Stearic add

Fig. 7.23 In simulations of stearic add on a hydrophobic surface hydrogen bonding between the head groups is important in controlling the orientation of the molecules [Kim et al, 1994b],...

Acceptable answers to part 1) indude amino adds and fatty adds or specific examples of each, such as glycine or stearic add respectively. The obvious answer for part 2) is the central metabolite pyruvate, though all of the adds of the TCA cycle would be appropriate. Answers to part 3) include the prindpal add of the hexose monophosphate... 

Lubricant Prevents powder/tablets sticking Stearic add, magnesium stearate, sodium... 

A large number exist as natural ts in the form of the ethereal salts of glycerin t this is the case with butyric, pal initio, and stearic adds, which, united with glycerin, form respectively butyrin, palmitin, and stearin. 

Key SA, stearic add Sph, sphingomyelin PL, total lipids extracted from the erythrocyte ghost. 

Fig. 37. The ratio of the equivalent hard sphere volume fraction based on the measured intrinsic viscosity as a function of for polyfmethyl methacrylate) spheres with grafted poly( 12-hydroxy stearic add) layers such that a/L = 4.7 (Mewis et ai, 1989). Open and closed circles correspond to the low and high shear limits of suspension viscosity.

Some of the important organic acids occurring in nature are those in which there is a carboxyl group at the end of a long hydrocarbon chain. Palmitic acid, CjgHgiCOOH, and stearic add, CjyHgrCOOH, have structures of this sort. Oleic acid, C17H33COOH, is similar to stearic acid except that it contains a double bond between two of the carbon atoms in the chain. 

Curing tedpe, parts Polymer 3 (see Table 1 of first paper of this series) 100, Zinc Oxide S, Tetramethylthiuram Disulfide 1, Benzothiazyl Disulfide 1, Stearic Add 1, Sulfiir 1.25, cured 35 minutes at 160 °C. 

Several diseases, called malabsorption syndromes, result in the lack of absorption of a number of nutrients. Their consequent loss in the feces dearly is not desirable. Malabsorption of lipids, which occurs more frequently than malabsorption of any other class of nutrient, can result in diarrhea and steatorrhea. Steatorrhea, production of feces with a high fat content, derives its name from "stearic add," a fatt> acid, With severe steatorrhea, over 30 g fat may appear in the feces per day. The problem can be elicited by liver diseases that piev ent the pn>duction of bile salts and thus impair the absorption of fats. 

FIGURE 635 Conversion of stearic add to an 18 1 fatty add. Through formation of a double bond, stearic acid (18 0), a saturate, is converted to add (18 1), a monounsaturate. 

A. The 16-carbon, fully saturated fatty add, palmitate (16 0), is the product of the fatty acid synthase complex. It may be elongated by two carbons to form stearic add (18 0), or it may be oxidized to form palmitoleic acid (16 1,A9). Stearate can be oxidized to oleic acid (18 1,A ). Arachidonic acid (20 4,A5,8 11 14) can be synthesized from the essential fatty acid linoleate (18 2,A9 12). It cannot be produced from palmitate. Fatty acids synthesized in the liver are converted to triacylglycerols, packaged in VLDL, and secreted into the blood. 

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