The effect of simulated silk compounds- amino acids and their yellowing substances onphotofading of ary1methane dyes.and the influence of external factors such as oxygen.pH-value.the wave band of light source and nick...The effect of simulated silk compounds- amino acids and their yellowing substances onphotofading of ary1methane dyes.and the influence of external factors such as oxygen.pH-value.the wave band of light source and nickel salt on phototfading of the dyes on real silkare investigated. The results show that tryptophan and tyrosine well as their yellowing sub-stances accelerate photofading of arylmethane dyes;the photofading process of arylmethandyes on real silk is a photooxidation process and external factors exert different influences onit.展开更多
On August 15th, 2007 construction on the 800000t/a urea integrated unit was started in TarimPetrochemical Corporation in Kurle, Xinjiang ofnorthwestern China. China Petroleum 7th Con-struction Company undertook the co...On August 15th, 2007 construction on the 800000t/a urea integrated unit was started in TarimPetrochemical Corporation in Kurle, Xinjiang ofnorthwestern China. China Petroleum 7th Con-struction Company undertook the construction.As the biggest urea production unit in Chinatoday, the 800 000 t/a urea integrated unit adoptsthe ammonia stripping technology and jet fluid-ized bed granulation process technology, respec-tively from Snamprogetti Corporation of Italy andToyo Engineering Corporation of Japan. Wastegas and water discharged from the project aredesigned to meet the national standard.With the abundant natural gas reserves展开更多
1.The price of methanolrecovered slowly in 2009In China,after the early spring of 2008,coal prices reached record highs,the productioncosts of methanol constantlyincreased,and more and more methanol unitsceased produc...1.The price of methanolrecovered slowly in 2009In China,after the early spring of 2008,coal prices reached record highs,the productioncosts of methanol constantlyincreased,and more and more methanol unitsceased production for maintenance.Inaddition,farmers’ vigorous demand forchemical fertilizers in the spring also forcedthe integrated methanol and ammonia synthesisunits to give priorityto the productionof fertilizers.So since March 2008,展开更多
Sichuan Chemical Company Limited(Sichuan Chemical,SZ: 000155)and Sichuan Lutianhua Co.,Ltd.(Lutianhua,SZ: 000912)jointly announced on July 25th that Sichuan Chemical Holding(Group)
农田土壤已成为大气氧化亚氮（N2O）最大的人为释放源,为了解长期有机肥与无机肥配施对后茬作物土壤N2O排放的影响,本研究基于宁夏河套地区典型冬小麦-油葵复种农田生态系统,利用静态箱-气相色谱法对后茬作物（油葵）种植期内土壤N2O通...农田土壤已成为大气氧化亚氮（N2O）最大的人为释放源,为了解长期有机肥与无机肥配施对后茬作物土壤N2O排放的影响,本研究基于宁夏河套地区典型冬小麦-油葵复种农田生态系统,利用静态箱-气相色谱法对后茬作物（油葵）种植期内土壤N2O通量特征进行了测定.结果表明：前茬施肥对后茬油葵土壤N2O排放具有显著的刺激效应,N300-OM（210kg N·hm^-2无机肥、90 kg N·hm^-2有机肥）、N240-OM1/2（195 kg N·hm^-2无机肥、45 kg N·hm^-2有机肥）、N300（300 kg N·hm-2无机肥）和N240（240 kg N·hm^-2无机肥）处理下土壤N2O生长季平均通量为（34.16±9.72）、（39.69±10.70）、（27.75±9.57）和（26.31±8.52）μg·m-2·h^-1,分别是对照样地的4.09、4.75、3.32、3.15倍.施肥处理下油葵生长季内N2O总累积排放量高达1242.5-796.7 g·hm^-2,是对照组的4.67-2.99倍;在整个生长季,有机肥与无机肥配施处理N2O排放速率都维持在较高水平,各月累积排放量间无显著差异;而单施化肥处理N2O排放速率逐渐下降,生长季初期为主要排放阶段,7月累积排放量占总排放量的41.3%-41.8%;不同施肥方式下,有机肥与无机肥配施处理N2O总累积排放量显著高于单施化肥,但相同施肥方式下高氮量处理与减氮优化处理（N300-OM与N240-OM1/2,N300与N240）间差异不显著.受干旱影响,土壤水分是控制油葵田土壤N2O排放的主要环境因素.有机肥与无机肥配施处理下N2O排放速率与NH4＋-N含量呈显著正相关,而所有处理下N2O排放速率与土壤NO3--N含量均不相关,表明添加有机肥会持续改善土壤NH4＋-N供给进而增加N2O排放.展开更多
文摘The effect of simulated silk compounds- amino acids and their yellowing substances onphotofading of ary1methane dyes.and the influence of external factors such as oxygen.pH-value.the wave band of light source and nickel salt on phototfading of the dyes on real silkare investigated. The results show that tryptophan and tyrosine well as their yellowing sub-stances accelerate photofading of arylmethane dyes;the photofading process of arylmethandyes on real silk is a photooxidation process and external factors exert different influences onit.
文摘On August 15th, 2007 construction on the 800000t/a urea integrated unit was started in TarimPetrochemical Corporation in Kurle, Xinjiang ofnorthwestern China. China Petroleum 7th Con-struction Company undertook the construction.As the biggest urea production unit in Chinatoday, the 800 000 t/a urea integrated unit adoptsthe ammonia stripping technology and jet fluid-ized bed granulation process technology, respec-tively from Snamprogetti Corporation of Italy andToyo Engineering Corporation of Japan. Wastegas and water discharged from the project aredesigned to meet the national standard.With the abundant natural gas reserves
文摘1.The price of methanolrecovered slowly in 2009In China,after the early spring of 2008,coal prices reached record highs,the productioncosts of methanol constantlyincreased,and more and more methanol unitsceased production for maintenance.Inaddition,farmers’ vigorous demand forchemical fertilizers in the spring also forcedthe integrated methanol and ammonia synthesisunits to give priorityto the productionof fertilizers.So since March 2008,
文摘Sichuan Chemical Company Limited(Sichuan Chemical,SZ: 000155)and Sichuan Lutianhua Co.,Ltd.(Lutianhua,SZ: 000912)jointly announced on July 25th that Sichuan Chemical Holding(Group)
文摘农田土壤已成为大气氧化亚氮（N2O）最大的人为释放源,为了解长期有机肥与无机肥配施对后茬作物土壤N2O排放的影响,本研究基于宁夏河套地区典型冬小麦-油葵复种农田生态系统,利用静态箱-气相色谱法对后茬作物（油葵）种植期内土壤N2O通量特征进行了测定.结果表明：前茬施肥对后茬油葵土壤N2O排放具有显著的刺激效应,N300-OM（210kg N·hm^-2无机肥、90 kg N·hm^-2有机肥）、N240-OM1/2（195 kg N·hm^-2无机肥、45 kg N·hm^-2有机肥）、N300（300 kg N·hm-2无机肥）和N240（240 kg N·hm^-2无机肥）处理下土壤N2O生长季平均通量为（34.16±9.72）、（39.69±10.70）、（27.75±9.57）和（26.31±8.52）μg·m-2·h^-1,分别是对照样地的4.09、4.75、3.32、3.15倍.施肥处理下油葵生长季内N2O总累积排放量高达1242.5-796.7 g·hm^-2,是对照组的4.67-2.99倍;在整个生长季,有机肥与无机肥配施处理N2O排放速率都维持在较高水平,各月累积排放量间无显著差异;而单施化肥处理N2O排放速率逐渐下降,生长季初期为主要排放阶段,7月累积排放量占总排放量的41.3%-41.8%;不同施肥方式下,有机肥与无机肥配施处理N2O总累积排放量显著高于单施化肥,但相同施肥方式下高氮量处理与减氮优化处理（N300-OM与N240-OM1/2,N300与N240）间差异不显著.受干旱影响,土壤水分是控制油葵田土壤N2O排放的主要环境因素.有机肥与无机肥配施处理下N2O排放速率与NH4＋-N含量呈显著正相关,而所有处理下N2O排放速率与土壤NO3--N含量均不相关,表明添加有机肥会持续改善土壤NH4＋-N供给进而增加N2O排放.
