改进型铜基甲醇合成催化剂XH401的DTA研究

５．０ＭＰａ压力下活性评价结果表明，改进型四组份铜基甲醇合成催化剂ＸＨ４０１（Ｃｕ－Ｚｎ－Ａ１－Ｍ）初始活性比工业三组份铜基甲醇合成催化剂Ｃ２０７（Ｃｕ－Ｚｎ－Ａｌ）提高约２７％，耐热试验后ＸＨ４０１合成甲醇活性比Ｃ２０７高约８５％．两种催化剂的ＵＴＡ对比试验显示，工作态ＸＨ４０１催化剂的热稳定性明显优于Ｃ２０７催化剂

r DNA sequence analysis and morphological redescription of Empoasca onukii from the tea growing area of Fujian

重新描述了小贯小绿叶蝉的形态结构,尤其是头部色斑、翅脉、腹部内突、下生殖板及其刚毛着生位置,并增加了足部(刺毛列)特征描述。通过PCr技术克隆得到该物种的r dnA序列,包括部分18S(1 843bP)和28S序列(667 bP)以及完整的5.8S(155 bP)、ITS1(3 114 bP)和ITS2序列(1 008 bP)。序列分析表明,18S,5.8S,28S与其他物种间具有90%~95%的序列一致性;而ITS1和ITS2序列变异性非常大。碱基组成比率分析显示ITS1以及ITS2具有AT偏好性,前者A+T占66.0%,后者占65.1%。与亲缘种的比较分析显示ITS1和ITS2具有丰富的多态位点,并且ITS2更适用于近缘种的分子鉴定。The morphological structures of Empoasca onukii,the cephalic splashes,vein,abdominal apodemes,subgenital plate and the arrangement of its bristles,and the characteristics of legs were redescribed,especially the arrangement of spines were added.Ribosomal DNA( r DNA) including partial of 18S( 1 843 bp),28S( 667 bp) and complete 5.8S( 155 bp),ITS1( 3 114 bp),ITS2( 1 008 bp) were isolated by PCR technology.Sequence analysis indicated that 18 S,5.8S and 28 S had high sequence identity( 90%- 95%) with other insects; however,ITS1 and ITS2 showed much variability.The analysis of base composition showed that ITS1 and ITS2 were more preferences for AT( contained 66.0% and 65.1% A + T,respectively).Comparison with the phylogenetic species revealed that ITS1 and ITS2 from E.onukii had rich polymorphic loci and ITS2 was more suitable for molecular identification of closely related species.国家自然科学基金(81171595

新型甲醇合成联醇催化剂XNC208投入中试生产

新型甲醇合成联醇催化剂ＸＮＣ２０８投入中试生产（ＥｎｌａｒｇｅｄＰｒｏｄｕｃｔｉｏｎｏｆＸＮＣ２０８ＣａｔａｌｙｓｔｆｏｒＭｅｔｈａｎｏｌＳｙｎ０ｔｈｅｓｉｓ）杨意泉，张鸿斌，林国栋，车长针（厦门大学化学系）潘章文，龚鑫荣，董远群，陈雷（南京催化剂厂..

新型甲醇合成联醇催化剂XNC208投入中试生产

新型甲醇合成联醇催化剂ＸＮＣ２０８投入中试生产（ＥｎｌａｒｇｅｄＰｒｏｄｕｃｔｉｏｎｏｆＸＮＣ２０８ＣａｔａｌｙｓｔｆｏｒＭｅｔｈａｎｏｌＳｙｎ０ｔｈｅｓｉｓ）杨意泉，张鸿斌，林国栋，车长针（厦门大学化学系）潘章文，龚鑫荣，董远群，陈雷（南京催化剂厂..

SURVEY OF MIXED INFECTIONS OF FISH-BORNE TREMATODES IN PINYUAN COUNTY AND DNA(RAPD)ANALYSIS

目的　调查广东省平远县棘隙吸虫及其他鱼源性吸虫混合感染情况。方法　对鱼类宿主取鱼鳃和鱼肉等组织 ,镜检囊蚴 ;用水洗过筛沉淀法粪检虫卵 ,部分虫卵阳性动物解剖检查。采用DNA -RAPD技术 ,比较福建棘隙吸虫广东株与福建株。结果　查出华支睾吸虫 (Clonorchissinensis)、东方次睾吸虫 (Metorchisorientalis)、福建棘隙吸虫 (Echinochasmusfujianensis)、日本棘隙吸虫 (E japonicus)、抱茎棘隙吸虫 (E perfoliatus)和钩棘单睾吸虫 (Haplorchispumilio) 6种。第二中间宿主为麦穗鱼等 11种 ,感染率 48 3% (182 / 377) ,有 92 4%的阳性鱼混合感染 2种以上吸虫囊蚴。保虫宿主狗、猫感染率 79 2 % (19/ 2 4) ,每只阳性动物均有 2种以上吸虫混合感染。 15个引物在福建棘隙吸虫广东株与福建株两者共获DNA片段 185个 ,共享度 (F) =0 984,遗传距离 (D) =0 0 16。结论　当地为人兽共患的多种鱼源性吸虫混合感染区。形态学观察和分子生物学检测结果相印证 ,福建棘隙吸虫广东株与福建棘隙吸虫福建株为同一虫种。Aim To seek the possible existence of mixed infections of Echinochasmus fujianensis and other fish-borne tremtodes in Pinyuan county,Guangdong.Methods Metacercariae of trematodes were detected from gills,muscles and some other tissues of freshwater fish and examintd under microscopy Sedimentation pocedures were used to observe parasite ova in stool Adult worms were obtained from definitive animal hosts upon dissection Experimental animal infection were performed from metacercariae of E fujianensis strains in Fujian and Guangdong,and it's DNA analysis Random amplified Polymorphic DNA(RAPD).Results Six species of trematodes were found,including Clonorchis sinensis,Metorchis orientalis,E fujanensis, E japonicus,E perfoliatus and Haplorchis pumilio Eleven species of freshwater fish comprising Pseudorasbora parve were identified as the second intermediate hosts,with an average positive rate of 48 33%(182/377) The overall mixed infection animal were contracted with 2 or more species Dogs and cats were detected to be reservoir hosts,the total infection rate being 79 2%(19/24).92 4% of infecded fish were contracted with 2 or 6 speies of the metacercariae of trematodes 185 DNA fragments were obtained by 15 primers,F=0 894 and D=0 016 between E fujianensis Guandong and Fujian strain Conclusion There are six species of fish-borne trematodes which may cause infections in human and animal in the regions E fujianensis Guangdong stain and Fujian strain are the same species福建省科技计划基金!资助项目 (No 98-Z - 1 56);; 福建省“百千万人才”人选培养资

水热法合成β沸石结晶度的研究

以四乙基氢氧化铵为模板剂 ,采用水热法合成 β沸石。考察水热法合成 β沸石时体系中有机模板剂用量、水硅比、钠硅比及晶化时间等对合成的 β沸石相对结晶度的作用。样品的相对结晶度用X射线衍射仪分析。得出各种因素对合成 β沸石相对结晶度的影

水热法合成β沸石结晶度的研究

以四乙基氢氧化铵为模板剂，采用水热法合成β沸石，考察水热法合成β沸石时体系中有机模板剂用量，水硅比，钠硅比及晶化时间等对合成的β沸石相对晶度的作用，样品的相对结晶度用X射线衍射仪分析，得出各种因素对合成β沸石相对结晶度的影响

水热法合成β沸石结晶度的研究

以四乙基氢氧化铵为模板剂，采用水热法合成β沸石，考察水热法合成β沸石时体系中有机模板剂用量，水硅比，钠硅比及晶化时间等对合成的β沸石相对晶度的作用，样品的相对结晶度用X射线衍射仪分析，得出各种因素对合成β沸石相对结晶度的影响

偏心底吹氩钢包三维流场的特性

模拟研究了偏心底吹氩钢包内钢液流场,并分析了该流场的主要特点。结果表明在偏心底吹氩钢包中,钢液形成一个三维流动体系,纵向形成了以沿气液均相区、钢液表面、包壁、包底为轨迹的大循环流场,横向形成了以喷嘴所在直径为轴的一个对称循环流场。在吹气量一定的情况下,底吹喷嘴位置对流场有较大影响

氧枪喷头射流的数值模拟

采用可实现k-ε模型对4孔氧枪的一个喷孔进行了二维流场模拟。以O2、N2和CO2射流为例,通过模拟计算确定在实际炼钢转炉环境下3种射流的流场分布,并对比分析了3种不同气源的射流特性,为进一步优化氧枪参数提供了依据;模拟计算也得出了激波和膨胀波的产生形式。结果表明,O2和N2的射流流场分布几乎不存在差别,而CO2射流流场核心区长度比前两射流要短,因此要达到同样的射流流场效果,要提高CO2射流的入口压力;在实际的操作环境下,很难做到完全满足喷孔的设计条件,产生了微弱的斜激波