38 research outputs found

    似血矛线虫体外发育过程的观察

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    描述了似血矛线虫(HAEMOnCHuSSIMIlIS)的体外发育过程。在22-32℃下,从产生卵发育至第一期、第二期、第三期幼虫的时间分别是16H、31H、25-35d

    Description on Mononchida from Southern District,Fujian

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    单齿类线虫是植物寄生线虫的天敌,利用其生防植物线虫病具有很大潜力.报道福建省南部地区捕食性线虫4属7种,其中国内新记录4种.每种经描述和详细绘图A survey of predacious nematodes (Mononchida)was carried out in southern district, Fujian.A total of 7 species of nematodes,Mononchida are described and illustrated in detail.They are Mononchus truncatus,Mylonchulus hawaiiensis,Mylonchulus lacustris,Iotonchus parabasidontus,Miconchus pararapax,Mononchus aquaticus and Mylonchulus minor,and the latter four species are new records in China.福建省自然科学基

    神经导航系统在颅内病变显微手术中的应用

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    应用神经导航系统进行颅内病变显微手术50例.本组颅内病变及其周围解剖结构定位准确,平均注册误差 2.4±0.4 mm.术后近期复查颅脑MR证实肿瘤全切率92%,手术并发症10%,手术时间和住院日较常规开颅手术缩短.结果表明:1)神经导航系统术前计划定位精确;2)实时导航下颅内病变显微手术,有助于达到微侵袭效果和提高肿瘤全切除率

    脱氧胆酸改性普鲁兰多糖纳米粒子制备与表征

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    通过酯化反应将脱氧胆酸偶联于普鲁兰多糖骨架形成具有两亲性的普鲁兰多糖衍生物(DP),采用纳米沉淀法制备纳米粒子(DPNs),考察制备条件对纳米粒子性质影响,为进一步将其作为药物载体的研究提供基础。衍生物DP结构通过FT-IR和1 H NMR表征,DPNs经透射电镜、动态光散射仪和zeta电位仪表征检测。获得不同取代度脱氧胆酸改性普鲁兰多糖衍生物,制备得到的纳米粒子呈球形,表面光滑规整,平均粒径100~300nm,zeta电位在-20mV左右。脱氧胆酸改性普鲁兰多糖衍生物通过纳米沉淀法能制备出纳米粒子,颗粒性质受制备条件影响

    福建九牧耕牛感染吸虫情况的粪检调查

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    福建省北部山区是几类重要吸虫的流行区。1993年5~6月间,用重力沉淀法对闽北九牧乡的1171头耕牛进行粪检调查,结果表明:水牛的胰吸虫感染率为0,前后盘吸虫感染率为96.05%,肝片吸虫感染率为38.16%;黄牛的胰吸虫感染率为53.19%,前后盘吸虫感染率为93.62%,肝片吸虫感染率为34.04%。另外,对中间宿主的感染情况也进行了剖检。所得结果对认识吸虫在自然界流行的保持机制,进行防治有重要意义

    神经导航在颅内胶质瘤显微手术的应用

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    目的 评价神经导航在颅内胶质瘤显微手术的应用价值。方法 应用神经导航系统进行颅内胶质瘤显微手术 30例。结果 用神经导航系统进行胶质瘤及其周围解剖结构定位准确 ,平均注册误差 (2 .5± 0 .4 )mm。术后近期复查CT或MR证实胶质瘤全切率 83.3% ,手术时间和住院日较常规开颅手术缩短。结论  (1)神经导航定位精确 ,有助于手术计划的精确实施。 (2 )实时导航颅内胶质瘤显微手术 ,有助于达到微侵袭效果和提高胶质瘤全切除率。 (3)摸索一套减少靶点漂移的经验

    福建省家禽嗜眼吸虫的研究

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    嗜眼属(Philophthalmus Looss,1899)吸虫主要寄生在鸟类的结膜囊(conjunctival sac)瞬膜(nictitating membrane)中,由于虫体机械刺激及分泌物毒素的影响,患禽眼黏膜充血、组织液渗出、角膜与瞬膜晦暗充血,有的化脓溃疡,眼睑肿大或紧闭。鸟类尤其幼雏因此眼疾而不能寻食、消瘦,有的两腿瘫痪,严重的致死。除鸟类外,兔子、小白鼠及小型哺乳动物亦可受感染(Alicata and Ching,1960;Cheng and Thakur,1967)。在南斯拉夫

    Studies on Gnathostomes in Fujian.I.A Study on the Epidemiology of Gnathostoma hispidum in Minnan District

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    本文报告闽南地区猪刚刺颚口线虫病流行病学。终宿主猪检查790头,感染率为4.7%,感染强度1~16条虫。第2中间宿主鱼类检查12种,阳性3种,即黄鳝MOnOPTEruSAlbuS,乌鳢OPHIOCEPHAluSArguS和胡子鲶ClArIASbATrACHuS,感染率依次为30%,10%和4.2%,胡子鲶是国内外宿主新纪录。两栖类检查2种,均阴性。转续宿主蛇类检查5种,阳性4种,它们是银环蛇bungAruSMulTICInCTuS、水泡蛇EnHydrISPluMbEA、渔游蛇nATrISPISCATOr和中国水蛇E·CHInEnSIS感染率分别为71.4%,14.3%,12.5%和12.5%,这4种转续宿主均为国内外首次报告。调查结果显示,闽南地区是刚刺颚口线虫病散发性流行区。鳝鱼和银环蛇是传播本病的重要媒介。The Present study is concerned with a survey of the epidemiology of Gnathostoma hispidum in Minnan district.A total of 790 pig were examined and inFective rate of G.hispidum in pig was 4.7%.The intensity was From 1 to 16 worms, the second intermediate host, 12 species of Fishes were examined and 3 species of them, namely Monopterus albus, Ophiocephalus argus, and Carias batrachus were Found to be naturally inFected with the advanced 3rd-stage larvae of G.hispidum, whereas the last species is recorded For the First time as the host in the world.Their inFective rates of the larvae in order were 30%,10%and4.2%,respectively.2 Frogs species were examined and the results were all negative For the larva.5 paratenic hosts species were examined and 4 species, Bungarus multicintus, Enhydris plumbea and Natrix piscator, were Found be naturally inFected with advanced 3rd-stage larvae of G.hispidum.Their inFective rates were 71.4%,14.3%,12.5%and12.5% respectively.These 4 snakes species are recorded For the First time as the paratenic host From the world.Our investigations results Found that in Minnan district, Monopterus albus and Bungarus multicinctus may play a signiFicant role in spreading G.hispidum disease and above area must be regarded as a sporadic epidemic area of G.hispidum.福建省自然科学基

    MORPHOLOGY of THE GENITAL CONE IN FIVE NEMATODES

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    在光镜和扫描电镜下对似血矛线虫(HAEMOnCHuSSIMIlIS)、捻转血矛线虫(HAEMOnCHuSCOnTOrTuS)、辐射食道口线虫(OESOPHAgOSTOMuMrAdIATuM)、粗纹食道口线虫(OESOPHAgOSTOMuMASPEruM)、哥伦比亚食道口线虫(OESOPHAgOSTOMuMCOluMbIAnuM)的生殖锥进行观察比较。结果表明:似血矛线虫的生殖锥的生殖附器(gEnITAlAPPEndAgES)只有一对乳突,而捻转血矛线虫的生殖附器有2对乳突。辐射食道口线虫生殖锥背唇上的乳突似苹果、粗纹食道口线虫背唇上的乳突呈椭圆形,哥伦比亚食道口线虫背唇乳突上还有一小突起The genital cone of H.similis,H.contortus,O.radiatum,O.asperum and O.columbianum were observed under LM and SEM.The results showed:The genital appendages of H.similis has a pair of papillaes whearas H.contortus has two pairs.O.radiatum,O.asperum and O.columbianum appear diFFerent in the papillaes of the dorsal lips.The papillaes of the dorsal lip of O.radiatum are of appleshaped and those of O.asperum are elliptical.There is a little projection on the papillaes of the dorsal lips of O.columbianum

    Synthesis of YAG:Tb~(3+) Phosphors by Polymer Gel Method at Low Temperature

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    陈都; 肖清泉; 陈朝; 曾人杰; 【作者英文名】 CHEN Du~1 XIAO Qing-quan~1 CHEN Chao~2 ZENG Ren-jie~1 (1.College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005; China; 2.College of Physics and Mechanical & Electrical Engineering; China); 【作者单位】 厦门大学 化学化工学院材料科学与工程系; 厦门大学物理与机电工程学院 物理系; 厦门大学 化学化工学院材料科学与工程系 福建 厦门; 福建 厦门; 【文献出处】 发光学报, Chinese Journal of Luminescence, 编辑部邮箱 2007年 05期[中文摘要]以金属硝酸盐为原料,丙烯酰胺为聚合单体以及N,N-亚甲基双丙烯桥酰胺为胶联剂,采用高分子网络凝胶法在低温下合成精细粒度Y_3Al_5O_(12):Tb~(3+)(YAG:Tb~(3+))荧光粉。分别用热重-差热分析(TG-DTA)、X射线衍射(XRD)、扫描电子显微镜(SEM),以及激发和发射光谱测量对样品进行了表征,考察了烧结温度对样品结晶程度、颗粒大小的影响,以及样品发光性能与烧结温度和Tb~(3+)浓度的关系。结果表明:YAG晶相形成温度为850℃;粉体颗粒大小均匀,随着烧结温度的升高,颗粒粒径增大,结晶程度提高;观察到Tb~(3+)中4f-5d的吸收带以及~5D_4-~7F_j(j=6,5,4,3)的特征发射带,最强吸收与最强发射分别发生在272,541.8 nm,与量子理论(E=1.24/λ)的计算结果相吻合,其发光强度随烧结温度的升高而增强;观察到了Tb~(3+)在Y_3Al_5O_(12)中的浓度猝灭现象。 [英文摘要]Using acrylamide (CH_2=CHCONH_2) to form long chains of polyacrylamide and a cross-linker N′,N′-methylenebisacrylamide (CH_2=CHCONHCH_2NHCOCH=CH_2) to achieve tangled network,hydro- gen peroxide (H_2O_2) as initiator and N,N,N′,N′-tetramethylethylenediamide [(CH_3)_2 NCH_2 CH_2 N (CH_3)_2] as activator,we have successfully prepared the precursor from nitrates (aluminum nitrate,yttrium nitrate,and terbium nitrate),the precursor was subsequently heat-treated from 700℃to 1 400℃for 4 h to form terbium- doped yt..
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