A/O强化二段生物接触氧化+二氧化氯接触消毒工艺处理医疗废水实例

如何提高处理效果和减少投资,是处理医疗废水的重点.A/O强化二段生物接触氧化 二氧化氯接触消毒工艺综合了厌(兼)氧、好氧以及A-B法的优点,克服了各自的缺点,通过对河南省商丘市第一人民医院的医疗废水处理,证明该工艺是一种处理医疗废水的行之有效的工艺.     

建设项目环境影响经济评价探讨

以衡阳至昆明高速公路（衡阳至永州枣木铺段）生态影响的经济评价为实例，说明环境影响经济评价在环评中所占的重要地位，指出对建设项目进行环境影响经济评价是今后环境影响评价发展的方向。     

江苏省高速公路站区光伏能源综合利用研究

基于江苏省高速公路沿线服务区、收费站、办公楼屋面面积以及服务区停车场面积统计数据,估算了可利用屋面面积和进行光伏车棚改造的服务区停车场面积。测算了光伏屋面、光伏车棚的装机规模和发电量,结合高速公路用电情况分析了运行方式。经测算:江苏省高速公路服务区和收费站屋面可安装光伏发电总装机容量为32 MW,首年发电量为3200万kWh,全省高速公路光伏屋面25年发电总量约7.3亿kWh;江苏省高速公路光伏车棚可安装光伏发电装机容量约11 MW,25年发电总量约2.5亿kWh;高速公路站区光伏系统所发电量均小于其昼间用电量,站区光伏发电能够以“自发自用”的模式运行。     

树干输液在大树移栽中的应用

提出和采用树干输液方法提高大树移栽成活率.该方法具有简便、实用、操作容易、能显著提高移栽成活率等优点,介绍了树干输液方法、输液时期和输液剂量以及营养液的研制等内容.     

上城区生活居住环境满意率普遍调查的统计分析

2009年,杭州市上城区统计局民生民意调查中心在全区6个街道开展了市民普遍调查,调查针对市民警遗关心的五项民生内容（计生、安全生产、城市综合治理、居家养老服务、生活居住环境）展开。这份调查材料基本反映了上城区居民群众对民生关注内容的满意程度。文章重点对生活居住环境满意率这一指标进行统计分析。     

城市生活垃圾复混肥示范工程工艺设计

提出了适合我国中小城市生活垃圾的处理办法,即利用城市生活垃圾生产有机复混肥。对有机复混肥的效益分析表明,利用城市生活垃圾生产复混具有明显的环境效益,社会效益和的经济效益,是一条利国利民,造福子孙后代的城市生活垃圾处理的好办法。     

Does sex affect both individual and collective vigilance in social mammalian herbivores: the case of the eastern grey kangaroo?

In several vertebrate taxa, males and females differ in the proportions of time they individually devote to vigilance, commonly attributed to sex differences in intra-specific competition or in absolute energy requirements. However, an effect of sex on collective vigilance is less often studied (and therefore rarely predicted), despite being relevant to any consideration of the adaptiveness of mixed- vs single-sex grouping. Controlling for group size, we studied the effect of sex on vigilance in the sexually dimorphic eastern grey kangaroo Macropus giganteus, analysing vigilance at two structural levels: individual vigilance and the group’s collective vigilance. Knowing that group members in this species tend to synchronise their bouts of vigilance, we tested (for the first time) whether sex affects the degree of synchrony between group members. We found that females were individually more vigilant than males and that their vigilance rate was unaffected by the presence of males. Collective vigilance did not differ between female-only and mixed-sex groups of the same size. Vigilance in mixed-sex groups was neither more nor less synchronous than in single-sex groups of females, and the presence of males seemed not to affect the degree of synchrony between females. Sixty-six percent of vigilant acts were unique (performed when no other kangaroo was alert), and only about one unique vigilant act in every three induced a collective wave of vigilance. The proportions of vigilant acts that were unique were 60% for females but only 46% for males. However, the sexes differed little in the rates at which their unique vigilant acts were copied. This limited study shows that the differences in vigilance between male and female kangaroos had no discernible effect upon collective vigilance.     

Behavioral diversification in a young species flock of pupfish (<Emphasis Type="Italic">Cyprionodon</Emphasis> spp.): shoaling and aggressive behavior

Increasing empirical and theoretical evidence supports the idea that sympatric speciation is operating, for example, in species flocks comprising several closely related fish species within one lake. Divergent natural selection (promoting spatial and food niche partitioning) and sexual selection (assortative mating) have been identified as key selection factors in intralacustric adaptive radiations. However, the evolution of social behaviors accompanying such adaptive radiations is less well understood. Using a phylogenetically young species flock of pupfish (Cyprinodon spp.) as a model, we examined differences among six sympatric species and compared their shoaling, aggressive, and territorial behaviors with that of a sister species (C. artifrons). Despite an estimated age of the species flock of less than 8,000 years, pronounced behavioral differentiation was found. C. simus, the smallest species in the flock, shoaled more than the other species and was less aggressive and less territorial than C. beltrani. F₁-hybrids between C. simus males and C. beltrani females showed an intermediate expression of shoaling and aggressive behavior. Niche partitioning among the members of this species flock appears to be accompanied by rapid divergent evolution of social behaviors. We discuss the potential role of phenotypic plasticity and within-species variation of social behaviors for such rapid behavioral diversifications in sympatric speciation processes.     

模拟池塘生态系统中单甲脒对微生物种群和存活的影响

研究了单甲脒（Ｎ－２,４－二甲苯基－Ｎ’－甲基甲脒,简称ＤＭＡ）对模拟池塘生态系统中微生物种群的影响,试验结果表明,投加单甲脒盐酸盐（ＤＭＡＨ）对底泥微生物种群无明显影响,而对水生微生物的最主要种群－－好氧异养菌总量则有明显促进的影响,微生物生长和存活试验表明,只有高于５０ｍｇ／Ｌ的ＤＭＡＨ对水中好氧异养菌的生长存活才有抑制作用,底泥中的好氧异养菌和未受污染的底泥酵母菌的ＤＭＡＨ抑制浓度也是５０ｍ     

农村集体建设用地流转问题分析

研究目的,分析农村集体建设用地流转中存在的问题,并分析导致原因,为完善集体建设用地市场提供建议。研究方法:文献资料法,归纳法。研究结果:集体建设用地流转中主要存在市场化受限,违法现象突出和利益分配不合理等问题,造成这些问题的原因是价格机制、信息不充分和现行法律法规不完善。