水电建设项目移民对生态环境的影响分析

水电建设项目通常会引起淹没与移民,其搬迁将对安置区的生态环境产生影响。实例分析了某水电建设项目移民安置区的移民容量,评价了移民搬迁对安置区生态环境的影响,以及安置区条件对移民生活质量的影响等问题,依此提出了项目建设过程中减缓生态环境破坏的相应措施,并对安置区工程建设提出了必要的监理制度。分析结果可为类似建设项目的环境影响评价提供借鉴,为更好地落实各项生态环保措施及＂三同时＂制度提供依据。     

山区高速公路建设对野生动物的影响及其生境评价

在分析高速公路建设对野生动物影响的基础上,讨论了对野生动物监测的内容、方法,提出了野生动物生存繁衍的定量评价方法及生存环境的定性评价标准。应用该方法可实时掌握和预测野生动物繁衍发展的情况,为公路环保设计提供参考。     

广西2009~2010年夏秋冬春连旱气候特征分析及影响评价

采用统计学的方法,分析了广西2009~2010夏秋冬春连旱的气候特征;并根据灾情收集资料,对此次干旱对农业、林业、江河航运、水库蓄水、水力发电、旅游、人民生活等方面产生的影响进行评价分析。结果表明,2009年8月~2010年4月,广西发生了持续8个月的夏秋冬春连续严重干旱,干旱具有持续时间长、范围广、干旱级别高的特征,由此对广西的农业、林业、水力发电、江河航运、水库蓄水、人民生活等方面都产生了不同程度的影响,同时提出了广西干旱防御对策。     

低温冻害对油菜产量的影响

分析了低温冻害对荆州油菜产量的影响,为今后的防冻救灾工作提出建议。     

20世纪末21世纪初陕西农业科技发展及其影响

从作物良种选育、动植物病虫害的研究与防治以及实用农业关键技术等方面介绍了20世纪末21世纪初陕西农业科技发展的现状,并就这些科技成就对障西农业经济所产生的影响进行了分析。     

多宝山铜矿开发的必要性及对其资源环境的影响

以黑龙江多宝山铜矿为例,探讨了开发东北、内蒙地区国有林区大型矿区的深远影响,并从生物多样性、生态效能、景观风貌、环境质量等多方面着手,重点分析了开发多宝山铜矿对国有林区森林资源和生态环境的影响,最后提出了相应的建议与措施。     

Green composites from maleated castor oil and jute fibres

Castor oil was converted to maleated castor oil (MACO) without any catalyst. MACO was characterized with FTIR, NMR, molecular weight and viscosity measurement. Tung oil (20 wt%) was added to MACO as reactive diluent. Non-woven jute felts were used as reinforcing material. The MACO was polymerized and crosslinked in situ during composite fabrication. The curing behavior of MACO with free radical catalyst was investigated by differential scanning calorimetry (DSC). The MACO/jute composites were tested for their flexural properties, impact strength and dynamic mechanical properties and compared with similar unsaturated polyester resin/jute composites. The flexural moduli of both the composites were nearly similar. The impact strength of MACO/jute composites was 42% higher than that of UPE/jute composites. The damping property of the MACO/jute composites was higher than that of UPE/jute composites over a wide range of temperature.     

Effects of Liquid Crystalline Epoxy Resin on the Properties of Bio-based Cardanol-furfural Resin北大核心CSCD

By using polarized optical microscopy, differential scanning calorimetry, scanning electron microscopy and impact strength measurements,the effects of liquid crystalline on the morphologies, thermal properties and mechanical properties of the composite resins were studied. It was found that the synthesized 4,4-diglycidyloxybiphenyl (BP) and sulfanilamide (SAA) were used to generate novel liquid crystalline (LC) epoxy resins notably. The results revealed that the curing of the cardanol-furfural resins was accelerated and the thermal properties were considerably improved by adding the LC epoxy resins.When the addition of BP-SAA was 50%, the glass transition temperature increased from 60.4 ℃ to 70.2 ℃, and the thermal decomposition temperature increased from 300.3 ℃ to 377.4 ℃, respectively. When the addition of BP-SAA was 30%, the impact strength of the modified resins was 15 kJ/m2 and about three-fold higher than that of the unmodified counterpart. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

石岛地区气候变化对农业生产的影响

利用石岛地区1981—2010年气温与降水观测资料,采用统计分析方法,对近30年石岛地区的气候变化特征及其对农业生产的影响进行分析。结果表明,近30年石岛地区年平均气温以0.205℃/10 a的速度上升,除秋季外,春、夏、冬各季平均气温均呈上升趋势;年降水量以33.4 mm/10 a的速度缓慢增加,春、夏、秋季降水量均呈缓慢上升趋势,冬季降水量呈缓慢减少趋势。气候变暖对农业生产有利有弊,灾害性天气和极端降水事件将有所增加,干旱和洪涝可能趋于增加,对农业生产影响较大。     

四方井水库建设主要生态环境影响及其保护措施

以拟建的四方井水库为例,从水库蓄水与淹没、大坝阻隔及上下游河道径流变化等方面,分析水库建设和运行对陆生动植物、水生生物及鱼类资源产生的影响;针对主要生态影响,结合工程布置、区域特点和景观要求,提出可行的对重点保护动植物、古树名木、鱼类资源、生态流量的保护措施,以期最大限度地降低不利生态环境影响,使工程经济效益、生态效益和社会效益得到协调发展。