Now showing items 421-430 of 443
4-Methyleneglutamine synthetase: A new amide synthetase present in germinating peanuts
(Elsevier, 1983-03-16)
Enzymatic activity which catalyzes the synthesis of 4-methyleneglutamine from 4-methyleneglutamic acid + ammonia was detected in and partially purified from cotyledons of peanut seeds germinated 5 to 7 days. This activity ...
Optimal avoidance and evasion tactics in predator-prey interactions
(Elsevier, 1984-01-21)
A kinematic analysis of optimal avoidance and evasion techniques for prey is presented. The analysis is mainly directed towards piscivorous interactions but can include other aquatic and terrestrial cases. Avoidance is ...
Periodate oxidation studies in the elucidation of the structures of sialic acid containing oligosaccharides
(Elsevier, 1981-06-30)
The structures of sialo-oligosaccharide alditols as determined by 1H-NMR spectrometry together with methylation analysis did not correspond with those derived previously from quantitative periodate oxidation data alone. ...
Purification and structural studies of rabbit erythrocyte cytochrome b5
(Elsevier, 1983-09-30)
SummaryA single form of cytochrome b5 has been isolated in highly purified form from the cytosolic fraction of rabbit erythrocytes by sequential chromatography on DE-52 cellulose, Sephadex G-75, and DEAE-Sephadex A50. The ...
Cellular and molecular regulation of tumor necrosis factor-alpha production by pentoxofylline
(Elsevier, 1988-09-30)
Tumor necrosis factor-alpha (TNF), a mononuclear phagocyte (MO)-derived peptide, is increasingly being recognized for its pleomorphic immunologic effects. A number of investigations have demonstrated that lipopolysaccharide ...
Prostaglandin biosynthesis does not participate in isoproterenol-induced renin release
(Elsevier, 1984-05-07)
Rat renal slices were incubated in two different media. One was a normal K. physiological saline solution and the other a high K medium. Renin release was measured every 15 min in the presence and absence of 10-6M isoproterenol ...
The transformation of Saperda calcarata (Coleoptera: Cerambycidae) into a cellulose digester through the inclusion of fungal enzymes in its diet
(Springer-Verlag, 1986-12)
The larvae of the aspen borer, Saperda calcarata , which feed on the inner bark and sapwood of living aspen stems, are unable to digest cellulose. However, they can be transformed into cellulose digesters by adding the ...
Terminal sequences of lysosome solubilized pig liver cytochrome b5 reductase
(Elsevier, 1980-08-29)
SummaryLysosome solubilized pig liver cytochrome b5 reductase has the following twenty residues as NH2-terminal sequence: Ser-Thr-Pro-Ala-Ile-Thr-Leu-Glu-Asn-Pro-Asp-Ile-Lys-Tyr-Pro-Leu-Arg-Leu-Ile-Asp. The fragment is ...
Evolution of haplodiploidy: Models for inbred and outbred systems
(Elsevier, 1980-04)
Several new models are proposed for the evolution of haplodiploidy. Each of these models is evaluated for its ability to explain (1) special problems associated with transition to haplodiploidy from a population of ...
Regulation of LH beta subunit mRNA in the sheep pituitary gland during different feedback states of estradiol
(Elsevier, 1984-08-16)
The feedback effects of gonadal steroids on the amounts of translated luteinizing hormone (LH) beta subunit were examined using cell-free assays. These amounts were then correlated with serum and pituitary concentrations ...