Sugar acid components

Weith, H.L., Wiebers, J.L., and Gilham, P.T. (1970) Synthesis of cellulose derivatives containing the dihy-droxyboryl group and a study of their capacity to form specific complexes with sugars and nucleic acid components. Biochemistry 9, 4396-4401. 

Over thirty publications resulted from Tipson s work in Levene s laboratory. Along with the work on nucleic acid components, he also studied the structures of gum arabic and other plant gums, and conducted a range of synthetic investigations on sugars, with particular emphasis on uronic acids and 5-carbon ketoses. His 1939 observation that acetylated glycosyl halides... 

The tandem transesterification/[3 + 2]-cycloaddition methodology is be a powerful synthetic tool, since it guarantees high diastereoselectivity even under thermal conditions. It has been successfully apphed to synthetic work of the N-terminal amino acid component of Nikkomycin Bz (Scheme 11.53) (173). Thus, the sugar-based oxime is condensed with a glyoxylate hemiacetal to produce a chiral nitrone ester, which is then reacted with ( )-p-niethoxycinnamyl alcohol in the presence of a catalytic amount of TiCU at 100 °C. After the intramolecular cycloaddition, the... 

Catterall H, Davies MJ, Gilbert BC (1992) An EPR study of the transfer of radical-induced damage from the base to sugar in nucleic acid components relevance to the occurrence of strand-breakage. J Chem Soc Perkin Trans 2 1379-1385... 

N. K. Kochetkov, B. A. Dmitriev, and L. V. Backinowsky, New sugars from antigenic lipo-polysaccharides of bacteria Identification and synthesis of 3-0-[(R)-l-carboxyethyl]-L- rham-nose, an acidic component of Shiqella dysenteriae type 5 lipopolysaccharide, Carbohydr. Res., 51 (1976) 229-237. 

While most of the studies carried out to date have focused on the evolution of the primary compounds, such as the sugar and acid components, little data exist for the other quality characteristics, and in particular, for aroma. However, most of these studies have been conducted on the aromatic varieties. For instance, some experimental studies conducted on different aromatic cultivars under different conditions mainly reported the evolution of terpene compounds during the dehydration process. Accordingly, it has been showed that after the grape harvest, activation or inhibition of the metabolism involved in the biosynthesis of the aroma compounds is strictly dependent on the grape dehydration technique. 

Anhydro sugars occur as components of seaweed polysaccharides such as alginate and agar. Sugar acids occur in the pectic sub-... 

In sugar confectionery the pH of the product is important for a number of reasons. Fruit-flavoured products normally have some acid component added to complement the fruit flavour. Where a hydrocolloid is present the pH of the product can be critical otherwise the product will not be stable or it may not gel at all. If a hydrocolloid is held at its... 

Component of proteins, enzymes, phosphohpids, and nucleic acids Component of proteins, coenz3mies, nucleic acids, oils, phospholipids, sugars, starches Critical in energy transfer (ATP)... 

Almost all the polysaccharide fractions (glycogen excepted) isolated from M. tuberculosis contained small amounts of nitrogen and phosphorus. Amino sugars have been detected in some polysaccharides, but in the main, the mode of occurrence of the less well-defined constituents remains undetermined. Similarly, some of the polysaccharide fractions have been stated to possess acid properties. Uronic acids have not, however, been identified in the hydrolysis products, nor have any other acidic components been conclusively identified. 

Tamura, O, Mita, N, Kusaka, N, Suzuki, H, Sakamoto, M, Intramolecular cycloaddition of a-allyloxycarbonylnitrone bearing a chiral sugar auxiliary a short-step synthesis of the A-terminal amino acid component of nikkomycin Bz, Tetrahedron Lett., 38, 428-432, 1997. 

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