共查询到19条相似文献,搜索用时 62 毫秒
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文章叙述青海省14科20属49种蕨类植物的种类、分布、生境和资源特点,分析了它们的经济价值,社会价值,开发利用前景及其与环境保护之间的关系,提出了合理开发利用意见,为决策和生产提供了依据。 相似文献
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生物芯片技术是一项发展迅速的高新技术,广泛应用于生物、医学、农业、环境检测和食品科学等领域,市场前景十分广阔。阐述了生物芯片的基本概念、分类及其主要应用,并对其发展前景作了展望。 相似文献
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持续合理利用待开发土地资源是发挥农业生产潜力和缓解人地矛盾的主要途径之一.本文在分析河北省待开发土地资源的开发条件基础上,提出了持续利用的前景和对策. 相似文献
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在对乌鲁木齐市的公园、道路、庭院园林绿化中彩叶树种进行初步调查的基础上,依据文献资料对乌鲁木齐市彩叶树种观赏季节及叶色特性进行了初步分类,说明了其观赏特性与园林绿化应用,提出合理应用彩叶树种的建议,为乌鲁木齐市彩叶树种的引种、选择和应用提供科学依据。 相似文献
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介绍了玻璃电熔技术处理工业固体废物的基本原理、主要优点、应用实例及开发情况,对该技术的应用前景进行了预测。 相似文献
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研究了以HNO3-HCl为提取剂、电感耦合等离子发射光谱法(ICP-OES)同时测定土壤中重金属As、Pb、Cr、Cu、Zn、Cd、Ni共7种元素的可给态的方法。实验结果表明,土壤中重金属可给态经HNO3-HCl提取后完全分解,采用内标法可以提高测定的准确度和精密度,该方法加标回收率为90.9%~106.3%,精密度〈3%,具有较好的准确度和精密度,是一种快速、高效的分析方法。 相似文献
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生物抗菌肽的应用及市场开发前景 总被引:1,自引:0,他引:1
抗菌肽广泛分布于生物体内,具有广谱抗菌能力,是天然的免疫防御系统,对病毒及癌细胞也有抑制作用。与传统抗生素作用机理不同,抗菌肽不会产生抗药菌株,是新一代抗生素的理想替代者,具有极好的市场开发前景。 相似文献
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三峡库区土壤中微量元素有效态含量及其特征 总被引:2,自引:0,他引:2
本文研究了微量元素在三峡库区土壤中的有效态含量以及丰缺程度,发生频率等特征,同时,初步探讨了有效态微量元素之间及其与土壤pH值,有机质含量的相关关系。 相似文献
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本文建立了三峡库区土壤中有效态微量元素含量的区划原则。根据确立的有效态微量元素含量丰缺的指标,运用等值线图法,采用微机处理,最后将库区划分为八个土壤亚区。 相似文献
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Huanyu Chang Yong Zhao Qingming Wang Jianhua Wang Haihong Li Jiaqi Zhai Jingyan Han Shan Jiang 《Journal of the American Water Resources Association》2020,56(2):230-246
Since its implementation in 2015, the Middle Route of the South‐to‐North Water Diversion Project (MR‐SNWDP) has transferred an average of 45 billion cubic meters of surface water per year from the Yangtze River in southern China to the Yellow River and Hai River Basin in northern China, but how that supply is able to cope with droughts under different scenarios has not been explored. In this study, using the water demand for 2020 as the guaranteed water target, a Water Evaluation and Planning system was used to simulate available water supplies in Beijing under different drought scenarios. In the case of a single‐year drought, without the MR‐SNWDP, Beijing’s water shortage ratio was 16.7%; with the MR‐SNWDP, this ratio reduced to 7.3%. In the case of a multi‐year drought, without the MR‐SNWDP, Beijing’s water shortage ratio was 25.3%; with the MR‐SNWDP, this ratio reduced to 7.4% and domestic water supply was improved. Our research suggests that to prepare for multi‐year drought in the Beijing area, the SNWDP supports increased supplies to the region that would mitigate drought effects. This study is, however, mostly focused on water supply provision to Beijing and does not comprehensively evaluate other potential impacts. Multiple additional avenues could be pursued that include replenishing groundwater, increasing reservoir storage, and water conservation methods. Further research is needed to explore the relative costs and benefits of these approaches. 相似文献
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Xu Zhao Rong Chen Qiang Liao Yong-Zhong Wang Jo-Shu Chang 《International Journal of Green Energy》2015,12(10):1037-1045
In the present study, three-dimensional numerical simulations are conducted on hydrodynamics and light-intensity distribution of microalgae fluid flow in a helical tubular photobioreactor for CO2 capture. The effect of incident direction of the light illumination is discussed and the light/dark cycle frequency experienced by the microalgae fluid in the cross-section of the photobioreactor is investigated. The simulation results reveal the steadily nonhorizontal and unsymmetrical Dean roll-cells of the microalgae fluid flow in the cross-section of the helical tube. The external light projecting onto the helical tubular photobioreactor from the center is a better way for microalgae cultivation. The light/dark cycle frequency of the microalgae fluid flow is calculated based on the light-intensity distribution inside the photobioreactor. The light/dark cycle frequency keeps constant for the same stream trace of the microalgae flow while varies with different flow regions. Meanwhile, the light/dark cycle frequency increases with the increase in microalgae fluid velocity. The suitable demarcation between the light and the dark zone depends on the shape and the location of the Dean roll-cells. 相似文献