二安替比林苯基甲烷含氧衍生物的合成及其分析应用研究

合成了９个二安替比林苯基甲烷含氧衍生物：二安替比林－（２－羟基）苯基甲烷（ＤＡＯＨＭ）、二安替比林－（３－羟基）苯基甲烷（ＤＡｍＨＭ）、二安替比林－（４－羟基）苯基甲烷（ＤＡｐＨＭ）、二安替比林－（２，４－二羟基）苯基甲烷（ＤＡＤＨＭ）、二安替比林－（２－甲氧基）苯基甲烷（ＤＡｏＭＭ）、二安替比林－（４－甲氧基）苯基甲烷（ＤＡｐＭＭ）、二安替比林－（３，４－二甲氧基）苯基甲烷（ＤＡＤＭＭ）、二安替比林－（２－羟基－３－甲氧基）苯基甲烷（ＤＡＨＭＭ）、二安替比林－（３－甲氧基４－羟基）苯基甲烷（ＤＡＭＨＭ）     

稀土合金的金相样品制备及组织分析

以Ｌａ－Ｃｏ－Ｎｉ三元系和Ｎｄ－Ｃｕ、Ｇｄ－ＣＵ二元系为例,介绍了稀土合金相试样的制备步骤和原则,给出了用该方法制作的５Ｌａ－７３Ｃｏ－２２Ｎｉ、５Ｌａ－８９Ｃｏ－６Ｎｉ、２５．６Ｌａ－３４Ｃｏ－４０．４Ｎｉ、Ｎｄ－６９Ｃｕ、Ｇｄ－１２Ｃｕ等成分合金的金相照片,并进行了适当的分析。     

镁—稀土中间合金品位对变形镁合金性能的影响

试验以镁－锌－锆－钕、镁－锌－锆－钇系变形镁合金为例，研究了镁－钕、镁－钇中间合金中钕、钇的品位对其性能的影响，结果表明，镁－钕、镁－钆中间合金钕、钇的品位高于８０％时，合金的室温拉伸性能较佳，反之，则合金的室浊拉伸性能低劣。     

β钛合金在飞机中的应用

美国、法国、德国、英国、日本、俄罗斯和中国的一些主要飞机制造工业厂家都开始采用β钛合金来生产飞机机体和发动机构件,主要原因是它们具有优良的综合性能,可加工成各种零件．目前最令人感兴趣的β钛合金包括用于制造锻件的Ti-10V－2Fe－3Al（Ti－10－2-3）,用于制造钣金构件和铸件的Ti-15V-3Cr－3Al-3Sn（Ti－15－3）、BT－22（Ti－5Al-5V－5Mo－1Fe－1Cr）和用于制造弹簧的Ti-3Al-8V－6Cr－4Mo－4Zr（Ti－38－6－44,β-C）;另外,由于Ti-14．7Mo－2．7Nb－3Al-0．2Si（β-21S）合金兼有出色的耐高温和抗腐蚀能力,…     

用1－苯基－3－甲基－4－（对硝基苄基）－5－吡唑啉酮从水溶液中溶剂萃取分离铁（Ⅲ）、钴（Ⅱ）、镍（Ⅱ）和铜（Ⅱ）的研究

用１－苯基－３－甲基－４－（对硝基苄基）－５－吡唑啉酮从水溶液中溶剂萃取分离铁（Ⅲ）、钴（Ⅱ）、镍（Ⅱ）和铜（Ⅱ）的研究Ｍ．Ｏ．Ｃ．Ｏｗｕｅｇｂｕ等业已对１－苯基－３－甲基－４－（对硝基苄基）－５－吡唑啉酮从各种ｐＨ值和络合物的水清液中萃取分离Ｆｅ（...     

空分设备缩短设计、施工与调试周期的实践

建设单位从项目批下来到资金到位，要求工程项目设计、施工、调试在很短时间内完成，为了满足建设单位（甲方）的要求，就需要对工程设计、施工、调试提出更高的要求，就需要在很短的时间内竣工，同时保证质量，减少投资。１原设计、施工、调试顺序空分设备以前的设计、施工、调试顺序是这样的：设计－土建施工－工艺设备安装－仪表设备安装－供电设备安装－工艺管线敷设－仪表管线敷设－仪表管线敷设－供电电缆槽及穿线管敷设－工艺设备管线探伤－刷漆－打压试验－吹扫－单体设备调试－裸冷－负荷试车－交用户使用。这样的设计、施工、调试…     

镁－稀土中间合金品位对变形镁合金性能的影响

试验以镁－锌－锆－钕、镁－锌－锆－钇系变形镁合金为例，研究了镁－钕、镁－钇中间合金中钕、钇的品位对其性能的影响，结果表明，镁－钕、镁－钇中间合金钕、钇的品位高于８０％时，合金的室温拉伸性能较佳，反之，则合金的室温拉伸性能低劣。     

Fe—C—P,Fe—Mn—P,Fe—Si—P三元金属熔体作用浓度计算模型

根据含化合物的金属熔体结构的共存理论，推导了１６７３Ｋ下Ｆｅ－Ｃ－Ｐ、Ｆｅ－Ｍｎ－Ｐ、Ｆｅ－Ｓｉ－Ｐ三元金属熔体作用浓度计算模型。计算的磷的作用浓度与相应的实测磷活度相符合，从而证明所得模型可以反映Ｆｅ－Ｃ－Ｐ、Ｆｅ－Ｍｎ－Ｐ、Ｆｅ－Ｓｉ－Ｐ三元熔体的结构本质。同时模型揭示了Ｃ、Ｍｎ、Ｓｉ的摩尔分数对磷的转换系数的影响规律。     

BPMOPD对硫酸介质中钪的萃取分离及其应用

本文以１，１０－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）癸二酮１，１０（ＢＰ－ＭＯＰＤ，简作Ｈ２Ａ）为萃取剂，对硫酸体系中微量钪与铝、铁、钛、镁、锰、钇、镱的萃取分离进行了研究。并结合偶氮胂Ⅲ光度法可成功地测定微量钪。     

稀土双取代基冠醚配合物的制备及性质

合成了镧、铈、钕高氯酸盐与４’，５’－二溴苯并－１５－冠－５固体配合物和高氯酸镧与４’－溴－５’－硝基苯并－１５－冠－５固体配合物。通过化学元素分析、红外光谱、紫外光谱、溶解性及摩尔电导测定等性质表征，证明４种配合物均为１：２型（Ｍ：Ｌ），非溶剂合、含有配位水分子的新配合物，其三个ＣｌＯ￣－＿４离子均未参与配位。     

High-Purity Nickel Prepared by Electron Beam Melting: Purification Mechanism

A bulk cylindrical high-purity nickel ingot, with purity of more than 99.999 pct (5N) in mass, was obtained from the raw nickel with 99.95 pct (3N5) initial purity by virtue of double electron beam melting (EBM). A chemical analysis was performed by using glow discharge mass spectrometry (GDMS) analysis for all elements in the periodic table except carbon, nitrogen, and oxygen, which were tested by the high-performance combustion and fusion method. The major impurities B, Na, Al, Si, P, S, Ca, Ti, Cr, Fe, Cu, Co, Zn, As, Ag, Sb, and Pb showed an excellent removal effect with removal efficiency of more than 85 pct following the double EBMs. Li, Mg, Cl, K, V, Mn, Ga, Ge, Cd, Se, In, Sn, Tl, Au, and Pt were below the detection limit. No significant change in concentration was found for the refractory elements W, Mo, Ta, Nb, and Ir. Be, F, Sc, Se, Br, Rb, Sr, Zr, Y, Ru, Rh, Pd, Te, I, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Re, Os, Hg, Bi, Th, and U were not detectable following the purification as compared to the raw nickel. Gaseous impurities, C, N, O, especially for N, was removed sufficiently. Theoretical calculations for removal efficiency of impurity Fe based on the calculated vapor pressure, activity coefficient, and melt temperature were in good agreement with measured results, and the purification mechanism was ascribed to the evaporation of major impurities and subsequently evacuation by repetitive EBM.     

The lithium ion: a foundation for psychopharmacological specificity

The preparation of hair for the determination of elements is a critical component of the analysis procedure. Open-beaker, closed-vessel microwave, and flowthrough microwave digestion are methods that have been used for sample preparation and are discussed. A new digestion method for use with inductively coupled plasma-mass spectrometry (ICP-MS) has been developed. The method uses 0.2 g of hair and 3 mL of concentrated nitric acid in an atmospheric pressure-low-temperature microwave digestion (APLTMD) system. This preparation method is useful in handling a large numbers of samples per day and may be adapted to hair sample weights ranging from 0.08 to 0.3 g. After digestion, samples are analyzed by ICP-MS to determine the concentration of Li, Be, B, Na, Mg, Al, P, S, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ge, As, Se, Rb, Sr, Zr, Mo, Pd, Ag, Cd, Sn, Sb, I, Cs, Ba, Pt, Au, Hg, Tl, Pb, Bi, Th, and U. Benefits of the APLTMD include reduced contamination and sample handling, and increased precision, reliability, and sample throughput.     

A steady state of 3-hydroxy-3-methylglutaryl coenzyme A reductase activity in cultured rat liver cells and the increase of its activity by dexamethasone

Sandoz seed dressing 6335 showing high efficacy in checking the growth of the maize stalk rot pathogen Erwinia carotovora f. sp. zeae Sabet in culture. Brestan, Antracol, Difolatan, Aratan, Duter, Ceresan wet, Flit-406, Cuman, Blitox-50, Streptocycline, Agrimycin, Terramycin, Actidione, Aureomycin, Chloromycetin, Penicillin G, and Streptomycin were moderately effective. The rest of the 35 chemicals was negligible in its influence. 15 different chemicals, namely Agrimycin, Streptocycline, Chloromycetin, Sodium penicillin G, Actidione, Terramycin, Aureomycin, Sandoz seed dressing 6335, Antracol, Aratan, Blitox-50, Diflotan-80, Ceresan wet, Cuman and Brestan 60 could also control the disease, but only when the plants were treated in vivo immediately after inoculation. They could not show any effectiveness, however, after 24, 48, and 72 hours of inoculation, showing their failure to control, once the infection has taken place by the pathogen.     

Alkaloids of Thalictrum. XV. Isolation and identification of the hypotensive alkaloids of the root of Thalictrum lucidum

Sixteen alkaloids, namely homoaromoline, obaberine, O-methyl-thalicberine, oxyberberine, thalidasine, thaliglucinone, thalrugosine, obamegine, oxyacanthine, berberine, columbamine, jatrorrhizine, magnoflorine, palmatine, thalifendine and base A chloride, plus the artifact, 8-trichloromethyldihydroberberine, were isolated from the alkaloid fraction of the roots of Thalictrum lucidum L. Of these, obamegine, thalrugosine, O-methylthalicberine, thaliglucinone, obaberine and homoaromoline were found to possess hypotensive activity in normotensive dogs. Thalidasine, homoaromoline, thalrugosine, thaliglucinone, obamegine, jatrorrhizine, and columbamine were found to possess antimicrobial activity against Mycobacterium smegmatis at a concentration of 100 mug/ml or less.     

Minimum inhibitory concentrations for selected antimicrobial agents against organisms isolated from the mammary glands of dairy heifers in New Zealand and Denmark

Minimum inhibitory concentrations were determined for selected antimicrobial agents against 872 bacteria isolated from intramammary infections in heifers in New Zealand (n = 401) and Denmark (n = 471). These values were reported in micrograms per milliliters. Antimicrobial agents tested against isolates from New Zealand were penicillin, cloxacillin, cephapirin, ceftiofur, novobiocin, enrofloxacin, erythromycin, and pirlimycin. The minimum inhibitory concentrations that inhibit 90% of the strains tested for these antimicrobial agents with Staphylococcus aureus were 4.0, 0.5, 0.5, 2.0, 1.0, 0.25, 0.5, and 1.0, respectively. The minimum inhibitory concentration values that inhibit 90% of the strains tested against the Staphylococcus spp. ranged from 0.5 to 1.0 for all antimicrobics. The minimum inhibitory concentrations against streptococci were < or = 0.06, 0.5, 0.13, 0.13, 4.0, 1.0, 0.13, and < or = 0.06, respectively. Antimicrobial agents tested against isolates from Denmark included penicillin, ampicillin, oxacillin, cephalothin, ceftiofur, penicillin plus novobiocin, erythromycin, and pirlimycin. Against S. aureus, the minimum inhibitory concentrations were 0.13, 0.5, 0.5, 0.5, 1.0, 0.25, 0.5, and 0.5, respectively. The minimum inhibitory concentrations against Staphylococcus spp. were 0.25, 0.25, 0.5, 0.5, 1.0, < or = 0.06, 0.13, 1.0, and 0.5, respectively. The minimum inhibitory concentrations against the streptococci were < or = 0.06, 0.13, 0.5, 0.5, 1.0, < or = 0.06, 0.13, 0.5, and 0.5, respectively. Minimum inhibitory concentration values for staphylococci from New Zealand and Denmark were similar to values reported for US isolates. Streptococci from New Zealand and Denmark had lower minimum inhibitory concentration values than did US isolates. Only ceftiofur and enrofloxacin were active against the Gram-negative bacilli.     

Calculation of Some Properties of the Cubic Oxides of II-VIII Group Metals

Experimental data on the bulk modulus of elasticity, thermal expansion coefficient, specific heat capacity, specific volume, Grueneisen constant, and atomization energy of the cubic monoxides of Mg, Ca, Sr, Cd, Ba, Eu, Th, U, Pu, Ti, Zr, V, Nb, Ta, Cr, Mn, Fe, Co, and Ni were analyzed. Using six correlation relationships values of unknown properties and adjusted values of known properties at 298 K were calculated.     

Sensoristrain: an exploration of nursing interventions in the context of the Neuman systems theory

Platelet-activating factor (PAF), identified as 1-O-alkyl-2-acetyl-sn-glyceryl-3-phosphorylcholine, exhibits potent proinflammatory properties. PAF is produced by numerous cell types, including endothelial cells, neutrophils, monocytes, macrophages, basophils, eosinophils and mastocytes. Since the discovery and identification of the chemical structure of PAF, a large variety of specific PAF-receptor antagonists, both natural and synthetic compounds, have been described. Intensive research has been conducted and development programs set up by more 25 pharmaceutical companies world-wide, studying the therapeutic interest of more than 50 PAF-receptors antagonists in various pathophysiological conditions. Medline (1966-1996), Embase (Excerpta Medica; 1974-1996), and other biomedical and drug directory databases were searched to identify English-language articles (basic science, clinical trial research, and review articles) and abstracts of conference proceedings on PAF receptor antagonists and related terms. The most important PAF receptor antagonists are reviewed with their effectiveness in various experimental tests. Fundamentally, PAF antagonists may be divided in two groups: natural and synthetic compounds. Natural (Ginkgolides, Kadsurenone, Chantancin, Phomactin, Swietemohonin A, Prehispalone, THC-7-oic acid, Aglafoline, FR 900452, PCA 4248 and SCH 37370), and synthetic antagonists (CV-3988, CV-6209, SRI 63-072, SRI 63-441, UR-10324, UR-11353, E-5880, CL 184005, 6-Mono and Bis-aryl phosphate antagonists, TCV-309, Ro-74719, WEB 2086, Y 24180, BN 50726, BN 50727, BN 50730, BN 50739, Ro 24-4736, Ro 24-0238, RP 55778, RP 59227, RP 66681, YM 264, YM 461, SM 10661, SR 27417, UK 74505, BB 182, BB 823, BB 654, SDZ 64-412, SDZ 65-123, L 652731, L 659898, L 668750, L 671284, L680573, L 680574, CIS 19, ABT-299 and Pinusolide) have a great variability in their chemical structure that might have importance in their different pharmacological profile. The great majority of these drugs are under development, and only a few have undergone clinical trials.     

海泡石及改性海泡石在水污染治理中的研究与应用进展

海泡石是一种具有吸附活性的天然硅酸盐黏土矿物,在水污染治理中可作为一种低成本、高效和易再生的吸附剂.介绍了海泡石处理有机染料、含油废水、养殖废水、铝材切削液废水、垃圾渗滤液、腐殖酸、氨氮、微囊藻、果糖、双酚A、丙酮、甲苯、氯苯、六氯丁二烯、苯乙烯、萘、菲、十溴联苯醚、氯草敏、苯噻酰草胺、有机磷、阿特拉津等有机污染物和重金属、有害非金属、硝酸盐、含氟废水、放射性核素等无机污染物的效果.天然海泡石对部分污染物的吸附率较低,而海泡石经物理或化学改性后可明显提高对部分污染物的吸附效果.在此基础上,总结了海泡石作为环境保护用吸附剂存在的问题,并展望了今后的研究方向.      

电感耦合等离子体原子发射光谱法测定高碳除尘灰中11种元素

实验重点探讨了高含量碳对除尘灰样品中镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌等元素测定的影响,并解决了除碳的问题。样品使用马弗炉高温除碳,采用盐酸-硝酸-氢氟酸-高氯酸消解样品灰分,选择了镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌等元素的分析谱线和扣背景模式,建立了使用电感耦合等离子体原子发射光谱法(ICP-AES)测定高碳除尘灰中镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌等元素的方法。在仪器最佳工作条件下,各元素校准曲线线性相关系数r均大于0.999 5,方法检出限在1.08～26.01 mg/kg之间。方法应用于除尘灰实际样品中镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌的测定,结果的相对标准偏差(RSD,n=11)为0.90%～7.1%,目标元素的加标回收率为90%～117%;按照实验方法测定除尘灰中镁、铝、钾、钙、锌,结果与火焰原子吸收光谱法(FAAS)的测定结果相吻合。     

电感耦合等离子体原子发射光谱法同时测定铝土矿中40种组分

采用NaOH熔融分解样品,热水浸取熔融物,加入酒石酸络合钨、钼、铌、钽等易水解元素,然后在盐酸介质中用电感耦合等离子体原子发射光谱法同时测定铝土矿中Al2O3、SiO2、Fe2O3、TiO2、CaO、MgO、K2O、P2O5、MnO、Ga、Ge、V、Li、Cr、Nb、Ta、Sr、Zr、Hf、Sc、La、As、B、Ba、Be、Bi、Cd、Co、Cu、Ni、Pb、Sb、Sn、Tl、Zn、Mo、Se、In、Te和W等40种组分。通过筛选分析谱线、合理设置背景扣除位置及干扰元素校正系数,避免了光谱干扰。方法检出限为 0.05~0.85 μg/g。用本法测定了铝土矿国家标准物质和实际样品中的上述40种组分,测定值与认定值或化学法测定值吻合,测定结果的相对标准偏差（RSD,n=11）在0.15%~5.9%之间。