Life spans were found to be temperature dependent at constant temperatures of 22, 27, and 32°C, but they were divided into 'ageing' and 'dying' phases at split-temperatures. The rate of ageing, which was independent of temperatures, was the same in males whether they were transferred from...
In this study, we analysed how short term temperature fluctuation interacts with nutrient limitation in the vertical migrating Daphnia commutata. We hypothesize that short term (daily) temperature fluctuation will alleviate nutrient limitation. We c
Controlled temperature freezing was conducted after each 48-hour period, with temperatures ranging from –6 to –27°C to determine the level of root hardiness. Plants were placed in a greenhouse environment to observe post-stress performance. was the most cold hardy, followed and . In general,...
(FP),and the water,fat,protein,and carbohydrate contents of the adults after FTR treatments.Compared with that at constant temperature(20 ℃),the cold tolerance of the adults at 4 ℃ 22 h/20 ℃ 2 h and 4 ℃ 46 h/20 ℃ 2 h after 1 week enhanced significantly.The SCP and FP after...
Fluctuating cholesterol and triglyceride levels in older adults are associated with a greater risk ofAlzheimer's disease(AD) and Alzheimer's-related dementia (ADRD), a new study suggests. Participants with the greatest variability in total cholesterol levels had a 19% increased risk for AD or ADR...
between homeotherms and poikilotherms (see also the aforementioned meta-analysis by Vøllestad et al., 1999) may thus be merely a methodological artefact rather than a biological phenomenon caused by the more homogeneous developmental environment owing to a more constant body temperature in home...
There were 35 fistulas, all in adults. Sin... JW House,FM Rizer - 《Am J Otol》 被引量: 20发表: 1989年 Kinetics of molecular transitions with dynamic disorder in single-molecule pulling experiments Macromolecular transitions are subject to large fluctuations of rate constant, termed as dynamic...
Most studies of temperature effect address constant thermal regime (CTR), whereas organisms are exposed to fluctuating thermal regime (FTR) in their natural environ- ments. In addition, previous works have predominantly addressed issues of thermal tolerance in adults rather than in early life stages....
Under an FTR of 11°C (22h)/20°C (2h) (average 11.8°C) survival of females drastically increased compared to that at a constant temperature of 12°C, whereas the survival of males increased slightly. Survival under FTRs indicates that adult B. latifrons may not overwinter in the north...
Life table statistics varied among temperature regimes when time was expressed in days, but converged when time was expressed in degree-days (DD). Stable instar distributions varied on a DD scale. The proportion of immatures increased and the proportion of adults decreased with increasing temperature...