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Simultaneously inducing synthesis of semiconductor selenium multi-armed nanorods and nanobars through bio-membrane bi-templates

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science China Chemistry 2004年第6期47卷 507-511页

作者： LI Li1, WU Qingsheng1 DING Yaping2.& LI Ping3 1. department of Chemistry, Tongji university, Shanghai 2.0092. China 2. department of Chemistry, Shanghai university, Shanghai 2.0436, China 3. department of Food, Anhui agricultural university, Hefei 2.0036, China 1. department of Chemistry Tongji University 200092 Shanghai China 2. department of Chemistry Shanghai University 200436 Shanghai China 3. department of Food Anhui Agricultural University 230036 Hefei China

Multi-armed nanorods and nanobars of semiconductor selenium were simultane- ously synthesized in the light of biomineralization process through bio-membrane bi-templates of rush at room temperature. The multi-armed nanorods are 60 nm in diameter and 1.5 μm in length; the nanobars are 150 nm in diameter and 1000—1100 nm in length. The XRD pattern indicates that these nanocrystals were crystallized in the hexagonal structure with lattice constants a = 0.437 nm, c = 0.495 nm. The possible formation mechanism was investigated.

关键词： selenium, multi-armed nanorods, nanobars, bio-membrane, bi-templates.

Impact of industrial wastewater disposal on surface water bodies in Mostord area, North Greater Cairo

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Journal of Environmental sciences 2001年第4期13卷 485-490页

作者： M.F.Abdel Sabour 1, F.H.Rabie 2. T.Mostafa 3, S.A.Hassan 4 (1 soil and Water Pollution Unit, Nuclear Research Center, Egypt. 2.soil {2., Faculty of agricultural, Ain Shams university, Egypt 3 soils, Water and Environment Research Instit soil and Water Pollution Unit Nuclear Research Center Egypt. mamdouhaabour@***

The studied area (Shoubra El Khima, Bahteem and Mostorod) lies in the industrial area north of Greater Cairo. The area suffers from several environmental problems such as sewage and disposal of pollutants from the surrounding factories into the surface water pathways in the area. Water samples were collected seasonally from different waterways found in the area, domestic and or industrial liquid wastes from 12.discharge tubes of different factories (as a point source of pollution). Chemical characteristics of different water samples and its heavy metals content were determined using ion coupled plasma technique (ICP). Results indicate that industrial and domestic wastewater samples contain several toxic levels of tested heavy metals (Cd, Co, Pb and Ni) which have a serious impact on surface waterways in the area. Shebin El Qanater collector drain samples exhibited the highest levels of Cd, Co, Pb and Ni compared to other tested water bodies. Mostorod collector drain samples showed the highest levels of Zn and Cu. Industrial effluent samples collected from Cairo Company for Fabric industry had the highest amounts of total Zn Cu, Cd, Co and Pb, while Delta steel company discharges the highest amounts of total Fe and Mn. Al Ahleya Plastic Company discharges the highest amounts of total Ni. Generally, it is necessary to impose the environmental laws and its regulation regarding the industrial wastewater treatments and disposals to minimize the risk of the adverse effects of these pollutants.

关键词： industrial wastewater disposal north Greater Cairo Egypt

Comprehensive Assessment to The Nutritive Value of Pleurotus Ostreatus Growing in Vinegar—Waste Culture Materials

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Systems science and Systems Engineering 1999年第4期9卷 21-28页

作者： ZHANG Yu\|feng,\ BAI Zhi\|ming,\ ZHANG Fu\|yuan department of Basic sciences,{2. agricultural university, taigu, {2. 030801,People′s Republic of China

The nutritive value of pleurotus ostreatus growing in vinegar waste culture materials was evaluated by means of fuzzy comprehensive assessment,In the evaluation, the nutritive composition of the daily necessary of an ordinary adult was used as the standard nutritive structure and that of pleurotus ostreatus cultivated in cotton seed shell culture materials as a contrast. the results showed that the protein content of sporophore growing in vinegar waste culture materials(Sporophore V ) was lower than that of sporophore growing in cotton seed shell culture materials(Sporophore C ), but the nutritive structure of Sporophore V was more rational than that of Sporophore C. This leads to the conclusion that the nutritive value of two kinds of sporophore has no evident difference, and using vinegar waste as a substitute for cotton seed shell to cultivate pleurotus ostreatus does not affect the nutritive value of pleurotus ostreatus.

关键词： comprehensive assessment pleurotus ostreatus vinegar waste mutritive value

Arbuscular mycorrhizal for-mation of crucifer leaf mus-tard induced by flavonoids apigenin and daidzein

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Chinese science Bulletin 2004年第12期49卷 1254-1261页

作者： DONG Changjin1,2.& ZHAO Bin1 1. State Key Laboratory of agricultural Microbiology, Huazhong Agri- cultural university, Wuhan 430070, China 2. {2. of Biology, Hubei Normal university, Huangshi 435002. China 1. State Key Laboratory of agricultural Microbiology Huazhong Agricultural University 430070 Wuhan China 2. department of Biology Hubei Normal University 435002 Huangshi China

Flavonoids from legume root secretion may probably act as signal molecules for expression of Rhizobial “nod” nodulation genes and AM fungal symbiotic gene. Leaf mustard is a non-mycorrhizal plant; it does not contain fla- vonoids and other signal molecules. AM fungi could not in- fect the roots of leaf mustard and form a symbiont in nature, when it was treated with flavonoids (apigenin or daidzein). The results of trypan blue staining showed that two kinds of AM fungi (G. intraradices and G. mosseae) successfully in- fected the roots of non-mycorrhizal plant leaf mustard. AM fungi grew towards and colonized the roots of leaf mustard, producing young spores and completing the course of life. AM fungi are the only one kind of fungi with ALP activity. The result of ALP staining has also proved that AM fungi infected successfully the roots of leaf mustard. AM fungi (G. intraradices and G. mosseae) that existed in the roots of non-mycorrhizal plant leaf mustard were probed by nested PCR and special molecular probes. The above-mentioned proof chains have fully proved that flavonoids induced AM fungi (G. intraradices and G. mosseae) to infect non-my- corrhizal plant and establish symbiotic relationship.

关键词：非菌根植物免疫十字花科叶芥菜芹甙元大豆黄酮类黄酮灌木菌根真菌嵌套PCR trypan蓝色染色

Diffusion of Chloride Ions in soils: Ⅱ. Kinetic and Thermodynamic Characteristics

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Pedosphere 1997年第3期7卷 257-262页

作者： XU MINGGANG ZHANG YIPING and LIU WEINING (department of soil {2. and Agrochemistry, Northwestern agricultural university, Yangling, Shaanxi 712.00 China) departmentofsoil{2.andAgrochemistry NorthwesternAgriculturalUniversityYanglingShaanxi712100(Chi

The amounts of chloride ions diffused in four soils of different textures at the same water content under different temperature and at varied time were measured by the diffusion cell method using 36Cl-labelled CaCl2.solution. Five kinetic models were used to fit the dynamic process of the diffusion of chloride ions in the soils. It was found that Elovich equation or power function equation was the best model to describe the process. The pseudothermodynamic parameters, i. e. the net reaction energyl the activation entropy,activation enthalpy and activation free energy of the diffusion, were derived from the absolute reaction-rate theory. The results showed that these parameters decreased in the order of loessal soil > black in soil >lou soil > yellow cinnamon soil, which indicated that the force and the heat-energy barrier to be overcome for diffusion decreased, the diffusion rate increased and the disorder of the soil-solution-ion system due to diffusion decreased successively with the texture becoming heavier in the four soils.

关键词： activation enthalpy activation entropy chloride ion diffusion kinetics

Research on the method for retrieving soil moisture using thermal inertia model

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science China Earth sciences 2006年第5期49卷 539-545页

作者： LIU Zhenhua1 & ZHAO Yingshi2.1. Information College, South China agricultural university, Guangzhou 510642. China 2. Graduate university of Chinese Academy of sciences, Beijing 100049, China 1. Information College South China Agricultural University Guangzhou 510642 China 2. Graduate university of Chinese Academy of sciences Beijing 100049 China

In order to improve accuracy of soil moisture inversion using remote sensing, a new thermal inertia model is proposed in this paper. The improved model needs only surface maximum temperature as the temperature parameter input instead of input of the surface temperature difference, as well as the surface sensible and latent fluxes are introduced into boundary conditions of thermal conductivity equation. Furthermore, surface soil conductive heat transfer equation of two-layer model is used to solve the soil thermal inertia so that the remote sensing thermal inertia method can be ap- plied to regions with better-covered vegetation, but usually only for the bare areas or worse vegetation covered areas. The model has been tested at several locations in the area of west Inner Mongolia. Comparing the simulation of the new model with the measurements obtained by apparent thermal inertia and by field test, the result shows that the inertia thermal model can be used to estimate soil moisture in more reasonable accuracy.

关键词： thermal model, thermal conductivity equation, soil initial, sensible flux, latent flux, two-layer model.

Acidification of soils in Mount Lushan over the Last 35 Years

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Pedosphere 1992年第2期2卷 179-182页

作者： PAN GEN-XINGdepartment of soil {2. and agricultural Chemistry, Nanjing agricultural university, Nanjing 2.0014 (China)

INTRODUCTION soil acidification due to acid deposition has been one of the major environmental prob-lems concerned by soil scientists and ecologists for the recent 2. years(van Breemen,1990).soil acidification with a marked pH decrease of forest soils within various time intervals hasbeen reported in Germany,Sweden,the Netherlands,Australia and the United

关键词： acid deposition Mount Lushan soil acidification soil chemistry

Molecular Weight of Cytoplasmic Malate Dehydrogenase,Mitochondrial Malate Dehydrogenase and Lactate Dehydrogenase of a Freshwater Catfish

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Biomedical and Environmental sciences 1994年第2期7卷 122-129页

作者： G. TRIPATHI(department of Entomology and agricultural Zoology, Institute of agricultural science, Banaras Hindu university, Varanasi-2.1005, India) department of Entomology and agricultural Zoology Banaras Hindu University Varanasi India.

The multiple molecular forms of cytoplasmic malate dehydrogenase (cMDH), mitochondrial malate dehydrogenase (mMDH ) and lactate dehydrogenase (LDH ) were studied in the liver and skeletal muscle of the freshwater catfish, Clarias batrachus. There were two electrophoretically distinguishable bands (AA andBB) of cMDH and mMDH which suggests that they are apparently encoded at two gene loci (A and B) in both the ***, the presence of a single band (LDH-1 ) of LDH in liver and double bands (LDH-1and LDH-2. in skeletal muscle in which LDH-2.was predominant reflects the differential expression of LDH genes in different metabolic tissues to meet the requirement of energy production. The AA isoform (74 kd) of liver cMDH was smaller than those of the AA form (110 kd) of skeletal muscle. In contrast, the BB isoform of liver (42.kd) and skeletal muscle (54 kd) were more or less similar in size. Unlike the case of cMDH, the molecular weight of AA isoform (115 kd) of liver mMDH was higher than those of the AA form (87kd) of skeletal muscle. Whereas the molecular weight of BB isoform (58 kd) of liver was in proximity to the weight of BB form (44 kd) of skeletal muscle mMDH. The size of AA isoform (74 kd) of liver cMDH was smaller, while the AA isoform (110 kd) of skeletal muscle was larger as compared to AA form of mMDH in the liver (115 kd) and skeletal muscle (87 kd). But the size of BB isoform of both the isozymes was almost equal in these metabolic tissues. The molecular weight of liver LDH-1 (96 kd) was close to the weight of LDH-1 (82.kd) in skeletal muscle. The molecular weight of skeletal muscle LDH-2.was deduced as 37 kd which is much more lower than the weight of LDH-1 in liver and skeletal muscle. The smaller size of LDH-2.in skeletal muscle may be of a physiological significance in this anaerobic tissue

关键词： Wilson gene Molecular Weight of Cytoplasmic Malate Dehydrogenase,Mitochondrial Malate Dehydrogenase and Lactate Dehydrogenase of a Freshwater Catfish LDH

SORPTION AND TRANSFORMATIONS OF ARSENITE AND ARSENATE IN soilS AND THEIR RELATION TO RICE GROWTH

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浙江大学学报(农业与生命科学版) 1988年第3期 105-112页

作者： Xie Zhengmiao( department of soil {2. and agricultural Chemistry,Zhejiang agricultural university,Hangzhou,China)

In the present paper,a series of laboratory,pot and field experiments was made to study the sorption and transformation of arsenite As(Ⅲ)and arsenate As(Ⅴboth in soils derived from 14 different parent materials and in various soil components as well as their relations between the sorption and transformation and rice growth,to elucidate the mechanisms of soil chemistry involved in the sorption and transformation of As(Ⅲ)and As(Ⅴ)by soils and soil *** comprehensive studies have provided some effective measures of protecting and reversing arsenic pollution in the soil *** results obtained are summarised as follows

关键词： arsenic sorptiort transformation pollution Oryza saliva L, paddy soil soil condition microorganism oxidation groundwater self-purifieation