Sleep is an essential behavior that is conserved in most animal species. Two molecular mechanisms regulate sleep： circadian clocks for the timing of sleep, and a homeostatic process for the amount of sleep [1]. The f...Sleep is an essential behavior that is conserved in most animal species. Two molecular mechanisms regulate sleep： circadian clocks for the timing of sleep, and a homeostatic process for the amount of sleep [1]. The fruit fly, Drosophila melanogaster, exhibits robust sleep behavior and serves as an excellent model in which to study the neuronal and molecular mechanisms of sleep.展开更多
It has been determined that siestas could potentially have both mental and physical influences on the human body.However,the effects of siestas on the nocturnal sleep quality and thermal comfort levels under thermoneu...It has been determined that siestas could potentially have both mental and physical influences on the human body.However,the effects of siestas on the nocturnal sleep quality and thermal comfort levels under thermoneutral environment had not yet been examined in detail.In order to explore the potential influences of siestas on nocturnal sleep,twenty subjects were recruited and divided into two groups based on whether they took siestas or not.During this study’s experiment,the temperature was maintained at 25°C,and sleep duration was recorded throughout the night.In addition,thermal comfort votes(TCV)and thermal satisfaction votes(TSV)were obtained both before and after the nocturnal sleep.Furthermore,dopamine(DA)levels,which played important roles in emotional regulation,were measured after the nocturnal sleep.Results showed that the siesta group had a significant increase in self-reported nocturnal sleep quality(p<0.05),although slight decreases in slow-wave sleep(SWS)duration and rapid eye movement(REM)duration were observed.Additionally,higher TCV and TSV values were reported in the siesta group(p<0.05).Higher DA concentration was also detected in the siesta group after the nocturnal sleep.Furthermore,some correlations were illustrated between the thermal voting values and the sleep duration,as well as the DA concentration levels.Results implied that siestas could have an influence on the nocturnal sleep quality and thermal comfort levels under thermoneutral environment.Besides,DA concentration levels played an important role in the thermal comfort evaluations when exploring the influences of siestas on nocturnal sleep.展开更多
The non-isothermal kinetics of mechanochemical reduction of Ag2O with graphite was studied by DSC and TGA with a model of fitting Malek approach and a model-free advanced isoconversional method of Vyazovkin. To evalua...The non-isothermal kinetics of mechanochemical reduction of Ag2O with graphite was studied by DSC and TGA with a model of fitting Malek approach and a model-free advanced isoconversional method of Vyazovkin. To evaluate the kinetics parameters, Ag2O–graphite mixture of as-received and milled for 2 and 4 h samples were selected. Based on the results obtained by Vyazovkin method calculation, however, the difference between the maximum and minimum values of activation energy is less than 20%-30%of the average activation energy （（99.38±2.36） kJ/mol） and thermal decomposition of mechanically activated Ag2O for 2 h is a multi-step process. Moreover, the thermal decomposition of mechanically activated Ag2O–graphite powder activated for 4 h is a single-step process （the average activation energy=（93.68±2.26） kJ/mol）. The kinetics modeling shows that the complexity of thermal decomposition of as-received Ag2O–graphite mixture is higher than that of the others. While, the autocatalytic tendency of as-received Ag2O–graphite mixture is lower than that of the others.展开更多
文摘Sleep is an essential behavior that is conserved in most animal species. Two molecular mechanisms regulate sleep： circadian clocks for the timing of sleep, and a homeostatic process for the amount of sleep [1]. The fruit fly, Drosophila melanogaster, exhibits robust sleep behavior and serves as an excellent model in which to study the neuronal and molecular mechanisms of sleep.
基金supported by the National Natural Science Foundation of China with contract numbers of 51778305the Shandong Provincial Natural Science Foundation with contract numbers of ZR2022ME148.
文摘It has been determined that siestas could potentially have both mental and physical influences on the human body.However,the effects of siestas on the nocturnal sleep quality and thermal comfort levels under thermoneutral environment had not yet been examined in detail.In order to explore the potential influences of siestas on nocturnal sleep,twenty subjects were recruited and divided into two groups based on whether they took siestas or not.During this study’s experiment,the temperature was maintained at 25°C,and sleep duration was recorded throughout the night.In addition,thermal comfort votes(TCV)and thermal satisfaction votes(TSV)were obtained both before and after the nocturnal sleep.Furthermore,dopamine(DA)levels,which played important roles in emotional regulation,were measured after the nocturnal sleep.Results showed that the siesta group had a significant increase in self-reported nocturnal sleep quality(p<0.05),although slight decreases in slow-wave sleep(SWS)duration and rapid eye movement(REM)duration were observed.Additionally,higher TCV and TSV values were reported in the siesta group(p<0.05).Higher DA concentration was also detected in the siesta group after the nocturnal sleep.Furthermore,some correlations were illustrated between the thermal voting values and the sleep duration,as well as the DA concentration levels.Results implied that siestas could have an influence on the nocturnal sleep quality and thermal comfort levels under thermoneutral environment.Besides,DA concentration levels played an important role in the thermal comfort evaluations when exploring the influences of siestas on nocturnal sleep.
文摘The non-isothermal kinetics of mechanochemical reduction of Ag2O with graphite was studied by DSC and TGA with a model of fitting Malek approach and a model-free advanced isoconversional method of Vyazovkin. To evaluate the kinetics parameters, Ag2O–graphite mixture of as-received and milled for 2 and 4 h samples were selected. Based on the results obtained by Vyazovkin method calculation, however, the difference between the maximum and minimum values of activation energy is less than 20%-30%of the average activation energy （（99.38±2.36） kJ/mol） and thermal decomposition of mechanically activated Ag2O for 2 h is a multi-step process. Moreover, the thermal decomposition of mechanically activated Ag2O–graphite powder activated for 4 h is a single-step process （the average activation energy=（93.68±2.26） kJ/mol）. The kinetics modeling shows that the complexity of thermal decomposition of as-received Ag2O–graphite mixture is higher than that of the others. While, the autocatalytic tendency of as-received Ag2O–graphite mixture is lower than that of the others.
