电控化油器系统及应用

随着国Ⅲ排放法规的实施,摩托车尾气净化技术越来越得到充分的认识.使用电控化油器系统就是通过采集发动机工作状态的信号,经ECU处理发出指令,控制化油器旁通电磁阀的适时开启,从而能有效控制发动机始终处于最佳空燃比状态.采用氧传感器进行反馈控制,可以使电控系统具有更好的适应性.     

Cr（acac）3的制备及其谱学性能研究

本文利用CrC13·6H2O和配体乙酰丙酮反应合成乙酰丙酮铬,通过正交试验确定最佳的反应条件。对样品进行X衍射图谱、紫外-可见吸收光谱、红外吸收光谱以及拉曼光谱等光学性质表征。结果表明,制得的乙酰丙酮铬属于单斜晶系,配合物的紫外特征吸收峰属于π→π＊跃迁和n→π＊。跃迁,其红外及拉曼的特征谱图表明,分子内部以乙酰丙酮羰基O原子与Cr（Ⅲ）配位。结合光谱分析,表明实验条件下乙酰丙酮铬相关的结构特征良好。     

铬(Ⅲ)与α-甲基丙烯酸根配合物的合成及结构表征

合成了Cr(Ⅲ)与α-甲基丙烯酸根配合物,进行了元素分析,红外光谱研究,确定配合物的组成为Cr2(H2O)8(CH2=C(CH3)-COO-)2Cl4,测定了它的晶体结构,晶体属单斜晶系P21/c,晶胞参数:a=0.5327(12)nm,b=0.9984(10)nm,c=1.6139(7)nm,最终因子β=114.98(3)°,z=4,R=0.0699,Cr(Ⅲ)具有畸变的八面体配位环境,两个Cr(Ⅲ)由两个α-甲基丙烯酸根桥联。     

用椰壳制活性炭吸附去除三价铋离子(英文)

In present study,we report the preparation of coconut shell activated carbon as adsorbent and its appli-cation for Bi(Ⅲ) removal from aqueous solutions.The developed adsorbent was characterized with scanning elec-tron microscope(SEM),Fourier Transform Infrared(FTIR),C,H,N,S analyzer,and BET surface area analyzer.The parameters examined include agitation time,initial concentration of Bi(Ⅲ),adsorbent dose and temperature.The maximum adsorption of Bi(Ⅲ)(98.72%) was observed at 250 mg·L-1 of Bi(Ⅲ) and adsorbent dose of 0.7 g when agitation was at 160 r·min-1 for 240 min at(299±2) K.The thermodynamic parameters such as Gibb’s free energy(△Gθ),enthalpy(△Hθ) and entropy(△Sθ) were evaluated.For the isotherm models applied to adsorption study,the Langmuir isotherm model fits better than the Freundlich isotherm.The maximum adsorption capacity from the Langmuir isotherm was 54.35 mg?g?1 of Bi(Ⅲ).The kinetic study of the adsorption shows that the pseudo second order model is more appropriate than the pseudo first order model.The result shows that,coconut shell ac-tivated carbon is an effective adsorbent to remove Bi(Ⅲ) from aqueous solutions with good adsorption capacity.     

Fast removal of cyanobacterial toxin microcystin-LR by a low-cytotoxic microgel-Fe(Ⅲ) complex

Eutrophication has become a serious environmental threat throughout the world. In particular, the presence of cyanobacteria toxins, especially microcystins (MCs), has become a severe problem. Inhibition of Microcystis growth in water resources is the most effective way to reduce MCs, but it is a long-term investment. In the present study, a microgel-Fe(Ⅲ) complex was developed for the fast removal of MC-LR. The microgel-Fe(Ⅲ) characteristics and the MC-LR removal dynamics in Milli-Q water and natural water were evaluated. The removal efficiency negatively correlated to the initial MC-LR concentration and pH value (2.0-11.5), but the kinetics was not significantly influenced. The presence of natural organic matter (NOM) in water slightly reduced MC-LR removal using microgel-Fe(Ⅲ). In addition, microgel-Fe(Ⅲ) removed 98.99% of MC-LR in 12 min, while for activated carbon, it took 15-24 h to reach equilibrium. Furthermore, methanol was found to regenerate the microgel-Fe(Ⅲ) after MC-LR removal for at least five regeneration cycles. Finally, the microgel-Fe(Ⅲ) material was made into a membrane so that MCs could be removed by filtration. Therefore, microgel-Fe(Ⅲ) is an effective technology and has a great potential in removing MC-LR from drinking water resources.     

珠三坳陷文昌组中深湖相烃源岩新的生物标志化合物组合模式与油源对比

原油样品和不同相带烃源岩样品的地球化学分析结果表明,珠三坳陷文昌组中深湖相烃源岩具有低丰度C304-甲基甾烷,并在C29甾烷上有强共逸出峰(X峰),这种新的生物标志化合物组合模式在南海北部盆地尚属首次提出。依据这一新的生物标志化合物组合模式对珠三坳陷油源重新进行了对比分析,认为文昌B凹陷主力烃源岩是文昌组中深湖相烃源岩,文昌A凹陷主力烃源岩是恩平组河沼相烃源岩;文昌B凹陷区原油的主要贡献者是文昌组中深湖相烃源岩,文昌A凹陷区原油的主要贡献者是恩平组河沼相烃源岩,而琼海凸起西区原油主要源自文昌B凹陷文昌组中深湖相烃源岩,琼海凸起东区原油则主要源于文昌A凹陷恩平组河沼相烃源岩。     

微波治疗机（HYJ-Ⅲ）治疗非坏疽性糖尿病足90例疗效观察

目的：观察微波治疗机（HYJ-Ⅲ）治疗对非坏疽性糖尿病足其疗效及安全性。方法：选择非坏疽性糖尿病足患者90例,按住院号末位单双号分组的原则分为试验组（45例）和对照组（45例）,对照组采用常规治疗,试验组采用常规治疗加微波治疗机（HYJ-Ⅲ）治疗,动态观察及比较糖尿病足的愈合效果。结果：两组比较,试验组显著优于对照组（P〈0．05）,两组均未发现明显不良反应。结论：微波治疗机（HYJ-Ⅲ）能促进糖尿病足患者创面的愈合,缩短住院时间,方便、舒适,无不良反应。     

芳纶Ⅲ纤维的原纤化研究

对芳Ⅲ纤维进行原纤化处理并对原纤化过程中纤维的形态结构变化进行了研究。SEM观察发现:芳Ⅲ纤维在原纤化过程中出现皮层剥落、结构疏松、轴向劈裂、进一步解离从而实现原纤化。对制备的芳Ⅲ原纤化浆粕进行表征,结果表明制得的浆粕打浆度达到60°SR,保水值为261%,比表面积9.42m2/g,结晶度42.49%。     

Ⅲ级粉煤灰与水泥浆体的微界面改性

采用电石渣对Ⅲ级粉煤灰进行高温煅烧改性,利用X射线衍射(XRD)、扫描电子显微镜(SEM)和纳米划痕仪对改性Ⅲ级粉煤灰的矿物组成和表面形貌进行表征,研究了改性Ⅲ级粉煤灰的水化性能,对比分析了未改性和改性Ⅲ级粉煤灰与水泥浆体的微界面形貌和力学性能.结果表明:改性Ⅲ级粉煤灰表面生成了水化活性较好的β-C2S,其水化生成的C-S-H凝胶改善了Ⅲ级粉煤灰颗粒与水泥浆体的微界面,减少了微界面区的孔隙,提高了微界面的力学性能.     

阴丹士林艳绿FFB的间接电化学还原

The indirect electrochemical reduction of Indanthrene Brilliant Green FFB (IBG) was investigated in detail by cyclic voltammetry and electrolytic experiments. Triethanolamine (TEA) was used as ligand to form electrochemically active Fe(Ⅲ)-complexes in alkaline solution. The effects of operating parameters including reaction temperature,current density, concentration of NaOH and Fe(Ⅲ)-TEA mediator had been studied by orthogonal experiments and the mechanism of radicals on electrochemical reduction was discussed. The cyclic voltammetry experimental results show that Fe(Ⅲ)-TEA complexes are well suited for the indirect electrochemical reduction of IBG The electrolytic experiments show that high current efficiency (49.9%) can be successfully achieved under optimized conditions and the current density is found to be the main influence factor.