Digestion studies

Perez-Vicente, A., Gil-Izquierdo, A., and Garcia-Viguera, C., In vitro gastrointestinal digestion study of pomegrate juice phenolic compounds, anthocyanins, and vitamin C, J. Agric. Food Chem., 50, 2308, 2002. 

B17. Borgstrom, B., Lindquist, B., and Lundh, G., Digestive studies in children. Studies under normal and pathological conditions. A.M.A. J. Diseases Children 101, 454-466 (1961). 

Webb, T, Jackson, P. J., and Morris, G. E. (1997) Protease digestion studies of an equilibrium intermediate in the unfolding of creative kinase Biochem J 321, 83—88. 

Digestibility studies with brown midrib mutants of maize (Bames et al., 1971 Barriere et al., 1994 2004 Fontaine et al., 2003), sorghum (Porter et al., 1978 Akin et al., 1986) and pearl millet (Chemey et al., 1990 Akin et al., 1991) have indeed shown that some of the mutants are considerably more easily digestible. The fact that some of the mutants do not show much improvement indicates that not all changes in cell wall composition are automatically of practical use. 

Marx, K.A. and Reynolds, T.C. (1983) Ion competition and micrococcal nuclease digestion studies of spermidine-condensed calf thymus DNA. Evidence for toms organization by circumferential DNA wrapping. Biochim. Biophys. Acta, 741, 279-287. 

Digermanes, unsymmetrically substituted, 3, 787 Digermenes, preparation, 3, 796 Digestion studies, stability, 12, 612-613 DIGISIM, in cyclic voltammetry, 1, 282-283 Digital simulations, in cyclic voltammetry, 1, 282 Dihalides, in chromium mononitrosyl complexes, 5, 302 Dihaloarenes, cross-coupling polymerization, 11, 659... 

Cornell H J. Mucosal digestion studies of whole gliadin fractions in coeliac disease. Ann Clin Biochem 1990 27 44-49. 

Digestion studies using homogenates of kidneys, intestine, and liver indicated a close relationship between the levels of aminopeptidase activity as measured with a specific synthetic substrate and that based on the enzymatic activity responsible for hydrolyzing the isopeptide bond (see Table V). Purified aminopeptidase N from the intestinal brush border of rabbit (68) and pig (64) hydrolyzed a dipeptide and the related isodipeptide with about the same efficiency (see Table VI). These results may explain the findings that methionine covalently bound... 

The inspiration for pressure digestion studies came from a US Bureau of Mines report [76], which described how rapid dissolution of some mineral samples could be achieved using a microwave oven to heat samples of an acid mixture contained... 

In anaerobic treatment, failure of this type is usually evidenced by the near cessation of methane production and decreased COD removal. Several investigators (5, 16, 17) have reported that kinetic failure is also characterized by a build-up in the concentration of long and short chain fatty acids, the predominate precursors of methane. McCarty (7) and O Rourke (3), in laboratory digestion studies on primary sewage sludge conducted at 35 °C, confirmed the fact that the fermentation of short and... 

Graham, H. Aman, P. The pig as a model in dietary fibre digestion studies. Scand. J. Gastroenterol., Suppl. 1987, 129, 55-61. 

Cellulose substrates used in digestion studies were (ground) Solka Floe alpha cellulose, a non-nutritive fiber used for formulating animal diets (Gen. Biochem. Co.) Avicel, microcrystalline cellulose (American Viscose) heated milled Solka Floe (7) and (not ground) Whatman No. 1 filter paper, cotton sliver (25) and absorbent cotton (White Cross Co.). 

Barton NWH and Houston DC (1991) The use of titanium dioxide as an inert marker for digestion studies in raptors. Comp Biochem Physiol 100A 1025-1029. 

The authors wish to express their appreciation for the financial support of the work described in this paper by United Gas Pipe Line Co., and especially for the many valuable discussions and suggestions provided by Dr. Victor Edwards and Robert Christopher of United. The authors also appreciate the assistance supplied by Mike Henry. Al Iverson, Frank Sedzielarz, and Janet Vorres, who performed the experimental digestion studies, and by James Ingemanson and Robert Stotz and their staff who performed many of the chemical analyses. Special thanks is given to Mr. Dawson Johns of North Louisiana Hill Farm Experiment Station for supplying the Bermuda grass and information on its production. 

Binary rare earth oxides have also been evaluated as inert markers in apparent digestibility studies. An inert marker for the estimation of digestibility needs the following conditions. 

Beyond the alkali metals, occasional examples of the use of flame emission have been presented. Ytterbium has been used as a tracer in digestibility studies in large animals. Flame atomic absorption for this element was beset by many interferences when the wet-ashed excreta were analyzed directly. A simple rapid carrier precipitation technique was devised, with lanthanum oxalate as the carrier and the phases separated by centrifuging. A small aliquot of the digests could be taken and all steps performed in a 15 ml centrifuge tube. When combined with flame emission in the NOA flame, the method was sufficiently sensitive, reliable, and rapid. To employ atomic absorption, the method has to be scaled up 10-fold or more. 

In contrast, on the basis of tryptic digestion studies, the very lysine-rich histones are believed to be made of a large population of proteins that might be involved in conferring some forms of specificity. The carboxy terminal halves of all of these molecules may be common to all histones, whereas the N-terminal segment (15-20% of the molecule) is different and might thus influence specificity. However, even if the lysine rich histones were in any way specific, one would anticipate that they would exhibit this specificity only after combination with other molecules e.g., DNA, nucleotides, RNA). 

The main by-products of oatmeal milling are oat husks or hulls, oat dust and meal seeds.The hulls form the main by-product, about 70 per cent of the total, and the commercial product consists of the true husks with a variable proportion, up to 10 per cent, of kernel material. Oat hulls are of very low feeding value, being little better than oat straw. Their crude protein content is so low (about 30 g/kg DM) that in digestibility studies negative digestibility coefficients for nitrogen are likely... 

Mauron, J., Mottu, F., Bujard, E., and Egli, R.H. (1955) The availability of lysine, methionine and tryptophane in condensed milk and milk powder in vitro digestion studies. Arch. Biochem. Biophys. 59, 433. 

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