Results 231 to 240 of about 1,272,070 (265)
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Density and Viscosity Measurements of Natural Solutions
Chemistry and Ecology, 1986Abstract Utilizing sophisticated equipment, densimetric and viscosimetric measurements were carried out on samples of ground-waters of Apulia. Experimental data, utilized to check if simple equations can evaluate the density and the viscosity of multicomponent solutions, confirm the validity of the hypothesis.
POLEMIO M. +3 more
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The relation between density regulation and natural selection
Proceedings of the Royal Society of London. Series B - Biological Sciences, 1956Abstract Darwin (1859) introduced the notion of natural selection by showing that if the density of a species is to remain steady, most of the individuals in each generation must die prematurely. Nicholson (1954) has analyzed the factors determining the density of a species in great detail. Haldane (1953) did so more summarily.
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Natural densities of Markov transition probabilities
Probability Theory and Related Fields, 1986Let \((P_ t)\), \((P^*\!_ t)\) be two measurable submarkovian semigroups on a measurable space E which are absolutely continuous and in duality with respect to a \(\sigma\)-finite measure \(\mu\). Then it is shown that there exists a unique measurable function \(p: (0,\infty)\times E\times E\to {\bar {\mathbb{R}}}_+\) satisfying \[ (i)\quad P_ tf(x ...
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Density of cellulose fibers. III. Density and refractivity of natural fibers and rayon
Journal of Polymer Science, 1946AbstractA micromethod is described for density determinations of artificial cellulose fibers by the floating method, in carbon tetrachloride in a dry and air‐free atmosphere, permitting an accuracy of one part per thousand. The density is derived from the temperature at which the samples neither sink nor float. This temperature varies, with the kind of
P. H. Hermans, J. J. Hermans, D. Vermaas
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Density of Liquefied Natural Gas Components
1978When measuring cargoes of liquefied natural gas (LNG), knowledge is required of its composition, volume, temperature, and density. It was decided in 1968 to look into the problem of determining LNG density characteristics. Rather than developing a direct-reading densimeter, work was directed toward determining density as a function of composition and ...
J. E. Orrit, J. M. Laupretre
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DENSITIES AND NATURAL INTEGRABILITY. APPLICATIONS IN PROBABILISTIC NUMBER THEORY
JP Journal of Algebra, Number Theory and Applications, 2020Summary: The objective of this work is to develop results putting the link between asymptotic and analytical densities and natural integrability. Then applications in probabilistic number theory are given.
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Prediction of the density for natural gas and liquefied natural gas mixtures
AIChE Journal, 2001AbstractExperimental liquid densities and compressibility factors of natural gas and liquefied natural gas mixtures were reproduced using an analytical equation of state, based on the statistical‐mechanical perturbation theory of Weeks, Chandler and Andersen.
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Density-dependent natural selection
Trends in Ecology & Evolution, 1989Mark A. Elgar, Carla P. Catterall
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On Density of Pairs of Natural Numbers
2015Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę.
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