A number of properties of temperature-sensitive mutants in murein synthesis are described. The mutants grow at 30 C but lyse at 42 C. One mutant possesses a temperature-sensitive d-alanyl-d-alanine adding enzyme, has an impaired rate of murein synthesis in vivo at both 30 and 42 C, and contains elevated levels of uridine diphosphate-N-acetyl-muramyl-tripeptide (UDP-MurNAc-l-Ala-d-Glu-m-diaminop...

We determined the effects of atmospheric temperature (10-30 ± 2°C in 5°C increments) and carbon dioxide (CO2) levels (400 ± 50 ppm, 540 ± 50 ppm, and 940 ± 50 ppm) on the infection of Solanum tuberosum cv. Chubaek by Potato leafroll virus (PLRV). Below CO2 levels of 400 ± 50 ppm, the PLRV infection rate and RNA content in plant tissues increased as the temperature increased to 20 ± 2°C, but dec...

OBJECTIVE Mice are typically housed at environmental temperatures below thermoneutrality, whereas humans live near thermoneutrality. This difference affects energy physiology and, potentially, anti-obesity drug efficacy. Here β3-adrenergic agonist treatment at thermoneutrality (30°C) versus room temperature (22°C) is compared. METHODS Male C57BL/6J mice were singly housed at 30°C or 22°C and ...

The temperature characteristic of respiration of Azotobacter vinelandii possesses a constant value of 19,330 +/- 165 over the temperature range 20-30 degrees C. This value is independent of pH, oxygen tension, age of culture, and other factors within the limits studied. The optimum temperature of respiration is 34-35 degrees C., with limits at about 10 degrees and 50 degrees C.

Insecticides are the most common strategy used for the management of mosquitoes. Changes in ambient temperature can alter the toxicity of insecticides to ectothermic organisms. Studies show organophosphate insecticides exhibit a positive correlation between ambient temperature and mortality for many insect species, and carbamate insecticides exhibit a slightly negative correlation between ambie...

The effectiveness of hand immersion in water at 10 degrees C, 20 degrees C and 30 degrees C as a technique for reducing heat strain in Royal Navy (RN) personnel has been investigated at the Institute of Naval Medicine (INM). Four subjects exercised at a moderate work rate, whilst wearing fire fighting clothing in an environmental chamber at 40 degrees C. The subjects reached heat strain safety ...

INTRODUCTION Different factors related to winter are known to influence the fracture incidence, but little is known about the effect of road surface temperature. This study examines the association between road surface temperature and the daily number of fractures in an urban area during two winters. MATERIAL AND METHODS Retrospective data collection was conducted on all patients treated at B...

We incubated eggs of Elaphe taeniura at 22, 24, 27, 30 and 32°C to examine the effects of incubation temperature on hatching success, embryonic use of energy and hatchling morphology. Incubation temperature affected incubation length and most hatchling traits examined in this study. Incubation length increased nonlinearly as temperature decreased, with the mean incubation length being 101.7 d a...

Temperature caused phenomenal modulation of phosphoenolpyruvate carboxylase (PEPC, EC 4.1.1.31) in leaf discs of Amaranthus hypochondriacus (NAD-ME type C(4) species), compared to the pattern in Pisum sativum (a C(3) plant). The optimal incubation temperature for PEPC in A. hypochondriacus (C(4)) was 45 degrees C compared to 30 degrees C in P. sativum (C(3)). A. hypochondriacus (C(4)) lost near...