نتایج جستجو برای: nucleating agent
تعداد نتایج: 254754 فیلتر نتایج به سال:
Molecular dynamics simulations reveal the structural and energetic properties of carbon dioxide clusters nucleating in gas phase at extreme undercooling.
Desert dust is one of the most important atmospheric ice-nucleating aerosol species around the globe. However, there have been very few measurements of ice-nucleating particle (INP) concentrations in dusty air close to desert sources. In this study we report the concentration of INPs in dust laden air over the tropical Atlantic within a few days’ transport of one of the world’s most important a...
Nucleation of microtubules is central to assembly of the mitotic spindle, which is required for each cell division. -Tubulin is a universal component essential for microtubule nucleation from centrosomes. To elucidate the mechanism of microtubule nucleation in budding yeast we reconstituted and characterized the yeast -tubulin complex (Tub4p complex) produced in insect cells. The recombinant co...
Some ice-nucleating bacterial strains, including Pantoea ananatis (Erwinia uredovora), Pseudomonas fluorescens, and Pseudomonas syringae isolates, were examined for the ability to shed ice nuclei into the growth medium. A novel ice-nucleating bacterium, Pseudomonas antarctica IN-74, was isolated from Ross Island, Antarctica. Cell-free ice nuclei from P. antarctica IN-74 were different from the ...
The presence of nucleating agents in the hemolymph appears to be a characteristic feature of insects tolerant to freezing (10). Such nucleators have been found in the hemolymph of insects of several phylogenetic orders, i.e., Coleoptera (4, 8, 9, 1 l), Diptera (7), and Hymenoptera (5). The physiological function of these nucleators is suggested to be to induce a protective extracellular freezin...
Energy storage and mobility industries use polypropylene (PP) nanocomposites. The energy applications of newly made microporous SiO2 filled, porous PP nanocomposites combining PP, natural rubber, nanoparticles then subsequently removing rubber from the nanocomposite were explored in this paper. SEM pictures showed how pore morphology was altered by nanofillers. Mechanical tensile tests reveal t...
Composite filaments consisting of poly(lactic acid) (PLA) and micro crystalline cellulose (MCC) were successfully used for additive manufacturing (AM) by fused filament fabrication (FFF). PLA MCC bio-composites obtained direct mixing in a melt compounder; maleic anhydride (MAH) was also grafted onto reactive stage to evaluate its effect on the final properties printed material. Filaments with v...
Abstract Hybrid composites were prepared from a PP homopolymer, talc and PVA fibers by twin-screw extrusion injection molding. Talc was added to improve stiffness, while the serve increase impact resistance. Mechanical properties characterized tensile testing, structure studied SEM optical microscopy. The results showed that has strong nucleating effect in used spite of fact grade contained age...
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