共查询到20条相似文献,搜索用时 11 毫秒
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在分析实验室日常管理工作中引入5S管理理念,分析实验室日常管理水平得到提高,也大大提高了分析人员的工作效率,为高质量、高水平要求的实验室建设奠定基础.“5S管理”在塑造企业形象、降低分析成本、分析数据的准确及时、分析检测安全作业等方面发挥了优越性. 相似文献
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辽·金唐、宋期间兴亡的诸王朝,虽然或是受唐文化的残余影响,或是带有新文化的萌芽,但都各自结束了其短暂的生命。在诗画方面,很快就被宋代的风格所取代,相反,在工艺方面却坚定不移地保持着唐代的制作遗风。如果从残留于南唐的陵墓中的唐草纹样来看,建筑等也仍有着较强的保守倾向,关于陶瓷的纹样,象在吴越的青瓷上表现的那样,唐草和龙凤等原封不动地继承了唐镜和银器的意匠。但是,这些制作者对于唐代的 相似文献
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《Journal of Sulfur Chemistry》2013,34(5):502-511
The synthesis of isomeric hydroxyphenyl-1,3-dithianes and the role of sulfur in them to generate different engineered solids based on non-bonded O···S contacts and O?H···S hydrogen bonds are presented. With an increasing number of OH groups and dithiane rings (e.g. 2, 3), the role of O?H···S interactions becomes less prominent and the strong O?H···O hydrogen bonds along with C?H···π and π–π stacking interactions dominate the packing arrangement of the hydroxyphenyl-1,3-dithianes. 相似文献
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Luran.S ASA树脂具有优异的耐候性,耐老化、耐泛黄性,以及良好的机械物理性能和优异的耐化学性、比较好的热稳定性。由于拥有各种优异的特性,及简易的加工工艺,Luran.S ASA非常适合应用于汽车、摩托车等各种运输工具的外部部件、电器用品、建筑材料、卫浴用品、太阳能基板载具及其他户外产品中。 相似文献
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Abedien Zabardasti Hossein Afrouzi Ali Kakanejadifard Zahra Jamshidi 《Journal of Sulfur Chemistry》2017,38(3):249-263
The S···P interactions in the complexes of HSX (X?=?F, Cl, Br, I) with PHnMe3-n(n?=?0–3) have been investigated with ab initio calculations at the MP2/aug-cc-pVDZ and MP2/aug-cc-pVTZ//MP2/aug-cc-pVDZ level of theory. The interaction energies and structural properties of intermolecular complexes have been analyzed. Results of QTAIM analysis are dealing with expand of interactions, including pure closed-shell interactions (van der Waals interactions and chalcogen bonding, YB), partially covalent closed-shell (CS; Charge Transfer) and shared-shell interactions (SS; weak covalent bond and very strong YB) for these complexes. The energy decomposition analysis (EDA) showed that electrostatic interactions are an important contributing factor for these complexes. In considering second-order contributions, the donor-acceptor pair charge transfer (CT) is most important. These findings are consistent with the Electron Localization Function (ELF) isosurface of the complexes. In each series of HXS:PHnMe3-n-chalcogen bond complexes with increasing basicity of phosphines, the stability and S···P bond strength of adducts were increased so that the HXS:PMe3 (X?=?F, Cl, Br) complexes had very strong S···P chalcogen interactions with nearly covalent characters. 相似文献
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介绍了木器着色的新工艺及其涂料生产的原料组成、配制方法、主要技术指标及其影响因素. 相似文献
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埃米尔·费雪是一九○二年诺贝尔化学奖获得者,他的研究为现代有机化学工业的发展奠定了基础,被后人称誉为“实验室的神明。”一、最年轻的博士生埃米尔·费雪于一八五二年十月九日生 相似文献
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5S管理是一种现代管理方法,包含整理、整顿、清扫、清洁和素养五个方面。在实验室推行5S可提升实验室形象、提高实验效率、减少安全隐患、改善实验室精神面貌等。通风橱和实验台等实验场所,试剂与耗材,办公设备是高校化学实验室的重要组成部分,相应地提出了实施5S的具体措施,以期提高实验人员的职业素养和高校化学实验室的管理水平。 相似文献
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Hydrogen bond acceptor ability of sulfur and oxygen has been analyzed in the adducts of dimethyl sulfide ((CH3)2S) and dimethyl ether ((CH3)2O) with H2O, CH3OH, HCOOH, NH2OH, CH3NH2, NH2NH2, HCONH2, HF and HCl. The stabilization energies have been evaluated using MP2/aug-cc-pVDZ, B3LYP/aug-cc-pVDZ, gaussian2 (G2) and complete basis set (CBS) theoretical levels. The contributors to stabilization energies are explored by employing symmetry adapted perturbation theory analysis, natural bond orbital analysis in addition to molecular orbital methods. Electrostatic component is the major contributor toward stabilization energy in both the type of adducts involving (CH3)2S and (CH3)2O which has been assigned to secondary electrostatic interactions. The second important contributor to comparable stabilization energies in the two series is the repulsive Eexch component which is relatively higher in adducts of (CH3)2O because of the relatively longer proximity of the monomeric units arising from smaller size of oxygen. 相似文献
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5S管理体系起源于企业管理中,在生产过程中对人员、机器、材料、方法等生产要素进行有效的管理,现广泛运用在各制造业、服务业、机关事业单位中.在高校实验室管理和教学中,进行5S企业管理方法试点推广,是完善标准化实验室管理的重要补充以及贯彻实施的基础,可以有效地提高实验室管理人员的工作效率,培养学生在实验过程中的规范操作和动... 相似文献
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