污染土壤电动修复正交试验研究

通过正交试验研究了电动修复Cr6 污染高岭土过程中施加电压、处理时间、含水率、阴极电解产生OH一控制4个因素对污染物去除率和电能消耗的影响.试验选用重铬酸钾作为污染物,配制高岭土中Cr6 初始含量为500mg·kg-1.试验结果表明:阴极pH控制对cr6 去除率影响最大,其次为施加电压和处理时间,含水率影响最小;电压对电能消耗的影响最大,其次为时间和含水率,阴极pH控制对电能消耗影响最小.分析表明控制阴极pH是提高污染土壤电动修复效率的优先选择.     

Analysis of Mechanical Properties Related to Fiber Length of Closed-Loop-Recycled Offcuts of a Thermoplastic Fiber Composites (Organo Sheets)

Increasing demand for energy-efficient means of transport has steadily intensified the trend towards lightweight components. Thermoplastic glass fiber composites (organo sheets) play a major role in the production of functional automotive components. Organo sheets are cut, shaped and functionalized by injection molding to produce hybrid components, such as those used in car door modules. The cutting process produces a considerable amount of production waste, which has thus far been thermally recycled. This study develops a closed mechanical recycling process and analyzes the different steps of the process. The offcuts were shredded using two shredding methods and implemented directly in the injection-molding process. Using tensile tests and impact bending tests, the material properties of the recycled materials were compared with the virgin material. In addition, fiber length degradation via the injection-molding process and the influence of the waterjet-cutting process on the mechanical properties are investigated. Recycled offcuts are both comparable to new material in terms of mechanical properties and usability, and are also economically and ecologically advantageous. Recycling polypropylene waste with glass fiber reinforcement in a closed loop is an effective way to reduce industrial waste in a sustainable and economical production process.     

脂血标本的核酸定量检测效果评价

目的评价脂血标本的核酸定量检测实时扩增曲线,以探讨此类标本进行HBVDNA定量检测的可接受性。方法建立扩增曲线观察法、扩增效率Grubbs离散值分析法及扩增效率置信区间估计法,评价接收脂血标本进行荧光定量PCR法HBVDNA定量检测的有效性。结果该2批次扩增的各样品扩增效率数值未发现离散值,3例脂血标本的扩增效率在同批样品扩增效率的90％置信区间内,与扩增曲线观察法结果一致。结论3种评价方法均对修正标准操作程序以接收该类标本提供了支持性的依据。     

珍珠散协同爱宝疗治疗重度宫颈糜烂的临床疗效与药物经济学研究

目的观察中药珍珠散协同爱宝疗浓缩液治疗重度宫颈糜烂临床疗效和药物经济学效益。方法将有生育要求的Ⅲ度宫颈糜烂患者111例随机分为治疗组和对照组,治疗组用中药珍珠散联合爱宝疗浓缩液治疗,对照组则单用爱宝疗浓缩液治疗,均每3d治疗一次。45d后,比较两组疗效、疗程及治疗费用。结果治疗组治愈率明显高于对照组(67.9%vs36.4%),差异有统计学意义(P<0.05)。治疗组费用明显低于对照组[(371.6±138.4)vs(483.6±36.6)]元(P<0.01)。治疗组治疗时间比对照组显著缩短[(32.4±12.1)vs(44.0±3.3)]d(P<0.01)。治疗组中提前结束治疗患者多于对照组(35/56vs6/55,P<0.05)。治疗组与对照组均未见副作用发生。结论珍珠散协同爱宝疗浓缩液治疗重度宫颈糜烂疗效好,药物经济学效益高,值得临床推广。     

轻度认知障碍老年人脑电的非线性相互依赖脑网络分析

本研究旨在初步探究患轻度认知障碍(MCI)的老年人及正常老年人进行情绪调控时的大脑网络特性.记录了14位MCI患者及18个正常人进行认知重评的情绪调控实验时的头皮脑电信号(EEG),包括中性观看、负性观看和负性重评任务.并采用非线性相互依赖性的方法衡量不同频段的大脑区域间的连接强度,然后根据非线性相互依赖性指数构建两组...     

超临界二氧化碳法制备紫杉醇脂质体

目的介绍制备紫杉醇脂质体的新方法。方法采用超临界二氧化碳沉析技术制备紫杉醇脂质体。结果通过试验确定了最佳反应条件,即超临界压强为20 MPa,温度45℃,时间30 min,膜材配比(卵磷脂∶胆固醇)为3∶1,原药与膜材的质量比为1∶20,乙醇的质量分数为20%。在此条件下所制脂质体的包封率为76.18%。结论用此方法制备的脂质体包封率高,因此这是一种较好的脂质体制备方法。     

Strained Lattice Gold-Copper Alloy Nanoparticles for Efficient Carbon Dioxide Electroreduction

Electrocatalytic conversion of carbon dioxide (CO₂) into specific renewable fuels is an attractive way to mitigate the greenhouse effect and solve the energy crisis. Au_nCu_100-n/C alloy nanoparticles (Au_nCu_100−n/C NPs) with tunable compositions, a highly active crystal plane and a strained lattice were synthesized by the thermal solvent co-reduction method. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) results show that Au_nCu_100−n/C catalysts display a subtle lattice strain and dominant (111) crystal plane, which can be adjusted by the alloy composition. Electrochemical results show that Au_nCu_100−n/C alloy catalysts for CO₂ reduction display high catalytic activity; in particular, the Faradaic efficiency of Au₇₅Cu₂₅/C is up to 92.6% for CO at −0.7 V (vs. the reversible hydrogen electrode), which is related to lattice shrinkage and the active facet. This research provides a new strategy with which to design strong and active nanoalloy catalysts with lattice mismatch and main active surfaces for CO₂ reduction reaction.     

人体胎盘脂多糖辅助治疗初治菌阳肺结核患者疗效及细胞因子观察

目的观察人体胎盘脂多糖辅助治疗初治菌阳肺结核疗效及细胞因子的变化.方法将60例初治菌阳肺结核患者随机分为治疗组和对照组,两组各为30例,均用相同的抗结核治疗,治疗组加用人体胎盘脂多糖.结果治疗二个月后,治疗组痰菌阴转率为96.7%,X线病灶吸收好转率93.3%;与对照组80%,70%,相比较差异有显著性(P＜0.05).T淋巴细胞亚群和血清细胞因子IL-4治疗前后及IFN-γ两组比较均有差异显著(P＜0.01),未见明显副作用.结论人体胎盘脂多糖与化疗药物联合应用可提高初治菌阳肺结核疗效,使用安全.并能提高患者细胞免疫,使初治菌阳阴转率高,病灶吸收快.     

Therapeutic Effectiveness of Sustained Low‐Efficiency Hemodialysis Plus Hemoperfusion and Continuous Hemofiltration Plus Hemoperfusion for Acute Severe Organophosphate Poisoning

There is no report on the effects of sustained low‐efficiency dialysis (SLED) plus hemoperfusion (HP) (SLED + HP) in patients with acute severe organophosphate (OP) poisoning (ASOPP). This study was designed to compare the therapeutic effectiveness between SLED + HP and continuous hemofiltration (CHF) plus HP (CHF + HP) in patients with ASOPP. In order to assess the two treatment methods, 56 patients with ASOPP were divided into CHF + HP group and SLED + HP group. The biochemical indicators, in‐hospital duration, hemodynamic parameters, Acute Physiology, and Chronic Health Evaluation (APACHE II) score, and survival and mortality rates were compared. In both groups after treatment, the levels of serum creatine kinase isozyme MB, creatine kinase, creatinine, glutamic‐oxalacetic transaminease, and glutamate‐pyruvate transaminase, and the APACHE II scores on the first, second, and seventh day decreased (P < 0.05), whereas the levels of serum acetylcholinesterase increased. The two groups showed no statistical differences in in‐hospital duration, biochemical indicators, APACHE II score, hemodynamic parameters, survival rate, or the mortality rate (P > 0.05). In conclusion, SLED has similar hemodynamic stability to CHF and the two treatment methods have similar effects on ASOPP patients. More importantly, SLED plus HP is relatively economical and convenient for patients with ASOPP in clinical practice.     

18F-氟代脱氧葡萄糖正电子发射断层成像/CT与同机CT对弥漫大B细胞淋巴瘤患者淋巴结及结外病灶的诊断价值对比

目的 比较18F-氟代脱氧葡萄糖电子发射断层成像/CT(18F-FDG PET/CT)与同机CT显像对弥漫大B细胞淋巴瘤(DLBCL)淋巴结及结外病灶的诊断价值.方法 选取48例经病理确诊为DLBCL的患者,行18F-FDG PET/CT全身显像检查,对比分析18F-FDG PET/CT与同机CT对DLBCL患者受累淋巴结和结外病灶的检出率,以及对淋巴结、结外病灶的诊断效能.结果 经手术或活检病理发现,299枚可疑受累淋巴结中确诊受累淋巴结272枚,90处可疑受累结外病灶中确诊受累结外病灶84处.18F-FDG PET/CT对受累淋巴结检出率为86.29%,高于同机CT的74.92%(P<0.05);18F-FDG PET/CT诊断受累淋巴结、受累结外病灶的敏感性、准确度均优于与同机平扫CT图像(P<0.05).结论 18F-FDG PET/CT对DLBCL患者受累淋巴结、受累结外病灶的诊断效能高于同机CT.