Effect of Formalin Treatment on the Monogenean Pseudorhabdosynochus epinepheli (Monogenea) and the Fish Epinephelus coioides

20 0 0年 4月研究了斜带石斑 Epinepheluscoioides寄生拟合片盘虫Pseudorhabdosynochusepinepheli的防治方法。海水福尔马林对拟合盘虫的作用表现为 :2 5min处理的半致死浓度为 2 5 0× 10 - 6 ,5 0min处理的半致死浓度为 5 0× 10 - 6 。淡水福尔马林的效果为 :3min的半致死浓度为 83× 10 - 6 ,纯淡水处理的半致死时间为 2 1min。海水福尔马林对斜带石斑的毒性表现为 :30min和 4 5min的半致死浓度分别为 94 0× 10 - 6 和 6 4 5× 10 - 6 。淡水福尔马林对斜带石斑的毒性表现为 :5min和 10min的半致死浓度分别为 130 0× 10 - 6 和 5 0 0× 10 - 6 。福尔马林处理海水中的斜带石斑半致死浓度介于 6 0 0× 10 - 6 ～ 10 0 0× 10 - 6 ,淡水处理对斜带石斑半致死浓度介于 95× 10 - 6 ～ 115×10 - 6 。淡水中斜带石斑的半麻醉和半致死时间分别为 95min和 115min。以上结果表明 :海水和淡水福尔马林对石斑拟合片盘虫的致死浓度 ,处于斜带石斑的安全范围之内。Prophylactic methods against Pseudorhabdosynochus epinepheli (Monogenea) infection on the fish Epinephelus coioides were investigated in April 2000.The effect of formalin in seawater on P epinepheli was that the semi_lethal concentration is 250×10 -6 for 25 min,and 50×10 -6 for 50 min.The effect of formalin in freshwater on P epinepheli is reported as:the semi_lethal concentration was 83×10 -6 for 3 min.The semi_lethal time for freshwater alone was 21 min.The toxicity of formalin in seawater to E coioides was assessed:the semi_anaesthetic concentration was 940×10 -6 in 30 min and 645×10 -6 in 45 min.The toxicity of formalin in freshwater to E coioides was as follows:the semi_anaesthetic concentration was 1 300×10 -6 in 5 min and 500×10 -6 in 10 min.The semi_lethal formalin concentration to E coioides in seawater was between 600×10 -6 and 1 000×10 -6 ,and in freshwater was between 250×10 -6 and 500×10 -6 .The semi_anaesthetic and semi_lethal time of E coioides in freshwater were 95 min and 115 min respectively.These results demonstrated that the lethal formalin concentrations for P epinepheli in both seawater and freshwater fell in a safe range for E.coioides.国家 8 6 3资助项目 (2 0 0 1AA6 2 10 10 ) ;; 广东省自然科学基金资助项目 (0 2 16 81

On Relationship between Public Financeand Government Accounting

公共财政和政府会计因公共受托责任而联系起来。公共财政的职能本质上是政府要承担的公共责任,而政府会计就是对公共受托责任完成过程及其结果的认定、计量和报告。完善的政府会计理论与实务、健全的公共财政职能都是良好的公共治理的关键因素。政府会计系统为公共财政管理提供的基础技术,政府会计提供的信息也为公共财政管理目标的实现服务。在我国,建立与社会主义市场经济体制相适应的公共财政体制必然要求改革现有政府会计体系,这是公共财政职能不断发展变化从而公共受托责任发展变化的要求,是建立良好的公共治理结构的要求,是完善公共财政管理的要求。Public accountability is a bridge between public finance and government accounting. Assuming public accountability is the function of public finance, and government accounting is the assertion, measurement and communication of the process of the discharge of public accountability. Reasonable theories and practices of government accounting and public finance are both key elements of sound public governance structure. Government accounting systems also provide basic skills for public financial management. The information from government accounting also serves to the realization of public financial management's objectives. In our country, it is necessary to reform the existing government accounting system to construct a public finance system seasoned with market economy, which is required by changes of public finance function and in turn changes of public accountability, also by building up sound public governance structure and perfecting public financial management

高等学校实行政府采购制度若干问题的探讨

政府采购制度是西方发达国家的普遍做法。我国自20世纪90年代中期开始政府采购的试点,财政部也于1999年发布了《政府采购管理暂行办法》,为政府采购制度在我国的立法和全面推行做了大量的探索和前期准备工作。2002年6月我国颁布实施《政府采购法》,从而将政府采购制度全面系统地纳入了法制的轨道。作为以财政拨款为主渠道的高等学校,按照国家法律法规实行政府采购并纳入政府采购体系是必然的。本文将对高等学校实行政府采购制度的几个问题作些探讨

Determination of Trace Lead in High Salt-ContainingSamples by Solid Phase Extraction Column(SPE)Hyphenated with Inductively Coupled PlasmaMass Spectrometer(ICP-MS)

建立了微柱固相萃取 -电感耦合等离子体质谱联用系统 .对萃取体系的 p H、洗脱液酸度及流速进行了优化选择 .在最佳的分离条件下 Pb的检测限 (3σ,n=6)为 0 .0 3ng/ m L,测定海水的铅的RSD为 2 .6% .该系统成功地应用于实际样品和标准参考物的在线分离富集和测定 .标准物质的分析结果与参考值能很好地吻合A Solid Phase Extraction Column(SPE) Inductively Coupled Plasma Mass Spectromet er(ICP MS) hyphenation system was established. The parameters of extraction sys tem such as pH condition, the concentration of nitric acid in eluant and the flo w rate of eluant were optimized. Under optimized conditions, the determination l imit of lead (3σ, n =6) is 0.03 ng/mL.The RSD of measurements for four i ndividual seawaters was 2.6%. The accuracy of the method was assessed by the ana lysis of a certified reference material. Lead recovery from CRM and spiked seawa ter were in the range of 98% and 99.6%.国家自然科学基金重点资助项目 (2 9735 16

Study on Accuracy and Precision of Isotope Ratios Measured by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

通过对电感耦合等离子体质谱 (ICPMS)的工作条件和参数进行了最优化 ,有效降低由于进样系统、ICPMS瞬间不稳定和电子元件噪音等因素造成的测量同位素比值波动的影响。通过对质谱死时间、系统漂移和质量歧视效应的校正 ,可获得准确度高的同位素比值。茶叶、人发和灌木枝叶标准样品中铅的含量分别为 4.44、9.0 6和 46.80 ng/g,标准偏差 (s)分别为± 0 .0 7、± 0 .2 4和± 1 .2 4,与其确认值一致。The instrumental fluctuation from sampling system and plasma that induce the low precision can be avoided by optimizing the operating parameters. For the accuracy results, the ratios acquired should be corrected with the dead time and internal standard mass bias. The lead concentrations of standard reference materials including Tea GBW07605, Bush leaves GBW07603 and Human hair GBW 07601 are 4.44, 9 06 and 46.80 ng·g -1 , respectively. The standard diviations ( s ) of these measuring values are ±0.07, ±0 24 and ±1.24, respectively.福建省中药标准化项目 (2 0 0 0 F0 0 1) ;; 建泽泻 GAP重大项目 (2 0 0 2 Y0 2 4 ) ;; 科技部中药重中之重项目 (99- 92 9- 0 2 - 13

Application of Isotope Dilution-Inductively Coupled Plasma Mass Spectrometry on Trace Element Analysis

介绍了同位素稀释法的原理 ,对同位素稀释法的浓度计算公式进行了推导。着重论述了同位素稀释法电感耦合等离子体质谱分析过程中影响同位素比值测定结果准确度和精确度的主要因素及其解决办法。综述了同位素稀释法电感耦合等离子体质谱近几年来在材料、生物以及环境样品分析中的应用。The principle and calculated formula of isotope dilution method is introduced. Some important parameters affecting the precision and accuracy of isotope ratio measurements in isotope dilution-inductively coupled plasma mass spectrometry(ID-ICP-MS) are discussed and the way to deal with those parameters is presented. The application of ID-ICP-MS on the analysis of reference materials, biological and environmental samples over the last years are reviewed. Sixty references are cited.国家自然科学基金重点项目! (29735160

基于加载传动误差的驱动桥NVH分析及性能优化

为提升汽车驱动桥NVH性能，基于实际工况，从驱动桥主减齿轮传动误差着手，建立了一种驱动桥NVH分析及性能优化方法。基于MASTA软件建立驱动桥精确模型，依据实际工况载荷计算出齿轮啮合错位量；基于实际工况对驱动桥主减齿轮进行TCA及LTCA分析，得到加载接触区及传动误差的变化规律。在此基础上，基于MASTA软件研究了驱动桥NVH仿真分析方法，得到实际工况下的驱动桥噪声曲线。建立了加载传动误差与驱动桥噪声曲线之间的影响关系，通过控制传动误差对驱动桥NVH性能进行了优化。研究为驱动桥减振降噪以及主减齿轮的修形优化提供了理论参考

哈萨克斯坦阿克斗卡特大型斑岩铜矿床成矿时代与剥露历史研究/Metallogenic Age of the Super-Large Aktogai Porphyry Copper Deposit,Kazakhstan, and Its Exhumation History[J]

哈萨克斯坦阿克斗卡特大型斑岩型铜矿床产在中亚成矿域巴尔喀什成矿带阿克斗卡矿田.本文根据花岗岩类岩石的锆石U-Pb、40Ar/39 Ar和裂变径迹(FT)热年代学研究,结合前人研究成果,给出了阿克斗卡斑岩铜矿床从深成岩浆活动、成矿作用、区域冷却到剥露作用的全过程.阿克斗卡矿床及附近花岗岩类锆石SHRIMPU-Pb定年结果,给出科尔达尔岩体早期英云闪长岩的结晶年龄为335.7士1.3 Ma;主成矿期的含矿二长花岗斑岩结晶年龄为327.5±1.9 Ma,反映了阿克斗卡矿床斑岩型铜成矿作用的年龄.花岗岩类角闪石、黑云母、钾长石40Ar/39Ar热年代学分别给出矿物冷却年龄为310.6 Ma、271.5 Ma和274.9 Ma,进一步限定了深成斑岩型铜成矿作用的时代和区域冷却的历史.磷灰石FT测年数据揭示,受区域构造作用的影响,阿克斗卡铜矿田在晚白垩世(91～68.0 Ma)发生地块的差异隆升和剥露作用