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2000年11月6日至10日是全国第十届节能宣传周。今年节能宣传周活动的主题是:依法节能,节约增效。这次活动的目的,一是要通过继续宣传贯彻《中华人民共和国节约能源法》及其配套法规,提高全民的节能意识、资源意识和环境意识,使节能工作与完成我国经济和社会发展跨世纪战略目标、国有大中型企业三年改革脱困任务紧密结合起来,开创节能工作的新局面; 相似文献
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以滴液成球法制备的壳聚糖凝胶球为基体,依次通过Mn2+印迹,交联和半胱氨酸接枝合成了Cys-Mn-CCTS-1、Cys-MnCCTS-2 2种吸附树脂,通过SEM扫描、FTIR光谱对材料的结构进行了表征,并进行了低浓度Mn2+的静态吸附实验。研究表明,两种吸附材料对Mn2+去除率均达到70%;在干扰离子Ca2+和Mg2+总浓度达到200 mg/L时,Cys-Mn-CCTS-2对Mn2+的去除效率仍达到71.7%,表现出了一定的抗干扰能力;当Co2+、Mn2+共存时,Cys-Mn-CCTS-1和Cys-Mn-CCTS-2对Mn2+的吸附容量随Co2+浓度增大而减小,Co2+对后者影响相对更大。 相似文献
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计算机和网络的迅猛发展和普及 ,信息的获取、交互、传播更加方便快捷。互联网作为全球最大的信息资源库似乎有取之不竭用之不尽的浩繁的信息。这些信息它几乎涉及到社会生活的方方面面。不论你的志趣爱好、职业类型、学识水平是什么 ,在其中总能找到许多你感兴趣的内容。因此 ,有的人无节制地沉湎于网络上 ,花费大量时间和精力在互联网上持续聊天、浏览 ,以致影响了正常的工作和生活。更有甚者 ,其心理都产生了一些障碍 ,在生活中出现各种行为异常、心理障碍、人格障碍、交感神经功能部分失调。这种病态反应叫做互联网成瘾综合症(英文简称… 相似文献
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宋昕旖聂瑾璐杨梦涵喻懋椿陶梁明冯虎元潘建斌 《应用与环境生物学报》2022,(6):1527-1533
Polygonum viviparum, which reproduces sexually and asexually, is widely distributed in the Qinghai-Tibet Plateau, and its reproduction strategies are very sensitive to changes in the environment. This study aimed to elucidate the effect of altitude on the photosynthetic characteristics and reproductive strategies of P. viviparum. This study was conducted to investigate the responses of photosynthetic, vegetative, and reproductive traits of P. viviparum populations along six altitudinal gradients in the eastern part of the Qilian Mountains in China. Our results indicated that, with increasing altitude, the net photosynthetic rate of P. viviparum showed an increasing trend, reaching its maximum value (14.39 μmol m–2 s–1) at 3 700 m above sea level. The transpiration rate showed an increasing trend, followed by a decreasing trend, and the intercellular CO2 concentration did not differ significantly between altitudes. With increasing altitude, the plant height and leaf area of P. viviparum showed a downward trend, the aboveground and underground biomass decreased, and the specific leaf area initially decreased and then increased. However, the leaf greenness index showed an upward trend, and the number of stomata in the upper and lower epidermis of leaves initially increased and then decreased. With increasing altitude, the proportion of inflorescence length per plant (the ratio of inflorescence length to plant height), the proportion of bulbil length per inflorescence (the ratio of bulbil length to inflorescence height), and the proportion of the number of bulbils per inflorescence (the ratio of the number of bulbils to the total number of flowers and bulbils) showed an increasing trend. Air temperature and light intensity are the major environmental factors affecting the photosynthetic characteristics and functional traits of P. viviparum. Thus, P. viviparum is exposed to more environmental stresses and obtains less energy when altitude increases, but it adapts to the harsh alpine environment by increasing the photosynthetic capability per unit area. With increasing altitude, P. viviparum populations may be sustained by investing less energy in vegetation and more in reproduction, especially asexual reproduction. © 2022 Science Press. All rights reserved. 相似文献
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节能,利于当代惠及后世,是一项利国利民的千秋功业,是我国的既定国策;节能,关乎生产成本,维系持续发展,是企业的振兴之路;节能,是一项长期的、全民性的工作,也是一项综合系统工程。如何才能更好和更有效地开创节能降耗、增收节支的新局面呢?值此全国人民同喜同庆澳门回归、迎接新世纪之际,不妨提倡大家都对节能工作多操操心。 相似文献