The beneficial acclimation hypothesis (BAH) predicts that animals acclimated to a particular temperature have enhanced performance or fitness at that temperature in comparison with animals acclimated to other temperat...The beneficial acclimation hypothesis (BAH) predicts that animals acclimated to a particular temperature have enhanced performance or fitness at that temperature in comparison with animals acclimated to other temperatures. The BAH has been tested by a variety of empirical examinations, and was rejected by some of them. In order to provide new evidences for the BAH, the effects of acute and acclimation temperature (AT) on locomotor performance of Macrobiotus hufelandi (Tardigrada: Macrobiotidae) were investigated. The tardigrades were collected from Nanwutai, Qinling Mountains which traverse from west to east in central China. The subjects were acclimated to either 2℃ or 22℃ for 2 weeks. The animal was transferred onto a frosted slide and allowed to walk freely at the performance temperature (PT) 2℃ or 22℃. Only one individual was tested per test bout, which lasted from three to five minutes. To avoid occurrence of thermal acclimation effect, the standard adaptation time was limited to 1.5 min. Each subject was tested for once at the same PT, and was tested only at one PT. A total of 25 individuals were tested and measured at the same PT. The locomotor performance of the animals was recorded with a digital video camera mounted on a microscope at 4×10 amplification and replayed on a PC. Every subject was identified. Walking speed (WS) and percentage of time moving (PTM) at both PTs (2℃ or 22℃) were selected as the rate parameters of locomotor performance. The two-way repeated measures ANOVA with a significance level of α= 0.05 and Duncan multiple range test were used to analyze the data. WS of the animals acclimated to and tested at the same temperatures was significantly faster than that for animals acclimated to and tested at the different temperatures, similarly, PTM of the animals acclimated to 22℃ and tested at 22℃ was significantly greater than PTM of animals acclimated to 22℃ and tested at 2℃, which indicated that the animals acclimated to a particular temperature have enhanced locomoto展开更多
对2020版OEKO-TEX Standard 100进行了详细解读,列出了新增测试项目,主要包括2种重金属、9种杀虫剂、9种其他残余化学物、1种禁用阻燃产品、30种氯化苯和氯化甲苯类物质、1种残余表面活性剂、1种亚硝基物质等,并对附录4和附录6中限量值...对2020版OEKO-TEX Standard 100进行了详细解读,列出了新增测试项目,主要包括2种重金属、9种杀虫剂、9种其他残余化学物、1种禁用阻燃产品、30种氯化苯和氯化甲苯类物质、1种残余表面活性剂、1种亚硝基物质等,并对附录4和附录6中限量值的新规定进行了说明。研究结果可以方便相关技术人员更好地理解并掌握最新标准,对纺织品领域的生产与研究具有一定的指导意义。展开更多
比较了OEKO-TEX~? Standard 100 2019版与2018版之间的差异,列出了新增的2种可萃取重金属、1种杀虫剂、2类其它残余化学物、4种禁用染料、2种阻燃产品、3种硅氧烷、14种亚硝胺和亚硝基物质以及1种邻苯二甲酸酯。在2019版标准的附录6中,...比较了OEKO-TEX~? Standard 100 2019版与2018版之间的差异,列出了新增的2种可萃取重金属、1种杀虫剂、2类其它残余化学物、4种禁用染料、2种阻燃产品、3种硅氧烷、14种亚硝胺和亚硝基物质以及1种邻苯二甲酸酯。在2019版标准的附录6中,缩紧了对邻苯二甲酸酯、残余表面活性剂/润湿剂以及全氟和多氟化合物限量值,对产品的质量安全要求更高。希望研究可以为纺织品领域的相关人员在控制产品质量安全方面提供帮助。展开更多
文摘The beneficial acclimation hypothesis (BAH) predicts that animals acclimated to a particular temperature have enhanced performance or fitness at that temperature in comparison with animals acclimated to other temperatures. The BAH has been tested by a variety of empirical examinations, and was rejected by some of them. In order to provide new evidences for the BAH, the effects of acute and acclimation temperature (AT) on locomotor performance of Macrobiotus hufelandi (Tardigrada: Macrobiotidae) were investigated. The tardigrades were collected from Nanwutai, Qinling Mountains which traverse from west to east in central China. The subjects were acclimated to either 2℃ or 22℃ for 2 weeks. The animal was transferred onto a frosted slide and allowed to walk freely at the performance temperature (PT) 2℃ or 22℃. Only one individual was tested per test bout, which lasted from three to five minutes. To avoid occurrence of thermal acclimation effect, the standard adaptation time was limited to 1.5 min. Each subject was tested for once at the same PT, and was tested only at one PT. A total of 25 individuals were tested and measured at the same PT. The locomotor performance of the animals was recorded with a digital video camera mounted on a microscope at 4×10 amplification and replayed on a PC. Every subject was identified. Walking speed (WS) and percentage of time moving (PTM) at both PTs (2℃ or 22℃) were selected as the rate parameters of locomotor performance. The two-way repeated measures ANOVA with a significance level of α= 0.05 and Duncan multiple range test were used to analyze the data. WS of the animals acclimated to and tested at the same temperatures was significantly faster than that for animals acclimated to and tested at the different temperatures, similarly, PTM of the animals acclimated to 22℃ and tested at 22℃ was significantly greater than PTM of animals acclimated to 22℃ and tested at 2℃, which indicated that the animals acclimated to a particular temperature have enhanced locomoto
文摘对2020版OEKO-TEX Standard 100进行了详细解读,列出了新增测试项目,主要包括2种重金属、9种杀虫剂、9种其他残余化学物、1种禁用阻燃产品、30种氯化苯和氯化甲苯类物质、1种残余表面活性剂、1种亚硝基物质等,并对附录4和附录6中限量值的新规定进行了说明。研究结果可以方便相关技术人员更好地理解并掌握最新标准,对纺织品领域的生产与研究具有一定的指导意义。
文摘比较了OEKO-TEX~? Standard 100 2019版与2018版之间的差异,列出了新增的2种可萃取重金属、1种杀虫剂、2类其它残余化学物、4种禁用染料、2种阻燃产品、3种硅氧烷、14种亚硝胺和亚硝基物质以及1种邻苯二甲酸酯。在2019版标准的附录6中,缩紧了对邻苯二甲酸酯、残余表面活性剂/润湿剂以及全氟和多氟化合物限量值,对产品的质量安全要求更高。希望研究可以为纺织品领域的相关人员在控制产品质量安全方面提供帮助。
