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Chalk River Laboratories

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About: Chalk River Laboratories is a based out in . It is known for research contribution in the topics: Neutron diffraction & Neutron scattering. The organization has 2297 authors who have published 2700 publications receiving 73287 citations.


Papers
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Journal ArticleDOI
TL;DR: Low-fat content, high mineral content, and balanced amino-acid composition qualify red deer (maral) meat as a worthy dietary and functional food.
Abstract: Aim The aim of this study was to evaluate red deer (maral) meat quality based on chemical composition, pH, water-binding capacity (WBC), and amino acid content. Materials and methods Maral meat surface morphology measurements were obtained by scanning electron microscopy. Active acidity (pH) was determined by potentiometry. Samples were analyzed for WBC by exudation of moisture to a filter paper by the application of pressure. Chemical composition (moisture, protein, fat, and ash fractions) was obtained by drying at 150°C and by extraction, using ethylic ether, and ashing at 500-600°C. The amino acid composition was obtained by liquid chromatography. Results Maral meat, with a pH of 5.85 and an average moisture content of 76.82%, was found to be low in fat (2.26%). Its protein content was 18.71% while its ash content was 2.21%. The amino acid composition showed that lysine (9.85 g/100 g), threonine (5.38 g/100 g), and valine (5.84 g/100 g) predominated in maral meat, while phenylalanine (4.08 g/100 g), methionine (3.29 g/100 g), and tryptophan (0.94 g/100 g) were relatively low in maral meat compared to other meats. The average WBC was found to be 65.82% and WBC was found to inversely correlate with moisture content. Conclusion Low-fat content, high mineral content, and balanced amino-acid composition qualify maral meat as a worthy dietary and functional food.

27 citations

Journal ArticleDOI
TL;DR: In this article, the effect of cooling rate subsequent to hot rolling on precipitate formation in the ferrite phase was investigated and it was shown that increasing the cooling rate prevents precipitate forming in the Ferrite phase at the cool deformation temperature.

27 citations

Journal ArticleDOI
16 Feb 2010-Langmuir
TL;DR: Although ribbons have been reported previously, this is the first study to show that they aggregate, most likely into extended lamellar sheets, and eventually fold into multilamellar vesicles.
Abstract: Small angle neutron scattering (SANS) and pulsed field gradient (PFG) nuclear magnetic resonance (NMR) diffusion measurements were applied to examine morphology and diffusion in dimyristoyl- plus dihexanoyl-phosphatidylcholine bicellar mixtures, either neutral or negatively charged, incorporating a Pluronic triblock copolymer (F68). Negatively charged bicellar mixtures, doped with dimyristoylphosphatidylglycerol (DMPG), exhibited SANS profiles consistent with a perforated lamellar morphology for the magnetically alignable phase. Correspondingly, F68 diffusion in this magnetically aligned phase was normal Gaussian, in that the mean square displacements increased linearly with the experimental diffusion time, with a lateral diffusion coefficient of 1.9 x 10(-11) m(2) s(-1) consistent with a lipid bilayer inserted configuration. Neutral bicellar mixtures, that is, lacking DMPG, in contrast, displayed SANS profiles characteristic of ribbons arranged in such a fashion as to produce extended lamellae. Within the lamellae, the ribbons exhibited an in-plane periodicity (interribbon) of between 120 and 140 A. Correspondingly, F68 diffusion was non-Gaussian, exhibiting a square root diffusion time dependence of the mean square displacement indicative of one-dimensional curvilinear diffusion. The presence or absence of DMPG, rather than of F68, dictated the ribbon versus lamellar morphology, with F68 reflecting this difference via its lateral diffusion behavior. Although ribbons have been reported previously, this is the first study to show that they aggregate, most likely into extended lamellar sheets, and eventually fold into multilamellar vesicles.

27 citations

Journal ArticleDOI
04 May 2015-Langmuir
TL;DR: Water uptake and swelling in a thin Nafion film on SiO2 native oxide on a Si wafer is studied as a function of relative humidity at room temperature and as afunction of temperature at 97% relative humidity by neutron reflectometry.
Abstract: Water uptake and swelling in a thin (∼15 nm) Nafion film on SiO2 native oxide on a Si wafer is studied as a function of relative humidity (8–97%) at room temperature and as a function of temperature (25–60 °C) at 97% relative humidity by neutron reflectometry. This is the first report on the behavior of thin Nafion films at elevated temperatures and high humidity. Large hysteresis is observed during the temperature cycle. The observed swelling strain in the film at 60 °C is 48% as compared to the as-deposited state, which is far above any previously observed trend at room temperature. A small decrease in the average SLD suggests that part of the additional swelling is due to thermal expansion, but the estimated D2O/SO3 ratio also increases by 70%. Half of the “excess” absorption and 73% of the additional swelling are retained during cooling back to room temperature. The results provide new insights into the dynamics of Nafion on nanometer scales under fuel cell operating conditions.

27 citations


Authors

Showing all 2298 results

NameH-indexPapersCitations
Michael D. Guiver7828820540
Robert J. Birgeneau7858722686
Mike D. Flannigan7121121327
Martin T. Dove6139614767
Luis Rodrigo5834112963
André Longtin5626016372
David Mitlin5619615479
John Katsaras552209263
John E. Greedan5539112171
Gang Li484067713
Matthew G. Tucker452247288
Bruce D. Gaulin452846698
Erick J. Dufourc431445882
Norbert Kučerka431197319
Stephen J. Skinner421948522
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
202284
202176
202072
201974
2018104