甲状腺机能亢进症头发锌、硒、钒、锂、锗5种微量元素的动态变化

测定了２４例甲亢治疗前后及３０例健康对照的头发锌、硒、钒、锂及锗的含量，发现未治疗的甲亢头发锌、硒、钒、锂及锗含量较对照组低，Ｚｎ、Ｓｅ、Ｌｉ、Ｇｅ，Ｐ＜０．００１，Ｖ，Ｐ＜０．０１．甲亢经６～１２周抗甲亢药物治疗后．头发中５种元素均较治疗前上升（Ｐ＜０．００１），且头发钒和锂含量治疗后已达到对照组水平，Ｖ，Ｐ＞０．２，Ｌｉ，Ｐ＞０．１，而头发锌、晒及锗含量治疗后仍低于对照组（Ｐ＜０　．００１）．结论：甲亢头发锌、硒、钒、锂及锗含量降低．经６～１２周抗甲亢治疗可使头发钒及锂含量恢复正常水平，而其余３种元素则可能需要更长时间的抗甲亢治疗才能恢复至正常水平。     

抗肿瘤中药微量元素硒的研究

与抗肿瘤作用关系密切的中药微量元素主要有Se、Ge、Zn、Cu、Fe、Mn、Mo、I、B、Si、Li等，本文介绍了近年来Se的研究。Se是人体健康必需的超微量元素．与某些地方病、癌的发生关系密切。是同时具备防癌和促免疫两种活性的理想防癌剂。大部分补气、补血、补肾、补阳等中药富含Se等微量元素，具有抗癌等药理作用．特别是人参等12种中药的抗癌作用尤明显。     

Simultaneous Reduction of Nitro Group and S-S Bond in Nitrodisulfides by Samarium Diiodide: A New Approach to Benzothiazolines

Asapowerfulandversatileone-electrontransferreductant,Sml,hasbeenappliedwidelyinorganicsynthesis'.OurpreviousworksonthereductionofnitrocompoundsandreductivecleavageofS-S,Se-Se,Te-TebondswithSml,'ledustoinvestigatethesimultaneousreductionofnitrogroupandS-SbondbySml,.Benzothiazolinesderivativesareimportantreagentsandusefulintermediatesinorganicsynthesisandpharmaceuticalchemistry.Forinstance,theycanbeusedasadditionagentsforphotographicemulsions",effectiveacaricides",antituberculousagents",lubr…     

库仑滴定法测定有机硅样品中的氮含量

本文利用库仑滴定法研究了高分子和低分子硅氮化合物及含氮有机硅样品中氮含量的测定,并研究和讨论了影响测定结果准确性的因素。     

急性脑血管病患者血清元素的测定

采用高频等离子体发射光谱法测定了３４例脑梗塞、３３例脑出血和对照组２７人血清锌、铜、锰、铬、镁、钼、锶、铁、钛、钡、镉和钙共１２种元素的含量。结果显示脑梗塞和脑出血组血清锌和锌／铜比值显著高于对照组；锰和钼含量仅在脑梗塞组明显增高，锶仅在脑出血组显著增高，而其它几种元素疾病组与对照组无显著性差异。伴有高血糖、高血脂和高血压的病人，其血铬含量显著降低，表明锌、锌／铜比值、锰、钼、锶、铬元素与急性脑血     

铜的反催化分光光度法——铜(Ⅱ)-过硫酸钾-甲基红体系

本文提出一种利用铜在乙醇介质中阻抑过硫酸钾氧化甲基红来测定痕量铜的新方法。采用动力学光度法可测定低至0.4ng/ml Cu~(2+)。本法用于水和试剂中的测定,结果令人满意。     

卡尔曼滤波分光光度法同时测定钢中钛和钼

本文采用卡尔曼滤波(KF)递推法,以苯基荧光酮-溴化十六烷基吡啶与钛,钼的显色体系同时测定钛和钼,同时以柠檬酸和抗坏血酸掩蔽干扰,并引入误差校正因子来校正加掩蔽剂后在所测波段范围内所造成的残余背景吸收,用于实际钢样分析,获得较满意的结果。     

Continuous flow structuring of anisotropic biopolymer particles

We review concepts and provide examples for the controlled structuring of biopolymer particles in hydrodynamic flow fields. The structuring concepts are grouped by the physical mechanisms governing drop deformation and shaping: (i) capillary structuring, (ii) shear and elongational structuring and (iii) confined flow methods. Non-spherical drops can be permanently structured if a solidification process, such as gelation or glass formation in the bulk or at the interface, is superimposed to the flow field. The physical and engineering properties of these processes critically depend on an elaborate balance between capillary phenomena, rheology, gel or glass formation kinetics, and bulk heat, mass and momentum transfer in multiphase fluids. This overview is motivated by the potential of non-spherical suspension particles, in particular those formed from ‘natural’ and ‘sustainable’ biopolymers, as rheology modifiers in food materials, consumer products, cosmetics or pharmaceuticals.     

108例甲状腺功能障碍患者全血9种元素相关性研究

通过原子吸收光谱技术对68例治疗前甲亢病人(A组)，35例治疗后甲亢病人(B组)，5例甲减病人(C组)及74例正常人(D组）全血多种微量元素测定分析，结果显示：D组Cu与Al，Mg与Mn正相关；Al与Zn、Se负相关；A组Fe与Zn、Ca，Ca与TT4。Cu与Mn正相关，TT与Zn、Cr负相关。B组Fe与Zn、Cu、Mg，Zn与Cu、Mn、Mg与Ca、Se、Se与TT3正相关。     

肿瘤患者放疗前后血清八种微量元素含量的研究

对临床、病理、放射线或CT检查确诊的82名癌肿患者，在放疗前后和对42名健康人进行了微量元素铁、锌、铜、锰、硒，铬、钴、镍的分析。研究结果显示：1．癌肿患者血清铜、镍、锰、铬、钴的含量比健康人高，而血清锌、铁、硒的含量却比健康人低；2．血清Cu／Zn、Cr／Zn、Co／Zn、Ni／Zn的比值癌肿患者均比健康人高，而Fe、Zn、Se／Zn的比值却相反。因此，可根据血清铜升高、血清锌降低，血清铜／锌比值升高的特点。用于癌肿的早期诊断；3．癌肿患者放疔后血清铁、锌含量进一步下降，铜、锰、铬的含量也出现降低，唯有硒的含量有所上升。因此，放疗时应注意补充铁、锌、铜元素。     

多波长线性回归法用于同时光度测定铁和铜

在弱酸性介质中,在乳化剂OP存在下,铁、铜与PAN形成最大吸收均在550nm处的水溶性有色络合物,两者相互严重干扰。本文采用多波长回归分析法对此混合显色体系进行研究,选择在570～590nm区间,测定11个波长处的吸光度,使用简易程序计算器,进行数据回归处理,可简便快速地直接求出铁、铜的含量。应用于铝合金中铁、铜的同时测定,结果满意。     

Schnelltests zur leistungsfähigkeit von bestimmungsverfahren

Linear analytical functions covering at least a working range of one power of ten are the basis for useful determination procedures. The efficiency of the procedure is given by characteristic data such as constant magnitude of the analytical function, the standard deviation of the procedure and the determination limit. These can be evaluated by systematic standardization, Three simple tests are described to check the possibility of standardization, and a method is given for estimating values of the characteristic data, which requires only 2 sets of 4 experiments each. Thus preliminary work in the development of reliable procedures can be carried out purposefully, with only a few experiments.     

Rearrangement of Hydrolysis Products of Tetrahydrofolate model compound

5,6.7,8-TetrahydrofolateabbreviatedTHFisinvolvedinthebiologicaltransferofonecarbonfragmentatdifferentoxidationlevelsfformyl,formaldehyde,andmethanol.Whenthetransferablecarbonisinformicacidoxidationlevel,thehydrolysisofTHFIgives2and3respectivelyunderdifferentconditions'.(SeeSchemeI)Wehavesynthesizedl,2-dimethy-3-(p--methoxybenzeneiodide4asTHFmodelcompoundattheformicacidoxidationlevelandreporteditssubstitutedone-carbonunittransferreaction2.InordertorevealthehydrolysismechanismofTHF,thehydr…     

Non-aqueous quantitative determination of the carbonyl functional group by constant-current potentiometric titration

A non-aqueous direct titration procedure has been developed for the determination of aldehydes and ketones. It uses two platinum-wire indicating electrodes with a constant current of 0.5 muA. The solvent medium is 0.15M sodium perchlorate in tetrahydrofuran. The titrant is sodium fluorenyl in a mixture of 1,2-dimethoxyethane and tetrahydrofuran. All types of carbonyl compounds react with the sodium fluorenyl, but steric hindrance prevents complete reaction with certain ketones containing bulky groups. The lowest concentration of carbonyl that can be determined with acceptable accuracy and precision is 7.5 x 10(-3)M, the error being < 3% and the precision better than +/-2.5%. Most reducible compounds interfere, e.g., peroxides, acid halides, nitro-compounds, acids, and water, and cannot be differentiated potentiometrically. The method can be extended to other reducible functional groups, e.g., nitro groups and acid chlorides.     

The electronic structure of heteroaromatic molecules; non-empirical calculations and photoelectron spectra for the isomeric-thiazoles and -thiadiazoles

The He(I) and MgKα photoelectron spectra are reported for the isomeric thiazoles, and He(I) spectra for the isomeric-thiadiazoles. Marked fine structure is apparent on some of the spectra. Comparison with the earlier spectra for thiophen and the azoles, and with ab initio calculations for the seven compounds, has led to assignment of the spectra. The calculations suggest that 1,3,4-thiadiazole is less aromatic than the other title compounds. As expected, the role of the 3d_s orbitals is found to be that of polarisation functions for all of the compounds, but inclusion of these orbitals leads to much better agreement with the observed dipole moments, both in magnitude and direction.     

Stereoselective Synthesis of (6R)-6-(5-Methyl-2-furyl)-2-oxocyclohexanecarboxyl-10', 2'-Sultam

PseudolaricacidA(l)whichexhibitsantifungalandantifertilityactivitieswasisolatedfromPeudolarl-xKaenlpjbriGord'.Theabsoluteconfigurationsofthesechiralcenterswereassignedtobe3S,4S,10RandIIRrespectively'.Accordingtotheretrosyfltheticanalysis.theskeletonofIcouldbeconstructedbyintramolecular[4- 31cycloadditiontyomaseven-memberedlactone2(Schemel)whichcouldbeobtainedfrom(6S)-6-Thesynthesisbeganwithbetalprotected0-ketoacid4,tbllowedbyamidationwith(-)-camphorsultamandDCCtoobtainapairofdiastereomer…     

Recherche d'une description structurale des de´compositions endothermique Solide 1 → Solide 2 + gaz. I. Structure cristalline de l'oxalate de baryum 2BaC2O4, H2O

2BaC₂O₄ · H₂O (M = 468.73) is triclinic, space group P1, with a = 9.312(1) A?, b = 9.649(1) A?, c = 6.188(1) A?, α = 90.13(2)°, β = 95.36(2)°, γ = 125.18(2)°, Z = 2, D_m = 3.48; C_x = 3.51g · cm^?3. The position of the Ba atom was determined from a Patterson function. A subsequent Fourier synthesis clearly revealed the position of all C and O atoms in the structure. Refinement of the MoKα diffractometer data by a least-squares method using full matrix gave R = 0.065. The structure presents two remarkable characteristics: (a) We distinguish two types of (C₂O₄)^2? ions. The first are planar, the second are notably separated from the plane configuration (deviation = 30°); this deformation is of a steric origin. (b) The water molecules are located in channels parallel to [001]. They enter in the coordination of one of the Ba²⁺ ions but do not exchange any strong hydrogen bond with oxygen atoms which surround them.     

二茂铁-AQ修饰碳纤维微葡萄糖传感器的研究

本文用二茂铁、AQ成功地制备了微葡萄糖传感器。Eastman-AQ(AQ-55D,AQ29D)是一种新型的聚合物(磺酸酯)阳离于交换剂,涂于电极表面上,形成的膜除具有强的附着力外,同时还具有预富集、离子交换及防污性能。制得的电极具有制作方法简单、快速、重现性好,抗干扰能力强等特点。检测上限15.0 mmol/L,响应时间小于6s。由于AQ强的附着力,二茂铁及酶的流失较小。电极的稳定性有所提高。     

硒的抗突变性作用与机体免疫功能的研究

研究了在三氯甲烷致突变性试验中加入硒的影响。结果显示硒能减少Ａｍｅｓ试验中三氯甲烷诱变的回变菌落数，能使小鼠骨髓嗜多染红细胞微核率和鳙鱼外周血有核红细胞微核率明显下降。并研究了硒在细胞免疫试验中的作用，结果显示硒能使正常鼠和荷瘤鼠的肺和脾的ＮＫ细胞活性提高，能促进其脾Ｔ淋巴细胞的增殖反应，还能增加外周血Ｔ淋巴细胞数。     

Calamistrin E, the First Annonaceous Acetogenin with Double Bond in Aliphatic Chain from Genus Uvaria

Annonaceous acetogenins are considered as the main components with cytotoxicity inthe plants of Annonaceae family. The genus Uvaria is one of the main plants containingAnnonaceous acetogenins, and more than fifty acetogenins have been isolated from eightspecies of the title genus"', however, acetogenins with double bond in the aliphatic chainhas not yet been reported. In this paper we report the structure elucidation of calamistrinE (l), a new acetogenin bearing one double bond besides a tetr…