检索结果-南通市图书馆

Capacity and degree of iodine absorbed and enriched by vegetable from soil

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Environmental Sciences 2003年第1期15卷 107-111页

作者： WENGHuan－xin WENGJing－ke 等 InstiuteofEnviroment＆Biogeochemistry ZhejiangUniversityHangzhou310027China DepartmentofBiology ZhejiagUniversityHangzhou310027China

To understand the biogeochemical transfer of iodine, the absorbability and bioaccumulation of iodine in tested vegetables(radish, spinach and Chinese cabbage) are examined by applying iodic fertilizer composed of kelp and diatomaceous earth. The experimental results show that when iodine in soil is not excessive, the concentrations of iodine in tested vegetables increase as the content of iodine in soil increases. The absorbability and enrichment degree of iodine in various vegetables and in various parts of the same vegetable are different, which explains that the concentration of iodine in plant is determined by the plant type and the physiological action of plant. The patience order of tested vegetables to excessive iodine is Chinese cabbage>spinach>radish. These results have theoretical and practical significance in opening up a new way for ameliorating poor iodine environment with artificial means.

关键词： iodine biogeochemical transfer absorbability vegetable IDD

Study on Shielding Effectiveness of Fabric for Electromagnetic Wave with Different Inlaid Distances of Metal Fibres

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Donghua University(English Edition) 2005年第3期22卷 133-135页

作者：孙润军来侃张建春 College of Textiles Donghua UniversityShanghai 200051 College of Textiles and material Xi’an University of Engineering Science and Technology Xi’an 710048 The Quartermaster Research Institute ofthe General Logistics Depart ment Beijing100088

The electremagnetic radicalization has become more serious. The shielding effectiveness of polyester fabrics with different inlaid distance of parallel metal fibres to electromagnetic wave was studied in this paper on special instrument made by ourselves. The results of test show that the fabric with different inlaid distances of metal fibres and the testing angle between electric field plane and parallel metal fibres of have obvious effect on the shielding effectiveness of electromagnetic wave.

关键词： electromagnetic radicalization shielding effectiveness reflectivity transmissibility absorbability polyester fabric metal fibre

PRELIMINARY STUDIES ON STRUCTURES AND PROPERTIES OF WATER-RETENTIVE, FLAME-RETARDANT ACRYLIC FIBERS

在线全文

学校读者我要写书评

暂无评论

引用

Journal of China Textile University(English Edition) 1990年第1期8卷 45-52页

作者：刘兆峰林伟平杨明远吴宗铨 Man-made Fiber Research Institute

The blend fibers of acrylonitrile-vinylidene chloride-sodium methallysulfonate copolymer(AN-VDC-SMAS) and cellulose acetate (CA) with various blend ratios were investigated bymeans of SEM, DDV, WAXD, etc. The results show that AN-VDC-SMAS and CA areincompatibale; the numerous microvoids in the blend fiber resulted from the phase seperationcan remarkably improve the water absorbability and the dyeing behavior but hardly influencethe mechanical properties. On the other hand, the crystal structure of the continuous phaseAN-VDC-SMAS is not influnced by the dispersed phase CA.

关键词： compatibility crystal perfection crystal structure morphology mechanical properties water absorbability flame retardancy dyeing saturation uptake