Powerful forces are at work in giant Lya nebulae, a rare and mysterious population in the high redshift universe. Much like the spatially extended emission line halos around high redshift radio galaxies--but without the strong radio emission-- Lya nebulae (or Lya 'blobs') boast copious Lya emission (10^44 erg s -1 ...

The George Pólya Award, established in 1976, is named after the renowned teacher and writer, and is given for articles of expository excellence published in the College Mathematics Journal. This is an award of $500. Up to two of these awards are given annually at the Summer Meeting of the Association.

(2) The lack of damped Lya or obvious Lya forest implies z < 3.9. (3) The lack of obvious Mg II absorption implies z < 1.1. Further analysis is in progress. ...

The Probability Distribution of the Flux in the Lya Forest Vincent Desjacques Hebrew University, Jerusalem Abstract: I will present a measurement of the probability distribution...

, E. (2001). Neither Sherlock Holmes nor Babylon: A reassessment of Plimpton 322, Historia Mathematica

We establish comparison theorems for eigenvalues between higher order elliptic equations on compact manifolds with boundary. As an application, it follows that if the P�lya conjecture is true then so is the generalized P�lya conjecture proposed by Ku et al. (J Differ Equ 97:127-139, 1992). We also obtain new lower bound for the eigenvalues of higher ...

The P�lya process is an urn scheme arising in the context of contagion spreading. It exhibits unstable persistence effects. The Friedman urn process is dual to the P�lya one with antipersistent stabilizing effects. It appears in a safety campaign problem. A P�lya-Friedman urn process is investigated with a tuning persistence ...

There are different macrophage- and granulocyte-inducing (MGI) proteins. Normal myeloid precursors are induced to multiply by one form (MGI-1) and to differentiate by another form (MGI-2). There are clones of myeloid leukemia cells that no longer require MGI-1 for growth but can still be induced to differentiate by ...

Procyon Si XIII Hea Mg XII Lya Mg XI Hea Ne X Lya Ne IX Hea Fe XVII Fe XVIII Fe XVII O VIII Lya O VII Hea # 7 MK. Procyon (F5 IV�V), Tpeak # 1-2 MK. Note the di#erent continua and line systems. 2. Coronal to Chandra�LETGS X�ray observations of Capella and Procyon. A&A 367, 282--296. Ness, J.�U., Schmitt, J. H. M

SUSIM hUARS continues to make Ly-a (121.6 nm) mesurements. ... Battery temperatures are stable with a temperature delta between Battery 2 and Battery 3 of ...

Shock compression ratio & Mach number: UVCS can measure the density ratio and the adiabatic proton temperature ratio (Lya), .... What are the physical processes that control the heating and acceleration of fast ...

2005 Constructing the experiment: ZEN � Z Equals Nine NB observations select Lya emitting galaxies anecdote or a riddle that has no solution; used in Zen Buddhism to show the inadequacy of logical

performed with a microwave-discharge hydrogen-flow lamp pro- ducing primarily Lya photons (10.2 eV, 121.6 nm, and. ...

/or the applications of mathematics, and lecturing gifts. The award is in memory of Dr V.D. Naylor. The winner Prize, up to four Whitehead Prizes and the Naylor Prize and Lectureship in Applied Mathematics. Brief Morgan Medal, P�lya Prize, Senior Berwick Prize or the Naylor Prize. Recent winners include B�la Bollob�s

The GALEX (Galaxy Evolution Explorer) spectroscopic survey mode, with a resolution of about 8 A in the FUV (1350 - 1750 A) and about 20 A in the NUV (1950 - 2750 A) is used for a systematic search of Ly-a emitting galaxies at low redshift. This aims at filling a gap between high-redshift surveys and a small set of objects studied in detail in the nearby universe. A blind ...

Lyman-alpha {Lya} is intrinsically the strongest recombination line in HII nebulae, reprocessing around 1/3 of the ionizing energy. This fact, combined with a rest wavelength that makes it convenient for high redshift studies have made Lya the dominant spectral probe of galaxy formation and evolution in the distant universe. At the same time, our ...

We present Keck spectroscopic observations of z>6 Lyman-break galaxy (LBG) candidates in the Subaru Deep Field (SDF). The candidates were selected as i'-dropout objects down to z'=27 AB magnitudes from an ultra-deep SDF z'-band image. With the Keck spectroscopy we identified 19 LBGs with prominent Lya emission lines at 6

H-like OvnI. Ly/_, OvlIl. Lya, NVll Lyc_ and C vI Lya line emission. Our model includes a power-law continuum, with cold absorption fixed at the Galactic ...

We have shown previously that mutations in nuclear genes, termed MGI, for mitochondrial genome integrity, can convert the petite-negative yeast Kluyveromyces lactis into a petite-positive form with the ability to produce mitochondrial genome deletion mutants (Chen and Clark-Walker, Genetics, 133, 517-525, 1993). Here we describe that two genes, MGI2 and ...

The recurrence properties of random walks can be characterized by P�lya number, i.e., the probability that the walker has returned to the origin at least once. In this paper, we consider recurrence properties for a general 1D random walk on a line, in which at each time step the walker can move to the left or right with probabilities l and r, or remain at the same position ...

Generalized probability distributions for Maxwell-Boltzmann, Bose-Einstein and Fermi-Dirac statistics, with unequal source (�prior�) probabilities q for each level i, are obtained by combinatorial reasoning. For equiprobable degenerate sublevels, these reduce to those given by Brillouin in 1930, more commonly given as a statistical weight for each statistic. These distributions and ...

A brain weight deficit of about 70 mg was induced at doses of approximately 75-mGy and a deficit of 60 mg was induced at 100 mGy. This confirms the effects projected and observed by Wanner and Edwards. Although the data do not demonstrate a clear dose-res...

... band stage. Functional classification is based on Gene Ontology (MGI/NCBI/AmiGo). Table 1. Continued. Table 1. ... band stage. Functional classification is based on Gene Ontology (MGI/NCBI/AmiGo). Th...

The results of a study to determine the technical and economic feasibility of constructing and operating a fuel grade ethanol plant in Talladega County, Alabama are presented. The conceptual design of the plant is included. The site for the proposed plant...

The work is an initial attempt to evaluate 20 selected remote sensor types for their ability to obtain data on specific natural and culutral terrain components (81 selected MGI elements). The evaluations were made at three levels according to the complexi...

Thermoluminescent dosimetry studies were performed on a Rando Humanoid head phantom to compare radiation dosages used in temporomandibular joint examinations. Studies included transaxial and direct sagittal high-resolution CT, reduced milliamperage dynamic CT, tomoarthrography, pluridirectional and linear tomography, pantomography, transcranial plain films, and fluoroscopy. Radiation doses were ...

The purpose of this study was to assess the feasibility of construction and operation of a 40 to 80 million gallon per year (MGY) fuel alcohol production plant at a site along the Coosa River in Talladega County, Alabama, about 50 miles from Birmingham. T...

A market survey was conducted to determine the supply and demand characteristics of the feedstocks, products, and by-products for a proposed 40-MGY fuel alcohol plant near Childersburg, Alabama. The scope of work for the market analysis encompassed the fo...

The combination of Pioneer photometric and Voyager spectrometric observations of EUV interstellar-interplanetary emissions in the region beyond 5 A was applied to a determination of atomic hydrogen and helium densities. These density estimates obtained fr...

WITH GODDARD HIGH RESOLUTION SPECTROGRAPH Lya SPECTRA TOWARD a CENTAURI K. G. G. P. AND H. L. GAYLEY of the LISM feature, and similarly for the alpha Cen hydrogen wall at the blue edge, so that the two sides

The results of theoretical analysis of charged particle movement in the accompaniment system containing superconducting magnet elements are presented. Criteria and conditions leading to the longitudinal and transverse beam stability are defined on the Lya...

A comprehensive program was undertaken to design and develop a mechanical repair fitting that can be installed under live blowing gas conditions to serve as a permanent repair option. Through an iterative design and development approach, GTI and R. W. Lya...

... Th~et;icks were stored singly in jars at aj lya!.id average temperature of 230 C. The fo~llowing experiments were ... tohv e osti-'o;teo ivle a o infected. ...

Yermolayev, V. G. : Vysokiye zvuki i zvukovaya travma [High-Ptich Sounds. 4. Iordanskaya, Ye. N. : 2Lya nauchnaya konf. PO voprosam fiziologii truda ...

the sample mean corresponding to n Bernoulli trials. Thus, by the law of large numbers, Mn convergesVirtual Laboratories > 12. Finite Sampling Models > 1 2 3 4 5 6 7 8 9 8. P�lya's Urn and the Beta-Bernoulli model (sampling without replacement) and the Bernoulli model (sampling with replacement). The beta

Redshifted light from early stars from z ~ 10 contributes to the cosmic near infrared background. We present detailed calculations of their spectrum with assumptions about metallicity and mass spectrum. We show that if the near infrared background has a stellar origin, metal-free stars are not the only explanation of the excess near infrared background; stars with metals (e.g. Z = 1/50Z[Special ...

The School of Mathematics and Statistics at the University of St. Andrews in Scotland presents this comprehensive presentation on the works and life of George P�³lya as part of their larger Mathematical Genealogy Project. Visitors can read a full biography in the MacTutor biography section as well as peruse quotations, select excerpts of his works, and consider those ...

The patch-clamp technique was used to investigate the effect of intracellular Mg2+ (Mgi2+) on the conductance of the large-conductance, Ca(2+)-activated K+ channel in cultured rat skeletal muscle. Measurements of single-channel current amplitudes indicated that Mgi2+ decreased the K+ currents in a concentration-dependent manner. Increasing ...

The threshold values of total absorbed dose for causing changes in tensile properties of a polyetherimide film and the limitations of the absorbed dose rate for accelerated-exposure evaluation of the effects of electron radiation in geosynchronous orbit were studied. Total absorbed doses from 1 kGy to 100 MGy and absorbed dose rates from 0.01 MGy/hr to 100 ...

Marine Crenarchaeota Group I (MGI) is a ubiquitous and numerically predominant microbial population in marine environments. Understanding of the spatial dynamics of MGI and its controlling mechanisms is essential for understanding of the role of MGI in energy and element cycling in the ocean. In the present study, we investigated the ...

Prostaglandin E1 and the beta-adrenergic hormone l-isoproterenol stimulated cyclic AMP formation in both nucleated and enucleated myeloid leukemic cells that could be induced to differentiate normally to mature cells by the macrophage- and granulocyte-inducing protein MGI (MGI+D+ cells). Enucleated as well as nucleated MGI+D+ cells ...

Radiation absorbed doses from radiography of the paranasal sinuses and the facial skeleton were measured with thermoluminescent dosimeters (TLD) on a phantom head using high-sensitivity screens in an Orbix stand. The entrance doses to the skin of the head ranged from 0.31 to 2.9 mGy per exposure. The absorbed dose from a full series of sinus exposures averaged 0.33 ...

Radiation absorbed doses from radiography of the paranasal sinuses and the facial skeleton were measured with thermoluminescent dosimeters (TLD) on a phantom head using high-sensitivity screens in an Orbix stand. The entrance doses to the skin of the head ranged from 0.31 to 2.9 mGy per exposure. The absorbed dose from a full series of sinus exposures averaged 0.33 ...

The atomic bombs in Hiroshima and Nagasaki led to two different types of radiation exposure; one was direct and brief and the other was indirect and persistent. The latter (so-called exposure to residual radiation) resulted from the presence of neutron activation products in the soil, or from fission products present in the fallout. Compared with the doses from direct exposures, estimations of ...

Growth and differentiation of normal myeloid haematopoietic cells are regulated by a family of macrophage- and granulocyte-inducing (MGI) proteins. Some of these proteins (MGI-1) induce cell growth and others (MGI-2) induce cell differentiation. Addition of MGI-1 to normal myeloid cells induces growth and also ...

This study evaluated radiation dose and dose reduction in CT imaging for acute stroke. Radiation doses in three types of CT imaging (i.e. non-contrast-enhanced CT, CT perfusion (CTP) and CT angiography (CTA)) were measured with an in-phantom dosimetry system for 4-, 16- and 64-detector CT scanners in 5 hospitals. To examine the relationship between image quality and radiation dose in CTA, image ...

When normal human fibroblast cells (MRC-5) received a priming irradiation of 3-20 mGy 4 h prior to irradiation with 1000 mGy, the number of DNA double-stranded breaks (DSBs) decreased significantly to 18.2-18.7 per cell compared with 21 per cell when there was no priming irradiation. This result indicates that a priming irradiation of 3-20 ...

The aim of this study was to evaluate the impact of low internal exposure to 137Cs on L. sativum meristem cells and Tradescantia stamen hair cells. It also compared the impact of 137Cs internal and external irradiation of similar level on the plant seed germination and root growth. Compared to control, the tested internal (0.0007 mGy to 0.7 mGy) and ...

This work aimed at assessing the doses delivered in Switzerland to paediatric patients during computed tomography (CT) examinations of the brain, chest and abdomen, and at establishing diagnostic reference levels (DRLs) for various age groups. Forms were sent to the ten centres performing CT on children, addressing the demographics, the indication and the scanning parameters: number of series, ...

Radiation dose was recorded for 68 patients undergoing urography with nephrotomography using rare-earth screen-film combinations. Correlation of patient data with both Alderson and Presswood phantoms (10-30 cm) was obtained. Doses were calculated on the basis of an 11-exposure urogram. The patient population thickness was 15-31 cm. Surface doses were 1.58 rad (15.8 mGy) to ...

Radiation dose was recorded for 68 patients undergoing urography with nephrotomography using rare-earth screen-film combinations. Correlation of patient data with both Alderson and Presswood Phantoms (10-39 cm) was obtained. Doses were calculated on the basis of an 11-exposure urogram. The patient population thickness was 15-31 cm. Surface doses were 1.58 rad (15.8 mGy) to ...

... 32. Increasing temperature will increase the Henry's law constant of ... was only 0.601 mg/I and was insufficient to provide the phosphorus needed for ...

... Page 32. The MiZCtarLy Gecraph-c Infolimation (MGI) Subsystem to be the jstore house and center for analysis and synthesis for the terrain aspects ...

... 5-6 Alkalinity, mgiKOH/g 55-60 ... alkalinity indicated that its functional properties are significantly improved with an increase in alkalinity. ...

Massive gas injection (MGI) has been shown to significantly reduce both the heat loads and forces transmitted to the tokamak first wall. However, MGI has been unable to approach the ne required to prevent runaway electron (RE) generation by the avalanche process. Large shattered pellet injection (SPI) has been developed to overcome this limitation in ...

... Accession Number : ADA526670. Title : On the Doppler Shift and Asymmetry of Stokes Profiles of Photospheric FeI and Chromospheric MgI Lines. ...

Solar water heaters. Reformers for fuel cell power systems. Compact energy and process systems. Contact: Mike Izenson, mgi@creare.com. Inhabited ...

Past and ongoing disruption mitigation studies in DIII-D employing massive gas injection (MGI) are reviewed and compared with theoretical expectations. Emphasis in the review will be placed on 1) the gas hydrodynamic delivery considerations that determine the rate of impurity and electron delivery to the plasma edge, 2) the role of MHD instability and internal reconnection in ...

Apr 21, 2011 ... Table showing the measured dose, in terms of kerma in air (mGy), for the Institute of Nuclear Physics (INP) TLDs flown as part of the NTDP ...

... Individual sheets may be torn in quarters and ... MGI/MGD Military Geographic Information/Military Geographic ... MSDS Mission Specific Data Set ...

Quantum vortices are investigated in the framework of the quantum Hamilton-Jacobi formalism. A quantum vortex forms around a node in the wave function in the complex space, and the quantized circulation integral originates from the discontinuity in the real part of the complex action. Although the quantum momentum field displays hyperbolic flow around a node, the corresponding ...

The Far-Ultraviolet Off-Rowland Telescope for Imaging and Spectroscopy (FORTIS) is a rocket-borne spectro-telescope designed to investigate Lyman alpha (Lya) escape from nearby star-forming galaxies and to quantify its relationship to the local gas-to-dust ratio. By operating in the 900 - 1700 Angstrom bandpass and incorporating a GSFC microshutter array at the prime focus, ...

The flight calibration of the spectral response of CCD instruments below 1.5 keV is difficult in general because of the lack of strong lines in the on-board calibration sources typically available. We have been using E0102, the brightest supernova remnant in the Small Magellanic Cloud, to evaluate the response models of the ACIS CCDs on the Chandra X-ray Observatory (CXO), the EPIC CCDs on the ...

H I LYMAN -ALPHA (LY-A) IS ONE OF THE MOST IMPORTANT LINES EMITTED BY PLASMA IN THE TEMPERATURE RANGE OF 7000 TO 10 TO THE FIFTH POWER K IN LATE-TYPE STARS. IT IS A MAJOR COMPONENT OF THE TOTAL RADIATIVE LOSS RATE, AND IT PLAYS A CRUCIAL ROLE IN DETERMINING THE ATMOSPHERIC STRUCTURE AND IN FLUORESCING OTHER UV LINES. YET IT IS ALSO THE LEAST STUDIED MAJOR LINE IN THE FAR UV, ...

was published. � An additional 207 MGY of production capacity has been added via plant expansions completed since the original survey. � Construction has begun on eight new plants, with a total production capacity of 217 MGY, since the original survey. � Six additional ethanol plants, with a total production

Our previous study suggested that the DNA double-strand breaks (DSBs) induced by very low X-ray doses are largely due to bystander effects. The aim of this study was to verify whether DSBs created by radiation-induced bystander effects are likely to be repaired. We examined the generation of DSBs in cells by enumeration of phosphorylated ataxia telangiectasia mutated (ATM) foci, which are ...

define the shapes of the cumulative lung cancer incidence curves that may arise when dose and dose rate bound is set at 225 mGy (3 mGy yr-1). Figure 3. Contribution to cumulative lung cancer incidence of DNA in the i as a function of dose rate and for changes in the radical scavenging capacity of a cell

Cancer Cancer Therapy Therapy No. patients No. patients Mean bone marrow Mean bone marrow dose ( dose ( mGy mGy ) ) All All leukemias leukemias No. cases No. cases SIR SIR Non Non - - CLL CLL No. cases No.

Electron beam intraoperative radiotherapy (ELIOT) is a new technique permitting breast radiotherapy to be completed in a single session. Since ELIOT is associated with much reduced irradiation to nontarget tissues, we carried out a study on nonpregnant breast cancer patients to estimate doses to the uterus during ELIOT to better evaluate the possible use of ELIOT in pregnant breast cancer ...

The results of a study to determine the technical and economic feasibility of constructing and operating a 40 to 80 million gallon per year alcohol fuels plant in Talladega County, Alabama are presented. This volume briefly outlines the transformation of ...

The environmental health, safety, and socioeconomic assessment for the proposed ethanol plant has been thoroughly analyzed. In general, there will be no long-term adverse effects to the environment from either the construction or the operation of the plan...

The purpose of this study was to assess the feasibility of construction and operation of a 40 to 80 million gallon per year (MHY) fuel alcohol production plant at a site along the Coosa River in Talladega County, Alabama, about 50 miles from Birmingham. T...

Hartree-Fock calculations have been performed for the auto-ionizing levels of the 3pns, 3pnp, 4snp (n=4 to 7) and 3pnd (n=3 to 7) series in MgI. The calculated energies of the auto-ionizing states are compared with the available results from photo-absorpt...

The objective of the 3rd International Intercomparison on Electron Paramagnetic Resonance (EPR) Tooth Dosimetry was the evaluation of laboratories performing tooth enamel dosimetry below 300 mGy. Participants had to reconstruct the absorbed dose in tooth enamel from 11 molars, which were cut into two halves. One half of each tooth was irradiated in a 60Co beam to doses in the ...

A brain weight deficit of about 70 mg was induced at doses of approximately 75-mGy and a deficit of 60 mg was induced at 100 mGy. This confirms the effects projected and observed by Wanner and Edwards. Although the data do not demonstrate a clear dose-response relationship between the 75-mGy and 100-mGy groups, the ...

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more than have of the observed flux in the F122M filter is found to be redleak. Internal Contamination a new source of contamination is introduced during future servicing missions. 1. Introduction Analysis of polymerized contaminants ~450� thick which reduced the Ly�a reflectivity to less than 1% of its pre

and L.Ya. Yukelson, Biochim. Biophys. Acta. 342, 275- 280 (1974). 33. T.L. Bushueva, E.P. Busel, V.P. Busel and E.A. Burstein, Studia Biophys. 52, 41-52 (1975). 42. K. Willaert and Y. Engelborghs, Eur

The modification of the stroboscopic (mu)SR technique is considered. This modification uses the peculiarity of the time structure of the JINR phasotron beam. In the proposed method the external magnetic field has a constant value, unlike the usual strobos...

The combination of Pioneer photometric and Voyager spectrometric observations of EUV interstellar-interplanetary emissions in the region beyond 5 AU have been applied to a determination of atomic hydrogen and helium densities. We have combined the spacecr...

The Hilbert-P�lya conjecture states that the imaginary parts of the zeros of the Riemann zeta function are eigenvalues of a quantum Hamiltonian. If so, conjectures by Katz and Sarnak put this Hamiltonian in the Altland-Zirnbauer universality class C. This implies that the system must have a nonclassical two-valued degree of freedom. In such a system, the dominant primitive ...

How and when galaxies formed are questions at the forefront of work in observational cosmology. While the baryonic content of galaxies observed in the present epoch is concentrated in stars, in the past this must have been in the form of gas. Damped \\lya absorption systems (N(HI)>= 2 times 10(20) cm(-2) ) dominate the baryonic mass contributed by HI. The APM Damped ...

-loop system. With fluid drag still neglected and ud = 0, the closed- loop equations (3.3) describe Hamiltonian- tors to globally stabilize steady translation of an un- derwater vehicle that is subject to fluid drag to the motion of interest. The Lya- punov function must be suitably modified in the second step since fluid drag

... cil0 -ra' zwuL (AmL3 to 2.0 -m-onths)).* th saTno tiiaý in'uonti'ol Ytvky, inl w~i~ ~i ctii~ .t ... thu ~ t& thv rodi'unal lya.3i.h nodes. 3est AvaiInhi, Page 6. ...

High redshift radio galaxies are great cosmological tools for pinpointing the most massive objects in the early Universe: massive forming galaxies, active super-massive black holes and proto-clusters. We report on deep narrow-band imaging and spectroscopi...

We compare International Ultraviolet Explorer (IUE) spectral observations of Jupiter's UltraViolet (UV) aurora in H-Lyman alpha (H-Lya) and H2 emissions with images of the UV aurora with HST to make more realistic interpretations of the IUE dataset. Use t...

, 1971); 3) myelin (Gal- lyas, 1979); or 4) staining for Nissl substance with thionin. In most brains in sections stained for Nissl substance (N), myelinated fibers (MF), and acetylcholinesterase (ACh) to the core. Myeloarchitecture In coronal sections stained for myelin, the auditory cor- tex of all three

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High resolution spectroscopy of high redshift quasar spectra enables us to investigate the properties of the intergalactic medium (IGM) and measure cosmological parameters from the Lya forest. Toward high precision cosmology, this dissertation presents the following four topics. (1) Principal Component Analysis (PCA) on quasar spectrum: We introduce the PCA to describe quasar ...

It was the aim of the study presented here to estimate for the first time patient dose levels in conventional diagnostic radiology in Montenegro. Measurements of patient dose in terms of entrance surface air kerma (ESAK) and kerma-area product (KAP) were performed on at least 10 patients for each examination type, in each of five randomly selected health institutions in Montenegro, so that a total ...

Since 1967 at the times of their biennial ABCC/RERF radiological examinations, all Adult Health Study (AHS) subjects have been interviewed to determine the exposures to medical x-rays they experienced in institutions other than RERF in order to estimate the numbers of examinations and corresponding doses which they received. These data have been stored on computer tapes together with the doses ...

The use of diagnostic reference levels (DRLs) is part of the optimisation process of radiation protection, in that it identifies practices that are in need of corrective action, resulting in dose reduction. Their use is provided for in Irish and European legislation. In this project, measurements were carried out at 42 of the 46 licensed intra-oral xray machines in Co. Wicklow using an Unfors ...

The effect of x rays on brain weight of guinea pig pups at birth was studied for 21-day old embroys exposed in utero to doses of 75 and 100 mGy. When compared to controls and when corrected for body weight, gestation time, litter size, sex, and examiner differences the brains of irradiated pups weighed approximately 46 mg less than those of controls (p<0.001) for the ...

The effect of x rays on brain weight of guinea pig pups at birth was studied for 21-day old embroys exposed in utero to doses of 75 and 100 mGy. When compared to controls and when corrected for body weight, gestation time, litter size, sex, and examiner differences the brains of irradiated pups weighed approximately 46 mg less than those of controls (p<0.001) for the ...

The purpose of this study is to measure the environmental radiation exposure in and surrounding the room of patients treated with (131)I. Absorbed dose rates were measured using thermoluminescence dosemeters, type TLD-200 (CaF(2):Dy), in a continuous monitoring programme. It is found that the estimated annual shallow and deep dose rates are 226 and 175 mGy at the patient bed; ...

The line narrowing of excimer lasers is discussed. The theory for an optical two-effect intracavity line narrowing device, the multipass grating interferometer (MGI), is presented. An MGI contains a grating aligned in its second-order Littrow configuration and a mirror aligned parallel to the grating surface reflecting back the beam normal to the grating ...

A market survey was conducted to determine the supply and demand characteristics of the feedstocks, products, and by-products for a proposed 40-MGY fuel alcohol plant near Childersburg, Alabama. The scope of work for the market analysis encompassed the following areas: market evaluation of feedstocks considering availability, price, and acquisition methods over the life of the ...

Dechorionated zebrafish embryos were irradiated at 1.5 h post fertilization (hpf) to low-doses of alpha particles, viz., 1.4, 2.8, 5.6, 11.2 mGy (determined using Monte Carlo simulations). At 24 hpf, these embryos were then examined for apoptotic cells through acridine orange staining. The mean number of apoptotic cells was found to decrease significantly from controls to ...

The alpha dose to cells in bronchial airways in the beagle dog during historical exposures to {sup 222}Rn decay products is calculated using updated information on airway morphometry, call nucleus depth, mucus thickness, physical dosimetry and atmospheric characteristics. The alpha dose per unit exposure to basal call nuclei in the upper airways ranges from 2 to 7 mGy WLM{sup ...

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The alpha dose to cells in bronchial airways in the beagle dog during historical exposures to [sup 222]Rn decay products is calculated using updated information on airway morphometry, call nucleus depth, mucus thickness, physical dosimetry and atmospheric characteristics. The alpha dose per unit exposure to basal call nuclei in the upper airways ranges from 2 to 7 mGy WLM[sup ...

... LC 5 0 FC-203 FC-203A Fathead minnow (Pimephales promelas) 750 mg/l 300 mg/i ... Fish 96-Hr. LC 5 0 Fathead minnow (Pimephales promelas) ...

... CH, COOEt 1. CH3MgI CH3 COOEt 3. Saponification BC 2. Hydrolysis^ nE c __ CH K Decarboxylation^ CH / "\\ 3 T / COOEt CH, COOEt t � i .... 1 ! o ...

... shiners, 6 Page 30. ... studies. Accelerated rates of hatching were found in rainbow trout eggs exposed to 0.5 mg/l to 4.0 mg/i and growth ...

Computed tomography is one of the most popular medical imaging modalities used in the last years. However, because is one of the techniques that delivered a considerable radiation dose, precautions should be taken into account. Pediatric patients are more radiosensitive than adults, and the probability that no desirable biological effects can occur is greater. To this, also it adds the probability ...

Computed tomography is one of the most popular medical imaging modalities used in the last years. However, because is one of the techniques that delivered a considerable radiation dose, precautions should be taken into account. Pediatric patients are more radiosensitive than adults, and the probability that no desirable biological effects can occur is greater. To this, also it adds the probability ...

The Brazilian natural pink tourmaline is studied through the polarized optical absorption measurements. The effect of increasing doses of gamma -rays from sup 60 Co in the spectra were determined (maximum of 20MGy). The following optical absorption bands ...

Endoscopic retrograde cholangiopancreatography (ERCP) procedure is an invasive technique that requires fluoroscopic and radiographic exposure. The purpose of this study was to determine the occupational dose of ionising radiation at three gastroenterology departments (Fedial, Soba and Ibn seena hospitals) in Khartoum, Sudan. The radiation dose was measured during 55 therapeutic ERCP procedures. ...

For cosmic environment consists of a varying kinds of radiation particles including high Z and energy ions which was charactered with low-dose and high RBE, it is important to determine the possible biofuctions of high LET radiation on human beings. To analyse the possible effectes of mutational influences of low-dose and high-LET ionizing radiation, wild fruit flies drosophila melanogaster were ...

Using the near-infrared spectral stellar library of Cenarro et al. (J/MNRAS/326/959), the behaviour of the MgI line at 8807� and nearby TiO bands is analyzed in terms of the effective temperature, surface gravity and metallicity of the library stars. New spectroscopic indices for both spectral features - namely MgI and sTiO - are defined, and their ...

Radiation measurements of surface and deep organ doses were performed aboard the International Space Station, for the period of January 2006 to April 2007, using a MOSFET dosimetry system combined with the Matroshka-R spherical phantom. The averaged internal and surface dose rates are found to be 0.19 and 0.29 mGy d(-1), respectively. The levels of radiation dose to ...

... of a few potential confounding variables available from questionnaire data have not shown significant changes in risk ... of the order of several mGy, while many patients receive multiple scans. For examp...

... radiocollars. We extracted distress and alarm calls using Video Wave III SE software (MGI Software Corp., Richmond Hill, Ont.), and copied ... ...

Patient dose measurements of local entrance dose to the skin have been carried out using radiochromic film (Gafchromic XR-RV2) in a sample of interventional procedures. The major aim of the work was to measure patient entrance dose from such examinations using Gafchromic XR-RV2. Forty-five various interventional procedures (including nefrostomies and urinary stenting, biliary stenting and ...

Injection of massive quantities of gas is a promising technique for fast shutdown of ITER for the purpose of avoiding divertor and first wall damage from disruptions. Previous experiments using massive gas injection (MGI) to terminate discharges in the DI...

The results of the evaluation of TLD chips are received in nC, and we need to transform these values to mGy, in order to obtain the penetrating and the non-penetrating dose. The calibration factors were determined experimentally by irradiation the TLD chi...

Over the past few years the University of Rhode Island (URI), Marine Geomechanics Laboratory and the Maguire Group Inc., (MGI) have gathered significant data and conducted tests relative to beneficial use of dredge materials from the Quonset Point/Davisvi...

... Abstract : The effects of electron radiation on Ultem, a ... were studied for total absorbed doses from 1.0 kGy to 100 MGy at absorbed dose rates from ...

The purpose of this work is to compare the state of a representative number of mammography systems in Bulgaria in terms of incident air kerma (IAK) and film optical density (OD) and to propose the optimisation measures where appropriate. IAK with a standard phantom and OD of the exposed films were measured on 22 % of all units in the country. IAK values ranged from 2 to 24.3 ...

... from videotapes using a Dell personal computer and video media software (VideoWave III; MGI Software Corporation, Sonic Solutions, Novato, CA). Video media capabilities allowed us to perform more discrimin...

Test transistors and a complete mixed signal integrated circuit, fabricated in the Harris AVLSI-RA process, have been irradiated and shown to function well at total doses greater than 100 Mrad (1 MGy). Results are presented.

Scintimammography is sometimes referred as a complementary diagnostic method to X-rays mammography and is the optimum examination for some patients to check suspected breast tumors. A dosimetric comparison of these diagnostic examinations is important. Estimation of the absorbed dose was achieved by calculations of internal dosimetry by Medical Internal Radiation Dose (MIRD) models and by ...

Created by the Jackson Laboratory as part of Mouse Genome Informatics, this website features Mammalian Orthology and Comparative Maps. At this site, searches can be made in the area of Mammalian Orthology by species, gene symbol, name, or map position. Site visitors can also build comparative maps, retrieve an Oxford Grid to display a two-species orthology comparison, and view orthologies between ...

Single crystals of magnesium diiodide have been grown and the structure solved for the first time from single-crystal X-ray diffraction data. This study confirms that MgI(2) is isostructural with CdI(2) (C6 or 2H structure type). The space group is P-3m1 with the Mg atom on a site with 3m symmetry (Wyckoff site 1a) and the I atom on a site with m symmetry (Wyckoff site 2d). ...

Non-viral gene delivery systems based on cationic polymers have faced limitations related to their relative low gene transfer efficiency, cytotoxicity and system instability in�vivo. In this paper, a flexible and pompon-like dendrimer composed of poly (amidoamine) (PAMAM) G4.0 as the inner core and poly (L-glutamic acid) grafted low-molecular-weight polyethylenimine (PLGE) as the surrounding ...

Non-viral gene delivery systems based on cationic polymers have faced limitations related to their relative low gene transfer efficiency, cytotoxicity and system instability in vivo. In this paper, a flexible and pompon-like dendrimer composed of poly (amidoamine) (PAMAM) G4.0 as the inner core and poly (L-glutamic acid) grafted low-molecular-weight polyethylenimine (PLGE) as the surrounding ...

The effects of electron radiation on a polyetherimide (PEI), Ultem^{cdot}, were investigated. In particular, the changes in the glass transition temperature (T_{g} ) with absorbed radiation dose were studied. The polymer was exposed to mono-energetic beams of 100-keV electrons and 1.0-MeV electrons for doses up to 100 megagray (MGy). Dosimetry for the exposures was based on ...

In order to investigate the biological effects of galactic rays on astronaut cerebral functions after space flight, mice were exposed to different heavy ions (HZE) in whole-body conditions at doses comparable to the galactic flux: 12C, 16O and 20Ne (95 MeV/u, at 42-76 mGy). Animals were also exposed to 42 mGy of 60Co radiation for comparison with HZE. The ...

Mice heterozygous for Trp53 are radiation-sensitive and cancer-prone, spontaneously developing a variety of cancer types. Osteosarcomas in the spine lead to paralysis, while lymphomas lead rapidly to death, distinct events that provide objective measures of latency. The effects of a single low-dose (10 or 100 mGy), low-dose-rate (0.5 mGy/min) (60)Co gamma irradiation on ...

A major challenge for functional and comparative genomics resource development is the extraction of data from the biomedical literature. Although text mining for biological data is an active research field, few applications have been integrated into production literature curation systems such as those of the model organism databases (MODs). Not only are most available biological natural language ...

Objective: The aim of this human study was to evaluate the radiation doses in the buccal cavity and face, during panoramic, spiral conventional tomography, and helicoidal computerized tomography exams. Material and Methods: Lithium fluoride TL detectors (TLD-100) were placed on the skin at anatomic points such as parotid glands, submandibular glands, thyroid glands, and crystalline to assess the ...

We analyze optical-near infrared spectra of a large sample of quasars at high redshift with the aim of investigating both the cosmic reionization history at z ~ 6 and the properties of dust extinction at z > 4. In order to constrain cosmic reionization, we study the transmitted flux in the region blueward the Lya emission line in a sample of 17 quasars spectra at 5.7 <= ...

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The local Riemann hypothesis states that the zeros of the Mellin transform of a harmonic-oscillator eigenfunction (on a real or p-adic configuration space) have a real part 1/2. For the real case, we show that the imaginary parts of these zeros are the eigenvalues of the Berry�Keating Hamiltonian \\hat{H}_BK=(\\hat{x}\\hat{p}+\\hat{p}\\hat{x})/2 projected onto the subspace of oscillator ...

from comets C/1973 E1 (Kohoutek;A Huppler et al. 1975; Scherb 1981), 1P/1982 U1 (Halley; 1 Department Kohoutek Lya data. High spectral resolution Ha measurements have con�rmed the predominance of the 8 km s~1, there are earlier studies of comets with much smaller col- lisional regions, namely, Kohoutek (Meier et al. 1976

We use numerical simulations to probe the warm-hot gas halo that is predicted to surround normal disk galaxies, suggesting the term "Circumgalactic Medium" for such gas. We focus on gas accretion and outflows using high-resolution cosmological simulations. The output of these simulations is used to predict a variety of observational signatures including X-ray emission and UV absorption/emission ...

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Derived quantities fesc (Ly? escape fraction), fesccont (escape fraction of continuum radiation close to Ly?), and Ly? equivalent width for a constant input spectrum (flat continuum) as a function of the 4 model parameters vexp (expansion velocity), NHI (HI column density), b (HI velocity dispersion), tau_a (dust absorption optical depth). The derived quantities have been computed for all 6240 ...

@eso.org). .............................................................. A `checkerboard' electronic crystal state in lightly hole-doped Ca22xNaxCuO2Cl2 T. Hanaguri1,2 , C. Lupien3 , Y correlations of a four CuO2-unit-cell square `checkerboard', independent of energy. Intricate atomic spectrum (V-shaped without coherence peaks) associated with a `checkerboard' approximately four CuO2 unit

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Results are presented of radiometric determination of the mobility of the metallic components (radionuclides Co-60, Pr-141, Sm-153, and Eu-155) in sintered lanthanoid orthocobaltites, LnCoO/sub 3/. The samples underwent isothermal annealing and were synthesized by a ceramic technique in the air as proposed by A.Yu. Kropanev, A.N. Petrov, L.Ya. Rabinovich, and G.I. McCarthy. ...

High redshift radio galaxies are great cosmological tools for pinpointing the most massive objects in the early Universe: massive forming galaxies, active super-massive black holes and proto-clusters. They report on deep narrow-band imaging and spectroscopic observations of several z > 2 radio galaxy fields to investigate the nature of giant Ly-{alpha} nebulae centered on the galaxies and ...

The Very high Angular resolution ULtraviolet Telescope (VAULT) is an Lya spectroheliograph flown on a sounding rocket. The payload is capable of obtaining Lya filtergrams with a spatial resolution of around 0.33'' ( 200 km) over an extended field of view (535'' x 235'') . The instrument is tuned to the Ly-a line because it forms at the ...

We propose deep WFC3/IR imaging for a giant Lya emitter {LAE} with a Keck spectroscopic redshift of z=6.595 discovered by extensive narrow-band imaging with Subaru in the SXDS-UKIDSS/UDS field. This remarkable object is unique in many respects including its large stellar mass and luminous nebula which extends over 17 kpc; no equivalent source has been found in other surveys. ...

Trp53 heterozygous mice are radiation-sensitive and cancer-prone. Groups of 7-8-week-old female Trp53 heterozygous mice were exposed to 4 Gy of 60Co gamma radiation at high (0.5 Gy/min) or low (0.5 mGy/min) dose rate. Other groups received 10 or 100 mGy at low dose rate 24 h prior to the 4-Gy dose. Tumor frequency and latency were measured over the animals' life span. Exposure ...

Ionizing radiation (IR) induces a variety of DNA lesions among which DNA double-strand breaks (DSBs) are the biologically most significant. It is currently unclear if DSB repair is equally efficient after low and high doses. Here, we use ?-H2AX, phospho-ATM (pATM), and 53BP1 foci analysis to monitor DSB repair. We show, consistent with a previous study, that the kinetics of ?-H2AX and pATM foci ...

According to published data, the absorbed dose used for a CBCT image acquisition with Varian OBI v1.3 can be as high as 100 mGy. In 2008 Varian released a new OBI version (v1.4), which promised to reduce the imaging dose. In this study, absorbed doses used for CBCT image acquisitions with the default irradiation techniques of Varian OBI v1.3 and v1.4 are measured. TLDs are ...

Injection of massive quantities of gas is a promising technique for fast shutdown of ITER for the purpose of avoiding divertor and first wall damage from disruptions. Previous experiments using massive gas injection (MGI) to terminate discharges in the DIII-D tokamak have demonstrated rapid shutdown with reduced wall heating and halo currents (relative to natural disruptions) ...

Advances in laboratory animal imaging have provided new resources for noninvasive biomedical research. Among these technologies is microcomputed tomography (microCT) which is widely used to obtain high resolution anatomic images of small animals. Because microCT utilizes ionizing radiation for image formation, radiation exposure during imaging is a concern. The objective of this study was to ...

Advances in laboratory animal imaging have provided new resources for noninvasive biomedical research. Among these technologies is microcomputed tomography (microCT) which is widely used to obtain high resolution anatomic images of small animals. Because microCT utilizes ionizing radiation for image formation, radiation exposure during imaging is a concern. The objective of this study was to ...

Medullary gigantocellular reticular nucleus (mGi) neurons have been ascribed a variety of behaviors, many of which may fall under the concepts of either arousal or motivation. Despite this, many details of the connectivity of mGi neurons, particularly in reference to those neurons with ascending axons, remain unknown. To provide a neuroanatomical and ...

Retention of bile salts by the hepatocyte contributes to liver injury during cholestasis. Although cell injury can occur by one of two mechanisms, necrosis versus apoptosis, information is lacking regarding apoptosis as a mechanism of cell death by bile salts. Our aim was to determine if the bile salt glycodeoxycholate (GDC) induces apoptosis in rat hepatocytes. Morphologic assessment included ...

Radiation effects on molecular structure of polytetrafluoroethylene (PTFE) were studied by high-resolution solid-state 19F high speed magic angle spinning (HS MAS) NMR spectroscopy. Samples used for the NMR studies were prepared by electron beam irradiation of PTFE with a wide range of irradiation doses from 0.5-10 MGy in the molten state at 340 degC under oxygen-free ...

Purpose: The main purpose of this work was to compare peripheral doses absorbed during stereotactic treatment of a brain lesion delivered using different devices. These data were used to estimate the risk of stochastic effects.Methods: Treatment plans were created for an anthropomorphic phantom and delivered using a LINAC with stereotactic cones and a multileaf collimator, a ...

Radiation effects on cancer risks in a cohort of Taiwanese residents who received protracted low-dose-rate gamma-radiation exposures from (60)Co-contaminated reinforcing steel used to build their apartments were studied, and risks were compared to those in other radiation-exposed cohorts. Analyses were based on a more extended follow-up of the cohort population in which 117 cancer cases diagnosed ...

The method of electron spin resonance (ESR) dosimetry has been applied to human tooth enamel, to obtain individual absorbed doses of residents of settlements in vicinity of Ust-Kamenogorsk city, Kazakhstan (located about 400 km to the east from the epicenter of explosion at the Semipalatinsk Nuclear Test Site, SNTS). This region developed as a major mining and metallurgical center during the ...

Computed Tomography (CT) is a high dose X ray imaging procedure and its use has rapidly increased in the last two decades fueled by the development of helical CT. The aim of this study is to present values of the dosimetric quantities for CT paediatric examinations of thoracic and abdominal regions. The protocols studied were those of chest, lung-mediastine, chest-abdomen, pulmonary high ...

Background: Plasmodium falciparum causes severe clinical manifestations by sequestering parasitized red blood cells (PRBC) in the microvasculature of major organs such as the brain. This sequestration results from PRBC adherence to vascular endothelial cells via erythrocyte membrane protein 1, a variant parasite surface antigen.Objective: To determine whether P. falciparum multiple genotype ...

Recently the Brazilian health organisation published information conceming the number of hospitals, details of radiological equipment and frequency of medical examinations in the country. The information concerning the city of S�o Paulo is compiled here, complemented by a survey of absorbed doses to patients undergoing the most frequent examination: chest radiographs (postero-anterior (PA) and ...

BackgroundGiven the postulated advantages of mother generated index (MGI) in incorporating the patients' viewpoint and in the absence of a validated India specific postpartum quality of life assessment tool we proposed to evaluate the utility of an adapted Mother-Generated-Index in assessing postpartum quality of life (PQOL) in India.MethodsThe study was integrated into a ...

Spatial distributions of soil contamination by 137Cs (89 sampling points) and 239+240Pu (76 points) near and within Dolon village were analyzed. An essential exponential decrease of contamination was found in Dolon village: the distance of a half reduction in contamination is about 0.87-1.25 km (in a northwest-southeast direction from the supposed centerline of the radioactive trace). This fact is ...

The aim of this study was to evaluate the image quality of 29 computed tomography (CT) scanners in Brazil and to perform estimations of patient dose and image quality of common CT examinations at these equipment. The volume CT air kerma indexes (C(VOL)) were estimated, using normalised weighted air kerma indexes, supplied by the ImPACT group. The image quality tests were performed using the ...

We examined the phylogenetic diversity of microbial communities associated with marine basalts, using over 300 publicly available 16S rDNA sequences and new sequence data from basalt enrichment cultures. Phylogenetic analysis provided support for 11 monophyletic clades originating from ocean crust (sediment, basalt and gabbro). Seven of the ocean crust clades (OCC) are bacterial, while the ...

The optical transmission components of the future thermonuclear reactor will be expected to maintain their transmission properties under high levels of ionizing radiation for hundreds of hours. The degradation of the optical transmission properties of the candidate materials has to be studied to assess the lifetimes of such systems. KU1 quartz glass, known to be a radiation-resistant insulator ...

For the dose study, a semi-automated method of data collection is used in this study. The participating centres were asked to fill out a spreadsheet with all necessary data and return it. For direct digital (DR) systems, the relevant data available in the DICOM header were used. All data is automatically added to a database and processed. The data were used to calculate the mean glandular dose for ...

Dispersion of nanostructures within polymeric matrices affects their thermal properties and stability. Shifts, convolutions, and splitting of the main transitions (glass transition, melting transition, and crystallization temperature) were reported. In most cases, the thermal decomposition of the polymeric matrix is delayed or shifted towards higher temperatures. Nevertheless, little is known ...

A national study was performed to investigate radiation doses and associated risks to patients during X-ray fluoroscopy-guided small intestinal biopsies in the investigation of coeliac disease. Thermoluminescent dosemeters (TLD) and questionnaires were sent to 42 of the 43 paediatric departments in Sweden performing these biopsies. During the study period (2 x 3 weeks) 257 biopsies were recorded, ...

The luminescence of quartz extracted from recently fired building material is known to detect doses of few mGy and can be successfully employed in the case of large scale radiation exposures due to nuclear accidents or terrorist acts. One brick and two tiles (50-80 years range) collected from an urban settlement were used to test the realistic minimum detectable dose limits of ...

Maintenance tasks of the future International Experimental Thermonuclear fusion Reactor (ITER) will require communication links between the remotely operated equipment in the reactor vessel and the control room, some of which need to be radiation tolerant up to MGy dose levels. As a key element of opto-electronic transceivers, we therefore assessed the DC behavior of a ...

Gamma-ray measurements were carried out during a 4-week period in a household to determine the external dose to family members from a patient who was being treated for hyperthyroidism with the administration of 220 MBq of {sup 131}I. The measured doses in air were 0.08 and 0.09 mGy for the children and 0.49 mGy for the spouse. The doses delivered at ...

Gamma-ray measurements were carried out during a 4-week period in a household to determine the external dose to family members from a patient who was being treated for hyperthyroidism with the administration of 220 MBq of {sup 131}I. The measured doses in air were 0.08 and 0.09 mGy for the children and 0.49 mGy for the spouse. The doses delivered at ...

In the present work, we have studied the feasibility to use an experimental setup based on polyallyldiglycol-carbonate (PADC) films to study effects of alpha particles on dechorionated zebrafish embryos. Thin PADC films with a thickness of 16 ?m were prepared from commercially available CR-39 films by chemical etching and used as support substrates for holding zebrafish embryos for alpha-particle ...

LaGaO3 perovskites doped with Sr or Ba at the La site and Mg at the Ga site were prepared by solid-state reaction or sol-gel method and characterized. Enthalpies of formation from constituent oxides at 298K were determined by high-temperature oxide melt solution calorimetry. Energetic trends are discussed in terms of defect chemistry. As oxygen deficiency increases, formation enthalpies define ...

A computer routine was developed for automatic deconvolution of electron paramagnetic resonance spectra of tooth enamel samples for individual radiation dose reconstruction in the low dose region. The deconvolution routine uses the non-linear least square fit of a model simulating a tooth enamel spectrum by superposition of derivative Gaussian functions to obtain the amplitude of the dosimetric ...

The absorbed radiation dose to human organs has been estimated, following intravenous administration of (67)Ga-labelled adrenocorticotrophic hormone (ACTH) using distribution data from injected normal rats. Four rats were sacrificed at exact time intervals and the percentage of injected dose per gram of each organ was measured by direct counting from rat data. The Medical Internal Radiation Dose ...

The authors studied the mechanism for the decomposition of the perdeuteromethyl derivatives of a series of transition metals upon their formation. For this purpose, they investigated the composition of the gaseous products of the reaction of CD/sub 3/Li and CD/sub 3/MgI with the chlorides of Cr, Co, Ni, Ru, Rh, Pd, Re, Os, Pt, and W. The reactions were carried out at about ...

The Mouse Genome Sequencing Consortium and the RIKEN Genome Exploration Research grouphave generated large sets of sequence data representing the mouse genome and transcriptome, respectively. These data provide a valuable foundation for genomic research. The challenges for the informatics community are how to integrate these data with the ever-expanding knowledge about the roles of genes and ...

The purpose of this study is to evaluate and compare the performance of 52 full field digital (FFD) and computed radiography (CR) mammography systems checked by the Greek Atomic Energy Commission with respect to dose and image quality. Entrance surface air kerma (ESAK) was measured and average glandular dose (AGD) was calculated according to the European protocol on dosimetry in mammography. The ...

More than 380 Chinese adults of both sexes were studied for their total body K and 40K using the National Tsing Hua University whole-body counter. The K values were found to have an average of 1.75 {plus minus} 0.4 g K kg-1 body weight for males and 1.41 {plus minus} 0.1 g K kg-1 body weight for females. The average K value for both sexes was 1.69 {plus minus} 0.4 g K kg-1 body weight. The annual ...

We have investigated whether a relatively low dose of 500 mGy of X rays given as a single acute irradiation at different stages of pre-and postnatal development induces significant changes in the content of femoral hematopoietic progenitores during a 1-year period after irradiation. Data obtained show that, in the case of 4-day-old embryos as well as in 2-day, 8-day and ...

In previous work, we compared the proteomic profiles of rice plants growing after seed space-flights with ground controls by two-dimensional difference gel electrophoresis (2-D DIGE) and found that the protein expression profiles were changed after seed space environment exposures. Spaceflight represents a complex environmental condition in which several interacting factors such as cosmic ...

The main purpose of this work was to quantify patient organ doses from the two kilovoltage cone beam computed tomography (CBCT) systems currently available on medical linear accelerators, namely the X-ray Volumetric Imager (XVI, Elekta Oncology Systems) and the On-Board Imager (OBI, Varian Medical Systems). Organ dose measurements were performed using a fiber-optic coupled (FOC) dosimetry system ...

The phototransferred thermoluminescence (PTTL) technique is applied to the Harshaw LiF:Mg,Cu,P material. It is demonstrated that using 254-nm UV light, dose levels as low as 0.2 mGy can be re-estimated. The PTTL efficiency was found to be ? 6 % in the dose range of 0.2 mGy-1 Gy, and it appears to be dose-independent. This implies that a simple calibration ...

We report a detailed investigation of the temperature dependence of the band-edge excitonic transitions of three Zn1-x-yBexMgySe mixed crystals using contactless electroreflectance (CER) and photoreflectance (PR) in the temperature range of 15-400 K. The samples were grown by the modified high pressure Bridgman methods. The fundamental transition energy E0 and broadening ...

An effective zone solidification method has been found to prepare high purity Mg-Y biomaterials. The corrosion and mechanical properties of the purified middle region are improved remarkably compared with common casting method. The average gain size and secondary dendrite space decrease from the top layer to the bottom layer of the ingot. The oxides, defects and precipitates ...

Some physico-chemical and catalytic properties of NiO-ThO2 catalysts containing various amounts of components in the range 0-100wt% of one component have been studied before and after 1 MGy gamma or 1 and 3 MGy accelerated electron irradiation in air or in water using the hydrogen peroxide decomposition as a test reaction. The ?-irradiation of pure NiO led ...

Micro-Raman spectra have been recorded on Ge doped optical fibers before and after 10 keV-X or ?-ray irradiation up to doses of 1 MGy (X-ray) or 7.8 MGy (?-ray). Our data provide evidence that, at such dose levels, the glass matrix is not modified in a detectable way. We observed that varying the Ge doping levels from 0 to about 11 wt.%, X or ? radiation ...

Impurities (H2, D2, He, Ne or Ar) injected into steady (non-disrupting) discharges with massive gas injection (MGI) are shown to mix into the plasma core dominantly via magnetohydrodynamic activity during the plasma thermal quench (TQ). Mixing efficiencies of injected impurities into the plasma core are measured to be of order 0.05-0.4. 0D modelling of the experiments is found ...

- butyraldehyde (n-C4H8O), ethyl acetate (CH3COOC2H5), and 2-propanol (2-C3H7OH) were also formed on MgO and Mgy to acetone or 2-propanol via reverse aldol coupling (steps X and XIV) after an intramolecular hydride shift in the synthesis of higher alcohols, espe- ciallyisobutanol(2-methyl-1-propanol)onMgyAlOx.Prod- uct yields (i = ni

Fiber Bragg gratings (FBG's) written in a 10 mol.% Ge-doped core silica fiber using a phase mask were exposed to fl- radiation. The transmission and reflection spectra were recorded during irradiation up to doses in excess of 1 MGy. There was no detectable change of the Bragg peak amplitude and the grating temperature sensitivity. The radiation-induced shift of the Bragg ...

The effect of irradiation on the ferroelectric properties of Langmuir-Blodgett films of the copolymer poly(vinylidene fluoride-trifluoroethylene) was investigated using 1-MeV electrons for doses from 0.16 to 1.10 MGy, where 1 Gray (Gy)=100 rad. Irradiation causes a systematic decrease in the phase-transition temperature, crystallinity, and spontaneous polarization of the ...

This study seeks to determine the strength of polyimide materials as a function gamma-ray irradiation dose at 5 K. It compares new results with those from previous studies of epoxies made under the same conditions. The most recent efforts in this program have examined the strength and other properties of pure and glass-fiber-filled polyimide materials irradiated to a dose of 100 ...

Using a single colour fluorescence in situ hybridisation technique, dose-responses were derived for a range of chromosomally aberrant cell types and categories of aberrations induced in peripheral blood lymphocytes by alpha-particle radiation and analysed in their first in vitro division. For a range of doses that resulted predominantly in targeted cells receiving a single hit, i.e. 0-200 ...

The mitochondrial ATP synthase couples the flow of protons with the phosphorylation of ADP. A class of mutations, the mitochondrial genome integrity (mgi) mutations, has been shown to uncouple this process in the yeast mitochondrial ATP synthase. Four mutant forms of the yeast F(1) ATPase with mgi mutations were crystallized; the structures were solved and ...

Al2O3:Mg,Y ceramic thermoluminescence dosemeters were developed at the Institute of Isotopes for high dose applications at room temperatures. The glow curve of Al2O3:Mg,Y exhibits two peaks--one at 250 degrees C (I) and another peak at approximately 400 degrees C (II). In order to extend the application of these dosemeters to high temperatures, the effect ...