苏丹混合原油加剂常温输送工艺研究

对苏丹输油管道的加剂常温输送工艺进行了研究,介绍了苏丹混合原油降凝剂的研制开发、分析了加剂苏丹混合原油流变性和模拟技术以及结蜡规律,在借鉴已有的应用加剂综合处理输送技术的基础上,成功地将该项技术应用于苏丹外输管道,该项技术的应用,减少了一次性管道建设的投资,节省了大量的燃油费,取得了良好的经济效益.     

BEM-5 P原油降凝剂试验效果与应用

介绍了大港油田混合外输原油添加BEM—5P原油降凝剂在室内试验和现场试验的情况，分别在两条长输管道上进行了现场加剂试验，BEM—5P原油降凝剂对大港混合原油的改性效果得到了验证，同时预测评价了大港油田低输量长输管道降凝输送的经济效益。     

The effect of phenyl phosphorodiamidate on urease activity and ammonia volatilization in flooded rice

Summary The behaviour of urease activity, ammoniacal N concentrations and pH in flood water and that of ammonia flux was investigated in a water-logged soil either in the presence or in the absence of rice and with three different treatments (control, urea and urea + phenyl phosphorodiamidate). In the presence of the phenyl phosphorodiamidate (PPD), that is a urease inhibitor, increases in ammoniacal N concentrations and in ammonia evolution were delayed but not eliminated. The degradation and/or the inactivation of PPD might have occurred, thus removing the inhibition of the enzyme activity.     

云贵高原干季室内热环境参数关系研究

基于我国住宅建筑室内热环境研究的不足,以曲靖师范学院一自然通风房间为对象,对其室内温度、湿度、风速、墙面温度、地板温度、天花板温度、室外环境温度进行了为期半年的实地测试,对室内空气平均温度、平均辐射温度、PMV(predicted mean vote)值和PPD(predicted percentage of dissatisfaction)值进行了计算.为便于快捷预测和调控云贵高原干季室内热环境,利用线性回归分析法对室内外主要参数间的关系进行了讨论,获得了一些相关性较好的回归方程,在相似气候下对热环境预测和设计可供参考.     

降凝剂对模拟油中蜡析出的影响

研究了降凝剂(PPD)对模拟油中蜡析出的影响,用高速离心机对特定温度下析出的蜡进行了分离,得到了加剂前后不同温度下的析蜡量;用气相色谱法测定了降凝剂以及模拟油加剂前后析出的蜡的碳数分布及烷烃含量。试验结果表明,不同温度下的析蜡量均减少,降凝剂浓度为0.2%和0.5%时降低的趋势几乎一致,浓度为1%的降凝剂在相对低温时对蜡的析出有很大的抑制作用;析出的蜡与原蜡在碳数分布上有一定的区别,析出的蜡碳数呈双峰分布;降凝剂对模拟油中小碳数烷烃的析出有抑制作用,而对碳数较大的烷烃的析出有促进作用。     

新疆部分地区牛结核病PPD监测与分析

2001年-2003年对新疆部分地区（巴州、阿克苏、博州、伊犁、昌吉、塔城和石河子）牛结核病用“提纯结核茵素皮内变态反应”进行调查,调查数据用SPSS软件统计建立模型,显示2001年-2003年七地州检测牛只分别为16793,21153头和43951头,阳性率分别为0．46％,0．33％和0．57％。其中,巴州地区阳性率明显偏高。昌吉和石河子地区2001年-2002年保持一个较低的水平,2003年牛结核病的阳性率较前两年升高了1％。     

两个茶薪菇菌株胞外酶活性的测定与分析

采用液体发酵的方法,对两个茶薪菇菌株进行了两种胞外酶活性的测定分析,结果表明:茶薪菇两个菌株超氧化物歧化酶的活性均呈先下降后上升的变化趋势,回升后的最高值均在0.9U左右;菌株901多酚氧化酶活力先迅速下降,后稳定,菌株902先稳定,后快速上升,最高达到0.1U,两菌株间差异显著。茶薪菇902是筛选出的优良菌株。     

降凝剂工业试验中流程卸压取样的方法

新疆三化线进行了加KD-1降凝剂现场工业试验,在石化分输站出现了凝点严重反弹现象。经过分析,判断为"范县现象",即针型阀带压取样使样品以及凝点测试结果失真。通过采用流程卸压取样的方法,证实了该判断并获得了真实的油样和凝点数据。以彩石沙混油加剂40mg/L处理的测试结果为例,说明了流程卸压取样的实施方法和效果。     

斯盘增进聚丙烯酸酯类原油降凝剂效果的研究

针对高蜡原油的高凝点问题,通过自由基聚合得到了聚丙烯酸十八醇酯,丙烯酸十八醇酯-马来酸酐-苯乙烯共聚物(SL)降凝剂.借助红外光谱和1H核磁共振谱图分析了产物的结构.考察了斯盘对SL降凝作用的影响,探讨了SL与斯盘复配的降凝机理.     

Mapping wound-response genes involved in post-harvest physiological deterioration (PPD) of cassava (Manihot esculenta Crantz)

The genome locations of the wound-response genes that were expressedduring the post-harvest physiological deterioration (PPD) of cassava, suchas phenylalanine ammonia lyase, -1.3 glucanase, hydroxyprolinerich glycoprotein, catalase, 1-aminocyclopropane 1-carboxylate, cysteineprotease inhibitor, aspartic protease, a partial cDNA for serine/threonineprotein kinase and peroxidase, have been identified on the frameworkmolecular genetic map of cassava. Also, molecular markers linked toputative quantitative trait loci (QTLs) influencing PPD of cassava weremapped using an F₁mapping population derived from elite parentallines (TMS 30572 × cm 2177-2). A molecular linkage map previouslyconstructed based on the segregation of 240 RFLP, 100 RAPD, 85microsatellite and five isoenzyme markers on 144 F₁ individuals wasused for the QTL mapping.A set of 10 molecular markers with a significant association with putativeQTLs for PPD were identified based on probability values < 0.005in order to minimize the detection of false positives. Based on single-markerregression, eight putative QTLs located on the linkage groups G, P, L, U,and X of the female-derived framework map were found to explain between 5–12% of the phenotypic variance of the PPD. In the male-derived frameworkmap, two putative QTLs on linkage groups C and L explained 13% and11% of this variance, respectively. This study thus identified the majorgenome regions of cassava related to physiological post-harvestdeterioration, thereby providing tools for the identification of gene(s)controlling this trait.