我国淡水鱼类柱形病病原菌柱状黄杆菌的遗传多样性

为认识我国淡水鱼类烂鳃病的病原以及柱形病在我国的发生情况,实验从发生烂鳃病的病鱼中分离细菌性病原,经过生理生化特性分析以及是否在含托普霉素的Shieh培养基中生长并形成黄色假根状菌落,是否产生降解明胶和硫酸软骨素的酶类等特性的鉴定,并结合16SrDNA序列分析,证实柱状黄杆菌(Flavobacterium columnare)是所分离的烂鳃病的病原。同时,研究也证实20世纪曾经命名为烂鳃(Gill-rot)病病原的鱼害黏球菌(Myxococcus piscicola Lu,Nie & Ko,1975)是

跨国公司财务管理讲座(七)——跨国公司营运资本的存量管理

一、概述对跨国经营企业来说,营运资本的管理主要包括两个方面,即“存量”的管理和“流量”的管理。从“存量”角度看,管理的重点在于:(1)如何处理好各种资产的组合关系,使母(总)公司及其所属各子(分)公司在流动资产上的资金占用实现最优配置。换言之,现金、应收帐款及存货等项目究竟维持何种水平最为适当？(2)跨国公司的短期资金来源(流动负债)渠道应如何选择？选择何种币种？维持何种水平最为适当？从“流量”角度看,管理的中心任务在于保证公司内部资金转移的合理性。即从整体看,如何根据多变的经济环发,合理调度资金,使之达到最

跨国公司财务管理讲座(八)——跨国公司营运资本的流量管理

一、概述从财务管理的角度看,跨国公司的显著特征就在于通过各种内部转移机制和方法,使资金和利润在公司内部各部分之间流动。因此,跨国营运资本流量管理的目标可以概括为:在跨国公司总部的统一协调下,使营运资本按照最合适的流量、流向和时机进行运转,为最大限度地提高公司整体效益而创造条件

跨国公司财务管理讲座(九)——跨国公司的转让定价策略

一、无关联企业与关联企业(一)无关联企业(nOnrElATEdEnTErPrISES)如果两个或两个以上的企业在管理、控制或资本等方面彼此无任何联系,或者相互参股的程度较低,这些企业就称为无关联企业。(二)关联企业(rElATEdEnTErPrISES)如果两个或两个以上企业在管理、控制或资本等方面存在直接或间接的联系,并达到一定程度。这些企业就称为关联企业。具体来说,关联企业是指具有以下关系之一的企业:1.在资金、经营和购销等方面,存在直接或

Control Divisions of Agricultural Non-point Source Pollution at Watershed Scale Based on GIS and Models

采用GIS技术和USLE,SCS-CN,污染物流失经验模型及AnnAGNPS机理模型相结合,对农业集约化程度较高的南方中等尺度流域进行农业非点源污染控制区划.结果表明:利用GIS和经验模型回答了流域农业非点源污染氮磷来源与贡献,标识了农业非点源污染氮磷等污染物的关键源区,发挥了经验模型所需模型参数少、研究尺度较大、效率较高的优点,通过GIS的栅格数据空间分析功能,实现了流域非点源污染的分布式模拟,识别了NPS的关键源区.借助AnnAGNPS机理模型,在模型得以校验的前提下,模拟了非点源污染管理措施方案.以模型和GIS的定量结果为依据,对九龙江流域农业非点源污染控制进行了区划,共划分了水土流失控制区、生猪养殖+水土流失控制区、化肥施用+生猪养殖控制区、水土流失+化肥施用控制区及化肥施用+水土流失控制区5类控制单元. 【英文摘要】 GIS technology and USLE,SCS-CN,nutrient losses empirical equations and AnnAGNPS model were coupled to carry on control divisions of NPS in a mediumsized watershed,located in southeast of China,with relative strong intensive agricultural activities.The results show that the integration of GIS with empirical models can help analyze major sources and contributors of NPS,and identify the critical source areas of NPS.This can not only develop the advantages of empirical equations,e.g.requiring less model paramet...福建省科技重大攻关项目(2002H009

Patterns of Agricultural Sustainable Development in Haiyuan County

海原位于宁夏南部山区,农业在海原县国民经济中占有举足轻重的地位。本文分析了海原县农业生产的过去、现状及存在的问题,剖析了海原县光、温、水、土等农业资源,并以可持续发展为理论基础,对海原今后农业发展模式进行了初步探讨,提出了减少耕地面积,退耕还林还草,大力发展畜牧业,充分利用雨水资源,提高雨水集蓄节灌综合技术,建立集水型生态农业,发展精细农业的可持续发展对策。Haiyuan is located in southern of the Ningxia Hui Autonomous Region.Agriculture plays a key role on the local economy.In this paper,the pass & present agricultural conditions and existing agriculture problems in Haiyuan were presented.Local agricultural resources such as light,temperature,water and soils were analyzed.In addition,based upon the theory of sustainable development,discussions toward the patterns of agricultural sustainable development in Haiyuan County were carried on.The authors' opinions included as follows:①decreasing the cropland,synchronously increasing forestry & grasses and adequately developing stock raising;②making fully use of rainwater resource,improving the integrated technologies of rainwater' collection,storage,saving and irrigations;③establishing local ecological agriculture;④developing local precision agriculture

Estimation of marine pollution load in West Sea and Tong'an Bay in Xiamen

主要利用采用gIS、经验排污系数法和经验模型法,对厦门湾的西海域和同安湾两个海域的陆源、海上水产养殖和大气输入源的入海污染负荷进行估算,得出这两个海域的COdMn、总氮(Tn)和总磷(TP)年入海污染通量和入海污染负荷。估算结果显示,厦门湾的入海污染负荷主要来自于陆源污染源,所占比例在75.2%以上,大气沉降污染源次之,所占的比例平均为1.2%~18.4%,而海上水产养殖带来的污染负荷所占的比例最小,平均不超过1%。In this paper,the estimation methods of GIS,the experimental coefficient of sewage disposal and estimation model were mainly used to estimate the marine pollutants loads in West Sea and Tong'an Bay in Xiamen,including the pollution sources from the land-base,atmospheric deposition and aquaculture,and the annual pollutant fluxes of CODMn,TN,TP in every sea area.The estimation results of pollution fluxes and marine pollution loads of main pollutants(CODMn,TN,TP) in every sea areas were given.The result showed that the land-based pollution holds were the largest percentage of marine loads in every sea area,over 75.2%.The pollution source from the atmospheric deposition was the second proportion of 1.2%～18.4%.The pollutant from the aquaculture was the smallest proportion,less than 1%.我国近岸典型海域环境质量评价和环境容量研究(908-02-02-03

PET碳酸饮料瓶结晶与流变性能研究

通过偏光透射法研究PET碳酸饮料瓶结晶分布情况,稳态与动态流变法研究PET树脂的流变性能,探讨PET瓶应力开裂的原因.结果表明:瓶身结晶分布不均匀,树脂分子量分布窄、有极高分子量存在、粘性太大易造成应力集中或应力残留,使PET碳酸饮料瓶耐应力开裂能力变差

Design of POCT quality management system based on the Internet of things

目的设计基于物联网的POCT质量管理系统以规范POCT质量管理。方法分析POCT质量管理存在的问题,以便携式血糖仪为例,从数据采集、传输、服务器; 管理存储等各环节设计POCT物联网质量管理系统。结果设计了基于物联网和医疗云为基础的POCT质量管理系统,该系统可实现POCT操作人员与设备管理; ,实时进行质量控制数据监控与报告管理,并方便管理者分析所管辖区域的POCT全程质量问题。结论设计的基于物联网的POCT质量管理系统具有理论可行性; 。Objective To design a POCT quality management system based on the; Internet of things so as to standardize POCT quality management. Methods; The existing problems in POCT quality management were analyzed. Taking; portable blood glucose meters as an example,the quality management; system of POCT-Internet of things was designed based on the all aspects; of data acquisition,transmission, server management and storage,etc.; Results The POCT quality management system based on the Internet of; things and medical cloud technology was designed. The system could; implement the management of POCT operators and devices,monitor the; realtime quality control data and reports,and facilitate the; administrators to analyze the quality problems in the whole process of; POCT management. Conclusion The designed POCT quality management system; based on the Internet of things has the theory feasibility.厦门市第二批青年创新创业人才计