Now showing items 31-40 of 49
Pólya-like urns and the Ewens' sampling formula
(Springer-Verlag, 1984-08)
A Markov process of partitions of the natural numbers is constructed by defining a Pólya-like urn model. The marginal distributions of this process are the Ewens' sampling distributions of population genetics.
Role of oxygen reactive species in egg-induced granulomatous inflammation
(Elsevier, 1984-07-18)
The role of oxygen reactive species in granulomatous hypersensitivity was explored using a model of pulmonary granulomas induced by intravenous injection of eggs from the parasite . Macrophages from sychronously developing ...
Novel inhibition of carbonic anhydrase isozymes I, II and III by carbamoyl phosphate
(Elsevier, 1984-01-09)
Carbamoyl phosphate has been shown to inhibit carbonic anhydrase (CA) isozymes CA I, CA II and CA III. This physiologically important molecule is the most potent, naturally occurring inhibitor of carbonic anhydrase yet ...
Effects of somatostin on food intake in rats
(Elsevier, 1984-08-13)
We examined the possibility that somatostatin, a tetradecapeptide distributed in the gut and the central nervous system, may influence food intake and behavior in rats. Although intravenously infused somatostatin did not ...
Beta decay and the origin of biological chirality: New experimental results
(Kluwer Academic Publishers; D. Reidel Publishing Company ; Springer Science+Business Media, 1984-12)
The proposed connection between the parity-violating handedness of beta particles in radioactive decay and the sign (L) of biological chirality (the Vester-Ulbricht [V-U] hypothesis) is being investigated by measuring the ...
Evolutionary conservation of DNA coding for maternal RNA in sea urchins
(Elsevier, 1984-08-30)
The extent of evolutionary conservation of DNA complimentary to RNA stored in the mature oocyte of the sea urchin has been assessed. To do this, such DNA was hybridized with total genomic DNA of and and the thermal ...
The kinetics and feedback inhibition of cytidine 5′-triphosphate synthetase in wild-type and mutant Chinese hamster cells
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1984-08)
The kinetics and cytidine 5′-triphosphate (CTP) feedback inhibition of CTP synthetase in wild-type and four mutants of Chinese hamster V79 cells have been studied. The enzymes of the wild type and three of the four mutants ...
Uptake of inorganic nitrogen and seaweed surface area: Volume ratios
(Elsevier, 1984-08)
Surge uptake of ammonium and nitrate by four intertidal seaweed species was examined under standard conditions (16.5 or 20[deg]C, 72 [mu]E m-2 s-1), at both subsaturating and saturating initial nutrient concentrations. ...
Acetylcholine turnover in an autoactive molluscan neuron
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1984-03)
1. We have studied acetylcholine (ACh) turnover at the cholinergic synapse between an identified motoneuron, the salivary burster (SB), and the muscle cells of the salivary duct (SD) in the terrestrial mollusk Limax maximus.
Pleiotropic mutants of Chinese hamster cells with altered cytidine 5′-triphosphate synthetase
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1984-08)
Following chemical mutagenesis and multiple-step indirect selection, four clones of Chinese hamster V79 cells were isolated which exhibited auxotrophy for thymidine, deoxycytidine, or deoxyuridine but not for cytidine or ...