX and NaY zeolites. In solution, an ultrafast (≤80 fs) excited-state intramolecular proton-transfer (ESIPT) reaction produces a keto (K) tautomer, which undergoes a rotational process in ∼4 (DCM) and ∼7 ps (TAC) toward the formation of non-emitting structures. Within NaX and NaY, where monomers and aggregates are formed, host-guest and guest-guest interactions play an important role in the ultrafast behaviour of these complexes. These results clearly reflect how nanoconfinement and zeolite composition affect the encapsulated dye photodynamics.

Techno-Velcro to Techno-Memoria: Technology, Rhetoric, and Family in the Composition Classroom

ERIC Educational Resources Information Center

Ericsson, Patricia Freitag; Muhlhauser, Paul

2011-01-01

"Techno-velcro to Techno-memoria" is an intergenerational collection of techno-memories illustrating the impact of techno-literacies on family communication practices. Guests participating in "Techno-velcro to Techno-memoria" add their voices to create a rich resource of techno-rhetorical connections. Our guest-collaborators remember and describe…

Pedagogical Guest Room as an Educational Form of Students' Pedagogical Competence Development

ERIC Educational Resources Information Center

Sabirova, Elvira G.

2016-01-01

Actuality of the studied problem is conditioned by the fact that certain work forms with students represent possibilities for organizing educative activity of more complex level. The article is aimed on revealing educative potentiality of "pedagogical guest room" as one of the forms intended on development of students' pedagogical…

Impact of Industry Guest Speakers on Business Students' Perceptions of Employability Skills Development

ERIC Educational Resources Information Center

Riebe, L.; Sibson, R.; Roepen, D.; Meakins, K.

2013-01-01

This study provides insights into the perceptions and expectations of Australian undergraduate business students (n=150) regarding the incorporation of guest speakers into the curriculum of a leadership unit focused on employability skills development. The authors adopted a mixed methods approach. A survey was conducted, with quantitative results…

26 CFR 49.4252-2 - Toll telephone service.

Code of Federal Regulations, 2011 CFR

2011-04-01

... telephone message or conversation. (2) The tax attaches to the total charge made to a hotel or similar subscriber for toll telephone service furnished to the hotel or its guests, but no tax attaches to any charge made by the hotel for service rendered in placing the calls for its guests. (c) Cross reference. For...

Open Simulation Laboratories [Guest editors' introduction

DOE PAGES

Alexander, Francis J.; Meneveau, Charles

2015-09-01

The introduction for the special issue on open simulation laboratories, the guest editors describe how OSLs will become more common as their potential is better understood and they begin providing access to valuable datasets to much larger segments of the scientific community. Moreover, new analysis tools and ways to do science will inevitably develop as a result.

26 CFR 49.4252-2 - Toll telephone service.

Code of Federal Regulations, 2010 CFR

2010-04-01

... telephone message or conversation. (2) The tax attaches to the total charge made to a hotel or similar subscriber for toll telephone service furnished to the hotel or its guests, but no tax attaches to any charge made by the hotel for service rendered in placing the calls for its guests. (c) Cross reference. For...

Synthesis and Small Molecule Exchange Studies of a Magnesium Bisformate Metal-Organic Framework: An Experiment in Host-Guest Chemistry for the Undergraduate Laboratory

ERIC Educational Resources Information Center

Rood, Jeffrey A.; Henderson, Kenneth W.

2013-01-01

concepts of host-guest chemistry and size exclusion in porous metal-organic frameworks (MOFs). The experiment has been successfully carried out in both introductory and advanced-level inorganic chemistry laboratories. Students synthesized the porous MOF, alpha-Mg[subscript…

Sphagnum as an Indicator of Wetland Hydrology in the Atlantic and Gulf Coastal Plain Region

DTIC Science & Technology

2010-07-01

habitats throughout much of its range (Flora of North America Editorial Committee 2007). Sphagnum distribution is deter- mined primarily by the...or mats in mesic to wet, shallow depressions in roadside ditches, flatwoods, pocosin margins, and swamps (Flora of North America Editorial...of North America Editorial Committee 2007; Anderson et al. 2009). Like- wise, S. tenerum is common in mesic savannas, pine barrens, moist road

Data Sharing: A New Editorial Initiative of the International Committee of Medical Journal Editors. Implications for the Editors’ Network

PubMed Central

Alfonso, Fernando; Adamyan, Karlen; Artigou, Jean-Yves; Aschermann, Michael; Boehm, Michael; Buendia, Alfonso; Chu, Pao-Hsien; Cohen, Ariel; Dei Cas, Livio; Dilic, Mirza; Doubell, Anton; Echeverri, Dario; Enç, Nuray; Ferreira-González, Ignacio; J. Filipiak, Krzysztof; Flammer, Andreas; Fleck, Eckart; Gatzov, Plamen; Ginghina, Carmen; Goncalves, Lino; Haouala, Habib; Hassanein, Mahmoud; Heusch, Gerd; Huber, Kurt; Hulín, Ivan; Ivanusa, Mario; Krittayaphong, Rungroj; Lau, Chu-Pak; Marinskis, Germanas; Mach, François; Moreira, Luiz Felipe; Nieminen, Tuomo; Oukerraj, Latifa; Perings, Stefan; Pierard, Luc; Potpara, Tatjana; Reyes-Caorsi, Walter; Rim, Se-Joong; Rødevand, Olaf; Saade, Georges; Sander, Mikael; Shlyakhto, Evgeny; Timuralp, Bilgin; Tousoulis, Dimitris; Ural, Dilek; Piek, J. J.; Varga, Albert; Lüscher, Thomas F.

2017-01-01

The International Committee of Medical Journal Editors (ICMJE) provides recommendations to improve the editorial standards and scientific quality of biomedical journals. These recommendations range from uniform technical requirements to more complex and elusive editorial issues including ethical aspects of the scientific process. Recently, registration of clinical trials, conflicts of interest disclosure, and new criteria for authorship- emphasizing the importance of responsibility and accountability-, have been proposed. Last year, a new editorial initiative to foster sharing of clinical trial data was launched. This review discusses this novel initiative with the aim of increasing awareness among readers, investigators, authors and editors belonging to the Editors’ Network of the European Society of Cardiology. PMID:28630534

Data Sharing: A New Editorial Initiative of the International Committee of Medical Journal Editors. Implications for the Editors´ Network.

PubMed

Alfonso, Fernando; Adamyan, Karlen; Artigou, Jean Yves; Aschermann, Michael; Boehm, Michael; Buendia, Alfonso; Chu, Pao Hsien; Cohen, Ariel; Cas, Livio Dei; Dilic, Mirza; Doubell, Anton; Echeverri, Dario; Enç, Nuray; Ferreira-González, Ignacio; Filipiak, Krzysztof J; Flammer, Andreas; Fleck, Eckart; Gatzov, Plamen; Ginghina, Carmen; Goncalves, Lino; Haouala, Habib; Hassanein, Mahmoud; Heusch, Gerd; Huber, Kurt; Hulín, Ivan; Ivanusa, Mario; Krittayaphong, Rungroj; Lau, Chu Pak; Marinskis, Germanas; Mach, François; Moreira, Luiz Felipe; Nieminen, Tuomo; Oukerraj, Latifa; Perings, Stefan; Pierard, Luc; Potpara, Tatjana; Reyes-Caorsi, Walter; Rim, Se Joong; Rødevand, Olaf; Saade, Georges; Sander, Mikael; Shlyakhto, Evgeny; Timuralp, Bilgin; Tousoulis, Dimitris; Ural, Dilek; Piek, J J; Varga, Albert; Lüscher, Thomas F

2017-06-01

The International Committee of Medical Journal Editors (ICMJE) provides recommendations to improve the editorial standards and scientific quality of biomedical journals. These recommendations range from uniform technical requirements to more complex and elusive editorial issues including ethical aspects of the scientific process. Recently, registration of clinical trials, conflicts of interest disclosure, and new criteria for authorship -emphasizing the importance of responsibility and accountability-, have been proposed. Last year, a new editorial initiative to foster sharing of clinical trial data was launched. This review discusses this novel initiative with the aim of increasing awareness among readers, investigators, authors and editors belonging to the Editors´ Network of the European Society of Cardiology.

Data Sharing: A New Editorial Initiative of the International Committee of Medical Journal Editors. Implications for the Editors´ Network

PubMed Central

Alfonso, Fernando; Adamyan, Karlen; Artigou, Jean-Yves; Aschermann, Michael; Boehm, Michael; Buendia, Alfonso; Chu, Pao-Hsien; Cohen, Ariel; Cas, Livio Dei; Dilic, Mirza; Doubell, Anton; Echeverri, Dario; Enç, Nuray; Ferreira-González, Ignacio; Filipiak, Krzysztof J.; Flammer, Andreas; Fleck, Eckart; Gatzov, Plamen; Ginghina, Carmen; Goncalves, Lino; Haouala, Habib; Hassanein, Mahmoud; Heusch, Gerd; Huber, Kurt; Hulín, Ivan; Ivanusa, Mario; Krittayaphong, Rungroj; Lau, Chu-Pak; Marinskis, Germanas; Mach, François; Moreira, Luiz Felipe; Nieminen, Tuomo; Oukerraj, Latifa; Perings, Stefan; Pierard, Luc; Potpara, Tatjana; Reyes-Caorsi, Walter; Rim, Se-Joong; Rødevand, Olaf; Saade, Georges; Sander, Mikael; Shlyakhto, Evgeny; Timuralp, Bilgin; Tousoulis, Dimitris; Ural, Dilek; Piek, J. J.; Varga, Albert; Lüscher, Thomas F.

2017-01-01

The International Committee of Medical Journal Editors (ICMJE) provides recommendations to improve the editorial standards and scientific quality of biomedical journals. These recommendations range from uniform technical requirements to more complex and elusive editorial issues including ethical aspects of the scientific process. Recently, registration of clinical trials, conflicts of interest disclosure, and new criteria for authorship - emphasizing the importance of responsibility and accountability-, have been proposed. Last year, a new editorial initiative to foster sharing of clinical trial data was launched. This review discusses this novel initiative with the aim of increasing awareness among readers, investigators, authors and editors belonging to the Editors´ Network of the European Society of Cardiology. PMID:28591318

Photoluminescent Metal–Organic Frameworks for Gas Sensing

PubMed Central

Lin, Rui‐Biao; Liu, Si‐Yang; Ye, Jia‐Wen; Li, Xu‐Yu

2016-01-01

Luminescence of porous coordination polymers (PCPs) or metal–organic frameworks (MOFs) is sensitive to the type and concentration of chemical species in the surrounding environment, because these materials combine the advantages of the highly regular porous structures and various luminescence mechanisms, as well as diversified host‐guest interactions. In the past few years, luminescent MOFs have attracted more and more attention for chemical sensing of gas‐phase analytes, including common gases and vapors of solids/liquids. While liquid‐phase and gas‐phase luminescence sensing by MOFs share similar mechanisms such as host‐guest electron and/or energy transfer, exiplex formation, and guest‐perturbing of excited‐state energy level and radiation pathways, via various types of host‐guest interactions, gas‐phase sensing has its unique advantages and challenges, such as easy utilization of encapsulated guest luminophores and difficulty for accurate measurement of the intensity change. This review summarizes recent progresses by using luminescent MOFs as reusable sensing materials for detection of gases and vapors of solids/liquids especially for O2, highlighting various strategies for improving the sensitivity, selectivity, stability, and accuracy, reducing the materials cost, and developing related devices. PMID:27818903