Studies on Thiosemicarbazides and Related Heterocycles(ⅩⅩⅥ)──Synthesis of 3-[5'-amino-1'-(4"-chlorophenyl)-1',2',3'-triazol-4'-yl]-4-aryl-1,2,4-triazoline-5-thiones

ＳｔｕｄｉｅｓｏｎＴｈｉｏｓｅｍｉｃａｒｂａｚｉｄｅｓａｎｄＲｅｌａｔｅｄＨｅｔｅｒｏｃｙｃｌｅｓ（）Ｓｙｎｔｈｅｓｉｓｏｆ３┐［５┐ａｍｉｎｏ┐１┐（４＂┐ｃｈｌｏｒｏｐｈｅｎｙｌ）┐１，２，３┐ｔｒｉａｚｏｌ┐４┐ｙｌ］┐４┐ａｒｙｌ...     

Catalytic Oxidative Dehydrogenation of Isobutane over KF-Zn_3(PO_4)_2

ＩｎｔｒｏｄｕｃｔｉｏｎＡｌｔｈｏｕｇｈｔｈｅｃａｔａｌｙｔｉｃｄｅｈｙｄｒｏｇｅｎａｔｉｏｎｏｆｉｓｏｂｕｔａｎｅｉｎｔｏｉｓｏｂｕｔｅｎｅｈａｓｂｅｅｎｃａｒｒｉｅｄｏｕｔｉｎｃｏｍｍｅｒｃｉａｌｐｌａｎｔｓｏｖｅｒＣｒ２Ｏ３－Ａｌ２Ｏ３ｏｒｎｏ...     

石墨炉原子吸收光谱法测定血浆,胸水和尿中的铂

本文研究了石墨炉原子吸收光谱法测定顺氨氯铂在人的血浆、胸水及尿中铂浓度的方法。样品无需预先处理,加入Triton X—100后,可对标准溶液直接测定,不需要加入空白血浆。其方法简便、灵敏度高、重复性好,适用于临床生物样品的测试。检出限为5ppb,绝对灵敏度为7×10~(11)g/0.0044A,线性范围为50—800ng/ml,变导系数(4个浓度)为1.93—2.18%(n=10),回收率(5个浓度)为96.1—107.6%。     

Preparation and Spectral Characterization of 3-Benzyl-6-aryl-1,2,4-triazolothiadiazoles

Introduction1 ,2 ,4- Triazolo[3,4- b][1 ,3,4]thiadiazoles arecondensed heterocyclic compounds having wide-ranging application.They combine the propertiesof triazoles[1] and thiadiazoles[2 ] ,as a result,someof them show antimicrobial,antiinflammatory,fungicidal,antiviral,inhibiting plant pathogenicbacteria,herbicidal,plant- growth regulating,andother activities[3— 5] .Attaching an active methyleneto the fused heterocycle maybe change itsbioactivity.Moreover,hydrogens in the methylenebetween t…     

新型茚基膦金配合物的合成及其在炔烃水合反应中的催化作用研究

合成了四种新型茚基膦金配合物,其结构经1H NMR,31P NMR和元素分析表征,同时,两种配合物的结构通过X射线单晶衍射确证.化合物2能高效地催化炔烃水合反应,该催化反应具有反应条件温和、催化剂用量少、原子经济性好、对环境友好等优点.     

Adsorption of Cr(VI) on ureolytic mixed culture from biocatalytic calcification reactor

Ca-rich water and wastewater have caused problems in water use, wastewater reuse and the operations of reactors treating Ca-rich wastewater. Nowadays, reuse of wastewaters is fast gaining importance as water sources have been polluted. Therefore, the concept of biocatalytic calcification reactors (BCR) based on urea hydrolysis, pH increase and calcite production has been studied to remove Ca from wastewaters. This biological process produces significant amounts of waste sludge. In the present study, Cr(VI) adsorption on the ureolytic mixed culture (UMC) waste by-product from BCR was investigated to evaluate its potential for metal removal. The biosorption process was investigated using equilibrium batch tests and the data were fit to the Langmuir, Freundlich and Temkin isotherm models. The Cr(VI) ion concentration dependence of sorption (1-100 mg/L) could be fit to the Langmuir isotherm model. Monolayer adsorption capacity, qm (mg/g), of the adsorbent was 8.67 and the Langmuir constant b (L/mg) was 0.881. Based on the obtained results, the waste UMC appears to be a potential biosorbent for the removal of Cr(VI) from wastewater, although its adsorptive capacity is lower than those of other biosorbents.     

木质素灰分含量控制及其影响研究

木质素是自然界中含量最丰富的天然芳香族高分子,含有丰富的碳元素,是制备碳纤维的理想原料。但是,工业木质素的杂质含量普遍较高,不能满足碳纤维制备要求。为此,本文采用盐酸沉析、离心分离和酸洗的方式对某种国产工业木质素进行纯化处理,考察了盐酸用量及纯化次数对木质素灰分含量的影响,并采用GPC、FT-IR和DSC研究了木质素的分子量、化学结构和反应活性随纯化处理次数的变化规律。结果表明:随着纯化次数的增加,木质素的灰分含量大幅降低,反应活性显著提高;随着盐酸用量的增加,在一次提纯时,木质素的灰分含量先大幅降低,当浓盐酸与木质素的质量比大于0.6:1时,木质素的灰分含量趋于稳定;经四次纯化处理后,木质素的灰分含量降低至0.77%。     

Studies on the Side Chain Liquid Crystalline Copolymer Containing Nonlinear Optical Groups *

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｏｒｇａｎｉｃｎｏｎｌｉｎｅａｒｏｐｔｉｃａｌｍａｔｅｒｉａｌｓａｒｅｃｕｒｒｅｎｔｌｙｔｈｅｓｕｂｊｅｃｔｏｆｍａｎｙｒｅｓｅａｒｃｈｐｒｏ－ｇｒａｍｓ,ｏｗｉｎｇｔｏｔｈｅｉｒｐｏｔｅｎｔｉａｌａｐｐｌｉｃａｔｉｏｎ...     

共聚单体对水相合成聚丙烯腈及其湿纺纤维结构与性能的影响

水相自由基聚合具有快速、高效的特点,是开发大规模、低成本的聚丙烯腈(PAN)基碳纤维原丝生产技术的首选工艺。本文采用该工艺制备了丙烯腈-衣康酸(P(AN-IA))和丙烯腈-醋酸乙烯酯(P(AN-VAc))两种共聚物,再经溶解和湿法纺丝将其制成纤维。采用傅里叶变换红外光谱仪(FT-IR)、场发射扫描电子显微镜(SEM)、旋转流变仪、旋转粘度计、X-射线衍射仪(XRD)和差式扫描量热/热重同步分析仪(DSG/TG)对比研究了两种共聚单体对水相合成PAN聚合物及其湿纺纤维结构与性能的影响。结果表明,与醋酸乙烯酯(VAc)相比,衣康酸(IA)降低了PAN聚合物的颗粒团聚程度和溶液粘度,显著提高了PAN纤维的截面圆整度和结构致密性,大幅降低了热稳定化反应起始温度、提高了热稳定性。这主要归因于IA的两个羧基基团。其改善了PAN聚合物的亲水性,使凝固过程更加缓和;减弱了氰基间的作用力,提高PAN分子链的运动性;能够诱导氰基在低温下发生环化反应。     

Studies on Liquid Crystalline Bis[4-(p-phenoxy)-phenylbenzoate]-Alkyldicarboxylate

ＳｔｕｄｉｅｓｏｎＬｉｑｕｉｄＣｒｙｓｔａｌｉｎｅＢｉｓ［４┐（ｐ┐ｐｈｅｎｏｘｙ）┐ｐｈｅｎｙｌｂｅｎｚｏａｔｅ］Ａｌｋｙｌｄｉｃａｒｂｏｘｙｌａｔｅ＊ＸＩＮＧＰｅｉ－ｘｉａｎｇ,ＴＩＡＮＹａｎ－ｑｉｎｇ,ＷＡＮＧＪｕｎ－ｚｕｏＮＡＨｕｉ,Ｔ...