煤基间接制油产业链研究

大连(抚顺)石油化工研究院通过对煤间接制油分析表征,充分利用其硫、氮、芳烃含量低以及链烷烃含量高等特殊秉性,通过工艺条件的优选和催化剂的改进研究,开发了煤间接制油加氢精制、加氢裂化、异构脱蜡、分子可控合成以及长链烷烃发酵等系列高效利用成套技术,系列技术可以生产马达燃料和合成基础油、高链烷烃轻质白油、长链二元酸、液体石蜡、固体石蜡、特种蜡以及API Ⅲ+类4cSt和6cSt润滑油高档基础油等高价值产品。高价值产品丰富了煤基间接制油产业链的产品品种,为企业调整产品结构,提高经济效益提供有效技术支持。

新型蓬松嵌段硅油SH-572的制备及应用

对聚醚氨基嵌段共聚硅油合成进行改进,制备了蓬松型嵌段硅油SH-572,探讨了引发剂用量及环己基偶联剂用量对蓬松型嵌段硅油SH-572整理织物性能的影响,将其用于织物的柔软整理并与市场同类产品进行比较。结果表明,蓬松型嵌段硅油SH-572合成优化工艺为:聚合温度105℃、聚合时间2.5 h、引发剂用量0.3%、环己基偶联剂用量为0.9%,制备的蓬松型嵌段硅油SH-572环氧率为96%,耐高温、耐碱稳定性良好,能够满足生产的要求;采用蓬松型嵌段硅油SH-572的乳液对棉织物和涤纶织物进行整理,具有较好的蓬松性,且整理后织物的白度值为83,比市场上的整理剂更优。

Constraints on the diversity of crude oil types in the Lunnan Oilfield,Tarim Basin,NW China

Hydrocarbons, include heavy oils, normal oils, waxy oils and light oils, condensate oils and gases were all found in Lunnan Oilfield, the occurrences of hydrocarbons with complicated physical properties indicates a complicated distribution of reservoirs. By the drilling data, the distribution pattern had been found that, in plan view, the density of crude oils in the western part is heavier than that of oils in the eastern part in Lunnan region, namely the crude oils were mainly found in the western part while the natural gases were mainly found in the eastern, which shows that an obvious differentiation in the east and west part was presented in the Lunnan region. Furthermore, in vertical view, the light hydrocarbons were mainly found in the Carboniferous reservoir while the heavier hydrocarbons were mainly found in the Ordovician and Triassic reservoirs. By analysis of the semi-logarithm distribution of n-alkanes, biomarker ratios and stable carbon isotopic compositions of crude oils, we have found

脑小血管病患者血清神经丝轻链蛋白与脑白质高信号及认知损害的相关性研究

目的 探究脑小血管病(CSVD)患者血清神经丝轻链蛋白(NFL)与脑白质高信号(WMH)和血管性认知损害(VCI)的相关性。方法 纳入2021年6月至2022年6月在新乡医学院第一附属医院神经内科住院的151例血管源性WMH患者作为研究对象,依据简易智能评估量表(MMSE)、蒙特利尔认知评估量表(MoCA)分为血管性认知损害69例(VCI组)和无血管性认知损害82例(N-VCI组)。比较两组患者的一般资料,采用酶联免疫吸附法检测两组血清NFL水平,并使用Fazekas量表对WMH严重程度进行评分。结果 VCI组血清NFL水平为(54.56±7.95)pg·mL^(-1),显著高于N-VCI组(35.09±6.73)pg·mL^(-1),VCI组Fazekas评分[M(IQR)]为[5(4,6)]明显高于N-VCI[2(1,2)],差异均有统计学意义(均P<0.05)。Logistic回归分析示血清NFL水平是VCI的影响因素(OR=1.493,95%CI:1.301~1.713,P=0.001)。相关分析结果显示:血清NFL水平与MoCA评分呈负相关(r=-0.305,P=0.011),与Fazekas量表总分、脑室旁及深部白质评分呈正相关(分别r=0.895、0.779、0.806,均P<0.001)。趋势性卡方检验结果示,随着不同部位(脑室旁、深部白质)WMH等级的增加,出现VCI的比例升高(P<0.05)。结论 血清NFL与WMH、VCI具有相关性,血清NFL是WMH患者发生VCI的重要影响因素。