Now showing items 21-30 of 33
Annual variation in Finch numbers, foraging and food supply on Isla Daphne Major, Galápagos
(Springer-Verlag, 1980-07)
(1) We report some effects of an annually variable and unpredictable rainfall upon Darwin's Finches on the Galápagos. Finch numbers, foraging and food supply were studied on I. Daphne Major in December of 1973 and 1977, ...
Characterization of human lymphocyte N -acetyltransferase and its relationship to the isoniazid acetylator polymorphism
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1980-10)
Characterization of human lymphocyte N -acetyltransferase (NAT) for specific activity, substrate specificity, inhibition, pH optimum, apparent K m , kinetic mechanism, trypsin stability, freezing stability, and heat stability ...
Effect of manganese on the nuclear magnetic relaxivity of water protons in chloroplast suspensions
(Elsevier, 1980-04-14)
Field dispersion profiles of the proton spin-lattice relaxation rate, T1-1, in chloroplast suspensions show a local maximum near 20 MHz, probably due to bound Mn(II); EDTA extraction eliminates, and MnCl2 addition restores, ...
The amino acid sequence of carbonic anhydrase I from the rhesus macaque
(Elsevier, 1980-09-16)
The complete amino acid sequence of carbonic anhydrase I (CA I) isolated from the red cells of the rhesus macaque ( ) is presented. This sequence was obtained by aligning peptides derived from various fragmentation procedures ...
Low nutritive quality as defense against herbivores
(Elsevier, 1980-09-21)
Contrary to a widespread assumption in the literature on plant-herbivore interactions, individual plants do not necessarily benefit by possessing traits which lower herbivore fitness. In particular, genes conferring lowered ...
Proofreading systems of multiple stages for improved accuracy of biological discrimination
(Elsevier, 1980-07-07)
The phenomenal accuracy of biological discrimination is due in many cases to specific proofreading mechanisms. We have previously developed a macroscopic theory of such mechanisms and applied it to the case of single-stage ...
The digestion of protein and carbohydrate by the stream detritivore, Tipula abdominalis (Diptera, Tipulidae)
(Springer-Verlag, 1980-09)
The digestive system of larvae of Tipula abdominalis (Diptera, Tipulidae), a stream detritivore, is poorly adapted for the digestion of the major polysaccharides in its diet, but well adapted for the digestion of protein. ...
The UPS locus encoding uroporphyrinogen I synthase is located on human chromosome 11
(Elsevier, 1980-07-16)
The expression of the UPS locus encoding uroporphyrinogen I synthase has been investigated in human/mouse somatic cell hybrids. Human and mouse uroporphyrinogen I synthase can be readily distinguished by their isoelectric ...