以中孔MCM-41为载体制得均一分散的粒径约5 nm的Ru纳米粒子催化剂MCM-41-Ru,采用电感耦合等离子体、透射电镜、能量散射谱、X射线衍射和N_2吸附-脱附法对其进行了表征,并将其
澳大利亚不仅以其美丽的海滨风光,迷人的现代都市,独特的生态环境,多元的文化氛围倾倒海外旅游者,还为随处可见、便捷、周到、热情的旅游咨询服务使他们感到这个国际旅游目的
Organophosphorous pesticide(OP) contamination has serious adverse effects on human health and the environment. Due to the toxicity of OPs and the threat present
Cystic fibrosis, a common autosomal recessive genetic disorder among Caucasians, is caused by defects in the transmembrane conductance regulatory(CFTR) gene. Th
研究LN患者外周血淋巴细胞 (PBL)在IL - 18刺激下细胞凋亡及凋亡相关基因表达情况。方法 :AnniexinV联合PI染色定量法及免疫荧光染色法 ,分析了 12例活动期和 2 6例非活动期
Transplantation in children is the best option to treat renal failure. Over the last 25 years the improvements in therapy have dramatically reduced the risk of
Dyspnea(or breathlessness) is a symptom describing a perceived experience of breathing discomfort. Children’s awareness of dyspnea is variable and there is onl
应用经济学的两产品模式对我国旅游业快速增长和市场回落两趋势进行了分析
Analysis of the Trend of Rapid Growth and Depression in China’s Tourism Industry Based on
合成了以N-甲基咪唑为配体,Cu为活性中心的络合金属多相催化剂Cu(I)-NHC-SBA-15。通过1H-NMR、13CNMR、有机元素分析和FTIR对各步合成反应产物结构经行了鉴定;用SEM、N2吸附
对血管阻断剂活性分子((Z)-3-氨基-3,4,4,5-四甲氧基二苯乙烯(AVE-8063)的合成进行了研究.以对甲氧基苯乙酸(Ⅰ)为原料,经溴代及Perkin反应得到(E)-2-(3-溴-4-甲氧基苯基)-3-(3,4,5-三甲氧基苯基)丙烯酸(Ⅲ),再经芳环上溴的氨基取代得到(E)-2-(3-氨基-4-甲氧基苯基)-3-(3,4,5-三甲氧基苯基)丙烯酸(Ⅳ),最后在Cu/1,10-Phen/