Now showing items 41-50 of 392
Palearctic predator invades North American Great Lakes
(Springer-Verlag, 1987-12)
Bythotrephes cederstroemii Schoedler, a predatory freshwater zooplankter (Crustacea: Cladocera), was first found in the Laurentian Great Lakes in December 1984. The first individuals were from Lake Huron, followed in 1985 ...
Visualization of opiate receptors and opioid peptides in sequential brain sections
(Elsevier, 1982-09)
Autoradiographic and immunocytochemical studies were carried out on adjacent sections from formaldehyde-perfused rat brains in order to directly correlate the distribution of opiate receptors and opioid peptides. Perfusion ...
Regulation of insulin responsiveness in rat hepatoma cells
(Elsevier, 1980-02-12)
Insulin causes a 5 to 10-fold increase in the velocity of [alpha]-aminoisobutyric acid transport and a 2 to 3-fold increase in tyrosine aminotransferase activity in dexamethasone-treated hepatoma tissue culture cells. ...
Steric factors involved in the action of glycosidases and galactose oxidase
(Elsevier, 1981-11-16)
[alpha]-(1-->2)--Fucosidase, [beta]--galactosidase and galactose oxidase are sterically hindered by certain types of branching in the oligosaccharide chains. 1) [beta]--Galactosidase will not cleave galactose when the ...
Differences in the methylation of brain histamine between audiogenic seizure-sensitive and -resistant deermice
(Elsevier, 1981-06-22)
We have investigated the catabolism of [3H] histamine (HA), after intraventricular (i.vt.) administration, in brains of the audiogenic seizure susceptible (SS) and resistant (SR) deermouse . Brains of SS mice had lower ...
II. Biochemical mechanisms in the phosphatidylinositol effect
(Elsevier, 1983-05-02)
Stimulated labeling of phospholipids from 32Pi is a hallmark of activation of a variety of cell surface receptors. In the case of the central nervous system, the response can reflect muscarinic activation. Recent studies ...
Occurence, identification and possible significance of ornithine lipid in Thiobacillus ferrooxidans
(Elsevier, 1987-02-13)
An ornithine containing aminolipid has been found in grown in ferrous sulfate medium, which was purified and estimated at four main phases of growth. GLC analysis of ornithine lipid has revealed the existence of mainly ...
Mammalian species richness on islands on the Sunda Shelf, Southeast Asia
(Springer-Verlag, 1984-01)
A rich mammalian fauna is found on islands that lie on the Sunda Shelf, a continental shelf extending from Vietnam to Borneo and Java that was periodically exposed as dry land during the Pleistocene. The correlation between ...
Downy woodpecker foraging behavior: foraging by expectation and energy intake rate
(Springer-Verlag, 1983-05)
I describe an artificial patch system that was used to study the foraging behavior of free-roaming downy woodpeckers ( Picoides pubescens ) in a woodlot in southeastern Michigan. The artificial “patches” used were thin ...