Results 221 to 230 of about 75,373 (266)
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A neutral sampling formula for multiple samples and an ‘exact’ test of neutrality
Ecology Letters, 2007AbstractAs the utility of the neutral theory of biodiversity is increasingly being recognized, there is also an increasing need for proper tools to evaluate the relative importance of neutral processes (dispersal limitation and stochasticity). One of the key features of neutral theory is its close link to data: sampling formulas, giving the probability
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2013
The platelet neutralization test is used in the laboratorvy diagnosis of the lupus anticoagulant (Laffan and Manning, Dacie and Lewis practical haematology. Churchill Livingstone, Philadelphia, PA, pp 445-446, 2006). The lupus anticoagulant typically causes prolongation of phospholipid-dependent coagulation tests such as APTT, DRVVT, etc.
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The platelet neutralization test is used in the laboratorvy diagnosis of the lupus anticoagulant (Laffan and Manning, Dacie and Lewis practical haematology. Churchill Livingstone, Philadelphia, PA, pp 445-446, 2006). The lupus anticoagulant typically causes prolongation of phospholipid-dependent coagulation tests such as APTT, DRVVT, etc.
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Testing long-run neutrality [PDF]
, 1992 Propositions about long run neutrality are at the heart of most macroeconomic models. Yet, since the 1970's when Lucas and Sargent presented powerful critiques of traditional neutrality tests, empirical researchers have made little progress on testing these propositions. In this paper we show that. in spite of the Lucas-Sargent critique.
Robert King, Mark W. Watson
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Neutralization tests of a mN FEEP thruster
32nd Joint Propulsion Conference and Exhibit, 1996Neutralization of the ion beam produced by a FEEP thruster is in principle a task similar to the well-known problem of neutralizing a traditional ion rocket.On the other hand, the neutralization of a small, micronewton thrust level FEEP poses several practical problems.
GENOVESE A +3 more
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Neutralization Tests for Feline Leukemia and Sarcoma
Journal of the American Veterinary Medical Association, 1971SUMMARY Purified preparations of feline leukemia virus (FeLV, Rickard strain) and feline sarcoma virus (FeSV, Gardner strain) were used to immunize goats. The 2 kinds of antiserum produced by these animals were shown to have neutralizing antibodies against their homologous viruses by (1) infectivity tests in newborn kittens, (2) complement-fixation (cf)
J E, Post +4 more
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European Journal of Political Economy, 1989
Abstract The paper is concerned with tests for Granger causality and for cointegration between (log) money and (log) output in Germany. Augmented Dickey—Fuller tests show that only second differences of both variables are stationary and only first differences (and not levels) are cointegrated. Furthermore it is shown that there is most times feedback
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Abstract The paper is concerned with tests for Granger causality and for cointegration between (log) money and (log) output in Germany. Augmented Dickey—Fuller tests show that only second differences of both variables are stationary and only first differences (and not levels) are cointegrated. Furthermore it is shown that there is most times feedback
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Neutralization Tests with Certain Neurotropic Viruses
The Journal of Immunology, 1944Abstract The relative lack of sensitivity of intracerebral virus-neutralization tests in mice, and their consequent limitations when applied to the investigation of certain epidemiologic or immunologic problems, is generally recognized. Inasmuch as the ability to detect or quantitate neutralizing antibodies in a serum is ...
Edwin H. Lennette, Hilary Koprowski
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Standardization of Poliovirus Neutralizing Antibody Tests
Clinical Infectious Diseases, 1984Recently the Forum for Advancement of Immunization Research sponsored a Collaborative Study on Poliovirus Antibody Titration. Twenty laboratories from 12 countries participated. There were considerable differences in detail of test performance and test results among laboratories.
P, Albrecht +3 more
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Test of Selection and Neutrality in Natural Populations
Nature, 1973MORE than a century after the publication of Darwin's Origin of Species, the question of the relative contribution of selected and nonselected (“neutral”) genetic variation to evolution is still unresolved1,2.
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Comparability of poliovirus neutralizing antibody tests
Biologicals, 1992A serology panel was used to assess the comparability of results of poliovirus neutralizing antibody assays. Five laboratories from three countries provided results with seven in-house methods. A high degree of within-laboratory reproducibility was seen for all laboratories and methods, with 94% of results for repeat titrations within plus or minus one
D J, Wood, A B, Heath
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