Results 171 to 180 of about 1,027,081 (211)

Basic Reproduction Ratios for Almost Periodic Compartmental Epidemic Models

Journal of Dynamics and Differential Equations, 2013
The authors establish a theory for the basic reproduction ratio \(R_0\) and its computation formulae for almost periodic compartmental epidemic models. It is shown that the disease-free almost periodic solution is stable for \(R_01\). They also apply the developed theory to a patchy model with almost periodic population dispersal and disease ...
Wang, Bin-Guo, Zhao, Xiao-Qiang
openaire   +2 more sources

Genetic counseling — the postcounseling period: II. Making reproductive choices

American Journal of Medical Genetics, 1979
AbstractQualitative analysis of transcripts of follow‐up interviews with 53 parents who had had genetic counseling was undertaken to characterize the process by which childbearing decisions were made and to determine how counselees resolved the problems created by being at risk.
A, Lippman-Hand, F C, Fraser
openaire   +2 more sources

Epigenetic Influences During the Periconception Period and Assisted Reproduction

2017
The periconception period starts 6 months before conception and lasts until the tenth week of gestation. In this chapter, we will focus on epigenetic modifications to DNA and gene expression within this period and during assisted reproduction. There are two critical times during the periconception window when significant epigenetic 'reprogramming ...
Amoako, Akwasi A., Nafee, Tamer M., Ola, Bolarinde   +2 more
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Stopping Reproduction During Periods of Energy Deprivation

Science's STKE, 2005
Mandal et al. used a mitotic recombination screen to identify a mutation that gave rise to a Drosophila eye phenotype associated with loss of cells derived from those that divide during the second mitotic wave of third instar eye disc development.
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Periodic reproduction of onchocerca volvulus

Parasitology Today, 1986
H, Schulz-Key, M, Karam
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Light as a Factor in Reproductive Periodicity

Nature, 1932
IN a letter to NATURE1 I observed that the culture of diatoms in polarised light would be an interesting piece of research. Later, I placed a culture in a small tube in the path of light from a Nicol prism, and a similar tube using the same culture medium, in ordinary daylight: at night, light from the sky was admitted as in the day.
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Antarctic Asteroid Odontaster validus : Constancy of Reproductive Periodicities

Science, 1966
The fact that samples of Odontaster validus from the Balleny Islands (67°S) and Robertson Bay (71°S) closely resembled reproductively samples taken from McMurdo Sound (77°S) indicates reproductive synchrony in this species over much or all of their circumcontinental antarctic distribution.
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Reproductive maturation and diel reproductive periodicity in western Gulf of Maine haddock

2011
A new macroscopic ovarian reproductive maturity index for haddock, Melanogrammus aeglefinus L, was developed to improve field collection of reproductive stage data. The index was tested, validated and revised based on a comparison with a laboratory histological staging method.
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Reproductive hormone function: The perimenopausal period and beyond

Clinics in Endocrinology and Metabolism, 1978
S G, Korenman, B M, Sherman, J C, Korenman   +2 more
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Effectiveness of Covid-19 Vaccines over a 9-Month Period in North Carolina

New England Journal of Medicine, 2022
Yu Gu, Donglin Zeng
exaly