高校生物实验室的环境污染及防治措施

生物实验室是一类典型的小污染源,其污染物种复杂、毒性强,对实验人员及环境的危害大。本文分析了目前我国高校生物实验室存在的污染种类及危害,并针对不同污染提出了相应的防治措施。     

普通高校生物实验室安全隐患及防治措施

生物实验室是一个不容忽视的小型污染源,主要涉及化学污染和微生物污染、实验动物污染三大污染源。其污染种类较多、毒性较强,给实验室的工作人员身体和环境都带来极大危害。本文就这三大污染源阐述了其安全隐患并提出相应的防治措施。     

强化环保意识,创建绿色生物实验室

阐述了湛江师范学院生物实验室“三废”(废气、废液、废渣)的排放对环境污染和对人体的危害,论述了创建绿色生物实验室的重要性和必要性。提出以创建绿色实验室为目标,强化环保意识,从源头上减少污染(改进实验方法、实验装置)、正确处理实验室“三废”的排放”和建立有效的规章制度等方面入手,加强实验室“三废”排放的综合性、预防性措施,创建绿色生物实验室。     

试论环境监测实验室的污染与防治处理方法

本文主要分析了环境监测实验室产生的污染种类及危害,同时对不同污染提出了相应的处理方法。阐明实验室是一种不容忽视的污染源,提出相应的防治处理对策。     

大气环境化学污染及其防治措施研究

大气环境化学污染是环境污染的重要组成部分.大气环境化学污染对人体、其他生物、器物,乃至全球环境都有严重的危害.本文主要是从大气污染的概念和危害角度,研究了大气环境化学污染防治的物理与化学等技术防治措施.     

试论实验室的环境污染与防治措施

阐述了实验室环境污染的严重性和治理实验室污染的必要性，分析了我国实验室存在的污染及危害以及造成实验室环境污染的主要原因。提出了通过制定相应的法律法规；建立实验室环境管理体系；建立督察机构；全面推行绿色化学、清洁实验；做好预防措施。妥善处理实验后废弃物等多种措施解决实验室环境污染问题。     

农业中的化学污染及防治途径

简述了农业中化学污染的层面及化学污染对水、土壤和生物的危害，探讨了农业中化学污染的防治途径。     

创建绿色化生物实验室的探讨

建立绿色化生物实验室是生物实验室的发展趋势,是可持续发展的必然要求。文中从培养绿色化生物实验室理念、加强实验源头的管理、营造清洁的实验室环境、重视实验废弃物的处理等方面对创建绿色化生物实验室进行了探讨,取得了一定效果。创建绿色化生物实验室是降低生物实验室造成污染的一条有效途径。     

高校实验室环境污染现状与防治对策

该文分析了高校实验室污染物的种类及危害,阐明高校实验室是一类典型的污染源,对实验人员和环境危害大,必须加强对高校实验室的环境保护,并针对不同污染提出了相应的防治对策和具体措施。     

化学实验室常见废水的回收处理

总结实验室废水的收集和管理方法,剖析化学实验废水对环境的污染、危害及原因,探讨和总结不同来源、不同浓度实验废水的处理和回收方法,以期指导高校化学实验室废水的收集、管理、回收、综合再利用,保护实验室及周边环境,减少水源污染．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with