The equilibrium data on the ternary system of NH_(4)Cl-CaCl_(2)-H_(2)O at 50℃were investigated using the wet-residue method.The experimental results show that there are three pure phase crystal areas of NH_(4)Cl,2NH_...The equilibrium data on the ternary system of NH_(4)Cl-CaCl_(2)-H_(2)O at 50℃were investigated using the wet-residue method.The experimental results show that there are three pure phase crystal areas of NH_(4)Cl,2NH_(4)Cl·CaCl_(2)·3H_(2)O and CaCl·2H_(2)O,two mixture phase crystal areas of NH_(4)Cl and 2NH_(4)Cl·CaCl·3H_(2)O,and 2NH_(4)Cl·CaCl_(2)·3H_(2)O and CaCl·2H_(2)O in the system.A new hydration double salt(2NH_(4)Cl·CaCl·3H_(2)O)was found in the ternary equilibrium system for the first time.展开更多
By means of constant control speed cooling crystallization,the influences of four additives,including lead chloride,cadmium chloride,sodium salicylate,and quaternary ammonium salt,on the crystal habit of KCl were inve...By means of constant control speed cooling crystallization,the influences of four additives,including lead chloride,cadmium chloride,sodium salicylate,and quaternary ammonium salt,on the crystal habit of KCl were investigated.The results show that the crystal habit of KCl is cube without additives,the crystal habit of KCl is ellipsoid-like in the presence of Pb^(2+),the crystal habit of KCl is strip in the presence of Cd^(2+),and the crystal habit of KCl is cavate cube in the presence of sodium salicylate.Xray diffractometry analysis reveals that these additives can change the crystal habit of KCl but not its crystal structure.展开更多
Dear Editor,Male infertility is a multifactorial heterogeneous pathological condition affecting∼7%of men.Nonobstructive azoospermia(NOA)is one of the most severe male reproductive diseases and occurs in∼1%of men of ...Dear Editor,Male infertility is a multifactorial heterogeneous pathological condition affecting∼7%of men.Nonobstructive azoospermia(NOA)is one of the most severe male reproductive diseases and occurs in∼1%of men of reproductive age.1 However,its etiology remains elusive.展开更多
The desulfurization by seawater and mineral carbonation have been paid more and more attention.In this study,the feasibility of magnesia and seawater for the integrated disposal of S02 and C02 in the simulated flue ga...The desulfurization by seawater and mineral carbonation have been paid more and more attention.In this study,the feasibility of magnesia and seawater for the integrated disposal of S02 and C02 in the simulated flue gas was investigated.The process was conducted by adding MgO in seawater to reinforce the absorption of S02 and facilitate the mineralization of C02 by calcium ions.The influences of various factors,including digestion time of magnesia,reaction temperature,and salinity were also investigated.The results show that the reaction temperature can effectively improve the carbonation reaction.After combing S02 removal process with mineral carbonation,Ca^2+removal rate has a certain degree of decrease.The best carbonation condition is to use 1.5 times artificial seawater(the concentrations of reagents are 1.5 times of seawater)at 80℃and without digestion of magnesia.The desulfurization rate is close to 100%under any condition investigated,indicating that the seawater has a sufficient desulfurization capacity with adding magnesia.This work has demonstrated that a combination of the absorption of S02 with the absorption and mineralization of C02 is feasible.展开更多
基金supported by the National Key Technology R&D Program in the 11th Five Year Plan of China(2006BAB03A10)the guiding projects of Scientific and Technological Research and Development of Hebei Province of China(07215184).
文摘The equilibrium data on the ternary system of NH_(4)Cl-CaCl_(2)-H_(2)O at 50℃were investigated using the wet-residue method.The experimental results show that there are three pure phase crystal areas of NH_(4)Cl,2NH_(4)Cl·CaCl_(2)·3H_(2)O and CaCl·2H_(2)O,two mixture phase crystal areas of NH_(4)Cl and 2NH_(4)Cl·CaCl·3H_(2)O,and 2NH_(4)Cl·CaCl_(2)·3H_(2)O and CaCl·2H_(2)O in the system.A new hydration double salt(2NH_(4)Cl·CaCl·3H_(2)O)was found in the ternary equilibrium system for the first time.
基金supported by the National Key Technology R&D Program in the 11th Five-Year Plan of China(2006BAB03A10)the guiding projects of Scientific and Technological Research and Development of Hebei Province of China(07215184).
文摘By means of constant control speed cooling crystallization,the influences of four additives,including lead chloride,cadmium chloride,sodium salicylate,and quaternary ammonium salt,on the crystal habit of KCl were investigated.The results show that the crystal habit of KCl is cube without additives,the crystal habit of KCl is ellipsoid-like in the presence of Pb^(2+),the crystal habit of KCl is strip in the presence of Cd^(2+),and the crystal habit of KCl is cavate cube in the presence of sodium salicylate.Xray diffractometry analysis reveals that these additives can change the crystal habit of KCl but not its crystal structure.
基金This work was supported by the National Key R&D Program of China(2018YFA0107702,2018YFC1004200)Strategic Priority Research Program of the Chinese Academy of Sciences(XDB19000000)+2 种基金The National Science Fund for Distinguished Young Scholars(81525011)Strategic Collaborative Research Program of the Ferring Institute of Reproductive Medicine,Ferring Pharmaceuticals and Chinese Academy of Sciences(FIRMC180307)The National Natural Science Foundation of China(31970785 and 31671496).
文摘Dear Editor,Male infertility is a multifactorial heterogeneous pathological condition affecting∼7%of men.Nonobstructive azoospermia(NOA)is one of the most severe male reproductive diseases and occurs in∼1%of men of reproductive age.1 However,its etiology remains elusive.
基金The work is supported by Science and technology project of Hebei Province(No.17273101D)Chinese Postdoctoral Science foundation(No.20I7M611142)+2 种基金National Key Research and Development Program(No.2016YFB0600500)the National Natural Science Foundation of China(Grant No.21306037)Program for Chan&jiang Scholars and Innovative Research Team in University(No.IRT14R14).
文摘The desulfurization by seawater and mineral carbonation have been paid more and more attention.In this study,the feasibility of magnesia and seawater for the integrated disposal of S02 and C02 in the simulated flue gas was investigated.The process was conducted by adding MgO in seawater to reinforce the absorption of S02 and facilitate the mineralization of C02 by calcium ions.The influences of various factors,including digestion time of magnesia,reaction temperature,and salinity were also investigated.The results show that the reaction temperature can effectively improve the carbonation reaction.After combing S02 removal process with mineral carbonation,Ca^2+removal rate has a certain degree of decrease.The best carbonation condition is to use 1.5 times artificial seawater(the concentrations of reagents are 1.5 times of seawater)at 80℃and without digestion of magnesia.The desulfurization rate is close to 100%under any condition investigated,indicating that the seawater has a sufficient desulfurization capacity with adding magnesia.This work has demonstrated that a combination of the absorption of S02 with the absorption and mineralization of C02 is feasible.
