连续性肾脏替代疗法治疗重症急性胰腺炎的效果观察

目的观察连续性肾脏替代疗法（CRRT）对重症急性胰腺炎（SAP）的治疗效果。方法38例SAP患者随机分为传统组（n=19）和CRRT组（n=19）,检测两组在治疗前后的血清TNF-αI、L-6水平、APACHEⅡ评分和血气分析指标变化,并对两组的预后进行评价。结果治疗后72 h,传统组的血清TNF-α、IL-6水平明显高于治疗前,CRRT组的血清TNF-αI、L-6水平则明显低于治疗前,CRRT组的APACHEⅡ评分下降较传统组明显,差异均有统计学意义（P〈0.01）;治疗后两组的pH、HCO3-、PaO2和PaO2/FiO2值均明显高于治疗前,但以CRRT组增加更为明显（P〈0.05或0.01）;CRRT组的机械通气、手术冲洗引流及死亡人数也比传统组少,但差异未达统计学意义（P〉0.05）。结论CRRT治疗能降低SAP患者血清TNF-αI、L-6等炎症因子水平,减轻全身炎症反应,可改善SAP患者的预后。     

Effects of aerobic conditions in the rhizosphere of rice on the dynamics and availability of phosphorus in a flooded soil – A model experiment

The secretion of O₂ by rice roots results in aerobic conditions in the rhizoshere compared to the bulk flooded soil. The effect of this phenomenon on the adsorption/desorption behavior and on the availability of phosphorus (P) in a flooded soil was investigated in a model experiment. An experimental set‐up was developed that imitates both O₂ release and P uptake by the rice root. The results showed that O₂ secretion significantly reduced P adsorption/retention and increased P desorption/release in the “rhizosphere” soil, compared to the anaerobic bulk soil. The P uptake by an anion exchange resin from both unfertilized and P‐amended soil was significantly increased. The results confirm that the O₂ secretion is an important mechanism to enhance P availability and P uptake of rice under flooded conditions, where the “physico‐chemical” availability of P in the anaerobic bulk soil is strongly reduced. The decrease of P availability in the P‐amended flooded bulk soil was mainly associated with the almost complete transformation of the precedingly enriched Al‐P fraction into Fe‐bound P with extremely low desorption/release characteristics during the subsequent flooding.     

漆酚硼衍生物的研究(Ⅳ)──硼酸漆酚酯的聚合反应

硼酸漆酚酯具有较漆酚更易聚合的特性。根据元素分析、热分析、红外光谱、紫外光谱、核磁共振氢谱和电子自旋共振谱等的测试结果认为：硼酸漆酚酯的聚合反应发生于其不饱和侧碳链基上；该不饱和碳链基在干燥空气中进行游离基聚合；其分子中的硼原子对该游离基聚合反应具有催化作用。     

探析高职高专图书馆读者服务工作

高职高专图书馆是完成学校教学任务和实现学校总体目标的重要机构。目前,高校图书馆正向着从优化资源建设结构、整合文献资源、构建公共服务平台、扩大文献信息服务能力、提升高数图项目建设效益、构建学校文献保障体系、服务地方经济文化建设等方面发展,对图书馆读者服务的要求越来越高。针对如何做好高职高专学校图书馆读者服务,提出一些自己的思考及建议。     

Effect of dietary lysine on growth,intestinal enzymes activities and antioxidant status of sub-adult grass carp (Ctenopharyngodon idella)

The dietary lysine requirement of sub-adult grass carp (460 ± 1.5 g) was assessed by feeding diets supplemented with grade levels of lysine (6.6, 8.5, 10.8, 12.9, 15.0 and 16.7 g kg^?1 diet) for 56 days. The test diets (28 % CP) contained fish meal, casein and gelatin as sources of intact protein, supplemented with crystalline amino acids. Weight gain (WG), feed intake and feed efficiency were significantly improved with increasing levels of lysine up to 12.9 g kg^?1 diet and thereafter declined (P < 0.05). Quadratic regression analysis of WG at 95 % maximum response indicated lysine requirement was 10.9 g kg^?1 diet. Activities of trypsin, chymotrypsin, lipase, Na⁺, K⁺-ATPase and alkaline phosphatase in intestine, creatine kinase activity in proximal and mid-intestine responded similar to WG (P < 0.05). In addition, lipid and protein oxidation decreased with increasing levels of lysine up to certain values and increased thereafter (P < 0.05); the anti-hydroxyl radical capacity, dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione-S-transferase (GST) activities and glutathione content were increased with increasing dietary lysine levels up to certain values in the detected tissues, except for hepatopancreatic GST. Requirement estimated on the basis of malondialdehyde content in intestine and hepatopancreas was 10.6 and 9.53 g lysine kg^?1 diet, respectively.     

木荷空舟蛾生物学特性及其防治研究

木荷空舟蛾Vaneeckeia pallidifascia是近年来木荷林出现的重要害虫之一.采用室内外养虫及林间调查相结合的方法对木荷空舟蛾的生物学观察结果如下:在广州1年完成4代,以幼虫在土壤中越冬;幼虫为7龄,成虫有性二型现象;在26℃时,卵期4.20±0.71 d,幼虫期33.35±1.06 d,蛹期10.27±1.08 d.在木荷林中,9～10月种群数量最大,对木荷造成严重的危害;选用4.5%高效氯氰菊酯、1%阿维烟剂、苏云金杆菌Bt、25%灭幼脲III号和5%锐劲特对木荷空舟蛾幼虫进行防治试验,杀虫效果分别为100%、92.4%、71.4%、68.1%和61.1%.     

Our Country Water Conservancy Project Management Innovation Strategy Analysis

从中国水利工程管理的重要性出发,讲解水利工程管理的主要内容,并在此基础上提出提高中国水利工程管理水平的创新策略方法:转变工程管理人员的观念,提升水利工程管理科技含量,强化工程管理的认识,扩大资金投入力度和加强水利工程管理人员培养.     

几种无土栽培轻型基质对番茄幼苗生长的影响

选择草炭、蛭石、菌糠、牛粪等不同的轻型基质设施条件下进行番茄无土栽培育苗。不同配比的基质分别在5％和1％水平上不同程度地影响着番茄幼苗的开展度、茎租、茎干重、根干重和根体积等幼苗生长指标。2份草炭加1份蛭石的基质配比对番茄幼苗根系生长最为有利。     

粘弹体防腐材料研制及其应用

介绍了中国石油天然气管道科学研究院自主研制的粘弹体防腐材料的生产设备、技术参数以及工艺流程,并根据GB／T4472—84、DIN30670—91、SY／T0414-2007、ISO21809-2008和GB／T23257-2009相关标准,对该材料70℃阴极剥离、120d热水浸泡、23℃剥离强度、剪切强度、绝缘电阻率、密度、冲击强度、吸水率等性能进行了跟踪测试,结果表明：各项性能指标均符合相关标准要求。该材料在西气东输二线补口、阀室、站场等已广泛应用,具有良好的防腐性能,基本确保了西气东输二线管道的安全运行。