The single crystal nickel salicylate tetrahydrate was prepared with the rheological phase reaction method from nickelous hydroxide and salicylic acid. The crystal structure was determined. It is monoclinic, space grou...The single crystal nickel salicylate tetrahydrate was prepared with the rheological phase reaction method from nickelous hydroxide and salicylic acid. The crystal structure was determined. It is monoclinic, space group P2 1/n, a= 0.678 74 (3), b=0.515 91(2), c =2.313 30(9) nm, β= 90.928 6(17)° , V =0.809 94(6) nm 3, Z=2, ρ calcd = 1.661 g\5cm -3 . Final R indices: R =0.027 9 and wR= 0.065 0 \[I >2σ(I)\]. The thermal decomposition mechanism in an inert atmosphere was investigated via TG, DTG and DTA. The thermal decomposition products were characterized with IR and micro\|powder X\|ray diffraction method. A new coordination polymer (NiC 6 H 4 O) n as an intermediate product and nanoscale metal nickel were obtained in the ranges of 364\|429 ℃ and 429\|680 ℃, respectively.展开更多
Lanthanum-rhodamine (6G and B) complexes were synthesized by Rheological Phase Reaction Method. Lanthanum-rhodamine (6G and B) complexes doped polyethylene films which have a function of lights-conversion were prepare...Lanthanum-rhodamine (6G and B) complexes were synthesized by Rheological Phase Reaction Method. Lanthanum-rhodamine (6G and B) complexes doped polyethylene films which have a function of lights-conversion were prepared. The emission and excitation spectra were measured. The experiments of growing seedling and culture were carried out in the shed built with doped and undoped polyethylene films. Lanthanum-rhodamine doped polyethylene films which have a function of lights-conversion can efficiently convert the green light in the sunlight to the red light for photosynthesis of crops, to promote the maturing of crops and raise the yield of crops.展开更多
针对目前小麦高产栽培中大量投入氮肥引起的土壤板结、肥效降低等突出问题,2013—2014和2014—2015年度大田条件下设置自然降水(W1)、适墒(W2,70%±5%)、足墒(W3,80%±5%)3个水分处理和3个氮肥水平处理,即不施氮肥(N1)、减氮(N2...针对目前小麦高产栽培中大量投入氮肥引起的土壤板结、肥效降低等突出问题,2013—2014和2014—2015年度大田条件下设置自然降水(W1)、适墒(W2,70%±5%)、足墒(W3,80%±5%)3个水分处理和3个氮肥水平处理,即不施氮肥(N1)、减氮(N2,195 kg hm^(–2))和高氮(N3,270 kg hm^(–2)),研究了不同水肥条件对冬小麦旗叶功能期内光响应曲线特征参数、水分利用效率和籽粒产量及其构成因素的影响。在W1和W2条件下,N2处理不同时期旗叶净光合速率(P_n)、气孔导度(G_s)和蒸腾速率(T_r)的光响应曲线逐渐上升的幅度均高于N1和N3处理,胞间二氧化碳浓度(Ci)光响应曲线下降的幅度也大于N1和N3处理;在W3条件下,N2、N3光响应曲线的变化趋势相近。N2W2处理的旗叶光合参数在开花期最具优势,最大净光合速率为33.20μmol CO_2 m^(–2) s^(–1),光饱和点达1507.4μmol m^(-2) s^(-1),分别比其他处理平均提高21.4%和9.5%,而光补偿点最低,表现出较高的光合潜能。连续两年产量结果显示,N2W2处理穗粒数和千粒重在9个处理中最高,差异显著(P<0.01);籽粒产量在9500 kg hm^(–2)以上,水分利用效率比W2和W3条件下的其他处理平均提高18.8%。上述结果表明,在适墒条件下施氮量从270 kg hm^(–2)减少至195 kg hm^(–2),能充分发挥旗叶功能期的光合潜力,增加穗粒数和千粒重,提高籽粒产量。展开更多
利用耦合了污染源在线追踪模块的化学传输模式NAQPMS(Nested Air Quality Prediction Model System),结合地面细颗粒物(PM_(2.5))的小时观测数据,模拟了2014年1、4、7、10月4个月份武汉地区PM_(2.5)浓度时空分布特征,量化了本地、武汉...利用耦合了污染源在线追踪模块的化学传输模式NAQPMS(Nested Air Quality Prediction Model System),结合地面细颗粒物(PM_(2.5))的小时观测数据,模拟了2014年1、4、7、10月4个月份武汉地区PM_(2.5)浓度时空分布特征,量化了本地、武汉城市圈及远距离地区对武汉PM_(2.5)浓度贡献.研究发现,2014年武汉市PM_(2.5)年均浓度为85.3μg·m-3,污染天(PM_(2.5)日均值≥75μg·m-3)占全年总天数的47.9%.细颗粒物的月均值呈现出季节性特征,即冬季污染最为严峻,1月均值为199.1μg·m-3,PM_(2.5)浓度超标持续一整月;夏季空气质量最好,春秋介于两者之间.模拟的PM_(2.5)平均浓度在空间上大致呈现"城区高,郊区低"的分布态势.污染物区域来源解析发现,武汉市本地排放源贡献在1月最低,为34.1%,表明外来源贡献对长期灰霾的形成起决定性作用.7月本地源影响最显著(65.7%),和毗邻城市源(23.1%)一起成为夏季污染物的主要来源.4月和10月本地排放贡献比分别为49.1%和42.1%.4个月份,武汉城市圈对该市PM_(2.5)浓度的贡献差异不大,范围在20.8%~24.1%.受大尺度天气系统的影响,远距离传输贡献率趋势与本地来源相反,占10.6%~35.3%.研究结果表明污染气团跨界输送对武汉不同季节PM_(2.5)浓度有重要贡献.在冬季大范围污染背景下,污染物区域大范围协同控制才能有效减缓武汉PM_(2.5)污染问题;而夏季对本地及近周边城市的减排措施可以有效改善武汉的空气质量.展开更多
文摘The single crystal nickel salicylate tetrahydrate was prepared with the rheological phase reaction method from nickelous hydroxide and salicylic acid. The crystal structure was determined. It is monoclinic, space group P2 1/n, a= 0.678 74 (3), b=0.515 91(2), c =2.313 30(9) nm, β= 90.928 6(17)° , V =0.809 94(6) nm 3, Z=2, ρ calcd = 1.661 g\5cm -3 . Final R indices: R =0.027 9 and wR= 0.065 0 \[I >2σ(I)\]. The thermal decomposition mechanism in an inert atmosphere was investigated via TG, DTG and DTA. The thermal decomposition products were characterized with IR and micro\|powder X\|ray diffraction method. A new coordination polymer (NiC 6 H 4 O) n as an intermediate product and nanoscale metal nickel were obtained in the ranges of 364\|429 ℃ and 429\|680 ℃, respectively.
文摘Lanthanum-rhodamine (6G and B) complexes were synthesized by Rheological Phase Reaction Method. Lanthanum-rhodamine (6G and B) complexes doped polyethylene films which have a function of lights-conversion were prepared. The emission and excitation spectra were measured. The experiments of growing seedling and culture were carried out in the shed built with doped and undoped polyethylene films. Lanthanum-rhodamine doped polyethylene films which have a function of lights-conversion can efficiently convert the green light in the sunlight to the red light for photosynthesis of crops, to promote the maturing of crops and raise the yield of crops.
文摘针对目前小麦高产栽培中大量投入氮肥引起的土壤板结、肥效降低等突出问题,2013—2014和2014—2015年度大田条件下设置自然降水(W1)、适墒(W2,70%±5%)、足墒(W3,80%±5%)3个水分处理和3个氮肥水平处理,即不施氮肥(N1)、减氮(N2,195 kg hm^(–2))和高氮(N3,270 kg hm^(–2)),研究了不同水肥条件对冬小麦旗叶功能期内光响应曲线特征参数、水分利用效率和籽粒产量及其构成因素的影响。在W1和W2条件下,N2处理不同时期旗叶净光合速率(P_n)、气孔导度(G_s)和蒸腾速率(T_r)的光响应曲线逐渐上升的幅度均高于N1和N3处理,胞间二氧化碳浓度(Ci)光响应曲线下降的幅度也大于N1和N3处理;在W3条件下,N2、N3光响应曲线的变化趋势相近。N2W2处理的旗叶光合参数在开花期最具优势,最大净光合速率为33.20μmol CO_2 m^(–2) s^(–1),光饱和点达1507.4μmol m^(-2) s^(-1),分别比其他处理平均提高21.4%和9.5%,而光补偿点最低,表现出较高的光合潜能。连续两年产量结果显示,N2W2处理穗粒数和千粒重在9个处理中最高,差异显著(P<0.01);籽粒产量在9500 kg hm^(–2)以上,水分利用效率比W2和W3条件下的其他处理平均提高18.8%。上述结果表明,在适墒条件下施氮量从270 kg hm^(–2)减少至195 kg hm^(–2),能充分发挥旗叶功能期的光合潜力,增加穗粒数和千粒重,提高籽粒产量。
文摘利用耦合了污染源在线追踪模块的化学传输模式NAQPMS(Nested Air Quality Prediction Model System),结合地面细颗粒物(PM_(2.5))的小时观测数据,模拟了2014年1、4、7、10月4个月份武汉地区PM_(2.5)浓度时空分布特征,量化了本地、武汉城市圈及远距离地区对武汉PM_(2.5)浓度贡献.研究发现,2014年武汉市PM_(2.5)年均浓度为85.3μg·m-3,污染天(PM_(2.5)日均值≥75μg·m-3)占全年总天数的47.9%.细颗粒物的月均值呈现出季节性特征,即冬季污染最为严峻,1月均值为199.1μg·m-3,PM_(2.5)浓度超标持续一整月;夏季空气质量最好,春秋介于两者之间.模拟的PM_(2.5)平均浓度在空间上大致呈现"城区高,郊区低"的分布态势.污染物区域来源解析发现,武汉市本地排放源贡献在1月最低,为34.1%,表明外来源贡献对长期灰霾的形成起决定性作用.7月本地源影响最显著(65.7%),和毗邻城市源(23.1%)一起成为夏季污染物的主要来源.4月和10月本地排放贡献比分别为49.1%和42.1%.4个月份,武汉城市圈对该市PM_(2.5)浓度的贡献差异不大,范围在20.8%~24.1%.受大尺度天气系统的影响,远距离传输贡献率趋势与本地来源相反,占10.6%~35.3%.研究结果表明污染气团跨界输送对武汉不同季节PM_(2.5)浓度有重要贡献.在冬季大范围污染背景下,污染物区域大范围协同控制才能有效减缓武汉PM_(2.5)污染问题;而夏季对本地及近周边城市的减排措施可以有效改善武汉的空气质量.
