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eBook Polysaccharide Shapes (Outline Studies in Biology) ePub

eBook Polysaccharide Shapes (Outline Studies in Biology) ePub

by D. A. Rees

  • ISBN: 0412130300
  • Category: Chemistry
  • Subcategory: Math Science
  • Author: D. A. Rees
  • Language: English
  • Publisher: Springer; 1 edition (August 25, 1977)
  • Pages: 80
  • ePub book: 1161 kb
  • Fb2 book: 1902 kb
  • Other: azw lrf rtf mobi
  • Rating: 4.6
  • Votes: 361

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Semantic Scholar extracted view of "Polysaccharide Shapes. Outline Studies in Biology. oceedings{harideSO, title {Polysaccharide Shapes.

Semantic Scholar extracted view of "Polysaccharide Shapes. D. A. Rees" by Gerald O. Aspinall. Rees}, author {Gerald O. Aspinall}, year {1978} }. Gerald O.

New Biological Books. Polysaccharide Shapes. Aspinall, "Polysaccharide Shapes.

Part of the Outline Studies in Biology book series (OSB). Cite this chapter as: Rees . 1977) Basic ideas about molecular shape. In: Polysaccharide Shapes. Fundamental to our understanding of the properties of all biopolymers, is the shape in three dimensions - known as the conformation. As we shall see later, this can be fixed and stable or it may fluctuate continuously - depending on the particular polymer and on the conditions at the time.

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Polysaccharide Shapes book.

Thus, polysaccharides are high-molecular weight carbohydrate molecules that contain many monosaccharide units. Most polysaccharides are much larger than the 20-unit limit of oligosaccharides. The number of monosaccharide units in a polysaccharide, which is termed its degree of polymerization (DP), varies with polysaccharide type. Only a few naturally occurring polysaccharides have DPs less than 100; most have DPs in the range 200–3000. The larger polysaccharides, like cellulose (Chapter 8), have DPs of 7000–15,000. The amylopectin component of starch (Chapter 6) is even larger, having average.

Crude polysaccharides, extracted from the stem of Atractylodes .

Crude polysaccharides, extracted from the stem of Atractylodes macrocephala Koidz by hot water (80°C), were fractionated by DEAE-52 anion exchange chromatography and purified by Sephadex G-200 gel filtration chromatography to afford a fraction, named WAM. The polysaccharide (WAM) was subjected to structural identification by a combination of chemical and instrumental analysis. In this study, an experiment was designed to optimize the synthesis of seleno-Capparis spionosa L. polysaccharide (Se-CSPS) by response surface methodology.

The study of cells is called cell biology, cellular biology, or cytology The capsule may be polysaccharide as in pneumococci, meningococci or polypeptide as Bacillus anthracis or hyaluronic.

The study of cells is called cell biology, cellular biology, or cytology. The cytoskeleton acts to organize and maintain the cell's shape; anchors organelles in place; helps during endocytosis, the uptake of external materials by a cell, and cytokinesis, the separation of daughter cells after cell division; and moves parts of the cell in processes of growth and mobility. The capsule may be polysaccharide as in pneumococci, meningococci or polypeptide as Bacillus anthracis or hyaluronic acid as in streptococci. Capsules are not marked by normal staining protocols and can be detected by India ink or methyl blue; which allows for higher contrast between the cells for observation.

Like disaccharides, polysaccharides are formed by condensation reactions. Polysaccharides are mainly used as an energy store and as structural components of cells. The major polysaccharides are starch and cellulose in plants, and glycogen in animals. It is usually stored as intracellular starch grains in organelles called plastids. Plastids include green chloroplasts (. in leaves) and colorless amyloplasts (.

Polysaccharides are complex biomacromolecules that are made up chains of monosaccharides. The bonds that form these chains are glycosidic bonds. Commonly found monomer units in polysaccharides are glucose, fructose, mannose and galactose which are simple sugars. Functions of Polysaccharides. Polysaccharides form a crucial part of cell function and structure. Storage polysaccharides: Polysaccharides such as starch and glycogen are called storage polysaccharides because they are stored in the liver and muscles to be converted to energy later for body functions. Starch is found in plants whereas glycogen is found in animals.

80p black paperback with illustrated laminated cover, from a Cambridge college library, very little used, pages clean with diagrams, further reading and index, very good