A new coordination polymer, [（C（18）H（16）N4O（18）Y2）（H2O）]n, has been hydrothermally synthesized by reacting yttrium（Ⅲ） nitrate with 5-aminonicotinic acid and ammonium oxalate at a molar ratio of 1：1：1, a...A new coordination polymer, [（C（18）H（16）N4O（18）Y2）（H2O）]n, has been hydrothermally synthesized by reacting yttrium（Ⅲ） nitrate with 5-aminonicotinic acid and ammonium oxalate at a molar ratio of 1：1：1, and its structure was determined by X-ray crystallography with the following data： monoclinic system, space group C2/c, a = 13.4507（10）, b = 11.5829（9）, c = 16.3448（9） ？, a= 89.983（6）, β = 109.056（6）, g = 90.047（6）°, Z = 4, V = 2406.92（14） ？~3, F（000） = 1536, Dc = 2.13079 g/cm^3, R = 0.0284（1695） and w R = 0.0787（2014）. In the asymmetric unit of the compound, each Y（Ⅲ） ion is bonded to eight oxygen atoms from 5-aminonicotinic acid and oxalate groups and terminal-coordinated water molecule, resembling a highly distorted tricapped trigonal geometry. Adjacent three yttrium atoms are bridged by three identically independent oxalate groups in a side-by-side manner to form brickwall-like 2D sheets, and these sheets are further linked through π-π stacking interactions to generate a 3D supramolecular network. The photoluminescent property of the complex was investigated and the iodine capture studies show that the porous frameworks have reversible absorption ability for iodine molecule.展开更多
Objectives: Iodine is an essential nutrient needed for the synthesis of hormone thyroxin. Hormone thyroxin is involved in the metabolism of several nutrients, the regulation of enzymes and differentiation of cells, ti...Objectives: Iodine is an essential nutrient needed for the synthesis of hormone thyroxin. Hormone thyroxin is involved in the metabolism of several nutrients, the regulation of enzymes and differentiation of cells, tissues and organs. Iodine deficiency (ID) impairs the development of the brain and nervous system. It affects cognitive capacity, educability, productivity and child mortality. ID hinders physical strength and causes reproductive failure. The objective of this paper is to explore if the health impacts of ID are more common and severe among women. Design: Using primary data (notes from a visit) and secondary data, this paper examines if the effects of ID are more common and severe among Oromo women inEthiopia. Findings: The health impacts of ID are more common and severe among women. Conclusions: ID is an easily preventable nutritional problem. In Oromia, the persistence of ID is explained by the Ethiopian government’s colonial social policies. Preventing ID should be seen as part of the efforts we make to enhance capacity building, promote health, gender equity and social justice. Implications: Iodine deficiency has a wide range of biological, social, economic and cultural impacts. Preventing ID can be instrumental in bringing about gender equity and building the capacity of people.展开更多
基金supported by the Project of Guangdong Province Quality Engineering "Comprehensive Reform Pilot of Applied Chemistry Specialty"Guangdong Higher Education Letter(No.[2014]97)+1 种基金the Project of Scientific and Technological Innovation Special Fund of Guangdong University Students(No.pdjh2017b0372)the Training Programs of Innovation for Undergraduates of 2017(No.201714278030)
文摘A new coordination polymer, [（C（18）H（16）N4O（18）Y2）（H2O）]n, has been hydrothermally synthesized by reacting yttrium（Ⅲ） nitrate with 5-aminonicotinic acid and ammonium oxalate at a molar ratio of 1：1：1, and its structure was determined by X-ray crystallography with the following data： monoclinic system, space group C2/c, a = 13.4507（10）, b = 11.5829（9）, c = 16.3448（9） ？, a= 89.983（6）, β = 109.056（6）, g = 90.047（6）°, Z = 4, V = 2406.92（14） ？~3, F（000） = 1536, Dc = 2.13079 g/cm^3, R = 0.0284（1695） and w R = 0.0787（2014）. In the asymmetric unit of the compound, each Y（Ⅲ） ion is bonded to eight oxygen atoms from 5-aminonicotinic acid and oxalate groups and terminal-coordinated water molecule, resembling a highly distorted tricapped trigonal geometry. Adjacent three yttrium atoms are bridged by three identically independent oxalate groups in a side-by-side manner to form brickwall-like 2D sheets, and these sheets are further linked through π-π stacking interactions to generate a 3D supramolecular network. The photoluminescent property of the complex was investigated and the iodine capture studies show that the porous frameworks have reversible absorption ability for iodine molecule.
文摘Objectives: Iodine is an essential nutrient needed for the synthesis of hormone thyroxin. Hormone thyroxin is involved in the metabolism of several nutrients, the regulation of enzymes and differentiation of cells, tissues and organs. Iodine deficiency (ID) impairs the development of the brain and nervous system. It affects cognitive capacity, educability, productivity and child mortality. ID hinders physical strength and causes reproductive failure. The objective of this paper is to explore if the health impacts of ID are more common and severe among women. Design: Using primary data (notes from a visit) and secondary data, this paper examines if the effects of ID are more common and severe among Oromo women inEthiopia. Findings: The health impacts of ID are more common and severe among women. Conclusions: ID is an easily preventable nutritional problem. In Oromia, the persistence of ID is explained by the Ethiopian government’s colonial social policies. Preventing ID should be seen as part of the efforts we make to enhance capacity building, promote health, gender equity and social justice. Implications: Iodine deficiency has a wide range of biological, social, economic and cultural impacts. Preventing ID can be instrumental in bringing about gender equity and building the capacity of people.
基金supported by the National Natural Science Foundation of China(21402103,21772107,31471808)the China Postdoctoral Science Foundation(150030)the Research Fund of Qingdao Agricultural University's Highlevel Person(631303)~~
基金Project supported by the National Natural Science Foundation of China(Nos.21402103,21772107)the China Postdoctoral Science Foundation(No.150030)the Research Fund of Qingdao Agricultural University’s Highlevel Person(No.631303)~~
