Now showing items 41-50 of 2574
Two routes for synthesis of phosphoenolpyruvate from C4-dicarboxylic acids in
(Elsevier, 1974-08-19)
Mutants of defective in both phosphoenolpyruvate carboxykinase and phosphoenolpyruvate synthetase are unable to use C4-dicarboxylic acids such as succinate and malate as carbon and energy sources for growth. Revertants ...
Root turnover and productivity of coniferous forests
(Martinus Nijhoff/Dr. W. Junk Publishers; Martinus Nijhoff/Dr W. Junk Publishers ; Springer Science+Business Media, 1983-02)
Fine roots and mycorrhizae have recently been shown to produce a major portion of the organic matter entering decomposition. Roots and mycorrhizae constitute 63 to 70% of total net primary production in Douglas-fir and ...
The stimulation of cerebral N2-methyl- and N22-dimethyl guanine-specific tRNA methyltransferases by methionine sulfoximine: An study
(Elsevier, 1977-06-20)
The administration of a single convulsant dose or of multiple subconvulsant doses of L-methionine-dl-sulfoximine (MSO) to 18-day old rats results in a significant elevation of the specific activity of cerebral tRNA ...
Choosing category size in a stage projection matrix
(Springer-Verlag, 1978-01)
A basic problem associated with choosing category size in a stage projection matrix is described. “Errors of estimation” are large if the category size is chosen too small and “errors of distribution” are large if the ...
Preparation of Small Otoliths for Microscopic Examination
(Taylor & Francis GroupWiley Periodicals, Inc., 1987-04)
We present a method for the preparation of small otoliths that consists of mounting otoliths in thin‐section epoxy on an acetate sheet. After mounting, the otoliths can be handled easily during grinding, polishing, and ...
Comparative ultrastructural study of normal and grafted skin in the frog, Rana pipiens , with special reference to neuroepithelial connections
(Springer-Verlag, 1973-06)
Recent investigations have suggested specific differences in back and belly skin in anurans which appear to influence the quality of reflex responses obtained from various areas of the animals body. The present investigation ...
The effects of feeding on heart activity in the terrestrial slug, Limax maximus : central and peripheral control
(Springer-Verlag, 1985-07)
The role of the central nervous system (CNS) in the modulation of heart activity induced by feeding was investigated in the terrestrial slug, Limax maximus . Intact slugs and semi-intact preparations were used to examine ...
The effect of brainstem transection on blood pressure in the dog
(Elsevier, 1969-03-01)
Blood pressure was compared before and after midpontine pretrigeminal brainstem transection in the dog. Statistically significant decreases in blood pressure were observed 1/2, 1, and 1-1/2 hours after brainstem transection. ...
APPROACH BY GREAT WHITE SHARK ELICITS FLIGHT RESPONSE IN BOTTLENOSE DOLPHINS
(Blackwell Publishing Ltd, 1996-10)