7种海洋微藻对UV-B辐射的敏感性差异分析

在实验室条件下研究了UV B辐射对 7种海洋微藻生长的影响 .结果表明 :7种微藻的相对增长率随着UV B辐射剂量的增强呈明显的下降趋势 (P <0 0 5 ) .实验微藻对UV B辐射的敏感性符合绿藻 >硅藻 >金藻的分类学规律 ,其中金藻 870 1是最敏感的一种 .叶绿素a和类胡萝卜素的 48h半数有效抑制浓度EC50 远远大于相对增长率的EC50 .分光光度法测定微藻在UV波段的吸收峰集中在UV C波段 .在UV B波段 ,每 10 4 个细胞的最大吸收度的顺序为 :绿藻 >硅藻 >金藻 .微藻对UV B辐射的敏感性可能与其在该波段的吸收度之间存在一致性关系     

载带苯并[a]芘的纳米碳／二氧化硅颗粒引起大鼠氧化应激作用的研究

通过人工制备载带B[a]P的纳米碳(C)和纳米二氧化硅(SiO2)颗粒,采用气管滴注染毒方式,以7.5mg·kg-1(以体重计)的染毒剂量急性染毒大鼠,观察染毒24小时后载带B[a]P的纳米C/SiO2颗粒对机体产生氧化应激损伤的联合毒性效应.结果表明,在急性染毒后大鼠外周血中反映机体脂质过氧化损伤程度指标的丙二醛(MDA)含量表现为染毒组较对照组显著增加(p<0.05),表明纳米颗粒诱发机体发生了氧化应激反应.在急性染毒后各组大鼠肺泡灌洗液中谷胱苷肽过氧化物酶(GSH-PX)和超氧化物岐化酶(T-SOD)活力与对照组相比显著增加(p<0.05)(载带B[a]P的纳米SiO2组除外);载带B[a]P的纳米SiO2组肺泡灌洗液中GSH-PX活力与对照组相比无显著差异,而与单纯纳米SiO2组和B[a]P组比较显著降低,推测与抗氧化酶的一过性增高有关;载带B[a]P的纳米C组肺泡灌洗液T-SOD活力与其单纯纳米C组和单纯B[a]P组比较显著增加(p<0.05),由此表明载带B[a]P的复合纳米C/SiO2颗粒在致机体氧化损伤效应方面二者存在一定的协同作用.     

扬子石化公司环保信息网的网络结构介绍

介绍了环保信息网的网络结构和应用系统结构。环保信息网络采用以太交换网的总线拓朴结构，系统操作平台为Windows NT4.0，开发工具为Delphi4.0，数据库存储和管理采用SQL server，整个网络通过B/S、C/S和RAS三种方式来共同实现环境统计和监测资料的收集、处理、加工和传输的计算机化和网络化。     

Preparation of TiO2/Ti mesh photoelectrode and properties

An innovative photoelectrode,TiO2/Ti mesh electrode,was prepared by anodisation.In anodisation,0.5 mol/L H2SO4 was used as electrolytic solution,the current had been constantly 1A from the beginning of the oxidation until reaching a designed voltage.Results showed that the photocatalytic activity of electrode was better when the designed voltage was 160 V.The morphology and the crystalline texture of the TiO2 film on mesh electrode were examined by scanning electronic microseopy and Raman spectruscopy respectively.The examination results indicated that the structure and properties of the film depended on anodisation rate,and the anatase was the dominant component under the eontrolled experimental conditions.Degradation of Rhodamine B in photocatalytic (PC)and photoelectrocatalytic(PEC) reaction was investigated.     

综合地震台网络办公自动化系统

计算机与网络技术高速发展的今天，办公自动化（OA）系统现已在各行各业得到广泛应用。目前市场上的办公软件产品很多且功能强大，但由于各个行业本身的特殊性，这些系统很不适合应用于地震部门。本文研究了综合地震台如何搭建适合自己的经济、简单、实用的OA系统，为国内其他地震台实现OA作一些建设性的理论及技术参考。     

Apolipoproteins in human fetal blood and amniotic fluid in mid-trimester pregnancy

To examine the potential for prenatal diagnosis of genetic lipoprotein metabolic defects (e.g. abetalipoproteinemia, Tangier disease) we determined the normal concentrations of apolipoproteins (apo) A-I, A-II, B, and E in mid-trimester amniotic fluid and fetal plasma. The concentrations of apo A-I and apo A-II in amniotic fluid were 1−2 per cent of the respective levels in the mother's plasma, whereas apo B and apo E were undetectable in amniotic fluid. In contrast to amniotic fluid, all four apolipoproteins were detectable in fetal plasma, and the levels of apo A-I, apo B and apo E were in the range observed in the mothers: 160·2 ± 103·1, 59·8 ± 35·7 and 5·7 ± 3·5 mg/dl respectively (mean ± SD, n=13). The fetal plasma level of apo A-II (28·3 ± 12·4 mg/dl) was two-thirds that observed in the mother's plasma. The normal levels of these apolipoproteins in fetal plasma are well above the sensitivity of the methods, and their quantification requires only 10−20 μl of fetal plasma. Determination of apolipoproteins in fetal blood obtained by fetoscopy thus may provide a method for the prenatal diagnosis of congenital apolipoprotein deficiences.     

曲霉菌丝球HX对偶氮染料的吸附脱色

采用富积和驯化方法选育出的曲霉菌丝球HX对不同种类染料表现出高效吸附性能，可在12h内完全吸附200mg／L的直接染料、分散染料及活性黄X-R的颜色，并且研究了碳源质量浓度、氮源质量浓度、盐度、培养条件及优化条件组合对菌丝球HX吸附活性艳红X-3B的影响，结果表明：随碳源质量浓度的增加，吸附率相应增加，质量浓度为10．0g／L以上时，72h及以上的吸附率大于92．3％；氮源质量浓度高于0．75g／L时对吸附率影响不大；随盐度增加，染料吸附率有所下降．在温度为25～35℃、染料培养基pH为5．0～7．0、供氧充足的条件下吸附率较高．在所筛选的最佳吸附条件下，菌丝球HX对活性艳红X-3B表现出了更好的吸附效果．图6表3参9     

东海大型底栖生物次级生产力研究

根据2000年秋季和2001年春季在东海23个大面站进行的大型底栖生物定量采集样品资料，利用Brey’s（1990）的经验公式对调查海区进行了大型底栖生物栖息密度、生物量、次级生产力和P／B值的研究和计算．结果表明，该海域大型底栖生物平均栖息密度在秋季为87m^-2，远低于春季的138m^-2，而平均生物量以去灰干重计，秋季为1．40gm^-2，高于春季的1．25gm^-2；年平均次级生产力以去灰干重计，为1．62gm^-2a^-1，远低于渤海和南黄海．研究表明，大型底栖生物生物量和次级生产力受水温和水深的影响，平均P／B值在研究海域为1．41a^-1，高于渤海和黄海，表明在东海大型底栖生物中个体小而代谢快、生活史短的种在大型底栖生物中占的比重要大于渤海和南黄海，P／B值随水温升高而升高，图2表2参28     

新生MnO2对直接染料废水的脱色作用

以化学法合成的新生MnO2作吸附剂，对直接桃红12B（Direct red 12B)，直接大红4B（Direct reb 4B)，直接耐晒蓝B2RL（Direct Fast blue B2RL)染料废水进行脱色研究，探讨了影响吸附的因素，结果表明：新生MnO2对三种染料的吸附符合Langmuir吸附等温式，吸附速率大，在适宜条件下对直接桃红，直接大红，直接耐晒蓝的脱色率分别为95．5％，96．2％和98．9％。     

Temporal accumulation of phenylpropanoids in male fruit flies, <Emphasis Type="Italic">Bactrocera dorsalis</Emphasis> and <Emphasis Type="Italic">B. carambolae</Emphasis> (Diptera: Tephritidae) following methyl eugenol consumption

Summary. Males of dacine tephritids, Bactrocera carambolae and B. dorsalis are strongly attracted to, and compulsively feed on methyl eugenol (ME), a potent attractant for many Bactrocera species. While ME was shown to be biotransformed into phenylpropanoids, 2-allyl-4,5-dimethoxyphenol and (E)-coniferyl alcohol, and temporarily stored in the rectal gland of male B. dorsalis prior to release during courtship at dusk, B. carambolae male produces only the latter compound along with its de novo synthesized pheromone components. Both species were also shown to have different age-related response, sensitivity and consumption levels of ME. Here, we monitored and compared temporal changes in the accumulation profiles of these phenylpropanoids by the two sibling species, with male rectal glands being individually excised at different time intervals from 15 minutes to 20 days after initial ME feeding and analysed quantitatively. Results are discussed in light of plant-fruit fly co-evolution relationship.