scholarly journals Factors affecting the polyphenol compounds and antiradical activity of hops: Long-term study of Czech hop varieties

2018 ◽  
Vol 64 (6) ◽  
pp. 323-330
Author(s):  
Alexandr MIKYŠKA ◽  
Tomáš VRZAL ◽  
Martin DUŠEK ◽  
Marie JURKOVÁ
Keyword(s):  
Antiradical Activity ◽  
Term Study ◽  
Polyphenol Compounds ◽  
Factors Affecting ◽  
Long Term Study

Design of a Sampling Plan for Studies on the Population Dynamics of the Diamondback Moth, Plutella maculipennis (Curt.) (Lepidoptera: Plutellidae)

1961 ◽  
Vol 93 (9) ◽  
pp. 820-831 ◽  
Author(s):  
D. G. Harcourt
Keyword(s):  
Population Dynamics ◽  
Diamondback Moth ◽  
Sampling Plan ◽  
Immature Stages ◽  
Mortality Factors ◽  
Term Study ◽  
Factors Affecting ◽  
Long Term Study ◽  
Successive Generations

In 1958, intensive studies on the population dynamics of the diamondback moth, Plutella maculipennis (Curt.), on cabbage were initiated in long-term study plots at Merivale, Ontario. The object was to construct ecological life tables (Morris and Miller, 1954) for successive generations of the insect, and, ultimately, to develop a mathematical model describing survival of field populations. This paper reports on the variation between samples of immature stages of the moth, and between some of the mortality factors affecting its abundance, and on the use of these data in designing a sampling plan with acceptable limits of precision.

Design of a Sampling Plan for Studies on the Population Dynamics of the Imported Cabbageworm, Pieris rapae (L.) (Lepidoptera: Pieridae)

1962 ◽  
Vol 94 (8) ◽  
pp. 849-859 ◽  
Author(s):  
D. G. Harcourt
Keyword(s):  
Population Dynamics ◽  
Pieris Rapae ◽  
Sampling Plan ◽  
Immature Stages ◽  
Mortality Factors ◽  
Term Study ◽  
Factors Affecting ◽  
Long Term Study ◽  
Successive Generations

In 1958, intensive studies on the population dynamics of the imported cabbageworm, Pieris rapae (L.), on cabbage were initiated in long-term study plots at Merivale, Ontario. The object was to construct ecological life tables for successive generations of the species, and ultimately, to develop mathematical models describing survival of field populations. This paper reports on the variation between samples of immature stages of the insect, and between some of the mortality factors affecting its abundance; it further illustrates the use of these data in designing a sampling plan with acceptable limits of precision.

An Adrenal Cell System Suitable for Long Term Study of Factors Affecting Steroidogenesis

1975 ◽  
Vol 53 (4) ◽  
pp. 531-539 ◽  
Author(s):  
Carman S. Price ◽  
James L. Ruse ◽  
John C. Laidlaw
Keyword(s):  
Horse Serum ◽  
Calf Serum ◽  
Cell System ◽  
Cell Suspensions ◽  
Term Study ◽  
Rat Serum ◽  
Adrenal Cell ◽  
Factors Affecting ◽  
Long Term Study

Cell suspensions of normal adult rat adrenals have been prepared by trypsinization and incubated in Ham's nutrient mixture F10 containing horse serum, fetal calf serum, and lima bean trypsin inhibitor. In most experiments culture medium was not changed during incubation. In this system the number of cells fell to 50% after 2 days, then slowly declined to 20% after 1 month of incubation. A corticosterone (B) response was seen to as little as 5 μU of ACTH per millilitre, a concentration which is within the range found in normal rat serum. With maximal stimulation (100 mU ACTH/ml) the rate of accumulation was highest during the first 24 h then slowly decreased over the following 9 days. When in separate experiments ACTH was added after various times of incubation up to 3 weeks, there was a B response which continued for as long as 1 week after the ACTH was added; the later the time at which ACTH was added the lesser was the initial B response and the longer the lag period before a substantial response occurred. In cell suspensions in medium containing 5.0 mequiv. of K+ per litre, aldosterone content increased for approximately 24 h, then showed little or no change over the next 9 days. With increased K+ concentration, aldosterone was found in greater amounts and accumulation continued for longer periods, both without and with ACTH. This adrenal cell system appears suitable for long term study of factors affecting steroidogenesis.

Quinapril for Sclerosis Failed in Long-Term Study

2007 ◽  
Vol 38 (6) ◽  
pp. 14
Author(s):  
DAMIAN MCNAMARA
Keyword(s):  
Term Study ◽  
Long Term Study
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