健脾清幽方联合铋剂四联治疗Hp阳性慢性非萎缩性胃炎40 例临床观察

目的：观察健脾清幽方联合标准四联疗法治疗脾虚湿热型Hp阳性慢性非萎缩性胃炎的临床疗效和安全性。方法：将80 例脾虚湿热型Hp阳性慢性非萎缩性胃炎患者随机分为治疗组和对照组,每组各40 例。对照组予铋剂四联（艾司奥美拉唑镁肠溶片+枸橼酸铋钾片+克拉霉素片+阿莫西林胶囊）治疗,治疗组在对照组基础上加用健脾清幽方治疗。观察2组患者综合疗效、治疗前后中医证候积分、Hp根除率、Hp复发率和药物不良反应。结果：2组综合疗效治疗组为95.00%（38/40）,对照组为85.00%（34/40）,2组比较,差异具有统计学意义（P＜0.05）;2组中医证候总积分治疗前后组内比较及治疗后组间比较,差异均有统计学意义（P＜0.05）;Hp根除率治疗组为95.00%（38/40）,对照组为90.00%（36/40）,2组比较,差异无统计学意义（P＞0.05）;治疗结束3个月后Hp复发率治疗组为2.63%（1/38）,明显低于对照组的16.67%（6/36）,差异具有统计学意义（P＜0.05）。治疗期间,治疗组未出现明显不良反应,对照组出现恶心欲呕3 例,胃脘灼痛1 例,口腔异味1 例。结论：健脾清幽方联合铋剂四联治疗脾虚湿热型Hp阳性慢性非萎缩性胃炎,可提高Hp根除率,有效改善患者临床症状并减轻药物不良反应,安全性较高,适合临床推广应用。     

Dyeing and printing wastewater treatment using fly-ash coated with chitosan

Printing and dyeing industry is a considerable source of environmental contamination. In this study treatment of printing and dyeing wastewater with a new type of sewage treatment agent, fly-ash coated with chitosan particles (FCCP), was examined. The effects of pH, stirring time, sedimentation time and temperature on color, COD, turbidity and NH₃-N removal were determined. The optimum dosage of FCCP and the influence of individual factors on removal efficiency were tested. The optimum parameters determined using the L₁₆(4⁵) orthogonal experiment were as follows: FCCP (weight ratio of chitosan to fly-ash 1:6) dosage, 4 g·L⁻¹; temperature, 35°C; pH, 4. The stirring time and sedimentation time were 20 min and 5 h, respectively. Under these optimum conditions, the color, COD and NH₃-N removal ratios were 97%, 80% and 75%, respectively.     

大黄鱼精液的高效超低温保存

采用2 mL的冷存管和程序降温仪高效超低温保存大黄鱼(Pseudosciaena croce)精液。分析比较了5种不同浓度抗冻剂(二甲基亚砜、乙二醇、丙二醇和甘油和甲醇)、3种降温速率(10,20和30℃/min)和2种解冻温度(28℃和43℃)对大黄鱼精液超低温保存效果的影响。实验结果表明,采用Hanks’作为稀释液,10%～20%甘油或10%DMSO作为抗冻剂,20℃/min的降温速率对精液进行超低温保存43℃水浴解冻,冻精激活后获得理想的运动率(76.6%±11.4%～80.0%±12.6%),而且对10%甘油保存的冻精进行人工授精实验获得了与新鲜精液相似的受精率和孵化率。     

涠洲11-1-A1井酸化实验分析

根据对涠洲11-1-A1井的油层物性、储层特征及敏感性分析,采用醇基酸作为酸化施工主处理液,这样既减少了对开发层位的损害,又保证了处理液对地层有适宜的、较高的溶蚀率,对解除钻井液和固井水泥浆造成的污染堵塞具有明显效果。经过酸液类型及浓度的确定、添加剂的筛选、流动模拟及残酸分析等室内试验研究,确定了适用于该井海上酸化的酸液配方。     

产免疫调节活性多糖海洋放线菌的筛选

用硫酸苯酚法和实验动物模型检测分离于厦门海区潮间带的996株海洋放线菌胞外多糖产量和体内外免疫增强活性.结果表明,33%的海洋放线菌粗多糖产量大于3g/dm3;在粗多糖产量高的海洋放线菌中有3株菌株的胞外多糖在体内外均具有较好的免疫增强活性,其中链霉菌(Streptomyces sp.)2305菌株的胞外多糖具有较高的非特异性、细胞及体液免疫增强活性.研究结果表明海洋放线菌胞外多糖是免疫调节剂开发的重要资源.     

Synthesis and Properties of Poly （n-Octyl Acrylate） with Uniform Polystyrene Grafts

Poly (n-octyl acrylate) with uniform polystyrene grafts (POA-g-PS) was obtained by radical copolymerization of n-octyl acrylate (OA) with PS macromer, in solution. The reactivity ratio and effects of copolymerization conditions on grafting efficiency were studied. The crude products were purified by extraction with cyclohexane and n-butanol successively. POA-g-PS exhibited a very good compatibilizing effect on the acrylic rubber/polystyrene blends. 2%-3% of the graft copolymer was enough for enhancing the tensile strength of the blends. DSC and SEM demonstrated the enhancement of compatibility in the presence of the graft copolymer.     

离子交换技术在火山热液铀钼类型矿石堆浸生产中的应用

本文以上马架子火山热液铀钼类型矿石堆浸采铀开发为例，对离子交换技术回收浸出液中铀的工艺原理、条件和应用进行论述，对两种淋洗剂进行简要的论述和比较，并简要介绍了树脂钼中毒的机理及处理方法，对开发该类型矿床（点）具有一定的参考意义。     

Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province

The accumulation of Pb in the food chain is one of the great concerns as it can cause chronic health problems and the available Pb is easily absorbed by crops. To shed light on Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province, a series of plant growth experiments were performed in a greenhouse to select more suitable extractants from five commonly used extractants (0.1 M HCl, 1 M NH4OAc, 0.1 M CaCl2, DTPA-TEA and Mehlich 3). The results showed that 1 M NH4OAc can extract Pb best, indicating the Pb bioavailability, then, DTPA-TEA and 0.1 M HCl in the tested soils. In case 1 M NH4OAc was used as an extractant, the critical Pb concentrations in soils were 50.19 mg/kg, 21.16 mg/kg and 114.00 mg/kg (1 M NH4OAc extracted Pb) in silty loam, yellowish-red soil and purplish soil, respectively. When the values exceed the above ones, the contents of Pb in Chinese cabbage leaves will exceed the Chinese Tolerance Limit of Lead in Foods (GB14935-94), as a result, potential ecological risk and hazard to human health via the food chain will appear.     

土壤中有效磷的快速测定

用c(NH4 F) =0 .0 15mol/L的NH4 F和c(HCl) =0 .3mol/L的HCl浸提土壤样品中有效磷 ,以钼锑抗分光光度法测定有效磷的含量。在c(H2 SO4 ) =0 .2～ 0 .3mol/L的H2 SO4 和Sb3 + 存在下 ,磷酸与钼酸铵反应形成磷锑钼杂多酸 ,该杂多酸在常温下被抗坏血酸还原为磷钼蓝络合物 ,它的最大吸收波长于 70 0nm处 ,磷量在 0 .0～ 140 0 μg/L范围内服从比尔定律 ,检出限为 0 .0 2 4μg/mL。     

水井酸处理的周期性负压法

针对常规水井酸处理法增产效果有限、对地下水污染严重的问题, 提出了水井酸处理的周期性负压法.该方法通过产生周期性负压, 不断向裂隙中压入井筒里活性较强的酸液, 并及时清除裂隙中的反应产物, 因而使用一次周期性负压法, 具有多次常规酸处理加物理洗井的增产效果; 同时它利用周期性负压和少量多次注酸, 限制水井酸处理的污染范围, 降低对地下水的污染程度.使用结果表明: 与常规水井酸处理法相比, 水井酸处理的周期性负压法可使水井酸处理效果平均提高186%, 酸处理后的污水排出量减少59%.另外, 该方法简便易用, 使用成本低, 可广泛推广应用.