Islet transplantation has been demonstrated to be able to cure diabetes caused by the loss of functional pancreatic b cells;however, it is severely limited by the shortage of cadaveric islet donor(1)Human pluripotent ...Islet transplantation has been demonstrated to be able to cure diabetes caused by the loss of functional pancreatic b cells;however, it is severely limited by the shortage of cadaveric islet donor(1)Human pluripotent stem cell, including embryonic stem cell(ESC) and induced pluripotent stem cell (iPSC), is the most promising source of replaceable functional cells because of the capacity of self-renewal and multiple lineage differentiation, thus b cell differentiation from stem cell attracts much efforts from both academic and industrial communities [2].展开更多
The intramolecular process of Mg ( Ⅱ ) - , Sc ( Ⅲ ) - , Y ( Ⅲ ) - , In(Ⅲ)-and Pb ( Ⅱ )-trans-1,2-cyclohexanediaminetetraacetic acid (CyDTA) complexes was studied by the method of proton dynamic NMR(DNMR). The top...The intramolecular process of Mg ( Ⅱ ) - , Sc ( Ⅲ ) - , Y ( Ⅲ ) - , In(Ⅲ)-and Pb ( Ⅱ )-trans-1,2-cyclohexanediaminetetraacetic acid (CyDTA) complexes was studied by the method of proton dynamic NMR(DNMR). The top limit of. the experimental temperature range of deuterium oxide solutions was extended from 100℃ to 167 ℃ instead of the previous 100 ℃ by using sealed, thick-walled tubes to observe experimental phenomena further. It was found that another intramolecular process, i. e. B, R (Bonded State, Rotational State) conversion, exists in these complexes formed by polyaminepolycarboxylic ligands in addition to △,A conversion and nitrogen inversion. A quantitative treatment was proposed to estimate the relative populations of acetate groups in B and R states.展开更多
[目的]明确20%灭蝇胺·噻虫胺悬浮剂不同剂量对韭菜迟眼蕈蚊幼虫的防治效果,为药剂生产及田间应用提供科学依据。[方法]采用灌根法测定不同剂量20%灭蝇胺·噻虫胺悬浮剂对韭蛆的田间防效。[结果]对韭菜灌根1次,14 d后各处理的20...[目的]明确20%灭蝇胺·噻虫胺悬浮剂不同剂量对韭菜迟眼蕈蚊幼虫的防治效果,为药剂生产及田间应用提供科学依据。[方法]采用灌根法测定不同剂量20%灭蝇胺·噻虫胺悬浮剂对韭蛆的田间防效。[结果]对韭菜灌根1次,14 d后各处理的20%灭蝇胺·噻虫胺悬浮剂900、1350、1800 g a.i./hm^2对韭菜迟眼蕈蚊幼虫的防效均达90%以上。[结论]20%灭蝇胺·噻虫胺悬浮剂900~1800 g a.i./hm^2的对韭蛆防效好,建议推广使用。展开更多
基金supported by the National Natural Science Foundation of China (91740102)the Fundamental Research Funds for the Central Universities
文摘Islet transplantation has been demonstrated to be able to cure diabetes caused by the loss of functional pancreatic b cells;however, it is severely limited by the shortage of cadaveric islet donor(1)Human pluripotent stem cell, including embryonic stem cell(ESC) and induced pluripotent stem cell (iPSC), is the most promising source of replaceable functional cells because of the capacity of self-renewal and multiple lineage differentiation, thus b cell differentiation from stem cell attracts much efforts from both academic and industrial communities [2].
基金Supported by the National Natural Science Foundation of China
文摘The intramolecular process of Mg ( Ⅱ ) - , Sc ( Ⅲ ) - , Y ( Ⅲ ) - , In(Ⅲ)-and Pb ( Ⅱ )-trans-1,2-cyclohexanediaminetetraacetic acid (CyDTA) complexes was studied by the method of proton dynamic NMR(DNMR). The top limit of. the experimental temperature range of deuterium oxide solutions was extended from 100℃ to 167 ℃ instead of the previous 100 ℃ by using sealed, thick-walled tubes to observe experimental phenomena further. It was found that another intramolecular process, i. e. B, R (Bonded State, Rotational State) conversion, exists in these complexes formed by polyaminepolycarboxylic ligands in addition to △,A conversion and nitrogen inversion. A quantitative treatment was proposed to estimate the relative populations of acetate groups in B and R states.
文摘[目的]明确20%灭蝇胺·噻虫胺悬浮剂不同剂量对韭菜迟眼蕈蚊幼虫的防治效果,为药剂生产及田间应用提供科学依据。[方法]采用灌根法测定不同剂量20%灭蝇胺·噻虫胺悬浮剂对韭蛆的田间防效。[结果]对韭菜灌根1次,14 d后各处理的20%灭蝇胺·噻虫胺悬浮剂900、1350、1800 g a.i./hm^2对韭菜迟眼蕈蚊幼虫的防效均达90%以上。[结论]20%灭蝇胺·噻虫胺悬浮剂900~1800 g a.i./hm^2的对韭蛆防效好,建议推广使用。
