聚苯胺/涤纶导电纱线的制备

以涤纶纱线为基材制备涤纶/聚苯胺导电纱线。采用正交试验分析pH值、苯胺、过硫酸铵的用量对导电性能的影响。通过对比实验观察碱减量预处理的效果;利用万用表对复合纱线导电性能进行测量。结果表明:碱减量预处理非常必要,当pH值为2~3,苯胺用量为10 g,过硫酸铵质量为2g时导电纱线的电阻率最低,为96Ω·cm。     

滑动弧放电等离子体法用于二甲醚重整制氢简

Gliding arc gas discharge plasma was used for the generation of hydrogen from steam reforming of dimethyl ether （DME）. A systemic procedure was employed to determine the suitable experimental conditions. It was found that DME conversion first increased up to the maximum and then decreased slightly with the increase of added water and air. The increase of total feed gas flow rate resulted in the decrease of DME conversion and hydrogen yield, but hydrogen energy consumption dropped down to the lowest as total feed gas flow rate increased to 76 ml. min^-1. Larger electrode gap and higher discharge voltage were advantageous. Electrode shape had an important effect on the conversion of DME and production of H2- Among the five electrodes, electrode 2# with valid length of 55 mm and the radian of 34 degrees of the top electrode section was the best option, which enhanced obviously the conversion of DME.     

基于ST-CSLBP的混合时空背景建模算法

针对背景建模方法对场景光照变化较为敏感,提出融合时间预测和空域纹理信息设计全新的时空-对称ST-CSLBP算子,构建基于ST-CSLBP直方图的混合时空背景模型,融合时域分布统计法和空域背景各自的优势,以同时适应长时光照以及短时的光照变化.实验表明,该算法与现有背景建模算法相比,具有较好的准确率和检索率.     

气溶胶粒子在裂隙中穿透特性实验研究

为研究气溶胶颗粒通过房屋裂隙进入室内的穿透特性,用铁质矩形裂隙在实验室进行模拟实验研究。结果表明:气溶胶粒径、气体流速和裂隙高度对气溶胶的穿透率影响比较显著;流速和裂隙高度增加会增大气溶胶的穿透率;不同粒径的气溶胶在相同实验条件下穿透率存在明显差异,最易穿透的是粒径在0.5μm左右的粒子,小粒子和大粒子分别在Brownian扩散作用和重力沉降作用下穿透率低。     

Effects of phospholipid hydroperoxide glutathione peroxidase mRNA expression on meat quality of <Emphasis Type="Italic">M. longissimus dorsi</Emphasis> in pigs

Antioxidant enzymes protect muscle tissues against oxidation from reactive oxygen species and increase the stability of the muscle. Phospholipid hydroperoxide glutathione peroxidase (GPx4) is an important antioxidant enzyme in muscle tissue. So the aim of this study was to identify the effects of mRNA expression level of GPx4 gene on meat quality properties in Longissimus dorsi of three pig breeds. Total 36 pigs (12 pigs for each breed) were used to measure the meat quality properties and to analyze the expression levels of GPx4 gene by quantitative real-time PCR. The results showed that meat quality, GPx4 activity, and GPx4 mRNA levels were affected by pig breeds. There were the lowest expressible moisture, drip loss, and cooking loss in Laiwu Pig among the three breeds, and also there were the highest GPx4 activity and the expression levels of GPx4 gene in Laiwu Pig compared with the other two pig breeds. Analysis of meat samples divergent for water-holding capacity identified highly negative associations between expressions levels of GPx4 gene and expressible moisture, drip loss and cooking loss. These results suggest that the higher mRNA expression level of GPx4 gene up-regulate the water-holding capacity and the activity of GPx4, and the expression of GPx4 gene plays an important role in physiological changes related to the meat quality properties and the mechanisms of the antioxidant ion of meat.     

发酵液中1,3-丙二醇分离提取的研究进展

1,3-丙二醇是合成聚乳酸的主要原料,以甘油为底物的生物法制备1,3-丙二醇是以绿色化学为特征的技术。但1,3-丙二醇极性很强、微生物发酵液成分较复杂,产品收率偏低,质量难符合制备高性能聚对苯二甲酸丙二醇酯的要求,故1,3-丙二醇的分离提纯成为了生物法合成技术的关键。对于1,3-丙二醇发酵液,提纯过程包括发酵液预处理、脱盐和浓缩提纯。本文讨论了用于1,3-丙二醇提纯的主要技术,包括采用离心、过滤、絮凝脱大分子物质,用离子交换、电渗析、双水相萃取或有机溶剂沉淀等方法脱盐类,及通过精馏、萃取、吸附对发酵液浓缩提纯,或是以上某几个分离工艺的组合。提出整个分离工艺仍存在很多问题,对各工艺路线不断进行优化,开发新的经济高效的分离提取工艺路线,是目前实现规模化生物法生产1,3-丙二醇的技术重点。     

油茶壳高品位资源化利用的Py-GC/MS分析

采用Py-GC/MS联机技术研究油茶壳高品位资源化的利用.新鲜油茶壳经冷冻干燥除水后,于590 ℃的He气流中进行热解,然后对热解产物进行GC/MS联机分析,采用色谱峰面积归一化法计算各组分的相对含量,并鉴定出46个化合物.分析结果表明,油茶壳热解产物富含名贵生物医药、名贵香料成分,副产物不仅可用于高档化妆品和护肤品,还可用于生物能源以及食品、染料、工业溶剂等的原料.     

6111铝合金板材加工过程中组织的演变

研究了6111铝合金板材生产加工过程中显微组织的演变。结果表明:其铸态组织为α-Al基体及沿枝晶间分布的化合物,另外还有一些内部结构较为细小的球形组织组成物。均匀化处理后,枝晶间的化合物发生一定程度的溶解而球形组织组成物消失。热轧后,化合物呈颗粒状分布于α-Al基体上,而冷轧对化合物颗粒无明显影响;在随后的固溶处理时基体发生再结晶。     

现代大客车技术分析

通过对国内外大客车三大总成的最新技术进行分析，探讨我国大客技术的发展方向。     

积极响应总公司号召扎实有效地搞好润滑油生产经营

介绍了茂名石化公司总公司９５润滑油工作会议后在加强润滑油生产经营管理方面所作的工作，以及为全面实施基础油新标准，促进产品升级换代，进一步搞好润滑油生产经营拟采取的措施，包括成立协调领导小组，实行专业化管理，大力整顿调合厂，大力推进技术进步以及改进营销策略等等。