纵向a—Si MOSFET集成电路

采用非晶硅的原生二氧化硅作为绝缘栅，使纵向a-Si MOSFET的特性得到明显的改善。a-Si材料的最大场致迁移率为1.2cm/V.s。用纵向a-Si MOSFET成功地研制了E／E倒相器和环型振荡器，最小门延时时间为95ns，同时还描述了a-Si MOSFET RS触发器的电路特性。     

水葫芦叶绿素面膜膏的研制

文章利用水葫芦叶固有鲜亮绿色富含叶绿素这一特性,在最佳工艺条件下提取叶绿素来制备营养保湿面膜膏。以较简单的配方为原则,选择在面膜膏中应用较为广泛的原料进行叶绿素面膜膏的试制。通过正交实验,找出一个具有最佳面膜膏的基础配方来调配面膜膏,并对该产品的理化指标进行检测和产品使用效果进行评价。     

Influence of lanthanum level and interactions with nitrogen source on early development of Juglans nigra

Rare earth elements have been used for 30 years in Chinese agriculture to improve growth and yield. Numerous scientific studies have shown improvements in physiology, mineral nutrition, and growth, though deleterious effects may also occur. Very few studies have been performed on woody species. We exponentially fertilized one-year old black walnut (Juglans nigra L.) seedlings with 0, 0.1, 1, 10, or 100 mg lanthanum (La) and 800 mg nitrogen (N) as NaNO3, (NH4)2SO4, NH4NO3, or no N. One month following final fertilization, growth, mineral nutrition, photosynthesis, chlorophyll, and nitrate reductase activity were assessed. Plants fertilized with the highest level of La had reduced fine root growth, concentrations of magnesium, calcium, nickel, and phosphorus, photosynthesis levels, and chlorophyll a content. Foliar La concentration showed an interaction effect, with three to four times greater concentration in plants fed at 100 mg La to those given 10 mg La for (NH4)2SO4 and NH4NO3 treatments. The results suggested no beneficial effects of La addition at levels used in this study and interactions between N source and La levels did not have an important impact on the growth, mineral nutrition, or physiology of black walnut seedlings.     

网上音乐新势力a2b

互联网上的B2B或B2C你可能听得多,那么a2b你又有否听过呢?其实就算没有听过也不要紧,因为a2b并不是什么电子商务的新模式,而是由美国最大电话及电讯公司AT＆T所开发出来的网上音乐新格式,无论功能及音响质素皆比目前的MP3为佳,因此极可能成为下一代网上音乐的标准。     

河北建设投资集团拟投资建设40亿m~3/a煤制天然气项目

2014年9月16日,河北建设投资集团有限责任公司40亿m3/a煤制天然气项目可行性研究报告评审会在河北召开。该项目选址在内蒙古鄂尔多斯市准格尔旗大路煤化工基地,计划总投资290亿元。该项目2013年取得国家发改委路条以来,经过预可研的审批以及土地、水指标、环评、煤炭资源选配等前期工作后,进入了可研报告评审环节,表明该项目建设已进入实     

聚丙烯装置中PK601技改的探索

结合陕西延长石油延安石油化工厂聚丙烯装置,通过对比冷媒R134a与R1270(propylene)的性质,提出技改冷冻机组PK601的几种方案并初步分析其方案的可行性,将冷冻机组PK601进行技改。若本技改方案成功有利于提高装置利用率,减少能源消耗,减少环境污染,增加收益。     

ODS替代品——混合制冷剂的发展及应用前景分析

混合制冷剂是开拓替代工质的一种途径，是ODS替代品重要替代方案之一，本文列举各种混合制冷剂的特性，并分析讨论，对重要的混合工质的选用问题作有关论述。