共查询到20条相似文献,搜索用时 0 毫秒
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Helander MG Wang ZB Qiu J Greiner MT Puzzo DP Liu ZW Lu ZH 《Science (New York, N.Y.)》2011,332(6032):944-947
In organic light-emitting diodes (OLEDs), a stack of multiple organic layers facilitates charge flow from the low work function [~4.7 electron volts (eV)] of the transparent electrode (tin-doped indium oxide, ITO) to the deep energy levels (~6 eV) of the active light-emitting organic materials. We demonstrate a chlorinated ITO transparent electrode with a work function of >6.1 eV that provides a direct match to the energy levels of the active light-emitting materials in state-of-the art OLEDs. A highly simplified green OLED with a maximum external quantum efficiency (EQE) of 54% and power efficiency of 230 lumens per watt using outcoupling enhancement was demonstrated, as were EQE of 50% and power efficiency of 110 lumens per watt at 10,000 candelas per square meter. 相似文献
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本文对固定化酵母生产蜂蜜酒的工艺条件进行了研究,通过L9(3~4)正交试验确定了最适固定化条件和最佳发酵条件。 相似文献
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随着中小型生猪场的快速发展,猪场废弃物产生量激增。猪场废弃物的环保有效处理是保持猪场具有良好生态环境的重要前提。黑水虻可以快速彻底将畜禽的粪便转化为优质蛋白饲料,即在保护环境的同时,不但能有效解决猪场废弃物堆积问题,且能变废为宝。本文主要介绍了利用黑水虻处理生猪粪污的工艺流程、质量要求和注意事项,同时分析了黑水虻处理粪便工艺的用价值和优势,为猪场粪便的处理提供参考依据,以达到猪场废弃物环保高效循环利用的目的。 相似文献
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睾丸注射Mx基因生产抗病转基因鸡初探 总被引:1,自引:1,他引:1
采用脂质体转染法,将线性化pcDNA3.0-MMx质粒随机打点注射入18周龄青年公鸡睾丸内,术后观察公鸡日常活动、常规检测精子;采集转染后25、50、75 d公鸡精液,并于转染70 d后人工采精,授精于正常母鸡,产生F1后代,采用常规PCR检测技术,检测证实外源Mx基因的整合情况,探讨外源Mx基因在鸡体内稳定整合和遗传的能力。结果表明:手术法转染外源基因过程对公鸡的生殖功能未造成明显影响;PCR检测证实外源Mx基因已整合到精子基因组,且能通过体外受精传递给后代,后代PCR检测的阳性率为27.27%(6/22)。证明外源Mx基因能稳定整合到基因组上,睾丸内注射法可能是一种切实可行、易于推广的制备抗病转基因鸡的方法。 相似文献
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植物有机营养试验中供试无茵苗通常由种子获得,因此,种子灭菌非常重要.采用多种消毒剂(70%酒精,10%H2O2,2%次氯酸钠和0.1%HgCl2等)对几种作物种子进行组合灭菌.结果表明,灭菌效果与作物种类、种子贮存时间及不同消毒剂组合等有很大关系.采用70%酒精浸1min→无菌水冲3次→2%次氯酸钠浸5min→无茵水冲5次→0.1%HgCl2浸5min→无茵水冲6次的组合灭菌程序,可取得较好的灭茵效果;若种子对2%次氯酸钠敏感,则可用10%H2O2代替. 相似文献
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We have produced a stretchable form of silicon that consists of submicrometer single-crystal elements structured into shapes with microscale, periodic, wavelike geometries. When supported by an elastomeric substrate, this "wavy" silicon can be reversibly stretched and compressed to large levels of strain without damaging the silicon. The amplitudes and periods of the waves change to accommodate these deformations, thereby avoiding substantial strains in the silicon itself. Dielectrics, patterns of dopants, electrodes, and other elements directly integrated with the silicon yield fully formed, high-performance "wavy" metal oxide semiconductor field-effect transistors, p-n diodes, and other devices for electronic circuits that can be stretched or compressed to similarly large levels of strain. 相似文献
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对水稻有机营养试验供试无菌苗准备过程中种子灭菌、检菌、无菌苗筛选及培育等技术环节作一探讨.采用本试验方法,水稻种子的灭菌率可达66%以上,发芽率可达81%以上,可为水稻无菌培养试验提供大量符合试验要求的无菌苗. 相似文献
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比较研究了利用传统的油浴法和150℃电热干燥箱恒温加热20、30、40min后,测定5种不同土壤腐殖质的含碳量。结果表明:150℃电热干燥箱恒温加热30、40min与油浴法之间不存在显著差异,但加热30min的测定方法与油浴法间的相关性更显著(Y=1.0082X+0.0003,r=0.9992**)。150℃干燥箱恒温加热法具有操作简便、重现性好、无实验室二次污染等优点。 相似文献
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《农业科学学报》2017,(4)
China is one of the most important centers of origin for Citrus genetic resources. Due to the high content of secondary metabolites,mining wild Chinese Citrus for novel medical applications is promising. In this study,extracts of Chinese wild species from different taxonomical groups were screened for potential effects on microtubules(MTs)in vitro. MT density as a readout for nucleation,and frequency distribution over MT lengths as a readout for elongation and decay were determined by quantitative image analysis via a standardized coverslip assay using fluorescently labelled neurotubulin. Extract from peels of Citrus ichangensis Swing. strongly increased the density of MTs; whereas,extract from peels of Citurs limon(L.)Burm.f. exerted the opposite effect. Extract from pulp of Citrus limonia Osbeck promoted MT elongation,and in addition induced a small population of very long MTs. These data suggest that wild Chinese Citrus harbour compounds that act specifically on different aspects of MT nucleation,elongation,and decay. 相似文献
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王福林 《浙江大学学报(农业与生命科学版)》1996,(1)
对求解非线性约束优化问题的复合形法中的初始复合形产生问题进行了探讨,给出了一种改进的产生方法,改进后的方法不仅计算速度较现有文献给出的方法快,而且不论可行域是否为凸集,都能可靠地产生一个初始复合形。同时探讨了复合形法在迭代过程中,如果中心点不是可行点时,重新构造初始复合形的问题。 相似文献
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朱建飞 《湖南农业大学学报(自然科学版)》2011,37(6):689-692
为提高紫苏粕的综合利用率,采用有机溶剂提取法提取紫苏粕中的天然类胡萝卜素,通过单因素试验得出适宜的提取溶剂种类、丙酮与甲醇的体积比、提取温度、提取时间、固液比(紫苏粕质量与混合液体积的比),通过正交试验得出有机溶剂提取紫苏粕中类胡萝卜素的最佳工艺条件:丙酮与甲醇体积比为2:1,提取温度为50℃,提取时间为8h,固液比为... 相似文献
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Experimental elimination of mast cells from the peritoneal tissues of the rat by distilled water treatment inhibited the increase of vascular permeability which normally follows a passively induced antigen-antibody reaction in peritoneal tissue. Thus mast cells may contribute to the initiation of inflammation which follows antigen-antibody reactions. 相似文献
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将非线性互补问题转化为光滑方程组是求解非线性互补问题的一个重要途径.通过对min函数的光滑化,引入了一个新的光滑NCP函数,并在此基础上建立了求解P0函数非线性互补问题的一步光滑牛顿法;同时在较弱的条件下证明了该算法的适定性和全局收敛性. 相似文献
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将非线性互补问题转化为光滑方程组是求解非线性互补问题的一个重要途径.通过对min函数的光滑化,引入了一个新的光滑NCP函数,并在此基础上建立了求解P0函数非线性互补问题的一步光滑牛顿法;同时在较弱的条件下证明了该算法的适定性和全局收敛性. 相似文献
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康氏木霉REMI突变株产纤维素酶固态发酵条件 总被引:1,自引:0,他引:1
为探索康氏木霉REMI突变株适宜的产酶条件,通过正交试验对其固态发酵培养基、接种量、料水比、培养时间和培养温度等进行了研究.试验确定最佳培养基组分为稻草粉:麦麸为9:1(质量比),料水比1:1(质量比),硫酸铵1%,Tween-20 0.1%,通过单因素优化试验,确定最佳培养条件为:接种量5%(7.5%,培养温度30 ℃,培养时间96 h,pH自然;该突变株的FPA酶活和CMC酶活分别达6.097,8.123 IU/g. 相似文献