Results 271 to 280 of about 3,093,337 (313)
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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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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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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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A test of the unified neutral theory of biodiversity
Nature, 2003One of the fundamental questions of ecology is what controls biodiversity. Recent theory suggests that biodiversity is controlled predominantly by neutral drift of species abundances. This theory has generated considerable controversy, because it claims that many mechanisms that have long been studied by ecologists (such as niches) have little ...
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Virus Neutralization Test in a Capillary Tube
Science, 1962A simple and accurate virus titration method which requires extremely low numbers of cells per test vessel is described. Inhibition of metabolism was the criterion for 50 percent end point analysis when capillary tubing was used as the cell culture container. Virus neutralization titers were obtained within 24 hours.
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Interpreters at War: Testing Boundaries of Neutrality
2019This chapter aims to explore the distinctive attitudes and narratives of interpreters in conflict zones, whose role is no longer seen as a fixed notion as they adjust their positioning along a spectrum from invisibility to advocacy. In this context, we will explore the extent to which institutional and professional boundaries have been challenged, and ...
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Adaptations of neutrality tests [PDF]
, 2018 Most of the genetic variation observed within a biological species is generally thought to be evolutionary “neutral” in the sense that it is irrelevant for an individuum whether its genome contains one particular variant or another. Evolutionary biologists, and in the case of the human species anthropologists and medical scientists as well, are by ...
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Transmission, infectivity, and neutralization of a spike L452R SARS-CoV-2 variant
Cell, 2021Raul Andino +2 more
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A Zika virus-specific IgM elicited in pregnancy exhibits ultrapotent neutralization
Cell, 2022Josh A Eudailey +2 more
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