Carbohydrate-based

The diluent portion also determines the form, or physical appearance, of the flavor, ie, Hquid, powder, or paste. Liquid flavor forms include water-soluble, oil-soluble, and emulsion forms powder flavor forms include plated (including dry solubles), extended, occluded, inclusion complexes, and other encapsulated forms and paste flavor forms include fat, protein, and carbohydrate-based paste. 

PaseUi-SA-2 potato Carbohydrate-based mimetics Avebe... 

Total syntheses of pyrrole alkaloids, furanoterpenes, macrolide antibiotics, and carbohydrates based on transformations catalyzed by transition metals 99SL1523. 

Compounds in carbohydrate-based synthesis of 2,3-dihydro-4//-pyranones as starting compounds for the preparation of C-saccharides, glycosylstan-nanes, and analogs of tromboxane A2. 98EJ02267. 

Sialic acid (Section 25.7) A group of more than 300 carbohydrates based on acetylneuramic acid. 

For chelation control in carbohydrate-based Strecker syntheses, see H. Kunz. W. Sager, Angew. Chem. 99, 595 I.E. 26. 557 (1987). 

Nowadays, a strategic area of research is the development of polymers based on carbohydrates due to the worldwide focus on sustainable materials. Since the necessary multi-step synthesis of carbohydrate-based polymers is not economical for the production of commodity plastics, functionalization of synthetic polymers by carbohydrates has become a current subject of research. This aims to prepare new bioactive and biocompatible polymers capable of exerting a temporary therapeutic function. The large variety of methods of anchoring carbohydrates onto polymers as well as the current and potential applications of the functionalized polymers has been discussed recently in a critical review [171]. Of importance is that such modification renders not only functionality but also biodegradability to the synthetic polymers. 

Some of the potential uses of the fats and oils found in plants have been reviewed and some uses of carbohydrate-based polymers briefly discussed. Plants contain a whole variety of other chemicals including amino acids, terpenes, flavonoids, alkaloids, etc. When the potential for these naturally occurring materials are combined with the secondary products that can be obtained by fermentation or other microbial processes or by traditional chemical transformations, the array of chemicals that can readily be created from renewable resources is huge. In this section a few of the more interesting examples are considered. 

Berger, I., Hanif, M., Nazarov, A. A., Hartinger, C. G., John, R. O. Kuznetsov, M. L. et al. In Vitro Anticancer Activity and Biologically Relevant Metabolization of Organometallic Ruthenium Complexes with Carbohydrate-Based Ligands. Chemistry Europ. Journal 14, 9046-9057 (2008). 

Eggleston, G. and Vercellotti, J.R. (eds) (2007) Industrial Applications of Enzymes on Carbohydrate-based Materials, ACS Symposium Series 6, Oxford University Press. 

Reeves, A.R., Britain, I.A., Cemota, W.H. et al. (2006) Effects of methylmalonyl-CoA mutase gene knockouts on erythromycin production in carbohydrate-based and oil-based fermentations of Saccharopolyspora ery-thraea. Journal of Industrial Microbiology and Biotechnology, 33, 600-609. 

L. L. Kiessling, J. K. Pontrello, and M. C. Schuster, Synthetic multivalent carbohydrate ligands as effectors or inhibitors of biological processes, in C.-H. Wong, (Ed.), Carbohydrate-Based Drug Discovery, Wiley-VCH Weinheim, Germany, 2003, pp. 575-608. 

Rg. 60. Schematic representation of a fully synthetic carbohydrate-based vaccine. 

R. Roy, New trends in carbohydrate-based vaccines, Drug Discov. Today, 1 (2004) 327-336. 

Koganty, R.R., Reddish, M.A., and Fongenecker, B.M. (1996) Glycopeptide- and carbohydrate-based synthetic vaccines for the immunotherapy of cancer. Drug Disco. Today, 1, 190-198. 

Clycosylation Reactions and Related Carbohydrate-Based Transformations... 

Heparin is a carbohydrate-based (glycosaminoglycan) anticoagulant associated with many tissues, but mainly found stored intracellularly as granules in mast cells that line the endothelium of blood vessels. Upon release into the bloodstream, heparin binds to and thereby activates an additional plasma protein, namely antithrombin. The heparin-antithrombin complex then binds a number of activated clotting factors (including Ha, IXa, Xa, XIa and Xlla), thereby inactivating them. The heparin now disassociates from the complex and combines with another antithrombin molecule, thereby initiating another turn of this inhibitory cycle. 

The adjuvanticity of liposomes depends upon their composition, number of layers and charge characteristics. They act as effective adjuvants for both protein- and carbohydrate-based antigens and help stimulate both B- and T-cell responses. Their likely mode of action includes depot formation, but they also possibly increase/enhance antigen presentation to macrophages. The exact molecular mechanism(s) by which they stimulate a T-cell response remains to be elucidated,... 

Tungsten aryloxo complexes have been shown to catalyze the intramolecular metathesis reactions of di- and tri-substituted co-unsaturated glucose and glucosamine derivatives to yield bicyclic carbohydrate-based compounds containing 12- and 14-membered rings [108,214,215]. An example is shown in Eq. 37. The tolerance for amides and esters is noteworthy, as are the yields and the size of the rings that are formed. 

Scheme 6. Carbohydrate based urethane protecting groups...

To date, the studies that have tried to link dietary fat to increased risk of coronary heart disease have remained ambiguous. Studies have shown that cholesterol-lowering drugs help reduce the risk of heart (45) disease, but whether a diet low in cholesterol can do the same is still questionable. While nutrition experts are debating whether a low-fat, carbohydrate-based diet is the healthiest diet for Americans, nearly all agree that the anti-fat message of the last twenty years has been oversimplified. For example, some fats and oils like those found in olive oil... 

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