Now showing items 31-40 of 50865
Temperature-dependent regulation of induction into secondary dormancy of Polygonum aviculare L. seeds: A quantitative analysis
(Elsevier Science, 2017-05)
In seeds of many summer annuals low temperatures under moist conditions provoke dormancy release while high temperatures induce secondary dormancy. Seed dormancy level establishes the range of temperatures under which ...
Effect of ambient temperature and thyroid hormones on food intake by pigs
Food intake and plasma thyroid hormone levels (T4 and T3) were higher in pigs acclimated to cold (12°) than hot (32°) environments. The exposure of cold pigs to hot ambient temperature decreased food intake and plasma T4 ...
A cautionary note on the computation of daily mean temperatures and their trends
(John Wiley & Sons Ltd, 2017-07)
There are different methodologies to compute daily mean temperatures (DMT), including averaging the 24-hourly temperature values, readings at specific times throughout the day or simply averaging the minimum and maximum ...
Design of a CMOS voltage reference using current-model approach
A voltage reference with low sensibility to temperature and power-supply that can generate flexible reference values (from milivolts to several volts) is proposed. Designed for AMS 0.35μm CMOS process, the circuit provides ...
Kinetics of low-temperature CO oxidation on Au(111)
(Elsevier Science, 2015-12-22)
The oxidation of carbon monoxide on oxygen-modified Au(111) surfaces is studied using a combination of reflection-absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD). TPD reveals that CO ...
Effect of breeder age on eggshell thickness, surface temperature, hatchability and chick weigh
(Fundação APINCO de Ciência e Tecnologia Avícolas, 2014)
Circadian and seasonal variation of the body temperature of sheep in a tropical environment.
Nychthemeral and annual rhythms of the rectal temperature were determined for Corriedale sheep in a tropical climate. The minimum rectal temperature averaged 39.55 degrees C at 0500 hours in summer, and 38.87 degrees C at ...
Dielectric properties of Pb Nb2 O6 ferroelectric ceramics at cryogenic temperatures
Complex dielectric permittivity measurements in Pb Nb2 O6 ceramics were performed in a frequency and temperature range of 1 kHz-1 MHz and from 15 to 900 K, respectively. The results revealed two dielectric anomalies showing ...
Influence of temperature on the release of plasminogen activator.
Fibrinolysis is a basic defense mechanism of the organism designed to control the deposition of fibrin in the vascular system and elsewhere. Fibrinolytic activity was measured by the fibrin plate method for three groups ...