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Phototoxic effect of UVR on wild type, ebony and yellow mutants of Drosophila melanogaster: Life Span, fertility, courtship and biochemical aspects

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Science china(Life Sciences) 2008年第10期51卷 885-893页

作者： WANG ZhePeng1,2. LIU RuiFang2. WANG AnRu3, DU LiLi1 & DENG XueMei1 1 college of Animal Science and Technology, china Agricultural University, Beijing 100094, china 2.vocational and technologic college, inner mongolia agriculture University, baotou 014109, china 3 college of Veterinary Medicine, china Agricultural University, Beijing 100094, china 1. college of Animal Science and Technology China Agricultural University Beijing 100094 China 2. vocational and technologic {2. Inner Mongolia Agriculture University Baotou 014109 China 3. college of Veterinary Medicine China Agricultural University Beijing 100094 China

Melanin plays an important role in protecting organisms from ultraviolet radiation (UVR). Therefore, it is possible that differently colored strains can show different sensitivities to UVR. In the present work, life span, fertility and courtship behavior of wild type (w), ebony (e) and yellow (y) strains of Drosophila melanogaster were studied to evaluate their sensitivity to ultraviolet (UV). Because a range of photo- toxic effects of UVR are mediated through generation of free radicals, levels of free radicals, lipid per- oxide (malondialdehyde, MDA) and superoxide dismutase (SOD) activity of three strains were examined to indicate their antioxidant defending ability and oxidative status. It was shown that w always had the highest lifespan and fertility not only in the control but also in UV-exposed groups. Moreover, lifespan and fertility of e were significantly higher (P2. effect on the SOD activities. After pooling data from the control and UV-exposed groups, we found that w had a significantly (P0.05). MDA levels were increased in the UV dose-dependent manner (P=0.0495). In con- clusion, our results suggested that UVR can decrease life span and fertility of flies and do harm to courtship, which may be due to oxidative damage to flies tissues (e.g. central nervous system) induced by free radicals. w had the highest tolerance to UVR, which may be ascribed to its advantage of survival under the natural condition and at high level of SOD activity. Then differences of pigment between e and y in absorbing UV, shielding agai

关键词： ultraviolet radiation Drosophila melanogaste free radicals pigment

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An improved SIFT Algorithm for Feature Points matching of dairy cow images

An improved SIFT Algorithm for Feature Points matching of da...

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亚洲精细农业与计算机农业应用联合大会

作者： Lizhong Wang vocational and Technical college {2. mongolia Agricultural university Hohhot {2. mongolia china Shuoshi Ma college of Mechanical and Electrical Engineering {2. mongolia Agricultural university Hohhot {2. mongolia china Heru Xue Zhenjie Hou college of Computer and Information Engineering {2. mongolia Agricultural university Hohhot {2. mongolia china

The conformation is the main parameter in dairy cow appraisal;hence, it is necessary for the measuring and evaluating of dairy conformation to use machine vision technology in 3D reconstruction. The feature points detecting and matching are the pivotal steps in 3D reconstruction. The conventional SIFT feature points matching algorithm has shortcomings of too large search area and low efficiency, An improved SIFT feature points matching algorithm is proposed to reduce the search range from both row and column directions based on binocular vision principle. 2.7 times of in speed by the improved algorithm has been shown in the experiments compared with that of the conventional algorithm with the same matching precision.

关键词： diary cow conformation feature points detecting feature points matching SIFT algorithm

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Existing Problems in Energy Exploitation and Eco-environment Sustainable Development and Their Countermeasures in Northern Shaanxi

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Meteorological and Environmental Research 2011年第4期2卷 76-78页

作者： GUO Jun-quan1, YANG Zhi-guo2.1. Department of agriculture and Forestry Architecture, Yan’an vocational and Technical {2., Yan’an 716000, china 2. Yanan Municipal Environmental Protection Monitoring Station, Yan’an 716000, china

The exploitation of coal, petroleum and natural gas in northern Shaanxi not only promoted the rapid development of economy, but also brought about enormous pressure to fragile ecology and resulted to severe water pollution, water and soil loss, vegetation destruction and other ecological environmental problems, so many countermeasures were put forward according to these problems, such as greatly developing circular economy, conducting cleaner production in petroleum enterprises, continuously renewing mining technology and so on.

关键词： Ecological environment Sustainable development Water pollution Circular economy Northern Shaanxi china

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Molecular Simulation of the Complex of Konjac Glucomannan-Borate in Water

Molecular Simulation of the Complex of Konjac Glucomannan-Bo...

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经济发展方式转变与自主创新——第十二届中国科学技术协会年会

作者： Wenjie JIAN 1,2.Yuan ZENG 2.Jie PANG 2.(1.college of Food Science,Fujian agriculture and Forestry University,Fuzhou 350002.{2. 2.Department of Biological Technology,Xiamen Ocean vocational college,Xiamen 361012.Fujian,{2.)

The formation of Konjac Glucomannan-Borate complex in water solution has been investigated by experimental and molecular simulation *** energy,radical distribution function of borate anion (B(OH)4-),and mean square displacement of the complex were studied during the molecular *** results indicate that one type of helical complex can be formed based on the hydrogen bonds between borate anion and helical chain of *** hydrogen bond is formed by the interaction of borate anion and -OH groups on C (6) of mannose and *** has little effect on the helical conformation of the *** was proposed that the complex can form gel through the aggregation arrangement of helical chain.

关键词： Konjac glucomannan borax molecular docking molecular dynamic simulation complex

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CASE STUDY OF DIGITAL agriculture IN THE OUTSKIRTS OF BEIJING

CASE STUDY OF DIGITAL AGRICULTURE IN THE OUTSKIRTS OF BEIJIN...

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The 3rd International Symposium on Intelligent Information Technology in agriculture(ISIITA)

作者： Yang Zhang Tieying Xue Beijing vocational college of {2. Beijing 102.42.china

＜正＞This article focuses on digital agriculture case study in the districts of Mentougou and Tongzhou by analyzing the current situation and points out the necessity of some basic tasks.

关键词： Digital agriculture(DA) Remote Sensing(RS) Precise agriculture Precise Data Geographical Information System(GIS) Global Positioning System(GPS)

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Mineral Coated Fertilizer Effect on Nitrogen-Use Efficiency and Yield of Wheat

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Pedosphere 2005年第4期15卷 526-531页

作者： LI Jian-Yun HUA Quan-Xian TAN Jin-Fang ZHOU Jian-Min HOU Yan-Lin L Department of Soil Environmental Science Research Center for Eco-Environmental Science Chinese Academy of Sciences Beijing 100085 （China）. State Key Laboratory of Soil and Sustainable agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China） Graduate School of the Chinese Academy of Sciences Beijing 100039 （China） college of agriculture Henan Agricultural University Zhengzhou 450002 （China）

A field experiment with winter wheat （Triticum aestivurn L.） was conducted on a silt loam calcaric endorusti-ustic Cambosols derived from the Yellow River alluvial deposits in Henan, china, from 2.01 to 2.02.to evaluate N recovery and agronomic performance of different mineral coated fertilizers （MiCFs） compared to normal urea used in wheat cropping systems under field conditions. Five treatments, including CK （check, no N fertilizer）, urea and three different MiCFs at an equivalent N application rate were established in a randomized complete block design. N release from MiCFs in soil was more synchronous with the N requirement of wheat throughout the growth stages than that from urea, with grain yield of the MiCF treatments significantly higher （P 〈 0.05） than that of the treatment urea. Correspondingly, the N recovery rate was greater for all MiCFs compared to urea, increasing from 32.8% up to 50.1%. Due to its high recovery and low cost, use of the mineral coated N fertilizers was recommended instead of the polymer coated N fertilizers.

关键词： mineral coated fertilizer N recovery urea winter wheat

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RESEARCH ON THE CORRELATIONS BETWEEN THE STANDARDS OF TRAINING PEOPLE OF TALENT FOR AGRICULTRUAL INFORMATION DIGITIZATION AND THE STANDARDS OFTRAINING TALENTED COMPUTER MAJORS OF HIGHER vocational college IN{2.——The Design and Practice of Computer Cur

RESEARCH ON THE CORRELATIONS BETWEEN THE STANDARDS OF TRAINI...

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第四届智能化农业信息技术国际学术会议

作者： Tieying Xue Yang Zhang Beijing vocational college of {2. Post Code: 102.42.Beijing china

＜正＞The key of Chinese agricultural information digitization （AID） is to apply computers to rural *** a developing country of agriculture,a vast group of technically talented people are badly needed,who are welcomed by peasants and are willing to stay in country *** are the features of New Rural Area （NRA） ? That means information digitization enters villages,touches farmers’ life and is applied to agricultural ***, the quantity and quality of higher vocational education （HVE） for computers are pretty essential in Chinese agricultural information digitization process.

关键词： Agricultural information digitization(AID) New Rural Area(NRA) higher vocational education(HVE) agricultural vocational college(AVC) talent standards training curriculum computer case study

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小流域土壤养分流失机理与土地覆盖格局演变

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水土保持研究 2005年第6期12卷 218-221页

作者：胡婧丛伟闫锋张兴昌杨凌职业技术学院西北农林科技大学资源环境学院陕西杨陵712100

小流域土壤养分流失与土地利用格局演变关系的研究作为陆地-大气相互作用、全球变化等研究的主要基础内容,是一个正在形成的、具有综合性和交叉性的学科生长点。论述了该项研究的重要性、小流域土壤养分流失机理与土地覆盖格局演变的关... 详细信息

小流域土壤养分流失与土地利用格局演变关系的研究作为陆地-大气相互作用、全球变化等研究的主要基础内容,是一个正在形成的、具有综合性和交叉性的学科生长点。论述了该项研究的重要性、小流域土壤养分流失机理与土地覆盖格局演变的关系、小流域土壤养分流失模型和今后的研究展望,以期推动土壤环境科学的发展。

关键词：小流域土壤养分流失机理土地覆盖格局演变

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Study on the Hydration Shell of Single-Helical of Konjac Glucomannan

Study on the Hydration Shell of Single-Helical of Konjac Glu...

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经济发展方式转变与自主创新——第十二届中国科学技术协会年会

作者： Jie PANG 1,Wenjie JIAN 1,2.Minna YAO 1,Huimin LIN 1,Aijun FENG 1,Yuan ZENG 1 (1 college of Food Science,Fujian agriculture and Forestry University,Fuzhou 350002.{2. 2.Department of biological technology,Xiamen Ocean vocational college,Xiamen 361012.Fujian,{2.)

The local maxima of water density in the space near the single-helical of Konjac glucomannan,as well as the dominant conformation of the system was studied by molecular dynamics under the water *** results indicate that the hydration shell,potential energy,and its hydrogen bond network with water bridges of the left-handed single-helix conformation was favored compared to those of right-handed single-helix *** work suggests that the left-handed single-helix conformation was the dominant conformation of KGM in water environment.

关键词： Konjac Glucomannan single-helical structure hydration shell molecular dynamic simulation

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江西省余江县生态农业综合评价

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土壤学报 2004年第5期41卷 819-822页

作者：吴大付何园球河南职业技术师范学院农学系河南新乡453003 中国科学院南京土壤研究所南京210008

余江县位于江西省东北部武夷山区向鄱阳湖平原的过渡地段,东经116°41＇～117°09＇,北纬2.°04＇～2.°37＇,是我国中亚热带低丘岗地红壤的典型地区.据1989年土地资源普查结果,全县国土总面积92. km2.境内水、光、热资源丰富,多年均温1... 详细信息

余江县位于江西省东北部武夷山区向鄱阳湖平原的过渡地段,东经116°41＇～117°09＇,北纬2.°04＇～2.°37＇,是我国中亚热带低丘岗地红壤的典型地区.据1989年土地资源普查结果,全县国土总面积92. km2.境内水、光、热资源丰富,多年均温17.6℃,年均日照1 852.4 h,年降雨量1 766.0 mm,无霜期2.2.d,有利于农作物生长.生产经济条件较好,1998年全县耕地面积2. 400 hm2.人均耕地0.062.m2.人均纯收入达2.16元;耕地农机总动力2.94kW hm-2.耕地化肥施用量675.83kg hm-2.为促进生态农业的发展,特对该县农业50年的发展态势进行分析评价.

关键词：江西余江县生态农业综合评价

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