Objective The production of coal fines is very common in the development of coalbed methane（CBM）in the eastern margin of the Ordos Basin,China.A large amount of produced coal fines seriously affect the productivity ...Objective The production of coal fines is very common in the development of coalbed methane（CBM）in the eastern margin of the Ordos Basin,China.A large amount of produced coal fines seriously affect the productivity of CBM wells（Wei Yingchun et al.,2013）.Therefore,the production problems of CBM wells caused by coal fines have attracted extensive attention.展开更多
目的探讨早产儿的小肌肉发展能力特点,为早产儿的精细动作发育提供针对性的训练依据。方法收集2016年4—11月在南京医科大学附属妇产医院随访体检的早产儿86例,应用《香港学前儿童小肌肉发展评估》工具(Hong Kong preschool fine motor ...目的探讨早产儿的小肌肉发展能力特点,为早产儿的精细动作发育提供针对性的训练依据。方法收集2016年4—11月在南京医科大学附属妇产医院随访体检的早产儿86例,应用《香港学前儿童小肌肉发展评估》工具(Hong Kong preschool fine motor developmental assessment,HK-PFMDA)进行小肌肉发展能力评估。结果小肌肉发展能力良好0人(占0.0%),普通36人(占37.2%),稍弱10人(占9.3%),非常弱40人(占53.5%)。结论早产儿的小肌肉发展能力较同龄正常儿有明显的差距,应关注早产儿小肌肉发展,及时筛查,早期发现、早期干预,提升其动手操作能力,促进早产儿全面发展。展开更多
Disparity in the root morphology of six rice(Oryza sativa L.) genotypes varying in potassium(K) efficiency was studied with three K levels:5 mg/L(low),10 mg/L(moderate) and 40 mg/L(adequate) in hydroponic culture. Mor...Disparity in the root morphology of six rice(Oryza sativa L.) genotypes varying in potassium(K) efficiency was studied with three K levels:5 mg/L(low),10 mg/L(moderate) and 40 mg/L(adequate) in hydroponic culture. Morphological parameters included root length,surface area,volume and count of lateral roots,as well as fine(diameter<0.2 mm) and thick(diameter>0.2 mm) roots. The results indicate that the root growth of all genotypes was reduced under low K,but moderate K deficiency increased the root length of the efficient genotypes. At deficient and moderate K levels,all the efficient rice genotypes developed more fine roots(diameter<0.2 mm) than the inefficient ones. Both fine root count and root surface area were found to be the best parameters to portray K stress in rice. In accordance with the root morphology,higher K concentrations were noted in shoots of the efficient genotypes when grown at moderate and deficient K levels,indicating that root morphology parameters are involved in root uptake for K and in the translocation of K up to shoots. K deficiency affected not only the root morphology,but also the root ultra-structure. The roots of high-efficient genotypes had stronger tolerance to K deficient stress for root membrane damage,and could maintain the developed root architecture to adapt to the low K growth medium.展开更多
基金financially supported by the National Natural Science Foundation of China(grants No.41402134 and 41272181)
文摘Objective The production of coal fines is very common in the development of coalbed methane（CBM）in the eastern margin of the Ordos Basin,China.A large amount of produced coal fines seriously affect the productivity of CBM wells（Wei Yingchun et al.,2013）.Therefore,the production problems of CBM wells caused by coal fines have attracted extensive attention.
文摘目的探讨早产儿的小肌肉发展能力特点,为早产儿的精细动作发育提供针对性的训练依据。方法收集2016年4—11月在南京医科大学附属妇产医院随访体检的早产儿86例,应用《香港学前儿童小肌肉发展评估》工具(Hong Kong preschool fine motor developmental assessment,HK-PFMDA)进行小肌肉发展能力评估。结果小肌肉发展能力良好0人(占0.0%),普通36人(占37.2%),稍弱10人(占9.3%),非常弱40人(占53.5%)。结论早产儿的小肌肉发展能力较同龄正常儿有明显的差距,应关注早产儿小肌肉发展,及时筛查,早期发现、早期干预,提升其动手操作能力,促进早产儿全面发展。
基金Project supported by the Program for Changjiang Scholars andInnovative Research Team in University of China (No. IRT0536)the National Basic Research Program (973) of China (No. 30740011)
文摘Disparity in the root morphology of six rice(Oryza sativa L.) genotypes varying in potassium(K) efficiency was studied with three K levels:5 mg/L(low),10 mg/L(moderate) and 40 mg/L(adequate) in hydroponic culture. Morphological parameters included root length,surface area,volume and count of lateral roots,as well as fine(diameter<0.2 mm) and thick(diameter>0.2 mm) roots. The results indicate that the root growth of all genotypes was reduced under low K,but moderate K deficiency increased the root length of the efficient genotypes. At deficient and moderate K levels,all the efficient rice genotypes developed more fine roots(diameter<0.2 mm) than the inefficient ones. Both fine root count and root surface area were found to be the best parameters to portray K stress in rice. In accordance with the root morphology,higher K concentrations were noted in shoots of the efficient genotypes when grown at moderate and deficient K levels,indicating that root morphology parameters are involved in root uptake for K and in the translocation of K up to shoots. K deficiency affected not only the root morphology,but also the root ultra-structure. The roots of high-efficient genotypes had stronger tolerance to K deficient stress for root membrane damage,and could maintain the developed root architecture to adapt to the low K growth medium.
