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A protocol for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and-thiones was developed by means of a three-component ......
Oilfield waters from Cenozoic and Mesozoic terrestrial and Paleozoic marine environments in the Tarim Basin show no obvi......
Synthesis and characterization of dendronized poly(methylsiloxane) with appendent Fréchet-type dendr
A new kind of dendronized poly(methylsiloxane) (3a and 3b) with appendent Fre-chet-type poly(aryl ether) dendrons has b......
Two flavonoid triglycosides,kaempferol 3-O-{β-D-glucopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→6)]-β-D-glucopyra- nos......
目的 模拟婴儿下肢伸直襁褓体位建立动物模型,探讨该体位对髋臼发育的影响.方法 将29只新生Wista幼鼠用医用胶带将双小腿、双髋关......
Radiation induced graft polymerization of multi-walled carbon nanotubes for superhydrophobic composi
Highly soluble multi-walled carbon nanotubes(MWNTs) were prepared by radiation-induced free radical graft polymerization......
The syntheses and HPLC analysis of N-desmethyltamoxifen and carbon11 labelled tamoxifen are described. In order to obtai......
Thioredoxin is a ubiquitous dithiol oxidoreductase found in many organisms and involved in numerous biochemical process......
The ability of vitamin E to prevent or treat experimental lead intoxication was investigatedin rats.Lead ingestion(10 m......
Objective To develop an LC-MS/MS method for determining the concentration of wogonin in dog plasma and investigate the p......
The study of the eosinophil CD34~+ progenitor cells differentiation mechanism of model rats with occ
Objective To investigate the mechanism of CD34~+ progenitor cell differentiation in rat by observing the change relation......
Both enantiomers of denopamine were synthesized using microbial-chemical approach via bioreduction of 1-(acetoxyphenyl)......
Phytochemistry of the essential oil of Melissa officinalis L. growing wild in Morocco: preventive ap
Objective: To determine the phytochemical characterization and antibacterial activity of Melissa oi cinalis essential oi......
[Objective] To establish the microscopic and TLC method for the herbal slice of Chinese Honeylocust Abnormal Fruit in St......
A simple, accurate and sensitive method for characterization of pentachlorophenol in soil was presented. The method incl......
Following hydrothermal synthesis process, MCM-41 was synthesized by using cetyltriethylammonium bromide as templating a......
New hyperbranched polyphenylenes with high molecular weights are synthesized by the copolycyclotrimerizations of 1,4-die......
In the study of extracting lithium with crown ether,it is necessary to determine the concentration of the lithium in org......
A series of catalysts of 12-Phosphotungstic acid (PW) and its cesium salts immobilizedon dealuminated ultra-stable Y zeo......
In this paper,a kinetics model for the liquid-phase oxidation of 2-methyl-6-acetyl-naphthalene to 2,6-naphthalene dicarb......
Practical and Efficient Acylation and Tosylation of Sterically Hindered Alcohols Catalyzed with 1-Me
Acylation of sterically hindered alcohols is frequently encountered in synthetic chemistry. An efficient and mild proced......
Two new terpenes,wilfornine H(1) and triptobenzene Q(2) were isolated from Tripterygium wilfordii,as well as 11 terpenes......
Extraction of Triterpenoids with Antioxidant and Anti-tumor Activity from Agrocybe aegerita Mycelium
Different organic solvents (petroleum ether, ethyl acetate and ethanol) were used to extract A. aegerita mycelium and sp......
Adsorption of chloroacetanilide herbicides on homoionic montmorillonite, soil humic acid, and their mixtures was studied......
reasing apparent strains, continuous nonlinear increments of tissue-level strains and stresses resulted in microdamage t......
Reactions of NiCl2·6H2O with dmpzm and formic or acetic acid at PH = 7 pro- duced the two title compounds, [Ni(dmpzm)2(......
以乙炔碳黑(ACET)为导电填料,高密度聚乙烯/乙烯-辛烯共聚物(HDPE/POE)为基体,制备了碳黑(CB)填充HDPE/POE复合材料,并研究了该材......
The simulation is carried out by employing the method of molecular dynamics with the single chain of konjac glucomannan ......
目的探讨依达拉奉（EDA）对Alzheimer病（AD）模型大鼠认知功能及海马内乙酰胆碱（Ach）含量的影响。方法 30只大鼠随机分为假手术组、AD组及ED......
瞄准：为了调查血浆 microRNA (miRNA ) ，在致命的 acetaminophen (APAP ) 的背景介绍 hepatotoxicity 的陈述语气在老鼠的毒性。方法......
考察了活性炭引发的常压微波连续放电下甲烷转化制C2烃的过程.活性炭及氩气的存在有利于常压连续微波放电的生成.在这一过程中甲烷......
本研究采用敌敌畏对家蝇的自然种群选育了20代，抗性指数由最初的4倍上升至20倍。选育过程中，F2～F14抗性变化不大，抗性指数在8倍左右变......
采用超细氧化镁作催化剂,乙酰乙酸乙酯和乙酸酐为原料,对乙酰丙酮的合成进行了研究,确定了最佳工艺条件:反应时间18 h,温度130℃,......
目的：通过术前术后对髋关节前倾角及髋臼壁发育情况的观察，探讨螺旋CT三维重建技术在儿童发育性髋关节脱位（DDH）治疗中的应用价值。方......
采用中性盐雾、乙酸盐雾、铜加速乙酸盐雾3种电化学方法研究碳纤维/环氧复合材料与CR4级冷轧钢板的电偶腐蚀行为。比较了CR4级冷轧......
目的:探讨强的松、硫唑嘌呤联合乙酰半胱氨酸治疗间质性肺炎的效果。方法:回顾性收集郑州市第六人民医院2019年3月-2020年3月接收......
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探讨正常面肌运动板形态学特征，以及神经损伤后再生终板的结核特点。方法 用恒冷箱切片，玻璃酸脱氢酶及乙酰胆碱酯酶复合染色，观察研......
本文研究了荔蝽头部乙酰胆碱酯酶（AChE）活性的季节性变化与自然抗药性的关系,以及敌百虫对AChE的影响,同时运用聚丙烯酰胺凝胶电泳的......
随着全髋关节置换术的应用增多，假体松动、髋臼骨折以及翻修率也明显提高。在髋关节翻修术中髋臼侧骨缺损是临床医生最具有挑战性的......
<正>在美国化学文摘(CA)收录的有关化学振荡的文献中,约有一半是关于Belousov-Zhabotinsky反应(简称B-Z反应)。经典的B-Z反应是具......
采用2，4-二硝基苯肼衍生化反应一高效液相色谱法对5辆国Ⅳ汽油车排放的醛酮类化合物进行试验研究。研究结果显示：汽油车尾气中甲醛、......
本文研究以山苍籽核仁油为原料制备的月桂醛和月桂醇合成环状缩醛型可降解表面活性剂,并对它们的结构进行表征、对其物理性质及在......
3,7-Dinitrodibenzobromonium salts were prepared directly byreaction of 4,4’-dinitrobiphenyl with both sodium bromide an......
A novel tricomponental condensation leading to p-nitrophenyl-ethyl hydrogen substituted benzylphosphonates was described......
采用蒸氨法制备了不同老化时间的Cu/SiO2催化剂。在固定床反应器上评价了Cu/SiO2催化剂对乙酸加氢制乙醇的催化性能,并通过BET、H2......
目的探讨个性化髋臼导板在单侧全髋关节成形术(THA)中的应用。方法2018年11月至2020年4月中国人民解放军联勤保障部队第920医院骨......
使用固体超强酸ＴｉＯ２／ＳＯ４＾２－催化合成双酚－－Ａ，探讨了反应温度，催化剂用量，反应时间，反应物摩尔配比等因素对反应的影响，最佳条件下双酚－－Ａ的收率为３２．９％，同时利用......
