نتایج جستجو برای: acetyl groups
تعداد نتایج: 752147 فیلتر نتایج به سال:
fibers of poplar wood (populus nigra l.) were prepared and oven dried. afterwards, they were acetylated with acetic anhydride without a catalyst. acetylation was carried out for different durations at 120ºc. different weight percentage gains (wpgs) were achieved based on the operating conditions. acetylated fibers were exposed to varying levels of relative humidity to determine equilibrium mois...
Background & Aims: Oxidative stress has a prominent role on function of injured peripheral nervous system. In this study, we aimed to investigate the effects of n-acetyl cysteine on functional, biochemical factors and ultrastructural changes induced by experimental crush on sciatic nerve in the rat. Materials & Methods: Sixty rats were divided into 5 groups, which contained 12 animals each. ...
We and others previously described the melanoma-associated oncofetal glycosphingolipid antigen 9-O-acetyl-GD3, a disialoganglioside O-acetylated at the 9-position of the outer sialic acid residue. We have now developed methods to examine the biosynthesis and turnover of disialogangliosides in cultured melanoma cells and in Golgi-enriched vesicles from these cells. O-Acetylation was selectively ...
Crystalline pepsin has been acetylated by the action of ketene in aqueous solution at pH 4.07-5.5. As acetylation proceeds the activity decreases, the decrease being more rapid at pH 5.0-5.5 than at 4.0-4.5. Three acetyl derivatives have been isolated from the reaction mixture and obtained in crystalline form. The crystal form of these derivatives is similar to that of pepsin. Fractionation and...
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