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Two-dimensional (2D) materials have received extensive attention in the fields of electronics,optoelec-tronics,and magne......
The substituent chemical shift （SCS） has been applied to the assignment of the <sup>13</sup>C NMRspectrum of chlorinated p......
(Editor’s note:the following article iscontributed by Shanhai Henyin FuturesBrokerage Co.Ltd.Although we doubt theaccu......
Synthesis of β-alkynyl α-amino acids via palladium-catalyzed alkynylation of unactivated C(sp~3)-H b
-Di-substituted 氨基酸(AA ) 包含邻近的碳 stereogenic 中心并且提出可观的合成挑战。对常规合成策略补足基于存在的功能的组的......
In this work, four kinds of cellulose aliphatate esters, cellulose acetate(CA), cellulose propionate(CP), cellulose buty......
Design, synthesis and insecticidal activities of novel anthranilic diamides containing polyfluoroalk
In order to discover new molecules with good insecticidal activities, a series of anthranilic diamides containing polyfl......
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Thirteen novel sulfonylureas containing thiadiazole moiety were synthesized in a two-step reaction. Their structures wer......
Influences of anionic and cationic dopants on the morphology and optical properties of PbS nanostruc
Selenium and zinc are used as anionic and cationic dopant elements to dope PbS nanostructures. The undoped and doped PbS......
Thirteen derivatives of di[(phenyldimethylsilyl)methyl]methyltin dithiophosphates have been synthesized and characteriz......
Substituent effects on chloro meso-tetra-ortho-alkylphenylporphinato iron catalyzed biomimetic oxida
Six sterically hindered chloro meso-tetra-ortho-alkylphenylporphinato irons (T(o-R)PPFe(HI)Cl, R = Me, Et, n-Pr, i-Pr, ......
Trifluoromethyl steroids la,b; 2a,b; 3a,b have been synthesized by starting from estren 3,17-dicarbonyl-3,3-dimethyl eth......
A series of sulfated binary and trinary oxide solid superacids were prepared, and their catalytic activities for n-butan......
Previous studies showed that tyrosine hydroxylase or neurturin gene-modified cells transplanted into rats with Parkinson......
Direct chiral high performance liquid chromatography separation of O-ethyl O-phenyl N - isopropylpho
The enantiomers of thirty-nine O-ethyl O-phenyl N-isopropyl phosphoroamidothioates have been separated by high performa......
The geometries and bonding characteristics of the first-row transition-metal carbene cations MCH_2~+ were investigated ......
The zinc 3-hydroxy-2-mercaptopyridine complex was prepared by self-assemby reaction of Zn(NO3)2 and 3-hydroxy-2-mercapto......
A mixture of hypophosphorous acid (H3PO2) and iodine in acetic acid can cleave the N-alkyl bond in a variety of N-1 subs......
A novel chiral bis(ferrocenyl) P2N ligand 1 with C2-symmetry was synthesized through a four-step procedure from (R)-N,N-......
A new furost-20(22)-ene oligoglycoside named as aspacochioside C was isolated from the roots of Asparagus cochinchinensi......
The morphological transformation process of gold nanorods(Au-NRs) resulting from the reaction be-tween tetracycline and ......
A diastereoselective method for the synthesis of chiral pyrrolidine and piperidine ring containing compounds was describ......
The chiral clusters (m3-S)MCoW(CO)8[h5-C5H4C(O)OCH3] [M=Ru (2), Fe (3)] were synthesized by asymmetric induction of N-be......
Two new sesquiterpenes,1b-(b-)furancarboxy-4a-hydroxy-6a,13-diacetoxy-9b- cinna- moyloxy-b-dihydroagarofuran(1)and1b,6a-......
Treatment of N-alkoxyamides with bis(trifluoroacetoxy)iodobenzene generated electron deficient nitrogen species, which r......
The solubility parameters of cellulose acrylate substituted degree 2.12(CEA) have been calculated from the measured rete......
Novel chiral tetralin compounds were designed and synthesized,and their antifungal activities in vitro were tested.The r......
Clean synthesis of calix[4]crown-5-sulfonyl cyclothiourea derivatives at room temperature in aqueous
Calix[4]-crown-5-sulfonyl cyclothiourea derivatives 6 and 7 were synthesized from calix[4]-crown-5-monosulfonylethylene-......
Simply air:Vanadium-catalyzed oxidative kinetic resolution of methyl o-chloromandelate by ambient ai
Vanadium-catalyzed oxidative kinetic resolution(OKR) of methyl o-chloromandelate 2a,key intermediate of the well-known o......
Structure and Migration Characteristic of Heterointerfaces During the Phase Transformation from L1_2
Based on the microscopic phase-field model, the structure and migration characteristic of ordered domain interfaces form......
Microstructural evolution of direct chill cast Al-15.5Si-4Cu-1Mg-1Ni-0.5Cr alloy during solution tre
Heat treatment has important influence on the microstructure and mechanical properties of Al-Si alloys. The most common ......
Orthoferrite solid solution HoFe_(1-x)Cr_xO_3(x=0,0.2,…,1.0)was synthesized via solid state reaction methods.The crysta......
Type Ⅶ secretion systems (T7SSs) are found in many disease related bacteria including Mycobacterium tuberculosis (Mtb).......
Alteration of cholinergic and peptidergic neurotransmitters in rat ileum induced by acute stress fol
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
分别分析了红外焦平面阵列(IRFPA)基于定标的非均匀性校正法(NUC)和基于场景的NUC算法各自的优势和问题,在此基础上提出了联合非均......
针对变电设备典型视觉缺陷检测中快速定位及缺陷检测的自动化程度和效率较低问题,提出了一种融合边缘计算和改进的Faster R-CNN变......
为解决花绒寄甲(Dastarcus helophoroides)人工繁育技术的关键问题,提高繁殖数量,寻找适宜的替代寄主,研究了与花绒寄甲原始寄主亲......
为准确测量^(10)B(n,α)7Li和^(10)B(n,t2α)的反应截面,需制备质量厚度为50~350μg/cm^(2)的^(10)B靶。本文系统研究了同位素^(10......
为解决电镀铬工艺严重污染环境的问题,制备低污染且具有良好外观的Ni-Co-B合金代硬铬镀层。采用单因素实验分别讨论电镀液组成及工......
运用正交设计,采用不同的基质配比、网袋规格、缓释肥数量对东南石栎（Lithocarpus harlandii）进行轻基质网袋容器育苗试验,结果表明,......
根据肖特基理论和电子在半导体中的扩散理论，建立了模拟染料敏化太阳电池（DSSC）J-U特性的理论模型，分析了透明导电氧化物（TCO）基底材料的......
从矿产资源勘查的角度,探讨了老矿山的找矿前景和危机矿山接替资源寻找的地质依据与可行性.侧重从老矿山资源拓展、提高资源勘查与......
输配电网络建设是我国城市建设的重要组成部分.对于目前电网建设难度大、建设周期长、对环境影响大的问题,提出了一种基于预制舱的......
采用IEC61850协议是新一代数字变电站的自动化系统的核心技术之一，变电站自动化系统及其智能电子装置IED的配置在IEC61850协议中占......
目的：对粝固醇５α－还原酶在人脑颞叶组织中的活性分布进行研究。方法：采用＾３Ｈ标记和未标记睾酮的混合液为酶作用底物，建立类固醇５α－还原酶的......
中央政府将环境保护纳入地方政府官员政绩考核的制度安排与环保政绩考核目标从“底线控制”转向总的生态治理效果最大化紧密相关。......
对比分析溶解浆、针叶浆、竹浆纤维性状,采用不同比例溶解浆替代针叶浆,研究其对浆料性状及抄造成型的影响。结果表明:溶解浆纤维......
对复合垂直流人工湿地系统（IVCW）基质中5种常见的氧化还原酶活性进行了研究．结果表明，氧化还原酶活性存在显著性季节差异，过氧化物酶在......
以小麦中国春-长穗偃麦草二体代换系为材料,利用基于图像扫描的根系分析系统对幼苗根系的总根长、根系表面积和根系平均直径等性状......
不同品种和肥料处理的叶角与内源微素含量存在下列关系：玉米素含量低、赤霉素含量高时叶片披垂，叶角较大；而玉玉米素含量高．赤霉素含量......
