Polymorphism,taxonomy and host plant associations in Alebra leafhoppers (Homoptera: Cicadellidae: Typhlocybinae)

The taxonomy of a complex of morphologically similar Alebra species is clarified, and the number of adult colour pattern morphs of each in Britain, and their host plant associations, established. Morphological characters are figured for the identification of the four species now recognized, including two that are associated with different species of deciduous oaks and which were previously regarded as colour pattern morphs of A. albostriella. Three nymphal colour pattern morphs are described within the A. albostriella sibling species, two of which are shared, thus supplying further evidence for their close relationship. A key is given for the identification of the species and adult morphs of Alebra in Britain.     

不同寄主红花寄生叶提取物抗氧化能力的研究

采用FRAP法和TEAC法测定了6种寄主植物(女贞、石榴、荷花玉兰、长梗柳、桑、夹竹桃)来源的红花寄生叶提取物抗氧化能力,并采用RP-HPLC检测了提取物中槲皮素和山奈酚质量分数.结果表明:红花寄生叶提取物具有较强的抗氧化能力,且活性强弱受不同提取剂和寄主植物的影响显著(p＜0.05).在3种提取剂中,以体积分数为80...     

寄生植物和寄主植物间的物质分配

以寄生植物肉苁蓉和寄主植物梭梭为对象, 研究了寄生植物和寄主植物间的物质分配.结果显示, 肉苁蓉体内累积大量的可溶性碳水化合物, 其中可溶性总糖、淀粉以及总可溶性碳水化合物总量分别达到了5.56, 2.73, 8.29 g/株, 分别占梭梭肉苁蓉复合体的51.01%, 60.13%,53.73%; 肉苁蓉对K, P, Zn, Cu 的累积较多, 总量分别达到了348.15, 18.94, 0.24, 0.14 mg/株, 分别占复合体的18.46%, 16.36%, 7.27%, 5.67%. 本研究结果为寄生植物和寄主植物间的物质分配调节提供了初步的理论依据.     

双掺杂二氧化钛的制备及其在降解染料废水中的应用

作者研究了溶胶-凝胶法制备的Sm、Ag共掺杂的TiO2,并用XRD、TEM等技术表征了催化剂的形貌、结构及吸光性能,样品的表征与光催化活性测试结果表明,Sm离子的引入使催化剂增加了储氧能力及热稳定性和选择性,Ag离子的掺杂显示了电荷分离抑制了光催化的促进作用和对氧气还原反应的催化作用.两种离子的引入使TiO2样品的拓宽了光响应范围,使可见光吸收强度增大.     

Immature stages of Chinavia musiva (Berg, 1878): a unique pattern in the morphology of Chinavia Orian, 1965 (Hemiptera,Pentatomidae)1

Specimens of Chinavia musiva were collected in Parque Estadual do Espinilho (Barra do Quaraí County, RS, Brazil). Insects were reared under controlled conditions (24±1°C; RH 70±10%; 12h L:12h D), and fed on green beans (Phaseolus vulgaris L.). Eggs of C. musiva differ from the pattern observed in other species of the genus due to chorion colour and surface, and aero‐micropylar processes, number and shape. Exclusive features of the species in the nymphal stage are head and thorax dull; variegated pattern of abdomen, and openings of the scent glands in conspicuous tubercles. Developmental time was, on average, 52 days; females laid more frequently egg masses with 14 or 42 eggs. Females collected from the field as nymphs exhibited higher reproductive performance than females reared on green beans as nymphs and adults, suggesting that wild hosts could be essential for the species life cycle.     

锌掺杂二氧化钛对含酚废水的降解作用的研究

以钛酸四丁酯为主要原料,氯化锌溶液为掺杂剂,采用超声分散法制备了含锌的二氧化钛光催化剂.并采用X射线衍射(XRD),透射电镜(TEM)对产品进行了表征.同时研究了不同影响因素对苯酚去除率的影响.结果表明,焙烧温度为500℃,锌掺杂量r(Zn∶Ti)=0.01,催化剂的最佳投加量为2 g/L光催化性最好.     

二球悬铃木根结线虫的鉴定

青岛市二球悬铃木受根结线虫严重为害。该线虫会阴花纹近圆形,条纹密致,近侧线处条纹呈“Z”字形,甚至卷曲;口针长17μm,基部球与针杆分离,呈球形;只能侵染烟草、番茄和西瓜,在辣椒上形成根结甚少,不能侵害棉花和花生。这些特征与Hedwig Hirschmann(1982)描述的美国梧桐上的根结线虫一致。鉴定青岛二球悬铃木根结线虫为Meloidogyne platani Hirschmann。该种在我国尚属首次报道。     

C1000H可编程控制器上位机通讯的开发与研究

可编程控制器联网系统中的上位通讯功能，是实现控制系统上位计算机集中监视、集中控制和集中管理的关键．本文以ＳＹＳＭＡＣ－Ｃ系列中的Ｃ１０００Ｈ可编程控制器上位通讯为例，探讨了有关软件硬件的原理及组成．在通讯协议及网络硬件的基础上，作者通过上位机的可编程异步通讯接口８２５０开发了以查询式和中断式两种方式分别实现的Ｃ１０００Ｈ上位通讯软件．经过系统的调试与运行，证明方法正确、方案可行，可以方便地进一步实现各种上位操作功能．     

刚刺颚口线虫流行病学调查及其幼虫对灵长类的易感性

本文报告了刚刺颚口线虫 Gnathostoma hispidum 第一、二中间宿主和转续宿主共 38种。首次证明狲猴 Macaca mulatta可充当本虫的第二中间宿主和转续宿主。用刚刺颚?线虫晚第三期幼虫经皮肤穿刺感染小白鼠和家猫均获得阳性。5种哺乳动物和4种鸟类(其中家禽2种)用同上幼虫人工感染亦获成功。流行学调查和动物实验表明本虫和棘颚口线虫G.spinigerum 的生物学和流行学特性十分相似,同样能感染人体,是人兽共患的重要寄生虫。     

掺杂稀土元素对改善氧化铝热稳定性机理的探讨

从阻抑氧化铝的相变、表面化合物的生成和延缓氧化铝的烧结三个方面探讨了氧化铝掺杂镧后改善热稳定性的机理。