Simple Analysis of the Thermal Environment in Chongqing     

LU Jun  LIU Shu-li  CHEN Jing 《保鲜与加工》2005,(3):98-101

There are a series of city environmental problems especially in the mountain city along with the city fast development. In recent decade, many scholars have studied the urban heat island, the urban temperature, the urban wind field, the precipitation and the urban visibility etc. But the urban thermal environment has not been settled radically. All the measures have not been used in the practice. And the researches in thermal environment of the mountain cities are very few. So the authors consider Chongqing as the researching object. Chongqing is one of the typical mountain cities in the semi-tropical. Sequentially we find out the characteristic of the thermal environment in the mountain city. Further the authors seek for the measures to plan and build ecological city. They conclude that CFD can be used in the simulation of urban environment, and use the result of simulation in urban planning is possible. The thermal environment in the center of Chongqing needs to be improved.  相似文献   

转几丁质酶和β-1,3-葡聚糖酶双价基因小麦的获得和鉴定   总被引：20，自引：0，他引：20  

叶兴国  程红梅  徐惠君  杜丽璞  陆维忠  黄益洪 《作物学报》2005,31(5):583-586

利用农杆菌介导法将几丁质酶基因和β-1,3-葡聚糖酶双价基因导入小麦品种扬麦10号和Bobwhite,共得到了13株T0代转基因植株,2个小麦品种的转化效率分别为1.4%和1.0%.T1代植株赤霉病抗性鉴定结果表明,转基因植株对赤霉病具有一定抗性,小穗发病率4.76%～11.76%,低于抗病对照和感病对照.T1代植株分子检测结果表明,外源基因分离比例为2.33∶1,较低的分离比例可能与外源基因的丢失有关.  相似文献   

Color Image Compression Method Based on Incomplete Scanning Method     

ZHU Bing-lian  WANG Wen-tao  LU Ji  ZHANG Wen-ming 《保鲜与加工》2005,(12):69-72

In view of color image characteristic, the paper improves the zero algorithm in the application of concrete algorithm, draws a new algorithm-incomplete scanning method, which is applied to color image compression. The authorsconvert color image from the RGB space into luminance-chrominance YUV space, then compress the converted image to encode/decode. Theoretical analysis and simulation experiment indicate that the compression ratio and encoding/decoding speed are increased, at the sase time the quality of restored image is guaranteed.  相似文献   

Electrolytic Efficiency of Late Landfill Leachate Pretreated by Electrolytic Oxidation     

JIAO Bin-quan  LI Xiao-hong  LU Yi-yu  GE Qiang 《保鲜与加工》2006,(3):128-130

With trait of late landfill leachate treated hardly, it is an effective method of enhancing biodegradability of late landfill leachate that electrolytic oxidation pretreats late landfill leachate, and it is very necessary to calculate current efficiency. Varity of organic pollutants in the late landfill leachate is studied under the electrochemical action by some tests and current efficiency under different electrolytic condition is calculated. The results show that the most high current efficiency is 34.11% when the current density is 15 mA/cm^2 and electrolytic time is 6.5 h.  相似文献   

实时荧光PCR技术定量检测转基因大豆方法的研究   总被引：7，自引：0，他引：7  

吴影  宋丰顺  陆徐忠  赵伟  杨剑波  李莉 《作物学报》2007,33(10):1733-1737

以转基因大豆Roundup Ready为材料，通过特异性引物和探针，对转基因大豆中外源基因cp4-epsps进行了定量检测。研究发现Taqman荧光探针法和SYBR荧光染料法均可作为转基因大豆定量检测的方法，但前者比后者具更高的检测灵敏度和精确度，其检测阈值可降到0.05%，变异系数为0.09%~0.53%。在此基础上，建立和优化了Taqman探针实时荧光定量PCR检测技术体系，有助于提高转基因作物及产品的生物安全性定量检测的准确度和可靠性。  相似文献   

植物K+吸收转运的分子机制研究进展   总被引：3，自引：0，他引：3  

鲁黎明  杨铁钊 《棉花学报》2006,18(6):379-385

K 在植物的生命活动中发挥着十分重要的作用。植物对K 的吸收,可分为高亲和吸收与低亲和吸收两个组分。在分子水平上,高亲和吸收主要由KUP/HAK/KT及HKT家族的K 转运蛋白来承担;而Shaker、KCO等家族的K 通道蛋白,则主要在植物的低亲和吸收中发挥重要作用。在高等植物K 吸收转运的分子机制的研究中,KAT1及AKT1是两个最先克隆出来的K 通道基因。植物中最先克隆出来的高亲和K 转运体基因,是小麦的HKT1。在棉花的生长发育过程中,K 的作用十分关键。棉花的K 转运蛋白GhKT1在棉纤维的发育中至关重要。综述了高等植物K 吸收运转及调节的分子机制研究方面的最新进展,并对研究的前景进行了展望。  相似文献   

Application of Time-frequency Representations in Study on Heart Sound     

ZHU Bing-lian  LU Ji 《保鲜与加工》2006,(5):116-119

Heart sound is non-stationary signal, some of its important characteristics can be obtained by time - frequency analysis method. The criteria of different time-frequency representation concentricity of spectrogram, coverage, MSE and regularity of time envelope axe proposed, the performances of Short-time Fourier transform, Wigner - Ville distribution, continuous wavelet transform, and S transform in study on heart sound are compared based on these criteria , and concrete example of application is given.  相似文献   

大豆育成品种品质性状和农艺性状的相关性研究     

王茹芳卢思慧  曹金峰高广居 《华北农学报》2007,22(B08):131-134

应用灰色关联度分析方法,对适合我市的夏大豆育成品种进行分析,结果表明：各农艺性状与蛋白质含量的关联度由大到小依次是：产量〉生育日数〉百粒重〉单株荚数〉株高〉单株粒数〉脂肪含量〉始花（R1）-成熟（R8）日数〉主茎节数〉出苗-始花（R1）日数;对蛋白质含量影响最大的是产量,影响较大的是生育日数、百粒重、单株荚数。与脂肪含量的关联度由大到小依次是：始花（R1）-成熟（R8）日数〉株高〉生育日数〉主茎节数〉产量〉蛋白质含量〉单株荚数〉单株粒数〉百粒重〉出苗-始花（R1）日数;对脂肪含量影响最大的是始花（R3）-成熟（R8）,影响较大的是株高、生育日数、单株节数。  相似文献   

Theory of RBV-Competitive Advantage of the Stock Company     

SUN Zhi? yong  ZHANG Wei? guo  LU Yu? mei 《保鲜与加工》2003,(2):145-147

China's stock market enters a stage where the competition's rules as well as the competition's environment are changing continuously,Under such circumstances,to gain the competition advantages is of vital importarce to the existence and development of China's stock companies themselves. As a result, the stock companies should have a thorough analysis of the RBV theory at present, and evaluate its applicability to China's stock companies, Then they should come up with some reformational measures,aiming at improving the competition advantages of domestic stock companies. There fore they are able to make measonable use of the company's resources and accomplish the organic unity combination of the company's valued resources and its strategic administration. These are the key measures used by stock companies to gain the competition cedvantges.  相似文献   

适用于水稻微粒体蛋白的双向电泳技术及苯达松抗性相关蛋白的初步分析     

王云生  陆徐忠  王智勇  宋丰顺  李莉  杨剑波 《作物学报》2007,33(8):1340-1345

针对不同来源的样品，建立相应的双向电泳(two-dimensional gel electrophoresis, 2-DE)技术是开展蛋白质组学研究的基础。以野生型水稻(O. sativa L.)农林8号(N8)及其苯达松敏感致死(bentazon sensitive lethal, bsl)突变体农林8号m (N8m)为材料，通过优化条件，建立了适合于水稻微粒体蛋白的双向电泳技术。并通过双向电泳图谱的比对，共找到15个差异蛋白点，分为供试材料间差异、苯达松处理前后差异和N8在苯达松处理后特异表达等3种类型。结合苯达松抗性比较及苯达松残留分析，推测材料间差异是因γ射线辐照引起基因结构变异，从而影响了基因的表达；苯达松处理前后差异与氧自由基清除酶系或系统获得抗性相关酶系有关；N8在苯达松处理后特异表达与苯达松代谢有关。  相似文献