Draw three repeating segments of the polymer of cotton, and beta cellulose
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Draw three repeating segments of the
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- Rhaminose is a trisaccharide comprised of fructose (B(2→1), fructose (B(2→1) and glucose. Draw the trisaccharide with the hexose in its chair conformations. Indicate the anomeric carbons, the non-reducing end and any other structural details of interest.What does it mean for chitosan to have high bioadhesive properties? In which areas is this feature important for the use of this natural polymer? Explain with an example. b) What properties of chitosan make it possible to use it in different tissue engineering applications? Give an exampleAccording to the configuration of the isostatic, syndiotactic and atactic polymers. Define each of the three configurations and give an example of each of the configurations.(Add the internet link or the bibliographic source where they found the information of the examples)
- α‑Keratin is an intermediate filament with a basic structural unit of two α helices in a coiled coil. Each helix has a seven‑residue repeating unit (heptad repeat). A representation of the α helices of a coiled coil dimer is shown. Each letter represents a different amino acid residue.Our laboratory has a stock of 50 X TAE (Tris-Acetate) and the laboratory manager asks you to prepare a 2% gel using 1XTAE that you will prepare from agarose and stock. How do you prepare? (tank tray volume 250 ml).Why does gelatin harden and change color when exposed to Glutaraldehyde? Why does this same effect not happen to agarose?
- Which of the following is the correct glycosidic bond linkage of the disaccharide shown? β-(1→6) glycosidic bond α-(1→6) glycosidic bond α-(1→1) glycosidic bond β-(1→1) glycosidic bondplease explain The porosity of the PAGE gel is determined by the ratio of acrylamide and the amount of .............................. (TEMD, bis-acrylamide, SDS, Glycine, Coomassie blue, iodocetate acetate, His tag, ammonium persulfate)Both a-keratin and collagen are fibrous proteins.however,the hydrogen bonding pattern is different between the helices of the respective proteins.what os the major difference?
- Which of the following is a property of both D-altrose and D-talose?All naturally occurring polysaccharides have one terminal residue, which contains a free anomeric carbon. Why do these polysaccharides not give a positive chemical test for a reducing sugar?Please explainWhat changes in the structure of each polysaccharide affect its gelling property? Explain in five sentences.