نتایج جستجو برای: cold
تعداد نتایج: 105202 فیلتر نتایج به سال:
Transcriptional activation of the VERNALIZATION1 gene mediates the acceleration of flowering by prolonged cold (vernalization) in temperate cereals. This study examined the earliest stages of the transcriptional response of VRN1 to low temperatures. Time-course analyses, using a sensitive quantitative PCR assay, showed that in sprouting barley seedlings VRN1 transcripts begin to accumulate with...
BACKGROUND The purpose of this study was to evaluate the prevalence of cold sensitivity in patients with hand- and wrist-related diagnoses. METHODS We included English-speaking adults who were more than 1 month following hand injury or onset of symptoms. Patients were asked if exposure to cold air or water provoked cold-related symptoms and to rank symptom severity (scale 0-10). Statistical a...
Cold shock elicits an immediate rise in cytosolic free calcium concentration ([Ca2+]cyt) in both chilling-resistant Arabidopsis and chilling-sensitive tobacco (Nicotiana plumbaginifolia). In Arabidopsis, lanthanum or EGTA caused a partial inhibition of both cold shock [Ca2+]cyt elevation and cold-dependent kin1 gene expression. This suggested that calcium influx plays a major role in the cold s...
Hypertension can be classified into HOT and COLD in Persian medicine. In HOT hypertension, cardiac output is increased which causes an increase in heart rate or stoke volume; therefore, treated with bloodletting (cold temperament), food such as barley is recommended. In COLD hypertension, blood viscosity or arterial sympathetic tone is increased which is usually associated with mental stress wh...
Autumn daffodil (Sternbergia lutea) is one of bulbous plants from Iran that has potential as an ornamental plant. The understanding and control of dormancy and investigation of cold requirement in this plant are critical for its cultivation This research was conducted to investigate the effects of duration of cold and the size of bulb on growth, development and flowering of autumn daffodil. The...
In order to evaluate the effects of both cold and light stresses on chlorophyll fluorescence and feasibility of using chlorophyll florescence technique to evaluate effect of light intensity on cold tolerance in soybean, an experiment was done in a factorial arrangement based on a completely randomized design with three replicates. Two soybean cultivars consisted of 032 and BP grown under greenh...
Chen, Gin-Fu, and Zhongjie Sun. Effects of chronic cold exposure on the endothelin system. J Appl Physiol 100: 1719–1726, 2006. First published December 29, 2005; doi:10.1152/japplphysiol.01407.2005.— Cold temperatures have adverse effects on the human cardiovascular system. Endothelin (ET)-1 is a potent vasoconstrictor. We hypothesized that cold exposure increases ET-1 production and upregulat...
Although many studies of ectothermic vertebrates have documented compensatory changes in cold hardiness associated with changes of season, much less attention has been paid to adjustment of physiological functions and survival limits following more acute exposure to cold. We investigated the ability of hatchling painted turtles (Chrysemys picta) to increase cold hardiness in response to brief e...
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Nerve extracts containing tubulin labeled by axonal transport were analyzed by electrophoresis and differential extraction. We found that a substantial fraction of the tubulin in the axons of the retinal ganglion cell of guinea pigs is not solubilized by conventional methods for preparation of microtubules from whole brain. In two-dimensional polyacrylamide gel electrophoresis this cold-insolub...
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