Some birds are just instantly recognisable. From elegant flamingos with graceful necks to toco toucans (Ramphastos toco) their jet-black plumage and distinctive beaks, some stand out from the dowdy crowd. And toucan's outsized beak comes in handy for retrieving fruit cracking nuts. But Glenn Tattersall Brock University, Canada, explains that outrageous bill also doubles as a radiator; he recall...

Housing temperature has been shown to influence thermoregulation and behavior of preclinical cancer models; and anti-cancer drugs typically reduce peripheral blood flow and body temperature. In the present study, the effects of paclitaxel (PTX)-induced reduction of body temperature and peripheral blood flow on metastatic 4T1 breast cancer was investigated in a mouse model and the modification o...

Ventilatory parameters of mute swans were measured at thermoneutral conditions and during heat stress. Deep body temperature increased from 39.5 to 41.1 degrees C. Breathing frequency increased 29 times, compared to the thermoneutral condition. Tidal volume decreased to 18% of the pre-panting value, and the total ventilatory volume increased by 5.4 times. End-tidal PCO2 and PO2 values decreased...

Nitrogen hydrides are at the root of the nitrogen chemistry in interstellar space. The detailed modeling of their gas phase formation, however, requires the knowledge of nuclear-spin branching ratios for chemical reactions involving multiprotonated species. We investigate in this work the nuclear-spin selection rules in both exothermic and near thermoneutral ion–molecule reactions involved in t...

Passive mild heat acclimation (PMHA) reflects realistic temperature challenges encountered in everyday life. Active heat acclimation, combining heat exposure and exercise, influences several important thermophysiological parameters; for example, it decreases core temperature and enhances heat exchange via the skin. However, it is unclear whether PMHA elicits comparable adaptations. Therefore, t...

the study was conducted to evaluate the effect of thermal stress on expression profile of genes related to apoptosis in peripartum sahiwal cows. for this, twelve pregnant dry sahiwal cows were selected from livestock research centre at national dairy research institute, karnal. the cows were divided into two groups consisting of six sahiwal cows each. cows of group i calved during thermoneutral...

The study was conducted to evaluate the effect of thermal stress on expression profile of genes related to apoptosis in peripartum Sahiwal cows. For this, twelve pregnant dry Sahiwal cows were selected from Livestock Research Centre at National Dairy Research Institute, Karnal. The cows were divided into two groups consisting of six Sahiwal cows each. Cows of group I calved during thermoneutral...