4,689 research outputs found

    N-{N-[5-(2,4-Dichloro­phen­yl)-1,3,4-thia­diazol-2-yl]carbamo­yl}-2,6-difluoro­benzamide

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    In the title compound, C16H8Cl2F2N4O2S, the thia­diazole ring makes dihedral angles of 24.94 (14) and 48.11 (14)°, respectively, with the dichloro- and difluoro-substituted benzene rings. An intra­molecular N—H⋯O hydrogen bond results in the formation of a planar (mean deviation 0.0091 Å) six-membered ring. In the crystal structure, mol­ecules form centrosymmetric dimers through pairs of inter­molecular N—H⋯O hydrogen bonds

    5-(2-Fluoro-4-nitro­phen­yl)-1,3,4-thia­diazole-2-amine

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    The title compound, C8H5FN4O2S, was synthesized by the reaction of 2-fluoro-4-nitro­benzoic acid and thio­semicarbazide. The dihedral angle between the thia­diazole and benzene rings is 27.1 (2)°. In the crystal, inter­molecular N—H⋯N and C—H⋯O hydrogen bonds link the mol­ecules

    Dichloridobis(5-heptyl-1,3,4-thia­diazol-2-amine-κN 3)zinc(II)

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    In the title compound, [ZnCl2(C9H17N3S)2], the ZnII atom is four-coordinated by two N atoms from two 5-heptyl-1,3,4-thia­diazol-2-amine ligands and two Cl atoms in a distorted tetra­hedral geometry. The thia­diazole rings are oriented at a dihedral angle of 84.87 (4)°. Intra­molecular N—H⋯Cl inter­actions result in the formation of two six-membered rings having envelope and planar conformations. In the crystal structure, inter­molecular N—H⋯N and N—H⋯Cl inter­actions link the mol­ecules into a three-dimensional network. π–π contacts between thia­diazole rings [centroid–centroid distance = 3.602 (1) Å] may further stabilize the structure

    麻醉科医生工作倦怠现状及其影响因素研究

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    Objectives: To understand the status and the practical needs of the job burnout of anesthesiologists, and to analyze the main influence factors of it. Methods: Choosing CMBI as the main scale, to survey 337 anesthesiologists of 43 3A-grade or 2A-grade hospitals in Jiangsu, and to draw conclusions through the SPSS statistical analysis and literature research. Results: Female anesthesiologists are more highly depleted and an anesthesiologist, 40-49 years old, married, with a M.D.’s degree or in a senior professional title is at a high level of the job burnout. Job stress, health condition, monthly income, work experience and age influence the emotional exhaustion, with extra working hours, health condition, promotion opportunities, support from relatives and friends, hospital violence and night duties influencing the personal efficacy. Conclusions: Most of anesthesiologists in China are at mild or moderate level of the job burnout, which can be reduced by increasing opportunities for promotion and relieving working stress.目的  了解麻醉科医生工作倦怠方面研究现状及现实需要,分析麻醉科医生工作倦怠主要影响因素。方法  选择工作倦怠量表CMBI为主量表,结合文献研究,对江苏省43家三级与二级医院中337名麻醉科医生进行调查,并通过SPSS统计分析得出结论。结果  女性麻醉科医生耗竭程度较高,40~49岁、已婚、博士学位或高级职称麻醉科医生都有较高工作倦怠水平;耗竭维度影响因素为工作压力、健康状况、月均收入、工作年限及年龄,成就感降低维度影响因素为加班情况、健康状况、迁升机会、亲友支持、医院暴力及夜班情况。结论  国内医护人员中大部分都存在轻中程度工作倦怠,可通过增加迁升机会及缓解工作压力等减轻工作倦怠

    Planar carbon nanotube-graphene hybrid films for high-performance broadband photodetectors

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    Graphene has emerged as a promising material for photonic applications fuelled by its superior electronic and optical properties. However, the photoresponsivity is limited by the low absorption cross section and ultrafast recombination rates of photoexcited carriers. Here we demonstrate a photoconductive gain of \sim 105^5 electrons per photon in a carbon nanotube-graphene one dimensional-two dimensional hybrid due to efficient photocarriers generation and transport within the nanostructure. A broadband photodetector (covering 400 nm to 1550 nm) based on such hybrid films is fabricated with a high photoresponsivity of more than 100 AW1^{-1} and a fast response time of approximately 100 {\mu}s. The combination of ultra-broad bandwidth, high responsivities and fast operating speeds affords new opportunities for facile and scalable fabrication of all-carbon optoelectronic devices.Comment: 21 pages, 3 figure

    5-(2,4-Dichloro­phenoxy­meth­yl)-1,3,4-thia­diazol-2-amine

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    The title compound, C9H7Cl2N3OS, was synthesized by the reaction of 2,4-dichloro­phenoxy­acetic acid and thio­semicarbazide. The dihedral angle between the thia­diazole and benzene rings is 21.5 (2)°. In the crystal, inter­molecular N—H⋯N hydrogen bonding links the mol­ecules into chains along the b axis
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