Roughened surfaces of light-emitting diodes(LEDs)provide substantial improvement in light extraction efficiency.By preparing the self-assemble nanoporous Ni template through rapid annealing of a thin Ni film,followed ...Roughened surfaces of light-emitting diodes(LEDs)provide substantial improvement in light extraction efficiency.By preparing the self-assemble nanoporous Ni template through rapid annealing of a thin Ni film,followed by a low damage dry etching process,a p-side-up LED with a roughened surface has been fabricated.Compared to a conventional LED with plane surface,the light output of LEDs with nanoporous p-GaN surface increases up to 71%and 36%at applied currents of 1 mA and 20 mA,respectively.Meanwhile,the electrical characteristics are not degraded obviously after surface roughening.展开更多
[目的]探索化学除草剂对2种中药材苦参和射干苗期杂草的防除效果及其对该2种作物的安全性。[方法]通过田间小区试验,研究40%砜吡草唑SC土壤喷雾+30%苯唑草酮SC播种后21 d茎叶喷雾,按照低(120+22.5)、中(180+27)、高(240+45)g a.i./hm^(...[目的]探索化学除草剂对2种中药材苦参和射干苗期杂草的防除效果及其对该2种作物的安全性。[方法]通过田间小区试验,研究40%砜吡草唑SC土壤喷雾+30%苯唑草酮SC播种后21 d茎叶喷雾,按照低(120+22.5)、中(180+27)、高(240+45)g a.i./hm^(2)3个剂量组合搭配,48%仲丁灵EC按照1440 g a.i./hm^(2)苗前一次性土壤喷雾的方法,施药后持续调查4种不同处理对田间杂草的株防效,以及对苦参和射干2种作物出苗和株高的影响。[结果]40%砜吡草唑SC+30%苯唑草酮SC的中(180+27)、低(120+22.5)g a.i./hm^(2)剂量处理组合在苗后茎叶处理后7~42 d,对田间杂草的株防效可维持在80%以上,且该剂量组合处理对苦参和射干的出苗和株高并无明显不利影响。[结论]选用苗前土壤处理除草剂40%砜吡草唑SC按照120~180 g a.i./hm^(2),配合播种后21 d按照22.5~27 g a.i./hm^(2)施用苗后除草剂30%苯唑草酮SC,对苦参和射干2种作物田杂草的防除效果和安全性良好。展开更多
基金Supported by the National Basic Research Program of China(2011CB301900)the National Natural Science Foundation of China(61176063,60990311,60820106003,60906025,60936004)+1 种基金The Nature Science Foundation of Jiangsu Province(BK2008019,BK2010385,BK2009255,BK2010178)the Research Funds from NJU-Yangzhou Institute of Optoelectronics.
文摘Roughened surfaces of light-emitting diodes(LEDs)provide substantial improvement in light extraction efficiency.By preparing the self-assemble nanoporous Ni template through rapid annealing of a thin Ni film,followed by a low damage dry etching process,a p-side-up LED with a roughened surface has been fabricated.Compared to a conventional LED with plane surface,the light output of LEDs with nanoporous p-GaN surface increases up to 71%and 36%at applied currents of 1 mA and 20 mA,respectively.Meanwhile,the electrical characteristics are not degraded obviously after surface roughening.
文摘[目的]探索化学除草剂对2种中药材苦参和射干苗期杂草的防除效果及其对该2种作物的安全性。[方法]通过田间小区试验,研究40%砜吡草唑SC土壤喷雾+30%苯唑草酮SC播种后21 d茎叶喷雾,按照低(120+22.5)、中(180+27)、高(240+45)g a.i./hm^(2)3个剂量组合搭配,48%仲丁灵EC按照1440 g a.i./hm^(2)苗前一次性土壤喷雾的方法,施药后持续调查4种不同处理对田间杂草的株防效,以及对苦参和射干2种作物出苗和株高的影响。[结果]40%砜吡草唑SC+30%苯唑草酮SC的中(180+27)、低(120+22.5)g a.i./hm^(2)剂量处理组合在苗后茎叶处理后7~42 d,对田间杂草的株防效可维持在80%以上,且该剂量组合处理对苦参和射干的出苗和株高并无明显不利影响。[结论]选用苗前土壤处理除草剂40%砜吡草唑SC按照120~180 g a.i./hm^(2),配合播种后21 d按照22.5~27 g a.i./hm^(2)施用苗后除草剂30%苯唑草酮SC,对苦参和射干2种作物田杂草的防除效果和安全性良好。
