منابع مشابه
Methylation-GC-MS analysis of arabinofuranose- and galactofuranose-containing structures: rapid synthesis of partially O-methylated alditol acetate standards
Arabinose and galactose were treatedwithMeOH containing traces of H2SO4 or HCl at 25◦C to givemixtures of their methyl alphaand beta-furanosides, as shown by 1D and 2D nuclear magnetic resonance (NMR). Oxidation of the Me alpha,beta-Araf mixture with NaIO4 preferentially oxidised the beta-isomer, to give pure Me alpha-Araf . Each product was progressively O-methylated using the Purdie reagent (...
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Pheochromocytomas and paragangliomas are rare tumors of neuroendocrine tissue that have a prevalence in postmortem studies of approximately 1 in 2000 (1 ) and an estimated annual incidence of 500 –1100 in the US. They may occur within the adrenal medulla or anywhere in the sympathetic chain. Pheochromocytoma has been called the “10% tumor” because approximately 10% occur outside the adrenal med...
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Methylated and un-methylated control DNA is an important part of DNA methylation studies. Although human and mouse DNA methylation control sets are commercially available, in case of methylation studies on other species such as animals, plants, and bacteria, control sets need to be prepared. In this paper a simple method of generating methylated and un-methylated control DNA is described. Whole...
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Partially 2,3-O-methylated amyloses efficiently form inclusion complexes with polytetrahydrofuran and poly(epsilon-caprolactone) by simply mixing them in DMSO-H(2)O (1 : 9) solution, in contrast to the case of the parent amylose in which the corresponding inclusion complexes are only slightly formed.
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Methylation is one of the mest frequently used analytical methods for the structural investigation of polysaccharides. In a structural study of sulfated polysaccharides such as red algal galactans,i} this method is used not only for determining linkage position of the cornponent sugars, but also for determining the sulfate's location,2) When analyzing a red algal polysaccharide containing an ag...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1939
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)73816-7