Metal glycinate chelates are formed by glycine and metal compounds through chemical reactions.Calcium glycinate,magnesium glycinate and zinc glycinate are kinds of new-type and ideal nutrient supplements,which have sa...Metal glycinate chelates are formed by glycine and metal compounds through chemical reactions.Calcium glycinate,magnesium glycinate and zinc glycinate are kinds of new-type and ideal nutrient supplements,which have satisfactory physico-chemical properties and bioactivities.They are important for prophylaxis and treat metal deficiency.The structural characterization shows that the metal ion is bonded to the amino and carboxyl group to form two five-membered rings.This paper mainly studies the structure characterization of the metal chelated glycinates by their solubility,infrared spectrum,thermal analysis,mass spectrometry,polycrystal difrac-tion,the metal contents and glycine contents of calcium glycinate,magnesium glycinate and zinc glycinate.展开更多
文摘Metal glycinate chelates are formed by glycine and metal compounds through chemical reactions.Calcium glycinate,magnesium glycinate and zinc glycinate are kinds of new-type and ideal nutrient supplements,which have satisfactory physico-chemical properties and bioactivities.They are important for prophylaxis and treat metal deficiency.The structural characterization shows that the metal ion is bonded to the amino and carboxyl group to form two five-membered rings.This paper mainly studies the structure characterization of the metal chelated glycinates by their solubility,infrared spectrum,thermal analysis,mass spectrometry,polycrystal difrac-tion,the metal contents and glycine contents of calcium glycinate,magnesium glycinate and zinc glycinate.
文摘利用原子转移自由基聚合(ATRP)方法,分别在三氟甲苯、含氟离子液体以及三氟甲苯/含氟离子液体混合溶剂体系中合成了聚苯乙烯-co-聚(2,3,4,5,6-五氟苯乙烯)(PS-co-PPFS)共聚物,通过1H NMR、19F NMR、元素分析以及凝胶渗透色谱法(GPC)对所得聚合物的分子链结构和组成进行了分析和表征.随后,利用静态呼吸图法分别在CS2,CHCl3和CH2Cl2中制备了有序多孔薄膜,用扫描电子显微镜(SEM)观察其表面形貌,并与利用分子量大小相当的聚苯乙烯均聚物(PS)制备的多孔薄膜进行了对比.研究结果表明:在三氟甲苯和含氟离子液体溶剂体系中,均可利用ATRP聚合方法获得窄分子量分布的PS-co-PPFS共聚物(Mn=5200～7900 g mol-1,Mw/Mn=1.12～1.22).对聚合物薄膜的扫描电子显微镜(SEM)观察和分析显示:分别以CS2,CHCl3和CH2Cl2作为溶剂,利用静态呼吸图法均可制备出PS-co-PPFS共聚物多孔薄膜.然而,与在CHCl3和CH2Cl2中制备的PS均聚物多孔薄膜的表面形貌不同的是,PS-co-PPFS共聚物多孔薄膜呈现出无序排列、平均孔径大小不同的两种孔结构;在CHCl3中制备所得薄膜的孔结构有序性相对较好,两种孔的平均孔径分别为0.75和0.37μm.
