Showing papers by "University of Los Andes published in 1975"
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TL;DR: The predator‐prey interactions between the protozoan Tetrahymena pyriformis and the bacterium Aerobacter aerogenes have been studied experimentally and mathematically and a mathematical model for the ciliates defines the mass distribution of cells within the population.
Abstract: The predator-prey interactions between the protozoan Tetrahymena pyriformis and the bacterium Aerobacter aerogenes have been studied experimentally and mathematically. A mathematical model for the ciliates defines the mass distribution of cells within the population. The resulting model equations are solved by the use of multigroup theory. Experimental data from batch and continuous flow rectors are compared with the results of the numerical integration.
13 citations
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TL;DR: In this article, an analysis of the bulge height and pressure at instability of short thin cylinders subjected to internal pressure and clamped so as to maintain constant total length, such that the axial pressure forces are carried by the clamps.
7 citations
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TL;DR: In this paper, a parametrization for the matrix, set up on the states of an open (nuclear or atomic) shell, of any two-body interaction expandable in multipoles is investigated.
Abstract: The aim of this paper is to investigate a new parametrization for the matrix, set up on the states of an open (nuclear or atomic) shell, of any two-body interaction expandable in multipoles. Such a parametrization is particularly convenient for expressing the term energies in a simple form and for producing high degeneracies among the terms. Further, the parametrization considered allows the two-body interaction to be decomposed into a Dirac interaction and a remaining part.
4 citations
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TL;DR: The structure of andesgenin, a new steroid sapogenin isolated from Solanum hypomalacophyllum, was determined on the basis of spectral data and experimental results.
3 citations
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TL;DR: A mixture of n -alkanes, four pentacyclic triterpenes, and the butyrate of germanicol were isolated and their structures established.
3 citations
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TL;DR: In this paper, the authors investigated the kinetics of hydrogen discharge in solutions of HCl-DMSO within 10 −3 1 N HCl concentrations, in the presence of KClO 4 as supporting electrolyte.
3 citations
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TL;DR: In this paper, an improved version of Khilmi's result on escape and conditions to avoid disintegration is obtained by making an analytic approach, which is based on the theory of continuous induction, inductiveness of inequalities and α-approach.
Abstract: The celestial bodies are considered as mass-points attracting each other according to Newton's law. Khilmi (1961) obtained some sufficient conditions for the occurrence of disintegration and escape in then-body system as time tends to infinity using his theory of continuous induction, inductiveness of inequalities and α-approach. Making an analytic approach, an improved version of Khilmi's result on escape and conditions to avoid disintegration is obtained.
2 citations
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TL;DR: Contribution to the study of the neuroardiitecture of the periodontal ligament and itsfunctional significance and its functional significance.
Abstract: Summary
Contribution to the study of the neuroardiitecture of the periodontal ligament and its functional significance
In the present study particularly the specific receptors for certain sensory stimuli such as for pain, touch and pressure were studied. The vascular system is accompanied in its entirety by myelinated and nonmyelinated nerve fibers which form a kind of satellite system to the vessels.
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TL;DR: In this article, the authors investigated the kinetics of hydrogen discharge in solutions of HCl-DMSO within 10 −3 1 N HCl concentrations, in the presence of KClO 4 as supporting electrolyte.
Abstract: The kinetics of hydrogen discharge in solutions of HCl-DMSO is investigated within 10 −3 1 N HCl concentrations, in the presence of KClO 4 as supporting electrolyte. The cathodic slope is 0·120 V/decade for all solutions. The electrochemical reaction order with respect to the hydrogen ion concentration at E = −0·6 V is found to be 0·52. The stoichiometric number is practically equal to 2. The experimental activation energy is 11·2 kcal/mole. The cathodic process is interpreted with the discharge reaction as rate determining step, followed by the adatom recombination reaction.