乌兰布和沙漠抗逆植物选择试验及利用

乌兰布和地区光，热，水，土资源丰富，在国家开发西北地区的大政策下，适合进行农，林，牧业开发，但是限于本地区干旱，少雨，风沙大的现状，开发要在以改善生态环境为目的的防护林建设的基础上进行，为本地区增选抗性强，生长快，见效快的灌木品种是当务之急，也是长远需要，本试验选取了干旱地区常见的8种沙旱生灌木进行造林实验，选择出最适于该地区生长的灌木品种主造林方式。     

赤桉种源生长适应性,抗逆性及其遗传稳定性研究

对赤桉４批试验林４２个种源４￣８年生幼林的生长适应性，抗逆性及其遗传稳定性进行分析研究结果。     

A comparison of the effects of propofol and etomidate on the induction of anesthesia and on cardiopulmonary parameters in dogs

ObjectiveTo determine the effects of propofol or etomidate on induction quality, arterial blood pressure, blood gases, and recovery quality in normal dogs.Study designRandomized, blinded trial.AnimalsEighteen purpose-bred adult Beagles.MethodsDogs were randomly assigned to receive propofol at 8 mg kg⁻¹ or etomidate at 4 mg kg⁻¹ intravenously (IV) administered to effect. Midazolam was administered at 0.3 mg kg⁻¹ IV as pre-medication at least 1 minute prior to induction. Direct arterial blood pressure, arterial blood gases, and heart rate were obtained at baseline, before induction, after induction, and for every 5 minutes afterwards until the dog began to swallow and the trachea was extubated. The dogs were allowed to breathe room air with the endotracheal tube in place.ResultsThe systolic arterial pressure (SAP) was higher in the etomidate group compared with the propofol group after induction. The SAP and mean arterial pressure (MAP) were higher in the etomidate group compared with the propofol group at 5 minutes. The recovery quality and ataxia score were worse in the etomidate group compared with the propofol group. Time from extubation to sternal recumbency and sternal recumbency to standing was longer in the etomidate group compared with the propofol group. The heart rate, PaCO₂, and HCO₃ were higher in the propofol group compared with the etomidate group after induction. The PaO₂ and SaO₂ were lower in the propofol group compared with the etomidate group after induction. The SAP and MAP were lower in the propofol group at 5 minutes compared with baseline.Conclusion and clinical relevancePropofol caused a decrease in SAP and MAP which was not observed with etomidate. Etomidate caused longer and poorer recoveries than propofol.     

红细胞存储损伤与临床输注不良后果间的关系

输血是流体复苏的重要组成部分,常用于急性大失血、烧伤、贫血以及严重创伤患者,在改善机体组织供氧和凝血功能、挽救生命的过程中起着无法替代的地位和作用。异体存储血液目前仍是输血的主要来源,然而,存储血液对于红细胞(RBCs)来说不是一种自然的存在状态。在低温存储过程中,RBCs在生化和能量代谢、氧化还原代谢、细胞形态等诸多方面经历了相当大的变化,且随着存储时间的延长,变化更加显著,即"存储损伤"。目前,RBCs存储损伤机制已经基本明确,但RBCs存储损伤是否会影响临床输注不良后果,一直是专家争论的焦点,也是输血界研究的热点。     

From in vitro hepatic metabolic studies towards human health risk assessment: Two case studies of diuron and carbosulfan

Risk assessment of environmental pollutants is an absolutely essential tool in the overall process of protecting public health. Risk assessment needs reliable scientific information and one source of information is the characterization of metabolic fate and toxicokinetics of environmental pollutants. The aim of in vitro characterization is to produce relevant information on metabolism and interactions to anticipate and ultimately predict what happens in vivo in humans. Because human data is most appropriate to improve human risk assessment, the best option is to rely upon human-derived in vitro models and obtain quantitative toxicokinetics data from in vitro systems for the comparison between species or individuals. In short, based on our studies of pesticide metabolism and interactions, we have used in vitro metabolism data in human and animal hepatic in vitro models and clearance testing data to calculate chemical-specific adjustment factors, instead of fixed uncertainty factors, to be employed as an alternative and more realistic model for human health risk assessment of pesticides and other environmental pollutants.     

不对称信息下风险投资家与风险企业家之间的委托代理问题研究

风险投资体系以多重激励和不对称信息为特征,风险投资的三方利益主体之间存在着双重委托-代理关系,有效控制代理风险是风险投资高效运作的基本前提。本文基于信息经济学原理,分析了风险投资家与风险企业家之间代理风险的成因,并从委托人的角度讨论了风险治理的原则和投资契约的构造。     

枸杞逆流浸提工艺的研究

以浸提效率作为评价指标，就枸杞逆流浸提工艺过程中的浸提温度、浸提时间、浸提级数及固液比进行了研究，得出了优化的逆流浸提工艺条件。     

不同地理种源沙棘苗期抗逆性试验研究

采用多维灰色评估的方法对参试的２３个不同地理种源的沙棘苗期抗性进行的综合评判结果表明：就黄土高原沟壑区而言，华北种源区的沙棘苗期抗逆性极强；原苏联、蒙古、尼泊尔和我国新疆等高寒地区的沙棘苗期抗逆性极差，表现为极端不适应。河北丰宁、辽宁建平罗扶沟、山西关帝山和大岳山等产地应作为黄土高原沟壑区营造经济型沙棘林的主要调种区域。     

Form-finding System for Cable membrane Structures Based on ANSYS

Form finding of a cable membrane simulated by ANSYS is a time consuming process and requires high user analytical ability. This is due to the complexity of the steps and the characteristics of ANSYS. We analyzed the theory of the finite element method for form finding, summarized the form finding steps, and put forward how to conduct it in ANSYS. A system using APDL and User Luterface Design Language(UIDL) based on ANSYS was derived. An example was taken to check the accuracy and practicability of the system. This new system can save the engineering designer time and energy and also provide references for the future work.     

闽糖92-505的品种特性及遗传组成研究

摘 要：为了更好地了解闽糖92-505的特性,为闽糖92-505大面积示范推广提供技术指导,对闽糖92-505从品种比较试验、福建省预备区域试验到国家区域试验的结果进行分析研究。结果表明：闽糖92-505萌芽率为74.66%,比对照种闽糖70-611高2.07%。分蘖率为109.06%,比闽糖70-611高33.51%。株高为296cm,比闽糖70-611低12cm。茎粗2.560cm,比闽糖70-611低0.013cm。有效茎数为84055条/ hm2,比闽糖70-611多18339条/ hm2,平均蔗茎产量118.424t/ hm2,11-2月份平均蔗糖份15.05%,平均含糖量17.887t/ hm2,比闽糖70-611增产24.30%、蔗糖份提高0.87个百分点,增糖32.20%。闽糖92-505早熟,高产稳产,适应性较广,中抗花叶病、抗黑穗病,抗旱能力中等。遗传组成分析结果表明,闽糖92-505共含有13个不同基础种质,遗传组成丰富。