多胺对甜瓜幼苗抗冷性的影响机理研究   总被引：10，自引：0，他引：10  

刘卫群  林秋萍 《华北农学报》1993,8(3):18-22

本文研究了外源多胺对在低温胁迫下甜瓜幼苗体内DNA、RNA、可溶性蛋白质、超氧物歧化酶(SOD)及细胞质膜透性的影响.结果表明,多胺处理的甜瓜幼苗在低温(2±1℃)下处理10h后,RNA和DNA含量明显增多,蛋白质的图谱发生显著变化,SOD活性增强,细胞膜的破损渗漏较少,尤以0.4mmol的腐胺处理最为显著.多胺与核酸的相互作用调节了植物体内的代谢过程,与膜的相互作用增强了机体的抗冷性.  相似文献   

Electro-circuit Design About the Data Acquisition and Wireless Transmission System Based on High-speed SCM     

YAO Peng  XIE Zhi-jiang  YU Zhong-yun 《保鲜与加工》2006,(4):9-11

Considering the difficult of acquiring and transmission the signal from the moving equipment, a new fault diagnosis monitoring system is presented. The system acquires the state signal from the moving equipment by data acquisition module that based in W77E58 high-speed SCM, and transmits the data fast by wireless mode. The signal data can be use for fault diagnosis and precise analysis. The system has the ability for acquiring abundance of data with a high speed, the ability for high accuracy data conversion, and has a function of programme controlling gain and programme controlling low-pass filtering. The successful application of this system on the vibration monitor about the material-transporting bogie in an iron works of a domestic steel enterprise proves the stability and credibility about the design project, also testifies its practical value and versatility.  相似文献   

Study on Modeling for Pretreatment and Cyclic Control Stream     

Peng Donglin Dai Zhengyuan Zheng Lianqin 《保鲜与加工》1997,(1):104-108

The characteristics of pretreatment and cyclic control stream are analysed:the form of cyclic embedded hardware circuit,the idea for designing the pretreatment program.The chart model of the system is established preliminarily.  相似文献   

Research and Practice on Separation of Errors by Numerical Fitting     

Peng Donglin Liu Chengkang Liu Chong 《保鲜与加工》1997,(6):53-57

  相似文献   

Research on Optimum System of Slag Making of ANYANG Iron & Steel CO.BF     

Wen Guangyuan Peng Henian 《保鲜与加工》1997,(6):30-35

  相似文献   

FINITE ELEMENT PREDICTION OF THE PERFORMANCE OF AN INSTRUCMENTED GEOTEXTILE-REINFORCED WALL     

Peng Shusheng 《保鲜与加工》1995,(3):85-95

  相似文献   

实用型荔枝虫害诊断专家系统设计方法研究 实用型荔枝虫害诊断专家系统设计方法研究     

苏伟强  唐昭琳  彭宏祥  刘业强顾林 《中国农学通报》2005,21(6):399-399

针对大型检索表为表示的专家知识体系，研究提出了一套可重用的、实用性强的系统设计方法，建立了荔枝虫害诊断专家系统（LDS）。经生产示范应用表明：实现了人机操作界面直观、明了，降低了客户端的专业要求，提高了系统的实用性。还对系统所构造的人机界面、知识存储结构设计和控制策略给出实践示例。  相似文献   

Synthetic Assessment of Power Transformer Condition Based on Matter-element Theory     

XlONG Hao  SUN Cai-xin  DU Peng  DAI Yao  WANG Qian 《保鲜与加工》2006,(10):24-28

Condition assessment on power transformer is an important approach to improve reliability of transformer and provide proper decision-making for condition-based maintenance. For long, static assessment method used in the past has already not adapted to the development of modem electricity transmission and distribution technology. So based on the deficiency of fuzzy synthetic assessment method, matter-element synthetic assessment method is introduced. The method can evaluate transformer condition not only in quality but also in quantity. Because each index weight can be given fairly and fast through improved analytic hierarchy process, which need not carry on consistency chec accuracy of assessment can be improved. Examples analysis has proved that assessment method of power transformer condition based on matter-element theory is rational and effective.  相似文献   

Automatic Fingerprint Classification by GA-Based Neural Network     

HUANG Xi yue  MA Xiao xiao  SHEN Zhi xi  WANG Peng  ZHOU Xin 《保鲜与加工》2001,(1):74-77

Fingerprint classification can provide an important indexing mechanism in a fingerprint database. An accurate and consistent classification can greatly reduce fingerprint matching time for large database. In the paper, by combining genetic algorithm and neural network is presented a fingerprint classification algorithm which is able to achieve an accurate classification. By inputting the global feature represented by directional image to three layer neural network trained by genetic algorithm, the fingerprints were classified into six categories: whorl, right loop, left loop, arch, double loop and undiscerning type successfully.  相似文献   

Application of Water Quality Standand Leuel Method in Eualuazing Status Quo of Heauy-Metals Pollution in Riuers     

Dai Dayu Xu Mingxi Peng Qingchu 《保鲜与加工》1993,(3):99-103

The status quo of heauy-metals pollution in water phase of course of Long-Tan hydropower statian was eualuated by water Quality Standand Level Method. With this special method,mone objectiue and definite results were obtained.  相似文献