Carbohydrates distribution

Sasaki, M. and Keenan, T. W. 1979. Ultrastructural characterization of carbohydrate distribution on milk lipid globule membrane. Cell Biol Intern. Rep. 3, 67-74. 

Copper is an essential element. Copper plays a significant role in several physiological processes - photosynthesis, respiration, carbohydrate distribution, nitrogen reduction and fixation, protein metabolism, and cell wall metabolism. Many plant metalloenzymes contain copper. It also influences water permeability of xylem vessels and thus controls water relationships. It is mainly complexed with organic compounds of low molecular weight and with proteins (Henze and Umland, 1987). Kabata-Pendias and Pendias (1984) have compiled data on the Cu concentrations in... 

Lucas, C.H., Widdows, 1, and Wall, L. (2003) Relating spatial and temporal variability in sediment chlorophyll a and carbohydrate distribution with erodability of a tidal flat. Estuaries 26, 885-893. 

Figure 11.6 HPLC chromatograms of (a) the beet sugar syrup and (b) the molasses used in this work. Inset carbohydrate distribution (in weight).

Any of several measurable properties can be used for following the course of acid hydrolysis. Two most commonly employed are the copper reducing power and the specific rotation. The chemical composition or carbohydrate distribution in starch hydrolyzates is shown in Figure 1. 

P. Chantuma, P. Thaler, E. Gohet, S. Thanisawaniangkura and P. Kasemsap, Carbohydrate distribution at trunk level of Hevea brasiliensis, International Natural Rubber Conference, Ho Chi Minh City, Vietnam, 2006, 175-182. 

Because six membered rings are normally less strained than five membered ones pyranose forms are usually present m greater amounts than furanose forms at equilib rium and the concentration of the open chain form is quite small The distribution of carbohydrates among their various hemiacetal forms has been examined by using H and NMR spectroscopy In aqueous solution for example d ribose is found to contain the various a and p furanose and pyranose forms m the amounts shown m Figure 25 5 The concentration of the open chain form at equilibrium is too small to measure directly Nevertheless it occupies a central position m that mterconversions of a and p anomers and furanose and pyranose forms take place by way of the open chain form as an inter mediate As will be seen later certain chemical reactions also proceed by way of the open chain form... 

Application of NMR spectroscopy to heterocyclic chemistry has developed very rapidly during the past 15 years, and the technique is now used almost as routinely as H NMR spectroscopy. There are four main areas of application of interest to the heterocyclic chemist (i) elucidation of structure, where the method can be particularly valuable for complex natural products such as alkaloids and carbohydrate antibiotics (ii) stereochemical studies, especially conformational analysis of saturated heterocyclic systems (iii) the correlation of various theoretical aspects of structure and electronic distribution with chemical shifts, coupling constants and other NMR derived parameters and (iv) the unravelling of biosynthetic pathways to natural products, where, in contrast to related studies with " C-labelled precursors, stepwise degradation of the secondary metabolite is usually unnecessary. 

Although carbohydrates/polysaccharides exist in such huge amounts, their industrial processing is expensive due to enormous quality fluctuations of succeeding raw material batches. The reason for these fluctuations is a high variability on the molecular level, particularly in the degree of polymerization distribution, in branching characteristics, and in complex interactive properties. 

BIOORGANIC MEDICINAL CHEMISTRY BIOORGANIC MEDICINAL CHEMISTRY LETTERS CARBOHYDRATE RESEARCH HETEROCYCLES (distributed by Elsevier) TETRAHEDRON TETRAHEDRON ASYMMETRY TETRAHEDRON LETTERS... 

Lewis, D.H. (1984). Occurrence and distribution of storage carbohydrates in vascular plants. In Storage Carbohydrates in Vascular Plants, ed. D.H. Lewis, pp. 1-32. Cambridge Cambridge University Press. 

Glycolipids are widely distributed in every tissue of the body, particularly in nervous tissue such as brain. They occur particularly in the outer leaflet of the plasma membrane, where they contribute to cell surface carbohydrates. 

This asymmetry can be partially attributed to the irregular distribution of proteins within the membranes. An inside-outside asymmetry is also provided by the external location of the carbohydrates attached to membrane proteins. In addition, specific enzymes are lo-... 

Glycoproteins are widely distributed proteins— with diverse functions—that contain one or more covalently linked carbohydrate chains. 

Herein, we investigated the contents, molecular weight distribution and carbohydrate comptosition of polyuronides and hemicelluloses, and PG activity in the ripening strawberry. 

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