Now showing items 11-20 of 32
Studies of enzyme polymorphisms in the Kamuela population of Drosophila mercatorum . II. Evaluation of glycolytic intermediates
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1982-12)
A simple and effective cryogenic procedure for the extraction of glycolytic intermediates from whole Drosophila has been developed. This procedure gives consistent results when a measure (µM/liter/OD 260 ) is adopted which ...
Discriminative stimulus, antagonist, and rate-decreasing effects of cyclorphan: Multiple modes of action
(Elsevier, 1982-01-25)
The discriminative effects of cyclorphan were studied in pigeons trained to discriminate 0.32 mg/kg ethylketazocine, 1.8 mg/kg cyclazocine, or 32 mg/kg naltrexone from saline. A fourth group of pigeons was administered 100 ...
Tannin assays in ecological studies: Lack of correlation between phenolics, proanthocyanidins and protein-precipitating constituents in mature foliage of six oak species
(Springer-Verlag, 1982-08)
There is no correlation between protein-precipitating capacity and either total phenolic or proanthocyanidin content of extracts of mature foliage from six species of oaks: Quercus alba (white oak), Q. bicolor (swamp white ...
Functional assays for mRNA detect many new messages after male meiosis in mice
(Elsevier, 1982-10-29)
We have investigated the changes occurring in the pattern of translatable mRNA species in germ cells during spermatogenesis of mice. Highly homogeneous cell populations of spermatocytes or spermatids were purified. Poly(A)+ ...
Responses of phytoplankton to experimental fertilization with ammonium and phosphate in an African soda lake
(Springer-Verlag, 1982-01)
Phytoplankton abundance in tropical lakes is more often judged to be limited by nitrogen than phosphorus, but seldom does the evidence include controlled enrichments of natural populations. In January 1980 we performed the ...
The Continuum Model: Statistical implications
(Elsevier, 1982-02-21)
The Continuum Model postulates that preparations for the initiation of DNA synthesis takes place continuously, and in all phases of the cell cycle. There are no G1-specific events involved in the initiation of DNA synthesis. ...
Tritiated ethylketocyclazocine binding in rat brain: Differential distribution of binding sites across brain regions
(Elsevier, 1982-09)
In rat brain, 3H-EKC shows a relative regional distribution of binding which parallels that of 3H-morphine. Dynorphin(1-13) has a pattern similar to morphine and dissimilar to EKC in displacing the three labels. Dynorphin(1-13) ...
Capping and mitogenesis: A model implicating microfilaments in lymphocyte activation
(Elsevier, 1982-09-07)
In lymphocytes cap formation induced by concanavalin A (con A) was found to be concentration dependent on the mitogen in the presence of colchicine, a microtubule disrupting agent. The dose-respone of cap formation under ...
Experimental and modeling studies of a four-trophic level predator-prey system
(Springer-Verlag; Springer-Verlag New York Inc., 1982-12)
Experimental studies of a microbial food chain involving organic carbon substrates, Enterobacter aerogenes , and ciliate protozoans Paramecium primaurelia and Dldinium nasutum were conducted in stirred, aerated batch ...
RNA splicing: Advantages of parallel processing
(Elsevier, 1982-10-21)
Parallel and sequential modes of RNA processing are systematically compared by an analysis of the relevant kinetic reaction schemes. The parallel mode is shown to be superior in the sense that it allows molecules to be ...