نتایج جستجو برای: especially nylons
تعداد نتایج: 393902 فیلتر نتایج به سال:
The Cosmetic Ingredient Review Expert Panel (Panel) reviewed the safety of nylon polymers, which function in cosmetics primarily as bulking and opacifying agents. The Panel reviewed relevant animal and human data related to these large polymers and determined that they are not likely to penetrate the skin. Whatever residual monomers may be present were not present at a sufficient level to cause...
Flocked swabs (Copan) were compared to rayon swabs (Copan) for the nasal detection of Staphylococcus aureus in 90 healthy volunteers sampled sequentially during a 5-week period. The use of flocked swabs improved the number of nasal carriers (P = 0.026), the number of positive specimens (P = 0.01), and the quantity of bacteria in positive samples (P = 0.004).
Intermediate stages during membrane formation by means of immersion precipitation were studied by cryo-substitution for the system nylon 4,6, formic acid and water. The presence, nature and size of solid particles was determined as a function of time and of the distance from the interface. The spherulitic nature of these particles was confirmed by staining the samples. It was shown that at a re...
What makes some acts immoral? Although Western theories of morality often define harmful behaviors as centrally immoral, whether this is applicable to other cultures is still under debate. In particular, Confucianism emphasizes civility as fundamental to moral excellence. We describe three studies examining how the word immoral is used by Chinese and Westerners. Layperson-generated examples wer...
Hydrogen bond directed folding of a synthetic polyamide was studied in chloroform solution, and the three-dimensional structure of the foldamer determined using 1H NMR chemical shifts.
A new fluorescent sensor based on the BODIPY fluorophore and the polyamide receptor for Pb(2+) was designed and synthesized. The sensor is highly selective for Pb(2+) over relevant competing metal ions, and sensitive to ppb levels of Pb(2+). It features the most sensitive probe to date for Pb(2+) ions in water.
In this work, Concurrent Engineering (CE) approach has been used to determine the most optimum decision on design concept and material of the composite accelerator pedal at conceptual design stage. Comprehensive studies are carried out to prepare the design specifications of composite accelerator pedal. Various design concepts are generated using the Morphological approach. In particular at des...
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