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71.
72.
Ashish Bhattacharjee Mesbahuddin Ahmed Abhijit Mookerjee Amal Halder 《Bulletin of Materials Science》2003,26(1):199-205
We use the self-consistent, augmented space recursion technique to study the electronic structure and magnetic properties
of alloys of the transition metals, Fe, Co and Ni with the noble metals, Ag and Au. We analyse the effect of local environment
and the hybridization between the constituent bands on the electronic and magnetic properties. 相似文献
73.
D. Bhattacharjee J. F. Knott C. L. Davis 《Metallurgical and Materials Transactions A》2004,35(1):121-130
Thermomechanically controlled rolling of steel plate can involve substantial straining in the intercritical temperature region,
which may result in the final ferrite grains not fully recrystallizing, and, hence, the presence of low-angle grain boundaries.
It is shown in this article that a Nb-microalloyed thermomechanically controlled rolled (TMCR) steel can contain a high proportion
of low-angle grain boundaries (the extent depending on the thermomechanically controlled rolling schedule) and that during
toughness testing, the crack front ignores boundaries with less than a 12 deg misorientation. Thus, the average microstructural
unit experienced by the crack front (i.e., the cleavage facet) is significantly larger than the average metallographic, two-dimensional grain size. Consequently, use
of the metallographic grain size gives a poor prediction of the impact transition temperature (ITT) and fracture stress for
these steels. It is also shown that the micromechanism of crack initiation and propagation involves grain-boundary carbides
and groups of closely aligned grains that act as single “effective” grains. 相似文献
74.
In this work, we use a dissipative-particle-dynamics (DPD)-based two-phase model to study the breakup of liquid nanojets.
We show that the breakup of nanojets is accelerated by the presence of thermal fluctuations. Satellite drops, which are undesirable
from an application viewpoint, are not observed in our simulations. We find that the presence of a repulsive wall enclosing
the DPD liquid is necessary to prevent clogging of nanojets. We are able to recover the time evolution of minimum jet radius
as given by prior theoretical analysis. This study shows that DPD is able to capture the thermal induced breakup phenomena
at the sub-micron level. The coarse-grained nature of DPD along with its flexibility to allow for the modeling of complex
fluids in combination with the results from this study show that DPD is a useful tool for sub-micron fluid flow simulations. 相似文献
75.
A distributed environment that supports multimedia interfaces, Shastra strengthens collaboration in scientific and engineering design. Implemented on a desktop system, it provides an infrastructure for user- and application-level cooperation. We describe the Shastra architecture and tools, then walk through a scenario that shows how it enhances collaborative problem solving 相似文献
76.
Chandana Sengupta Anupam Sengupta Amitabha Ghosh 《Journal of the science of food and agriculture》1976,27(12):1115-1122
Fatty acid and triglyceride compositions of the seed oil of Thea sinensis (tea seed oil) of Indian origin have been determined by combination of techniques of low temperature crystallisation, spectrophotometry, pancreatic lipase hydrolysis, thin-layer chromatography, gas–liquid chromatography and densitometry. Percentages of individual fatty acids were found to be: palmitic, 17.8; stearic, 3.0; oleic, 59.9; linoleic, 18.0. Triglyceride composition was calculated from the fatty acid compositions of the native oil and of the monoglycerides produced from it by pancreatic lipase hydrolysis. The oil is composed of 0.7, 11.1, 41.9 and 46.3% GS3, GS2U, GSU2 and GU3 respectively. Prominent features of the oil is its content of 11.6, 21.4 and 22.0% dioleolinolein, triolein and dioleopalmitin respectively. 相似文献
77.
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80.
Anupam Dikshit N.K. Dubey N.N. Tripathi S.N. Dixit 《Journal of Stored Products Research》1983,19(4):159-162
Seeds of two spices Coriandrum sativum and Foeniculum vulgare, were dressed separately with essential oil of Cedrus deodara as well as with five synthetic fungicides viz., phenylmercury acetate, 2-methoxyethyl mercury chloride, copper oxychloride, mancozeb and wettable sulphur. Treated seeds were stored in polythene bags for 12 months. On mycofloral analysis, the oil had checked the appearance of ten fungi, Absidia sp., Alternaria alternata, Aspergillus flavus, A. fumigatus, A. niger, A. ruber, A. versicolor, Cladosporium cladosporioides, Curvularia lunata, and Paecilomyces variotii on the seeds of C. sativum, and seven fungi, Absidia sp., A. flavus, A. fumigatus, A. niger, A. ruber, A. versicolor, and Rhizopus spp., on the seeds of F. vulgare. The oil proved to be more effective than the synthetic fungicides. Further, the oil did not show any adverse effect on seed germination and seedling growth of both spices. 相似文献