نتایج جستجو برای: temperature elevation
تعداد نتایج: 518976 فیلتر نتایج به سال:
To determine the involvement of corticotropin releasing factor (CRF) in exercise-induced elevation in core temperature of female rats, CRF antibody or vehicle was injected intracerebroventricularly (ICV) into rats that had free access to exercise wheels for 6 weeks. On the day of injection, there were no differences in body temperature or activity following these injections. However, exercising...
Production of high quality seeds is of fundamental importance for successful crop production. However, knowledge of the effects of increased temperature resulting from global warming on seed quality of alpine species is limited. We investigated the effect of maternal environment on seed quality of three cultivars of the leguminous forage species Vicia sativa, giving particular attention to temp...
We examined abundance and flight periodicity of five Ips and six Dendroctonus species (Coleoptera: Curculionidae, Scolytinae) among three different elevation bands in ponderosa pine (Pinus ponderosa Douglas ex. Lawson) forests of northcentral Arizona. Bark beetle populations were monitored at 10 sites in each of three elevation bands (low: 1,600-1,736 m; middle: 2,058-2,230 m; high: 2,505-2,651...
The objective of this study was to characterize the temporal and altitudinal variation in microclimate of high elevation spruce–fir (Picea rubens–Abies balsamea) forests in three major mountain ranges of the northeastern United States. Mean lapse rates of air temperature were comparable to those previously reported for this region, but lapse rates varied considerably in relation to diurnal (and...
Circadian rhythms, which are found in most eukaryotes, are defined as rhythms that persist under constant conditions with a periodicity close to 24 h. One central key characteristic of all circadian rhythms is "temperature compensation", which allows organisms to maintain robust rhythms with a period close to a diel cycle over a broad range of physiological temperatures. To better understand th...
purpose: to determine the sensitivity and specificity of posterior corneal elevation in discriminating keratoconus and subclinical keratoconus from normal corneas by galilei and orbscan ii diagnosed on the basis of topography. methods: three groups (keratoconus, subclinical keratoconus and normal) were evaluated with galilei and orbscan ii and results were compared to those obtained by gold sta...
Sparse climatic observations represent a major challenge for hydrological modeling of mountain catchments with implications for decision-making in water resources management. Employing elevation bands in the Soil and Water Assessment Tool-Sequential Uncertainty Fitting (SWAT2012-SUFI2) model enabled representation of precipitation and temperature variation with altitude in the Daning river catc...
In order to assess the impact of natural and anthropogenic stresses on forest ecosystems, it is necessary to interpolate air temperature and tropospheric ozone (O3) exposure values at high spatial resolution over complex terrain. The proposed interpolation approach was selected because of its ability to (1) account for the effect of elevation on temperature and their effects on tropospheric ozo...
Energy, exergy and exergoeconomic (3E) evaluation are performed to assess the performance of a NH3/H2O cycle integrated with parabolic trough solar collectors (PTSC). To provide continuous electricity produced by generator when solar beam radiation is insufficient a stabilizer temperature subsystem is utilized. The major thermodynamic parameters and climate conditions variations are selected to...
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