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1

Surface trap for ytterbium ions  

E-print Network

We conducted an experiment to load a shallow planar ion trap from a cold atom source of Ytterbium using photoionization. The surface trap consisted of a three-rod radio frequency Paul trap fabricated using standard printed ...

Campbell, Jonathan A. (Jonathan Alan)

2006-01-01

2

Neutron Resonance Parameters for Yb-171 (Ytterbium)  

NASA Astrophysics Data System (ADS)

This document is part of the Supplement containing the complete sets of data of Volume 24 `Neutron Resonance Parameters' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms'. It provides the neutron resonance parameters for the isotope Yb-171 (Ytterbium).

Sukhoruchkin, S. I.; Soroko, Z. N.

3

Photodarkening in ytterbium-doped silica fibers  

Microsoft Academic Search

Ytterbium-doped fibers are widely used in application s requiring short fiber amplifiers for high peak pow er pulse amplification. One of the key challenges posed on the performance and reliability of such amplifiers is mitig ating photodarkening of the active fiber. Photodarkening manifests itself as a temporal increase in broadband absor ption centered at visible wavelengths, and varies on how

J. J. Koponen; M. J. Söderlund; S. K. T. Tammela; H. Po

2005-01-01

4

Kilowatt Ytterbium-Raman fiber laser.  

PubMed

A kilowatt-level Raman fiber laser is demonstrated with an integrated Ytterbium-Raman fiber amplifier architecture. A high power Ytterbium-doped fiber master oscillator power amplifier at 1080 nm is seeded with a 1120 nm fiber laser at the same time. By this way, a kilowatt-level Raman pump laser at 1080 nm and signal laser at 1120 nm is combined in the fiber core. The subsequent power conversion from 1080 nm to 1120 nm is accomplished in a 70 m long passive fiber. A 1.28 kW all-fiber Raman amplifier at 1120 nm with an optical efficiency of 70% is demonstrated, limited only by the available pump power. To the best of our knowledge, this is the first report of Raman fiber laser with over one kilowatt output. PMID:25089467

Zhang, Lei; Liu, Chi; Jiang, Huawei; Qi, Yunfeng; He, Bing; Zhou, Jun; Gu, Xijia; Feng, Yan

2014-07-28

5

New data on activation cross section for deuteron induced reactions on ytterbium up to 50 MeV  

NASA Astrophysics Data System (ADS)

Activation cross sections of deuteron induced reactions on ytterbium for production of 177g,173,172,171,170,169,167Lu, 177,175,169Yb and 173,168,167,165Tm were extended up to 50 MeV deuteron energy. The new data are in acceptable agreement with the earlier experimental data in the overlapping energy region. The experimental data are compared with the predictions of the ALICE-D, EMPIRE-D and TALYS 1.4 (TENDL-2013 on-line library results) codes.

Tárkányi, F.; Ditrói, F.; Takács, S.; Hermanne, A.; Ignatyuk, A. V.

2014-10-01

6

Highly ytterbium-doped bismuth-oxide-based fiber.  

PubMed

Thermally stable highly ytterbium-doped bismuth-oxide-based glasses have been investigated. The absorbance increased linearly with Yb(2)O(3) concentration, reaching 7800 dB/m with 3 mol-% of Yb(2)O(3). An ytterbium-doped bismuth-oxide-based fiber has also been fabricated with a fiber loss of 0.24 dB/m. A fiber laser is also demonstrated, and it shows a slope efficiency of 36%. PMID:19654819

Ohara, Seiki; Kuroiwa, Yutaka

2009-08-01

7

Energy Transfer and Upconversion in YTTERBIUM:YAG and YTTERBIUM:ERBIUM:YAG  

NASA Astrophysics Data System (ADS)

Energy transfer and upconversion have been studied in ytterbium, and ytterbium-erbium doped YAG (yttrium-aluminum garnet rm Y_2 Al_5 O_ {12}). The energy-transfer probabilities were calculated for Yb-Yb, Yb-Er, and Er-Yb interactions, as well as for Er-Er and Yb-Er upconversion. The transfer of excitation from ytterbium to erbium was found experimentally to be efficient for Er concentrations above about 1%, with a Yb concentration of 6.5%. The Burshtein hopping model for donor migration-assisted transfer was applied to the Yb-Er system for different Er concentrations. Fitting the decay predicted by the Burshtein model to the Yb fluorescence gave a value for the Yb-Er dipole-dipole interaction strength which was in very close agreement with the calculated value, but discrepancies were noted for the donor-donor interaction. Upconversion was observed during pulsed measurements, and studied in detail with intense CW pumping. The Yb -Er upconversion was observed to dominate the Er-Er upconversion in the Yb-Er samples. Values for the Yb-Er and Er-Er rm(^4 I_{11/2}) upconversion coefficients were determined from quantitative measurements of the ^4 S_ {3/2} fluorescence which these processes generate, and measurements of the change in ^4 I_{11/2} population with increasing pump density. The quenching of nominally pure Yb:YAG by trace rare-earth impurities was also studied. The time dependence of the Yb fluorescence decay in some high-concentration samples suggested a fast quenching process active at high excited-ion densities, and a slower one at lower excited -ion densities. Study of the cooperative luminescence emitted by excited Yb pairs suggested a quenching mechanism acting preferentially on pairs. Sensitive Ar^+-ion laser -pumped fluorescence measurements showed the presence of high ppm levels of several impurities, including erbium, thulium and chromium. Pumping the ytterbium at 940 nm using pulsed and CW lasers revealed erbium and thulium upconversion. The latter is a three-step process, and its time-dependence illustrated the importance of Yb-Yb migration to the impurity quenching.

Lacovara, Philip

8

Radiation effects on ytterbium-doped optical fibers  

NASA Astrophysics Data System (ADS)

Assuming on-board satellite high-bandwidth communications will utilize passive optical fibers as a communication channel, this work focused on the impact of gamma and mixed gamma/neutron radiation on transmission through single-mode and multi-mode ytterbium-doped single-mode fibers operated as amplifiers for a 1060-nm light source. Standard optical patch cables were evaluated along with active ytterbium -doped double-clad fibers in the same radiation environment. Exposure times and signal transmission wavelength variations were used to investigate the degradation of the fibers exposed to total doses above 100 krad(Si). Further, the effect on the amplified signal gain was studied for the ytterbium -doped fibers. The increased attenuation in the fibers across a broad wavelength range in response to multiple levels of gamma radiation exposure, along with the effect that increased attenuation has on the actively pumped ytterbium -doped fiber amplifier performance was evaluated. Ytterbium-doped optical fibers demonstrate sensitivity to gamma and mixed neutron/gamma radiation exposures that is independent of the operational configuration of the fiber during irradiation. No identifiable dose rate damage production mechanism was encountered. However, fiber damage recovery following irradiation was found to be dependent on the radiation dose rate.

Singleton, Briana J.

9

1028 nm single mode Ytterbium-doped fiber laser  

NASA Astrophysics Data System (ADS)

An efficient Ytterbium-doped fiber laser (YDFL) operating at 1028 nm is demonstrated using a fiber Bragg grating (FBG). The Ytterbium-doped fiber (YDF) is drawn from Yb2O3-doped preform, fabricated through deposition of porous layer of composition SiO2-GeO2 by the MCVD process in conjunction with a solution doping technique. The fabricated YDF has a 0.1 mol % of Yb2O3 in the core, a Ytterbium ion lifetime of 1.1 ms, an absorption of 7.65 dB/m at 976 nm. The fiber laser has the maximum efficiency of 51% with pump power threshold of 19 mW using a FBG in conjunction with a Fresnel reflection to form a linear cavity resonator. The efficiency and threshold are better compared to the similar YDFL configuration using a commercial YDF.

Paul, M. C.; Harun, S. W.; Moghaddam, M. R. A.; Das, S.; Sen, R.; Dhar, A.; Pal, M.; Bhadra, S. K.; Ahmad, H.

2009-05-01

10

21 CFR 137.175 - Phosphated flour.  

... 2014-04-01 false Phosphated flour. 137.175 Section 137.175 ...FOOD FOR HUMAN CONSUMPTION CEREAL FLOURS AND RELATED PRODUCTS Requirements for Specific Standardized Cereal Flours and Related Products § 137.175...

2014-04-01

11

21 CFR 137.175 - Phosphated flour.  

Code of Federal Regulations, 2013 CFR

... 2013-04-01 false Phosphated flour. 137.175 Section 137.175 ...FOOD FOR HUMAN CONSUMPTION CEREAL FLOURS AND RELATED PRODUCTS Requirements for Specific Standardized Cereal Flours and Related Products § 137.175...

2013-04-01

12

21 CFR 137.175 - Phosphated flour.  

Code of Federal Regulations, 2011 CFR

... 2011-04-01 false Phosphated flour. 137.175 Section 137.175 ...FOOD FOR HUMAN CONSUMPTION CEREAL FLOURS AND RELATED PRODUCTS Requirements for Specific Standardized Cereal Flours and Related Products § 137.175...

2011-04-01

13

21 CFR 137.175 - Phosphated flour.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Phosphated flour. 137.175 Section 137.175 ...FOOD FOR HUMAN CONSUMPTION CEREAL FLOURS AND RELATED PRODUCTS Requirements for Specific Standardized Cereal Flours and Related Products § 137.175...

2010-04-01

14

21 CFR 137.175 - Phosphated flour.  

Code of Federal Regulations, 2012 CFR

... 2012-04-01 false Phosphated flour. 137.175 Section 137.175 ...FOOD FOR HUMAN CONSUMPTION CEREAL FLOURS AND RELATED PRODUCTS Requirements for Specific Standardized Cereal Flours and Related Products § 137.175...

2012-04-01

15

25 CFR 175.6 - Information collection.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Information collection. 175.6 Section 175...OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... § 175.6 Information collection. The information collection requirements...

2010-04-01

16

25 CFR 175.6 - Information collection.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Information collection. 175.6 Section 175...OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... § 175.6 Information collection. The information collection requirements...

2011-04-01

17

25 CFR 175.6 - Information collection.  

...2014-04-01 false Information collection. 175.6 Section 175...OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... § 175.6 Information collection. The information collection requirements...

2014-04-01

18

25 CFR 175.6 - Information collection.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Information collection. 175.6 Section 175...OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... § 175.6 Information collection. The information collection requirements...

2013-04-01

19

25 CFR 175.6 - Information collection.  

Code of Federal Regulations, 2012 CFR

...2011-04-01 true Information collection. 175.6 Section 175...OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... § 175.6 Information collection. The information collection requirements...

2012-04-01

20

Discovery of dysprosium, holmium, erbium, thulium and ytterbium isotopes  

E-print Network

Currently, 31 dysprosium, 32 holmium, 32 erbium, 33 thulium and 31 ytterbium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

C. Fry; M. Thoennessen

2012-05-26

21

Toward IFE Oriented Laser Chains: Cryogenically Cooled Ytterbium Doped Materials  

Microsoft Academic Search

With the aim to set up Inertial Fusion Energy (IFE) driver, we develop the properties of the Ytterbium doped materials and the problems met when designing such a system: essentially thermal management and ASE gain depletion. We after present the experimental results obtained using sesquioxide Yb3+ doped ceramics at cryogenic temperature. We also propose a solution for minimizing the ASE

G. Bourdet; O. Casagrande; V. Cardinali; N. Deguil-Robin; B. Le Garrec

2009-01-01

22

Toward IFE Oriented Laser Chains: Cryogenically Cooled Ytterbium Doped Materials  

SciTech Connect

With the aim to set up Inertial Fusion Energy (IFE) driver, we develop the properties of the Ytterbium doped materials and the problems met when designing such a system: essentially thermal management and ASE gain depletion. We after present the experimental results obtained using sesquioxide Yb{sup 3+} doped ceramics at cryogenic temperature. We also propose a solution for minimizing the ASE problem.

Bourdet, G. [LULI, Unite Mixte no 7605 CNRS-CEA-Ecole Polytechnique-Universite Pierre et Marie Curie, Route de Saclay, 91128 Palaiseau (France); Casagrande, O. [Departement des Lasers de Puissance, Centre d'Etudes Scientifiques et Techniques d'Aquitaine (CESTA), Commissariat a l'Energie Atomique BP2, 33114 Le Barp (France); Thales Laser SA, Domaine de Corbeville, Route Departementale 128, BP 46-91401 Orsay Cedex (France); Cardinali, V.; Deguil-Robin, N.; Le Garrec, B. [Departement des Lasers de Puissance, Centre d'Etudes Scientifiques et Techniques d'Aquitaine (CESTA), Commissariat a l'Energie Atomique BP2, 33114 Le Barp (France)

2009-09-27

23

Low frequency noise distributed-feedback ytterbium fibre laser  

SciTech Connect

We report a single-frequency 1-W fibre laser source emitting at 1093 nm, composed of a distributed-feedback ytterbium fibre laser and fibre-optic amplifier. The laser frequency was stabilised by side-locking to a transmission peak of a Fabry - Perot interferometer, and the residual frequency noise spectrum of the laser was measured. Our results indicate that the laser linewidth can be narrowed down below 1 kHz. (lasers)

Nikulin, M A; Babin, S A; Kablukov, S I [Novosibirsk State University, Novosibirsk (Russian Federation); Dmitriev, Aleksandr K; Dychkov, Aleksandr S; Lugovoy, Aleksei A [Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk (Russian Federation); Pecherskii, Yu Ya [Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk (Russian Federation)

2009-10-31

24

Pyrovoltage in ytterbium bisphthalocyanine Langmuir-Blodgett thin films  

Microsoft Academic Search

In investigating the electrical and gas sensing properties of Langmuir-Blodgett (LB) thin films of ytterbium bisphthalocyanine, Yb(pc)(15c), and thermally cycling samples, it has been observed that these samples establish a pyrovoltage. This is similar to an effect observed previously in heat-treated polymeric iron monophthalocyanine [1], although there the effect was measured as a pyrocurrent rather than voltage. A more significant

K. R. Rickwood; D. R. Lovett; B. Lukas; J. SILVERS

1995-01-01

25

33 CFR 175.135 - Existing equipment.  

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2014-07-01

26

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2013 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2013-07-01

27

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2011 CFR

...Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes,...

2011-10-01

28

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2010 CFR

...Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes on...

2010-10-01

29

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2013 CFR

...Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes,...

2013-10-01

30

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2012 CFR

...Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes,...

2012-10-01

31

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2011 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2011-07-01

32

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2010 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2010-07-01

33

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2012 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2012-07-01

34

50 CFR 17.5 - Alaska natives.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Alaska natives. 17.5 Section 17.5 ...Introduction and General Provisions § 17.5 Alaska natives. (a) The provisions...is an Alaskan native and who resides in Alaska; or (2) Any non-native...

2013-10-01

35

50 CFR 17.5 - Alaska natives.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Alaska natives. 17.5 Section 17.5 ...Introduction and General Provisions § 17.5 Alaska natives. (a) The provisions...is an Alaskan native and who resides in Alaska; or (2) Any non-native...

2010-10-01

36

50 CFR 17.5 - Alaska natives.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Alaska natives. 17.5 Section 17.5 ...Introduction and General Provisions § 17.5 Alaska natives. (a) The provisions...is an Alaskan native and who resides in Alaska; or (2) Any non-native...

2012-10-01

37

50 CFR 17.5 - Alaska natives.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Alaska natives. 17.5 Section 17.5 ...Introduction and General Provisions § 17.5 Alaska natives. (a) The provisions...is an Alaskan native and who resides in Alaska; or (2) Any non-native...

2011-10-01

38

33 CFR 117.175 - Mokelumne River.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Mokelumne River. 117.175 Section 117.175 Navigation... California § 117.175 Mokelumne River. (a) The draw of the California...Transportation highway bridge, the Mokelumne River Bridge, mile 3.0, at East...

2010-07-01

39

33 CFR 117.175 - Mokelumne River.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Mokelumne River. 117.175 Section 117.175 Navigation... California § 117.175 Mokelumne River. (a) The draw of the California...Transportation highway bridge, the Mokelumne River Bridge, mile 3.0, at East...

2011-07-01

40

33 CFR 117.175 - Mokelumne River.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Mokelumne River. 117.175 Section 117.175 Navigation... California § 117.175 Mokelumne River. (a) The draw of the California...Transportation highway bridge, the Mokelumne River Bridge, mile 3.0, at East...

2012-07-01

41

Time-resolved photoluminescence of ytterbium in indium phosphide. Master's thesis  

SciTech Connect

Time-resolved photoluminescence of ytterbium (Yb) implanted in indium phosphide (Inp) was the primary emphasis of this research. The decay lifetimes of the 1002-nm Yb emission were investigated as a function of temperature. Initial attempts were made to investigate as a function of temperature. Initial attempts were made to investigate aluminum gallium arsenide (AlGaAs) implanted with ytterbium.

Bumgarner, T.F.

1988-12-01

42

Time-resolved near-IR luminescence from ytterbium and neodymium complexes of the Lehn cryptand  

Microsoft Academic Search

The Lehn cryptand has been widely applied to the study and application of luminescent lanthanide ions. We have demonstrated that the ytterbium and neodymium complexes are also luminescent. The luminescence lifetimes of the ytterbium complex fit well to established models for determining the number of inner sphere water molecules. By contrast, the neodymium complex exhibits unusually long lifetimes in aqueous

Stephen Faulkner; Andrew Beeby; Marie-Christine Carrié; Anjum Dadabhoy; Alan M. Kenwright; Peter G. Sammes

2001-01-01

43

Luminescence and photoinduced absorption in ytterbium-doped optical fibres  

SciTech Connect

Photochemical reactions induced in the glass network of an ytterbium-doped fibre core by IR laser pumping and UV irradiation have been investigated by analysing absorption and luminescence spectra. We have performed comparative studies of the photoinduced absorption and luminescence spectra of fibre preforms differing in core glass composition: Al{sub 2}O{sub 3} : SiO{sub 2}, Al{sub 2}O{sub 3} : Yb{sub 2}O{sub 3} : SiO{sub 2}, and P{sub 2}O{sub 5} : Yb{sub 2}O{sub 3} : SiO{sub 2}. The UV absorption spectra of unirradiated preform core samples show strong bands peaking at 5.1 and 6.5 eV, whose excitation plays a key role in photoinduced colour centre generation in the glass network. 'Direct' UV excitation of the 5.1- and 6.5-eV absorption bands at 244 and 193 nm leads to the reduction of some of the Yb{sup 3+} ions to Yb{sup 2+}. The photodarkening of ytterbium-doped fibres by IR pumping is shown to result from oxygen hole centre generation. A phenomenological model is proposed for the IR-pumping-induced photodarkening of ytterbium-doped fibres. The model predicts that colour centre generation in the core glass network and the associated absorption in the visible range result from a cooperative effect involving simultaneous excitation of a cluster composed of several closely spaced Yb{sup 3+} ions.

Rybaltovsky, A A; Aleshkina, S S; Likhachev, M E; Bubnov, M M; Umnikov, A A; Yashkov, M V; Gur'yanov, Aleksei N; Dianov, Evgenii M

2011-12-31

44

Atomic Mass and Nuclear Binding Energy for Yb-171 (Ytterbium)  

NASA Astrophysics Data System (ADS)

This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Yb-171 (Ytterbium, atomic number Z = 70, mass number A = 171).

Sukhoruchkin, S. I.; Soroko, Z. N.

45

Ytterbium Clusters in Fluorite CaF{sub 2}  

SciTech Connect

The crystal structure of the ytterbium hexameric cluster in CaF{sub 2} has been calculated in the framework of the embedded--cluster method within the shell model, in pair potential approximation. The crystal field parameters and scheme of the energy levels for Yb{sub 6}F{sub 36} hexameric cluster were calculated in the exchange charges model. Also, the optical spectra of Yb{sup 3+} single center in CaF{sub 2}(cubic and tetragonal symmetry) was calculated and discussed.

Nikiforov, Anatoliy E.; Chernyshev, Vladimir A.; Volodin, Vasiliy P. [Ural State University, 620083, Lenin av. 51, Ekaterinburg (Russian Federation); Avram, Nicolae M. [West University of Timisoara, 300223, Bd. Parvan No. 4, Timisoara (Romania); Academy of Romanian Scientist, Sp. Independentei Nr. 54, 050094 Bucharest (Romania); Avram, Calin N. [West University of Timisoara, 300223, Bd. Parvan No. 4, Timisoara (Romania)

2009-05-22

46

Atomic Mass and Nuclear Binding Energy for Yb-227 (Ytterbium)  

NASA Astrophysics Data System (ADS)

This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Yb-227 (Ytterbium, atomic number Z = 70, mass number A = 227).

Sukhoruchkin, S. I.; Soroko, Z. N.

47

High power ytterbium-doped fiber lasers — fundamentals and applications  

NASA Astrophysics Data System (ADS)

In this paper, we summarize the fundamental properties and review the latest developments in high power ytterbium-doped fiber (YDF) lasers. The review is focused primarily on the main fiber laser configurations and the related cladding pumping issues. Special attention is placed on pump combination techniques and the parameters that affect the brightness enhancements observed in high power fiber lasers. The review also includes the major limitations imposed by fiber nonlinearities and other parasitic effects, such as optical damage, modal instabilities and photodarkening. The paper summarizes the power evolution in continuous-wave (CW) and pulsed YDF lasers and their impact on material processing and other industrial applications.

Zervas, Michalis N.

2014-03-01

48

Paramagnetic Faraday rotation with spin-polarized ytterbium atoms  

E-print Network

We report observation of the paramagnetic Faraday rotation of spin-polarized ytterbium (Yb) atoms. As the atomic samples, we used an atomic beam, released atoms from a magneto-optical trap (MOT), and trapped atoms in a far-off-resonant trap (FORT). Since Yb is diamagnetic and includes a spin-1/2 isotope, it is an ideal sample for the spin physics, such as quantum non-demolition measurement of spin (spin QND), for example. From the results of the rotation angle, we confirmed that the atoms were almost perfectly polarized.

M. Takeuchi; T. Takano; S. Ichihara; Y. Takasu; M. Kumakura; T. Yabuzaki; Y. Takahashi

2005-12-07

49

Synthesis of ytterbium bisphthalocyanines: Photophysicochemical properties and nonlinear absorption behavior  

NASA Astrophysics Data System (ADS)

Herein we report on the syntheses, photophysico-chemical properties and nonlinear absorption parameters of bis-{1(4), 8(11), 15(18), 22(25)-(tetrapyridin-2-yloxy phthalocyaninato)} ytterbium (III) (3) and bis-{1(4), 8(11), 15(18), 22(25)-(tetrapyridin-4-yloxy phthalocyaninato)} ytterbium (III) (4). The fluorescence and singlet oxygen quantum yields obtained for complexes 3 and 4 are low. The triplet quantum yield obtained for complex 3 is high at ?T = 0.89 whereas for complex 4?T = 0.48. The third order optical susceptibility values are of the order: 10-11 esu (for complex 3), and 10-13 esu (for complex 4) while the hyperpolarizability values are of the order: 10-28 esu (for complex 3) and 10-31 esu (for complex 4). Complexes 3 and 4 show two-photon absorption coefficients of the order of 10-46 cm4 s/photon and 10-48 cm4 s/photon, and threshold intensities as low as 0.3 J cm-2 and 0.0045 J cm-2, respectively.

Sekhosana, Kutloano E.; Nyokong, Tebello

2014-11-01

50

Simultaneous Optical Trapping of Lithium and Ytterbium Atoms  

NASA Astrophysics Data System (ADS)

Simultaneous trapping of different atomic species forms the starting point for experiments probing strong interactions and aspects of superfluidity in mass-imbalanced ultracold mixtures, as well as the synthesis of dipolar molecules through interspecies scattering resonances. Our choice of lithium (Li) and ytterbium (Yb) atoms as the two constituent species is based on several reasons. Both Li and Yb possess stable bosonic and fermionic isotopes which have previously been brought to quantum degeneracy in separate single-species experiments. Li is a one-electron atom and Yb is a two-electron atom, allowing species-selective trapping techniques using external magnetic fields are realizable, magnetic trapping of diatomic molecules of LiYb, and a large electric dipole moment in the molecular ground state allowing for studies of strongly dipolar gases. Ultracold polar LiYb is also a promising candidate for a sensitive electron EDM measurement. We have achieved simultaneous magneto-optical trapping of lithium and ytterbium atoms by loading from Zeeman slowed atomic beams from two separate beamlines. We will report on our experimental setup and latest experiments on trapping and cooling of both species in a far off resonance optical trap.

Hansen, Anders; Khramov, Alexander; Dowd, William; Ivanov, Vladyslav; Gupta, Subhadeep

2010-03-01

51

Simultaneous Optical Trapping of Lithium and Ytterbium Atoms  

NASA Astrophysics Data System (ADS)

Simultaneous trapping of different atomic species forms the starting point for experiments probing strong interactions and aspects of superfluidity in mass-imbalanced ultracold mixtures, as well as the synthesis of dipolar molecules through interspecies scattering resonances. Our choice of lithium (Li) and ytterbium (Yb) atoms as the two constituent species is based on several reasons. Both Li and Yb possess stable bosonic and fermionic isotopes which can be independently brought to quantum degeneracy. Li is a one-electron atom and Yb is a two-electron atom, allowing the use of species-selective trapping methods with magnetic fields, magnetic trapping of diatomic LiYb molecules, and a large molecular electric dipole moment for studies of strongly dipolar gases. Ultracold polar LiYb is also a promising candidate for a sensitive electron electric dipole moment (EDM) measurement. We have achieved simultaneous magneto-optical trapping of lithium and ytterbium atoms by loading Zeeman slowed atomic beams from two separate beamlines. We will report on our experimental setup and latest experiments on trapping and cooling of both species in a far off resonance optical trap.

Ivanov, Vladyslav; Khramov, Alexander; Hansen, Anders; Dowd, William; Gupta, Subhadeep

2010-03-01

52

49 CFR 175.705 - Radioactive contamination.  

...2014-10-01 2014-10-01 false Radioactive contamination. 175.705 Section...Classification of Material § 175.705 Radioactive contamination. (a) A carrier...contact by any person with Class 7 (radioactive) materials that may have been...

2014-10-01

53

33 CFR 175.115 - Exceptions.  

Code of Federal Regulations, 2012 CFR

...signals suitable for night use, selected from the list in § 175.130 or § 175.135, in the number required, between sunset and sunrise: (a) A person competing in any organized marine parade, regatta, race, or similar event; (b) A person using...

2012-07-01

54

33 CFR 175.115 - Exceptions.  

Code of Federal Regulations, 2011 CFR

...signals suitable for night use, selected from the list in § 175.130 or § 175.135, in the number required, between sunset and sunrise: (a) A person competing in any organized marine parade, regatta, race, or similar event; (b) A person using...

2011-07-01

55

Ytterbium Trichloride-Catalyzed Diels-Alder Reactions of Unactivated Dienes  

Microsoft Academic Search

Ytterbium chloride (YbCl3) is an effective and reusable catalyst for Diels-Alder reactions of unactivated dienes with ?,?-unsaturated ketones and aldehydes at room temperature, leading to products with high regio- and stereoselectivities.

Xinggao Fang; Benjamin P. Warner; John G. Watkin

2000-01-01

56

Samarium- and ytterbium-promoted oxidation of silicon and gallium arsenide surfaces  

SciTech Connect

A method is described for promoting oxidation of a silicon or gallium arsenide surface comprising: depositing a ytterbium overlayer on the silicon or gallium arsenide surface prior to the oxidation of the surface.

Franciosi, A.

1989-02-21

57

Passively Q-switched Ytterbium and Chromium all-fibre laser  

E-print Network

A chromium-doped saturable absorber fibre stabilizes an otherwise spontaneously chaotic ytterbium- doped fibre laser. This original passively Q-switched all-fibre laser produces sustained and stable trains of smooth pulses at high repetition rate.

Dussardier, Bernard; Peterka, Pavel

2012-01-01

58

Near-infrared emitting ytterbium metal-organic frameworks with tunable excitation properties.  

PubMed

The design of metal-organic frameworks (MOFs) incorporating near-infrared emitting ytterbium cations and organic sensitizers allows for the preparation of new materials with tunable and enhanced photophysical properties. PMID:19617965

White, Kiley A; Chengelis, Demetra A; Zeller, Matthias; Geib, Steven J; Szakos, Jessica; Petoud, Stéphane; Rosi, Nathaniel L

2009-08-14

59

Photonic bandgap single-mode optical fibre with ytterbium-doped silica glass core  

SciTech Connect

A photonic bandgap fibre with an ytterbium-doped silica glass core is fabricated and investigated. The possibility of implementing single-mode operation of such fibres in a wide spectral range at a large (above 20 {mu}m) mode field diameter makes them promising for fibre lasers and amplifiers. To ensure a high quality of the beam emerging from the fibre, particular attention is paid to increasing the optical homogeneity of the ytterbium-doped core glass. (optical fibres)

Egorova, O N; Semenov, S L; Vel'miskin, V V; Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation); Salganskii, M Yu; Yashkov, M V; Gur'yanov, Aleksei N [Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation)

2011-01-24

60

Structural and Electronic Transitions in Ytterbium Metal to 202 GPa  

SciTech Connect

Ytterbium (Yb), a member of the rare earth group metals with a filled f shell and a divalent electronic character, has been studied under static high pressures in a diamond anvil cell to 202thinspthinspGPa. We report a new transformation from a face-centered-cubic structure to a hexagonal phase with 3thinspthinspatoms/cell (space group P3{sub 1}21 referred to as hP3 ) at 98{plus_minus}5 GPa . This hP3 phase is similar to that observed in trivalent neodymium and samarium at pressures near 40thinspthinspGPa. Our high pressure study thus clearly demonstrates that Yb is no longer an {open_quotes}irregular{close_quotes} member of the rare earth metals, and divalent to trivalent electronic transition is completed at megabar pressures. {copyright} {ital 1999} {ital The American Physical Society}

Chesnut, G.N.; Vohra, Y.K. [Department of Physics, University of Alabama at Birmingham (UAB), Birmingham, Alabama 35294-1170 (United States)] [Department of Physics, University of Alabama at Birmingham (UAB), Birmingham, Alabama 35294-1170 (United States)

1999-02-01

61

Atomic layer deposition for fabrication of ytterbium doped fibers  

NASA Astrophysics Data System (ADS)

Atomic layer deposition (ALD) was used to fabricate an ytterbium (Yb)-doped silica fiber in combination with the conventional modified chemical vapor deposition (MCVD) method. An MCVD soot-preform with a porous layer of SiO2 doped with GeO2 was coated with layers of Yb2O3 and Al2O3 prior to sintering, using the ALD method. ALD is a surface controlled CVD-type process enabling thin film deposition over large substrates with good thickness control, uniformity and high conformality. A materials analysis study showed that the dopants successfully penetrated the full thickness of 320 ?m of the soot layer. Preliminary preform and fiber experiments on refractive index profiles, background losses, lifetime and the characteristic gain-loss curve were performed demonstrating the potential of this method for fabricating Yb-doped fibers with high concentration of dopants.

Montiel i Ponsoda, Joan J.; Norin, Lars; Bosund, Markus; Ye, Changgeng; Söderlund, Mikko J.; Tervonen, Ari; Honkanen, Seppo

2012-02-01

62

Systematic Shifts for Ytterbium-ion Optical Frequency Standards  

E-print Network

The projected systematic uncertainties of single trapped Ytterbium-ion optical frequency standards are estimated for the quadrupole and octupole transitions which are at wavelengths 435.5 nm and 467 nm, respectively. Finite temperature of the ion and its interaction with the external fields introduce drift in the measured frequency compared to its absolute value. Frequency shifts due to electric quadrupole moment, induced polarization and excess micromotion of the ion depend on electric fields, which are estimated in this article. Geometry of the trap electrodes also result in unwanted electric fields which have been considered in our calculation. Magnetic field induced shift and Stark shifts due to electro-magnetic radiation at a surrounding temperature are also estimated. At CSIR-NPL, we are developing a frequency standard based on the octupole transition for which the systematic uncertainties are an order of magnitude smaller than that using the quadrupole transition, as described here.

Batra, N; Gupta, A Sen; Singh, Sukhjit; Arora, Amisha; Arora, Bindiya

2014-01-01

63

Thermal bleaching of photodarkening in ytterbium-doped fibers  

NASA Astrophysics Data System (ADS)

We study thermal bleaching of photodarkening-induced loss in ytterbium-doped fibers. Post-irradiation heating of a photodarkened fiber is shown to result in further increase the loss which is attributed to both a permanent increase of loss-inducing color centers and a temperature-dependent broadening of the absorption spectrum. The permanent heat-induced increase of loss is believed to indicate presence of an intermediate energy state in the NIRpho tochemical mechanism for photodarkening. Further, we apply the demarcation energy curve approach to derive the thermal activation energy of the induced defects. For the studied commercial 20-?m-core-diameter LMA fiber, the energy distribution consists of a single peak, located at 1.3 eV with a FWHM of 0.31 eV.

Söderlund, Mikko J.; Montiel i Ponsoda, Joan J.; Koplow, Jeffrey P.; Honkanen, Seppo

2010-02-01

64

High gain ytterbium doped Ge pedestal large pitch fiber  

NASA Astrophysics Data System (ADS)

Large mode area rod-type fibers have enabled amplification of ultra-short pulses to mJ pulse energy and MW peak powers. For very large mode field areas, fibers have to be designed as rigid rods with typical fiber lengths of around 1 m for efficient operation. A shorter fiber length can be desirable to reduce the packaging size of commercial systems and to decrease the impact of parasitic nonlinear effects for peakpower scaling. The fiber design presented here is based on a modified large-pitch fiber with an effectively higher ytterbium concentration in the fiber core. To achieve index matching the cladding index needs to be changed. In this contribution we propose to co-dope the passive host material with germanium to match both indices and to obtain a higher Yb-concentration within the active core. Compared to standard LPF, where the core index is reduced by co-doping the core with Flourine, the ytterbium doping concentration of this novel germanium-pedestal LPF is doubled. A detailed numerical and experimental investigation shows that with short fiber lengths <40cm is feasible to achieve output powers beyond 100W with 10W seed. Significantly higher gains, of nearly 30 dB, can be achieved for fiber lengths in the order of 60cm. A similar gain can be expected in a conventional LPF with 1.20 m length. In conclusion, we demonstrate a fiber design for significantly enhanced energy storage per fiber length and improved pump absorption. This concept will notably reduce the footprint of ultra-short fiber laser systems.

Gaida, Christian; Stutzki, Fabian; Jansen, Florian; Otto, Hans-Jürgen; Eidam, Tino; Jauregui, Cesar; Limpert, Jens; Tünnermann, Andreas

2014-03-01

65

40 CFR 96.175 - Petitions.  

Code of Federal Regulations, 2012 CFR

40 Protection of Environment 22 2012-07-01...175 Protection of Environment ENVIRONMENTAL PROTECTION...that is subject to an Acid Rain emissions limitation...is not subject to an Acid Rain emissions...

2012-07-01

66

40 CFR 161.175 - Certified limits.  

Code of Federal Regulations, 2010 CFR

...CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements § 161.175 Certified...d) Special cases. If the Agency finds unacceptable any certified...

2010-07-01

67

25 CFR 175.30 - Billing.  

Code of Federal Regulations, 2010 CFR

...30 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.30 Billing. (a) Metered customers. The utility...

2010-04-01

68

25 CFR 175.30 - Billing.  

...30 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.30 Billing. (a) Metered customers. The utility...

2014-04-01

69

25 CFR 175.30 - Billing.  

Code of Federal Regulations, 2012 CFR

...30 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.30 Billing. (a) Metered customers. The utility...

2012-04-01

70

25 CFR 175.30 - Billing.  

Code of Federal Regulations, 2011 CFR

...30 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.30 Billing. (a) Metered customers. The utility...

2011-04-01

71

7 CFR 1.75 - General stipulations.  

...REGULATIONS Cooperative Production of Television Films § 1.75 General stipulations. In requesting...agreement will be reached upon story, script and film treatment with the Department before film production is...

2014-01-01

72

7 CFR 1.75 - General stipulations.  

Code of Federal Regulations, 2011 CFR

...REGULATIONS Cooperative Production of Television Films § 1.75 General stipulations. In requesting...agreement will be reached upon story, script and film treatment with the Department before film production is...

2011-01-01

73

7 CFR 1.75 - General stipulations.  

Code of Federal Regulations, 2012 CFR

...REGULATIONS Cooperative Production of Television Films § 1.75 General stipulations. In requesting...agreement will be reached upon story, script and film treatment with the Department before film production is...

2012-01-01

74

7 CFR 1.75 - General stipulations.  

Code of Federal Regulations, 2010 CFR

...REGULATIONS Cooperative Production of Television Films § 1.75 General stipulations. In requesting...agreement will be reached upon story, script and film treatment with the Department before film production is...

2010-01-01

75

7 CFR 1.75 - General stipulations.  

Code of Federal Regulations, 2013 CFR

...REGULATIONS Cooperative Production of Television Films § 1.75 General stipulations. In requesting...agreement will be reached upon story, script and film treatment with the Department before film production is...

2013-01-01

76

7 CFR 1726.175 - General plant materials.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false General plant materials. 1726.175 Section 1726.175 ...SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant materials. This section covers items...

2010-01-01

77

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2012 CFR

...2011-04-01 true Revenues collected from power operations. 175.10 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10...

2012-04-01

78

25 CFR 175.10 - Revenues collected from power operations.  

...2014-04-01 false Revenues collected from power operations. 175.10 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10...

2014-04-01

79

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Revenues collected from power operations. 175.10 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10...

2013-04-01

80

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Revenues collected from power operations. 175.10 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10...

2011-04-01

81

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2012 CFR

...be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the...

2012-10-01

82

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2011 CFR

...be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the...

2011-10-01

83

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2010 CFR

...be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the...

2010-10-01

84

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2013 CFR

...be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the...

2013-10-01

85

40 CFR 17.5 - Eligibility of applicants.  

Code of Federal Regulations, 2013 CFR

...Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5...

2013-07-01

86

40 CFR 17.5 - Eligibility of applicants.  

Code of Federal Regulations, 2011 CFR

...Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5...

2011-07-01

87

40 CFR 17.5 - Eligibility of applicants.  

Code of Federal Regulations, 2010 CFR

...Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5...

2010-07-01

88

40 CFR 17.5 - Eligibility of applicants.  

Code of Federal Regulations, 2012 CFR

...Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5...

2012-07-01

89

7 CFR 1726.175 - General plant materials.  

...2014-01-01 2014-01-01 false General plant materials. 1726.175 Section 1726.175 ...SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant materials. This section covers items...

2014-01-01

90

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Revenues collected from power operations. 175.10 Section 175.10 ...THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues...

2010-04-01

91

7 CFR 1726.175 - General plant materials.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false General plant materials. 1726.175 Section 1726.175 ...SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant materials. This section covers items...

2011-01-01

92

Quantum Frequency Conversion for Ytterbium Ion Based Quantum Repeaters  

NASA Astrophysics Data System (ADS)

Quantum key distribution systems represent a proven method to obtain fundamentally secure communication channels. However, the loss of entangled photons which create the encryption key limit the distance over which the systems are useful. Quantum repeaters have been used to increase the distance over which entangled photons can be transmitted. The most successful quantum repeaters entangle information between trapped ions and single photons and through the use of entanglement swapping protocols, relay the encryption keys over large distances. A requirement of these quantum repeaters is the ability to work in the telecom wavelengths (1310 nm or 1550 nm), where standard silica fibers exhibit low loss. With the majority of ions emitting in the ultraviolet and visible spectrum, and ytterbium in particular emitting at 369.5 nm, a conversion process is then needed that can translate the photons from 369.5 nm to the telecom band while preserving the entangled state. The experiment presented here details the first stage of a nonlinear frequency conversion setup that uses strong pump light to enable the conversion of 369.5 nm photons to 708 nm. The efficiency of the conversion process is analyzed to determine the optimum system parameters, with an initial single pass conversion efficiency of 0.20% achieved. Noise introduced during the nonlinear conversion process is examined to determine the effect it presents on the communication channel.

Clark, Ryan A.

93

Ytterbium-doped fibers fabricated with atomic layer deposition method.  

PubMed

We report on a new fabrication method of producing ytterbium doped fibers by atomic layer deposition (ALD) in combination with the conventional modified chemical vapor deposition (MCVD) technique. An MCVD soot-preform with a porous layer of SiO(2) is coated with layers of Yb(2)O(3) and Al(2)O(3) prior to sintering, using the gas-phase ALD method. An SEM/EDS material analysis study shows that the dopants successfully penetrate the full thickness of 320 µm of the soot layer. An Yb-doped fiber fabricated by this technique shows a background attenuation of 20 dB/km, a uniform longitudinal Yb-doping profile, and good laser characteristics with a slope efficiency of 80%. Furthermore, we present a comparison in terms of photodarkening between the MCVD-ALD fiber and a solution doped fiber, fabricated with the same MCVD recipe. The new MCVD-ALD fiber appears to be more photodarkening resistant. PMID:23187275

Montiel i Ponsoda, Joan J; Norin, Lars; Ye, Changgeng; Bosund, Markus; Söderlund, Mikko J; Tervonen, Ari; Honkanen, Seppo

2012-10-22

94

ECS175: Computer Graphics Practice Midterm  

E-print Network

ECS175: Computer Graphics Practice Midterm Please write your answers ON THESE SHEETS. Attach extra sheets if necessary. The size of the space indicates roughly the size of the answer we are expecting. 1-system describing the growth of the vine. Be sure to say how the symbols you use correspond to the leaves, stems

California at Davis, University of

95

33 CFR 175.17 - Exemptions.  

Code of Federal Regulations, 2011 CFR

...exempted from the requirements for carriage of the additional Type IV PFD required under § 175.15(b). (c) Racing shells, rowing sculls, racing canoes and racing kayaks are exempted from the requirements for carriage of any Type PFD required under §...

2011-07-01

96

33 CFR 175.17 - Exemptions.  

Code of Federal Regulations, 2012 CFR

...exempted from the requirements for carriage of the additional Type IV PFD required under § 175.15(b). (c) Racing shells, rowing sculls, racing canoes and racing kayaks are exempted from the requirements for carriage of any Type PFD required under §...

2012-07-01

97

33 CFR 175.17 - Exemptions.  

Code of Federal Regulations, 2013 CFR

...exempted from the requirements for carriage of the additional Type IV PFD required under § 175.15(b). (c) Racing shells, rowing sculls, racing canoes and racing kayaks are exempted from the requirements for carriage of any Type PFD required under §...

2013-07-01

98

33 CFR 175.17 - Exemptions.  

Code of Federal Regulations, 2010 CFR

...exempted from the requirements for carriage of the additional Type IV PFD required under § 175.15(b). (c) Racing shells, rowing sculls, racing canoes and racing kayaks are exempted from the requirements for carriage of any Type PFD required under §...

2010-07-01

99

SEARCH FOR NEW YTTERBIUM-BASED HEAVY FERMION COMPOUNDS D. Bollinger, E. Morosan1  

E-print Network

TT'(T=Rh, Pd, Ir and T'=Ge, Sn, Bi). X-ray measurements were then done in Physics and Astronomy and Chemistry at Rice University #12;SEARCH FOR NEW YTTERBIUM-BASED HEAVY FERMION COMPOUNDS http://nanojapan.rice.edu This material is based upon work supported

Mellor-Crummey, John

100

Friedel–Crafts Acylation of Ferrocene Catalyzed by Immobilized Ytterbium(III) Triflate in Ionic Liquid  

Microsoft Academic Search

Ytterbium triflate [Yb(OTf)3]–catalyzed Friedel–Crafts acylation of ferrocene with anhydrides or acyl chlorides in n?butylpyridinium tetrafluoroborate (BPyBF4) ionic liquid proceeded smoothly under mild conditions. The immobilized catalytic system (solvent\\/catalyst) was easily recovered and reused without any loss of activity. Chemoselective monoacylferrocenes were obtained in high yields by this catalytic system.

Jianjun Li; Weike Su; Jingdu Lin; Mei Chen; Jia Li

2005-01-01

101

Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping.  

PubMed

We show that the photodarkening resistivity of ytterbium-doped fiber lasers can be greatly improved by cerium codoping. It is suggested that the coexistence of the redox couple Ce(3+)/Ce(4+) in the glass provides means for trapping both hole- and electron-related color centers that are responsible for the induced optical losses in Yb-doped fiber lasers. PMID:19370145

Engholm, M; Jelger, P; Laurell, F; Norin, L

2009-04-15

102

SOLITONS AND OPTICAL FIBERS: Self-Q-switched ytterbium-doped cladding-pumped fibre laser  

NASA Astrophysics Data System (ADS)

A self-Q-switched ytterbium-doped double-clad fibre laser is described. A samarium-doped fibre is used as a filter for protecting a pump source. A fibre coupler is employed to obtain a nonlinear feedback. The mechanism of pulse formation in the laser is considered, and the dependence of its output pulse on the coupler parameters is studied.

Grukh, Dmitrii A.; Kurkov, Andrei S.; Razdobreev, I. M.; Fotiadi, A. A.

2002-11-01

103

Passively Q-Switched Ytterbium-and Chromium-doped All-Fiber Laser  

E-print Network

Passively Q-Switched Ytterbium- and Chromium-doped All-Fiber Laser Bernard Dussardier,1,* Jérôme, v.v.i., 182 51 Prague, Czech Republic * Corresponding author: bernard.dussardier@unice.fr A chromium time proposed a core-pumped, low power, all-fiber PQS laser [5] using a newly developed chromium

Paris-Sud XI, Université de

104

Coherent combination of two ytterbium fiber amplifier based on an active segmented mirror  

Microsoft Academic Search

To control the phase noise of two ytterbium fiber amplifiers, a coherent combination system based on an active segmented mirror (ASM) has been established in our laboratory. The ASM is controlled by a feed back control loop on the basis of a Peak Rate (PR) algorithm which is realized on a DSP+FPGA hardware control board. Experimental results indicate that when

Ping Yang; Ruofu Yang; Feng Shen; Xinyang Li; Wenhan Jiang

2009-01-01

105

Simultaneous measurement of thermal lens and temperature map in ytterbium-doped fluoride crystals  

E-print Network

Simultaneous measurement of thermal lens and temperature map in ytterbium-doped fluoride crystals J attractive properties including a weak quantum defect, and no problem of concentration quenching. Fluoride crystals, having the cubic Calcium fluoride structure, are well-known to be transparent in a large

Paris-Sud XI, Université de

106

10 CFR 52.175 - Transfer of manufacturing license.  

...Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing license may...

2014-01-01

107

10 CFR 52.175 - Transfer of manufacturing license.  

Code of Federal Regulations, 2011 CFR

...Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing license may...

2011-01-01

108

10 CFR 52.175 - Transfer of manufacturing license.  

Code of Federal Regulations, 2012 CFR

...Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing license may...

2012-01-01

109

10 CFR 52.175 - Transfer of manufacturing license.  

Code of Federal Regulations, 2013 CFR

...Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing license may...

2013-01-01

110

18 CFR 367.1750 - Account 175, Derivative instrument assets.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Account 175, Derivative instrument assets. 367.1750...Assets § 367.1750 Account 175, Derivative instrument assets. This account must include the amounts paid for derivative instruments, and the change...

2013-04-01

111

18 CFR 367.1750 - Account 175, Derivative instrument assets.  

...2014-04-01 false Account 175, Derivative instrument assets. 367.1750...Assets § 367.1750 Account 175, Derivative instrument assets. This account must include the amounts paid for derivative instruments, and the change...

2014-04-01

112

18 CFR 367.1750 - Account 175, Derivative instrument assets.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Account 175, Derivative instrument assets. 367.1750...Assets § 367.1750 Account 175, Derivative instrument assets. This account must include the amounts paid for derivative instruments, and the change...

2011-04-01

113

47 CFR 90.175 - Frequency coordinator requirements.  

Code of Federal Regulations, 2013 CFR

...5 2013-10-01 2013-10-01 false Frequency coordinator requirements. 90.175 Section...SERVICES Policies Governing the Assignment of Frequencies § 90.175 Frequency coordinator requirements. Except for...

2013-10-01

114

47 CFR 90.175 - Frequency coordinator requirements.  

Code of Federal Regulations, 2011 CFR

...5 2011-10-01 2011-10-01 false Frequency coordinator requirements. 90.175 Section...SERVICES Policies Governing the Assignment of Frequencies § 90.175 Frequency coordinator requirements. Except for...

2011-10-01

115

47 CFR 90.175 - Frequency coordinator requirements.  

Code of Federal Regulations, 2012 CFR

...5 2012-10-01 2012-10-01 false Frequency coordinator requirements. 90.175 Section...SERVICES Policies Governing the Assignment of Frequencies § 90.175 Frequency coordinator requirements. Except for...

2012-10-01

116

27 CFR 53.175 - Readjustment for local advertising charges.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Readjustment for local advertising charges. 53.175 Section 53... § 53.175 Readjustment for local advertising charges. (a) In general...reimbursement of expenses for local advertising of the article or any other...

2011-04-01

117

27 CFR 53.175 - Readjustment for local advertising charges.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Readjustment for local advertising charges. 53.175 Section 53... § 53.175 Readjustment for local advertising charges. (a) In general...reimbursement of expenses for local advertising of the article or any other...

2010-04-01

118

27 CFR 53.175 - Readjustment for local advertising charges.  

...2014-04-01 false Readjustment for local advertising charges. 53.175 Section 53... § 53.175 Readjustment for local advertising charges. (a) In general...reimbursement of expenses for local advertising of the article or any other...

2014-04-01

119

27 CFR 53.175 - Readjustment for local advertising charges.  

Code of Federal Regulations, 2012 CFR

...2011-04-01 true Readjustment for local advertising charges. 53.175 Section 53... § 53.175 Readjustment for local advertising charges. (a) In general...reimbursement of expenses for local advertising of the article or any other...

2012-04-01

120

27 CFR 53.175 - Readjustment for local advertising charges.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Readjustment for local advertising charges. 53.175 Section 53... § 53.175 Readjustment for local advertising charges. (a) In general...reimbursement of expenses for local advertising of the article or any other...

2013-04-01

121

21 CFR 133.175 - Pasteurized cheese spread.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Pasteurized cheese spread. 133.175 Section 133.175 Food and...SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific...

2010-04-01

122

Highly efficient cladding-pumped fibre laser based on an ytterbium-doped optical fibre and a fibre Bragg grating  

SciTech Connect

Ytterbium-ion-doped double-clad optical fibres were developed. The differential quantum efficiency of a diode-pumped fibre laser, fabricated on the basis of such optical fibres with a fibre Bragg grating, was 90%. (lasers)

Kurkov, Andrei S; Karpov, V I; Medvedkov, O I; Dianov, Evgenii M; Vasil'ev, Sergei A; Paramonov, Vladimir M; Protopopov, V N [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation); Laptev, A Yu; Gur'yanov, A N; Umnikov, A A; Vechkanov, N I [Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation); Artyushenko, V G; Frahm, J [Advanced Photonic Systems, APhS GmbH, Berlin (Germany)

1999-06-30

123

Highly efficient cladding-pumped fibre laser based on an ytterbium-doped optical fibre and a fibre Bragg grating  

Microsoft Academic Search

Ytterbium-ion-doped double-clad optical fibres were developed. The differential quantum efficiency of a diode-pumped fibre laser, fabricated on the basis of such optical fibres with a fibre Bragg grating, was 90%. (lasers)

Andrei S Kurkov; V I Karpov; O I Medvedkov; Evgenii M Dianov; Sergei A Vasilev; Vladimir M Paramonov; V N Protopopov; A Yu Laptev; A N Guryanov; A A Umnikov; N I Vechkanov; V G Artyushenko; J Frahm

1999-01-01

124

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270...Components of Coatings § 175.270 Poly(vinyl fluoride) resins. Poly(vinyl fluoride) resins identified in this section...

2013-04-01

125

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

...2014-04-01 2014-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270...Components of Coatings § 175.270 Poly(vinyl fluoride) resins. Poly(vinyl fluoride) resins identified in this section...

2014-04-01

126

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 2011-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270...Components of Coatings § 175.270 Poly(vinyl fluoride) resins. Poly(vinyl fluoride) resins identified in this section...

2011-04-01

127

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 2012-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270...Components of Coatings § 175.270 Poly(vinyl fluoride) resins. Poly(vinyl fluoride) resins identified in this section...

2012-04-01

128

Ytterbium fibre laser with a heavily Yb{sup 3+}-doped glass fibre core  

SciTech Connect

The use of optical fibres with a high concentration of active ions in the fibre core allows the reduction of the active fibre length and the increase in the threshold powers of various nonlinear effects in the fibre, thereby increasing the maximum output power of fibre lasers. For this purpose, we manufactured a highly concentrated ytterbium-doped ({approx}1.0x10{sup 21}cm{sup -3}) phosphate glass for the active fibre core and a pure glass of a similar composition for the fibre cladding. A single-mode fibre is fabricated from these glasses and generation is obtained in an ytterbium laser based on this fibre with the slope efficiency of no less than 60% at a wavelength of 975 nm. (letters)

Bufetov, Igor' A; Semenov, S L; Kosolapov, A F; Mel'kumov, Mikhail A; Dudin, V V; Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation); Galagan, B I; Denker, B I; Osiko, Vyacheslav V; Sverchkov, S E [Laser Materials and Technology Research Center, A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2006-03-31

129

Interplay between photo- and radiation-induced darkening in ytterbium-doped fibers.  

PubMed

This Letter demonstrates a remarkable interplay between photo- and radiation-induced darkening of ytterbium-doped alumino-silica optical fibers operated in amplifying conditions and harsh environments (as, e.g., in space-based applications). Influences of the pump power, ionizing dose, and dose rate on this interaction are characterized. The pump is capable of accelerating or slowing down the radiation-induced darkening build-up depending on the ionizing dose. The steady-state photo-radio-darkening level is independent of the dose and at least equal to the equilibrium level of pure photo-darkening. This lower limit is notably reached at low dose rates, including those encountered in space. We, therefore, argue that photo-resistant ytterbium-doped fibers will resist against a space mission, whatever the dose. PMID:25361132

Duchez, Jean-Bernard; Mady, Franck; Mebrouk, Yasmine; Ollier, Nadège; Benabdesselam, Mourad

2014-10-15

130

Luminescence and absorption of divalent ytterbium ion in yttrium-aluminum garnet ceramics  

NASA Astrophysics Data System (ADS)

Strong absorption bands at 280, 385, and 640 nm; a pulsed cathodoluminescence band with peaks at 325 and 520 nm and a dip at 385 nm; and a structured luminescence band in the range of 591-711 nm composed of four pair lines and having a dip near 640 nm have been observed in the spectra of yttrium-aluminum garnet ceramics activated with ytterbium (10 mol %) and subjected to vacuum sintering at a temperature of 1800°C. It is shown that these spectral features are absorption and luminescence bands of divalent ytterbium ions with the 4 f 136 s electron configuration of the ground state. These ions occupy the cubic site that is formed under conditions of oxygen deficit and disappears when the latter is removed during annealing ceramics in air.

Solomonov, V. I.; Osipov, V. V.; Spirina, A. V.

2014-09-01

131

Efficient compression of the femtosecond pulses of an ytterbium laser in a gas-filled capillary  

SciTech Connect

A 290-fs radiation pulse of an ytterbium laser system with a central wavelength of 1028 nm and an energy of 145 {mu}J was compressed to a 27-fs pulse with an energy of 75 {mu}J. The compression was realised on the basis of the effect of pulse spectrum broadening in a xenon-filled glass capillary for a pulse repetition rate of 3kHz. (control of laser radiation parameters)

Konyashchenko, Aleksandr V; Losev, Leonid L; Tenyakov, S Yu

2011-07-31

132

Tunable nanosecond ytterbium-doped master-oscillator fiber amplifier system  

Microsoft Academic Search

Pulsed ytterbium-doped fiber lasers and amplifiers cover a large field of applications in industry, medicine or science. Some of these applications like frequency conversion or high-precision material processing require high peak power and high-energy pulses. It turns out that Yd-doped materials and in particular Yb-glass fibers provide broad gain bandwidth ranging from 1000 to 1150 nm. Such a property can

Romain Royon; Jerome Lhermite; Guillaume Machinet; Laurent Sarger; Eric Cormier

2011-01-01

133

Experimental Performance of a Single-Mode Ytterbium-doped Fiber Ring Laser with Intracavity Modulator  

NASA Technical Reports Server (NTRS)

We have developed a linearly polarized Ytterbium-doped fiber ring laser with a single longitudinal mode output at 1064 run. A fiber-coupled intracavity phase modulator ensured mode-hop free operation and allowed fast frequency tuning. The fiber laser was locked with high stability to an iodine-stabilized laser, showing a frequency noise suppression of a factor approx 10 (exp 5) at 1 mHz

Numata, Kenji; Camp, Jordan

2012-01-01

134

Broadband diode-pumped ytterbium-doped fiber amplifier with 34 dBm output power  

Microsoft Academic Search

We investigate a high-power diode-pumped double-clad ytterbium-doped fiber amplifier with 34 dB m average output power and 1050 - 1095 nm bandwidth. A multi-diode concentrator pumps the amplifier at 980 nm, with ~6 W of power launched into the inner cladding. Besides cw-signals, we amplify pulses from a mode-locked laser to 1 kW of peak power with only minor nonlinear

J. M. Sousa; J. Nilsson; C. C. Renaud; J. A. Alvarez-Chavez; A. B. Grudinin; J. D. Minelly

135

High output power Erbium-Ytterbium doped cladding pumped fiber amplifier  

Microsoft Academic Search

The performance of a high output power Erbium-Ytterbium doped fiber amplifier (EYDFA) pumped by a 927 nm laser diode are proposed\\u000a and experimentally investigated. The EYDFA provides a flat gain and output power higher than 23 dBm in the wavelength region\\u000a from 1545 to 1566 nm using a double-pass configuration. A broadband fiber Bragg grating is used in the double-pass

S. W. Harun; M. R. A. Moghaddam; H. Ahmad

2010-01-01

136

High output power Erbium-Ytterbium doped cladding pumped fiber amplifier  

Microsoft Academic Search

The performance of a high output power Erbium-Ytterbium doped fiber amplifier (EYDFA) pumped by a 927 nm laser diode are proposed and experimentally investigated. The EYDFA provides a flat gain and output power higher than 23 dBm in the wavelength region from 1545 to 1566 nm using a double-pass configuration. A broadband fiber Bragg grating is used in the double-pass

S. W. Harun; M. R. A. Moghaddam; H. Ahmad

2010-01-01

137

Experimental and theoretical studies on ytterbium sensitized erbium-doped fiber amplifier  

Microsoft Academic Search

The performance of a high power erbium–ytterbium doped fiber amplifier (EYDFA) is investigated experimentally and theoretically. The EYDFA provides a flat gain with an output power higher than 23dBm in the wavelength region from 1541 to 1565nm using a multimode pumping at 927nm. In the theoretical analysis, the rate and power propagation equations are solved to examine the effect of

M. R. A. Moghaddam; S. W. Harun; R. Parvizi; Z. S. Salleh; H. Arof; A. Lokman; H. Ahmad

2011-01-01

138

Atomic emission determination of samarium, europium, ytterbium, and lutetium in silicate rocks  

SciTech Connect

A procedure is discussed that has been developed for the atomic emission determination of samarium, europium, ytterbium and lutetium in silicate rocks, using a cooled hollow cathode as the source of spectrum excitation. By using an isotope dilution procedure, the relative standard deviation can be reduced to 0.007 for a range of determined contents of the elements from n ha 10/sup -4/ to n ha 10/sup -3/% by weight.

Drobyshev, A.I.; Turkin, Yu.I.; Yakimova, N.M.

1986-06-01

139

A 103 W erbium–ytterbium co-doped large-core fiber laser  

Microsoft Academic Search

We report a highly efficient cladding-pumped erbium–ytterbium co-doped large-core fiber laser, generating up to 103 W of continuous-wave output power at 1.57 ?m with a beam quality (M2) of 2.0. The overall slope efficiency was 30% (40% at low powers) with respect to the launched pump power. A roll-off in output power was observed at higher powers caused by the

J. K Sahu; Y Jeong; D. J Richardson; J Nilsson

2003-01-01

140

Optical properties of polymer waveguides dispensed on an erbium\\/ytterbium codoped glass  

Microsoft Academic Search

A composite waveguide was fabricated by dispensing polymer on top of an erbium\\/ytterbium codoped bulk glass. The parabolic surface of the polymer layer induces a transverse graded index waveguide behavior enabling tighter lateral confinement of light than in a typical step-index multimode waveguide. Spontaneous emission of light in the 1520-1570-nm band has been observed, We have also observed up to

Madhu Krishnaswamy; David Boertjes; J. N. McMullin; Barrie P. Keyworth

1996-01-01

141

Solid state reactions of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with high surface area silica in oxidizing and reducing atmosphere  

SciTech Connect

The interaction of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with a high surface amorphous silica support in an oxidizing and reducing atmosphere was studied by XRD, HRTEM, SAED, SEM and BET techniques. The Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} system shows very high structural and size stability in the oxidizing atmosphere up to 1000 Degree-Sign C, but in hydrogen spreading of the oxide onto silica occurs at temperatures above 800 Degree-Sign C. In the oxidizing atmosphere stability of the mixed oxide is limited by extraction of ytterbium from the oxide driven by a tendency to form ytterbium silicates. A new polymorph of Yb silicate, isomorphic with y-Y{sub 2}Si{sub 2}O{sub 7} (yttrialite), has been identified in the samples containing the mixed Ce-Yb oxide. The absence of y-Yb{sub 2}Si{sub 2}O{sub 7} silicate in the Yb{sub 2}O{sub 3}-SiO{sub 2} samples treated in similar conditions indicates that Ce{sup 4+} ions are needed to stabilize the structure. - Graphical abstract: Structure evolution of nano-Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in air and in H{sub 2}. Highlights: Black-Right-Pointing-Pointer Nano-Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} on SiO{sub 2} is stable in air up to 1000 Degree-Sign C but spreads in hydrogen at 800 Degree-Sign C. Black-Right-Pointing-Pointer Formation of Yb silicates determines the stability of Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} at high temperatures. Black-Right-Pointing-Pointer New, y-Yb{sub 2}Si{sub 2}O{sub 7} silicate (yttrialite type) forms in Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in H{sub 2} at 1100 Degree-Sign C.

Malecka, Malgorzata A. [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw 2 (Poland); Kepinski, Leszek, E-mail: L.Kepinski@int.pan.wroc.pl [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw 2 (Poland)

2012-08-15

142

The influence of Yb2+ ions on optical properties and power stability of ytterbium-doped laser fibers  

NASA Astrophysics Data System (ADS)

Up to now, the role of divalent ytterbium ion has been controversially discussed in the literature concerning its influence on the photodarkening of ytterbium doped high power laser fibers. In general, however, the experimental findings are relatively sparse and some discussions are based more on speculations than on examined facts. Here we report on systematical investigations concerning the formation of Yb2+ during the fabrication process of preforms and fibers. By Modified Chemical Vapor Deposition, fibers with different codopants (additional to the active ytterbium doping) have been prepared in a well-defined manner, regarding process parameters and glass composition. The comprehensive characterization of the samples involves the ytterbium absorption in the NIR, the UV absorption and UV excited emission. The typical spectral features in the UV and visible range have been analysed and correlated with the presence of Yb2+. The amount of formed divalent ytterbium ions shows a strong dependence on the process route and varies remarkably with the kind and concentration of the codopants. Photodarkening tests have been accomplished in order to correlate the power stability with the Yb2+ content. Moreover, the formation of Yb2+ during the process of UV radiation darkening was investigated.

Kirchhof, J.; Unger, S.; Schwuchow, A.; Jetschke, S.; Reichel, V.; Leich, M.; Scheffel, A.

2010-02-01

143

Divalent lanthanide chemistry. Bis(pentamethylcyclopentadienyl)europium(II) and -ytterbium(II) derivatives: Crystal structure of bis(pentamethylcyclopentadienyl) (tetrahydrofuran) ytterbium(II)-hemitoluene at 176 K  

SciTech Connect

Red, paramagnetic (diethyl ether)bis(pentamethylcyclopentadienyl)(tetrahydrofuran)europium(II), (Me/sub 5/C/sub 5/)/sub 2/Eu(THF)(Et/sub 2/O), is isolated from reaction of 3 molar equiv of sodium pentamethylcyclopentadienide and europium trichloride in refluxing tetrahyrofuran, after crystallization from diethyl ether. The mono(tetrahydrofuran) complex (Me/sub 5/C/sub 5/)/sub 2/Eu(THF) may be isolated by use of toluene rather than diethyl ether. Red, diamagnetic bis(pentamethylcyclopentadienyl)(tetrahydrofuran)ytterbium(II) is isolated from the reaction of ytterbium dichloride and sodium pentamethylcyclopentadienide in refluxing tetrahydrofuran. The diethyl ether complex (Me/sub 5/C/sub 5/)/sub 2/Yb(OEt/sub 2/) may be isolated by crystallization of the tetrahydrofuran complex from diethyl ether. The hemitoluene complex(Me/sub 5/C/sub 5/)/sub 2/Yb(THF)./sup 1///sub 2/tol can be isolated by recrystallization of the tetrahydrofuran complex from toluene. As these divalent metallocenes are the first hydrocarbon-soluble lanthanide derivatives to be isolated, we have examined the latter complex by X-ray crystallography. Crystals of (Me/sub 5/C/sub 5/)/sub 2/Yb(OC/sub 4/H/sub 8/)./sup 1///sub 2/C/sub 6/H/sub 5/CH/sub 3/ crystallize in the monoclinic system, P2/sub 1//n, with a = 11.358 (8) A, b = 21.756 (19) A, C = 10.691 (7) A, and ..beta.. = 101.84 (5)/sup 0/ at 176 K. For Z = 4 the calculated density is 1.37 g cm/sup -3/. The ytterbium atom is coordinated to the oxygen atom of a tetrahydrofuran molecule and to two pentamethylcyclopentadienyl rings. The molecule has approximate C/sub 2/ symmetry about the Yb-O bond. The Yb-O distance is 2.41 A, the Yb-C distances average 2.66 A, and the Yb-Cp(centroid) distances average 2.37 A. The Me/sub 5/C/sub 5/ rings are in a staggered configuration with respect to each other.

Tilley, T.D.; Anderson, R.A.; Spencer, B.; Ruben, H.; Zalkin, A.; Templeton, D.H.

1980-10-01

144

13 CFR 120.175 - Coastal barrier islands.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Coastal barrier islands. 120.175 Section...Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries...not make or guarantee any loan within the Coastal Barrier Resource...

2010-01-01

145

DIVALENT LANTHANIDE CHEMISTRY; BIS (PENTAMETHYLCYCLOPENTADIENYL) EUROPIUM(II) AND YTTERBIUM(II) DERIVATIVES: CRYSTAL STRUCTURE OF BIS(PENTAMETHYLCYCLOPENTADIENYL) YTTERBIUM (II)TETRAHYDROFURAN HEMI (TOLUENE) AT 176K  

SciTech Connect

Red, paramagnetic ({mu}{sub B} = 7.99 B.M., 5-50K) bis(pentamethylcyclopentadienyl) europium (II)(tetrahydrofuran)(diethylether), (Me{sub 5}C{sub 5}){sub 2}Eu(THF)(Et{sub 2}O) is isolated from reaction of three molar equivalents of sodium pentamethylcyclopentadienide and europium trichloride in refluxing tetrahydrofuran, after crystallization from diethyl ether. The monotetrahydrofuran complex, (Me{sub 5}C{sub 5}){sub 2}Eu(THF), may be isolated by use of toluene rather than diethyl ether as the crystallization solvent. Red, diamagnetic bis(pentamethylcyclopentadienyl)ytterbium(II)(tetrahydrofuran) is isolated from the reaction of ytterbium dichloride and sodium pentamethylcyclopentadienide in refluxing tetrahydrofuran. The diethyl ether complex, (Me{sub 5}C{sub 5}){sub 2}Yb(OEt{sub 2}), may be isolated by crystallization of the tetrahydrofuran complex from diethylether, The hemi-toluene complex, (Me{sub 5}C{sub 5}){sub 2} Yb(THF) {center_dot} 1/2 toluene, can be isolated by recrystallization of the tetrahydrofuran complex from toluene. As these divalent metallocenes are the first hydrocarbon-soluble lanthanide derivatives to be isolated we have examined the latter complex by X-ray crystallography. Crystals of (Me{sub 5}C{sub 5}){sub 2}Yb(OC{sub 4}H{sub 8}) {center_dot} 1/2(C{sub 6}H{sub 5}cH{sub 3}) crystalline in the monoclinic system, P2{sub 1}/n, with a = 11.358(8) {angstrom}, b = 21.756(19) {angstrom}, c = 10.691(7) {angstrom}, and {beta} = 101.84(5){sup o} at 176K. For Z = 4 the calculated density is 1.37 g cm{sup -3}. The ytterbium atom is coordinated to the oxygen atom of a tetrahydrofuran molecule and to two pentamethyl cyclopentadienyl rings. The molecule has approximate c{sub 2} symmetry about the Yb-0 bond. The Yb-0 distance is 2.41 {angstrom}, the Yb-C distances average 2.66 {angstrom}, and the Yb-Cp (centroid) distances average 2.37 {angstrom}. The Me{sub 5}C{sub 5} rings are in a staggered configuration with respect to each other. The methyl groups of the Me{sub 5}C{sub 5} groups are displaced by .03 to .21 {angstrom} from the planes of the five-membered rings away from the ytterbium atom. The toluene molecule is not coordinated to the complex and is on a center of symmetry in a disordered configuration. The 3466 data with F{sup 2} > 3{sigma} refined by full matrix least-squares to a conventional R factor of 0.036.

Tilley, T.Don; Andersen, Richard A.; Spencer, Brock; Ruben, Helena; Zalkin, Allan; Templeton, David H.

1980-04-01

146

The hyperfine interaction in the odd isotope of ytterbium fluoride, 171YbF  

NASA Astrophysics Data System (ADS)

The pure rotational spectrum of a minor isotopologue of ytterbium fluoride, 171YbF, in the X2?+ (v = 0) state has been recorded using Fourier transform microwave (FTMW) spectroscopy and pump/probe microwave optical double resonance (PPMODR) spectroscopy. The pure rotational spectra and precisely measured splittings in the (0, 0) A2?1/2 ? X2?+ band were analyzed to produce an improved set of fine and magnetic hyperfine parameters for the X2?+ (v = 0) state of 171YbF. A comparison with theoretical predictions is made.

Glassman, Zachary; Mawhorter, Richard; Grabow, Jens-Uwe; Le, Anh; Steimle, Timothy C.

2014-06-01

147

1009 nm continuous-wave ytterbium-doped fiber amplifier emitting 146 W.  

PubMed

In this Letter, we demonstrate a single-mode continuous-wave fiber laser amplifier emitting 146 W of average output power at a wavelength of 1009 nm. The wavelength and bandwidth of the seed oscillator are defined by a pair of fiber Bragg gratings. The seed is amplified in a two-stage ytterbium-doped rod-type amplifier to 146 W with a high slope efficiency of 64%, showing excellent beam quality and stability throughout the experiment. The ASE suppression is as high as 63 dB. PMID:24978721

Beier, F; Otto, H-J; Jauregui, C; de Vries, O; Schreiber, T; Limpert, J; Eberhardt, R; Tünnermann, A

2014-07-01

148

Single-frequency, polarized ytterbium-doped fiber MOPA source with 264 W output power  

Microsoft Academic Search

A single-frequency, single-mode, plane-polarized ytterbiumdoped all-fiber master-oscillator - power amplifier source at 1060 um generated 264 W of cw output $wer (pump-power limited) The li-stage amplifier operated with a high gain of 19 dB and a high conversion efficiency of 68%. 02004 Optical Society of America OCIS codes: (140.3510) Lasea, fiber; (060.2420) Fiben, polarization-maintaining Cladding-pumped ytterbium-doped fiber sources have been

Y. Jeong; J. Nilsson; J. K. Sahu; D. B. S. Soh; C. Alegria; P. Dupriez; C. A. Codemard; D. N. Payne; R. Harley; L. M. B. Hickey; L. Wanzcyk; C. E. Chryssou; J. Alvarez-Chavez; P. W. Turner

2004-01-01

149

Site-resolved imaging of ytterbium atoms in a two-dimensional optical lattice  

E-print Network

We report a high-resolution microscope system for imaging ytterbium atoms trapped in a two-dimensional optical lattice. By using the ultra-violet strong transition combined with a solid immersion lens and high resolution optics, we achieved a 377(13) nm optical resolution, and resolved individual sites in an optical lattice with 543 nm spacing. The deep potential required for the imaging process was prepared using a combination of a shallow ground state and a deep excited state potentials. This system is suitable for alkaline-earth-metal-like atoms, where other sub-Doppler cooling techniques are not available.

Miranda, Martin; Okuyama, Yuki; Kozuma, Mikio

2014-01-01

150

Optimization of erbium-ytterbium fibre laser with simple double-clad structure  

NASA Astrophysics Data System (ADS)

The paper deals with optimization of fibre laser based on experimental erbium- and ytterbium-doped fibre with simple double-clad structure pumped by multimode laser diode in 980 nm band. Fibre preparation and its characteristics are described. Different resonator configurations were investigated for the laser optimization, including high reflectivity fibre loop mirror. Experimental optimization ofthe pump wavelength, fibre length and output coupler ratio were carried out. The results obtained under the cladding pumping are compared with those measured with a fibre ring laser containing the same fibre single-mode pumped at 1060 nm.

Peterka, Pavel; Kašík, Ivan; Kube?ek, Václav; Mat?jec, Vlastimil; Hayer, Miloš; Honzátko, Pavel; Zavadilova, Alena; Dvo?á?ek, Pavel

2006-03-01

151

High power supercontinuum generation in a nonlinear ytterbium-doped fiber amplifier.  

PubMed

High power supercontinuum generation with 70 W average output power in a nonlinear ytterbium-doped fiber amplifier is demonstrated using all-normal dispersion, all-fiber master oscillator power amplifier configuration. The supercontinuum covers from 1064 nm to beyond 1700 nm with spectral flatness better than 12 dB and 67.3% optical to optical conversion efficiency. The almost uniform spectral power density across the whole continuum is more than 70 mW/nm and the nanosecond bursts output have an effective peak power of 82.7 kW. PMID:22555727

Song, Rui; Hou, Jing; Chen, Shengping; Yang, Weiqiang; Lu, Qisheng

2012-05-01

152

400-mW 1060-nm ytterbium-doped fiber DFB laser  

NASA Astrophysics Data System (ADS)

We report for the first time, more than 400 mW of output power at 1056.1nm from a distributed feedback (DFB) fiber laser. The DFB fiber laser comprises a simple ?-phase-shifted Bragg grating written into a photosensitive ytterbium-doped fiber. The laser operates with a single longitudinal mode at a wavelength defined by the phase shift and the grating period. Without any internal polarisation selection mechanism, the cavity supports orthogonal polarisation modes, which operate simultaneously. The DFB fiber laser was pumped by a 976nm amplified spontaneous emission (ASE) source based on a ytterbium doped jacketed air clad (JAC) fiber pumped by a 915nm multimode laser diode source. An output of 400mW at 1056.1nm was obtained from the output port while 70mW was obtained from the other port, when pumped with 1.5W of 976nm radiation. The total output from the DFB fiber laser was approximately linear with increasing pump power and the overall performance was limited by the available pump power. The spectral characteristics and signal to noise ratio remained similar over the pump power range. The output of the DFB was in single-mode fiber (ie. M2~1).

Codemard, Christophe A.; Hickey, Louise M. B.; Yelen, Kuthan; Soh, Daniel B. S.; Wixey, Rachel; Coker, Mark; Zervas, Mikhail N.; Nilsson, Johan

2004-06-01

153

Tunable picosecond SESAM mode-locking ytterbium-doped double-clad LMA PCF oscillator  

NASA Astrophysics Data System (ADS)

A picosecond tunable ytterbium-doped double-clad fiber oscillator with semiconductor saturable absorber mirror (SESAM) mode-locking large mode area (LMA) photonic crystal fiber (PCF) is demonstrated. Without any tunable elements in the oscillator, we obtain self-starting mode locking ytterbium-doped fiber oscillator tunable over 35.5 nm. The center wavelength in the ranges from 1028.5 nm to 1064 nm with excellent beam quality is achieved by proper adjusting the polarization beam splitter (PBS), half-wave plate (HWF) and SESAM in the laser cavity. The output power ranges from 0.76 W to 1.01 W at the different center wavelengths under the same incident pump power. A narrow spectral bandwidth with only 0.25-0.5 nm and pulsed duration with 7.9 ps have been obtained at the different center wavelengths. The repetition rate has been measured to be about 45.9 MHz, which has a slight change for the different center wavelengths.

Li, Pingxue; Zhao, Ziqiang; Chi, Junjie; Yang, Chun; Zhang, Guangju; Hu, Haowei; Yao, Yifei; Li, Yao; Wang, Xiongfei; Zhong, Guoshun; Zhao, Hong; Jiang, Dongsheng

2014-04-01

154

Study of low energy Ytterbium atom-ion charge transfer collisions using a surface-electrode trap  

E-print Network

We demonstrate a new isotope-selective system to measure low energy charge transfer collisions between ytterbium ions and atoms in the range of collisional energy from 2.2x 10-5 eV to 4.3x 10-3 eV, corresponding to effective ...

Pruttivarasin, Thaned

2008-01-01

155

RADECS 2010 Proceedings Paper LN2 1 Abstract--Radiation effects in ytterbium-doped silica optical  

E-print Network

the commercial substrate tube down to the fiber, via the preform stage. Samples consist of ~4 mm radius and 1 fibers are still poorly studied despite their importance in space- based applications as optical inter Stimulated Luminescence, Ytterbium-doped silica optical fibers. I. INTRODUCTION HE radiation

Boyer, Edmond

156

Ytterbium- and chromium-doped fibre laser: from chaotic self-pulsing to passive Q-switching  

E-print Network

A spontaneously chaotic, self-pulsing ytterbium-doped fibre laser is partially stabilized into the passively Q-switched mode of operation using a chromium-doped saturable absorber fibre. This original all-fibre laser produces sustained and stable trains of smooth pulses at high repetition rate.

Dussardier, Bernard; Peterka, P

2011-01-01

157

21 CFR 161.175 - Frozen raw breaded shrimp.  

...CONTINUED) FOOD FOR HUMAN CONSUMPTION FISH AND SHELLFISH Requirements for Specific Standardized Fish and Shellfish § 161.175 Frozen raw...are in a shape similar to that of breaded fish sticks the name is “Breaded shrimp...

2014-04-01

158

7 CFR 400.175 - Revocation and non-acceptance.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF AGRICULTURE GENERAL ADMINISTRATIVE REGULATIONS Reinsurance Agreement-Standards for Approval; Regulations for the 1997 and Subsequent Reinsurance Years § 400.175 Revocation and non-acceptance. (a) FCIC will deny reinsurance...

2010-01-01

159

40 CFR 152.175 - Pesticides classified for restricted use.  

Code of Federal Regulations, 2012 CFR

...Classification of Pesticides § 152.175 Pesticides classified for restricted use. The following uses of pesticide products containing the active ingredients...Residue effects on avian species. Hazard to bees. All dust and granular...

2012-07-01

160

18 CFR 367.1750 - Account 175, Derivative instrument assets.  

Code of Federal Regulations, 2010 CFR

...SUBJECT TO THE PROVISIONS OF THE PUBLIC UTILITY HOLDING COMPANY ACT OF 2005, FEDERAL POWER ACT AND NATURAL GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175, Derivative instrument assets. This account...

2010-04-01

161

18 CFR 367.1750 - Account 175, Derivative instrument assets.  

Code of Federal Regulations, 2012 CFR

...SUBJECT TO THE PROVISIONS OF THE PUBLIC UTILITY HOLDING COMPANY ACT OF 2005, FEDERAL POWER ACT AND NATURAL GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175, Derivative instrument assets. This account...

2012-04-01

162

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2010 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2010-07-01

163

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2012 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2012-07-01

164

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2011 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2011-07-01

165

View of 175 ton hoisthouse from northeast. Hoist operator's cab ...  

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

View of 175 ton hoist-house from northeast. Hoist operator's cab is in foreground center. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

166

Interior view of 175 ton hoist house looking at the ...  

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

Interior view of 175 ton hoist house looking at the exterior casing for the wire rope spools. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

167

25 CFR 175.40 - Financing of extensions and upgrades.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES System Extensions and Upgrades § 175.40 Financing... (a) The utility may extend or upgrade its electric system to serve additional loads (new or...

2010-04-01

168

27 CFR 27.175 - Receipt by consignee.  

...ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY ALCOHOL IMPORTATION OF DISTILLED SPIRITS, WINES, AND BEER Transfer of Distilled Spirits From Customs Custody to Bonded Premises of Distilled Spirits Plant § 27.175 Receipt...

2014-04-01

169

27 CFR 27.175 - Receipt by consignee.  

Code of Federal Regulations, 2013 CFR

...ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY ALCOHOL IMPORTATION OF DISTILLED SPIRITS, WINES, AND BEER Transfer of Distilled Spirits From Customs Custody to Bonded Premises of Distilled Spirits Plant § 27.175 Receipt...

2013-04-01

170

25 CFR 175.31 - Methods and terms of payment.  

Code of Federal Regulations, 2010 CFR

...31 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.31 Methods and terms of payment. Payments shall be made in person...

2010-04-01

171

25 CFR 175.31 - Methods and terms of payment.  

...31 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.31 Methods and terms of payment. Payments shall be made in person...

2014-04-01

172

25 CFR 175.31 - Methods and terms of payment.  

Code of Federal Regulations, 2011 CFR

...31 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.31 Methods and terms of payment. Payments shall be made in person...

2011-04-01

173

25 CFR 175.31 - Methods and terms of payment.  

Code of Federal Regulations, 2013 CFR

...31 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.31 Methods and terms of payment. Payments shall be made in person...

2013-04-01

174

25 CFR 175.31 - Methods and terms of payment.  

Code of Federal Regulations, 2012 CFR

...31 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.31 Methods and terms of payment. Payments shall be made in person...

2012-04-01

175

40 CFR 415.175 - New source performance standards (NSPS).  

Code of Federal Regulations, 2012 CFR

...AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY Sodium Dichromate and Sodium Sulfate Production Subcategory § 415.175 New source performance standards (NSPS). Any new source...

2012-07-01

176

40 CFR 415.175 - New source performance standards (NSPS).  

Code of Federal Regulations, 2013 CFR

...AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY Sodium Dichromate and Sodium Sulfate Production Subcategory § 415.175 New source performance standards (NSPS). Any new source...

2013-07-01

177

40 CFR 415.175 - New source performance standards (NSPS).  

Code of Federal Regulations, 2011 CFR

...AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY Sodium Dichromate and Sodium Sulfate Production Subcategory § 415.175 New source performance standards (NSPS). Any new source...

2011-07-01

178

40 CFR 415.175 - New source performance standards (NSPS).  

Code of Federal Regulations, 2010 CFR

...AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY Sodium Dichromate and Sodium Sulfate Production Subcategory § 415.175 New source performance standards (NSPS). Any new source...

2010-07-01

179

40 CFR 415.175 - New source performance standards (NSPS).  

...AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY Sodium Dichromate and Sodium Sulfate Production Subcategory § 415.175 New source performance standards (NSPS). Any new source...

2014-07-01

180

40 CFR 46.175 - Terms and conditions.  

Code of Federal Regulations, 2010 CFR

...Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE FELLOWSHIPS Award § 46.175 Terms...a) If EPA awards you a fellowship on the basis of a nomination...employer, by accepting the fellowship agreement you agree...

2010-07-01

181

27 CFR 22.175 - Discontinuance of use.  

Code of Federal Regulations, 2013 CFR

...Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY ALCOHOL DISTRIBUTION AND USE OF TAX-FREE ALCOHOL Use of Tax-Free Spirits by the United States or Government Agency § 22.175 Discontinuance of use....

2013-04-01

182

27 CFR 22.175 - Discontinuance of use.  

...Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY ALCOHOL DISTRIBUTION AND USE OF TAX-FREE ALCOHOL Use of Tax-Free Spirits by the United States or Government Agency § 22.175 Discontinuance of use....

2014-04-01

183

27 CFR 22.175 - Discontinuance of use.  

Code of Federal Regulations, 2010 CFR

...Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY LIQUORS DISTRIBUTION AND USE OF TAX-FREE ALCOHOL Use of Tax-Free Spirits by the United States or Government Agency § 22.175 Discontinuance of use....

2010-04-01

184

27 CFR 22.175 - Discontinuance of use.  

Code of Federal Regulations, 2011 CFR

...Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY LIQUORS DISTRIBUTION AND USE OF TAX-FREE ALCOHOL Use of Tax-Free Spirits by the United States or Government Agency § 22.175 Discontinuance of use....

2011-04-01

185

27 CFR 22.175 - Discontinuance of use.  

Code of Federal Regulations, 2012 CFR

...Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY LIQUORS DISTRIBUTION AND USE OF TAX-FREE ALCOHOL Use of Tax-Free Spirits by the United States or Government Agency § 22.175 Discontinuance of use....

2012-04-01

186

40 CFR 152.175 - Pesticides classified for restricted use.  

Code of Federal Regulations, 2010 CFR

... 23 2010-07-01 2010-07-01 false Pesticides classified for restricted use. 152.175 Section...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS PESTICIDE REGISTRATION AND CLASSIFICATION PROCEDURES...

2010-07-01

187

40 CFR 152.175 - Pesticides classified for restricted use.  

Code of Federal Regulations, 2011 CFR

... 24 2011-07-01 2011-07-01 false Pesticides classified for restricted use. 152.175 Section...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS PESTICIDE REGISTRATION AND CLASSIFICATION PROCEDURES...

2011-07-01

188

42 CFR 411.175 - Basis for Medicare primary payments.  

Code of Federal Regulations, 2013 CFR

42 Public Health 2 2013-10-01...Basis for Medicare primary payments. 411...411.175 Public Health CENTERS FOR MEDICARE & MEDICAID...SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES...Basis for Medicare primary payments....

2013-10-01

189

42 CFR 411.175 - Basis for Medicare primary payments.  

Code of Federal Regulations, 2010 CFR

42 Public Health 2 2010-10-01...Basis for Medicare primary payments. 411...411.175 Public Health CENTERS FOR MEDICARE & MEDICAID...SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES...Basis for Medicare primary payments....

2010-10-01

190

42 CFR 411.175 - Basis for Medicare primary payments.  

Code of Federal Regulations, 2011 CFR

42 Public Health 2 2011-10-01...Basis for Medicare primary payments. 411...411.175 Public Health CENTERS FOR MEDICARE & MEDICAID...SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES...Basis for Medicare primary payments....

2011-10-01

191

42 CFR 411.175 - Basis for Medicare primary payments.  

Code of Federal Regulations, 2012 CFR

42 Public Health 2 2012-10-01...Basis for Medicare primary payments. 411...411.175 Public Health CENTERS FOR MEDICARE & MEDICAID...SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES...Basis for Medicare primary payments....

2012-10-01

192

40 CFR 60.175 - Monitoring of operations.  

Code of Federal Regulations, 2010 CFR

...PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for Primary Zinc Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter subject to the provisions of this subpart shall install and...

2010-07-01

193

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Airborne weather radar equipment requirements. 135...and Equipment § 135.175 Airborne weather radar equipment requirements. ...passenger-carrying operations unless approved airborne weather radar equipment is installed in the...

2011-01-01

194

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Airborne weather radar equipment requirements. 135...and Equipment § 135.175 Airborne weather radar equipment requirements. ...passenger-carrying operations unless approved airborne weather radar equipment is installed in the...

2012-01-01

195

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Airborne weather radar equipment requirements. 135...and Equipment § 135.175 Airborne weather radar equipment requirements. ...passenger-carrying operations unless approved airborne weather radar equipment is installed in the...

2013-01-01

196

14 CFR 135.175 - Airborne weather radar equipment requirements.  

...2014-01-01 2014-01-01 false Airborne weather radar equipment requirements. 135...and Equipment § 135.175 Airborne weather radar equipment requirements. ...passenger-carrying operations unless approved airborne weather radar equipment is installed in the...

2014-01-01

197

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Airborne weather radar equipment requirements. 135...and Equipment § 135.175 Airborne weather radar equipment requirements. ...passenger-carrying operations unless approved airborne weather radar equipment is installed in the...

2010-01-01

198

Bis(pentamethylcyclopentadienyl) ytterbium: Electron-transfer reactions with organotransition metal complexes  

SciTech Connect

The divalent lanthanide complex, (Me{sub 5}C{sub 5}){sub 2}Yb, reacts with methylcopper to produce the base-free, ytterbium-methyl complex, (Me{sub 5}C{sub 5}){sub 2}YbMe. This product forms a asymmetric, methyl-bridged dimer in the solid state. The bulky alkyl complex, (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}, displays similar chemistry to (Me{sub 5}C{sub 5}){sub 2}YbMe, but at a reduced reaction rate due to the limited accessibility of the metal in (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}. Copper and silver halide salts react with (Me{sub 5}C{sub 5}){sub 2}V to produce the trivalent halide derivatives, (Me{sub 5}C{sub 5}){sub 2}VX (X + F, Cl, Br, I). The chloride complex, (Me{sub 5}C{sub 5}){sub 2}VCl, reacts with lithium reagents to form the phenyl and borohydride species. Nitrous oxide transfers an oxygen atom to (Me{sub 5}C{sub 5}){sub 2}V producing the vanadium-oxo complex, (Me{sub 5}Ce{sub 5}){sub 2}VO. The trivalent titanium species, (Me{sub 5}C{sub 5}){sub 2}TiX (X = Cl, Br, Me, BH{sub 4}), form bimetallic coordination complexes with (Me{sub 5}C{sub 5}){sub 2}Yb. The magnetic behavior of the products indicates that electron transfer has not occurred. The solid state structures of the chloride and bromide complexes show unusual bend angles for the halide bridges between ytterbium and titanium. A model based on frontier orbital theory has been proposed to account for the bending behavior in these species. The bimetallic methyl complex contains a linear methyl bridge between ytterbium and titanium.

Matsunaga, P.T.

1991-11-01

199

Thermo-optical measurements of ytterbium doped ceramics (Sc2O3, Y203, Lu203, YAG) and crystals (YAG, CaF2) at cryogenic temperatures  

NASA Astrophysics Data System (ADS)

In this paper, we report the measurements of the specific heat, the density and the thermal diffusivity at room and cryogenic temperatures of Ytterbium doped cubic sesquioxides (Sc2O3, Y2O3, Lu2O3) ceramics and of Ytterbium doped crystals (YAG, CaF2). These materials appear to have very interesting properties for setting up high average power laser chains useful for plasma physics and for inertial fusion energy drivers.

Le Garrec, B.; Cardinali, V.; Bourdet, G.

2013-05-01

200

146W continuous wave ytterbium doped fiber amplifier at 1009 nm  

NASA Astrophysics Data System (ADS)

In this contribution we demonstrate a single mode continuous wave laser amplifier with 146 W of power at a wavelength of 1009 nm. On one hand this experiments constitutes an extension of the wavelength range of high power fiber lasers, furthermore, emission wavelength well below 1030 nm find use for efficient high-brightness tandem pumping of high power fiber amplifiers. The wavelength and bandwidth of the seed oscillator are defined by a pair of fiber Bragg gratings. This seed is amplified in a two-stage Ytterbium-doped rod-type amplifier to 146 W with a high slope efficiency of 64 %, an excellent beam quality and an ASE-suppression as high as 63 dB.

Beier, F.; Otto, H.-J.; Sattler, B.; Ploetner, M.; Haarlammert, N.; de Vries, O.; Jauregui, C.; Schreiber, T.; Limpert, J.; Eberhardt, R.; Tünnermann, A.

2014-03-01

201

Electronic Structure of Ytterbium-Doped Strontium Fluoroapatite: Photoemission and Photoabsorption Investigation  

SciTech Connect

X-ray photoemission and x-ray photoabsorption were used to study the composition and the electronic structure of ytterbium-doped strontium fluoroapatite (Yb:S-FAP). High resolution photoemission measurements on the valence band electronic structure and Sr 3d, P 2p and 2s, Yb 4d and 4p, F 1s and O 1s core lines were used to evaluate the surface and near surface chemistry of this fluoroapatite. Element specific density of unoccupied electronic states in Yb:S-FAP were probed by x-ray absorption spectroscopy (XAS) at the Yb 4d (N4,5-edge), Sr 3d (M4,5-edge), P 2p (L2,3-edge), F 1s and O 1s (K-edges) absorption edges. These results provide the first measurements of the electronic structure and surface chemistry of this material.

Nelson, Art J.(LLNL) [LLNL; Van Buuren, Tony W.(LLNL) [LLNL; Bostedt, C (Lawrence Livermore National Laboratory) [Lawrence Livermore National Laboratory; Schaffers, K I.(Lawrence Livermore National Laboratory) [Lawrence Livermore National Laboratory; Terminello, L J.(Lawrence Livermore National Laboratory) [Lawrence Livermore National Laboratory; Engelhard, Mark H.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB); Baer, Donald R.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB)

2002-04-15

202

Photoemission and Photoabsorption Investigation of the Electronic Structure of Ytterbium Doped Strontium Fluoroapatite  

SciTech Connect

X-ray photoemission and x-ray photoabsorption were used to study the composition and the electronic structure of ytterbium doped strontium fluoroapatite (Yb:S-FAP). High resolution photoemission measurements on the valence band electronic structure was used to evaluate the density of occupied states of this fluoroapatite. Element specific density of unoccupied electronic states in Yb:S-FAP were probed by x-ray absorption spectroscopy (XAS) at the Yb 4d (N{sub 4,5}-edge), Sr 3d (M{sub 4,5}-edge), P 2p (L{sub 2,3}-edge), F 1s and O 1s (K-edges) absorption edges. These results provide the first measurements of the electronic structure and surface chemistry of this material.

Nelson, A J; van Buuren, T; Bostedt, C; Schaffers, K I; Terminello, L

2001-07-13

203

Dopant segregated Schottky barrier nanowire transistors using low-temperature microwave annealed ytterbium silicide  

NASA Astrophysics Data System (ADS)

Thermal budget is one of the major concerns to fabricate three-dimensional (3D) transistors using practical CMOS technologies. In this work, low-temperature microwave annealing is utilized for the fabrication of dopant segregated Schottky barrier gate-all-around nanowire transistors. Low electron Schottky barrier of ytterbium silicide was combined with Phosphorus segregation to form metallic source/drain for high-performance N-channel nanowire transistors. Effects of microwave annealing on metal silicidation as well as dopants segregation are intensively examined by comparing with those using rapid thermal annealing. The minimum microwave power of 200% and processing time of 200 s can be used during annealing to minimize the thermal energy while retaining sufficient activation and silicidation. Experimental results show that the microwave annealing produce better electrical characteristics of dopant segregated Schottky barrier nanowire transistors, serving as a promising approach to fabricate metallic source/drain nanowire transistors for future 3D integration of CMOS technologies.

Huang, Ming-Kun; Shih, Chun-Hsing; Wu, Wen-Fa

2014-11-01

204

Diode-pumped 1028 nm Ytterbium-doped fiber laser with near 90% slope efficiency  

NASA Astrophysics Data System (ADS)

Highly efficient laser action from an Ytterbium-doped fiber (YDF) is demonstrated using a fiber Bragg grating (FBG) in conjunction with a 4% Fresnel reflection at room temperature. The YDF used is drawn from Yb2O3-doped preform, fabricated through deposition of porous layer of composition SiO2-GeO2 by the MCVD process in conjunction with a solution doping technique. The fabricated YDF has a core composition of 0.2 wt % of Yb2O3, 1.8 wt % of Al2O3 and 23 wt % of GeO2 with a pump absorption of 9.0 dB/m. The fiber laser operates at wavelength of 1028 nm with a slope efficiency of 88% with respect to the launched 976 nm pump power using the YDF length of 7 m.

Harun, S. W.; Paul, M. C.; Moghaddam, M. R. A.; Das, S.; Sen, R.; Dhar, A.; Pal, M.; Bhadra, S. K.; Ahmad, H.

2010-03-01

205

Bis(pentamethylcyclopentadienyl)ytterbium: An investigation of weak interactions in solution using multinuclear NMR spectroscopy  

SciTech Connect

NMR spectroscopy is ideal for studying weak interactions (formation enthalpy {le}20 kcal/mol) in solution. The metallocene bis(pentamethylcyclopentadienyl)ytterbium, Cp*{sub 2}Yb, is ideal for this purpose. cis-P{sub 2}PtH{sub 2}complexes (P = phosphine) were used to produce slow-exchange Cp*{sub 2}YbL adducts for NMR study. Reversible formation of (P{sub 2}PtH){sub 2} complexes from cis-P{sub 2}PtH{sub 2} complexes were also studied, followed by interactions of Cp*{sub 2}Yb with phosphines, R{sub 3}PX complexes. A NMR study was done on the interactions of Cp*{sub 2}Yb with H{sub 2}, CH{sub 4}, Xe, CO, silanes, stannanes, C{sub 6}H{sub 6}, and toluene.

Schwartz, D.J.

1995-07-01

206

Thermodynamics of the ytterbium-lead system by simultaneous weight-loss-mass-spectrometry Knudsen effusion  

SciTech Connect

The ytterbium-lead system was investigated in the temperature range 750 to 1381 K by measurements of vapor pressures with a simultaneous weight-loss-mass-spectrometric (WLMS) Knudsen effusion technique. A congruently vaporizing phase was located at YbPb/sub 1/ /sub 04/. The nonstoichiometric composition ranges of the intermetallic compounds were determined, and a Yb-Pb phase diagram was constructed. The heats of formation at 298 K calculated from the thermodynamic measurements were as follows(kJ/mol): Yb/sub 2/Pb, -174.6; Yb/sub 5/Pb/sub 3/, -461.6; YbPb, -116.9; YbPb/sub 3/, -152.4. 15 figures.

Schiffman, R.A.

1982-09-16

207

8-Quinolinolate complexes of yttrium and ytterbium: molecular arrangement and fragmentation under laser impact.  

PubMed

New 8-quinolinolate (Q) complexes of yttrium (1) and ytterbium (2) were synthesized by the reactions of Cp3Y and Yb[N(SiMe3)2]3 with 3 equiv. of 8-hydroxyquinoline in a DME solution. Single crystal X-ray analysis revealed the trinuclear molecular structure of the compounds Ln3Q9. The LDI-TOFMS investigation displayed that under the laser impact the compounds split off Q(-) anions to give Ln3Q8(+), Ln2Q5(+) and LnQ3(+) moieties. In the negative mode spectra the anions Q(-) and LnQ4(-) were observed. The DFT calculations showed the decreased stability of cationic Ln-quinolinolate as compared with their anionic counterparts. Complex 2 which is used as an emitter in a three-layer OLED displayed a metal-centered emission at 979 nm and an intensity of 50 ?W cm(-2) at 15.5 V. PMID:24048370

Baranov, Evgeny V; Fukin, Georgy K; Balashova, Tatyana V; Pushkarev, Anatoly P; Grishin, Ivan D; Bochkarev, Mikhail N

2013-11-28

208

Arc fusion splicing effects in large-mode-area single-mode ytterbium-doped fibers.  

PubMed

For the first time the effects of arc fusion splicing on the residual stress and refractive index of large-mode-area single-mode ytterbium-doped fibers (YDFs) are investigated using a state-of-the-art three-dimensional concurrent stress-index measurement method. The results, based on a commercially available fiber, describe a host of perturbations that decrease the core/cladding refractive index difference by as much as 1.74 × 10(-3) over an axial length of many hundreds of wavelengths. Simulations indicate that these perturbations result in an expansion of the mode-field-diameter by 39.6% and, based on the measured sample, result in an extra splice loss of 20.8%. The results of this investigation will be useful in the design and optimization of high-power all-fiber YDF lasers and amplifiers. PMID:24216728

Feng, Ting; Jenkins, Micah H; Yan, Fengping; Gaylord, Thomas K

2013-11-10

209

Production and characteristics of composite nanopowders using a fiber ytterbium laser  

NASA Astrophysics Data System (ADS)

A fiber ytterbium laser is used to obtain weakly aggregated nanopowders for yttria-stabilized zirconia solid electrolytes, ZnO and ZnS phosphors, and YAG- and Y2O3-based optical ceramics. The characteristics of the nanopowders are reported. The productivity and energy consumptions of the process with the use of fiber and CO2 lasers are compared. The influence of the buffer gas pressure in the evaporation chamber on the specific surface area of the nanopowder and particle size distribution is studied. The elemental composition of nanoparticles is found to change relative to the composition of the target when yttrium aluminum garnet is evaporated. In the pulsed mode of operation, the energy needed for nanopowder production is minimal when the radiation pulse is about 100 ?s long.

Kotov, Yu. A.; Samatov, O. M.; Ivanov, M. G.; Murzakaev, A. M.; Medvedev, A. I.; Timoshenkova, O. R.; Demina, T. M.; V'yukhina, I. V.

2011-05-01

210

The dawn of computer-assisted robotic osteotomy with ytterbium-doped fiber laser.  

PubMed

Currently, laser radiation is used routinely in medical applications. For infrared lasers, bone ablation and the healing process have been reported, but no laser systems are established and applied in clinical bone surgery. Furthermore, industrial laser applications utilize computer and robot assistance; medical laser radiations are still mostly conducted manually nowadays. The purpose of this study was to compare the histological appearance of bone ablation and healing response in rabbit radial bone osteotomy created by surgical saw and ytterbium-doped fiber laser controlled by a computer with use of nitrogen surface cooling spray. An Ytterbium (Yb)-doped fiber laser at a wavelength of 1,070 nm was guided by a computer-aided robotic system, with a spot size of 100 ?m at a distance of approximately 80 mm from the surface. The output power of the laser was 60 W at the scanning speed of 20 mm/s scan using continuous wave system with nitrogen spray level 0.5 MPa (energy density, 3.8 × 10(4) W/cm(2)). Rabbits radial bone osteotomy was performed by an Yb-doped fiber laser and a surgical saw. Additionally, histological analyses of the osteotomy site were performed on day 0 and day 21. Yb-doped fiber laser osteotomy revealed a remarkable cutting efficiency. There were little signs of tissue damage to the muscle. Lased specimens have shown no delayed healing compared with the saw osteotomies. Computer-assisted robotic osteotomy with Yb-doped fiber laser was able to perform. In rabbit model, laser-induced osteotomy defects, compared to those by surgical saw, exhibited no delayed healing response. PMID:24241973

Sotsuka, Yohei; Nishimoto, Soh; Tsumano, Tomoko; Kawai, Kenichiro; Ishise, Hisako; Kakibuchi, Masao; Shimokita, Ryo; Yamauchi, Taisuke; Okihara, Shin-ichiro

2014-05-01

211

Single-frequency ytterbium-doped fiber laser at 976 nm  

NASA Astrophysics Data System (ADS)

Linearly polarized wavelength stable single frequency ytterbium (Yb3+) doped fiber lasers below 1 ?m, namely threelevel Yb3+ fiber lasers, are highly demanded for nonlinear wavelength conversion to generate coherent blue light or even deep ultraviolet coherent sources. We present performance of a 976 nm single-frequency core-pumped distributed Bragg reflector (DBR) fiber laser consisting of a 2-cm long highly ytterbium-doped phosphate fiber and a pair of silica fiber Bragg gratings (FBGs) and their use for frequency doubling experiment. The high reflection (HR > 99%) and partial reflection (PR = 60%) FBGs were cleaved very close to the index modulation region and directly spliced to a 2-cm-long highly Yb3+-doped phosphate fiber. Over 100 mW of linearly polarized output with a linewidth less than 2 kHz can be obtained when the launched pump power is about 450 mW. The efficiency of the 976 nm single-frequency fiber laser (the output power vs the launched pump power) is about 25%. The relative intensity noise was measured to be -110 dB/Hz at 1 MHz and the variation of the center wavelength is less than 0.0005 nm during a measurement period of 2.5 hours. This single-frequency fiber laser has an SNR of over 50 dB and there is no strong ASE or spurious lasing at long wavelengths even at the maximum pump power. This all-fiber single-frequency DBR laser with attractive features can be used for efficient blue and UV generation through nonlinear frequency conversion. Moreover, this high-performance 976 nm single-frequency fiber laser can be used as a single-frequency, low RIN pump laser for long wavelength Yb3+-, Er3+-, or Yb3+/Er3+-doped fiber lasers and amplifiers.

Zhu, X.; Shi, W.; Zong, J.; Nguyen, D.; Norwood, R. A.; Chavez-Pirson, A.; Peyghambarian, N.

2013-02-01

212

Protein Phosphatase-1 Activates CDK9 by Dephosphorylating Ser175  

PubMed Central

The cyclin-dependent kinase CDK9/cyclin T1 induces HIV-1 transcription by phosphorylating the carboxyterminal domain (CTD) of RNA polymerase II (RNAPII). CDK9 activity is regulated by protein phosphatase-1 (PP1) which was previously shown to dephosphorylate CDK9 Thr186. Here, we analyzed the effect of PP1 on RNAPII phosphorylation and CDK9 activity. The selective inhibition of PP1 by okadaic acid and by NIPP1 inhibited phosphorylation of RNAPII CTD in vitro and in vivo. Expression of the central domain of NIPP1 in cultured cells inhibited the enzymatic activity of CDK9 suggesting its activation by PP1. Comparison of dephosphorylation of CDK9 phosphorylated by (32P) in vivo and dephosphorylation of CDK9's Thr186 analyzed by Thr186 phospho-specific antibodies, indicated that a residue other than Thr186 might be dephosphorylated by PP1. Analysis of dephosphorylation of phosphorylated peptides derived from CDK9's T-loop suggested that PP1 dephosphorylates CDK9 Ser175. In cultured cells, CDK9 was found to be phosphorylated on Ser175 as determined by combination of Hunter 2D peptide mapping and LC-MS analysis. CDK9 S175A mutant was active and S175D – inactive, and dephosphorylation of CDK9's Ser175 upregulated HIV-1 transcription in PP1-dependent manner. Collectively, our results point to CDK9 Ser175 as novel PP1-regulatory site which dephosphorylation upregulates CDK9 activity and contribute to the activation of HIV-1 transcription. PMID:21533037

Ammosova, Tatiana; Obukhov, Yuri; Kotelkin, Alexander; Breuer, Denitra; Beullens, Monique; Gordeuk, Victor R.; Bollen, Mathieu; Nekhai, Sergei

2011-01-01

213

Erbium:Ytterbium Codoped Large-Core Fiber Laser With 297-W Continuous-Wave Output Power  

Microsoft Academic Search

We have demonstrated a high-power and high-efficiency erbium:ytterbium (Er:Yb) codoped fiber laser that produces 297 W of continuous-wave output at 1567 nm. The slope efficiency with respect to the launched pump power changed from 40% to 19% at higher output power due to the onset of Yb colasing at 1067 nm. However, the Yb colasing was essential for the suppression

Yoonchan Jeong; Seongwoo Yoo; C. A. Coderaard; Johan Nilsson; Jayanta K. Sahu; David N. Payne; R. Horley; P. W. Turner; Louise Hickey; Andrew Harker; Mike Lovelady; Andy Piper

2007-01-01

214

A new approach to prepare nanoscopic rare earth metal fluorides: the fluorolytic sol-gel synthesis of ytterbium fluoride.  

PubMed

A new approach for the preparation of approx. 5 nm sized ytterbium fluoride nanoparticles based on the fluorolytic sol-gel route is reported. DLS, TEM, IR and XRD were used to characterize the particles as well as the aging behavior of the sols. Furthermore, a new Yb(III) complex was isolated from the precursor solution and characterized by X-ray single crystal structure determination. PMID:24824632

Schmidt, L; Dimitrov, A; Kemnitz, E

2014-06-25

215

Fundamental-mode operation in polarization-maintaining ytterbium-doped fiber with an effective area of 1400 ?m2  

NASA Astrophysics Data System (ADS)

We report, for the first time to our knowledge, fundamental-mode operation in polarization-maintaining ytterbium-doped fiber with an effective area of ˜1400 ?m2 and birefringence of 2.1×10-4. The measured critical bending radius, Rc, defined as the radius at which the loss is equal to 3 dB for 1 m of fiber, is ˜4 cm. Lasing with slope efficiency exceeding 60% and M2 of 1.2 has also been demonstrated.

Peng, Xiang; Dong, Liang

2007-02-01

216

Broad-band diode-pumped ytterbium-doped fiber amplifier with 34dBm output power  

Microsoft Academic Search

We investigate a high-power diode-pumped double-clad ytterbium-doped fiber amplifier with 34-dBm average output power and 1050-1095-nm bandwidth. A multidiode concentrator pumps the amplifier at 980 nm, with ~6 W of power launched into the inner cladding. Besides CW-signals, we amplify pulses from a mode-locked laser to 1 kW of peak power with only minor nonlinear distortions as well as pulses

J. M. Sousa; J. Nilsson; C. C. Renaud; J. A. Alvarez-Chavez; A. B. Grudinin; J. D. Minelly

1999-01-01

217

The Gain Characters and Optimization of the Double-Pass Two-Stage Ytterbium-Doped Fiber Amplifier  

Microsoft Academic Search

The amplifier chains are always the important parts of fiber amplifiers. In this paper, the gain characters of double-pass two-stage ytterbium-doped fiber amplifier were analyzed in theory. Firstly, the gain and output characters were also demonstrated when the signal power and pump power changed. Secondly, the relationship between gain and the ratio of the two fibers was analyzed when the

Liu Yan; Zhang Yuanyuan; Xiao Yanshan; Lu Yutian

2009-01-01

218

Erbium\\/ytterbium co-doped double clad fiber amplifier, its applications and effects in fiber optic communication systems  

Microsoft Academic Search

Increased demand for larger bandwidth and longer inter-amplifiers distances translates to higher power budgets for fiber optic communication systems in order to overcome large splitting losses and achieve acceptable signal-to-noise ratios. Due to their unique design ytterbium sensitized erbium doped, double clad fiber amplifiers; offer significant increase in the output powers that can be obtained. In this thesis we investigate,

Puneit Dua

2005-01-01

219

Influence of the addition of erbium and ytterbium triflates in the curing kinetics of a DGEBA\\/ o -tolybiguanide powder mixture  

Microsoft Academic Search

Solid bisphenol-A epoxy resin (DGEBA) of medium molecular mass was cured using o-tolylbiguanide (TBG) as cross-linking agent. In order to improve the kinetics of the reactive system, two Lewis acid catalysts\\u000a (erbium(III) and ytterbium(III) trifluoromethanesulfonates) were added in proportions of 1 phr. The kinetic study was performed\\u000a by dynamic scanning calorimetry (DSC) and the complete kinetic triplet (E, A and

S. J. García; A. Serra; X. Ramis; J. Suay

2007-01-01

220

Ytterbium-doped fibre laser tunable in the range 1017 - 1040 nm with second-harmonic generation  

SciTech Connect

A cladding-pumped ytterbium-doped fibre laser has been tuned to shorter emission wavelengths (from 1040 to 1017 nm). The laser output power obtained has been compared to calculation results. We have studied frequency doubling of the laser in a KTiOPO{sub 4} (KTP) crystal with type II phase matching in the XY plane and demonstrated wavelength tuning in the range 510 - 520 nm. (lasers)

Dontsova, E I; Kablukov, S I; Babin, Sergei A

2013-05-31

221

Author's personal copy Artificial Intelligence 175 (2011) 958987  

E-print Network

Author's personal copy Artificial Intelligence 175 (2011) 958­987 Contents lists available at ScienceDirect Artificial Intelligence www.elsevier.com/locate/artint Computer poker: A review Jonathan f o a b s t r a c t Article history: Received 19 February 2010 Accepted 21 December 2010 Available

Watson, Ian

222

Behavioural Brain Research 175 (2006) 9095 Research report  

E-print Network

Behavioural Brain Research 175 (2006) 90­95 Research report Influence of parenting style September 2006 Abstract We investigated the association between variation in parenting style maternal behaviour. © 2006 Elsevier B.V. All rights reserved. Keywords: Parenting style; Early experience

Maestripieri, Dario

223

JOURNAL OF CATALYSIS 175, 220225 (1998) ARTICLE NO. CA982016  

E-print Network

JOURNAL OF CATALYSIS 175, 220­225 (1998) ARTICLE NO. CA982016 Enhanced Catalytic Activity of Air-Calcined, 1998 The catalytic activity of the air-calcined catalyst of CrF3 · 4H2O for the fluorination reaction the Fermi energy level in this catalyst. The increased catalytic activity of the air- calcined sample

Kim, Sehun

224

27 CFR 25.175 - Prepayment of tax.  

Code of Federal Regulations, 2012 CFR

...TRADE BUREAU, DEPARTMENT OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax...22, is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a...

2012-04-01

225

19 CFR 122.175 - Exemption from penalties.  

Code of Federal Regulations, 2010 CFR

19 Customs Duties 1 2010-04-01 2010-04-01...Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER...test of highest degree of care and diligence required under...presentation before the port director or his designee, that...

2010-04-01

226

46 CFR 175.600 - Incorporation by reference.  

Code of Federal Regulations, 2013 CFR

...Purposes and Pressure Vessels (“ASTM B 96”) 182.440. ASTM B 117-97, Standard Practice for Operating Salt Spray (Fog) Apparatus (“ASTM B 117”) 175.400. ASTM B 122/B 122M-95, Standard Specification for Copper-Nickel-Tin...

2013-10-01

227

46 CFR 175.600 - Incorporation by reference.  

Code of Federal Regulations, 2012 CFR

...Purposes and Pressure Vessels (“ASTM B 96”) 182.440. ASTM B 117-97, Standard Practice for Operating Salt Spray (Fog) Apparatus (“ASTM B 117”) 175.400. ASTM B 122/B 122M-95, Standard Specification for Copper-Nickel-Tin...

2012-10-01

228

[Immunopharmacological actions of 6-amidino-2-naphthyl-4-guanidinobenzoate (FUT-175). 2. Effect of FUT-175 on immunological reactions in man].  

PubMed

FUT-175 is a new anti-complemental drug which strongly inhibits complement-mediated allergic reactions in animals. It was reported that FUT-175 does not affect both antibody formation and host defense to bacterial infection in mice. The present study was undertaken to examine the effects of FUT-175 on various immunological reactions in humans. FUT-175 dose-dependently decreased the antigen-induced anaphylactic histamine release from leukocytes of atopic patients. However, i.d. treatment of FUT-175 neither inhibited antigen- or compound 48/80-induced immediate type skin reactions in atopic patients nor antigen-induced early, late or delayed type skin reactions in Candida-sensitive patients. FUT-175 also did not inhibit the PPD-mediated delayed type skin reaction in healthy subjects. FUT-175 at a dose of 10(-4)M but not at 10(-8) to 10(-5)M significantly decreased the proliferation of human atopic peripheral blood lymphocytes (PBL) caused by mite antigen, concanavalin A or pokeweed mitogen. 51Cr release from human PBL was slightly enhanced by FUT-175 at a dose range of 10(-6) to 10(-4)M. FUT-175 did not change the number of SIg receptors or C3 receptors on human B cells. FUT-175 hardly affected the nitroblue tetrazolium reduction test and Escherichia coli-mediated chemotaxis in human neutrophils. These results strongly suggest that FUT-175 does not affect immunological functions and host defense in humans. PMID:6194081

Yanagihara, Y; Tonami, Y; Soma, Y; Ishizaki, M; Miyamoto, Y; Yui, Y; Shida, T

1983-06-01

229

Gamma-radiation-induced degradation of actively pumped single-mode ytterbium-doped optical fibers  

NASA Astrophysics Data System (ADS)

The integration of optical components into the digital processing units of satellite subsystems has the potential to remove interconnect bottlenecks inherent to the volume, mass, complexity, reliability and crosstalk issues of copper-based interconnects. Assuming on-board high-bandwidth communications will utilize passive optical fibers as a communication channel, this work investigates the impact of gamma irradiation from a Co-60 source on both passive optical fibers and ytterbium-doped single-mode fibers operated as amplifiers for a 1060-nm light source. Standard optical patch cables were evaluated along with active Yb-doped double-clad fibers. Varied exposure times and signal transmission wavelengths were used to investigate the degradation of the fibers exposed to total doses above 100 krad (Si). The effect on the amplified signal gain was studied for the Yb-doped fibers. The increased attenuation in the fibers across a broad wavelength range in response to multiple levels of gamma radiation exposure along with the effect that the increased attenuation has on the actively pumped Yb-doped fiber amplifier performance, is discussed.

Singleton, B.; Petrosky, J.; Pochet, M.; Usechak, N. G.; Francis, S. A.

2014-03-01

230

All-fiber Q-switched ytterbium-doped fiber laser in MOPA configurations  

NASA Astrophysics Data System (ADS)

An all fiber Q-switched Ytterbium-Doped Fiber "YDF" laser in Master Oscillator Power-Amplifier (MOPA) configuration is proposed theoretically and demonstrated experimentally, and the principle analysis and experimental verification are presented in details. Firstly, the system configuration is designed. The system is composed of the seed and the amplifier stage. Two 915nm LDs are used for pumping light, and the light is coupled into the gain medium of the seed and the amplifier stage by two combiners, respectively. Two Fiber Bragg Gratings (FBGs) are used as ends of the cavity of the seed. One Q-switch is used to modulate output laser of the seed, and the amplifier stage is adopted to amplify the light behind the seed. Then, 10m YDF with single mode is selected for the gain medium of the seed, and 8m YDF with multimode is used as the gain medium of the amplifier stage. The output laser of the seed with a 1.02W average power is realized when the seed pump power is 5.74W, the repetition rate is 20KHz and the action time of the Q-switch is 3.5?s. Meanwhile, a 7.58W pump power of the amplifier stage is used to amplify the seed laser. Finally, output laser with the pulse width of 90ns and the average output power of 4.93W are achieved.

He, Wei; Zhu, Lianqing; Zhang, Yinmin; Dong, Mingli; Chen, Xiaohuai

2013-10-01

231

An Early Investigation of Ytterbium Nanocolloids for Selective and Quantitative "Multi-color" Spectral CT Imaging  

PubMed Central

We report a novel molecular imaging agent based on Ytterbium (Yb) designed for use with Spectral “multi-color” Computed Tomogrphy (CT). Spectral CT or multi-ycolored CT provides all of the benefits of traditional CT, i.e., rapid tomographic X-ray imaging, but in addition, it simultaneously discriminates metal-rich contrast agents based on the elements unique x-ray K-edge energy signature. Our synthetic approach involved the use of organically soluble Yb(III)-complex to produce nanocolloids of Yb of noncrystalline nature incorporating high density of Yb (>500K/nanoparticle) into a stable metal particle. The resultant particles are constrained to vasculature (~200nm) and are highly selective for binding fibrin in the ruptured atherosclerotic plaque. Nanoparticles exhibited excellent signal sensitivity and the spectral CT technique uniquely discriminates the k-edge signal (60keV) of Yb from calcium (bones). Bio-elimination and preliminary bio-distribution studied reflected the overall safety and defined clearance of these particles in a rodent model. PMID:22385324

Pan, Dipanjan; Schirra, Carsten O.; Senpan, Angana; Schmieder, Anne H.; Stacy, Allen J.; Roessl, Ewald; Thran, Axel; Wickline, Samuel A.; Proska, Roland; Lanza, Gregory M.

2012-01-01

232

21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.  

Code of Federal Regulations, 2010 CFR

...true Partial phosphoric acid esters of polyester resins. 175.260 Section 175.260...260 Partial phosphoric acid esters of polyester resins. Partial phosphoric acid esters of polyester resins identified in this section...

2010-04-01

233

21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.  

Code of Federal Regulations, 2011 CFR

...false Partial phosphoric acid esters of polyester resins. 175.260 Section 175.260...260 Partial phosphoric acid esters of polyester resins. Partial phosphoric acid esters of polyester resins identified in this section...

2011-04-01

234

14 CFR 125.175 - Protection of other airplane components against fire.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 false Protection of other airplane components against fire. 125.175...OPERATIONS CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR...Requirements § 125.175 Protection of other airplane components against fire. (a)...

2011-01-01

235

14 CFR 125.175 - Protection of other airplane components against fire.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Protection of other airplane components against fire. 125.175...OPERATIONS CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR...Requirements § 125.175 Protection of other airplane components against fire. (a)...

2013-01-01

236

40 CFR 417.175 - Standards of performance for new sources.  

Code of Federal Regulations, 2010 CFR

...Section 417.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS SOAP AND DETERGENT MANUFACTURING POINT SOURCE CATEGORY Manufacture of Detergents by Dry Blending Subcategory § 417.175...

2010-07-01

237

25 CFR 170.175 - What Indian LTAP-sponsored transportation training and educational opportunities exist?  

Code of Federal Regulations, 2010 CFR

...transportation training and educational opportunities exist? 170.175 Section 170...Ltap-Sponsored Education and Training Opportunities § 170.175 What Indian LTAP-sponsored...transportation training and educational opportunities exist? There are many...

2010-04-01

238

49 CFR 17.5 - What is the Secretary's obligation with respect to Federal interagency coordination?  

Code of Federal Regulations, 2013 CFR

...with respect to Federal interagency coordination? 17.5 Section 17.5 Transportation...with respect to Federal interagency coordination? The Secretary, to the extent...agencies in an effort to assure full coordination between such agencies and the...

2013-10-01

239

29 CFR 17.5 - What is the Secretary's obligation with respect to Federal interagency coordination?  

...with respect to Federal interagency coordination? 17.5 Section 17.5 Labor...with respect to Federal interagency coordination? The Secretary, to the extent...agencies in an effort to assure full coordination between such agencies and the...

2014-07-01

240

21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.  

...2014-04-01 false Partial phosphoric acid esters of polyester resins. 175.260...Coatings § 175.260 Partial phosphoric acid esters of polyester resins. Partial phosphoric acid esters of polyester resins identified...

2014-04-01

241

49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).  

...2014-10-01 false Handling requirements for carbon dioxide, solid (dry ice). 175.900 Section...175.900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice) when shipped...

2014-10-01

242

26 CFR 1.175-3 - Definition of “the business of farming.”  

Code of Federal Regulations, 2010 CFR

...false Definition of âthe business of farming.â 1.175-3 Section 1.175-3...175-3 Definition of “the business of farming.” The method described in section...taxpayer engaged in “the business of farming”. A taxpayer is engaged in the...

2010-04-01

243

45 CFR 286.175 - What special provisions apply in Alaska?  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false What special provisions apply in Alaska? 286.175 Section 286.175 Public Welfare...286.175 What special provisions apply in Alaska? A Tribe in the State of Alaska that receives a TFAG must use the grant to...

2012-10-01

244

45 CFR 286.175 - What special provisions apply in Alaska?  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false What special provisions apply in Alaska? 286.175 Section 286.175 Public Welfare...286.175 What special provisions apply in Alaska? A Tribe in the State of Alaska that receives a TFAG must use the grant to...

2010-10-01

245

45 CFR 286.175 - What special provisions apply in Alaska?  

Code of Federal Regulations, 2013 CFR

...2012-10-01 true What special provisions apply in Alaska? 286.175 Section 286.175 Public Welfare...286.175 What special provisions apply in Alaska? A Tribe in the State of Alaska that receives a TFAG must use the grant to...

2013-10-01

246

45 CFR 286.175 - What special provisions apply in Alaska?  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false What special provisions apply in Alaska? 286.175 Section 286.175 Public Welfare...286.175 What special provisions apply in Alaska? A Tribe in the State of Alaska that receives a TFAG must use the grant to...

2011-10-01

247

21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.  

...2014-04-01 false Vinyl acetate/crotonic acid copolymer. 175.350 Section 175.350... § 175.350 Vinyl acetate/crotonic acid copolymer. A copolymer of vinyl acetate and crotonic acid may be safely used as a coating or...

2014-04-01

248

High-repetition rate mode-locked ytterbium fiber laser using dichroic fiber mirrors and photonic bandgap fiber technology  

NASA Astrophysics Data System (ADS)

We demonstrate here an all-fiber passively mode-locked laser using an integrated fiber-end mirror and photonic band-gap fiber-based dispersion compensator. The refined technology of thin-film coatings made with electron beam evaporation on a single-mode fiber facet results in a compact dichroic pump combiner/output coupler. The dichroic mirror made of ZrO II and SiO II provides a low reflectivity (0.4 %) for the 980 nm pump and over 40 % reflectivity for the 1040 nm signal wavelength, which enabled us to build a short-length mode-locked ytterbium fiber laser. The laser cavity consisted of 8 cm of highly doped ytterbium fiber, 10 cm of anomalous dispersion photonic bandgap fiber, a semiconductor saturable absorber mirror (SESAM) and the dichroic mirror. Pump and signal wavelengths were separated by a fiber coupler placed outside the cavity contrary to conventional geometry. A butt-coupled SESAM provided reliable self-starting at a pump power of 150 mW. The all-fiber design using dichroic fiber mirror combined with photonic bandgap fiber dispersion compensator is highly stable and requires virtually no alignment. The mode-locked laser produces 572-fs soliton pulses at 571.03 MHz fundamental repetition rate. To the best of our knowledge, this is the highest fundamental repetition rate fiber laser operating around 1 ?m reported to date.

Orsila, Lasse; Herda, Robert; Okhotnikov, Oleg G.

2008-02-01

249

One?Step Reaction of Friedel–Crafts Acylation and Demethylation of Aryl?Methyl Ethers Catalyzed by Ytterbium(III) Triflate  

Microsoft Academic Search

Catalytic amount of ytterbium(III) triflate [Yb(OTf)3] has been used to catalyze Friedel–Crafts acylation and demethylation of aryl?methyl ethers in one?step reaction to produce hydroxyacylphenones with moderate yields under mild conditions.

Weike Su; Can Jin

2004-01-01

250

Ytterbium-and chromium-doped fibre laser: from chaotic self-pulsing to passive Q-switching. Bernard Dussardier1  

E-print Network

Ytterbium- and chromium-doped fibre laser: from chaotic self-pulsing to passive Q mode of operation using a chromium-doped saturable absorber fibre. This original all-fibre laser-fibre laser", Electron. Lett., 39, 1307 (2003) [iii] V. Felice et al., "Chromium-doped silica optical fibres

Paris-Sud XI, Université de

251

A physical model of the photo- and radiation-induced degradation of ytterbium-doped silica optical fibres  

NASA Astrophysics Data System (ADS)

We propose a model to describe the photo- or/and the radiation-induced darkening of ytterbium-doped silica optical fibers. This model accounts for the well-established experimental features of photo-darkening. Degradation behaviors predicted for fibers pumped in harsh environments are also fully confirmed by experimental data reported in the work by Duchez et al. (this proceeding), which gives a detailed characterization of the interplay between the effects of the pump and those of a superimposed ionizing irradiation (actual operation conditions in space-based applications for instance). In particular, dependences of the darkening build-up on the pump power, the total ionizing dose and the dose rate are all correctly reproduced. The presented model is a `sufficient' one, including the minimal physical ingredients required to reproduce experimental features. Refinements could be proposed to improve, e.g., quantitative kinetics.

Mady, Franck; Duchez, Jean-Bernard; Mebrouk, Yasmine; Benabdesselam, Mourad

2014-10-01

252

Picosecond to femtosecond pulses from high power self mode-locked ytterbium rod-type fiber laser.  

PubMed

We have designed an ytterbium rod-type fiber laser oscillator with tunable pulse duration. This system that delivers more than 10 W of average power is self mode-locked. It yields femtosecond to picosecond laser pulses at a repetition rate of 74 MHz. The pulse duration is adjusted by changing the spectral width of a band pass filter that is inserted in the laser cavity. Using volume Bragg gratings of 0.9 nm and 0.07 nm spectrum bandwidth, this oscillator delivers nearly Fourier limited 2.8 ps and 18.5 ps pulses, respectively. With a 4 nm interference filter, one obtains picosecond pulses that have been externally dechirped down to 130 fs. PMID:23669929

Deslandes, Pierre; Perrin, Mathias; Saby, Julien; Sangla, Damien; Salin, François; Freysz, Eric

2013-05-01

253

Creep Behavior of Hafnia and Ytterbium Silicate Environmental Barrier Coating Systems on SiC/SiC Ceramic Matrix Composites  

NASA Technical Reports Server (NTRS)

Environmental barrier coatings will play a crucial role in future advanced gas turbine engines because of their ability to significantly extend the temperature capability and stability of SiC/SiC ceramic matrix composite (CMC) engine components, thus improving the engine performance. In order to develop high performance, robust coating systems for engine components, appropriate test approaches simulating operating temperature gradient and stress environments for evaluating the critical coating properties must be established. In this paper, thermal gradient mechanical testing approaches for evaluating creep and fatigue behavior of environmental barrier coated SiC/SiC CMC systems will be described. The creep and fatigue behavior of Hafnia and ytterbium silicate environmental barrier coatings on SiC/SiC CMC systems will be reported in simulated environmental exposure conditions. The coating failure mechanisms will also be discussed under the heat flux and stress conditions.

Zhu, Dongming; Fox, Dennis S.; Ghosn, Louis J.; Harder, Bryan

2011-01-01

254

Slope efficiency over 30% single-frequency ytterbium-doped fiber laser based on Sagnac loop mirror filter.  

PubMed

A high-slope-efficiency single-frequency (SF) ytterbium-doped fiber laser, based on a Sagnac loop mirror filter (LMF), was demonstrated. It combined a simple linear cavity with a Sagnac LMF that acted as a narrow-bandwidth filter to select the longitudinal modes. And we introduced a polarization controller to restrain the spatial hole burning effect in the linear cavity. The system could operate at a stable SF oscillating at 1064 nm with the obtained maximum output power of 32 mW. The slope efficiency was found to be primarily dependent on the reflectivity of the fiber Bragg grating. The slope efficiency of multi-longitudinal modes was higher than 45%, and the highest slope efficiency of the single longitudinal mode we achieved was 33.8%. The power stability and spectrum stability were <2% and <0.1%, respectively, and the signal-to-noise ratio measured was around 60 dB. PMID:24085181

Yin, Mojuan; Huang, Shenghong; Lu, Baole; Chen, Haowei; Ren, Zhaoyu; Bai, Jintao

2013-09-20

255

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.  

Code of Federal Regulations, 2010 CFR

...Shipping 1 2010-10-01 2010-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section...PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A...

2010-10-01

256

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.  

Code of Federal Regulations, 2011 CFR

...Shipping 1 2011-10-01 2011-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section...PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A...

2011-10-01

257

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.  

Code of Federal Regulations, 2013 CFR

...Shipping 1 2013-10-01 2013-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section...PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A...

2013-10-01

258

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.  

Code of Federal Regulations, 2012 CFR

...Shipping 1 2012-10-01 2012-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section...PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A...

2012-10-01

259

33 CFR 165.T13-175 - Safety Zone; M/V DAVY CROCKETT, Columbia River.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Safety Zone; M/V DAVY CROCKETT, Columbia River. 165.T13-175...165.T13-175 Safety Zone; M/V DAVY CROCKETT, Columbia River. (a) Location...approximately 300 ft upriver from the M/V DAVY CROCKETT extending to 300 ft abreast...

2011-07-01

260

Artificial Intelligence 175 (2011) 20212060 Contents lists available at ScienceDirect  

E-print Network

Artificial Intelligence 175 (2011) 2021­2060 Contents lists available at ScienceDirect Artificial. In this paper, we argue that techniques from the field of artificial intelligence are instrumental to addressing. Stein et al. / Artificial Intelligence 175 (2011) 2021­2060 services may display significant uncertainty

Southampton, University of

261

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2012-07-01 true High-speed rail cars, monorails and systems. 1192.175 Section...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems,...

2013-07-01

262

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2010-10-01

263

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2011-10-01

264

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2012-10-01

265

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2013-10-01

266

High-power tunable single-frequency single-mode erbium:ytterbium codoped large-core fiber master-oscillator power amplifier source  

NASA Astrophysics Data System (ADS)

We present a cladding-pumped single-frequency, single-mode erbium:ytterbium codoped fiber master-oscillator power amplifier source generating up to 151 W of continuous-wave output power at 1563 nm with 33% slope efficiency and 20 dB gain. This source was also tunable and had a stable operation range of 1546 to 1566 nm at an output power level in excess of 125 W. The doped fiber exploited a large-core design for improved power handling and mitigation of stimulated Brillouin scattering. There was no sign of having stimulated Brillouin scattering even at the highest power. Despite a large core (V=12), the output beam was nearly diffraction limited (M2=1.1). The source showed slight rollover at over 100 W of output power because of the onset of emission from ytterbium, centered at 1060 nm.

Jeong, Y.; Sahu, J. K.; Soh, D. B. S.; Codemard, C. A.; Nilsson, J.

2005-11-01

267

High-power tunable single-frequency single-mode erbium:ytterbium codoped large-core fiber master-oscillator power amplifier source  

Microsoft Academic Search

We present a cladding-pumped single-frequency, single-mode erbium:ytterbium codoped fiber master-oscillator power amplifier source generating up to 151 W of continuous-wave output power at 1563 nm with 33% slope efficiency and 20 dB gain. This source was also tunable and had a stable operation range of 1546 to 1566 nm at an output power level in excess of 125 W. The

Y. Jeong; J. K. Sahu; D. B. S. Soh; C. A. Codemard; J. Nilsson

2005-01-01

268

Experimental demonstration of enhancing pump absorption rate in cladding-pumped ytterbium-doped fiber lasers using pump-coupling long-period fiber gratings  

Microsoft Academic Search

A long-period fiber grating (LPFG) was inscribed in a single-mode fiber and was spliced with a ytterbium (Yb)-doped double-clad fiber in order to couple pump radiation of the inner cladding into the core in a cladding-pumped fiber laser. The use of an LPFG permits a partial core-pumping scheme in a cladding-pumping fiber laser because a portion of the pump radiation

Seungin Baek; Sookyoung Roh; Yoonchan Jeong; Byoungho Lee

2006-01-01

269

Single-frequency, single-mode, plane-polarized ytterbium-doped fiber master oscillator power amplifier source with 264 W of output power  

Microsoft Academic Search

We present a single-frequency, single-mode, plane-polarized ytterbium-doped all-fiber master oscillator power amplifier source at 1060 nm generating 264 W of continuous-wave output power. The final-stage amplifier operated with a high gain of 19 dB and a high conversion efficiency of 68%. There was no evidence of rollover from stimulated Brillouin scattering even at the highest output power, and the maximum

Y. Jeong; J. Nilsson; J. K. Sahu; D. B. S. Soh; C. Alegria; P. Dupriez; C. A. Codemard; D. N. Payne; R. Horley; L. M. B. Hickey; L. Wanzcyk; C. E. Chryssou; J. A. Alvarez-Chavez; P. W. Turner

2005-01-01

270

An erbium\\/ytterbium co-doped double-cladding fiber amplifier with 36.4dBm output power  

Microsoft Academic Search

We have described a high-power hybrid fiber amplifier, which comprising an erbium \\/ ytterbium co-doped double-cladding fiber amplifier (EYCDFA) as a post-amplifier and a conventional erbium-doped fiber amplifier (EDFA) as a pre-amplifier. At the signal wavelength of 1550 nm, the signal gains of up to 71 dB and the maximum output powers of 36.4 dBm or 4.37 W have been

Zhen Guo Lu; Arnaud Lavigne; Peng Lin; Chander P. Grover

2004-01-01

271

Efficient alcoholysis of 5,6-dihydro-1,10-phenanthroline-5,6-epoxide with ytterbium(III) triflate and subsequent enantioselective transesterification with lipases  

PubMed Central

New 5,6-dihydro-1,10-phenanthroline derivatives were prepared in high yield via ytterbium(III) triflate-catalyzed alcoholysis of the corresponding epoxide. Enzymatic transesterifications of racemic alkoxy alcohols afforded enantioselective separations with up to 99% ee. The lipase derived from Burkholderia cepacia (PSCI) was the most efficient, with E-values of up to 200. The steric effect of substituents in the 6-position on reaction time and enantioselectivities was assessed. PMID:20160975

Schoffers, Elke; Kohler, Lars

2009-01-01

272

LASERS: Highly efficient cladding-pumped fibre laser based on an ytterbium-doped optical fibre and a fibre Bragg grating  

Microsoft Academic Search

Ytterbium-ion-doped double-clad optical fibres were developed. The differential quantum efficiency of a diode-pumped fibre laser, fabricated on the basis of such optical fibres with a fibre Bragg grating, was 90%. Bibtex entry for this abstract Preferred format for this abstract (see Preferences) Find Similar Abstracts: Use: Authors Title Abstract Text Return: Query Results Return items starting with number Query Form

Andrei S. Kurkov; V. I. Karpov; A. Yu Laptev; O. I. Medvedkov; Evgenii M. Dianov; A. N. Gur'yanov; Sergei A. Vasil'ev; Vladimir M. Paramonov; V. N. Protopopov; A. A. Umnikov; N. I. Vechkanov; V. G. Artyushenko; J. Frahm

1999-01-01

273

Power Scaling of Single-Frequency Ytterbium-Doped Fiber Master-Oscillator Power-Amplifier Sources up to 500 W  

Microsoft Academic Search

We discuss continuous-wave single-frequency master- oscillator power-amplifier (MOPA) sources based on ytterbium- doped fibers (YDFs) with particular attention to their recent advances and our experimental results. This includes a 402-W plane-polarized MOPA source and a 511-W random-polarized MOPA source. In these MOPAs, the final-stage high-power amplifier operates with high efficiency of 70%-80%, and a high gain of over 20 dB

Yoonchan Jeong; Johan Nilsson; Jayanta K. Sahu; David N. Payne; R. Horley; L. M. B. Hickey; P. W. Turner

2007-01-01

274

High Intensity Mirror-Free Nanosecond Ytterbium Fiber Laser System in Master Oscillator Power Amplification  

NASA Astrophysics Data System (ADS)

Rare-earth-doped fiber lasers and amplifiers are relatively easy to efficiently produce a stable and high quality laser beam in a compact, robust, and alignment-free configuration. Recently, high power fiber laser systems have facilitated wide spread applications in academics, industries, and militaries in replacement of bulk solid-state laser systems. The master oscillator power amplifier (MOPA) composed of a highly-controlled seed, high-gain preamplifiers, and high-efficiency power amplifiers are typically utilized to scale up the pulse energy, peak power, or average power. Furthermore, a direct-current-modulated nanosecond diode laser in single transverse mode can simply provide a compact and highly-controlled seed to result in the flexible output parameters, such as repetition rate, pulse duration, and even temporal pulse shape. However, when scaling up the peak power for high intensity applications, such a versatile diode-seeded nanosecond MOPA laser system using rare-earth-doped fibers is unable to completely save its own advantages compared to bulk laser systems. Without a strong seeding among the amplifiers, the guided amplified spontaneous amplification is easy to become dominant during the amplification, leading to the harmful self-lasing or pulsing effects, and the difficulty of the quantitative numerical comparison. In this dissertation, we study a high-efficiency and intense nanosecond ytterbium fiber MOPA system with good beam quality and stability for high intensity applications. The all-PM-fiber structure is achieved with the output extinction ratio of >12 dB by optimizing the interconnection of high power optical fibers. The diode-seeded MOPA configuration without parasitic stimulated amplification (PAS) is implemented using the double-pass scheme to extract energy efficiently for scaling peak power. The broadband PAS was studied experimentally, which matches well with our numerical simulation. The 1064-nm nanosecond seed was a direct-current-modulated Fabry-Perot diode laser associated with a weak and pulsed noise spanning from 1045 to 1063 nm. Even though the contribution of input noise pulse is only <5%, it becomes a significant transient spike during amplification. The blue-shifted pulsed noise may be caused by band filling effect for quantum-well seed laser driven by high peak current. The study helps the development of adaptive pulse shaping for scaling peak power or energy at high efficiency. On the other hand, the broadband spike with a 3-dB bandwidth of 8.8 nm can support pulses to seed the amplifier for sub-nanosecond giant pulse generation. Because of the very weak seed laser, the design of high-gain preamplifier becomes critical. The utilization of single-mode core-pumped fiber preamplifier can not only improve the mode contrast without fiber coiling effect but also significantly suppress the fiber nonlinearity. The double-pass scheme was therefore studied both numerically and experimentally to improve energy extraction efficiency for the lack of attainable seed and core-pumped power. As a result, a record-high peak power of > 30 kW and energy of > 0.23 mJ was successfully achieved to the best of our knowledge from the output of clad-pumped power amplifier with a beam quality of M2 ˜1.1 in a diode-seeded 15-microm-core fiber MOPA system. After the power amplifier, the MOPA conversion efficiency can be dramatically improved to >56% for an energy gain of >63 dB at a moderate repetition rate of 20 kHz with a beam quality of M 2 <1.5. The output energy of >1.1 mJ with a pulse duration of ˜6.1 ns can result in a peak power up to >116 kW which is limited by fiber fuse in long-term operation. Such a condition able to generate the on-target laser intensity of > 60 GW/cm2 for applications is qualified to preliminarily create a laser-plasma light source. Moreover, the related simulation results also reveal the double-passed power amplifier can further simplify MOPA. Such an intense clad-pumped power amplifier can further become a nonlinear fiber amplifier in al

Chun-Lin, Louis Chang

275

25 CFR 175.13 - Procedures for adjusting electric power rates to reflect changes in the cost of purchased power...  

Code of Federal Regulations, 2013 CFR

... Procedures for adjusting electric power rates to reflect changes in the cost of purchased power or energy. 175.13 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees,...

2013-04-01

276

25 CFR 175.13 - Procedures for adjusting electric power rates to reflect changes in the cost of purchased power...  

Code of Federal Regulations, 2011 CFR

... Procedures for adjusting electric power rates to reflect changes in the cost of purchased power or energy. 175.13 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees,...

2011-04-01

277

25 CFR 175.13 - Procedures for adjusting electric power rates to reflect changes in the cost of purchased power...  

... Procedures for adjusting electric power rates to reflect changes in the cost of purchased power or energy. 175.13 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees,...

2014-04-01

278

25 CFR 175.13 - Procedures for adjusting electric power rates to reflect changes in the cost of purchased power...  

Code of Federal Regulations, 2012 CFR

... Procedures for adjusting electric power rates to reflect changes in the cost of purchased power or energy. 175.13 Section 175...DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees,...

2012-04-01

279

40 CFR 270.175 - For what reasons may the Director choose to modify my final RAP?  

Code of Federal Regulations, 2012 CFR

...what reasons may the Director choose to modify my final RAP? 270.175 Section 270.175 Protection of Environment...HAZARDOUS WASTE PERMIT PROGRAM Remedial Action Plans (RAPs) How May My Rap Be Modified, Revoked and Reissued, Or...

2012-07-01

280

40 CFR 270.175 - For what reasons may the Director choose to modify my final RAP?  

Code of Federal Regulations, 2010 CFR

...what reasons may the Director choose to modify my final RAP? 270.175 Section 270.175 Protection of Environment...HAZARDOUS WASTE PERMIT PROGRAM Remedial Action Plans (RAPs) How May My Rap Be Modified, Revoked and Reissued, Or...

2010-07-01

281

40 CFR 270.175 - For what reasons may the Director choose to modify my final RAP?  

Code of Federal Regulations, 2013 CFR

...what reasons may the Director choose to modify my final RAP? 270.175 Section 270.175 Protection of Environment...HAZARDOUS WASTE PERMIT PROGRAM Remedial Action Plans (RAPs) How May My Rap Be Modified, Revoked and Reissued, Or...

2013-07-01

282

40 CFR 270.175 - For what reasons may the Director choose to modify my final RAP?  

Code of Federal Regulations, 2011 CFR

...what reasons may the Director choose to modify my final RAP? 270.175 Section 270.175 Protection of Environment...HAZARDOUS WASTE PERMIT PROGRAM Remedial Action Plans (RAPs) How May My Rap Be Modified, Revoked and Reissued, Or...

2011-07-01

283

25 CFR 175.13 - Procedures for adjusting electric power rates to reflect changes in the cost of purchased power...  

Code of Federal Regulations, 2010 CFR

... false Procedures for adjusting electric power rates to reflect changes in the cost of purchased power or energy. 175.13 Section 175.13...INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric...

2010-04-01

284

41 CFR 102-192.175 - What types of support does GSA offer to Federal agency mail management programs?  

Code of Federal Regulations, 2010 CFR

41 Public Contracts and Property Management 3 2010-07-01 2010-07-01...does GSA offer to Federal agency mail management programs? 102-192.175 Section...175 Public Contracts and Property Management Federal Property Management...

2010-07-01

285

49 CFR 175.8 - Exceptions for operator equipment and items of replacement.  

...products), alcoholic beverages, colognes, liquefied gas lighters, perfumes, and portable electronic devices containing lithium cells or batteries that meet the requirements of § 175.10(a)(18) carried aboard a passenger-carrying aircraft...

2014-10-01

286

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Airplanes: Reciprocating engine-powered: Weight...FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered:...

2013-01-01

287

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Airplanes: Reciprocating engine-powered: Weight...FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered:...

2012-01-01

288

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

...2014-01-01 2014-01-01 false Airplanes: Reciprocating engine-powered: Weight...FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered:...

2014-01-01

289

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Airplanes: Reciprocating engine-powered: Weight...FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered:...

2010-01-01

290

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Airplanes: Reciprocating engine-powered: Weight...FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered:...

2011-01-01

291

49 CFR 175.310 - Transportation of flammable liquid fuel; aircraft only means of transportation.  

... false Transportation of flammable liquid fuel; aircraft only means of transportation...175.310 Transportation of flammable liquid fuel; aircraft only means of transportation...transportation are impracticable, flammable liquid fuels may be carried on...

2014-10-01

292

INTELLIGENCE 23, 175-190 (1996) The Relationship Between WAIS-R  

E-print Network

INTELLIGENCE 23, 175-190 (1996) The Relationship Between WAIS-R Abilities and Speed of Processing status) 123 participants were tested on the Wechsler Adult Intelligence Scale-Revised (WAIS-R) and a test

Crawford, John R.

293

The National Library of Medicine: 175 Years of Innovation | NIH MedlinePlus the Magazine  

MedlinePLUS

... Javascript on. The National Library of Medicine 175 Years of Information Innovation Past Issues / Winter 2011 Table ... both men and women was less than 40 years! Today, thanks to the National Library of Medicine, ...

294

Computational Science Technical Note CSTN-175 Characterising Components and Flocculation Structure of Sediment in a  

E-print Network

0 Computational Science Technical Note CSTN-175 Characterising Components and Flocculation of the model for simulating flocculation in water treatment systems. Keywords: simulation; diusion, author = {K. A. Hawick}, title = {Characterising Components and Flocculation Structure of Sediment

Hawick, Ken

295

40 CFR 429.175 - Pretreatment standards for existing sources (PSES).  

Code of Federal Regulations, 2010 CFR

...GUIDELINES AND STANDARDS TIMBER PRODUCTS PROCESSING POINT SOURCE CATEGORY Wood Furniture and Fixture Production With Water Wash Spray Booth(s) or With Laundry Facilities Subcategory § 429.175 Pretreatment standards for existing sources (PSES)....

2010-07-01

296

40 CFR 408.175 - Standards of performance for new sources.  

...POINT SOURCE CATEGORY Alaskan Mechanized Salmon Processing Subcategory § 408.175...this subpart: (1) Any mechanized salmon processing facility located in population...0 to 9.0. (2) Any mechanized salmon processing facility not covered...

2014-07-01

297

40 CFR 267.175 - What special requirements must I meet for incompatible wastes?  

Code of Federal Regulations, 2011 CFR

...AGENCY (CONTINUED) SOLID WASTES (CONTINUED) STANDARDS...OWNERS AND OPERATORS OF HAZARDOUS WASTE FACILITIES OPERATING UNDER A STANDARDIZED PERMIT Use and Management of Containers § 267.175...must I meet for incompatible wastes? (a) You must not...

2011-07-01

298

40 CFR 267.175 - What special requirements must I meet for incompatible wastes?  

Code of Federal Regulations, 2012 CFR

...AGENCY (CONTINUED) SOLID WASTES (CONTINUED) STANDARDS...OWNERS AND OPERATORS OF HAZARDOUS WASTE FACILITIES OPERATING UNDER A STANDARDIZED PERMIT Use and Management of Containers § 267.175...must I meet for incompatible wastes? (a) You must not...

2012-07-01

299

40 CFR 267.175 - What special requirements must I meet for incompatible wastes?  

Code of Federal Regulations, 2013 CFR

...AGENCY (CONTINUED) SOLID WASTES (CONTINUED) STANDARDS...OWNERS AND OPERATORS OF HAZARDOUS WASTE FACILITIES OPERATING UNDER A STANDARDIZED PERMIT Use and Management of Containers § 267.175...must I meet for incompatible wastes? (a) You must not...

2013-07-01

300

40 CFR 267.175 - What special requirements must I meet for incompatible wastes?  

Code of Federal Regulations, 2010 CFR

...AGENCY (CONTINUED) SOLID WASTES (CONTINUED) STANDARDS...OWNERS AND OPERATORS OF HAZARDOUS WASTE FACILITIES OPERATING UNDER A STANDARDIZED PERMIT Use and Management of Containers § 267.175...must I meet for incompatible wastes? (a) You must not...

2010-07-01

301

7 CFR 4279.175 - Domestic lamb industry adjustment assistance program set aside.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Domestic lamb industry adjustment assistance program set aside...AGRICULTURE GUARANTEED LOANMAKING Business and Industry Loans § 4279.175 Domestic lamb industry adjustment assistance program set...

2010-01-01

302

Microsecond-pulsed ytterbium fiber laser system with a broad tuning range and a small spectral linewidth  

NASA Astrophysics Data System (ADS)

We present a tunable high power ytterbium fiber laser system which is suitable for a variety of applications in nonlinear frequency conversion, spectroscopy or in medicine technique. The realized laser system consists of a master oscillator power amplifier arrangement with a fiber integrated pulse shaper. The continuous-wave core-pumped fiber oscillator with a grating in Littman configuration as tuning element defines the spectral properties of the system, like tuning range and spectral linewidth. A fiber integrated modulator is used for pulse generation and shaping. The losses due to this modulator are compensated in a core-pumped amplifier. The final amplifier stage applying a double clad fiber generates peak powers at a multi Watt level. At a repetition rate of 20 kHz and a pulse duration of 3 ?s an average output power of 1.8 Watt has been achieved corresponding to a peak power of 88 W. The system is tunable from 1040 nm to 1070 nm with a linewidth of 10 MHz. Experimental results on tuning performance, pulse shaping and stability will be presented.

Engelbrecht, Martin; Wandt, Dieter; Kracht, Dietmar

2007-02-01

303

Intense red upconversion fluorescence emission in NIR-excited erbium-ytterbium doped laponite-derived phosphor  

NASA Astrophysics Data System (ADS)

In this report the optical properties and energy-transfer frequency upconversion luminescence of Er3+/Yb3+-codoped laponite-derived powders under 975 nm infrared excitation is investigated. The 75%(laponite):25%(PbF2) samples doped with erbium and ytterbium ions, generated high intensity red emission around 660 nm and lower intensity green emission around 525, and 545 nm. The observed emission signals were examined as a function of the excitation power and annealing temperature. The results indicate that energy-transfer, and excited-state absorption are the major upconversion excitation mechanism for the erbium excited-state red emitting level. The precursor glass samples were also heat treated at annealing temperatures of 300 °C, 400 °C, 500 °C, and 600 °C, for a 2h period. The dependence of the visible upconversion luminescence emission upon the annealing temperature indicated the existence of an optimum temperature which leads to the generation of the most intense and spectrally pure red emission signal.

da Silva, Andréa F.; Moura, Diógenes S.; Gouveia-Neto, Artur S.; Silva, Elias A., Jr.; Bueno, Luciano A.; Costa, Ernande B.; Azevedo, Eduardo N.

2011-02-01

304

Intense red upconversion fluorescence emission in NIR-excited erbium-ytterbium doped laponite-derived phosphor  

NASA Astrophysics Data System (ADS)

In this report the optical properties and energy-transfer frequency upconversion luminescence of Er 3+/Yb 3+-codoped laponite-derived powders under 975 nm infrared excitation is investigated. The 75%(laponite):25%(PbF 2) samples doped with erbium and ytterbium ions, generated high intensity red emission around 660 nm and lower intensity green emission around 525, and 545 nm. The observed emission signals were examined as a function of the excitation power and annealing temperature. The results indicate that energy-transfer, and excited-state absorption are the major upconversion excitation mechanism for the erbium excited-state red emitting level. The precursor glass samples were also heat treated at annealing temperatures of 300 °C, 400 °C, 500 °C, and 600 °C, for a 2 h period. The dependence of the visible upconversion luminescence emission upon the annealing temperature indicated the existence of an optimum temperature which leads to the generation of the most intense and spectrally pure red emission signal.

da Silva, Andréa F.; Moura, Diógenes S.; Gouveia-Neto, Artur S.; Silva, Elias A.; Bueno, Luciano A.; Costa, Ernande B.; Azevedo, Eduardo N.

2011-09-01

305

Influence of ytterbium on the electrochemical property of PbCaSn alloy in sulfuric acid solution  

NASA Astrophysics Data System (ADS)

The influence of ytterbium on the electrochemical property of PbCaSn alloy in 4.5 mol L-1 H2SO4 solution is studied by cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and Mott-Schottky plot. The results show that Yb can improve the corrosion resistance of PbCaSn alloy in 4.5 mol L-1 H2SO4 solution. Mott-Schottky plot reveals that the anodic film on PbCaSn alloy at 1.28 VSCE appears an n-type semi-conductive character, Yb can decrease the slope of M-S plot, implying the increment of the defect density within the anodic film, which is beneficial to improve the conductivity of the anodic film. According to the results obtained from EIS, it can be found that the growth of Pb(II) compounds (PbSO4·PbO, 3PbSO4·PbO and PbO) is significantly inhibited by adding Yb.

Li, D. G.; Wang, J. D.; Chen, D. R.

2012-07-01

306

Versatile ytterbium ion trap experiment for operation of scalable ion trap chips with motional heating and transition frequency measurements  

E-print Network

We present the design and operation of an ytterbium ion trap experiment with a setup offering versatile optical access and 90 electrical inter-connects that can host advanced surface and multi-layer ion trap chips mounted on chip carriers. We operate a macroscopic ion trap compatible with this chip carrier design and characterise its performance, demonstrating secular frequencies >1 MHz, and trap and cool nearly all of the stable isotopes, including 171Yb+ ions, as well as ion crystals. For this particular tap we measure the motional heating rate, , and observe a proportional to 1/omega^2 behaviour for different secular frequencies, omega. We also determine a spectral noise density S_E(1 MHz) = 3.6(9)x10^-11 V^2 m^-2 Hz^-1 at an ion electrode spacing of 310(10) mu m. We describe the experimental setup for trapping and cooling Yb+ ions and provide frequency measurements of the 2S_1/2 - 2P_1/2 and 2D_3/2 - 3D[3/2]_1/2 transitions for the stable 170Yb+, 171Yb+, 172Yb+, 174Yb+ and 176Yb+ isotopes which are more precise than previously published work.

James J. McLoughlin; Altaf H. Nizamani; James D. Siverns; Robin C. Sterling; Marcus D. Hughes; Bjoern Lekitsch; Björn Stein; Seb Weidt; Winfried K. Hensinger

2010-07-22

307

Slow and fast light via two-wave mixing in ytterbium-doped fiber at 1064 nm  

NASA Astrophysics Data System (ADS)

Experimental results on observation of slow and fast light propagation via two-wave mixing (TWM) in ytterbium doped fibers (YDF) at the wavelength 1064 nm are reported. For ?10 mW of the incident cw laser power the effective population dynamic gratings with sub-ms formation time ?g and dominating phase (refractive index) components are formed in YDF by two counter-propagating coherent waves. The TWM at the recorded not shifted phase gratings is characterized by absence of any energy exchange between two interacting counter-propagating waves if they have the same frequency. For the no-degenerated TWM (i.e. that with the frequency off-set ?? between the interacting waves) the maximal energy exchange is observed when ?? is approximately equal to ?g-1 and changes its sign with the inversion of ??. In the reported experiments an effective slow and fast light propagation with maximal fractional delay of about 0.04 for 3.5 ms pulses was observed for these two maxima located at the frequency off-set ?±200 Hz.

Pablo, Enrique Gómez; Sánchez, Marcos Plata; Stepanov, Serguei

2013-07-01

308

ICOP; financial model industrial cogeneration. [CDC CYBER170,175; FORTRAN IV  

Microsoft Academic Search

The ICOP program performs financial analysis computations in a generic fashion, with special emphasis on the analysis of industrial cogeneration applications. Both undiscounted and discounted cash flows are generated. Measures of financial feasibility include energy savings, internal rate of return, and net present value.CDC CYBER170,175; FORTRAN IV; MACE, the TRW-modified KRONOS Operating System (CDC CYBER170), NOS 1.4 (CDC CYBER175); Approximately

L. M. Green; H. F. Burnworth

2008-01-01

309

Studies of Molecular Clouds Associated with H II Regions: S175  

NASA Astrophysics Data System (ADS)

We are studying the impact of H II regions on star formation in their associated molecular clouds. In this paper, we present James Clerk Maxwell Telescope R x A molecular line observations of S175 and environs. This is the first within a sample of 10 H II regions and their surrounding molecular clouds selected for our study. We first make 7' × 7' maps in 12CO(2-1), which are used to investigate the structure of the cloud and to identify individual clumps. Single point observations were made in 13CO(2-1) and CS(5-4) at the peak of the 12CO(2-1) emission within each clump in order to measure the physical properties of the gas. Densities, temperatures, clump masses, peak velocities, and line widths were measured and calculated using these observations. We have identified two condensations (S175A and S175B) in the molecular cloud associated with this H II region. S175A is adjacent to the ionization front and is expected to be affected by the H II region, while S175B is too distant to be disturbed. We compare the structure and gas properties of these two regions to investigate how the molecular gas has been affected by the H II region. S175A has been heated by the H II region and partially compressed by the ionized gas front, but contrary to our expectation it is a quiescent region while S175B is very turbulent and dynamically active. Our investigation for the source of turbulence in S175B resulted in the detection of an outflow within this region.

Azimlu, Mohaddesseh; Fich, Michel; McCoey, Carolyn

2009-06-01

310

Programme d'tudes Niveau Numro Administration des systmes informatiques Module 1-175-7-3  

E-print Network

Programme d'�tudes Niveau Num�ro Administration des syst�mes informatiques Module 1-175-7-3 Ann-056-5-1 Arts et sciences Mineure 1-960-4-0 Bio-informatique Baccalaur�at 1-468-1-0 Chimie Baccalaur�at 1 �tudes classiques Baccalaur�at 1-166-1-0 Informatique Baccalaur�at 1-175-1-0 Informatique Majeure 1

Charette, André

311

Programme d'tudes Niveau Numro Administration des systmes informatiques Module 1-175-7-3  

E-print Network

Programme d'�tudes Niveau Num�ro Administration des syst�mes informatiques Module 1'art Mineure 1-170-4-0 #12;Informatique appliqu�e Certificat de 1er cycle 1-175-5-0 Langue et culture-200-4-0 Programmation Module 1-175-7-2 Relations ethniques Module 1-101-7-0 Sciences cognitives Mineure 1

Charette, André

312

Evaluation of the exp 175 Lu(N,2N) exp 174 Lu, exp 175 Lu(N,2N/Sup 174M/Lu, and exp 175 Lu(N,3N) exp 173 Lu Cross Sections from Threshold to 20 MeV.  

National Technical Information Service (NTIS)

An evaluation of the exp 175 Lu(n,2n) exp 174 Lu, exp 175 Lu(n,2n)/sup 174m/Lu, and exp 175 Lu(n,3n) exp 173 Lu reactions from threshold to 20 MeV is presented. Available experimental data were renormalized to a consistent set of standards and were used a...

C. Philis, P. G. Young, E. D. Arthur

1978-01-01

313

Single-frequency, single-mode, plane-polarized ytterbium-doped fiber master oscillator power amplifier source with 264 W of output power  

NASA Astrophysics Data System (ADS)

We present a single-frequency, single-mode, plane-polarized ytterbium-doped all-fiber master oscillator power amplifier source at 1060 nm generating 264 W of continuous-wave output power. The final-stage amplifier operated with a high gain of 19 dB and a high conversion efficiency of 68%. There was no evidence of rollover from stimulated Brillouin scattering even at the highest output power, and the maximum output was limited only by the available pump power.

Jeong, Y.; Nilsson, J.; Sahu, J. K.; Soh, D. B. S.; Alegria, C.; Dupriez, P.; Codemard, C. A.; Payne, D. N.; Horley, R.; Hickey, L. M. B.; Wanzcyk, L.; Chryssou, C. E.; Alvarez-Chavez, J. A.; Turner, P. W.

2005-03-01

314

Experimental investigation of radiation effect on erbium-ytterbium co-doped fiber amplifier for space optical communication in low-dose radiation environment.  

PubMed

High power erbium-ytterbium co-doped fiber amplifier (EYDFA) has been radiated to the dose of 50 krad at the dose rate of 40 rad/s. Some key parameters have been measured to investigate the radiation effect on the EYDFA for space optical communication. Considering the dose of 50 krad is big enough to the most of low-dose radiation environment, these experimental results will be a good reference for the low-dose inter-satellite optical communication designers. PMID:19724555

Ma, Jing; Li, Mi; Tan, Liying; Zhou, Yanping; Yu, Siyuan; Ran, Qiwen

2009-08-31

315

Dual core ytterbium doped fiber ring laser in Fourier domain mode locked operation for swept-source optical coherence tomography  

NASA Astrophysics Data System (ADS)

We demonstrate high efficiency and wide bandwidth gain in a Ytterbium doped fiber amplifier. The highpowered amplifier has potential applications for use with a swept-source fiber ring laser in multi-channel optical coherence tomography (OCT) system. The ring cavity design includes a 976nm pumped dual core Yb doped fiber as the gain medium, where a rotating polygon mirror is used as a wavelength-sweeping filter for this source. The amplified spontaneous emission (ASE) had a spectral bandwidth of 1037-1145nm at -60dBm, where a tunable lasing bandwidth of the ring cavity ranged from 1057-1115nm. The highest output power, for both the ASE and lasing spectrum, with this configuration was ~200mW, however it is possible to have a larger bandwidth and a larger output power. Higher power, in the wattage range is achievable if free space components are employed. Pumped with 976nm light at 1.27W, the use of this novel dual core Yb doped fiber as an amplifier has been successfully demonstrated, as it provided a small signal gain of 29.6 dB at 1085nm, where the gain medium was successfully saturated during operation. This is important for the spectral shaping requirements of OCT to improve image quality. The gain was demonstrated for several different wavelengths and for several pumping powers at a 1085nm wavelength. Fourier domain mode locked operation (FDML) was achieved with a bandwidth of 15nm and a sweep rate of 51.4kHz. This laser source offers a low-cost, high power alternative for biomedical imaging with multi-channel optical coherence tomography.

Harduar, Mark K.; Mariampillai, Adrian; Vuong, Barry; Cheng, Kyle H. Y.; Chen, Lawrence R.; Gu, Xijia; Standish, Beau A.; Yang, Victor X. D.

2010-02-01

316

?-decay spectroscopy of the chain 179Tlg?175Aug?171Irg?167Rem  

NASA Astrophysics Data System (ADS)

Detailed ?-decay studies of 179Tlg and its daughter products 175Aug and 171Irg were carried out in two complementary experiments at the mass separator ISOLDE (CERN) and velocity filter SHIP (GSI). First unambiguous determination of the ?-decay properties of 175Aug was performed as follows: E? = 6433(4) keV, T1/2 = 207(7) ms, and ?-decay branching ratio 90(7)%. First determination of the ?-decay branching ratios for 179Tlg and 171Irg was also made: b?(179Tlg) = 60(2)% and b?(171Irg) = 15(2)%. The spins of the ground states in 175Au and 171Ir are established as 1/2+.

Andreyev, A. N.; Liberati, V.; Antalic, S.; Ackermann, D.; Barzakh, A.; Bree, N.; Cocolios, T. E.; Diriken, J.; Elseviers, J.; Fedorov, D.; Fedosseev, V. N.; Fink, D.; Franchoo, S.; Heinz, S.; Heßberger, F. P.; Hofmann, S.; Huyse, M.; Ivanov, O.; Khuyagbaatar, J.; Kindler, B.; Köster, U.; Lane, J. F. W.; Lommel, B.; Mann, R.; Marsh, B.; Molkanov, P.; Nishio, K.; Page, R. D.; Patronis, N.; Pauwels, D.; Radulov, D.; Šáro, Š.; Seliverstov, M.; Sjödin, M.; Tsekhanovich, I.; Van den Bergh, P.; Van Duppen, P.; Venhart, M.; Veselský, M.

2013-05-01

317

A MULTI-WAVELENGTH INVESTIGATION OF RCW175: AN H II REGION HARBORING SPINNING DUST EMISSION  

SciTech Connect

Using infrared, radio continuum, and spectral observations, we performed a detailed investigation of the H II region RCW175. We determined that RCW175, which actually consists of two separate H II regions, G29.1-0.7 and G29.0-0.6, is located at a distance of 3.2 {+-} 0.2 kpc. Based on the observations we infer that the more compact G29.0-0.6 is less evolved than G29.1-0.7 and was possibly produced as a result of the expansion of G29.1-0.7 into the surrounding interstellar medium. We compute a star formation rate for RCW175 of (12.6 {+-} 1.9) Multiplication-Sign 10{sup -5} M{sub Sun} yr{sup -1}, and identified six possible young stellar object candidates within its vicinity. Additionally, we estimate that RCW175 contains a total dust mass of 215 {+-} 53 M{sub Sun }. RCW175 has previously been identified as a source of anomalous microwave emission (AME), an excess of emission at centimeter wavelengths often attributed to electric dipole radiation from the smallest dust grains. We find that the AME previously detected in RCW175 is not correlated with the smallest dust grains (polycyclic aromatic hydrocarbons or small carbonaceous dust grains), but rather with the exciting radiation field within the region. This is a similar result to that found in the Perseus molecular cloud, another region which harbors AME, suggesting that the radiation field may play a pivotal role in the production of this new Galactic emission mechanism. Finally, we suggest that these observations may hint at the importance of understanding the role played by the major gas ions in spinning dust models.

Tibbs, C. T.; Compiegne, M.; Carey, S. [Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Paladini, R. [NASA Herschel Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Dickinson, C.; Davies, R. D.; Davis, R. J. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester M13 9PL (United Kingdom); Alves, M. I. R. [Institut d'Astrophysique Spatiale, Universite Paris Sud XI, Batiment 121, 91405 Orsay (France); Flagey, N. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91125 (United States); Shenoy, S. [Space Science Division, NASA Ames Research Center, M/S 245-6, Moffett Field, CA 94035 (United States); Noriega-Crespo, A. [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); Casassus, S. [Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago (Chile); Molinari, S.; Elia, D.; Pestalozzi, M.; Schisano, E., E-mail: ctibbs@ipac.caltech.edu [INAF-Istituto Fisica Spazio Interplanetario, Via Fosso del Cavaliere 100, I-00133 Roma (Italy)

2012-08-01

318

Mutational Analysis of the Pseudomonas aeruginosa Myovirus ?KZ Morphogenetic Protease gp175  

PubMed Central

Pseudomonas aeruginosa myovirus ?KZ has a 270-kb genome within a T=27 icosahedral capsid that contains a large, unusual, and structurally well-defined protein cylindrical inner body (IB) spanning its interior. Proteolysis forms a pivotal stage in ?KZ head and IB morphogenesis, with the protease gp175 cleaving at least 19 of 49 different head proteins, including the major capsid protein and five major structural IB proteins. Here we show that the purified mature form of gp175 is active and cleaves purified IB structural proteins gp93 and gp89. Expression vector synthesis and purification of the zymogen/precursor yielded an active, mature-length protease, showing independent C-terminal gp175 self-cleavage autoactivation. Mutation of either the predicted catalytic serine or histidine inactivated mature gp175, supporting its classification as a serine protease and representing the first such direct biochemical demonstration with purified protease and substrate proteins for any phage protease. These mutations also blocked self-cleavage of the precursor while allowing intermolecular gp175 processing. To confirm the cleavage specificity of gp175, we mutated three cleavage sites in gp93, which blocked proteolysis at these sites. The N-terminal propeptide of gp93 was shown to undergo more extensive proteolysis than previously identified. We found that proteolysis in gp93 progressed from the N to C terminus, while blocking cleavage sites slowed but did not eliminate downstream proteolysis. These findings were shown by informatics to be relevant to the head morphogenesis of numbers of other related IB-containing giant phages as well as to T4 and herpesviruses, which have homologous proteases. PMID:23740980

Thomas, Julie A.

2013-01-01

319

Improved cycling behavior of ZEBRA battery operated at intermediate temperature of 175°C  

SciTech Connect

Operation of the sodium-nickel chloride battery at temperatures below 200°C reduces cell degradation and improves cyclability. One of the main technical issues with operating this battery at intermediate temperatures such as 175°C is the poor wettability of molten sodium on ?”-alumina solid electrolyte (BASE), which causes reduced active area and limits charging. In order to overcome the poor wettability of molten sodium on BASE at 175°C, a Pt grid was applied on the anode side of the BASE using a screen printing technique. Cells with their active area increased by metallized BASEs exhibited deeper charging and stable cycling behavior.

Li, Guosheng; Lu, Xiaochuan; Kim, Jin Yong; Lemmon, John P.; Sprenkle, Vincent L.

2014-01-01

320

NIR-to-NIR bioimaging DOI: 10.1002/anie.200((will be filled in by the editorial staff)) Ytterbium based Bioprobes for NIR-to-NIR Two Photon Scanning Laser Microscopy  

E-print Network

drawback for microscopy because of the need to cleanly separate the emission from the excitation. Nonlinear of the target complexes. In this context, lanthanide complexes and particularly NIR emitters like ytterbium of lanthanide luminescence by two-photon absorption is currently a challenging field of research but so far

Boyer, Edmond

321

Ecological Applications, 17(5), 2007, pp. 14991510 2007 by the Ecological Society of America  

E-print Network

Ecological Applications, 17(5), 2007, pp. 1499­1510 � 2007 by the Ecological Society of America easily accessible remote sensing metrics (wetness, greenness, and brightness), derived from performing cover and decreased with residential area across sites. Conversely, the number of agriculture

Ranganathan, Jai

322

175. Photocopy of photograph, U.S. Army, ca. 1943 (original print ...  

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

175. Photocopy of photograph, U.S. Army, ca. 1943 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). R.M.A. - 626 - POST ENGINEER LOOKING N.W. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

323

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.  

Code of Federal Regulations, 2012 CFR

...glycol As a solvent removed by water washing. Iron oxide Lithium hydroxide Removed by water washing. Methyl orange As...not to exceed those prescribed in § 175.300(c)(3); lithium extractives not to exceed 0.025 milligram per square...

2012-04-01

324

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.  

Code of Federal Regulations, 2011 CFR

...glycol As a solvent removed by water washing. Iron oxide Lithium hydroxide Removed by water washing. Methyl orange As...not to exceed those prescribed in § 175.300(c)(3); lithium extractives not to exceed 0.025 milligram per square...

2011-04-01

325

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.  

...glycol As a solvent removed by water washing. Iron oxide Lithium hydroxide Removed by water washing. Methyl orange As...not to exceed those prescribed in § 175.300(c)(3); lithium extractives not to exceed 0.025 milligram per square...

2014-04-01

326

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.  

Code of Federal Regulations, 2013 CFR

...glycol As a solvent removed by water washing. Iron oxide Lithium hydroxide Removed by water washing. Methyl orange As...not to exceed those prescribed in § 175.300(c)(3); lithium extractives not to exceed 0.025 milligram per square...

2013-04-01

327

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.  

Code of Federal Regulations, 2010 CFR

...glycol As a solvent removed by water washing. Iron oxide Lithium hydroxide Removed by water washing. Methyl orange As...not to exceed those prescribed in § 175.300(c)(3); lithium extractives not to exceed 0.025 milligram per square...

2010-04-01

328

Bourns College of Engineering, University of California, Riverside EE-175: Senior Design Project  

E-print Network

. Particular focus is on the design and implementation of web-based teleoperational robots using intelligent1 Bourns College of Engineering, University of California, Riverside EE-175: Senior Design Project standing in Electrical Engineering. Objectives The Senior Design Project is the culmination of course work

329

19 CFR 175.25 - Procedure at port of entry designated by petitioner.  

Code of Federal Regulations, 2010 CFR

... false Procedure at port of entry designated by petitioner...175.25 Procedure at port of entry designated by petitioner...application by him to the port director. (b) Notice...liquidation of the first of the entries to be liquidated...

2010-04-01

330

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Black Rock Canal and Lock at Buffalo, New York. ...NAVIGATION REGULATIONS § 162.175 Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

2013-07-01

331

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Black Rock Canal and Lock at Buffalo, New York. ...NAVIGATION REGULATIONS § 162.175 Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

2011-07-01

332

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Black Rock Canal and Lock at Buffalo, New York. ...NAVIGATION REGULATIONS § 162.175 Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

2010-07-01

333

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

...2014-07-01 2014-07-01 false Black Rock Canal and Lock at Buffalo, New York. ...NAVIGATION REGULATIONS § 162.175 Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

2014-07-01

334

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Black Rock Canal and Lock at Buffalo, New York. ...NAVIGATION REGULATIONS § 162.175 Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

2012-07-01

335

MILITARY MEDICINE, 175, 8;594, 2010 Limitations of the Entomological Operational Risk Assessment  

E-print Network

MILITARY MEDICINE, 175, 8;594, 2010 Limitations of the Entomological Operational Risk AssessmentD ABSTRACT The Entomological Operational Risk Assessment (EORA) is used by the U.S. military to estimate, dengue, yellow fever, plague, typhus, and leishmani- sis have affected military objectives for hundreds

Peterson, Robert K. D.

336

World Precision Instruments, Inc. International Trade Center, 175 Sarasota Center Blvd., Sarasota FL 34240-9258  

E-print Network

World Precision Instruments, Inc. USA International Trade Center, 175 Sarasota Center Blvd-mail: wpide@wpi-europe.com China & Hong Kong WPI Shanghai Trading Co., Ltd. Rm 20a, No8 Dong Fang Rd., Lu Jia- audio frequency range World Precision Instruments INSTRUCTION MANUAL Serial No

Kleinfeld, David

337

World Precision Instruments, Inc. International Trade Center, 175 Sarasota Center Blvd., Sarasota FL 34240-9258  

E-print Network

World Precision Instruments, Inc. USA International Trade Center, 175 Sarasota Center Blvd.pipetter.com A395D, A395R Linear Stimulus Isolator World Precision Instruments INSTRUCTION MANUAL Serial No._____________________ 092608 www.wpiinc.com #12;Copyright © 2008 by World Precision Instruments, Inc. All rights reserved

Kleinfeld, David

338

Gastric Invasive Micropapillary Carcinoma with Intestinal Phenotypes Harboring a TP53 R175H Mutation  

PubMed Central

We report a case of gastric invasive micropapillary carcinoma (IMPC) in an 86-year-old female patient. She was admitted to our hospital with a chief complaint of bloody emesis. Upper gastrointestinal endoscopy found a gastric adenocarcinoma at the antrum. The biopsy specimens showed moderately differentiated adenocarcinoma with invasive small tumor nests. Distal gastrectomy with systematic lymph node dissection demonstrated that the tumor had IMPC through a pathological examination. Despite the depth of tumor invasion (the submucosa), extensive lymph node metastases were observed. Anti-D2-40 immunostaining revealed numerous infiltrating tumor cell nests in the lymphatic vessels, which could explain subsequent multiple lymph node metastases. The adenocarcinoma showed intestinal phenotypes by several immunohistochemical studies. One of these antibodies (CD10) clearly demonstrated the inverted apical-basal (inside-out) pattern of IMPC, whereas it showed an ordinary pattern in intestinal metaplasia adjacent to the tumor. Furthermore, genetic analysis by direct sequencing revealed a point mutation in the exon 5 of TP53 in the tumor. The mutation presumably harbors a missense mutation from Arg to His at the codon 175 (R175H). R175H has been previously described as a ‘gain-of-function’ mutation with a high invasive or metastatic potential in several types of cancers. In summary, this is one of the first reported cases of gastric IMPC with intestinal phenotypes harboring a TP53 R175H mutation in the literature.

Ikeda, Hideyuki; Kukitsu, Takehiro; Johmen, Wataru; Nakamura, Hajime; Yamauchi, Natumi; Ishikawa, Kazuma; Saikawa, Takashi; Noda, Sayaka; Saitoh, Tadanori; Ueno, Yoshinori; Noda, Yuuya; Yamazaki, Sayuki; Kuroda, Yoshikazu; Koshiko, Susumu; Sasagawa, Yutaka

2014-01-01

339

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2011-07-01

340

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2012-07-01

341

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

... 2014-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2014-07-01

342

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2010-07-01

343

SIDA 22(1): 151 175. 2006 TAXONOMY OF THE CUSCUTA PENTAGONA COMPLEX  

E-print Network

SIDA 22(1): 151 ­ 175. 2006 TAXONOMY OF THE CUSCUTA PENTAGONA COMPLEX (CONVOLVULACEAE) IN NORTH ABSTRACT Cuscuta pentagona, C. campestris, and C. glabrior are closely similar taxa recognized here three varieties of Cuscuta pentagona Engelm. in addition to the typical form: var. calycina, var

344

SDSU General Catalog 2012-2013 175 Child and Family Development  

E-print Network

SDSU General Catalog 2012-2013 175 CFD Child and Family Development In the College of Education: Booth, Gardner Offered by the Department Master of Science degree in child development. Major in child development with the B.S. degree in applied arts and sciences. Minor in child development. Certificate

Gallo, Linda C.

345

SDSU General Catalog 2011-2012 175 Child and Family Development  

E-print Network

SDSU General Catalog 2011-2012 175 CFD Child and Family Development In the College of Education Offered by the Department Master of Science degree in child development. Major in child development with the B.S. degree in applied arts and sciences. Minor in child development. Certificate in early childhood

Gallo, Linda C.

346

Draft Genome Sequence of the Antibiotic-Producing Epiphytic Isolate Pantoea ananatis BRT175  

PubMed Central

Pantoea is a member of the Enterobacteriaceae, whose members have been shown to produce novel antibiotics. Here, we report the 4.8-Mb genome sequence of Pantoea ananatis strain BRT175, an epiphytic isolate from strawberries that produces an antibiotic that is effective against the fire blight pathogen, Erwinia amylovora. PMID:24201193

Smith, Derek D. N.; Kirzinger, Morgan W. B.

2013-01-01

347

Degradation of mutant p53H175 protein by Zn(II) through autophagy  

PubMed Central

TP53, one of the most important oncosuppressors, is frequently mutated in cancer. Several p53 mutant proteins escape proteolytic degradation and are highly expressed in an aberrant conformation often acquiring pro-oncogenic activities that promote tumor progression and resistance to therapy. Therefore, it has been vastly proposed that reactivation of wild-type (wt) function(s) from mutant p53 (mutp53) may have therapeutic significance. We have previously reported that Zn(II) restores a folded conformation from mutp53 misfolding, rescuing wild-type (wt) p53/DNA-binding and transcription activities. However, whether Zn(II) affects mutp53 stability has never been investigated. Here we show that a novel Zn(II) compound induced mutp53 (R175H) protein degradation through autophagy, the proteolytic machinery specifically devoted to clearing misfolded proteins. Accordingly, pharmacological or genetic inhibition of autophagy prevented Zn(II)-mediated mutp53H175 degradation as well as the ability of the Zn(II) compound to restore wtp53 DNA-binding and transcription activity from this mutant. By contrast, inhibition of the proteasome failed to do so, suggesting that autophagy is the main route for p53H175 degradation. Mechanistically, Zn(II) restored the wtp53 ability to induce the expression of the p53 target gene DRAM (damage-regulated autophagy modulator), a key regulator of autophagy, leading to autophagic induction. Accordingly, inhibition of wtp53 transactivation by pifithrin-? (PFT-?) impaired both autophagy and mutp53H175 degradation induced by curcumin-based zinc compound (Zn(II)-curc). Viewed together, our results uncover a novel mechanism employed by Zn(II)-curc to reactivate mutp53H175, which involves, at least in part, induction of mutp53 degradation via wtp53-mediated autophagy. PMID:24874727

Garufi, A; Pucci, D; D'Orazi, V; Cirone, M; Bossi, G; Avantaggiati, M L; D'Orazi, G

2014-01-01

348

Nuclear Instruments and Methods in Physics Research B28 (1987) 175-184 North-Holland, Amsterdam  

E-print Network

Nuclear Instruments and Methods in Physics Research B28 (1987) 175-184 North-Holland, Amsterdam 175.M. GHONIEM Mechanical, Aerospace and Nuclear Engineering Department University of California, Los Angeles for treatment of large-angle nuclear collisions. Small-angle nuclear collisions and electronic stopping

Ghoniem, Nasr M.

349

Blue-green single-frequency laser based on intracavity frequency doubling of a diode-pumped Ytterbium-doped laser.  

PubMed

Single-frequency lasers in the blue-green (500 nm) visible spectrum are important for many applications including iodine precision spectroscopy, optical frequency standards or ionized argon lasers substitution. To the best of our knowledge, we report in this paper the first single-frequency diode-pumped Ytterbium-doped solid-state laser operating at 501.7 nm by intracavity second harmonic generation (SHG). The single-frequency fundamental infrared laser light is generated by a diode-pumped Yb3+:Y2SiO5 crystal in a ring oscillator. Intracavity SHG with a KNbO3 nonlinear crystal produced more than 50 mW of single-frequency blue-green radiation. PMID:19495123

Jacquemet, Mathieu; Druon, Frédéric; Balembois, François; Georges, Patrick; Ferrand, Bernard

2005-04-01

350

A novel chemiluminescence from the reaction of singlet oxygen with ?-diketonates of europium(iii), neodymium(iii) and ytterbium(iii).  

PubMed

Decomposition of 1,4-dimethylnaphthalene endoperoxide, which is the source of singlet oxygen, in the presence of ?-diketonates of europium(iii), neodymium(iii) and ytterbium(iii) is accompanied by bright chemiluminescence (CL) in visible and near infra-red spectral region due to characteristic emission from the lanthanides at ?max = 615 and 710 nm ((5)D0?(7)F2 and (5)D0?(7)F4 transitions of Eu(3+)), 900 nm ((4)F3/2?(4)I9/2 transition of Nd(3+)) and 1000 nm ((2)F5/2?(2)F7/2 transition of Yb(3+)). Singlet oxygen is the key intermediate responsible for the observed CL, which is presumably generated by the reaction of (1)O2 with ligands of the complexes. The CL phenomenon discovered herein paves the way towards the development of lanthanide-based CL probe for (1)O2. PMID:25358493

Kazakov, Dmitri V; Safarov, Farit E

2014-12-12

351

Collision-induced photon echo at the transition 0{r_reversible}1 in ytterbium vapor: Direct proof of depolarizing collision anisotropy  

SciTech Connect

A collision-induced photon echo arising at the transition 0{r_reversible}1 of ytterbium in the presence of heavy atomic buffer is investigated. Collision-induced echo signal appears in the case of mutually orthogonal linear polarizations of exciting pulses and it is absent without buffer. Collision-induced echo power grows with buffer pressure up to the maximum value and decays exponentially at further buffer pressure growth. Collision-induced echo power is essentially less than that of the ordinary echo generated by pulses with parallel polarizations in the same mixture, and its polarization is linear with the polarization vector directed along that of the first exciting pulse. All the properties of collision-induced photon echo are explained on the basis of collision relaxation dependence on the direction of active atom velocity.

Rubtsova, N. N.; Gol'dort, V. G.; Ishchenko, V. N.; Khvorostov, E. B.; Kochubei, S. A.; Reshetov, V. A.; Yevseyev, I. V. [A. V. Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, 13 Academician Lavrentyev Avenue, Novosibirsk 630090 (Russian Federation); Togliatti State University, 14 Belorusskaya Street, Togliatti 445667 (Russian Federation); Moscow Physical Engineering State Institute, 31 Kashirskoye Shosse, Moscow 115409 (Russian Federation)

2011-09-15

352

Observation of multipulse bunches in a graphene oxide passively mode-locked ytterbium-doped fiber laser with all-normal dispersion  

NASA Astrophysics Data System (ADS)

We give a systematic experimental study of multipulse bunches in a graphene oxide saturable absorber (GOSA) passively mode-locked all-normal dispersion ytterbium-doped fiber laser (YDFL). Some special phenomena such as harmonic multipulse bunches, harmonic mode-locking, and chaotic multipulse states are also obtained. Our experiment reveals that the inserted 2.5-nm narrow bandwidth filter plays an important role in the formation of multipulse in all-normal dispersion fiber lasers. Because of the effective gain bandwidth depends on both the 2.5-nm narrow bandwidth filter and the artificial fiber birefringence filter, the multipulse operation states are sensitive to the polarization. It is the first demonstration of multipulse evolution in a GOSA passively mode-locked all-normal dispersion YDFL.

Huang, Shisheng; Wang, Yonggang; Peiguang, Yan; Zhang, Gelin; Zhao, Junqing; Li, Huiquan; Lin, Rongyong; Cao, Guangzhong; Duan, Ji'an

2014-09-01

353

Importance of E2 transitions in (sup 175)Lu(n, gamma) isomer production calculations.  

National Technical Information Service (NTIS)

The (sup 175)Lu(n,(gamma))(sup 176m,g)Lu reaction produces (sup 176)Lu both in the ground state(g.s.)(7(sup (minus)), t(sub 1/2) = 3.6 (times) 10(sup 10) y) and in an isomeric state at 0.123 MeV(1(sup (minus)), t(sub 1/2)=3.7 h). In the calculation of the...

M. A. Gardner, D. G. Gardner

1990-01-01

354

Cleans for Al vias in a 0.175 ?m dual damascene process  

Microsoft Academic Search

The effect of cleaning processes on via resistance and via continuity has been studied for 0.175 ?m Al dual damascene structures used for 1 Gbit DRAMs. Three types of vias have been investigated; high aspect ratio (4:1) Al vias landing on either W or Al damascene interconnects, and relatively low aspect ratio (1.3:1) Al vias landing on Al damascene interconnects.

J. Gambino; L. Clevenger; G. Costrini; F. Schnabel; R. Ravikumar; D. Dobuzinsky; R. Iggulden; C. Dziobkowski; H. Wildman; J. Benedict; J. Bruley; A. Domenicucci

1999-01-01

355

Low Ultraviolet B and Increased Risk of Brain Cancer: An Ecological Study of 175 Countries  

Microsoft Academic Search

Background: The purpose of this study was to determine whether an inverse association exists between latitude, solar ultraviolet B (UVB) irradiance, modeled 25-hydroxyvitamin D [25(OH)D] levels and incidence rates of cancer of the brain. Methods: Associations of latitude and UVB irradiance with age-standardized incidence rates of cancer of the brain were analyzed for 175 countries while controlling for proportion of

Sharif B. Mohr; Edward D. Gorham; Cedric F. Garland; William B. Grant; Frank C. Garland

2010-01-01

356

Dielectric anti-reflection coating application in a 0.175 ?m dual-damascene process  

Microsoft Academic Search

Various dielectric anti-reflection coatings (DARCs) were evaluated using 0.175 ?m dual-damascene structures to examine the lithography process window and integration capability. Double-DARC layers have been developed with the optimum refractive indices and thickness, based on reflectance simulations and measurements, to provide better critical dimension (CD) control as compared to organic ARC and single-DARC layer applications. The integration scheme using a

G. Y. Lee; Z. G. Lu; D. M. Dobuzinsky; X. J. Ning; G. Costrini

1998-01-01

357

A Search for Herbig-Haro Objects in NGC 7023 and Barnard 175  

NASA Astrophysics Data System (ADS)

Wide-field optical imaging was obtained of the cluster and reflection nebula NGC 7023 and the Bok globule B175. We report the discovery of four new Herbig-Haro (HH) objects in NGC 7023, the first HH objects to be found in this region. They were first detected by their H? and [S II] emission but are also visible at 3.6 and 4.5 ?m in archival Spitzer observations of this field. These HH objects are part of at least two distinct outflows. Both outflows are aligned with embedded "Class I" young stellar objects in a tight group on the western edge of the nebula. One of the outflows may have a projected distance of 0.75 pc, which is a notable length for an embedded source. No new HH objects were discovered in B175. However, we reclassify the knot HH450X, in B175, as a background galaxy. The discovery that HH 450X is not a shock front weakens the argument that HH 450 and SNR G110.3+11.3 are co-located and interacting.

Rector, T. A.; Schweiker, H.

2013-02-01

358

A Search for Herbig-Haro Objects in NGC 7023 and Barnard 175  

E-print Network

Wide-field optical imaging was obtained of the cluster and reflection nebula NGC 7023 and the Bok globule B175. We report the discovery of four new Herbig-Haro (HH) objects in NGC 7023, the first HH objects to be found in this region. They were first detected by their H-alpha and [S II] emission but are also visible at 3.6 and 4.5micron in archival Spitzer observations of this field. These HH objects are part of at least two distinct outflows. Both outflows are aligned with embedded "Class I" YSOs in a tight group on the western edge of the nebula. One of the outflows may have a projected distance of 0.75pc, which is a notable length for an embedded source. No new HH objects were discovered in B175. However, we reclassify the knot HH450X, in B175, as a background galaxy. The discovery that HH 450X is not a shock front weakens the argument that HH 450 and SNR G110.3+11.3 are co-located and interacting.

Rector, Travis A

2012-01-01

359

A SEARCH FOR HERBIG-HARO OBJECTS IN NGC 7023 AND BARNARD 175  

SciTech Connect

Wide-field optical imaging was obtained of the cluster and reflection nebula NGC 7023 and the Bok globule B175. We report the discovery of four new Herbig-Haro (HH) objects in NGC 7023, the first HH objects to be found in this region. They were first detected by their H{alpha} and [S II] emission but are also visible at 3.6 and 4.5 {mu}m in archival Spitzer observations of this field. These HH objects are part of at least two distinct outflows. Both outflows are aligned with embedded 'Class I' young stellar objects in a tight group on the western edge of the nebula. One of the outflows may have a projected distance of 0.75 pc, which is a notable length for an embedded source. No new HH objects were discovered in B175. However, we reclassify the knot HH450X, in B175, as a background galaxy. The discovery that HH 450X is not a shock front weakens the argument that HH 450 and SNR G110.3+11.3 are co-located and interacting.

Rector, T. A. [Department of Physics and Astronomy, University of Alaska Anchorage, Anchorage, AK 99508 (United States); Schweiker, H., E-mail: rector@uaa.alaska.edu, E-mail: heidis@noao.edu [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States)

2013-02-01

360

49 CFR 175.706 - Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.  

...packages containing Class 7 (radioactive) materials. 175.706 Section...packages containing Class 7 (radioactive) materials. No person may...aircraft any package of Class 7 (radioactive) materials required by §...

2014-10-01

361

49 CFR 175.702 - Separation distance requirements for packages containing Class 7 (radioactive) materials in cargo...  

...requirements for packages containing Class 7 (radioactive) materials in cargo aircraft. 175...requirements for packages containing Class 7 (radioactive) materials in cargo aircraft. ...403 of this subchapter to be labeled Radioactive Yellow-II or Radioactive...

2014-10-01

362

41 CFR 102-33.175 - What standards must we establish or require (contractually, where applicable) to train our flight...  

Code of Federal Regulations, 2010 CFR

...Regulations System (Continued) FEDERAL MANAGEMENT REGULATION PERSONAL PROPERTY 33-MANAGEMENT OF GOVERNMENT AIRCRAFT Managing Government Aircraft and Aircraft Parts Training § 102-33.175 What standards must we establish or require...

2010-07-01

363

Calponin h1-S175T point mutation enhances resistance to actin cytoskeleton perturbation in human cancer cells.  

PubMed

To investigate Calponin h1 (CNh1) regions responsible for suppressing cancer cell motility, the interaction between CNh1 and actin in HeLa cells was examined. First, it was observed that the actin binding of CNh1 depends on the calponin repeat 1 (CNR 1), region more than the actin binding site region. Next, point mutantions were generated at S175 and/or T184 in CNR1, substrates of protein kinase C, and it was observed by cellular immunostaining that the actin binding of CNh1 depends on 175th amino acid. Furthermore, the point mutation S175T exhibited more resistance to actin rearrangement by cytochalasin D and PDBu than intact CNh1, suppressing cell motility induced by PDBu. This result indicates that S175T may be an effective target for new cancer treatments. PMID:20530411

Sugaya, Akemi; Takeoka, Michiko; Itano, Naoki; Taguchi, Ayako; Ehara, Takashi; Taniguchi, Shun'ichiro

2010-04-01

364

40 CFR 723.175 - Chemical substances used in or for the manufacture or processing of instant photographic and peel...  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Chemical substances used in or for the manufacture or processing...PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT PREMANUFACTURE NOTIFICATION...Exemptions § 723.175 Chemical substances used in or for the manufacture or...

2011-07-01

365

40 CFR 723.175 - Chemical substances used in or for the manufacture or processing of instant photographic and peel...  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Chemical substances used in or for the manufacture or processing...PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT PREMANUFACTURE NOTIFICATION...Exemptions § 723.175 Chemical substances used in or for the manufacture or...

2010-07-01

366

40 CFR 723.175 - Chemical substances used in or for the manufacture or processing of instant photographic and peel...  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false Chemical substances used in or for the manufacture or processing...PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT PREMANUFACTURE NOTIFICATION...Exemptions § 723.175 Chemical substances used in or for the manufacture or...

2012-07-01

367

40 CFR 723.175 - Chemical substances used in or for the manufacture or processing of instant photographic and peel...  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Chemical substances used in or for the manufacture or processing...PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT PREMANUFACTURE NOTIFICATION...Exemptions § 723.175 Chemical substances used in or for the manufacture or...

2013-07-01

368

41 CFR 102-73.175 - What types of special purpose space may the Department of Commerce lease?  

Code of Federal Regulations, 2011 CFR

... false What types of special purpose space may the Department of Commerce lease... Acquisition by Lease Special Purpose Space Delegations § 102-73.175 What types of special purpose space may the Department of Commerce...

2011-01-01

369

41 CFR 102-73.175 - What types of special purpose space may the Department of Commerce lease?  

Code of Federal Regulations, 2010 CFR

... false What types of special purpose space may the Department of Commerce lease... Acquisition by Lease Special Purpose Space Delegations § 102-73.175 What types of special purpose space may the Department of Commerce...

2010-07-01

370

41 CFR 102-73.175 - What types of special purpose space may the Department of Commerce lease?  

Code of Federal Regulations, 2012 CFR

... false What types of special purpose space may the Department of Commerce lease... Acquisition by Lease Special Purpose Space Delegations § 102-73.175 What types of special purpose space may the Department of Commerce...

2012-01-01

371

41 CFR 102-73.175 - What types of special purpose space may the Department of Commerce lease?  

Code of Federal Regulations, 2013 CFR

... false What types of special purpose space may the Department of Commerce lease... Acquisition by Lease Special Purpose Space Delegations § 102-73.175 What types of special purpose space may the Department of Commerce...

2013-07-01

372

20 CFR 411.175 - What if a continuing disability review is begun before my ticket is in use?  

... Section 411.175 Employees' Benefits SOCIAL SECURITY ADMINISTRATION THE TICKET TO WORK AND SELF-SUFFICIENCY PROGRAM Suspension...VR agency acting as an EN under the Ticket to Work program, or you may still receive...

2014-04-01

373

20 CFR 411.175 - What if a continuing disability review is begun before my ticket is in use?  

Code of Federal Regulations, 2013 CFR

... Section 411.175 Employees' Benefits SOCIAL SECURITY ADMINISTRATION THE TICKET TO WORK AND SELF-SUFFICIENCY PROGRAM Suspension...VR agency acting as an EN under the Ticket to Work program, or you may still receive...

2013-04-01

374

20 CFR 411.175 - What if a continuing disability review is begun before my ticket is in use?  

Code of Federal Regulations, 2012 CFR

... Section 411.175 Employees' Benefits SOCIAL SECURITY ADMINISTRATION THE TICKET TO WORK AND SELF-SUFFICIENCY PROGRAM Suspension...VR agency acting as an EN under the Ticket to Work program, or you may still receive...

2012-04-01

375

UltraFlex-175 Solar Array Technology Maturation Achievements for NASA's New Millennium Program (NMP) Space Technology 8 (ST8)  

Microsoft Academic Search

ATK space systems (ATK) in collaboration with the NASA Glenn Research Center (GRC), the Jet Propulsion Laboratory (JPL), and EMCORE Photovoltaics (EPV), is executing NASA's New Millennium Program (NMP) Space Technology 8 (ST8) Project Formulation Refinement Phase to develop and validate through spaceflight a state-of-the-art solar array system called UltraFlex-175. UltraFlex-175 is a highly evolved and scaled version of the

B. Spence; S. White; A. Jones; J. Wachholz; N. Wilder; P. Cronin; T. Gregory; P. Barker; T. Allmandinger; N. Mardesich; M. Piszczor; P. Sharps; N. Fatemi

2006-01-01

376

High-pressure synthesis, crystal structure, and structural relationship of the first ytterbium fluoride borate Yb{sub 5}(BO{sub 3}){sub 2}F{sub 9}  

SciTech Connect

Yb{sub 5}(BO{sub 3}){sub 2}F{sub 9} was synthesized under high-pressure/high-temperature conditions in a Walker-type multianvil apparatus at 7.5 GPa and 1100 deg. C, representing the first known ytterbium fluoride borate. The compound exhibits isolated BO{sub 3}-groups next to ytterbium cations and fluoride anions, showing a structure closely related to the other known rare-earth fluoride borates RE{sub 3}(BO{sub 3}){sub 2}F{sub 3} (RE=Sm, Eu, Gd) and Gd{sub 2}(BO{sub 3})F{sub 3}. Monoclinic Yb{sub 5}(BO{sub 3}){sub 2}F{sub 9} crystallizes in space group C2/c with the lattice parameters a=2028.2(4) pm, b=602.5(2) pm, c=820.4(2) pm, and beta=100.63(3){sup o} (Z=4). Three different ytterbium cations can be identified in the crystal structure, each coordinated by nine fluoride and oxygen anions. None of the five crystallographically independent fluoride ions is coordinated by boron atoms, solely by trigonally-planar arranged ytterbium cations. In close proximity to the above mentioned compounds RE{sub 3}(BO{sub 3}){sub 2}F{sub 3} (RE=Sm, Eu, Gd) and Gd{sub 2}(BO{sub 3})F{sub 3}, Yb{sub 5}(BO{sub 3}){sub 2}F{sub 9} can be described via alternating layers with the formal compositions 'YbBO{sub 3}' and 'YbF{sub 3}' in the bc-plane. - Graphical abstract: High-pressure/high-temperature synthesis (multianvil technique) led to the first ytterbium fluoride borate Yb{sub 5}(BO{sub 3}){sub 2}F{sub 9}, built up from isolated BO{sub 3}-groups. The compound shows structural relations to the known rare-earth fluoride borates RE{sub 3}(BO{sub 3}){sub 2}F{sub 3} (RE=Sm, Eu, Gd) and Gd{sub 2}(BO{sub 3})F{sub 3}.

Haberer, Almut [Institut fuer Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52a, A-6020 Innsbruck (Austria); Huppertz, Hubert, E-mail: hubert.huppertz@uibk.ac.a [Institut fuer Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52a, A-6020 Innsbruck (Austria)

2009-04-15

377

High throughput RNAi screening identifies ID1 as a synthetic sick/lethal gene interacting with the common TP53 mutation R175H  

PubMed Central

The TP53 mutation (R175H) is one of the most common mutations in human cancer. It is a highly attractive strategy for cancer therapy to find the genes that lead the R175H-expressing cancer cells. The aim of this study was to identify the synthetic sick/lethal gene interacting with R175H. Using lentiviral bar-coded comprehensive shRNA library and a tetracycline-inducible R175H expressed in the SF126 human glioblastoma cell line (SF126-tet-R175H), we conducted high-throughput screening to identify the candidate genes that induce synthetic sickness/lethality in R175H-expressing cells. We identified 906 candidate gene suppressions that may lead to accelerated cell growth inhibition in the presence of R175H. Inhibitor of differentiation 1 (ID1) was one of the candidate genes, and its suppression by siRNA resulted in the acceleration of growth inhibition in cell lines both transiently and endogenously expressing R175H but not in TP53-null cell lines or other common p53 mutants (such as R273H). Flow cytometry analysis showed that ID1 suppression resulted in G1 arrest, and the arrest was accelerated by the expression of R175H. ID1 is a synthetic sick/lethal gene that interacts with R175H and is considered to be a novel molecular target for cancer therapy in R175H-expressing cells. PMID:24378760

IMAI, HIROO; KATO, SHUNSUKE; SAKAMOTO, YASUHIRO; KAKUDO, YUICHI; SHIMODAIRA, HIDEKI; ISHIOKA, CHIKASHI

2014-01-01

378

Investigation of drum pressurization incident in the 331 Building, Room 175 on January 10, 1995  

SciTech Connect

On January 10, 1995, a pressurized drum incident occurred at the 331 Building, Room 175. On January 12, 1995, the Manager of the Life Sciences Center appointed members to an Investigation Board to investigate the incident (see Exhibit A). This incident was initially categorized as an Off-Normal Occurrence, but was later elevated to an Unusual Occurrence by the Occurrence Classifier. The scope of this investigation was to employ a formal method of root cause analysis, identify the methodology, and report the results of the analysis, fully explaining the technical elements of the causal sequence along with a description of the barriers that should have or could have prevented the occurrence. During the course of the investigation, the scene of the event was not accessible. Therefore, the investigation relied primarily on testimony from staff members directly involved and their management. In addition, other outside professionals were also consulted. The Investigation Board visited the previous location of the drum, 331A Building, Room 9; Room 173, which fronts room 175, was also visited. The Investigation Board reviewed selected documents, which are also listed.

Pollari, R.A.

1995-02-01

379

Critical Glycosylated Residues in Exon Three of Erythrocyte Glycophorin A Engage Plasmodium falciparum EBA-175 and Define Receptor Specificity  

PubMed Central

ABSTRACT Erythrocyte invasion is an essential step in the pathogenesis of malaria. The erythrocyte binding-like (EBL) family of Plasmodium falciparum proteins recognizes glycophorins (Gp) on erythrocytes and plays a critical role in attachment during invasion. However, the molecular basis for specific receptor recognition by each parasite ligand has remained elusive, as is the case with the ligand/receptor pair P. falciparum EBA-175 (PfEBA-175)/GpA. This is due largely to difficulties in producing properly glycosylated and functional receptors. Here, we developed an expression system to produce recombinant glycosylated and functional GpA, as well as mutations and truncations. We identified the essential binding region and determinants for PfEBA-175 engagement, demonstrated that these determinants are required for the inhibition of parasite growth, and identified the glycans important in mediating the PfEBA-175–GpA interaction. The results suggest that PfEBA-175 engages multiple glycans of GpA encoded by exon 3 and that the presentation of glycans is likely required for high-avidity binding. The absence of exon 3 in GpB and GpE due to a splice site mutation confers specific recognition of GpA by PfEBA-175. We speculate that GpB and GpE may have arisen due to selective pressure to lose the PfEBA-175 binding site in GpA. The expression system described here has wider application for examining other EBL members important in parasite invasion, as well as additional pathogens that recognize glycophorins. The ability to define critical binding determinants in receptor-ligand interactions, as well as a system to genetically manipulate glycosylated receptors, opens new avenues for the design of interventions that disrupt parasite invasion. PMID:25205096

Salinas, Nichole D.; Paing, May M.

2014-01-01

380

Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction.  

PubMed

By coupling few-layer Molybdenum Disulfide (MoS2) with fiber-taper evanescent light field, a new type of MoS2 based nonlinear optical modulating element had been successfully fabricated as a two-dimensional layered saturable absorber with strong light-matter interaction. This MoS2-taper-fiber device is not only capable of passively mode-locking an all-normal-dispersion ytterbium-doped fiber laser and enduring high power laser excitation (up to 1 W), but also functions as a polarization sensitive optical modulating component (that is, different polarized light can induce different nonlinear optical response). Thanks to the combined advantages from the strong nonlinear optical response in MoS2 together with the sufficiently-long-range interaction between light and MoS2, this device allows for the generation of high power stable dissipative solitons at 1042.6 nm with pulse duration of 656 ps and a repetition rate of 6.74 MHz at a pump power of 210 mW. Our work may also constitute the first example of MoS2-enabled wave-guiding photonic device, and potential y give some new insights into two-dimensional layered materials related photonics. PMID:25213108

Du, Juan; Wang, Qingkai; Jiang, Guobao; Xu, Changwen; Zhao, Chujun; Xiang, Yuanjiang; Chen, Yu; Wen, Shuangchun; Zhang, Han

2014-01-01

381

Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction  

PubMed Central

By coupling few-layer Molybdenum Disulfide (MoS2) with fiber-taper evanescent light field, a new type of MoS2 based nonlinear optical modulating element had been successfully fabricated as a two-dimensional layered saturable absorber with strong light-matter interaction. This MoS2-taper-fiber device is not only capable of passively mode-locking an all-normal-dispersion ytterbium-doped fiber laser and enduring high power laser excitation (up to 1?W), but also functions as a polarization sensitive optical modulating component (that is, different polarized light can induce different nonlinear optical response). Thanks to the combined advantages from the strong nonlinear optical response in MoS2 together with the sufficiently-long-range interaction between light and MoS2, this device allows for the generation of high power stable dissipative solitons at 1042.6?nm with pulse duration of 656?ps and a repetition rate of 6.74?MHz at a pump power of 210?mW. Our work may also constitute the first example of MoS2-enabled wave-guiding photonic device, and potentially give some new insights into two-dimensional layered materials related photonics. PMID:25213108

Du, Juan; Wang, Qingkai; Jiang, Guobao; Xu, Changwen; Zhao, Chujun; Xiang, Yuanjiang; Chen, Yu; Wen, Shuangchun; Zhang, Han

2014-01-01

382

Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction  

NASA Astrophysics Data System (ADS)

By coupling few-layer Molybdenum Disulfide (MoS2) with fiber-taper evanescent light field, a new type of MoS2 based nonlinear optical modulating element had been successfully fabricated as a two-dimensional layered saturable absorber with strong light-matter interaction. This MoS2-taper-fiber device is not only capable of passively mode-locking an all-normal-dispersion ytterbium-doped fiber laser and enduring high power laser excitation (up to 1 W), but also functions as a polarization sensitive optical modulating component (that is, different polarized light can induce different nonlinear optical response). Thanks to the combined advantages from the strong nonlinear optical response in MoS2 together with the sufficiently-long-range interaction between light and MoS2, this device allows for the generation of high power stable dissipative solitons at 1042.6 nm with pulse duration of 656 ps and a repetition rate of 6.74 MHz at a pump power of 210 mW. Our work may also constitute the first example of MoS2-enabled wave-guiding photonic device, and potentially give some new insights into two-dimensional layered materials related photonics.

Du, Juan; Wang, Qingkai; Jiang, Guobao; Xu, Changwen; Zhao, Chujun; Xiang, Yuanjiang; Chen, Yu; Wen, Shuangchun; Zhang, Han

2014-09-01

383

Trepanning drilling of stainless steel using a high-power Ytterbium-doped fiber ultrafast laser: influence of pulse duration on hole geometry and processing quality  

NASA Astrophysics Data System (ADS)

Percussion drilling is a well-established technique for several applicative markets such as for aircraft and watch industries. Lamp pumped solid state lasers and more recently fiber lasers, operating in millisecond or nanosecond regimes, are classically used for these applications. However, due to their long pulse duration, these technologies are not suitable for emerging applicative market such as fuel injectors for automotive industry. Only the ultrashort laser technology, combined with special drilling optics like trepanning head, has the potential to fulfill the needs for this new market in terms of processing quality, custom-shape capabilities and short drilling time. Although numerous papers dealing with percussion drilling have been reported in the literature, only few papers are dedicated to trepanning drilling. In this context, we present some results on the influence of pulse duration on gas-assisted laser drilling of stainless steel using a trepanning head and a high power Ytterbium doped fiber ultrafast laser (20W). The influence of pulse energy (7- 64?J), fluence (3-25 J/cm2), drilling time (1-20s), processing gas pressure and drilling strategy will be discussed as well.

Lopez, John; Dijoux, Mathieu; Devillard, Raphael; Faucon, Marc; Kling, Rainer

2014-03-01

384

CW 1.06-?m pumped ytterbium-holmium co-doped all-fiber laser for 2.05 ?m  

NASA Astrophysics Data System (ADS)

An Ytterbium-Holmium co-doped all-fiber CW laser is reported. The fiber used in the laser setup has been fabricated through the conventional MCVD process in conjunction with the SD technique and finally drawn using a standard fiberdraw tower. The laser was built in a linear Fabry-Perot configuration in which two fiber Bragg gratings reflecting at 2.05 ?m were used as the cavity couplers. Under 1.06-?m in-core pumping of the fiber, CW lasing at 2.05 ?m was provided due to energy transfer Yb3+?Ho3+. The laser demonstrated low threshold (~0.8 W), moderate slope efficiency of lasing (~8.4% when measured vs. pump power launched into the active fiber), and high stability: during 6 hours its output power fluctuated within a 3% range. The laser spectrum width at a 3-dB level using an optical spectrum analyzer with a 37-pm resolution was measured to be ~70 pm.

Kir'yanov, Alexander V.; Barmenkov, Yuri O.; Minkovich, Vladimir P.

2014-08-01

385

First observation of excited states in {sup 175}Hg{sub 95}  

SciTech Connect

Excited states of the neutron-deficient nucleus {sup 175}Hg, populated using fusion-evaporation reactions, are reported for the first time. The spin and parity of the ground state has been determined to be I{sup {pi}}=7/2{sup -} through measurements of the {alpha} decay to the daughter nucleus {sup 171}Pt. A structure based on an isomeric state [T{sub 1/2}=0.34(3) {mu}s] with I{sup {pi}}=13/2{sup +} and its decay path to the ground state have been established. The observed structures are interpreted in terms of single-particle configurations, and the trends of coexisting shapes in neighboring nuclei are discussed.

O'Donnell, D.; Simpson, J.; Labiche, M. [STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD (United Kingdom); Scholey, C.; Greenlees, P. T.; Jakobsson, U.; Jones, P.; Julin, R.; Juutinen, S.; Ketelhut, S.; Leino, M.; Nyman, M.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Saren, J.; Uusitalo, J. [Department of Physics, University of Jyvaeskylae, P. O. Box 35, FI-40014, Jyvaeskylae (Finland); Baeck, T. [Department of Physics, Royal Institute of Technology, Stockholm SE-10691 (Sweden); Joss, D. T.; Judson, D. S. [Oliver Lodge Laboratory, University of Liverpool, Liverpool, L69 7ZE (United Kingdom)] (and others)

2009-05-15

386

Progressive Myoclonus Epilepsy EPM1 Locus Maps to a 175-kb Interval in Distal 21q  

PubMed Central

The EPM1 locus responsible for progressive myoclonus epilepsy of Unverricht-Lundborg type (MIM 254800) maps to a region in distal chromosome 21q where positional cloning has been hampered by the lack of physical and genetic mapping resolution. We here report the use of a recently constituted contig of cosmid, BAC, and P1 clones that allowed new polymorphic markers to be positioned. These were typed in 53 unrelated disease families from an isolated Finnish population in which a putative single ancestral EPM1 mutation has segregated for an estimated 100 generations. By thus exploiting historical recombinations in haplotype analysis, EPM1 could be assigned to the ~175-kb interval between the markers D21S2040 and D21S1259. PMID:8651302

Virtaneva, Kimmo; Miao, Jinmin; Träskelin, Ann-Liz; Stone, Nancy; Warrington, Janet A.; Weissenbach, Jean; Myers, Richard M.; Cox, David R.; Sistonen, Pertti; de la Chapelle, Albert; Lehesjoki, Anna-Elina

1996-01-01

387

[The 175th anniversary of the District Military Clinical Hospital of the Leningrad Military District].  

PubMed

For 175 years a hospital made a great contribution to the development of national health care, gaining a wealth experience in high quality health care for the soldiers. Especially the biggest merit was made by the hospital during the Great Patriotic War of 1941-1945, when 82% of the wounded soldiers ware returned for further service. The hospital was glorified by famous medical scientists of XIX-XX-centuries, such as: V. Bekhterev, R. Wreden, N. Sklifosovsky, P. Kupriyanov, N. Petrov and others. Currently, the hospital takes a worthy place among the best military medical agencies of Russian Armed Forces. The hospital is equipped with modern medical equipment. There work highly qualified personnel: 17 distinguished doctors of the Russian Federation, 2 doctors and 27 candidates of medical sciences. In practice the hospital successfully uses achievements of the leading Russian military medical facilities. The staff treat with care historical traditions of the hospital. PMID:21254531

Liutov, V V

2010-09-01

388

Progressive myoclonus epilepsy EPM1 locus maps to a 175-kb interval in distal 21q  

SciTech Connect

The EPM1 locus responsible for progressive myoclonus epilepsy of Unverricht-Lundborg type (MIM 254800) maps to a region in distal chromosome 21q where positional cloning has been hampered by the lack of physical and genetic mapping resolution. We here report the use of a recently constituted contig of cosmid, BAC, and P1 clones that allowed new polymorphic markers to be positioned. These were typed in 53 unrelated disease families from an isolated Finnish population in which a putative single ancestral EPM1 mutation has segregated for an estimated 100 generations. By thus exploiting historical recombinations in haplotype analysis, EPM1 could be assigned to the {approximately}175-kb interval between the markers D21S2040 and D21S1259. 26 refs., 2 figs., 4 tabs.

Virtaneva, K.; Miao, J.; Traeskelin, A.L.; Chapelle, A. de la; Lehesjoki, A.E. [Univ. of Helsinki (Finland)] [and others

1996-06-01

389

Coordinate phosphorylation of insulin-receptor kinase and its 175,000-Mr endogenous substrate in rat hepatocytes  

SciTech Connect

To investigate the early events in insulin signal transmission in liver, isolated rat hepatocytes were labeled with {sup 32}P, and proteins phosphorylated in response to insulin were detected by immunoprecipitation with anti-phosphotyrosine and anti-receptor antibodies and analyzed by sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis and autoradiography. In these cells, insulin rapidly stimulated tyrosine phosphorylation of the 95,000-Mr beta-subunit of the insulin receptor and a 175,000-Mr phosphoprotein (pp175). Both proteins were precipitated by anti-phosphotyrosine antibody, whereas only the insulin receptor was recognized with anti-insulin-receptor antibody. In the insulin-stimulated state, both pp175 and the receptor beta-subunit were found to be phosphorylated on tyrosine and serine residues. Based on precipitation by the two antibodies, receptor phosphorylation was biphasic with an initial increase in tyrosine phosphorylation followed by a more gradual increase in serine phosphorylation over the first 30 min of stimulation. The time course of phosphorylation of pp175 was rapid and paralleled that of the beta-subunit of the insulin receptor. The pp175 was clearly distinguished from the insulin receptor, because it was detected only when boiling SDS was used to extract cellular phosphoproteins, whereas the insulin receptor was extracted with either Triton X-100 or SDS. In addition, the tryptic peptide maps of the two proteins were distinct. The dose-response curve for insulin stimulation was shifted slightly to the left of the insulin receptor, suggesting some signal amplification at this step. These data suggest that pp175 is a major endogenous substrate of the insulin receptor in liver and may be a cytoskeletal-associated protein.

Okamoto, M.; Karasik, A.; White, M.F.; Kahn, C.R. (Joslin Diabetes Center, Boston, MA (USA))

1991-01-01

390

(175)Yb-TTHMP as a good candidate for bone pain palliation and substitute of other radiopharmaceuticals.  

PubMed

Bone metastasis is one of the most frequent causes of pain in cancer patients. Different radioisotopes such as P-32, Sm-153, Ho-166, Lu-177, and Re-186 with several chemical ligands as ethylenediaminetetramethylene phosphonic acid (EDTMP), 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetramethylene phosphonic acid (DOTMP), and propylenediaminetetramethylene phosphonate (PDTMP) are recommended for bone pain palliation. In this work, (175)Yb-triethylenetetraminehexamethylene phosphonic acid (TTHMP) was produced as a proper alternative to other radiopharmaceuticals. Relatively long half-life (T1/2 = 4.18 days), maximum energy beta particle E? =470 keV (86.5%), low abundance gamma emission 396 keV (6.4%), 286 keV (3.01%), 113.8 keV (1.88%) and low cost are considered advantageous of Yb-175 are to wider usage of this isotope; in addition, TTHMP is an ideal carrier moiety for bone metastases. Production, quality control, and biodistribution studies of (175)Yb-TTHMP were targeted. Yb-175 chloride was obtained by thermal neutron bombardment of a natural Yb2O3 sample at Tehran Research Reactor (TRR), radiolabeling was completed in 1 h by the addition of TTHMP at the room temperature and pH was 7.5-8, radiochemical purity was higher than 95%. Biodistribution studies in normal rats were carried out. The results showed favorable biodistribution features of (175)Yb-TTHMP, indicating significant accumulation in bone tissues compared with clinically used bone-seeking radiopharmaceuticals. This research presents (175)Yb-TTHMP can be a good candidate for bone pain palliation and substitute of other radiopharmaceuticals, however, further biological studies in other mammals are still needed. PMID:25210277

Safarzadeh, Laleh

2014-07-01

391

Solid-state structures of base-free ytterbocenes and inclusion compounds of bis(pentamethylcyclopentadienyl)ytterbium with neutral carboranes and toluene: The role of intermolecular contacts  

SciTech Connect

The base-free ytterbocenes (Me{sub 5}C{sub 5}){sub 2}Yb, (Me{sub 4}C{sub 5}H){sub 2}Yb, and [1,3-(Me{sub 3}C){sub 2}C{sub 5}H{sub 3}]{sub 2}Yb have been prepared from their diethyl ether adducts, synthesized by reaction of YbI{sub 2} and the sodium salt of the substituted cyclopentadiene anion in diethyl ether. The structures of the base-free molecules have been determined by X-ray crystallography. The molecule (Me{sub 5}C{sub 5}){sub 2}Yb has been found to crystallize in two different morphologies; the complex also forms inclusion complexes with toluene, ortho-carborane, meta-carborane, and 1,2-dimethyl-ortho-carborane. The ytterbocene molecule in all of the derivatives examined is bent in the solid state with centroid-metal-centroid angles ranging from 132{degree} to 147{degree}. A detailed examination of the structures and comparison with the reported structures of (Me{sub 5}C{sub 5}){sub 2}Eu, (Me{sub 5}C{sub 5}){sub 2}Sm, [1,3-(Me{sub 3}Si){sub 2}C{sub 5}H{sub 3}]{sub 2}Yb, and [1,3-(Me{sub 3}Si){sub 2}C{sub 5}H{sub 3}]{sub 2}Eu reveal that bending is the general structural preference. Close inter- or intramolecular contacts are observed in every case between the ytterbium atom and one or more carbon atoms other than those of the two cyclopentadienide rings of that ytterbocene fragment. The packing geometry is dictated by the substituents on the cyclopentadienide rings, the molecules arranging so as to minimize crowding in the solid state. The net result is a coordination polymer, dimer, or monomer, depending on the ring substituents.

Schultz, M.; Burns, C.J.; Schwartz, D.J.; Andersen, R.A.

2000-03-06

392

I. Electronic properties of cyclopentadienyl ytterbium complexes. II. Copper (I) complexes as synthetic precursors to cadmium sulfide/cuprous sulfide photovoltaic cells  

SciTech Connect

A brief review of organometallic lanthanide chemistry is given. Adduct formation of tris(cyclopentadienyl)ytterbium with a variety of Lewis bases in non-coordinating solvents can be quantitatively monitored by electronic absorption and emission spectral changes. Resulting spectral changes have been used to postulate the energy manifolds for the /sup 2/F/sub (7/2)/ and /sup 2/F/sub (5/2)/ states of the adducts. The fundamental principles of p-n junctions are discussed alongf with a brief review of cadmium sulfide/cuprous sulfide solar cells. Topics include the properties of semiconductors, (the properties of) p-n junction, and solar cells; fabrication of CdS/Cu/sub 2/S solar cells; and characterization of CdS/Cu/sub 2/S solar cells. Amyl alcohol solutions of the bis(2,2'-biquinoline) copper (I) cation, I, react with single-crystal, n-type CdS to yield n-CdS/p-Cu/sub 2/S heterojunctions. The intense visible absorption band of I (lambda/sub max/ 545 nm; epsilon approx.6300 M/sup -1/ cm/sup -1/ at 25/sup 0/C) provides an in situ spectrophotometric probe of heterojunction formation: spectral changes can be correlated with the extent of reaction. Kinetic studies using the nitrate salt of I reveal that initial reaction rates are directly proportional to Cds macroscopic surface area, first order in concentration of I, and temperature dependent with an apparent activation energy of 13 +/- 2 kcal/mol between 60 and 90/sup 0/C. Mechanistic aspects of the reaction are discussed.

Schlesener, C.J.

1982-01-01

393

A novel ytterbium-169 brachytherapy source and delivery system for use in conjunction with minimally invasive wedge resection of early-stage lung cancer  

PubMed Central

PURPOSE To describe a novel source–delivery system for intraoperative brachytherapy in patients with early-stage lung cancer that is readily adaptable to a video-assisted thoracoscopic surgery approach and can be precisely delivered to achieve optimal dose distribution. METHODS AND MATERIALS Radioactive ytterbium-169 (169Yb) was sealed within a titanium tube 0.28 mm in diameter and then capped and resealed by titanium wires laser welded to the tube to serve as the legs of a tissue-fastening system. Dose simulations were performed using Monte Carlo computer code (Los Alamos National Laboratory, Los Alamos, NM) to mimic the geometric and elemental compositions of the source, fastening apparatus, and surroundings. RESULTS Five test source capsules were subjected to a tensile load to failure. Failure in each capsule occurred in the wire of the fastener leg; there were no weld failures. Monte Carlo simulations and subsequent dose measurement showed the perturbation by the source legs in the deployed (bent over) position to be small (4–5%) for 169Yb and much less than that for iodine-125 (32%). CONCLUSION We have developed a 169Yb brachytherapy source–delivery system that can be used in conjunction with commercially available surgical stapling instruments, facilitates the precise placement of brachytherapy sources relative to the surgical margin, assures the seeds remain fixed in their precise position for the duration of the treatment, overcomes the technical difficulties of manipulating the seeds through the narrow surgical incision associated with video-assisted thoracoscopic surgery, and reduces the radiation dose to the clinicians. PMID:20705525

Leonard, Kara Lynne; DiPetrillo, Thomas A.; Munro, John J.; Wazer, David E.

2011-01-01

394

ELSEVIER Earth-Science Reviews 41 (1996) 117-175 A review of tufa and travertine deposits of the world  

E-print Network

ELSEVIER Earth-Science Reviews 41 (1996) 117-175 A review of tufa and travertine deposits, UK b School of Geography and Earth Resources, University of Hull, Hull, HU6 7RX, UK Received 5 material. While the majority of tufa deposits are of post-glacial age some of the most spectacular

Parker, Gary

395

Digital Object Identifier (DOI) 10.1007/s00205-004-0343-4 Arch. Rational Mech. Anal. 175 (2005) 343387  

E-print Network

Digital Object Identifier (DOI) 10.1007/s00205-004-0343-4 Arch. Rational Mech. Anal. 175 (2005) 343 in random media, the limiting cases of which include the standard radiative transfer limit, the geometrical by one of the 6 different types of transport (Boltz- mann or Fokker-Planck) equations depending

Fannjiang, Albert

396

vol. 175, no. 5 the american naturalist may 2010 Cannibals in Space: The Coevolution of Cannibalism and  

E-print Network

vol. 175, no. 5 the american naturalist may 2010 Cannibals in Space: The Coevolution of Cannibalism March 19, 2010 Online enhancement: appendix. abstract: The propensity for cannibalism varies of spatial structure affect the evolution of cannibalism and how cannibalism in turn drives the evolution

Rudolf, Volker H. W.

397

DT fusion neutron irradiation of BPNL niobium nickel and 316 stainless steel at 175°C  

Microsoft Academic Search

The DT fusion neutron irradiation at 175°C of 17 niobium wires, one niobium foil, 14 316 stainless steel wires, one 316 stainless steel foil, nine nickel wires, and two nickel foils from BPNL is described. The sample position, beam-on time, neutron dose record, and neutron fluence are given.

1977-01-01

398

USDA Forest Service Gen. Tech. Rep. PSW-GTR-193. 2004. 175 Invasive Exotic Plant Species in Sierra Nevada  

E-print Network

USDA Forest Service Gen. Tech. Rep. PSW-GTR-193. 2004. 175 Invasive Exotic Plant Species in Sierra/hcpd/species/t_e__spp/ann_te_rpt.shtml). Exotic plant species can directly compete with natives and cause their local displacement. In addition, and services of ecosystems. Potential impacts include alteration of disturbance regimes, changes in the food

Standiford, Richard B.

399

Physics of the Earth and Planetary Interiors 175 (2009) 816 Contents lists available at ScienceDirect  

E-print Network

Direct Physics of the Earth and Planetary Interiors journal homepage: www.elsevier.com/locate/pepi GRiD MT (gridPhysics of the Earth and Planetary Interiors 175 (2009) 8­16 Contents lists available at Science inversion a b s t r a c t We have developed and implemented a new grid-based earthquake analysis system

Kawakatsu, Hitoshi

400

Journal of Materials Education Vol. 31 (3-4): 175 -200 (2009) DEVELOPING A TEST FOR ASSESSING UNDERGRADUATE  

E-print Network

Journal of Materials Education Vol. 31 (3-4): 175 - 200 (2009) DEVELOPING A TEST FOR ASSESSING one lecture-based course #12;Mitin, Liu, Bell and Fulmer Journal of Materials Education Vol. 31 (3 of management, science policy, and ethics. Other efforts include the creation of two-year programs that prepare

Mitin, Vladimir

401

58. R. J. Alfidi et al., Radiology 143, 175 (1982); C. B. Higgins, R. Herfkens, M. J. Lipton, R. P.  

E-print Network

58. R. J. Alfidi et al., Radiology 143, 175 (1982); C. B. Higgins, R. Herfkens, M. J. Lipton, R. P. Sievers, P. Sheldon, L. Kaufman, Am. J. Car- diol. 52, 184 (1983); P. Lanzer et al., Radiology 150, 121 (1984). 59. E. S. Williams et al., J. Nucl. Med. 21, 449 (1980); T. J. Brady et al., Radiology 144, 343

Zare, Richard N.

402

Delineation of Stage Specific Expression of Plasmodium falciparum EBA-175 by Biologically Functional Region II Monoclonal Antibodies  

PubMed Central

Background The malaria parasite Plasmodium falciparum EBA-175 binds its receptor sialic acids on glycophorin A when invading erythrocytes. The receptor-binding region (RII) contains two cysteine-rich domains with similar cysteine motifs (F1 and F2). Functional relationships between F1 and F2 domains and characterization of EBA-175 were studied using specific monoclonal antibodies (mAbs) against these domains. Methods and Findings Five mAbs specific for F1 or F2 were generated. Three mAbs specific for F2 potently blocked binding of EBA-175 to erythrocytes, and merozoite invasion of erythrocytes (IC50 10 to 100 µg/ml IgG in growth inhibition assays). A mAb specific for F1 blocked EBA-175 binding and merozoite invasion less effectively. The difference observed between the IC50 of F1 and F2 mAbs was not due to differing association and disassociation rates as determined by surface plasmon resonance. Four of the mAbs recognized conformation-dependent epitopes within F1 or F2. Used in combination, F1 and F2 mAbs blocked the binding of native EBA-175 to erythrocytes and inhibited parasite invasion synergistically in vitro. MAb R217, the most potent, did not recognize sporozoites, 3-day hepatocyte stage parasites, nor rings, trophozoites, gametocytes, retorts, ookinetes, and oocysts but recognized 6-day hepatocyte stage parasites, and schizonts. Even though efficient at blocking binding to erythrocytes and inhibiting invasion into erythrocytes, MAb R217 did not inhibit sporozoite invasion and development in hepatocytes in vitro. Conclusions The role of the F1 and F2 domains in erythrocyte invasion and binding was elucidated with mAbs. These mAbs interfere with native EBA-175 binding to erythrocyte in a synergistic fashion. The stage specific expression of EBA-175 showed that the primary focus of activity was the merozoite stage. A recombinant RII protein vaccine consisting of both F1 and F2 domains that could induce synergistic activity should be optimal for induction of antibody responses that interfere with merozoite invasion of erythrocytes. PMID:21533224

Chattopadhyay, Rana; Ahumada, Adriana; Haynes, J. David; Fuhrmann, Steven R.; Wingard, Jennifer N.; Liang, Hong; Moch, J. Kathleen; Hoffman, Stephen L.

2011-01-01

403

Results of two LANL [beta]=0.175, 350-MHZ, 2-GAP spoke cavities  

SciTech Connect

Two {beta} = 0.175, 350 MHz, 2-gap superconducting (SC) spoke cavities were fabricated in industry under the Advanced Accelerator Applications (AAA) project for the transmutation of nuclear waste. These cavities are promising candidates for the accelerating structures between a RFQ and the elliptical SC cavities for proton and heavy ion linacs. Since their delivery in July 2002, they have been tested in terms of mechanical properties, low-temperature performance, i.e., Qo-Eaccc urves at 4 K and 2 K, surface resistance dependence on temperature and for multipacting (MP). The two cavities achieved accelerating fields of 13.5 MV/m and 13.0 MV/m as compared to the required field of 7.5 MV/m with enough margin for the quality factor. These cavities seem to need more time to condition away MP than elliptical cavities, but MP does not occur once the cavity is conditioned and kept at 4 K. The length of the 103 mm-diameter nominal coupler port was found to be too short for the penetrating field.

Tajima, T. (Tsuyoshi); Edwards, R. L. (Randall L.); Gentzlinger, R.C. (Robert C.); Krawczyk, F. L. (Frank L.); Ledford, J. E. (John E.); Liu, Jianfei; Montoya, D. I. (Debbie I.); Roybal, R. J. (Raymond J.(Ray); Schrage, D. L. (Dale L.); Shapiro, A. H. (Alan H.); Barni, D.; Bosotti, A.; Pagani, C. D.

2003-01-01

404

Oxidation of spent fuel in air at 175 degree to 195 degree C  

SciTech Connect

Oxidation tests in dry air were conducted on four LWR spent fuels at 175{degrees} and 195{degrees}C to determine the effect of the fuel characteristics on the oxidation state likely to exist at the time leaching occurs in a potential repository. Weight changes were measured and samples were examined by XRD, ceramography, TEM, and TGA. Despite local variations in the grain boundary susceptibility to oxidation, all four fuels progressed toward an apparent endpoint at an oxygen-to-metal (O/M) ratio of 2.4. The sole oxidation product was U{sub 4}O{sub 9+x,} a cubic phase structurally related to UO{sub 2} but with a slightly smaller lattice constant. The growth of the U{sub 4}O{sub 9+x} from the grain boundaries into the UO{sub 2} grains followed parabolic kinetics and had an activation energy of 26.6 kcal/mol. Based on the kinetics, the time required at 95{degrees}C to completely oxidize LWR spent fuel to U{sub 4}O{sub 9+x} would be at least 2000 yr. The next oxidation product to form after the U{sub 4}O{sub 9+x} phase may be U{sub 3}O{sub 8,} but no U{sub 3}O{sub 8} or other dilatational oxidation product has been detected in these accelerated tests conducted up to 25,000 h.

Einziger, R.E.; Buchanan, H.C.; Thomas, L.E. (Pacific Northwest Lab., Richland, WA (United States)); Stout, R.B. (Lawrence Livermore National Lab., CA (United States))

1992-04-01

405

Oxidation of spent fuel in air at 175{degree} to 195{degree}C  

SciTech Connect

Oxidation tests in dry air were conducted on four LWR spent fuels at 175{degrees} and 195{degrees}C to determine the effect of the fuel characteristics on the oxidation state likely to exist at the time leaching occurs in a potential repository. Weight changes were measured and samples were examined by XRD, ceramography, TEM, and TGA. Despite local variations in the grain boundary susceptibility to oxidation, all four fuels progressed toward an apparent endpoint at an oxygen-to-metal (O/M) ratio of 2.4. The sole oxidation product was U{sub 4}O{sub 9+x,} a cubic phase structurally related to UO{sub 2} but with a slightly smaller lattice constant. The growth of the U{sub 4}O{sub 9+x} from the grain boundaries into the UO{sub 2} grains followed parabolic kinetics and had an activation energy of 26.6 kcal/mol. Based on the kinetics, the time required at 95{degrees}C to completely oxidize LWR spent fuel to U{sub 4}O{sub 9+x} would be at least 2000 yr. The next oxidation product to form after the U{sub 4}O{sub 9+x} phase may be U{sub 3}O{sub 8,} but no U{sub 3}O{sub 8} or other dilatational oxidation product has been detected in these accelerated tests conducted up to 25,000 h.

Einziger, R.E.; Buchanan, H.C.; Thomas, L.E. [Pacific Northwest Lab., Richland, WA (United States); Stout, R.B. [Lawrence Livermore National Lab., CA (United States)

1992-04-01

406

Regulatory domains of the Gmhsp17.5-E heat shock promoter of soybean.  

PubMed Central

Promoter domains required for in vivo transcriptional expression of soybean heat shock gene Gmhsp17.5-E were identified by insertion-deletion mutagenesis with transgenic expression monitored in Agrobacterium tumefaciens-incited tumors of sunflower. Removal of the TATA-distal domain from position -1175 to position -259 had little effect on overall activity. The four regions contributing to promoter activity identified by this study all map within 244 base pairs from the start of transcription. The most distal cis-acting element of major significance was located from -244 to -179 and contains a conserved TATA-dyad motif centered at -220. Sequences from -179 to -40 comprise the TATA-proximal domain and include an AT-rich region and two sites containing heat shock consensus elements (HSEs). Deletion of the HSE centered at -93 (site 2) severely reduced transcriptional activity. Heat-inducible expression was also eliminated by internal deletion of either the TATA motif or the overlapping HSEs at site 1, indicating that each of these regions is also a major determinant of promoter activity. Images PMID:2796991

Czarnecka, E; Key, J L; Gurley, W B

1989-01-01

407

Efficient blue emission of ytterbium-doped Sr5(PO4)3F under quasi-three-level intracavity pumping  

NASA Astrophysics Data System (ADS)

We report an Yb:Sr5(PO4)3F (Yb:S-FAP) laser emitting at 985 nm intracavity pumped by a 912 nm diode-pumped Nd:GdVO4 laser. A 808 nm diode laser is used to pump the Nd:GdVO4 crystal emitting at 912 nm, and the Yb:S-FAP laser emitting at 985 nm intracavity pumped at 912 nm. With incident pump power of 17.5 W, intracavity second harmonic generation has been demonstrated with a power of 131 mW at 492.5 nm by using a LBO nonlinear crystal.

Yang, Y.; Cao, G. H.

2012-02-01

408

The flexibility of two tropomyosin mutants, D175N and E180G, that cause hypertrophic cardiomyopathy  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Well-known tropomyosin mutants, D175N and E180G are linked to cardiomyopathies. Black-Right-Pointing-Pointer The structural mechanics of D175N and E180G tropomyosins have been investigated. Black-Right-Pointing-Pointer D175N and E180G mutations increase both local and global tropomyosin flexibility. Black-Right-Pointing-Pointer In muscle, this increased flexibility will enhance myosin interactions on actin. Black-Right-Pointing-Pointer Extra myosin interaction can alter cardiac Ca{sup 2+}-switching, leading to dysfunction. -- Abstract: Point mutations targeting muscle thin filament proteins are the cause of a number of cardiomyopathies. In many cases, biological effects of the mutations are well-documented, whereas their structural and mechanical impact on filament assembly and regulatory function is lacking. In order to elucidate molecular defects leading to cardiac dysfunction, we have examined the structural mechanics of two tropomyosin mutants, E180G and D175N, which are associated with hypertrophic cardiomyopathy (HCM). Tropomyosin is an {alpha}-helical coiled-coil dimer which polymerizes end-to-end to create an elongated superhelix that wraps around F-actin filaments of muscle and non-muscle cells, thus modulating the binding of other actin-binding proteins. Here, we study how flexibility changes in the E180G and D175N mutants might affect tropomyosin binding and regulatory motion on F-actin. Electron microscopy and Molecular Dynamics simulations show that E180G and D175N mutations cause an increase in bending flexibility of tropomyosin both locally and globally. This excess flexibility is likely to increase accessibility of the myosin-binding sites on F-actin, thus destabilizing the low-Ca{sup 2+} relaxed-state of cardiac muscle. The resulting imbalance in the on-off switching mechanism of the mutants will shift the regulatory equilibrium towards Ca{sup 2+}-activation of cardiac muscle, as is observed in affected muscle, accompanied by enhanced systolic activity, diastolic dysfunction, and cardiac compensations associated with HCM and heart failure.

Li, Xiaochuan; Suphamungmee, Worawit [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States)] [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States); Janco, Miro; Geeves, Michael A. [School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ (United Kingdom)] [School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ (United Kingdom); Marston, Steven B. [National Heart and Lung Institute, Imperial College London, London W12 0NN (United Kingdom)] [National Heart and Lung Institute, Imperial College London, London W12 0NN (United Kingdom); Fischer, Stefan, E-mail: stefan.fischer@iwr.uni-heidelberg.de [Computational Biochemistry Group, University of Heidelberg, Heidelberg D-69120 (Germany)] [Computational Biochemistry Group, University of Heidelberg, Heidelberg D-69120 (Germany); Lehman, William, E-mail: wlehman@bu.edu [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States)] [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States)

2012-08-03

409

Optimally-output-coupled, 17.5 W, fiber-laser-pumped continuous-wave optical parametric oscillator  

Microsoft Academic Search

We present a stable, high-power, fiber-laser-pumped, continuous-wave (cw), singly resonant optical parametric oscillator (SRO) for the mid-infrared in an output-coupled (OC) configuration, providing 17.5 W of total output power at 61% extraction efficiency. Using a single-frequency, cw Yb fiber laser at 1064 nm and a 50-mm-long MgO:PPLN crystal, through optimization of signal output coupling we generate up to 9.8 W

S. Chaitanya Kumar; R. Das; G. K. Samanta; M. Ebrahim-Zadeh

2011-01-01

410

Optimally-output-coupled, 17.5 W, fiber-laser-pumped continuous-wave optical parametric oscillator  

Microsoft Academic Search

We present a stable, high-power, fiber-laser-pumped, continuous-wave (cw), singly resonant optical parametric oscillator (SRO) for the mid-infrared in an output-coupled (OC) configuration, providing 17.5 W of total output power at 61% extraction efficiency. Using a single-frequency, cw Yb fiber laser at 1064 nm and a 50-mm-long MgO:PPLN crystal, through optimization of signal output coupling we generate up to 9.8 W

S. Chaitanyaâ Kumar; R. Das; G. K. Samanta; M. Ebrahim-Zadeh

2010-01-01

411

Stable, 17.5 W, optimally-output-coupled, Yb-fiber-pumped mid-infrared optical parametric oscillator  

Microsoft Academic Search

We report stable, continuous-wave, mid-infrared optical-parametric-oscillator based on MgO:PPLN, pumped by Yb-fiber-laser, generating total power of 17.5W at 61% extraction efficiency, in TEM00(M2 Idier <1.24,M2 Signal<1.24) spatial mode with peak-peak idler power stability of 5% over 14 hours.

S. Chaitanya Kumar; Ritwick Das; G. K. Samanta; M. Ebrahim-Zadeh

2010-01-01

412

Evaluating HapMap SNP data transferability in a large-scale genotyping project involving 175 cancer-associated genes  

Microsoft Academic Search

One of the many potential uses of the HapMap project is its application to the investigation of complex disease aetiology\\u000a among a wide range of populations. This study aims to assess the transferability of HapMap SNP data to the Spanish population\\u000a in the context of cancer research. We have carried out a genotyping study in Spanish subjects involving 175 candidate

Gloria Ribas; Anna González-Neira; Antonio Salas; Roger L. Milne; Ana Vega; Begoña Carracedo; Emilio González; Eva Barroso; Lara P. Fernández; Patricio Yankilevich; Mercedes Robledo; Ángel Carracedo; Javier Benítez

2006-01-01

413

Is the dialysate calcium concentration of 1.75 mmol/L suitable for Chinese patients on maintenance hemodialysis?  

PubMed

We studied the effects of increasing the dialysate calcium concentration (DCa) to 1.75 mmol/L on controlling chronic kidney disease-mineral and bone disorder in Chinese patients on maintenance hemodialysis (MHD). We reviewed the data of MHD patients in one center (cohort 1) during prior 10 years and analyzed the risk factors of mortality and transference calcification (TC) in120 MHD patients surviving in 2003 (cohort 2). A multicenter, prospective, parallel-group, controlled trial (cohort 3) was also conducted from January 2011 to December 2012. The DCa at one center was increased from 1.5 to 1.75 mmol/L but was not changed at the other two centers. The clinical outcomes, biochemical parameters, medicine treatments, and TC markers [aortic arch calcification score (AoACS)] were compared between groups. In cohort 1, the annual mean serum iPTH increased significantly over 10 years. In cohort 1, 72 patients survived for 10 years, whose doses of calcium salts and active vitamin D3 and AoACs increased progressively. In cohort 2, the main cause of death was cardiocerebrovascular disease (CCVD) (n = 18, 48.6 %). Male sex and lower serum calcium concentrations were independent risk factors for CCVD mortality. In cohort 3, serum phosphorus, iPTH, and 25(OH)D decreased and serum calcium increased significantly; also, the doses of calcium and vitamin D3 decreased from 2011 to 2012 in the DCa 1.75 group. There were no significant differences in clinical outcomes either between groups or between the two calendar years. Our results indicate that increasing DCa to 1.75 mmol/L can decrease the elevated levels of serum iPTH and phosphorus, reduce the doses of calcium and vitamin D3, and be safe for short periods of time. PMID:24193439

Zhang, Dong-liang; Wang, Li-yan; Sun, Fang; Zhou, Yi-lun; Duan, Xiao-feng; Liu, Sha; Sun, Yi; Cui, Tai-gen; Liu, Wen-hu

2014-03-01

414

Design and evaluation of a 63 element 1.75-dimensional ultrasound phased array for treating benign prostatic hyperplasia  

NASA Astrophysics Data System (ADS)

Focused ultrasound surgery (FUS) is a clinical method for treating benign prostatic hyperplasia (BPH) in which tissue is noninvasively necrosed by elevating the temperature at the focal point above 60°C using short sonications. With 1.75-dimensional (1.75-D) arrays, the power and phase to the individual elements can be controlled electronically for focusing and steering. This research describes the design, construction and evaluation of a 1.75-D ultrasound phased array to be used in the treatment of benign prostatic hyperplasia. The array was designed with a steering angle of +/-13.5 deg in the transverse direction, and can move the focus in three parallel planes in the longitudinal direction with a relatively large focus size. A piezoelectric ceramic (PZT-8) was used as the material of the transducer and two matching layers were built for maximum acoustic power transmission to tissue. To verify the capability of the transducer for focusing and steering, exposimetry was performed and the results correlated well with the calculated fields. In vivo experiments were performed to verify the capability of the transducer to ablate tissue using short sonications. [Work supported by the Whitaker Foundation and the Department of Defense Congressionally Directed Medical Prostate Cancer Research Program.

Saleh, Khaldon Y.; Smith, Nadine B.

2003-10-01

415

Contrasting disease patterns in seropositive and seronegative neuromyelitis optica: A multicentre study of 175 patients  

PubMed Central

Background The diagnostic and pathophysiological relevance of antibodies to aquaporin-4 (AQP4-Ab) in patients with neuromyelitis optica spectrum disorders (NMOSD) has been intensively studied. However, little is known so far about the clinical impact of AQP4-Ab seropositivity. Objective To analyse systematically the clinical and paraclinical features associated with NMO spectrum disorders in Caucasians in a stratified fashion according to the patients' AQP4-Ab serostatus. Methods Retrospective study of 175 Caucasian patients (AQP4-Ab positive in 78.3%). Results Seropositive patients were found to be predominantly female (p < 0.0003), to more often have signs of co-existing autoimmunity (p < 0.00001), and to experience more severe clinical attacks. A visual acuity of ? 0.1 during acute optic neuritis (ON) attacks was more frequent among seropositives (p < 0.002). Similarly, motor symptoms were more common in seropositive patients, the median Medical Research Council scale (MRC) grade worse, and MRC grades ? 2 more frequent, in particular if patients met the 2006 revised criteria (p < 0.005, p < 0.006 and p < 0.01, respectively), the total spinal cord lesion load was higher (p < 0.006), and lesions ? 6 vertebral segments as well as entire spinal cord involvement more frequent (p < 0.003 and p < 0.043). By contrast, bilateral ON at onset was more common in seronegatives (p < 0.007), as was simultaneous ON and myelitis (p < 0.001); accordingly, the time to diagnosis of NMO was shorter in the seronegative group (p < 0.029). The course of disease was more often monophasic in seronegatives (p < 0.008). Seropositives and seronegatives did not differ significantly with regard to age at onset, time to relapse, annualized relapse rates, outcome from relapse (complete, partial, no recovery), annualized EDSS increase, mortality rate, supratentorial brain lesions, brainstem lesions, history of carcinoma, frequency of preceding infections, oligoclonal bands, or CSF pleocytosis. Both the time to relapse and the time to diagnosis was longer if the disease started with ON (p < 0.002 and p < 0.013). Motor symptoms or tetraparesis at first myelitis and > 1 myelitis attacks in the first year were identified as possible predictors of a worse outcome. Conclusion This study provides an overview of the clinical and paraclinical features of NMOSD in Caucasians and demonstrates a number of distinct disease characteristics in seropositive and seronegative patients. PMID:22260418

2012-01-01

416

Loss of Partitioning-Defective-3/Isotype-Specific Interacting Protein (Par-3/ASIP) in the Elongating Spermatid of RA175 (IGSF4A/SynCAM)-Deficient Mice  

PubMed Central

IGSF4a/RA175/SynCAM (RA175) and junctional adhesion molecules (Jams) are members of the immunoglobulin superfamily with a PDZ-binding domain at their C termini. Deficiency of Ra175 (Ra175?/?) as well as Jam-C deficiency (Jam-C?/?) causes the defect of the spermatid differentiation, oligo-astheno-teratozoospermia. Ra175?/? elongating spermatids fail to mature further, whereas Jam-C?/? round spermatids lose cell polarity, and most of Jam-C?/? elongated spermatids are completely lost. RA175 and Jam-C seem to have similar but distinct functional roles during spermatid differentiation. Here we show that the cell polarity protein Par-3 with PDZ domains, a binding partner of Jams, is one of the associated proteins of the cytoplasmic region of RA175 in testis. Par-3 and Jam-C are partly co-localized with RA175 in the elongating and elongated spermatids; their distributions overlapped with that of RA175 on the tips of the dorsal region of the head of the elongating spermatid (steps 9 to 12) in the wild type. In the Ra175?/? elongating spermatid, Par-3 was absent, and Jam-C was absent or abnormally localized. The RA175 formed a ternary complex with Jam-C via interaction with Par-3. The lack of the ternary complex in the Ra175?/? elongating spermatid may cause the defect of the specialized adhesion structures, resulting in the oligo-astheno-teratozoospermia. PMID:18055550

Fujita, Eriko; Tanabe, Yuko; Hirose, Tomonori; Aurrand-Lions, Michel; Kasahara, Tadashi; Imhof, Beat A.; Ohno, Shigeo; Momoi, Takashi

2007-01-01

417

Activation cross-sections of longer lived products of deuteron induced nuclear reactions on ytterbium up to 40 MeV  

E-print Network

In the frame of a systematic study of the activation cross-sections of the deuteron induced nuclear reactions, excitation functions of the natYb(d,xn)177,173,172mg,171mg,170,169Lu, natYb(d,x)175,169Yb and natYb(d,x)173,172,168,167,165Tm reactions are studied up to 40 MeV, a few of them for the first time. Cross-sections were measured with the activation method using a stacked foil irradiation technique and high resolution gamma-ray spectrometry. The experimental data are analyzed and compared to the results of the theoretical model codes ALICE-IPPE, EMPIRE-II and TALYS. From the measured cross-section data integral production yields were calculated. Applications of the new cross-sections are discussed.

F. Tárkányi; F. Ditrói; S. Takács; A. Hermanne; H. Yamazaki; M. Baba; A. Mohammadi; A. V. Ignatyuk

2013-02-21

418

J CompPhysiolA (1994) 175:437--447 9 Springer-Verlag1994 C.E. Gee -R.M. Robertson  

E-print Network

J CompPhysiolA (1994) 175:437--447 9 Springer-Verlag1994 C.E. Gee - R.M. Robertson Effects interneurons that were filled with Lucifer Yellow and identified by their morphology. Excitatory postsy- naptic

Robertson, Meldrum

419

Phosphorylation of CDK9 at Ser175 Enhances HIV Transcription and Is a Marker of Activated P-TEFb in CD4+ T Lymphocytes  

PubMed Central

The HIV transactivator protein, Tat, enhances HIV transcription by recruiting P-TEFb from the inactive 7SK snRNP complex and directing it to proviral elongation complexes. To test the hypothesis that T-cell receptor (TCR) signaling induces critical post-translational modifications leading to enhanced interactions between P-TEFb and Tat, we employed affinity purification–tandem mass spectrometry to analyze P-TEFb. TCR or phorbal ester (PMA) signaling strongly induced phosphorylation of the CDK9 kinase at Ser175. Molecular modeling studies based on the Tat/P-TEFb X-ray structure suggested that pSer175 strengthens the intermolecular interactions between CDK9 and Tat. Mutations in Ser175 confirm that this residue could mediate critical interactions with Tat and with the bromodomain protein BRD4. The S175A mutation reduced CDK9 interactions with Tat by an average of 1.7-fold, but also completely blocked CDK9 association with BRD4. The phosphomimetic S175D mutation modestly enhanced Tat association with CDK9 while causing a 2-fold disruption in BRD4 association with CDK9. Since BRD4 is unable to compete for binding to CDK9 carrying S175A, expression of CDK9 carrying the S175A mutation in latently infected cells resulted in a robust Tat-dependent reactivation of the provirus. Similarly, the stable knockdown of BRD4 led to a strong enhancement of proviral expression. Immunoprecipitation experiments show that CDK9 phosphorylated at Ser175 is excluded from the 7SK RNP complex. Immunofluorescence and flow cytometry studies carried out using a phospho-Ser175-specific antibody demonstrated that Ser175 phosphorylation occurs during TCR activation of primary resting memory CD4+ T cells together with upregulation of the Cyclin T1 regulatory subunit of P-TEFb, and Thr186 phosphorylation of CDK9. We conclude that the phosphorylation of CDK9 at Ser175 plays a critical role in altering the competitive binding of Tat and BRD4 to P-TEFb and provides an informative molecular marker for the identification of the transcriptionally active form of P-TEFb. PMID:23658523

Mbonye, Uri R.; Gokulrangan, Giridharan; Datt, Manish; Dobrowolski, Curtis; Cooper, Maxwell; Chance, Mark R.; Karn, Jonathan

2013-01-01

420

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 15, NO. 12, DECEMBER 2005 871 Local Oscillator Chain for 1.55 to 1.75 THz  

E-print Network

Chain for 1.55 to 1.75 THz With 100-W Peak Power Alain Maestrini, John S. Ward, Hamid Javadi, Charlotte on the design and performance of a fix-tuned 2 3 3 frequency multiplier chain that covers 1.55­1.75 THz across the band with a peak power of 100 W at 1.665 THz. A similar chain operated at room temperature

Ward, John

421

Optimally-output-coupled, 17.5 W, fiber-laser-pumped continuous-wave optical parametric oscillator  

Microsoft Academic Search

We present a stable, high-power, fiber-laser-pumped, continuous-wave (cw), singly resonant optical parametric oscillator (SRO)\\u000a for the mid-infrared in an output-coupled (OC) configuration, providing 17.5 W of total output power at 61% extraction efficiency.\\u000a Using a single-frequency, cw Yb fiber laser at 1064 nm and a 50-mm-long MgO:PPLN crystal, through optimization of signal output\\u000a coupling we generate up to 9.8 W

R. Das; G. K. Samanta; M. Ebrahim-Zadeh

2011-01-01

422

Functional requirement of dicer1 and miR-17-5p in reactive astrocyte proliferation after spinal cord injury in the mouse.  

PubMed

Reactive astrogliosis after spinal cord injury (SCI) contributes to glial scar formation that impedes axonal regeneration. The mechanisms underlying reactive astrocyte proliferation upon injury remain partially understood. MicroRNAs (miRNAs) function as a major class of post-transcriptional gene expression regulators that participate in many biological processes. However, miRNA function during reactive astrogliosis, particularly in injury-induced astrocyte proliferation, has not been carefully examined. In this study, we conditionally deleted Dicer1 gene encoding an enzyme that is required for mature miRNA generation, and examined the proliferative behavior of Dicer1-null reactive astrocytes in the transected mouse spinal cord. We found that injury-induced proliferation is blocked in Dicer1-null astrocytes. Previous reports indicate that miR-17-5p family members are upregulated during SCI. We therefore tested functional contribution of miR-17-5p to the proliferation of reactive astrocytes in vitro. Our results showed that a synthetic miR-17-5p mimic is able to rescue the proliferation defect of Dicer1-null astrocytes, while an antisense inhibitor of miR-17-5p blocked lipopolysaccharide-induced astrocytic proliferation. Similar results are also observed in leukemia inhibitory factor (LIF)-treated astroglial cultures suggesting that miR-17-5p particularly modulates reactive astrocyte proliferation initiated by LIF presumably via the JAK/STAT3 pathway. Furthermore, overexpression of miR-17-5p leads to decrease of several cell cycle regulators in cultured astroglia and astrocytoma cell line C6. Our conclusion is that miRNAs are indispensable to the injury-induced reactive astrocyte proliferation, and that miR-17-5p may be a major player regulating this pathological process by affecting cell cycle machinery. GLIA 2014. PMID:25043492

Hong, Peiwei; Jiang, Mei; Li, Hedong

2014-12-01

423

Studies on the Q175 Knock-in Model of Huntington's Disease Using Functional Imaging in Awake Mice: Evidence of Olfactory Dysfunction  

PubMed Central

Blood oxygen level dependent (BOLD) imaging in awake mice was used to identify differences in brain activity between wild-type, HETzQ175, and HOMzQ175 genotypes in response to the odor of almond. The study was designed to see how alterations in the huntingtin gene in a mouse model of Huntington’s disease would affect the perception and processing of almond odor, an evolutionarily conserved stimulus with high emotional and motivational valence. Moreover, the mice in this study were “odor naïve,” i.e., never having smelled almond or any nuts. Using a segmented, annotated MRI atlas of the mouse and computational analysis, 17 out of 116 brain regions were identified as responding differently to almond odor across genotypes. These regions included the glomerulus of the olfactory bulb, forebrain cortex, anterior cingulate, subiculum, and dentate gyrus of the hippocampus, and several areas of the hypothalamus. In many cases, these regions showed a gene-dose effect with HETzQ175 mice showing a reduction in brain activity from wild-type that is further reduced in HOMzQ175 mice. Conspicuously absent were any differences in brain activity in the caudate/putamen, thalamus, CA3, and CA1 of the hippocampus and much of the cortex. The glomerulus of the olfactory bulb in HOMzQ175 mice showed a reduced change in BOLD signal intensity in response to almond odor as compared to the other phenotypes suggesting a deficit in olfactory sensitivity. PMID:25071696

Ferris, Craig F.; Kulkarni, Praveen; Toddes, Steven; Yee, Jason; Kenkel, William; Nedelman, Mark

2014-01-01

424

IDCS J1426.5+3508: DISCOVERY OF A MASSIVE, INFRARED-SELECTED GALAXY CLUSTER AT z = 1.75  

SciTech Connect

We report the discovery of an IR-selected massive galaxy cluster in the IRAC Deep Cluster Survey (IDCS). We present new data from the Hubble Space Telescope and the W. M. Keck Observatory that spectroscopically confirm IDCS J1426.5+3508 at z = 1.75. Moreover, the cluster is detected in archival Chandra data as an extended X-ray source, comprising 53 counts after the removal of point sources. We calculate an X-ray luminosity of L{sub 0.5-2keV} = (5.4 {+-} 1.2) Multiplication-Sign 10{sup 44} erg s{sup -1} within r = 60 arcsec ({approx}1 Mpc diameter), which implies M{sub 200,L{sub x}}= (5.3{+-}1.6) Multiplication-Sign 10{sup 14} M{sub Sun }. IDCS J1426.5+3508 appears to be an exceptionally massive cluster for its redshift.

Stanford, S. A.; Zeimann, Greg [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); Brodwin, M. [Department of Physics and Astronomy, University of Missouri, Kansas City, MO 64110 (United States); Gonzalez, Anthony H.; Mancone, C. [Department of Astronomy, University of Florida, Gainesville, FL 32611 (United States); Stern, Daniel; Eisenhardt, P. R. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Dey, Arjun [NOAO, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Snyder, Gregory F., E-mail: stanford@physics.ucdavis.edu [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2012-07-10

425

175 MeV Au{sup +13} ion irradiation induced structural and morphological modifications in zinc oxide thin films  

SciTech Connect

Thin films of ZnO were deposited, on Si substrates, using the RF-sputtering technique and irradiated by the 175 MeV Au{sup +13} beams. The structural changes were investigated by x-ray diffraction (XRD) measurements. The particle size found to increase with the increasing ion fluence up to 1 Multiplication-Sign 10{sup 12} ion/cm{sup 2}. At highest irradiation fluence of 5 Multiplication-Sign 10{sup 12} ion/cm{sup 2} the average particle size decreases. The Raman spectroscopy measurements were performed to understand the local phonon mode of the samples. The surface morphology of the as-deposited and irradiated thin films is measured by the Atomic Force Microscopy (AFM).

Singh, Devendra [Materials Science Research Laboratory, Department of Physics, S. V. College, Aligarh 202001, UP (India); Sharma, Aditya [Materials Science Research Laboratory, Department of Physics, S. V. College, Aligarh 202001, UP (India) and Department of Applied Sciences and Humanities, Krishna Institute of Engineering and Technology, Ghaziabad-201206, U.P. (India); Varshney, Mayora; Verma, K. D. [Materials Science Research Laboratory, Department of Physics, S. V. College, Aligarh 202001, UP (India) and Department of Applied Sciences and Humanities, Krishna Institute of Engineering and Technolog (India); Kumar, Shalendra [School of Nano and Advanced Materials Engineering, Changwon National University, 9 Sarim-dong, Changwon- 641-773 (Korea, Republic of)

2013-02-05

426

Nanoscale phase separation of antiferromagnetic order and superconductivity in K0.75Fe1.75Se2  

PubMed Central

We report an in-plane optical spectroscopy study on the iron-selenide superconductor K0.75Fe1.75Se2. The measurement revealed the development of a sharp reflectance edge below Tc at frequency much smaller than the superconducting energy gap on a relatively incoherent electronic background, a phenomenon which was not seen in any other Fe-based superconductors so far investigated. Furthermore, the feature could be noticeably suppressed and shifted to lower frequency by a moderate magnetic field. Our analysis indicates that this edge structure arises from the development of a Josephson-coupling plasmon in the superconducting condensate. Together with the transmission electron microscopy analysis, our study yields compelling evidence for the presence of nanoscale phase separation between superconductivity and magnetism. The results also enable us to understand various seemingly controversial experimental data probed from different techniques. PMID:22355735

Yuan, R. H.; Dong, T.; Song, Y. J.; Zheng, P.; Chen, G. F.; Hu, J. P.; Li, J. Q.; Wang, N. L.

2012-01-01

427

Two Novel Toxin Variants Revealed by Whole-Genome Sequencing of 175 Clostridium botulinum Type E Strains.  

PubMed

We sequenced 175 Clostridium botulinum type E strains isolated from food, clinical, and environmental sources from northern Canada and analyzed their botulinum neurotoxin (bont) coding sequences (CDSs). In addition to bont/E1 and bont/E3 variant types, neurotoxin sequence analysis identified two novel BoNT type E variants termed E10 and E11. Strains producing type E10 were found along the eastern coastlines of Hudson Bay and the shores of Ungava Bay, while strains producing type E11 were only found in the Koksoak River region of Nunavik. Strains producing BoNT/E3 were widespread throughout northern Canada, with the exception of the coast of eastern Hudson Bay. PMID:25107978

Weedmark, K A; Lambert, D L; Mabon, P; Hayden, K L; Urfano, C J; Leclair, D; Van Domselaar, G; Austin, J W; Corbett, C R

2014-10-15

428

Downloaded 01 May 2003 to 128.175.116.163. Redistribution subject to AIP license or copyright, see http://ojps.aip.org/phf/phfcr.jsp Downloaded 01 May 2003 to 128.175.116.163. Redistribution subject to AIP license or copyright, see http://ojps.aip.org/phf  

E-print Network

http://ojps.aip.org/phf/phfcr.jsp #12;Downloaded 01 May 2003 to 128.175.116.163. Redistribution subject to AIP license or copyright, see http://ojps.aip.org/phf/phfcr.jsp #12;Downloaded 01 May 2003 to 128.175.116.163. Redistribution subject to AIP license or copyright, see http://ojps.aip.org/phf/phfcr.jsp #12;Downloaded 01 May

Prasad, Ajay K.

429

Hickey -TT175, casts 220, line 222-229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date/Time (MMDDYYHHMM) Total Scans  

E-print Network

Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date,220 #12;Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date #12;Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date

Hickey, Barbara

430

Evaluated 473 SSR primer pairs designed from a variety of pine Identified 175 SSR markers as polymorphic in longleaf pine; 125  

E-print Network

Summary Evaluated 473 SSR primer pairs designed from a variety of pine sequences Identified 175 marker database at ConiferGDB and provide access to these and other forest tree SSR sequences and primers of DNA (marker) is amplified by the polymerase chain reaction (PCR) using a pair of short DNAs (primer

431

Correlation of missions 191, 51M and helicopter photography. [aerial photography and mapping of three areas in Test Site 175 in Texas  

NASA Technical Reports Server (NTRS)

The data obtained during aerial photography flights using a helicopter are presented. The areas photographed are identified as three areas within Test Site 175: (1) Rosenberg, (2) Houston Ship Channel/Trinity Bay, and (3) the Somerville Dam. Data are presented in the form of charts. Reproductions of the aerial photographs are included.

Bryan, B. A.; Tunnel, S. H.

1972-01-01

432

Breakfast is served Monday -Friday, 7:00 am -10:30 am. Biscuit & Gravy $1.75 Sausage or Bacon Biscuit $2.00  

E-print Network

Breakfast Breakfast is served Monday - Friday, 7:00 am - 10:30 am. Biscuit & Gravy $1.75 Sausage or Bacon Biscuit $2.00 Side of Bacon or Sausage $1.35 Sausage or Bacon Toast $2.00 Toast (1 slice) $0 sandwiches with 6 slices of bacon, 2 sausage patties, your choice of Bacon, Sausage, or Ham. or another

Oklahoma, University of

433

Use of Salt Baths in the Temperature Range from 175 °C to 540 °C with Uncertainties of Less than 30 m°C  

Microsoft Academic Search

Calibration of thermometers in the temperature range from -80 °C to 550 °C requires liquid baths; alcohol, water, silicon oil, salt baths and dry block furnaces. In this study, the use of salt baths outside of their usual range of 250 °C to 540 °C for calibrating thermometers in the range between 175 °C and 250 °C is proposed. The

F. Melda Patan Alper; Ahmet T. Ince; Maria Aiordachioaiei

2011-01-01

434

Use of Salt Baths in the Temperature Range from 175 °C to 540 °C with Uncertainties of Less than 30 m°C  

NASA Astrophysics Data System (ADS)

Calibration of thermometers in the temperature range from -80 °C to 550 °C requires liquid baths; alcohol, water, silicon oil, salt baths and dry block furnaces. In this study, the use of salt baths outside of their usual range of 250 °C to 540 °C for calibrating thermometers in the range between 175 °C and 250 °C is proposed. The calibration range from 150 °C to 250 °C is usually covered by an oil bath, but utilizing a salt bath saves calibration time and resources, improves stability and homogeneity, allows longer term usage of the liquid, and reduces hazardous chemical vapors evaporated at temperatures above 175 °C. This proposal is based on a study of the uncertainty contributions at varying salt bath temperatures in the range from 175 °C to 540 °C which was carried out in this study. Results achieved and analyzed in this study indicate that the implementation of salt baths in this lower temperature range provides opportunities to calibrate reference and/or working thermometers with an uncertainty below 30 m°C, almost the same as the oil-bath uncertainty in the range of 175 °C to 250 °C. The main components of uncertainty contributed by a salt bath over this temperature range are discussed in this study.

Alper, F. Melda Patan; Ince, Ahmet T.; Aiordachioaiei, Maria

2011-01-01

435

41 CFR 302-9.175 - When I am authorized to transport a POV, including a replacement POV, to my post of duty...  

...POV, including a replacement POV, to my post of duty subsequent to the time of my assignment to that post of duty, may I have the manufacturer or...factory or other shipping point directly to my post of duty? 302-9.175 Section...

2014-07-01

436

IDCS J1426.5+3508: COSMOLOGICAL IMPLICATIONS OF A MASSIVE, STRONG LENSING CLUSTER AT z = 1.75  

SciTech Connect

The galaxy cluster IDCS J1426.5+3508 at z = 1.75 is the most massive galaxy cluster yet discovered at z > 1.4 and the first cluster at this epoch for which the Sunyaev-Zel'Dovich effect has been observed. In this paper, we report on the discovery with Hubble Space Telescope imaging of a giant arc associated with this cluster. The curvature of the arc suggests that the lensing mass is nearly coincident with the brightest cluster galaxy, and the color is consistent with the arc being a star-forming galaxy. We compare the constraint on M{sub 200} based upon strong lensing with Sunyaev-Zel'Dovich results, finding that the two are consistent if the redshift of the arc is z {approx}> 3. Finally, we explore the cosmological implications of this system, considering the likelihood of the existence of a strongly lensing galaxy cluster at this epoch in a {Lambda}CDM universe. While the existence of the cluster itself can potentially be accommodated if one considers the entire volume covered at this redshift by all current high-redshift cluster surveys, the existence of this strongly lensed galaxy greatly exacerbates the long-standing giant arc problem. For standard {Lambda}CDM structure formation and observed background field galaxy counts this lens system should not exist. Specifically, there should be no giant arcs in the entire sky as bright in F814W as the observed arc for clusters at z {>=} 1.75, and only {approx}0.3 as bright in F160W as the observed arc. If we relax the redshift constraint to consider all clusters at z {>=} 1.5, the expected number of giant arcs rises to {approx}15 in F160W, but the number of giant arcs of this brightness in F814W remains zero. These arc statistic results are independent of the mass of IDCS J1426.5+3508. We consider possible explanations for this discrepancy.

Gonzalez, Anthony H.; Fedeli, Cosimo; Mancone, Conor [Department of Astronomy, University of Florida, Gainesville, FL 32611-2055 (United States); Stanford, S. Adam; Zeimann, Greg [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); Brodwin, Mark [Department of Physics, University of Missouri, 5110 Rockhill Road, Kansas City, MO 64110 (United States); Dey, Arjun [NOAO, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Eisenhardt, Peter R. M.; Stern, Daniel [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)

2012-07-10

437

MiR-17-5p Impairs Trafficking of H-ERG K+ Channel Protein by Targeting Multiple ER Stress-Related Chaperones during Chronic Oxidative Stress  

PubMed Central

Background To investigate if microRNAs (miRNAs) play a role in regulating h-ERG trafficking in the setting of chronic oxidative stress as a common deleterious factor for many cardiac disorders. Methods We treated neonatal rat ventricular myocytes and HEK293 cells with stable expression of h-ERG with H2O2 for 12 h and 48 h. Expression of miR-17-5p seed miRNAs was quantified by real-time RT-PCR. Protein levels of chaperones and h-ERG trafficking were measured by Western blot analysis. Luciferase reporter gene assay was used to study miRNA and target interactions. Whole-cell patch-clamp techniques were employed to record h-ERG K+ current. Results H-ERG trafficking was impaired by H2O2 after 48 h treatment, accompanied by reciprocal changes of expression between miR-17-5p seed miRNAs and several chaperones (Hsp70, Hsc70, CANX, and Golga2), with the former upregulated and the latter downregulated. We established these chaperones as targets for miR-17-5p. Application miR-17-5p inhibitor rescued H2O2-induced impairment of h-ERG trafficking. Upregulation of endogenous by H2O2 or forced miR-17-5p expression either reduced h-ERG current. Sequestration of AP1 by its decoy molecule eliminated the upregulation of miR-17-5p, and ameliorated impairment of h-ERG trafficking. Conclusions Collectively, deregulation of the miR-17-5p seed family miRNAs can cause severe impairment of h-ERG trafficking through targeting multiple ER stress-related chaperones, and activation of AP1 likely accounts for the deleterious upregulation of these miRNAs, in the setting of prolonged duration of oxidative stress. These findings revealed the role of miRNAs in h-ERG trafficking, which may contribute to the cardiac electrical disturbances associated with oxidative stress. PMID:24386440

Wang, Qi; Hu, Weina; Lei, Mingming; Wang, Yong; Yan, Bing; Liu, Jun; Zhang, Ren; Jin, Yuanzhe

2013-01-01

438

miR-17-5p Downregulation Contributes to Paclitaxel Resistance of Lung Cancer Cells through Altering Beclin1 Expression  

PubMed Central

Non- small- cell lung cancer (NSCLC) is one of the most leading causes of cancer-related deaths worldwide. Paclitaxel based combination therapies have long been used as a standard treatment in aggressive NSCLCs. But paclitaxel resistance has emerged as a major clinical problem in combating non-small-cell lung cancer and autophagy is one of the important mechanisms involved in this phenomenon. In this study, we used microRNA (miRNA) arrays to screen differentially expressed miRNAs between paclitaxel sensitive lung cancer cells A549 and its paclitaxel-resistant cell variant (A549-T24). We identified miR-17-5p was one of most significantly downregulated miRNAs in paclitaxel-resistant lung cancer cells compared to paclitaxel sensitive parental cells. We found that overexpression of miR-17-5p sensitized paclitaxel resistant lung cancer cells to paclitaxel induced apoptotic cell death. Moreover, in this report we demonstrated that miR-17-5p directly binds to the 3?-UTR of beclin 1 gene, one of the most important autophagy modulator. Overexpression of miR-17-5p into paclitaxel resistant lung cancer cells reduced beclin1 expression and a concordant decease in cellular autophagy. We also observed similar results in another paclitaxel resistant lung adenosquamous carcinoma cells (H596-TxR). Our results indicated that paclitaxel resistance of lung cancer is associated with downregulation of miR-17-5p expression which might cause upregulation of BECN1 expression. PMID:24755562

Chatterjee, Abhisek; Chattopadhyay, Dhrubajyoti; Chakrabarti, Gopal

2014-01-01

439

Optimally-output-coupled, 17.5 W, fiber-laser-pumped continuous-wave optical parametric oscillator  

NASA Astrophysics Data System (ADS)

We present a stable, high-power, fiber-laser-pumped, continuous-wave (cw), singly resonant optical parametric oscillator (SRO) for the mid-infrared in an output-coupled (OC) configuration, providing 17.5 W of total output power at 61% extraction efficiency. Using a single-frequency, cw Yb fiber laser at 1064 nm and a 50-mm-long MgO:PPLN crystal, through optimization of signal output coupling we generate up to 9.8 W of signal power in the near-infrared together with 7.7 W of idler power for 28.6 W of pump, while in the absence of output coupling, 8.6 W of idler power is generated for the same pump power at 30% efficiency. The SRO is tunable over 360 nm in the idler range. The deployment of signal output coupling results in a total tuning of 513 nm (120 nm of signal, 393 nm of idler) over which watt-level output power can be extracted. Through careful control of thermal effects we achieve a long-term peak-to-peak idler power stability of 5% over 14 hours near room temperature. The output beams have TEM00 spatial profile with M 2<1.28 for the idler and M 2<1.37 for the signal.

Chaitanya Kumar, S.; Das, R.; Samanta, G. K.; Ebrahim-Zadeh, M.

2011-01-01

440

Evaluation of treatment outcome in 175 patients with Hodgkin lymphoma aged 60 years or over: the SHIELD study.  

PubMed

The SHIELD program for Hodgkin lymphoma in patients 60 years of age or older, prospectively evaluated clinical features and outcome in a large patient cohort (n = 175). The central element was a phase 2 study of VEPEMB chemotherapy (n = 103, median age 73 years) incorporating comorbidity assessment. A total of 72 other patients were treated off-study but registered prospectively and treated concurrently with: ABVD (n = 35); CLVPP (n = 19), or other (n = 18). Of VEPEMB patients, 31 had early-stage disease (stage 1A/2A) and received VEPEMB 3 times plus radiotherapy. Median follow-up was 36 months. Complete remission (CR) rate (intention-to-treat) was 74% and 3-year overall survival (OS) and progression-free survival (PFS) were 81% and 74%, respectively. A total of 72 patients had advanced-stage disease (stage 1B/2B/3 or 4) and received VEPEMB 6 times. CR rate was 61% with 3-year OS and PFS of 66% and 58%, respectively. Of patients achieving CR, 13% with early-stage and 5% with advanced-stage disease progressed. Overall treatment-related mortality was 7%. In patients treated with curative intent with VEPEMB, ABVD, and CLVPP (n = 157), CR linked to several factors in univariate analysis. In a Cox regression model only, obtaining CR remained significant for OS and CR plus comorbidity and age for PFS. RS-EBV status had no significant effect on outcome. PMID:22577177

Proctor, Stephen J; Wilkinson, Jennifer; Jones, Gail; Watson, Gillian C; Lucraft, Helen H; Mainou-Fowler, Tryfonia; Culligan, Dominic; Galloway, Michael J; Wood, Katrina M; McNally, Richard J Q; James, Peter W; Goodlad, John R

2012-06-21

441

HYDROGEN EFFECTS ON FRACTURE TOUGHNESS OF TYPE 316L STAINLESS STEEL FROM 175 K TO 425 K  

SciTech Connect

The effects of hydrogen on the fracture-toughness properties of Type 316L stainless steel from 175 K to 425 K were measured. Fracture-toughness samples were fabricated from Type 316L stainless steel forgings and hydrogen-charged with hydrogen at 34 MPa and 623 K for two weeks prior to testing. The effect of hydrogen on the J-Integral vs. crack extension behavior was measured at various temperatures by fracturing non-charged and hydrogen-charged samples in an environmental chamber. Hydrogen-charged steels had lower toughness values than non-charged ones, but still retained good toughness properties. The fracture-toughness values of hydrogen-charged samples tested near ambient temperature were about 70% of non-charged values. For hydrogen-charged samples tested at 225 K and 425 K, the fracture-toughness values were 50% of the non-charged values. In all cases, fracture occurred by microvoid nucleation and coalescence, although the hydrogen-charged samples had smaller and more closely spaced microvoids. The results suggest that hydrogen effects on toughness are greater at 225 K than they are at ambient temperature because of strain-induced martensite formation. At 425 K, the hydrogen effects on toughness are greater than they are at ambient temperature because of the higher mobility of hydrogen.

Morgan, M; Glenn Chapman, G

2009-05-04

442

Determination of the thermo-optic coefficient dn/dT of ytterbium doped ceramics (Sc2O3, Y2O3, Lu2O3, YAG), crystals (YAG, CaF2) and neodymium doped phosphate glass at cryogenic temperature  

NASA Astrophysics Data System (ADS)

In this paper, we report the measurements of the thermal expansion coefficient and the thermo-optic coefficient dn/dT for the ytterbium doped cubic sesquioxides (Sc2O3, Y2O3, Lu2O3) at cryogenic temperature. These materials appear to have very interesting properties for setting up high average power laser chains useful for plasma physics and for inertial fusion energy drivers. Measurements have also been done on YAG ceramic and crystal, CaF2 crystal, and neodymium phosphate glass (Hoya, LHG-8).

Cardinali, V.; Marmois, E.; Le Garrec, B.; Bourdet, G.

2012-04-01

443

Ag1.75InSb5.75Se11: A new noncentrosymmetric compound with congruent-melting behavior  

NASA Astrophysics Data System (ADS)

A new type of quaternary selenide Ag1.75InSb5.75Se11 has been synthesized. It crystallizes in the non-centrosymmetric space group Cm of monoclinic system, with a=13.419 (1) Å, b=4.084 (1) Å, and c=19.165 (2) Å, Z=2. The compound has a new three-dimensional layer structure which consists of infinite [AgSb2Se4]?2 layers and [Ag1(Sb6)Ag3InSb3Se8]?2 layers. The band gap of Ag1.75InSb5.75Se11 is 0.94(2) eV, which agrees with its dark gray color. Moreover, the compound exhibits congruent-melting behavior.

Hao, Wenyu; Han, Yemao; Huang, Rongjin; Feng, Kai; Yin, Wenlong; Yao, Jiyong; Wu, Yicheng

2014-10-01

444

Fe-site substitution effects on superconductivity and microstructure of phase-separated K0.8Fe1.75Se2 superconductor  

NASA Astrophysics Data System (ADS)

Series of Fe-site-substituted K0.8Fe1.75-xMxSe2 (M = Cu, Ni, Mn, Zn, Co, Cr) single crystals of nominal composition have been prepared and microstructural features have been studied. Systematic Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) investigations reveal that the substitution effect can be classified into two types: Ni, Co and Cr atoms can be homogenously doped into the superconducting stripes of the phase-separated K0.8Fe1.75Se2 system, while the Cu, Mn and Zn atoms can hardly be introduced into the superconducting stripes, which instead give rise to the formation of new non-superconducting K-M-Se phases embedded in the sample. The complex physical measurement data reported in the literature can be nicely explained by the microstructure picture.

Sun, Z. A.; Wang, Z.; Cai, Y.; Wang, Z. W.; Yang, H. X.; Tian, H. F.; Wu, S. L.; Zhang, R. X.; Ma, C.; Zhang, B.; Li, J. Q.

2014-03-01

445

Hour-glass magnetic spectrum arising from a striped cluster spin-glass ground state in La1.75Sr0.25CoO4  

NASA Astrophysics Data System (ADS)

We report inelastic neutron scattering results that reveal an hour-glass magnetic excitation spectrum in La1.75Sr0.25CoO4. The magnetic spectrum is similar to that observed previously in La1.67Sr0.33CoO4, but the spectral features are broader. We show that the spectrum of La1.75Sr0.25CoO4 can be modelled by the spin dynamics of a system with a disordered cluster spin glass ground state. Bulk magnetization measurements are presented that support the proposed glassy ground state. The observations reiterate the importance of quasi-one-dimensional magnetic correlations and disorder for the hour-glass spectrum, and suggest that disordered spin and charge stripes exist at lower doping in La2-xSrxCoO4 than previously thought.

Gaw, S. M.; Andrade, E. C.; Vojta, M.; Frost, C. D.; Adroja, D. T.; Prabhakaran, D.; Boothroyd, A. T.

2013-10-01

446

Scintillation properties of Yb3+-doped YAlO3 in the temperature range from 4.2 to 175 K  

NASA Astrophysics Data System (ADS)

We measured the temperature dependence of the emission wavelength spectrum of YAP:Yb by irradiating with ?-rays from a 90Sr/90Y source in the temperature range from 4.2 to 175 K. The light yield of YAP:Yb was characterized using an avalanche photodiode in the detection of 662-keV ?-rays from a 137Cs source in the temperature range from 50 to 175 K. The light yield was found to increase with decreasing temperature and reached 3840 photons/MeV at a temperature of 50 K. By extrapolating the temperature dependence of the light yield using that of the integrated emission spectra, the experimental light yield was evaluated to be 4300 photons/MeV at a temperature of 4.2 K.

Yasumune, T.; Kurihara, M.; Maehata, K.; Ishibashi, K.; Yoshikawa, A.

2013-10-01

447

Origin of a voluminous iron-enriched high-K rhyolite magma erupted in the North Japan Alps at 1.75 Ma: Evidence for upper crustal melting  

Microsoft Academic Search

The 1.75 Ma Chayano–Ebisutoge Pyroclastic Deposits (PD) is a large (300 km3 volume) eruptive unit consisting of ignimbrite, coignimbrite ash fall and pumice fall located in the central portion of the North Japanese Alps. The Chayano–Ebisutoge PD covered all central Japan, including the Osaka, Kyoto, Nagoya, Tokyo, and Niigata areas, distributed over a radius of >300 km. The tephra was erupted after a

Jun-Ichi Kimura; Yoshitaka Nagahashi

2007-01-01

448

A quantitative assay for binding and inhibition of Plasmodium falciparum Erythrocyte Binding Antigen 175 reveals high affinity binding depends on both DBL domains.  

PubMed

Plasmodium falciparum Erythrocyte Binding Antigen 175 (PfEBA-175) engages Glycophorin A (GpA) on erythrocytes during malaria infection. The two Duffy binding like domains (F1 and F2) of PfEBA-175 that form region II (RII) are necessary for binding GpA, and are the target of neutralizing antibodies. Recombinant production of RII in Pichia pastoris and baculovirus has required mutations to prevent aberrant glycosylation or deglycosylation resulting in modifications to the protein surface that may affect antibody recognition and binding. In this study, we developed a recombinant system in Escherichia coli to obtain RII and F2 without mutations or glycosylation through oxidative refolding. The system produced refolded protein with high yields and purity, and without the need for mutations or deglycosylation. Biophysical characterization indicated both proteins are well behaved and correctly folded. We also demonstrate the recombinant proteins are functional, and develop a quantitative functional flow cytometry binding assay for erythrocyte binding ideally suited to measure inhibition by antibodies and inhibitors. This assay showed far greater binding of RII to erythrocytes over F2 and that binding of RII is inhibited by a neutralizing antibody and sialyllactose, while galactose had no effect on binding. These studies form the framework to measure inhibition by antibodies and small molecules that target PfEBA-175 in a rapid and quantitative manner using RII that is unmodified or mutated. This approach has significant advantages over current methods for examining receptor-ligand interactions and is applicable to other erythrocyte binding proteins used by the parasite. PMID:24380803

Salinas, Nichole D; Tolia, Niraj H

2014-03-01

449

Effect of oxygen on phase formation and thermal stability of slowly cooled Zr 65Al 7.5Cu 17.5Ni 10 metallic glass  

Microsoft Academic Search

The effect of small amounts of oxygen (0.28–0.6at.%) on the phase formation and the thermal stability of bulk samples of the Zr65Al7.5Cu17.5Ni10 alloy prepared by die casting into a copper mould has been studied by X-ray diffraction, microstructural characterization and differential scanning calorimetry. In contrast to rapidly quenched ribbons, the crystalline volume fraction in slowly cooled bulk samples increases with

A. Gebert; J. Eckert; L. Schultz

1998-01-01

450

JOURNAL DE PHYSIQUE Colloque. C3, supplment au no 4, Tome 35, Aril 1974, page C3-175 PHOTOLUMINESCENCE DANS LE SULFWRE DE CADMIUM  

E-print Network

-175 PHOTOLUMINESCENCE DANS LE SULFWRE DE CADMIUM DOP� AU LITHIUM (*) J. L. PLOIX (**) et M. DUGUE Thomson-CSF (LCR), France Résumé. -Dans le but de réaliser des jonctions P-N électroiuminescentesdans le sulfure de cadmium étudié en photoIuminescence. Des platelettes de sulfure de cadmium obtenues en phase vapeur ont été

Boyer, Edmond

451

C-Terminal Substitution of HBV Core Proteins with Those from DHBV Reveals That Arginine-Rich 167RRRSQSPRR175 Domain Is Critical for HBV Replication  

PubMed Central

To investigate the contributions of carboxyl-terminal nucleic acid binding domain of HBV core (C) protein for hepatitis B virus (HBV) replication, chimeric HBV C proteins were generated by substituting varying lengths of the carboxyl-terminus of duck hepatitis B virus (DHBV) C protein for the corresponding regions of HBV C protein. All chimeric C proteins formed core particles. A chimeric C protein with 221–262 amino acids of DHBV C protein, in place of 146–185 amino acids of the HBV C protein, supported HBV pregenomic RNA (pgRNA) encapsidation and DNA synthesis: 40% amino acid sequence identity or 45% homology in the nucleic-acid binding domain of HBV C protein was sufficient for pgRNA encapsidation and DNA synthesis, although we predominantly detected spliced DNA. A chimeric C protein with 221–241 and 251–262 amino acids of DHBV C, in place of HBV C 146–166 and 176–185 amino acids, respectively, could rescue full-length DNA synthesis. However, a reciprocal C chimera with 242–250 of DHBV C (242RAGSPLPRS250) introduced in place of 167–175 of HBV C (167RRRSQSPRR175) significantly decreased pgRNA encapsidation and DNA synthesis, and full-length DNA was not detected, demonstrating that the arginine-rich 167RRRSQSPRR175 domain may be critical for efficient viral replication. Five amino acids differing between viral species (underlined above) were tested for replication rescue; R169 and R175 were found to be important. PMID:22911745

Kim, Taeyeung; Shin, Bo-Hye; Park, Gil-Soon; Park, Sun; Chwae, Yong-Joon; Shin, Ho-Joon; Kim, Kyongmin

2012-01-01

452

Water supply development for a new 17.5 MGD (66,200 m\\/d) brackish-water RO facility for the City of Hialeah, Florida  

Microsoft Academic Search

Freshwater supply limitations in Southeast Florida have caused a change in the water supply strategy for the next 30 years. As a result of the move away from the use of fresh groundwater, a 17.5 MGD (66,200 m\\/d) brackish-water desalination plant is under design for the City of Hialeah, Florida. Feedwater for this facility will be developed from the upper

Thomas M. Missimer; W. Scott Manahan; Robert G. Maliva; Weixing Guo; Loren Furland; Tory Champlin

2009-01-01

453

Use of Salt Baths in the Temperature Range from 175 °C to 540 °C with Uncertainties of Less than 30 m°C  

Microsoft Academic Search

Calibration of thermometers in the temperature range from ?80 °C to 550 °C requires liquid baths; alcohol, water, silicon\\u000a oil, salt baths and dry block furnaces. In this study, the use of salt baths outside of their usual range of 250 °C to 540 °C\\u000a for calibrating thermometers in the range between 175 °C and 250 °C is proposed. The calibration range from 150 °C to 250 °C

F. Melda Patan Alper; Ahmet T. Ince; Maria Aiordachioaiei

2011-01-01

454

Involvement of MAP3K8 and miR-17-5p in Poor Virologic Response to Interferon-Based Combination Therapy for Chronic Hepatitis C  

PubMed Central

Despite advances in chronic hepatitis C treatment, a proportion of patients respond poorly to treatment. This study aimed to explore hepatic mRNA and microRNA signatures involved in hepatitis C treatment resistance. Global hepatic mRNA and microRNA expression profiles were compared using microarray data between treatment responses. Quantitative real-time polymerase chain reaction validated the gene signatures from 130 patients who were infected with hepatitis C virus genotype 1b and treated with pegylated interferon-alpha and ribavirin combination therapy. The correlation between mRNA and microRNA was evaluated using in silico analysis and in vitro siRNA and microRNA inhibition/overexpression experiments. Multivariate regression analysis identified that the independent variables IL28B SNP rs8099917, hsa-miR-122-5p, hsa-miR-17-5p, and MAP3K8 were significantly associated with a poor virologic response. MAP3K8 and miR-17-5p expression were inversely correlated with treatment response. Furthermore, miR-17-5p repressed HCV production by targeting MAP3K8. Collectively, the data suggest that several molecules and the inverse correlation between mRNA and microRNA contributed to a host genetic refractory hepatitis C treatment response. PMID:24819603

Tsubota, Akihito; Mogushi, Kaoru; Aizaki, Hideki; Miyaguchi, Ken; Nagatsuma, Keisuke; Matsudaira, Hiroshi; Kushida, Tatsuya; Furihata, Tomomi; Tanaka, Hiroshi; Matsuura, Tomokazu

2014-01-01

455

Repression of miR-17-5p with elevated expression of E2F-1 and c-MYC in non-metastatic hepatocellular carcinoma and enhancement of cell growth upon reversing this expression pattern  

SciTech Connect

Highlights: •The oncogenic miR-17-5p is downregulated in non-metastatic hepatocellular carcinoma patients. •E2F-1 and c-MYC transcripts are upregulated in non-metastatic HCC patients. •miR-17-5p forced overexpression inhibited E2F-1 and c-MYC expression in HuH-7 cells. •miR-17-5p mimicking increased HuH-7 cell growth, proliferation, migration and colony formation. •miR-17-5p is responsible for HCC progression among the c-MYC/E2F-1/miR-17-5p triad members. -- Abstract: E2F-1, c-MYC, and miR-17-5p is a triad of two regulatory loops: a negative and a positive loop, where c-MYC induces the expression of E2F-1 that induces the expression of miR-17-5p which in turn reverses the expression of E2F-1 to close the loop. In this study, we investigated this triad for the first time in hepatocellular carcinoma (HCC), where miR-17-5p showed a significant down-regulation in 23 non-metastatic HCC biopsies compared to 10 healthy tissues; however, E2F-1 and c-MYC transcripts were markedly elevated. Forced over-expression of miR-17-5p in HuH-7 cells resulted in enhanced cell proliferation, growth, migration and clonogenicity with concomitant inhibition of E2F-1 and c-MYC transcripts expressions, while antagomirs of miR-17-5p reversed these events. In conclusion, this study revealed a unique pattern of expression for miR-17-5p in non-metastatic HCC patients in contrast to metastatic HCC patients. In addition we show that miR-17-5p is the key player among the triad that tumor growth and spread.

El Tayebi, H.M.; Omar, K.; Hegy, S.; El Maghrabi, M.; El Brolosy, M. [The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo (Egypt)] [The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo (Egypt); Hosny, K.A. [Department of General Surgery, Faculty of Medicine, Cairo University, Cairo (Egypt)] [Department of General Surgery, Faculty of Medicine, Cairo University, Cairo (Egypt); Esmat, G. [Department of Endemic Medicine and Hepatology, Cairo University, Cairo (Egypt)] [Department of Endemic Medicine and Hepatology, Cairo University, Cairo (Egypt); Abdelaziz, A.I., E-mail: ahmed.abdel-aziz@guc.edu.eg [The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo (Egypt)

2013-05-10

456

Effects of Two Familial Hypertrophic Cardiomyopathy Mutations in ?-Tropomyosin, Asp175Asn and Glu180Gly, on the Thermal Unfolding of Actin-Bound Tropomyosin  

PubMed Central

Differential scanning calorimetry was used to investigate the thermal unfolding of native ?-tropomyosin (Tm), wild-type ?-Tm expressed in Escherichia coli and the wild-type ?-Tm carrying either of two missense mutations associated with familial hypertrophic cardiomyopathy, D175N or E180G. Recombinant ?-Tm was expressed with an N-terminal Ala-Ser extension to substitute for the essential N-terminal acetylation of the native Tm. Native and Ala-Ser-Tm were indistinguishable in our assays. In the absence of F-actin, the thermal unfolding of Tm was reversible and the heat sorption curve of Tm with Cys-190 reduced was decomposed into two separate calorimetric domains with maxima at ?42 and 51°C. In the presence of phalloidin-stabilized F-actin, a new cooperative transition appears at 46–47°C and completely disappears after the irreversible denaturation of F-actin. A good correlation was found to exist between the maximum of this peak and the temperature of half-maximal dissociation of the F-actin/Tm complex as determined by light scattering experiments. We conclude that Tm thermal denaturation only occurs upon its dissociation from F-actin. In the presence of F-actin, D175N ?-Tm shows a melting profile and temperature dependence of dissociation from F-actin similar to those for wild-type ?-Tm. The actin-induced stabilization of E180G ?-Tm is significantly less than for wild-type ?-Tm and D175N ?-Tm, and this property could contribute to the more severe myopathy phenotype reported for this mutation. PMID:15454401

Kremneva, Elena; Boussouf, Sabrina; Nikolaeva, Olga; Maytum, Robin; Geeves, Michael A.; Levitsky, Dmitrii I.

2004-01-01

457

Structure and conductivity of strontium-doped cerium orthovanadates Ce{sub 1-x}Sr{sub x}VO{sub 4} (0{<=}x{<=}0.175)  

SciTech Connect

A-site substituted cerium orthovanadates, Ce{sub 1-x}Sr{sub x}VO{sub 4}, were synthesised by solid-state reactions. It was found that the solid solution limit in Ce{sub 1-x}Sr{sub x}VO{sub 4} is at x=0.175. The crystal structure was analysed by X-ray diffraction and it exhibits a tetragonal zircon structure of space group I4{sub 1}/amd (1 4 1) with a=7.3670 (3) and c=6.4894 (1) A for Ce{sub 0.825}Sr{sub 0.175}VO{sub 4}. The UV-vis absorption spectra indicated that the compounds have band gaps at room temperature in the range 4.5-4.6 eV. Conductivity measurements were performed for the first time up to the strontium solid solution limit in air and in dry 5% H{sub 2}/Ar with conductivity values at 600 {sup o}C ranging from 0.3 to 30 mS cm{sup -1} in air to 30-45 mS cm{sup -1} in reduced atmosphere. Sample Ce{sub 0.825}Sr{sub 0.175}VO{sub 4} is redox stable at a temperature below 600 {sup o}C although the conductivity is not high enough to be used as an electrode for solid oxide fuel cells. - Graphical abstract: A-site substituted cerium orthovanadates Ce{sub 1-x}Sr{sub x}VO{sub 4} were synthesised by solid state reaction and their conductivities measured in air and dry 5% H{sub 2}/Ar up to the strontium solid solution limit.

Petit, Christophe T.G.; Lan Rong; Cowin, Peter I. [Department of Chemistry, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom); Tao, Shanwen, E-mail: S.Tao@hw.ac.u [Department of Chemistry, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom)

2010-06-15

458

Megakaryocytic expression of miRNA 10a, 17-5p, 20a and 126 in Philadelphia chromosome-negative myeloproliferative neoplasm  

Microsoft Academic Search

Micro RNA (miRNA) are small non-coding RNA molecules which have a post-transcriptional inhibitory regulation function, e.g.\\u000a in megakaryopoiesis. A characteristic of Philadelphia chromosome-negative myeloproliferative neoplasm (Ph? MPN) is the abundance of morphologically aberrant megakaryocytes. Based on previously published in vitro megakaryocytic differentiation\\u000a assay data, we selected miRNA 10a, 17-5p, 20a and 126 and potential target proteins (HOXA1, RUNX1) for analysis

Kais Hussein; Wiebke Dralle; Katharina Theophile; Hans Kreipe; Oliver Bock

2009-01-01

459

Photoabsorption cross sections of CH3F, CHF3, CH3Cl, and CF2Cl2 from 175 to 760 A  

NASA Technical Reports Server (NTRS)

The study of fluorinated and chlorinated hydrocarbons is of great interest because of their suspected effect on the ozone layer in the atmosphere. Using synchrotron radiation as a continuum background, the present study measures photoelectrically the photoabsorption cross sections of CH3F, CHF3, CH3Cl, and CF2Cl2 in the 175-760 A (70.8-16.3 eV) region, using a double ionization chamber. The absolute absorption cross sections and a tentative interpretation of the observed discrete structures are presented.

Wu, C. Y. R.; Lee, L. C.; Judge, D. L.

1979-01-01

460

Pion Production by Protons on a Thin Beryllium Target at 6.4, 12.3, and 17.5 GeV/c Incident Proton Momenta  

E-print Network

An analysis of inclusive pion production in proton-beryllium collisions at 6.4, 12.3, and 17.5 GeV/c proton beam momentum has been performed. The data were taken by Experiment 910 at the Alternating Gradient Synchrotron at the Brookhaven National Laboratory. The differential $\\pi^+$ and $\\pi^-$ production cross sections ($d^2\\sigma/dpd\\Omega$) are measured up to 400 mRad in $\\theta_{\\pi}$ and up to 6 GeV/c in $p_{\\pi}$. The measured cross section is fit with a Sanford-Wang parameterization.

E910 Collaboration; I. Chemakin; V. Cianciolo; B. A. Cole; R. C. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. G. Kirk; J. M. Link; N. Maeda; R. L. McGrath; S. Mioduszewski; J. Monroe; D. Morrison; M. Moulson; M. N. Namboodiri; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; M. Sorel; S. Sorensen; J. H. Thomas; Y. Torun; D. L. Winter; X. Yang; W. A. Zajc; Y. Zhang

2007-07-16

461

Hypertrophic cardiomyopathy-causing Asp175asn and Glu180gly Tpm1 mutations shift tropomyosin strands further towards the open position during the ATPase cycle.  

PubMed

To understand the molecular mechanism by which the hypertrophic cardiomyopathy-causing Asp175Asn and Glu180Gly mutations in ?-tropomyosin alter contractile regulation, we labeled recombinant wild type and mutant ?-tropomyosins with 5-iodoacetamide-fluorescein and incorporated them into the ghost muscle fibers. The orientation and mobility of the probe were studied by polarized fluorimetry at different stages of the ATPase cycle. Multistep alterations in the position and mobility of wild type tropomyosin on the thin filaments during the ATP cycle were observed. Both mutations were found to shift tropomyosin strands further towards the open position and to change the affinity of tropomyosin for actin, with the effect of the Glu180Gly mutation being greater than Asp175Asn, showing an increase in the binding strong cross-bridges to actin during the ATPase cycle. These structural changes to the thin filament are likely to underlie the observed increased Ca(2+)-sensitivity caused by these mutations which initiates the disease remodeling. PMID:21376702

Borovikov, Yurii S; Rysev, Nikita A; Karpicheva, Olga E; Redwood, Charles S

2011-04-01

462

The effect of the Asp175Asn and Glu180Gly TPM1 mutations on actin-myosin interaction during the ATPase cycle.  

PubMed

Hypertrophic cardiomyopathy (HCM), characterized by cardiac hypertrophy and contractile dysfunction, is a major cause of heart failure. HCM can result from mutations in the gene encoding cardiac ?-tropomyosin (TM). To understand how the HCM-causing Asp175Asn and Glu180Gly mutations in ?-tropomyosin affect on actin-myosin interaction during the ATPase cycle, we labeled the SH1 helix of myosin subfragment-1 and the actin subdomain-1 with the fluorescent probe N-iodoacetyl-N'-(5-sulfo-1-naphtylo)ethylenediamine. These proteins were incorporated into ghost muscle fibers and their conformational states were monitored during the ATPase cycle by measuring polarized fluorescence. For the first time, the effect of these ?-tropomyosins on the mobility and rotation of subdomain-1 of actin and the SH1 helix of myosin subfragment-1 during the ATP hydrolysis cycle have been demonstrated directly by polarized fluorimetry. Wild-type ?-tropomyosin increases the amplitude of the SH1 helix and subdomain-1 movements during the ATPase cycle, indicating the enhancement of the efficiency of the work of cross-bridges. Both mutant TMs increase the proportion of the strong-binding sub-states, with the effect of the Glu180Gly mutation being greater than that of Asp175Asn. It is suggested that the alteration in the concerted conformational changes of actomyosin is likely to provide the structural basis for the altered cardiac muscle contraction. PMID:22155441

Rysev, Nikita A; Karpicheva, Olga E; Redwood, Charles S; Borovikov, Yurii S

2012-02-01

463

A measurement of the response of an SCG1-C scintillation glass shower detector to 2 17.5 GeV positrons  

NASA Astrophysics Data System (ADS)

We have measured the response of an electromagnetic shower counter constructed from the new scintillation glass (SCG1-C, Ohara Optical Glass, Inc.) to positrons in the energy range 2 to 17.5 GeV. We have measured the energy resolution of this 18.4 radiation length detector plus its attendant SF5 lead glass shower counter array to be ?/ E = (1.64±0.14)%+(1.13±0.33)%/? E with the constant term dominated by variations in the variations in the conversion point of the positron and shower leakage. We found this counter to be linear over the energy range examined. We have also measured the light output of the SCG1-C counter relative to light output of the SF5 lead glass guard blocks using 17.5 GeV positrons. We find that the SCG1-C counter produces 5.10±0.30 more light at the phototube than the SF5 lead glass counters.

Cox, B.; Hale, G.; Mazur, P. O.; Wagner, R. L.; Wagoner, D. E.; Areti, H.; Conetti, S.; Lebrun, P.; Ryan, T.; Brau, J. E.; Gearhart, R. A.

1984-02-01

464

Two-year results of interspinous spacer (X-Stop) implantation in 175 patients with neurologic intermittent claudication due to lumbar spinal stenosis.  

PubMed

The clinical outcome of patients with symptomatic lumbar spinal stenosis (LSS) was assessed during a follow-up period of 2 years after X-Stop implantation. The X-Stop is the most commonly used interspinous distraction device in patients with neurogenic intermittent claudication due to LSS. Between 2003 and 2007, more than 1,000 patients were examined in our centre with symptoms of intermittent claudication due to spinal stenosis. Between February 2003 and June 2007, in 175 of these patients an X-Stop device was implanted in one or two levels. Patients were clinically evaluated regularly during a follow-up period of up to 4 years using the VAS (leg pain) score and the Oswestry disability index. The mean VAS (leg pain) score in these 175 patients was reduced from 61.2% preoperatively to 39.0% at the first clinical follow-up examination at 6 weeks postoperatively. The mean VAS score at 24 months postoperatively was 39.0%. Oswestry score was 32.6% preoperatively, 22.7% at 6 weeks, and 20.3% at 24 months postoperatively on average. In eight out of the implanted 175 patients, the X-Stop had to be removed and a microsurgical decompression had to be performed because of unsatisfactory effect of the interspinous distraction device. Our single-centre results indicate not only a satisfactory short-term, but also a good long-term effect during a follow-up period of 2 years. Functional MRI examinations provide helpful, positional-dependent preoperative information. More than any radiological feature, the typical clinical picture of positional-dependent claudication with a relief of symptoms during flexion is the most important factor for appropriate patient selection. The interspinous device does not replace microsurgical decompression in patients with massive stenosis and continuous claudication, but offers a save, effective and less invasive alternative in selected patients with spinal stenosis. Concerning the operative technique, a minimally invasive implantation with preservation of the interspinous ligament is appropriate. Functional (upright-) MRI examinations were able to demonstrate the positional-dependent stenosis. If available, fMRI represents the most helpful radiologic examination in assessing the outcome of interspinous spacer implantation. PMID:19387698

Kuchta, Johannes; Sobottke, Rolf; Eysel, Peer; Simons, Patrick

2009-06-01

465

Calculation of hyperfine structure constants for ytterbium  

E-print Network

We calculate energies and hyperfine structure constants A and B for low-lying levels of $^{173}$Yb. The latter is treated as a two-electron atom. To account for valence-valence correlations the configuration interaction method is used. Valence-core correlations are accounted for within the many-body perturbation theory which is used to construct effective two-electron operators in the valence space.

Porsev, S G; Kozlov, M G; Rakhlina, Yu.G.

1999-01-01

466

Surface Studies of High Voltage Lithium Rich Composition: Li1.2Mn0.525Ni0.175Co0.1O2  

SciTech Connect

This article reports the evidence of surface film formation because of the breakdown of electrolyte upon high voltage cycling (4.9 V) of lithium rich cathode having a nominal composition of, Li1.2Mn0.525Ni0.175Co0.1O2. We studied the chemical composition of this passivation film using electrochemical impedance, X-ray Photoelectron and micro-Raman spectroscopy and the results were compared against the pristine electrode. In order to distinguish the changes in the surface films composition induced by prolonged electrochemical cycling versus chemical passivation effect, we also studied the surface composition of cathode powders aged with electrolytes at 60 oC. Our study shows that electrodes cycled beyond 150 cycles showed a rapid drop in capacity due to increase in the surface film resistance resulting in limited capacity utilization.

Martha, Surendra K [ORNL; Veith, Gabriel M [ORNL; Dudney, Nancy J [ORNL; Nanda, Jagjit [ORNL

2012-01-01

467

X-ray structure at 1.75 resolution of a norovirus 3C protease linked to an active site-directed peptide inhibitor  

SciTech Connect

Noroviruses are recognized universally as the most important cause of human epidemic non-bacterial gastroenteritis. Viral replication requires a 3C cysteine protease that cleaves a 200kDa viral polyprotein into its constituent functional proteins. Here we describe the X-ray structure of the Southampton norovirus 3C protease (SV3CP) bound to an active site-directed peptide inhibitor (MAPI) which has been refined at 1.75 resolution, following initial MAD phasing with a selenomethionine derivative. The inhibitor, acetyl-Glu-Phe-Gln-Leu-Gln-X, based on a 3C protease cleavage recognition sequences in the 200kDa polyprotein substrate, reacts covalently through its propenylethylester group (X) with the active site nucleophile, Cys 139. The 3C protease-inhibitor structure permits, for the first time, the identification of substrate recognition and binding groups and provides important new information for the development of antiviral prophylactics.

Cooper, Jon [University of Southampton, England; Coates, Leighton [ORNL; Hussey, Robert [University of Southampton, England

2010-01-01

468

Production of f 2(1270) and f 0(975) mesons by photons and hadrons of energy 65 175 GeV  

NASA Astrophysics Data System (ADS)

Measurements are reported of inclusive f 2(1270) and f 0(975) production in ?p, ?± p and K ± p collisions at photon beam energies of 65 to 175 GeV and hadron beam energies of 80 and 140 GeV. The f 2 and f 0 mesons were found at masses of 1.250 GeV and 0.961 GeV respectively. Inclusive f 2 production at low x F was found to have a similar p T dependence for each beam type, whereas an additional pion-exchange contribution was found for production by pions at high x F. Cross sections are compared with those for ?0 production and give no indication of a non-qbar q component in either f-meson state.

Apsimon, R. J.; Atkinson, M.; Baake, M.; Bagdasarian, L. S.; Barberis, D.; Brodbeck, T. J.; Brook, N.; Charity, T.; Clegg, A. B.; Coyle, P.; Danaher, S.; Danagulian, S.; Davenport, M.; Dickinson, B.; Diekmann, B.; Donnachie, A.; Doyle, A. T.; Eades, J.; Ellison, R. J.; Fiedler, F.; Flower, P. S.; Foster, J. M.; Galbraith, W.; Galumian, P. I.; Gapp, C.; Gebert, F.; Hallewell, G.; Heinloth, K.; Henderson, R. C. W.; Hickman, M. T.; Hoeger, K. C.; Hofmann, R. P.; Holzkamp, A.; Holzkamp, S.; Hughes-Jones, R. E.; Ibbotson, M.; Jacob, H. P.; Joseph, D.; Keemer, N. R.; Kingler, J.; Körsgen, G.; Kolya, S. D.; Lafferty, G. D.; McCann, H.; McClatchey, R.; McManus, C.; Mercer, D.; Morris, J. A. G.; Morris, J. V.; Newton, D.; O'Connor, A.; Oedingen, R.; Oganesian, A. G.; Ottewell, P. J.; Paterson, C. N.; Paul, E.; Reid, D.; Rotscheidt, H.; Sharp, P. H.; Söldner-Rembold, S.; Thacker, N. A.; Thompson, L.; Thompson, R. J.; Waterhouse, J.; Weigend, A. S.; Wilson, G. W.

1992-06-01

469

Photo- and hadro-production of ? (1020), K *(892)0 andoverline {K*} (892)^0 mesons in the energy range 65 to 175 GeV  

NASA Astrophysics Data System (ADS)

Inclusive production of ?, K *0, andoverline {K*^0 } mesons has been measured in ? p, ?± p and K ± p collisions at beam energies of 65 GeV< E ?<175 GeV and E ?/K =80 and 140 GeV. Cross sections have been determined over the range 0< x F<1.0 and 0< PT<1.8 GeV/c. Emphasis is put on the comparison of cross sections for different projectiles as a function of x F so as to study the effects of common quarks between the beam particle and the detected ?, K *0 oroverline {K*^0 } . The data are compared with a parton fusion model. Many features of the data are well explained. In detail the strange quark appears to carry a large fraction of the kaon momentum and the contribution of the valence quarks from the proton is small.

Apsimon, R. J.; Atkinson, M.; Baake, M.; Bagdasarian, L. S.; Barberis, D.; Brodbeck, T. J.; Brook, N.; Charity, T.; Clegg, A. B.; Coyle, P.; Danaher, S.; Danagulian, S.; Davenport, M.; Dickinson, B.; Diekmann, B.; Donnachie, A.; Doyle, A. T.; Eades, J.; Ellison, R. J.; Fiedler, F.; Flower, P. S.; Foster, J. M.; Galbraith, W.; Galumian, P. I.; Gapp, C.; Gebert, F.; Hallewell, G.; Heinloth, K.; Henderson, R. C. W.; Hickman, M. T.; Hoeger, K. C.; Hofmann, R. P.; Holzkamp, A.; Holzkamp, S.; Hughes-Jones, R. E.; Ibbotson, M.; Jakob, H. P.; Joseph, D.; Keemer, N. R.; Kingler, J.; Körsgen, G.; Kolya, S. D.; Lafferty, G. D.; McCann, H.; McClatchey, R.; McManus, C.; Mercer, D.; Morris, J. A. G.; Morris, J. V.; Newton, D.; O'Connor, A.; Oedingen, R.; Oganesian, A. G.; Ottewell, P. J.; Paterson, C. N.; Paul, E.; Reid, D.; Rotscheidt, H.; Sharp, P. H.; Soeldner-Rembold, S.; Thacker, N. A.; Thompson, L.; Thompson, R. J.; Waterhouse, J.; Weigend, A. S.; Wilson, G. W.

1994-09-01

470

Elevated expression of p53 gain-of-function mutation R175H in endometrial cancer cells can increase the invasive phenotypes by activation of the EGFR/PI3K/AKT pathway  

PubMed Central

Background p53 is the most commonly mutated tumor suppressor gene in human cancers. In addition to the loss of tumor suppression function and exertion of dominant-negative effects over the remaining wild-type protein, several p53 mutants can gain novel oncogenic functions (gain-of-function, GOF) that actively regulate cancer development and progression. In human endometrial cancer, p53 mutation is more often associated with aggressive nonendometrioid cancer. However, it was unknown if p53 mutants contributed to endometrial cancer progression through the GOF properties. Methods To clarify the relationship between expression of p53 GOF mutation (p53-R175H) and invasive potential of human endometrial cancer KLE cells, we tested the consequences of up-regulation and down-regulation of p53-R175H in KLE cells by inducing p53-R175H expression vector or suppressing the p53 gene with short hairpin RNA. Results We found that forced over-expression of p53-R175H significantly promoted cell migration and invasion, and induced activation of the epidermal growth factor receptor (EGFR)/phosphatidylinositol 3-kinase (PI3K)/AKT pathway. Conversely, suppression of p53-R175H with short hairpin RNA significantly inhibited cell migration and invasion, and resulted in attenuation of EGFR/PI3K/AKT pathway. Conclusion These findings show for the first time that elevated expression of p53-R175H mutant may exert gain-of-function activity to activate the EGFR/PI3K/AKT pathway and thus may contribute to the invasive phenotype in endometrial cancer. PMID:19917135

2009-01-01

471

Older Americans Act Amendments of 1987: A Summary of Provisions. Public Law 100-175. An Information Paper Prepared for Use by the Special Committee on Aging. United States Senate, 100th Congress, 1st Session.  

ERIC Educational Resources Information Center

The Older American Act Amendments of 1987 (Public Law 100-175) contain no major overhaul of the Act, but new provisions do significantly expand certain service components of the state and area agency on aging program under title III to address the special needs of certain populations, including the frail elderly living at home, residents of…

O'Shaughnessy, Carol

472

Pion production by protons on a thin berylLium target at 6.4, 12.3, and 17.5 GeV/c incident proton momenta  

E-print Network

An analysis of inclusive pion production in proton-berylLium collisions at 6.4, 12.3, and 17.5 GeV/c proton beam momentum has been performed. The data were taken by Experiment 910 at the Alternating Gradient Synchrotron at the Brookhaven National...

Chemakin, I.; Cianciolo, V.; Cole, B. A.; Fernow, R. C.; Frawley, A. D.; Gilkes, M.; Gushue, S.; Hartouni, E. P.; Hiejima, H.; Justice, M.; Kang, J. H.; Kirk, H. G.; Link, J. M.; Maeda, N.; McGrath, R. L.; Mioduszewski, Saskia; Monroe, J.; Morrison, D.; Moulson, M.; Namboodiri, M. N.; Rai, G.; Read, K.; Remsberg, L.; Rosati, M.; Shin, Y.; Soltz, R. A.; Sorel, M.; Sorensen, S.; Thomas, J. H.; Torun, Y.; Winter, D. L.; Yang, X.; Zajc, W. A.; Zhang, Y.

2008-01-01

473

Effects of 2.0-g 1.75-g and 1.5-g Hypergravity on Pregnancy Outcome in Rats (Rattus norvegicus)  

NASA Technical Reports Server (NTRS)

In 1995, ten pregnant female rats were launched on the Space Shuttle (STS-70) on Gestational day(G) 11 of their 22-day pregnancy as part of the NASA/NIH.Rodent (R)2 Experiment. Following landing on G20, fetuses were harvested from half of the dams, while the remaining five dams underwent birth. Spaceflight did not interrupt pregnancy, alter litter sizes, or affect body weights or gender ratios of the fetuses or neonates. In the present study we used the NASA/NIH.R2 experimental paradigm to analyze the effects of hypergravity on pregnancy outcome. On G10, time-bred Sprague-Dawley rat dams were assigned to either G20 or Birth conditions, then further assigned to Hypergravity (HG) 2.0-g, HG 1.75-g, HG 1.5-g, Rotational Control (RC, 1.03), or Stationary Control (SC, 1.0-g) treatments. Dams were exposed to continuous centrifugation from G11 through G20, with brief daily stops for animal health checks and maintenance. For both the G20 and Birth dams, comparable litter sizes and litter gender ratios were observed across gravity conditions. However, centrifugation-exposed (HG and RC) fetuses and neonates showed significantly lower body masses (p less than 0.05) relative to SC offspring. HG 2.0-g offspring weighed significantly less than those in all other gravity conditions (p less than 0.05). The observed reductions in offspring body mass at 1.5-g and 1.75-g, can be attributed to the rotational component of centrifugation, rather than to increased gravitational load, whereas 2.0-g hypergravity exposure further exacerbated the gravity centrifugation effect on offspring body mass. Pregnant dams exposed to centrifugation weighed significantly less than SC dams (p less than 0.05), suggesting that centrifugation effects on maternal body mass may contribute to reduced size of the developing offspring. These findings are consistent with previous reports of non-pregnant adult animals suggesting that, whereas spaceflight has virtually no effect on body mass, centrifugation is associated with changes in body weight regulation.

Mills, Nicole A.; Baer, Lisa A.; Ronca, April E.

2001-01-01

474

Decline in the frequencies of Borrelia burgdorferi OspA161 175-specific T cells after antibiotic therapy in HLA-DRB1*0401-positive patients with antibiotic-responsive or antibiotic-refractory lyme arthritis.  

PubMed

Synovitis in patients with antibiotic-refractory Lyme arthritis persists for months to several years after antibiotic therapy. This course, which may result from infection-induced autoimmunity, is associated with T cell recognition of Borrelia burgdorferi outer surface protein A (OspA(161-175)) and with HLA-DR molecules that bind this epitope, including the DRB1*0401 molecule. In this study, we used tetramer reagents to determine the frequencies of OspA(161-175)-specific T cells in samples of PBMC and synovial fluid mononuclear cells (SFMC) from 13 DRB1*0401-positive patients with antibiotic-responsive or antibiotic-refractory arthritis. Initially, three of the six patients (50%) with antibiotic-responsive arthritis and four of the seven patients (57%) with antibiotic-refractory arthritis had frequencies of OspA(161-175)-specific CD4(+) T cells in peripheral blood above the cutoff value of 4 per 10(5) cells. Among the five patients with concomitant PBMC and SFMC, four (80%) had OspA tetramer-positive cells at both sites, but the mean frequency of such cells was 16 times higher in SFMC, reaching levels as high as 1,177 per 10(5) cells. In the two patients in each patient group in whom serial samples were available, the frequencies of OspA(161-175)-specific T cells declined to low or undetectable levels during or soon after antibiotic therapy, months before the resolution of synovitis in the two patients with antibiotic-refractory arthritis. Thus, the majority of patients with Lyme arthritis initially have increased frequencies of OspA(161-175)-specific T cells. However, the marked decline in the frequency of such cells with antibiotic therapy suggests that persistent synovitis in the refractory group is not perpetuated by these cells. PMID:17947711

Kannian, Priya; Drouin, Elise E; Glickstein, Lisa; Kwok, William W; Nepom, Gerald T; Steere, Allen C

2007-11-01

475

Genetic Deletion of Transglutaminase 2 Does Not Rescue the Phenotypic Deficits Observed in R6/2 and zQ175 Mouse Models of Huntington's Disease  

PubMed Central

Huntington's disease (HD) is an autosomal dominant, progressive neurodegenerative disorder caused by expansion of CAG repeats in the huntingtin gene. Tissue transglutaminase 2 (TG2), a multi-functional enzyme, was found to be increased both in HD patients and in mouse models of the disease. Furthermore, beneficial effects have been reported from the genetic ablation of TG2 in R6/2 and R6/1 mouse lines. To further evaluate the validity of this target for the treatment of HD, we examined the effects of TG2 deletion in two genetic mouse models of HD: R6/2 CAG 240 and zQ175 knock in (KI). Contrary to previous reports, under rigorous experimental conditions we found that TG2 ablation had no effect on either motor or cognitive deficits, or on the weight loss. In addition, under optimal husbandry conditions, TG2 ablation did not extend R6/2 lifespan. Moreover, TG2 deletion did not change the huntingtin aggregate load in cortex or striatum and did not decrease the brain atrophy observed in either mouse line. Finally, no amelioration of the dysregulation of striatal and cortical gene markers was detected. We conclude that TG2 is not a valid therapeutic target for the treatment of HD. PMID:24955833

Menalled, Liliana B.; Kudwa, Andrea E.; Oakeshott, Steve; Farrar, Andrew; Paterson, Neil; Filippov, Igor; Miller, Sam; Kwan, Mei; Olsen, Michael; Beltran, Jose; Torello, Justin; Fitzpatrick, Jon; Mushlin, Richard; Cox, Kimberly; McConnell, Kristi; Mazzella, Matthew; He, Dansha; Osborne, Georgina F.; Al-Nackkash, Rand; Bates, Gill P.; Tuunanen, Pasi; Lehtimaki, Kimmo; Brunner, Dani; Ghavami, Afshin; Ramboz, Sylvie; Park, Larry; Macdonald, Douglas; Munoz-Sanjuan, Ignacio; Howland, David

2014-01-01

476

Light-ion production in the interaction of 175 MeV quasi-mono-energetic neutrons with iron and with bismuth  

E-print Network

Nuclear data for neutron-induced reactions in the intermediate energy range of 20 to 200 MeV are of great importance for the development of nuclear reaction codes since little data exist in that range. Also several different applications benefit from such data, notably accelerator-driven incineration of nuclear waste. The Medley setup was used for a series of measurements of p, d, t, $^3$He and $\\alpha$-particle production by 175 MeV quasi-mono-energetic neutrons on various target nuclei. The measurements were performed at the The Svedberg Laboratory in Uppsala, Sweden. Eight detector telescopes placed at angles between 20$^\\circ$ and 160$^\\circ$ were used. Medley uses the $\\Delta E$-$\\Delta E$-$E$ technique to discriminate among the particle types and is able to measure double-differential cross sections over a wide range of particle energies. This paper briefly describes the experimental setup, summarizes the data analysis and reports on recent changes in the previously reported preliminary data set on bismuth. Experimental data are compared with INCL4.5-Abla07, MCNP6 using CEM03.03, TALYS and PHITS model calculations as well as with nuclear data evaluations. The models agree fairly well overall but in some cases systematic differences are found.

R. Bevilacqua; K. Jansson; S. Pomp; P. Andersson; J. Blomgren; C. Gustavsson; A. Hjalmarsson; V. D. Simutkin; M. Österlund; A. J. Koning; A. V. Prokofiev; M. Hayashi; S. Hirayama; Y. Naitou; Y. Watanabe; U. Tippawan; S. G. Mashnik; L. M. Kerby; F. -R. Lecolley; N. Marie; J. -C. David; S. Leray

2014-11-12

477

17.5% p-Type Silicon Heterojunction Solar Cells with HWCVD a-Si:H as the Emitter and Back Contact  

SciTech Connect

Thin hydrogenated amorphous silicon (a-Si:H) layers deposited by hot-wire chemical vapor deposition (HWCVD) are used as both emitters and back contacts in silicon heterojunction solar cells. Low interface recombination velocity and high open-circuit voltage are achieved by a low substrate temperature (<150 deg C) intrinsic a-Si:H deposition which ensures immediate amorphous silicon deposition. This is followed by deposition of doped a-Si:H at a higher temperature (>200 deg C) which appears to improve dopant activation. With an i/n a-Si:H emitter, we obtain a confirmed efficiency of 17.1% on textured p-type float-zone (FZ) silicon with a screen-printed aluminum back-surface-field (Al-BSF) contact. Employing a-Si:H as both the front emitter and the back contact, we achieve a confirmed efficiency of 17.5%, the highest reported efficiency for a p-type c-Si based heterojunction solar cell.

Wang, T. H.; Page, M. R.; Iwaniczko, E.; Wang, Q.; Xu,Y.; Yan, Y.; Roybal, L.; Levi, D.; Bauer, R.; Branz, H. M.; Yelundur, V.; Rohatgi, A.

2005-11-01

478

Charge compensation and optimal stoichiometry in superconducting (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy  

NASA Astrophysics Data System (ADS)

The superconductive and magnetic properties of charge-compensated (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy (normally denoted as CLBLCO) are considered through quantitative examination of data for electrical resistivity, magnetic susceptibility, transition width, muon-spin rotation, x-ray absorption, and crystal structure. A derivative of LaBa2Cu3Oy, cation doping of this unique tetragonal cuprate is constrained by compensating La substitution for Ba with Ca substitution for La, where for 0 ? x ? 0.5 local maxima in TC occur for y near 7.15. It is shown that optimum superconductivity occurs for 0.4 ? x ? 0.5, that the superconductivity and magnetism observed are nonsymbiotic phenomena, and that charge-compensated doping leaves the carrier density in the cuprate planes nearly invariant with x, implying that only a small fraction of superconducting condensate resides therein. Applying a model of electronic interactions between physically separated charges in adjacent layers, the mean in-plane spacing between interacting charges, ?=7.1206 Å, and the distance between interacting layers, ? = 2.1297 Å, are determined for x = 0.45. The theoretical optimal TC0??-1?-1 of 82.3 K is in excellent agreement with experiment (?80.5 K), bringing the number of compounds for which TC0 is accurately predicted to 37 from six different superconductor families (overall accuracy of ±1.35 K).

Harshman, Dale R.; Fiory, Anthony T.

2012-10-01

479

Light-ion production in the interaction of 175 MeV quasi-mono-energetic neutrons with iron and with bismuth  

E-print Network

Nuclear data for neutron-induced reactions in the intermediate energy range of 20 to 200 MeV are of great importance for the development of nuclear reaction codes since little data exist in that range. Also several different applications benefit from such data, notably accelerator-driven incineration of nuclear waste. The Medley setup was used for a series of measurements of p, d, t, $^3$He and $\\alpha$-particle production by 175 MeV quasi-mono-energetic neutrons on various target nuclei. The measurements were performed at the The Svedberg Laboratory in Uppsala, Sweden. Eight detector telescopes placed at angles between 20$^\\circ$ and 160$^\\circ$ were used. Medley uses the $\\Delta E$-$\\Delta E$-$E$ technique to discriminate among the particle types and is able to measure double-differential cross sections over a wide range of particle energies. This paper briefly describes the experimental setup, summarizes the data analysis and reports on recent changes in the previously reported preliminary data set on bism...

Bevilacqua, R; Pomp, S; Andersson, P; Blomgren, J; Gustavsson, C; Hjalmarsson, A; Simutkin, V D; Österlund, M; Koning, A J; Prokofiev, A V; Hayashi, M; Hirayama, S; Naitou, Y; Watanabe, Y; Tippawan, U; Mashnik, S G; Kerby, L M; Lecolley, F -R; Marie, N; David, J -C; Leray, S

2014-01-01

480

WASP-104b and WASP-106b: two transiting hot Jupiters in 1.75-day and 9.3-day orbits  

E-print Network

We report the discovery from the WASP survey of two exoplanetary systems, each consisting of a Jupiter-sized planet transiting an 11th magnitude (V) main-sequence star. WASP-104b orbits its star in 1.75 d, whereas WASP-106b has the fourth-longest orbital period of any planet discovered by means of transits observed from the ground, orbiting every 9.29 d. Each planet is more massive than Jupiter (WASP-104b has a mass of $1.27 \\pm 0.05~\\mathrm{M_{Jup}}$, while WASP-106b has a mass of $1.93 \\pm 0.08~\\mathrm{M_{Jup}}$). Both planets are just slightly larger than Jupiter, with radii of $1.14 \\pm 0.04$ and $1.09 \\pm 0.04~\\mathrm{R_{Jup}}$ for WASP-104 and WASP-106 respectively. No significant orbital eccentricity is detected in either system, and while this is not surprising in the case of the short-period WASP-104b, it is interesting in the case of WASP-106b, because many otherwise similar planets are known to have eccentric orbits.

Smith, A M S; Armstrong, D J; Barros, S C C; Bonomo, A S; Bouchy, F; Brown, D J A; Cameron, A Collier; Delrez, L; Faedi, F; Gillon, M; Chew, Y Gómez Maqueo; Hébrard, G; Jehin, E; Lendl, M; Louden, T M; Maxted, P F L; Montagnier, G; Neveu-VanMalle, M; Osborn, H; Pepe, F; Pollacco, D; Queloz, D; Rostron, J W; Segransan, D; Smalley, B; Triaud, A H M J; Turner, O D; Udry, S; Walker, S R; West, R G; Wheatley, P J

2014-01-01

481

Ruling out unresolved binaries in five transitional disks VLT/NACO: deep 2.12 and 1.75 {\\mu}m narrow-band imaging  

E-print Network

Aims. We aim at detecting the presence of companions inside the inner hole/gap region of a sample of five well known transitional disks using spatially-resolved imaging in the near-IR with the VLT/NACO/S13 camera, which probes projected distances from the primary of typically 0.1 to 7 arcsec. The sample includes the stars DoAr 21, HD 135344B (SAO 206462), HR 4796A, T Cha, and TW Hya, spanning ages of less than 1 to 10 Myr, spectral types of A0 to K7, and hole/gap outer radii of 4 to 100 AU. Methods. In order to enhance the contrast and to avoid saturation at the core of the point-spread function (PSF), we use narrow-band filters at 1.75 and 2.12 {\\mu}m. The "locally optimized combination of images" (LOCI) algorithm is applied for an optimal speckle noise removal and PSF subtraction, providing an increase of 0.5-1.5 mag in contrast over the classic method. Results. With the proviso that we could have missed companions owing to unfavorable projections, the VLT/NACO observations rule out the presence of unresolv...

Vicente, Silvia; Hartung, Markus; Bouy, Herve; Huelamo, Nuria; Artigau, Etienne; Augereau, Jean-Charles; van Dishoeck, Ewine; Olofsson, Johan; Oliveira, Isa; Prusti, Timo

2011-01-01

482

The risks and benefits of long-term use of hydroxyurea in sickle cell anemia: A 17.5 year follow-up.  

PubMed

A randomized, controlled clinical trial established the efficacy and safety of short-term use of hydroxyurea in adult sickle cell anemia. To examine the risks and benefits of long-term hydroxyurea usage, patients in this trial were followed for 17.5 years during which they could start or stop hydroxyurea. The purpose of this follow-up was to search for adverse outcomes and estimate mortality. For each outcome and for mortality, exact 95% confidence intervals were calculated, or tests were conducted at alpha = 0.05 level (P-value <0.05 for statistical significance). Although the death rate in the overall study cohort was high (43.1%; 4.4 per 100 person-years), mortality was reduced in individuals with long-term exposure to hydroxyurea. Survival curves demonstrated a significant reduction in deaths with long-term exposure. Twenty-four percent of deaths were due to pulmonary complications; 87.1% occurred in patients who never took hydroxyurea or took it for <5 years. Stroke, organ dysfunction, infection, and malignancy were similar in all groups. Our results, while no longer the product of a randomized study because of the ethical concerns of withholding an efficacious treatment, suggest that long-term use of hydroxyurea is safe and might decrease mortality. PMID:20513116

Steinberg, Martin H; McCarthy, William F; Castro, Oswaldo; Ballas, Samir K; Armstrong, F Danny; Smith, Wally; Ataga, Kenneth; Swerdlow, Paul; Kutlar, Abdullah; DeCastro, Laura; Waclawiw, Myron A

2010-06-01

483

WASP-104b and WASP-106b: two transiting hot Jupiters in 1.75-day and 9.3-day orbits  

NASA Astrophysics Data System (ADS)

We have used the WASP survey to discover two exoplanetary systems, each consisting of a Jupiter-sized planet transiting an 11th-magnitude (V) main-sequence star. WASP-104b orbits its star in 1.75 d, whereas WASP-106b has the fourth-longest orbital period of any planet discovered by means of transits observed from the ground, orbiting every 9.29 d. Each planet is more massive than Jupiter (WASP-104b has a mass of 1.27 ± 0.05MJup, while WASP-106b has a mass of 1.93 ± 0.08MJup). Both planets are just slightly larger than Jupiter, with radii of 1.14 ± 0.04 and 1.09 ± 0.04RJup for WASP-104 and WASP-106, respectively. No significant orbital eccentricity is detected in either system, and while this is not surprising in the case of the short-period WASP-104b, it is interesting in the case of WASP-106b, because many otherwise similar planets are known to have eccentric orbits. Table 1 is available in electronic form at http://www.aanda.orgThe table of photometry is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/570/A64

Smith, A. M. S.; Anderson, D. R.; Armstrong, D. J.; Barros, S. C. C.; Bonomo, A. S.; Bouchy, F.; Brown, D. J. A.; Collier Cameron, A.; Delrez, L.; Faedi, F.; Gillon, M.; Gómez Maqueo Chew, Y.; Hébrard, G.; Jehin, E.; Lendl, M.; Louden, T. M.; Maxted, P. F. L.; Montagnier, G.; Neveu-VanMalle, M.; Osborn, H. P.; Pepe, F.; Pollacco, D.; Queloz, D.; Rostron, J. W.; Segransan, D.; Smalley, B.; Triaud, A. H. M. J.; Turner, O. D.; Udry, S.; Walker, S. R.; West, R. G.; Wheatley, P. J.

2014-10-01

484

Texture and elastic strains in hcp-iron plastically deformed up to 17.5 GPa and 600 K: experiment and model  

NASA Astrophysics Data System (ADS)

Internal elastic strains and textures are measured using monochromatic x-ray diffraction in ?-Fe plastically deformed up to 17.5 GPa and 600 K in the deformation-DIA. We observe the development of a strong 0?0?0?1 compression texture along with a strongly non-linear behavior of 0?0?0?2 lattice strains. We then use an elastoplastic self-consistent polycrystal model to simulate the macroscopic flow curves, internal strain and texture development within the sample. Input parameters are single-crystal elastic moduli, critical resolved shear stresses, and hardening behavior of the slip and twinning mechanisms. The model is found to reproduce the experiment data with basal slip as the easiest and most active deformation mechanism. Other active mechanisms are tensile twinning, prismatic and pyramidal slip. Tensile twinning is most active at lower temperatures (e.g. 400 K) and a higher strain rate. In most cases, the twinning activity occurs early in the deformation and later saturates. It is also responsible for the non-linear behavior of 0?0?0?2 lattice strains. Later in the deformation, the plastic activity of ?-Fe is controlled by basal, prismatic and pyramidal slip.

Merkel, Sébastien; Gruson, Marion; Wang, Yanbin; Nishiyama, Norimasa; Tomé, Carlos N.

2012-03-01

485

Comparison of photon and hadron induced production of ?0 mesons in the energy range of 65 to 175 GeV  

NASA Astrophysics Data System (ADS)

The inclusive production of ?0 mesons was measured in ? p and h ± p collisions at beam energies of 65 GeV? E ??175 GeV and E h =80, 140 GeV, respectively, where h is ? or K. Cross sections were determined for all beams and energies as functions of x F (-0.1? x F?1.0), p T (0? p T?3.5 GeV/c) and the polar decay angle of the ?0 by fitting the ?0 signal in ?+?- mass distributions. The ?0 line shape is found to be distorted from a pure Breit-Wigner distribution throughout most of the x F- p T plane for both photon and hadron beams and a simple explanation is suggested. Throughout the paper emphasis is put on the comparison of photon and hadron beam data. The comparison of cross sections of ? p and hp data provides a measure of the Vector Meson Dominance factor throughout the x F- p T range of the ?0. The ?0 production at low p T can be described for both photon and hadron beams by a triple regge model at large x F. Similarly central production is well described by the quark-antiquark fusion model. At large p T there is an excess of ?0 photoproduction which is consistent with the expected onset of pointlike photon interactions.

Apsimon, R. J.; Atkinson, M.; Baake, M.; Bagdasarian, L. S.; Barberis, D.; Brodbeck, T. J.; Brook, N.; Charity, T.; Clegg, A. B.; Coyle, P.; Danaher, S.; Danagulian, S.; Davenport, M.; Dickinson, B.; Diekmann, B.; Donnachie, A.; Doyle, A. T.; Eades, J.; Ellison, R. J.; Fiedler, F.; Flower, P. S.; Foster, J. M.; Galbraith, W.; Galumian, P. I.; Gapp, C.; Gebert, F.; Hallewell, G.; Heinloth, K.; Henderson, R. C. W.; Hickman, M. T.; Hoeger, K. C.; Hofmann, R. P.; Holzkamp, A.; Holzkamp, S.; Hughes-Jones, R. E.; Ibbotson, M.; Jakob, H. P.; Joseph, D.; Keemer, N. R.; Kingler, J.; Körsgen, G.; Kolya, S. D.; Lafferty, G. D.; McCann, H.; McClatchey, R.; McManus, C.; Mercer, D.; Morris, J. A. G.; Morris, J. V.; Newton, D.; O'Connor, A.; Oedingen, R.; Oganesian, A. G.; Ottewell, P. J.; Paterson, C. N.; Paul, E.; Raid, D.; Rotscheidt, H.; Sharp, P. H.; Soeldner-Rembold, S.; Thacker, N. A.; Thompson, L.; Thompson, R. J.; Waterhouse, J.; Weigend, A. S.; Wilson, G. W.

1992-12-01

486

CO2 adsorption studies on hydroxy metal carbonates M(CO3)x(OH)y (M = Zn, Zn-Mg, Mg, Mg-Cu, Cu, Ni, and Pb) at high pressures up to 175 bar.  

PubMed

Carbon dioxide (CO(2)) adsorption capacities of several hydroxy metal carbonates have been studied using the state-of-the-art Rubotherm sorption apparatus to obtain adsorption and desorption isotherms of these compounds up to 175 bar. The carbonate compounds were prepared by simply reacting a carbonate (CO(3)(2-)) solution with solutions of Zn(2+), Zn(2+)/Mg(2+), Mg(2+), Cu(2+)/Mg(2+), Cu(2+), Pb(2+), and Ni(2+) metal ions, resulting in hydroxyzincite, hydromagnesite, mcguinnessite, malachite, nullaginite, and hydrocerussite, respectively. Mineral compositions are calculated by using a combination of powder XRD, TGA, FTIR, and ICP-OES analysis. Adsorption capacities of hydroxy nickel carbonate compound observed from Rubotherm magnetic suspension sorption apparatus has shown highest performance among the other components that were investigated in this work (1.72 mmol CO(2)/g adsorbent at 175 bar and 316 K). PMID:21805978

Karadas, Ferdi; Yavuz, Cafer T; Zulfiqar, Sonia; Aparicio, Santiago; Stucky, Galen D; Atilhan, Mert

2011-09-01

487

Genotoxicological monitoring of 175 subjects living in the green belts, inner town or near chemical industrial estates in Greater Budapest agglomeration, Hungary.  

PubMed

We studied the effects of chronic low dose exposure to environmental pollutants on the peripheral blood lymphocytes (PBL) of subjects living in the green belts and the inner town, and/or working in the surrounding of industrial estates of Greater Budapest agglomeration, Hungary. The effects of some biological (gender, age, hematocrit and white blood cell counts), lifestyle (smoking, drinking habits and residential areas), and seasonal confounding factors were also considered. PBLs of 175 Hungarian donors of Budapest agglomeration, i.e. 45 subjects living in the green belts without significant genotoxic exposure (C1), 43 donors living in the inner town (C2), and 87 individuals living and/or working near chemical industrial estates (C3), were analysed for structural and numeric chromosome aberrations (CA), sister-chromatid exchanges (SCE), cell proliferation indices (lectine stimulation, LI; and proliferation rate index, PRI), and UV-light-induced unscheduled DNA synthesis (UDS). Each subject was interviewed personally and also investigated clinically. The three populations were matched for age, smoking and drinking habits. We excluded all donors with acute infectious and/or chronic non-infectious diseases, and/or with exposure to any known chemical hazard. For C1s, the base line CA and SCE frequencies were 0.25% and 6.41 per mitosis, respectively; in C2, these frequencies were 0.48% and 6.07 per mitosis, respectively, and in C3, these data were 1.60% and 5.71 per mitosis, respectively. A significant increase of CA due to chromosome type acentric fragments was demonstrated in the donors living in the inner town (C2), compared to those living in the green belts (C1). In C3s, significant (p < 0.05) elevations were found in the frequencies of gaps, aberrant cells, total aberrations (excluding gaps), chromatid and chromosome type aberrations, and in UDS, compared to C1s. Results indicate an increased genotoxicologic risk in donors living and/or working in industrial areas. Gender-related differences in SCE frequencies were demonstrated in C2 and C3; in the latter smoking-induced changes in UDS were also found. Light drinking did not appear to influence the results. PMID:9508360

Major, J; Jakab, M G; Tompa, A

1998-01-13

488

Ruling out unresolved binaries in five transitional disks. VLT/NACO deep 2.12 and 1.75 ?m narrow-band imaging  

NASA Astrophysics Data System (ADS)

Context. The presence of unresolved binaries on sub-arsecond scales could explain the existence of optically thin inner holes or gaps in circumstellar disks, which are commonly referred to as "transitional" or "cold" disks, and it is the first scenario to check before making any other assumptions. Aims: We aim at detecting the presence of companions inside the inner hole/gap region of a sample of five well known transitional disks using spatially-resolved imaging in the near-IR with the VLT/NACO/S13 camera, which probes projected distances from the primary of typically 0.1 to 7 arcsec. The sample includes the stars DoAr 21, HD 135344B (SAO 206462), HR 4796A, T Cha, and TW Hya, spanning ages of less than 1 to 10 Myr, spectral types of A0 to K7, and hole/gap outer radii of 4 to 100 AU. Methods: In order to enhance the contrast and to avoid saturation at the core of the point-spread function (PSF), we use narrow-band filters at 1.75 and 2.12 ?m. The "locally optimized combination of images" (LOCI) algorithm is applied for an optimal speckle noise removal and PSF subtraction, providing an increase of 0.5-1.5 mag in contrast over the classic method. Results: With the proviso that we could have missed companions owing to unfavorable projections, the VLT/NACO observations rule out the presence of unresolved companions down to an inner radius of about 0.1 arcsec from the primary in all five transitional disks and with a detection limit of 2 to 5 mag in contrast. In the disk outer regions the detection limits typically reach 8 to 9 mag in contrast and 4.7 mag for T Cha. Hence, the NACO images resolve part of the inner hole/gap region of all disks with the exception of TW Hya, for which the inner hole is only 4 AU. The 5? sensitivity profiles, together with a selected evolutionary model, allow to discard stellar companions within the inner hole/gap region of T Cha, and down to the substellar regime for HD 135344B and HR 4796A. DoAr 21 is the only object from the sample of five disks for which the NACO images are sensitive enough for a detection of objects less massive than ~13 MJup that is, potential giant planets or low-mass brown dwarfs at radii larger than ~76 AU (0.63 arcsec). Conclusions: These new VLT/NACO observations further constrain the origin of the inner opacity cavities to be owing to closer or lower-mass companions or other mechanisms such as giant planet formation, efficient grain growth, and photoevaporation (for DoAr 21 and HR 4796A).

Vicente, S.; Merín, B.; Hartung, M.; Bouy, H.; Huélamo, N.; Artigau, E.; Augereau, J.-C.; van Dishoeck, E.; Olofsson, J.; Oliveira, I.; Prusti, T.

2011-09-01

489

17O-NMR Knight shift study of the interplay between superconductivity and pseudogap in (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy  

NASA Astrophysics Data System (ADS)

We report systematic 17O-NMR measurements on the high-Tc cuprate (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy, for four different families (different x). Using Knight shift data, we show that the pseudogap opening temperature T* is much higher than Tc near optimal doping, unlike structurally similar YBCO. In addition, at constant doping the pseudogap temperature does not vary with x, in contrast to Tc. This puts constraints on the nature of the pseudogap and position of the quantum critical point inside the superconducting dome.

Cvitani?, T.; Pelc, D.; Požek, M.; Amit, E.; Keren, A.

2014-08-01

490

Tetragonal superconducting family (CaxLa1-x) (Ba1.75-xLa0.25+x)Cu3Oy: The effect of cosubstitution on the transition temperature  

Microsoft Academic Search

We have prepared a family (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy within the 1:2:3 high-temperature-superconductor system in which Ca occupies solely the Y site while La partly occupies the Y site and partly the Ba site. This family is characterized by constant charge (7.25) of the noncopper cations via compensating substitutions. It is tetragonal throughout the single-phase-existence range 0.0<=x<=0.5. Attempts to prepare CaLaBaCu3O7 were unsuccessful

D. Goldschmidt; G. M. Reisner; Y. Direktovitch; A. Knizhnik; E. Gartstein; G. Kimmel; Y. Eckstein

1993-01-01

491

Electrochemical and rate performance study of high-voltage lithium-richcomposition: Li1.2Mn0.525Ni0.175Co0.1O2  

SciTech Connect

We report electrochemical studies of high voltage cathodes composed of lithium rich layeredlayered material having the nominal composition Li1.2Mn0.525Ni0.175Co0.1O2, or equivalently 0.6Li[Li1/3Mn2/3]O2 0.4Li[Mn0.3Ni0.45Co0.25]O2. These aspects were investigated by cyclic voltammetry studies in conjunction with electrochemical impedance spectroscopy measurements to understand the redox reactions involving multiple transition metals and their capacity contribution at higher voltages, up to 4.9 V. Further, cathodes with 1.5 wt.% carbon nanofibers added to the Li1.2Mn0.525Ni0.175Co0.1O2 composite electrode showed stable reversible capacities of about 280 mAh g 1 when cycled to 4.9 V for more than 100 cycles, and almost a factor of two improvements in the rate performance compared to the electrode composition prepared using conventional composition (7.5% carbon black and 7.5% binder).

Martha, Surendra K [ORNL; Nanda, Jagjit [ORNL; Veith, Gabriel M [ORNL; Dudney, Nancy J [ORNL

2012-01-01

492

The neat ternary solid K(5-x)Co(1-x)Sn9 with endohedral [Co@Sn9]5- cluster units: a precursor for soluble intermetalloid [Co2@Sn17]5- clusters.  

PubMed

A new type of Zintl phase is presented that contains endohedrally filled clusters and that allows for the formation of intermetalloid clusters in solution by a one-step synthesis. The intermetallic compound K(5-x)Co(1-x)Sn(9) was obtained by the reaction of a preformed Co-Sn alloy with potassium and tin at high temperatures. The diamagnetic saltlike ternary phase contains discrete [Co@Sn(9)](5-) clusters that are separated by K(+) ions. The intermetallic compound K(5-x)Co(1-x)Sn(9) readily and incongruently dissolves in ethylenediamine and in the presence of 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane (2.2.2-crypt), thereby leading to the formation of crystalline [K([2.2.2]crypt)](5)[Co(2)Sn(17)]. The novel polyanion [Co(2)Sn(17)](5-) contains two Co-filled Sn(9) clusters that share one vertex. Both compounds were characterized by single-crystal X-ray structure analysis. The diamagnetism of K(5-x)Co(1-x)Sn(9) and the paramagnetism of [K([2.2.2]crypt)](5)[Co(2)Sn(17)] have been confirmed by superconducting quantum interference device (SQUID) and EPR measurements, respectively. Quantum chemical calculations reveal an endohedral Co(1-) atom in an [Sn(9)](4-) nido cluster for [Co@Sn(9)](5-) and confirm the stability of the paramagnetic [Co(2)Sn(17)](5-) unit. PMID:22887472

Hlukhyy, Viktor; He, Haiyan; Jantke, Laura-Alice; Fässler, Thomas F

2012-09-17

493

Both mature miR-17-5p and passenger strand miR-17-3p target TIMP3 and induce prostate tumor growth and invasion  

PubMed Central

MicroRNAs (miRNA) precursor (pre-miRNA) molecules can be processed to release a miRNA/miRNA* duplex. In the canonical model of miRNA biogenesis, one strand of the duplex is thought to be the biologically active miRNA, whereas the other strand is thought to be inactive and degraded as a carrier or passenger strand called miRNA* (miRNA star). However, recent studies have revealed that miRNA* strands frequently play roles in the regulatory networks of miRNA target molecules. Our recent study indicated that miR-17 transgenic mice could abundantly express both the mature miR-17-5p and the passenger strand miR-17-3p. Here, we showed that miR-17 enhanced prostate tumor growth and invasion by increasing tumor cell proliferation, colony formation, cell survival and invasion. miRNA target analysis showed that both miR-17-5p and miR-17-3p repressed TIMP metallopeptidase inhibitor 3 (TIMP3) expression. Silencing with small interfering RNA against TIMP3 promoted cell survival and invasion. Ectopic expression of TIMP3 decreased cell invasion and cell survival. Our results demonstrated that mature miRNA can function coordinately with its passenger strand, enhancing the repressive ability of a miRNA by binding the same target. Within an intricate regulatory network, this may be among the mechanisms by which miRNA can augment their regulatory capacity. PMID:23990326

Yang, Xiangling; Du, William W.; Li, Haoran; Liu, Fengqiong; Khorshidi, Anna; Rutnam, Zina Jeyapalan; Yang, Burton B.

2013-01-01

494

Heavy Fermion Scaling: Uranium versus Cerium and Ytterbium Compounds  

SciTech Connect

In an effort to explore the differences between rare-earth-based and uranium-based heavy fermion (HF) compounds that reflect the underlying difference between local 4f moments and itinerant 5f moments we analyze scaling laws that relate the low temperature neutron spectra of the primary ('Kondo-esque') spin fluctuation to the specific heat and susceptibility. While the scaling appears to work very well for the rare earth intermediate valence (IV) compounds, for a number of key uranium compounds the scaling laws fail badly. There are two main reasons for this failure. First, the presence of antiferromagnetic (AF) fluctuations, which contribute significantly to the specific heat, alters the scaling ratios. Second, the scaling laws require knowledge of the high temperature moment degeneracy, which is often undetermined for itinerant 5f electrons. By making plausible corrections for both effects, better scaling ratios are obtained for some uranium compounds. We point out that, while both the uranium HF compounds and the rare earth IV compounds have spin fluctuation characteristic energies of order 5-25 meV, they differ in that the AF fluctuations that are usually seen in the uranium compounds are never seen in the rare earth IV compounds. This suggests that the 5f itineracy increases the f-f exchange relative to the rare earth case.

Lawrence, J. M. [University of California, Irvine; Wang, Cuihuan [ORNL; Christianson, Andrew D [ORNL; Bauer, E. D. [Los Alamos National Laboratory (LANL)

2011-01-01

495

Nonlinear optical crystal optimized for Ytterbium laser host wavelengths  

DOEpatents

A material for harmonic generation has been made by substitutional changes to the crystal LaCa.sub.4 (BO.sub.3).sub.3 also known as LaCOB in the form Re1.sub.xRe2.sub.yRe3.sub.zCa.sub.4(B0.sub.3).sub.3O where Re1 and Re2, (rare earth ion 1 and rare earth ion 2) are selected from the group consisting of Sc, Yttrium, La, Ce, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb, and Lu; Re3 is Lanthanum; and x+y+z=1.

Ebbers, Christopher A. (Pleasanton, CA); Schaffers, Kathleen I. (Livermore, CA)

2008-05-27

496

Nonlinear optical crystal optimized for Ytterbium laser host wavelengths  

DOEpatents

A material for harmonic generation has been made by substitutional changes to the crystal LaCa.sub.4 (BO.sub.3).sub.3 also known as LaCOB in the form Re1.sub.xRe2.sub.yRe3.sub.zCa.sub.4(BO.sub.3).sub.3O where Re1 and Re2, (rare earth ion 1 and rare earth ion 2) are selected from the group consisting of Sc, Yttrium, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; Re3 is Lanthanum; and x+y+z=1.

Ebbers, Christopher A. (Livermore, CA); Schaffers, Kathleen I. (Pleasanton, CA)

2007-02-20

497

Nonlinear optical crystal optimized for ytterbium laser host wavelengths  

DOEpatents

A material for harmonic generation has been made by substitutional changes to the crystal LaCa.sub.4(BO.sub.3).sub.3 also known as LaCOB in the form Re1.sub.xRe2.sub.yRe3.sub.zCa.sub.4(B0.sub.3).sub.3O where Re1 and Re2, (rare earth ion 1 and rare earth ion 2) are selected from the group consisting of Sc, Yttrium, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; Re3 is Lanthanum; and x+y+z=1.

Ebbers, Christopher A. (Livermore, CA); Schaffers, Kathleen I. (Pleasanton, CA)

2007-08-21

498

The development of novel Ytterbium fiber lasers and their applications  

NASA Astrophysics Data System (ADS)

The aim of my Ph.D. research is to push the fundamental limits holding back the development of novel Yb fiber lasers with high pulse energy and short pulse duration. The purpose of developing these lasers is to use them for important applications such as multiphoton microscopy and laser-induced breakdown spectroscopy. My first project was to develop a short-pulse high-energy ultrafast fiber laser for multiphoton microscopy. To achieve high multiphoton efficiency and depth resolved tissue imaging, ultrashort pulse duration and high pulse energy are required. In order to achieve this, an all-normal dispersion cavity design was adopted. Output performances of the built lasers were investigated by varying several cavity parameters, such as pump laser power, fiber length and intra-cavity spectral filter bandwidth. It was found that the length of the fiber preceding the gain fiber is critical to the laser performance. Generally, the shorter the fiber is, the broader the output spectrum is. The more interesting parameter is the intra-cavity spectral filter bandwidth. Counter intuitively, laser cavities using narrower bandwidth spectral filters generated much broader spectra. It was also found that fiber lasers with very narrow spectral filters produced laser pulses with parabolic profile, which are referred to as self-similar pulses or similaritons. This type of pulse can avoid wave-breaking and is an optimal approach to generate pulses with high pulse energy and ultrashort pulse duration. With a 3nm intra-cavity spectral filter, output pulses with about 20 nJ pulse energy were produced and compressed to about 41 fs full-width-at-half-maximum (FWHM) pulse duration. Due to the loss in the compression device, the peak power of the compressed pulses is about 250 kW. It was the highest peak power generated from a fiber oscillator when this work was published. This laser was used for multiphoton microscopy on living tissues like Drosophila larva and fruit fly wings. Several imaging methods, such as two-photon-excited fluorescence, second harmonic generation, and third harmonic generation, were performed. Not only were single layers of thin tissue imaged, but also depth resolved imaging of thick samples was tested, and three-dimensional image reconstruction was demonstrated. The other project was to develop a simple fiber oscillator for laser-induced breakdown spectroscopy (LIBS). Laser pulses with high energy, high ablation efficiency and low ablation threshold are desirable for this application. We built a fiber laser using up to 200 m long fiber and scaled the output pulse energy up to 450 nJ. This laser was operated in an unusual mode-locking regime and produced noise-like pulses, which have a picosecond long pulse envelope containing multiple irregular femtosecond sub-pulses. This type of pulse was mostly ignored by many earlier researchers. Intra-cavity spectral filters did not affect the laser performance as much as in the similariton lasers and were removed from the laser cavity. Characteristics of our noise-like laser, such as MHz repetition rate, broad spectrum, and picosecond-long pulse envelope containing multiple femtosecond sub-pulses, were found to meet the requirement of an ideal laser source for LIBS. A simple LIBS setup using our laser was demonstrated and atomic emission spectra with very good signal-to-noise ratio were obtained. Composition detection, qualitative concentration determination, and trace detection were also tested. These tests show that our noise-like fiber laser is an ideal laser source for a low-cost and portable LIBS system.

Nie, Bai

499

Successive determination of praseodymium and ytterbium by coulometric complexometric titration  

Microsoft Academic Search

A method is described for the successive coulometric complexometric titration of microgram levels of light and heavy rare earth elements. The total amount of light and heavy rare earth elements is titrated by electrogenerating titrant EDTA on the mercury pool as a cathode. Then, the mercury pool is switched as an anode, electrogenerating Hg\\/sup 2 +\\/, and is used to

S. Chun-Nian; L. Jing-Ci; N. Qi-Dao; C. Mou-Sen

1982-01-01

500

Successive determination of praseodymium and ytterbium by coulometric complexometric titration  

SciTech Connect

A method is described for the successive coulometric complexometric titration of microgram levels of light and heavy rare earth elements. The total amount of light and heavy rare earth elements is titrated by electrogenerating titrant EDTA on the mercury pool as a cathode. Then, the mercury pool is switched as an anode, electrogenerating Hg/sup 2 +/, and is used to titrate EDTA which is displaced from its light rare earth elements complex by malic acid that has been added prior to the electrogenerating Hg/sup 2 +/. The heavy rare earth elements can be determined from the total rare earth elements minus the result of displacement titration of EDTA which is equivalent to the light rare earth elements. A 10-30 ..mu..g sample of light and heavy rare earth elements (Pr and Yb, La and Lu, Nd and Tm) can be determined successively. Errors and standard deviation are not more than 2.5% and 0.20, respectively. 2 tables, 5 figures.

Chun-Nian, S.; Jing-Ci, L.; Qi-Dao, N.; Mou-Sen, C.

1982-06-01