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Neutral sugars hydrolysis

Hydrolysis of both neutral sugars from tylosin yields S-O-mycaminosyltylonolide (OMT) (51, R = CHO, R = R" = OH) (238). However, this compound is more conveniendy obtained by hydrolysis of mycarose from the fermentation-derived demycinosyltylosin. Analogous hydrolyses of mycarose from DMOT, GS-77-3, and GS-77-1 yield, respectively, 23-deoxy-5-0-mycaminosyltylonohde (DOMT), 20-deoxo-5-O-mycaminosyltylonohde (GS-77-4), and 5-0-mycaminosyltylactone (GS-77-2), all given in Table 9 (246,250,280). [Pg.105]

Neutral sugars were quantified by trifluoroacetic acid hydrolysis (3) and gas chormatography of alditol acetates (4). Uronic acids were determined by Blumenkrantz method... [Pg.569]

Summarised in Table 1 is the neutral sugar compositions and anhydrogalacturonic acid content of XRPP released by pectinase reaction and acid hydrolysis, respectively. In both cases, XRPP were found to be rich in xylose and galactose content, but low in mannose content. The total neutral sugar content in XRPP released by acid hydrolysis was 28.4%,... [Pg.639]

The partially methylated monosaccharides obtained on depolymerization of the permethylated sample are preferably analyzed as acetates by g.l.c.-m.s., as shown by Bjomdal and coworkers.41,42 The neutral sugars and the amino sugars obtained in acetolysis-acid hydrolysis are reduced, and acetylated for the analysis, and the amino-hexitol and the neuraminic acid residues are acetylated after methanolysis. Identification with the aid of g.l.c.-m.s. has been described for all of the common components of protein- and lipid-linked glycans and oligosaccharides from animal cells, namely, the neutral sugars,41-43 hexitols,44 hexosamines,29,43,45,46 aminohexitols,31,32 and neuraminic acids.33,34,47... [Pg.398]

Neeser and Schweizer studied hydrolysis of neutral sugars with 4 M TFA for 1 h at 125°. They used two concentrations of sugars, —0.05 M and —2.5 mM. It was found that, at the higher concentrations, recoveries... [Pg.262]

Basic Protocol 2 Determination of Noncellulosic Neutral Sugars and Cellulose Content by Trifluoroacetic Acid Hydrolysis Followed by Sulfuric Acid Hydrolysis E3.2.4... [Pg.695]

This unit provides two protocols (see Basic Protocols 1 and 2) and an alternative procedure (see Alternate Protocol) for estimating neutral sugars. Differences among these protocols are in the method of hydrolysis. The choice of method will depend on the type of information required. Basic Protocol 1 is used when only the amounts of noncellulosic neutral sugars are required. When both the noncellulosic neutral sugars and the cellulose content are required, then Basic Protocol 2 or Alternate Protocol 1 are used. [Pg.721]

DETERMINATION OF NONCELLULOSIC NEUTRAL SUGARS BY TRIFLUOROACETIC ACID (TFA) HYDROLYSIS... [Pg.721]

Transesterification, fatty acid analysis of lipids, 437, 439 Triacetin, lipase assays, 378 Triacylglycerol acylhydrolase, 371, 375, 378. See also Lipases Triacylglycerols, 432 Tributyrin, lipase assays, 378 Trichloroacetic acid (TCA) solubility index for protein hydrolysis, 152 in TBARS determination, 548-550 Trienes, conjugated, determination of, 515-517, 523-524, 526, 528 Trifluoroacetic acid (TFA), for determination of neutral sugars, 721-722, 724-725, 729-730... [Pg.767]

See other pages where Neutral sugars hydrolysis is mentioned: [Pg.174]    [Pg.174]    [Pg.537]    [Pg.102]    [Pg.22]    [Pg.209]    [Pg.216]    [Pg.457]    [Pg.498]    [Pg.512]    [Pg.553]    [Pg.591]    [Pg.637]    [Pg.638]    [Pg.982]    [Pg.398]    [Pg.80]    [Pg.114]    [Pg.54]    [Pg.268]    [Pg.268]    [Pg.272]    [Pg.301]    [Pg.271]    [Pg.18]    [Pg.22]    [Pg.82]    [Pg.86]    [Pg.65]    [Pg.184]    [Pg.184]    [Pg.120]    [Pg.726]    [Pg.730]    [Pg.735]    [Pg.35]    [Pg.36]    [Pg.216]   
See also in sourсe #XX -- [ Pg.262 ]

See also in sourсe #XX -- [ Pg.46 , Pg.262 ]



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Neutral hydrolysis

Neutral sugars

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