DSA引导下经皮入路应用无水乙醇联合聚桂醇治疗头颈部高回流型静脉畸形的安全性和有效性

目的探讨数字减影血管造影(DSA)引导下经皮入路应用无水乙醇联合聚桂醇治疗在头颈部高回流型静脉畸形中的应用效果。方法选取2020年2月至2023年6月在河南大学第一附属医院就诊的68例头颈部高回流型静脉畸形患者,根据治疗方法进行分组,即经DSA引导下经皮入路应用聚桂醇治疗的患者纳入对照组,经DSA引导下经皮入路应用无水乙醇联合聚桂醇治疗的患者纳入研究组。统计两组临床疗效、不良反应及并发症发生情况。结果两组一般资料比较,差异无统计学意义(P>0.05)。与对照组83.33%的临床有效率相比,研究组(97.37%)较高,差异有统计学意义(χ^(2)=4.105,P=0.043)。与对照组43.33%的不良反应及并发症总发生率相比,研究组(10.53%)较低,差异有统计学意义(χ^(2)=9.623,P=0.002)。结论DSA引导下经皮入路应用无水乙醇联合聚桂醇治疗头颈部高回流型静脉畸形安全有效,具有广泛的临床应用前景。

DSA引导下经皮入路无水乙醇联合聚桂醇治疗头颈部高回流型静脉畸形

目的探讨DSA引导下经皮人路应用无水乙醇联合聚桂醇治疗头颈部高回流型静脉畸形的安全性和有效性。方法回顾性分析2012年8月至2016年6月收治的72例头颈部高回流型静脉畸形，在DSA引导下经皮穿刺硬化治疗的临床资料。根据硬化治疗方法将病例分成A、B2组，A组37例以无水乙醇结合聚桂醇进行治疗，B组35例仅以聚桂醇治疗。术后随访12-24个月，平均14．3个月，比较2组的临床效果及术后不良反应。使用SPSS19．0对数据进行统计分析，2组有效率和不良反应发生率采用矿检验，以P〈0．05为差异有统计学意义。结果A组37例，10例治愈，21例基本治愈，3例有效，3例无效，总有效率91．9％（34／37）；平均注射3．2次，每例平均使用无水乙醇13．6ml，聚桂醇泡沫硬化剂220mg。B组35例，5例治愈，15例基本治愈，4例有效，11例无效，有效率68．6％（24／35），每例平均注射次数4．8次，每例平均使用聚桂醇泡沫硬化剂322mg。2组有效率比较差异有统计学意义（x2=6．245，P〈0．05），不良反应主要有组织坏死、神经损伤、张121受限，组间比较差异无统计学意义（P〉0．05）。结论DSA引导下经皮入路应用无水乙醇结合聚桂醇治疗头颈部高回流型静脉畸形是一种安全有效、并发症较轻的硬化治疗方法。

改良型A^2/O工艺在高寒地区污水处理工程中的应用

针对高寒地区市政污水处理厂建设运行过程中出现的问题,在现行工艺基础上进行改良,提出了改良型A2/O工艺,该工艺实现了一体化结构、低溶氧、高污泥浓度、大表面积曝气、大回流比循环等技术改进。运行期间出水COD平均为38.7mg/L,去除率平均为86.5%;出水氨氮平均为1.6mg/L,去除率平均为94.3%;出水总氮平均为10.3mg/L,去除率平均为75.7%。

BioDopp生化工艺处理高海拔地区市政污水

研究了低温条件下中试BioDopp工艺对于低碳氮比市政污水中污染物的去除效果。结果表明,BioDopp工艺稳定运行阶段控制运行参数为回流体积比20倍左右,DO的质量浓度0.3~0.8 mg/L、水温9~12℃时,出水COD平均为35.66 mg/L,NH_(3^-)N、TN的质量浓度平均分别为1.0、11.67 mg/L,达到了设计出水排放标准。同时确定BioDopp生化工艺与芽孢杆菌结合应用时,适宜DO的质量浓度应控制为0.3~0.8 mg/L。

BioDopp工艺处理己内酰胺生产废水的中试研究

本文采用改良后的BioDopp工艺进行中试研究,探讨了其对己内酰胺生产废水的处理效果。中试装置稳定运行阶段,进水CODcr平均浓度为1686 mg/L,出水降低至318 mg/L;进水NH_(3)-N平均浓度为202.4 mg/L,出水降低至2.2 mg/L;进水TN平均浓度为386 mg/L,出水降低至28 mg/L。出水满足《污水排入城镇下水道水质标准》(GB/T 31962—2015)的A标准。实验结果表明:BioDopp工艺高回流比的特点有效提高了系统的脱氮效果和抗冲击能力,而低溶解氧的运行方式则保证了高回流比的混合液不会携带过多的溶解氧到缺氧区,从而影响缺氧区的反硝化反应。

后金融危机时期高科技人才流动态势与抉择

在人口红利优势日渐式微的背景下,加速留学海外的高科技人才回流是增强支撑我国经济发展升级版人力资本存量的关键性战略选择。立足于实现中国梦,我国急需抓住后金融危机呈现的人力资本流动性增强态势,调整政策与创新制度以促成更多优秀高科技人才回归我国新一轮经济发展大潮,发挥海外高科技人才在科技领域取得的先进成果、学术影响以及具备的国际视野等优势,从而加速助推实现中国梦。

BioDopp污水处理工艺应用

Bio Dopp工艺利用空气提推混合液作为介质,实现回流及推流。通过特殊的结构设计实现污泥筛选和固液两相分离,各处理单元有机结合,节省占地面积40%以上。工程实践证明,采用Bio Dopp工艺处理碎煤加压气化废水,在DO<0.3mg/L的条件下,实现了对CODCr平均98.5%的去除率,对NH3-N 99.6%的去除率,当进水总酚平均浓度为927.3mg/L时,出水总酚<0.51mg/L。

Using Path Analysis to Identify the Influence of Climatic Factors on Spring Peak Flow Dominated by Snowmelt in an Alpine Watershed

Spring snowmelt peak flow （SSPF） can cause serious damage. Precipitation as rainfall directly contributes to the SSPF and influences the characteristics of the SSPF, while temperature indirectly impacts the SSPF by shaping snowmelt rate and determining the soil frozen state which partitions snowmelt water into surface runoff and soil infiltration water in spring. It is necessary to identify the important and significant paths of climatic factors influencing the SSPF and provide estimates of the magnitude and significance of hypothesized causal connections between climatic factors and the SSPF. This study used path analysis with a selection of five factors - the antecedent precipitation index （API）, spring precipitation （SP）, winter precipitation as snowfall （WS）, 〈0℃ temperature accumulation in winter （[ATNI）, and average 〉0℃temperature accumulation in spring （AT） - to analyze their influences on the SSPF in the Kaidu River in Xinjiang, China. The results show that {ATN}, AT and WS have a significant correlation with the SSPF, while API and SP do not show a significant correlation. AT and WS directly influence the SSPF, while as the influence of[ATN] on SSPF is indirect through WS and AT. The indirect influence of [ATN[ on SSPF through WS accounts for 69% of the total influence of [ATN] on SSPF. Compared to the multiple linear regression method, path analysis provides additional valuable information, including influencing paths from independent variables to the dependent variable as well as direct and indirect impacts of external variables on the internal variable. This information can help improve the description of snow melt and spring runoff in hydrologic models as well as the planning and management of water resources.

The Effect of Coal Fly Ash Treatment with NaOH on the Characters and Adsorption Capacity toward Pb（Ⅱ） in the Solution

Coal fly ash （CFA） generated by coal-based thermal power plants is mainly composed of some oxides having high crystallinity, including quartz and mullite. In this study, the effect of CFA crystallinity toward its capacity on Pb（Ⅱ） adsorption was investigated. CFA with various crystaUinity was obtanied by refluxing it with sodium hydroxide （NaOH） solution having various concentrations （1-7 M） at various temperature and reflux time. To evaluate the effect of crystallinity of treated CFA on the adsorption capacity, adsorption of Pb（Ⅱ） solution with treated CFA was carried out. The research shows that the reflux of CFA with NaOH solution leads to the crystallinity of quartz and mullite in CFA decreased. The decrease is proportional with the concentration increasing, the temperature elevation, and the longer time. The reflux using NaOH solution with high concentration （〉 3 M） in addition causes a decrease in the crystallinity of quartz and mullite, also results in the formation of hydroxysodalite. The decrease of the CFA crystalllinity gives an increase in CFA adsorption capacity toward Pb（Ⅱ） solution.

发酵液回流对餐厨垃圾厌氧消化的影响

针对厌氧发酵液回流可提高厌氧系统性能,而不适的回流比例又会造成系统酸化的现象,采用单相连续反应器研究了发酵液回流及不同回流比对餐厨垃圾厌氧消化过程的影响。结果表明:在1 gVS/L的有机负荷下进行三种比例(10%、30%、50%)的发酵液回流使系统日平均产气量比不回流阶段分别提高0.7%、13.0%、4.9%,且对气体甲烷含量无显著影响。回流使VFA降解更充分,也使系统缓冲能力得到调节,但在较高的回流比(50%)下会造成Na+积累从而抑制系统产气性能。