又见丽江

丽江的午后与夜晚这是一个慵懒的午后,阳光柔软而闲散。我在丽江的古城里,漫无目的地转悠、毫无方向地闲逛……丽江是我第二次光顾。上一次是10年前,一转眼岁月如流水,悄无声息地流逝,而古城依旧,只是集聚更多的人气,     

被子要如何保养

晾晒很多勤劳的主妇都有晒被子的习惯,尤其冬日难得的暖阳,更让人有把被子铺陈在阳光下的冲动。但是多数人都会有一些错误做法,下面列出几个晾晒中常见的错误做法:1.晾晒时间过长,次数过于频繁冬天日照时间短,因此会给人"阳光难得"的感觉,于是很多人喜欢在周末起床后就把被子搬到露台,直到傍晚日落之前才收回来。其实最佳的晾晒时间是     

Influence of sunlight on the proliferation of cyanobacterial blooms and its potential applications in Lake Taihu, China

To learn the relationship between sunlight intensity and cyanobacterial proliferations for the further control of the heavy blooms, enclosure experiment were conducted in Meiliang Bay, Lake Taihu by regulating the natural light intensities with different shading ratio （0% （full sunlight）, 10%, 25%, 50% and 75% of original natural sunlight intensities） from September to November in 2010. The results indicated that phytoplankton biomass （mean） decreased significantly when the shading ratios reached 50% or more. Higher shading ratios （e.g. 75%） were very efficient in controlling the average and total cyanobacterialbloom biomass, while 50% shading ratio was proven very effective either in controlling the peak value of phytoplankton biomass or postponing the occurrence of cyanobacterial blooms in Lake Talhu. In addition, phytoplankton composition and photosynthesis efficiency were also affected by altering the shading ratios, and in turn, they might also act on phytoplankton growth. Based on the results from the present study, intermediate shading strategies such as regulation of water level or turbidity through the hydrology regulations would probably be an effective and efficient method in controlling cyanobacterial blooms in large and shallow lakes.     

Effects of environmental factors on sulfamethoxazole photodegradation under simulated sunlight irradiation: Kinetics and mechanism

To advance the knowledge of the environmental fate of sulfamethoxazole (SMX), we systematically investigated the effects of natural water constituents and synthetic substances (i.e., TiO₂ nanoparticles (nTiO₂) and Ti-doped β-Bi₂O₃ (NTB)) on the photodegradation kinetics of SMX under xenon lamp irradiation. The photolysis of SMX in aqueous solution followed first-order kinetics. Our results showed that higher concentrations of SMX, fulvic acid, suspended sediments, NTB and higher pH value decreased the photodegradation rates of SMX, whereas H₂O₂ improved the SMX photodegradation. TiO₂ nanoparticles had a dual effect on photodegradation due to their photocatalytic activity and photoabsorption of photons. No intermediates more toxic toward Vibrio fischeri than SMX were produced after direct photolysis and photocatalytic degradation for 3 hr. The photolysis of SMX involved three pathways: hydroxylation, cleavage of the sulfonamide bond, and fragmentation of the isoxazole ring. This study lays the groundwork for a better understanding of the environmental fate of SMX.     

用加利福尼亚的阳光热咖啡

众所周知,地球上的资源已日趋短缺,照此发展,有朝一日终将走向枯竭,因此人们不断探索寻求着新能源的出现.幸运的是,目前科研人员在新能源领域已经取得了骄人进展和非凡业绩,具体表现在将阳光、熔岩和海浪转化为替代能源,并利用各种方法向太空要能源.     

阳光般的橄榄绿

在人民最需要的生死关头，英勇的解放军、武警战士冲在第一线，这象征生命的颜色遍布灾区的大地。给人们带来了生的希望。     

阳光地带弗莱堡

这是个不太为人熟悉的德国小城，但却拥有着令人瞩目的环保成绩，阳光普照下，这是一个名副其实的人间“乐园”。     

中国节能减排的“绿巨人”——施正荣：向太阳索取能源

小时候,我们经常和小朋友找到一些玻璃瓶底,洗净,然后两手稳稳地拿在阳光下,将阳光投射在瓶底上,然后将瓶底上的那个亮点照在火柴头或白纸上，看火柴头被瞬间点燃，看白纸慢慢燃烧。虽然不知道为什么，但我们知道，这是太阳的力量。     

广东揭阳光大公司注资4.9亿元与英驰集团签订了牙环保产业园区合作协议

2009年7月3日，是天津滨海英驰集团有限公司具有历史意义的一天。天津滨海英驰集团有限公司与广东揭阳光大贸易有限公司就天津静海子牙再生资源循环经济产业园区建设签订了合作协议。