Pd／Ag纤维覆铜触点的制备及其金相组织

用ＡＮ１／ＷＳ型卿钉机加工由挤压法和包套法制备Ｐｄ／Ａｇ５２纤维复铜触点，并进行微观结构剖析，指出挤压更适用于ＡＮ１／ＷＳ型卿钉生产复铜触点。寿命试验后微观结构剖析表明，触点在试验过程中始终保持纤维状态，不会明显形成固溶体合金。     

DMPAQ的合成及其与钯的显色反应

合成新试剂ＤＭＰＡＱ，其结构经红外光谱和元素分析证实。研究了阳离子表面活性剂溴化十四烷基吡啶（ＴＰＢ）存在下试剂与钯的显色反应。在酸性介质中，ＤＭＰＡＱ与钯形成１：１的绿色络合物，其最大吸收峰位于５９０ｎｍ，摩尔吸光系数为５．８×１０＾４Ｌ．ｍｏｌ＾－＾１．ｃｍ＾－＾１。钯量在０－１５μｇ／２５ｍｌ符合比尔定律。方法可不经分离直接用于钯催化剂和微量钯的测定。     

Crystallographic and electrical study of the chromium substituted ferrous zinc copper ferrites

The structural and electrical properties of the oxidic spinel Zn_0·5Cu_0·5Fe _x Cr_2−x O₄ (x=0·8, 0·9, 1·0, 1·1) have been investigated through X-ray diffraction, electrical resistivity, and thermoelectric measurements. X-ray diffraction data showed formation of single spinel phase with cubic structure. D.C. resistivity measurements from room temperature to 850 K was carried out and activation energy for all the compositions evaluated. Thermoelectric measurements showedp-type semiconducting nature in all the samples.     

钯—硫醚及■叶立德配合物的合成和表征

氯化-3,3-二氟-2-丙烯基二甲基锍及溴化乙氧甲酰甲基二甲基锍分别与钯的卤化物反应,生成双(3,3-二氯-2-丙烯基二甲基锍)四氯钯(Ⅱ)和双(乙氧甲酰甲基二甲基锍)六溴二钯(Ⅱ)。进一步反应转变为配合物。二氯双(3,3-二氟-2-丙烯基甲基硫醚)合钯(Ⅱ)和二溴双(二甲基乙氧甲酰甲基■叶立德)合钯(Ⅱ)。开通过元素分析、红外光谱、核磁共振谱等测试结果确定了它们的结构。     

二硝基甘脲结晶条件研究

介绍了用硝酸重结晶及用硝硫混酸硝化甘脲直接制备二硝基甘脲晶体的方法及用二甲基亚砜制备二硝基甘脲晶体的结果。还讨论了硝酸浓度、混酸硝化系数、稳定处理温度、时间、搅拌等因素对二硝莽甘脲晶体大小的影响。     

Polymer Complexes XLV. Spectral Studies on Metal-Ligand Bonding in Novel Poly-Schiff Base Complexes

Polymer complexes derived from cinnamaldehyde and 2-substituted aniline with Cu(II), Pd(II), Pt(II), UO₂(II), Rh(III), Ru(III), and Pd(IV) have been synthesized and characterized by IR, electronic, EPR, ¹H-NMR, and ¹³C-NMR spectra, as well as by elemental analysis, thermogravimetry, and magnetic susceptibility measurements. The important bands in the IR spectra and the main ¹H- and ¹³C-NMR signals are assigned and discussed in relation to molecular structure. The wavelengths of the principal electronic absorption peaks have been accounted for quantitatively in terms of crystal field theory and various parameters were evaluated. The complexes, [Ru(HL _n )Cl₃] _n , are penta-coordinate; and, a trigonal-bipyramidal environment is commensurate for the Ru(III) ion. The presence of a coordinated water molecule in complex the Cu(II) complex (20) was demonstrated by thermogravimetry. The compounds, [N-(3-phenylacrylidene)-2-mercaptoaniline] (HL₁) and cinnamaldehyde-2-aminophenol (HL₂), act as monobasic and neutral bidentate ligands. The B-value suggests a strong covalency in the metal-ligand -bond. Tentative structures of the polymer complexes are proposed.     

太白大曲性能对出酒率和优质品率的影响

太白大曲以大麦、豌豆为原料。采用中高温发酵而成。按培曲品温控制及大曲特性可分为青茬曲、红心曲和槐瓤曲。不同品种的太白大曲其糖化力、液化力、发酵力和生香能力各不相同。经试验证明。太白大曲科学搭配、合理使用是提高太白酒产质量的重要技术措施。按青茬曲30％、红心曲30％和槐瓤曲40％组成混合曲,传统工艺操作,搭配使用,其出酒率和优质品率分别比单一大曲提高0．77％～2．40％和8．92％～13．80％。     

Multicomponent complexes of piroxicam with cyclodextrins and hydroxypropyl methylcellulose

The purpose of the study was to investigate the effect of hydroxypropyl methylcellulose (HPMC) on the complexation of piroxicam (PX) with β-cyclodextrin (β-CD) and dimethyl-β-cyclodextrin (DM-β-CD) in solution and in the solid state. Phase solubility study revealed a positive effect of the polymer on the drug complexation. Improvement in stability constants values, K_s, of ternary complexes clearly proves the benefit of the HPMC addition for promoting higher complexation efficiency. Solid binary and ternary complexes were prepared by spray drying. Drug-CD and drug-CD-polymer interactions were studied in the solid state by differential scanning calorimetry (DSC), zeta-potential measurements, and particle size distribution. A marked increase in the PX dissolution rate was observed even in binary and ternary complexes. The presence of HPMC in ternary complexes slightly retarded the release of PX. Cyclodextrin complexation increased the PX concentration gradient over the semipermeable membrane, resulting in an increased PX flux. The retarded diffusion of PX to the membrane interface decreased the PX flux values of the ternary complexes.