Monoglycerides, Total

Residual Catalyst (as F) Not more than 0.5 mg/kg. Total Glycerides Not less than 98.0% of total. Monoglycerides Not more than 1.0%. 

Total Glycerides Determine as directed under Total Monoglycerides, Appendix VII, except save all three elution fractions to determine the percentages of Mono glycerides, Diglycerides, and Triglycerides. 

The following specifications should conform to the representations of the vendor Hydroxyl Value, Iodine Value, 1-Mono-glyceride Content, Saponification Value, and Total Monoglycerides. 

Total Monoglycerides Determine as directed under Total Monoglycerides, Appendix VII. 

The 1-monoester content is usually determined by a standard periodic acid titration method (A.O.C.S. Cd. 11-57) and total monoglyceride content can be determined quantitatively by modern gas liquid chromatography methods (S0e, 1983). 

D6584 Total monoglycerides, total diglycerides, total triglycerides, and free and total glycerin in B-1 00 by Gas Chromatography EN 141078 FAME in diesel fuel by IR... 

Properties Wh, waxy solid mild taste sol. in ethanol, xylene insol. in water, hexane HLB 3.5 acid no. 3 max. iodine no. 75-85 100% cone. 93% min. total monoglycerides Excel P-40 [Kao Corp.]... 

Chromarod FID peaks of sterols, diglycerides, monoglycerides, and polar lipids are narrower and sharper than peaks of triglycerides and free fatty acids when analyzed using either method described in this unit (see Basic Protocol and Alternate Protocol). Hydrogenation of total lipids (see Support Protocol) results in much sharper and narrower peaks, which in turn substantially improves the resolution between lipid classes. The accuracy and precision in quantitating lipid classes of vegetable oils and animal fats are expected to be better than those from marine lipids. 

Ferreira-Dias et al. (15) tested Lipozyme IM-20 for the glycerolysis of olive oil residue in n-hexane aimed at the production of monoglycerides and diglycerides. The highest monoglyceride production was in the range of 43-45% (w/w), on the basis of total fat, with about 26% Lipozyme IM-20. 

Decreased uptake as a mechanism of resistance was also observed in houseflies resistant to organochlorine, organophosphate, and carbamate insecticides. Resistant strains had higher total lipids, monoglycerides, diglycerides, fatty acids, sterols, and phospholipids in the cuticle than did the susceptible strain (Patil and Guthrie, 1979). 

At higher temperatures and water concentrations, the system may shift into the cubic mesophase structure (see Figure 15). The water is present as spheres totally surrounded by monoglyceride. This phase has a high viscosity and is sometimes called viscous isotropic in the hterature the two terms refer to the same structure. In the presence of more water than can be accommodated in the internal spherical phase, one obtains a mixture of lumps of this cubic structure dispersed in excess water. With a saturated monoglyceride such as GMS, the lamellar structure is the main mesophase found under practical conditions, while with unsaturated monoglycerides this cubic phase is the predominant one at lower temperatures. At lower water concentrations, the spherical water micelles are farther apart, so the viscosity of the mixture becomes lower, approaching that of melted pure surfactant. This is the fluid isotropic mesophase, sometimes referred to as the L2 phase. 

Fig. 10.9 Pyloric and duodenal outputs of lipolysis products and residual meal triglycerides during the digestion of a liquid test meal. The distribution of total meal TG acyl chains (mol%) in lipolysis products (free fatty acids FFA diglycerides DG monoglycerides MG) and residual triglycerides (TG) is plotted as a function of meal gastric emptying (%).

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