不同时相呼吸阻力负荷生理、心理效应的比较

以17名健康男性青年为对象,采用两因素(总阻力值×阻力负荷时相)6×3析因实验设计,以多级估量量表(MES)评量呼吸感觉量。对不同程度、不同时相的呼吸阻力负荷的生理、心理效应进行了系统的考察与比较。主要结果如下:①在三种负荷时相下,面罩腔压力波动幅度(P)、总外呼吸功率(W_T)与总阻力值(R_T)间均呈凹向下型式函数关系; ②呼吸感觉量(S_(MES))与物理刺激量之间只是间接关系,与生理刺激量呈直接关系; ③不同负荷条件下,生理刺激量与S_(MES)间均呈凹向上型式关系。以上结果提示在制订RPE外加阻力标准时,除规定总阻力值外,在“中度”负荷水平时,还应有匹配条件的限制

呼吸阻力感觉的辨别阈梯级—一种辨别阈量表

近年来研究人对外加呼吸机械负荷的感觉体验已取得一些重要进展。但对阈上阻力负荷的研究多限于按stevens定律定量描述,而对另一重要的心理物理函数——Fechner定律在本领域的应用问题则未见提及。本实验主要目的在于考察呼吸阻力感觉是否符合Fechner定律,可否由辨别阈量表评量。因此,我们以9名健康男子为对象,测定了

Effects of nitrate and phosphate on the biochemical composi-tion of Thalassiosira weissflogii

探讨了高营养盐条件下氮浓度及氮磷摩尔比[n(N):n(P)]异动对微氏海链藻(Thalassiosiraweissflogii)的细胞碱性活性基团含量、细胞干质量、细胞形态及细胞体中碳水化合物、蛋白质、叶绿素含量,即对细胞生命力和表面吸附力的影响。结果表明,n(N):n(P)=16时,叶绿素、碳水化合物和蛋白质含量最高,生长状况及生命力最佳,有利于金属吸收,n(N):n(P)偏离16,各组份含量均减少。碱性活性基团和藻细胞大小,当n(N):n(P)=8时最大,表面吸附金属能力最强;n(N):n(P)=64时最小,不利于金属的吸附。氮磷摩尔比对微氏海链藻细胞体主动吸收和生物吸附金属的影响不同。Thalassiosira weissflogii was cultured in high levels of nutrients, and the influence of different levels of two macro-nutrients, nitrate and phosphate on biochemical composition, including the contents of carbohydrate, protein, chlorophyll, basic function group, cell dry weight and cell shape was investigated to assess the bioactivity, surface adsorption capability, i.e., the metal uptake/adsorption ability by T. weissflogii. When the ratio of nitrate to phosphate n(N):n(P) is 16, the contents of chlorophyll, carbohydrate, and protein were the highest, its growth level and bioactivity were the best, and its ability to absorb the trace element were also outstanding. But the quantity of basic function group in cellular wall and cell size was the highest when n(N):n(P) is 8, the lowest when n(N):n(P) is 64. So, the ability for bio-absorption trace element is good when n(N):n(P) is 8, and poor when n(N):n(P) is 64. So, the influences of n(N):n(P) on the metal uptake and adsorption were quite different.国家自然科学基金资助项目(40131160735,40506020);; 福建省科技三项费用资助项目(K02093);; 福建省青年科技人才创新项目(2003J035);; 福建省教育厅A类项目(JA00233

小流域生态经济系统模式研究

本研究系吉林省科技攻关项目，是吉林省生态建设的重要内容之一，该项目以东北低山丘陵区吉林省东辽县黑牛河流域为重点，运用水土保持学、恢复生态学及经济学理论，系统地研究该区小流域生态经济系统建设、诊断、模式与优化结构及可持续发展评价。分析诊断指标体系建立及系统健康诊断，生态经济系统优化模式与结构（生态经济和环境整治措施与配置优化），东北低山丘陵区特殊地形水土保持措施及其配置和可持续发展评价指标体系与评价方法是限制该区生态环境建设的关键，也是解决该问题的主要支撑技术。在15.32cm平方公里的黑牛河流域通过全面的综合调查，系统分析，建立健康诊断指标体系，进行病理诊断，开展水保措施与配置和结构优化试验示范，建设实体模型。同时开展可持续发展评价指标体系研究，进行可持续发展评价，检验建设成果。该项目由吉林省水土保持研究主持，中科院教育部水土保持与生态环境研究中心与北京林业大学水土保持学院为协作单位，研究直接切入吉林省生态省建设项目，增强了研究的针对性，缩短了试验示范推广周期；由科教、生产单位科技人员组成联合攻关专题组，具有优势互补，中尺度区域性研究和试验示范互为支撑的特点；在黑牛河试验示范区成功地探索了快速、高效、持续开展生态经济系统建设的科技支撑作用，黑牛河小流域经过治理后，每年农、林、牧、副、渔和工业经济效益比治理前增加了699.36万元/年；近几年，该项成果在吉林省各区的小流域治理中得到广泛应用，应用面积为5972平方公里，其生态经济系统建设规划、植被建设布局及配置模式等在吉林省生态建设中发挥了重要指导作用，创经济效益17916万元。取得显著生态、经济和社会效益

遥感技术在塔里木河流域自然资源调查中的应用

该项课题应用航空遥感为主，结合多种信息资料，首次对我国最长的内陆河——塔里木河两岸进行资源与环境的综合性调查，完成了地貌、水系、土地类型、土地资源、土地利用、沙漠化、植被、胡杨林、草地等９种专题系列图件，共编制１∶１０万标准图幅专题图３１４幅，并编写了说明书，量算了资源、环境类型面积；获取了一套较新和系统完整的资源、环境数据；探讨了遥感应用的新方法，为合理制订流域规划和开发利用塔里木河的水资源等提供了依据

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies