نتایج جستجو برای: methyl groups
تعداد نتایج: 828918 فیلتر نتایج به سال:
Starch-g-polyacrylonitrile (starch-g-PAN) copolymers were prepared by ceric ammonium nitrate initiation, and the major portion of the starch in these graft copolymers was then removed by acid hydrolysis to yield PAN with oligosaccharide end groups. Although these PAN-oligosaccharide samples reacted with methyl methacrylate in the presence of eerie ammonium nitrate, the resulting products were l...
It is known from the work of Elwyn et al. (1) that ethanolamine is incorporated as a unit into the choline molecule during the synthesis de novo of this substance. Du Vigneaud et al. (2, 3) showed that at least some of the methyl groups of choline are derived directly from the methyl group of methionine; and in an earlier communication we provided evidence that all the methyl groups originate f...
The poly A-containing mRNA of cultured hamster (BHK-21) cells has been examined with regard to methylation status. Steady state-labeled mRNA was obtained by incubating cells for 20-22h in the presence of [methyl-3H]-methionine and 32Pi. The degree of methylation of this RNA was 1.8 methyl groups per 1000 nucleotides, or 4-5 methyl groups on the average per molecule. The nature of the methylated...
The asymmetric unit of the title compound, C30H48O2, contains two independent mol-ecules, the main difference between them being that the isopropenyl group is rotated by approximately 180°. In each mol-ecule, the fused six-membered rings have chair-chair-chair-chair conformations and the cyclo-pentane ring adopts an envelope conformation with the C atom bearing the hy-droxy-methyl group as the ...
in this research, the microstructural of low molecular weight 1,2-polybutadiene (1,2-pbd) was conducted by 1h and 13c nuclear magnetic resonance spectroscopy (nmr) to determine the isomeric contents of 1,4-cis, 1,4-trans and 1,2-vinyl in 1,2-pbd polymer structures. number average molecular weight for low molecular weight 1,2-pbd was measured by nmr techniques and the results were compared with ...
It is generally recognized that formate is converted to a compound which is utilized in the synthesis of serine (l-3), purines (4, 5), and labile methyl groups (6-8) in animal tissues. Futhermore, compounds which, in the course of their metabolism, form a lrCl compound”l similar to the one formed from formate likewise serve as precursors in the synthetic reactions mentioned above (cf. (9, 10))....
Abstract Peptides with strong binding affinities for poly(methyl methacrylate) (PMMA) resin were designed by use of materials informatics technology based on molecular dynamics simulation the purpose covering surface adhesive peptides, which expected to result in eco-friendly and biocompatible biomaterials. From results affinity obtained this simulation, it was confirmed that experimental value...
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