刘亚平,刘兴华.采后失水处理对葡萄电学特性的影响[J].农业机械学报,2012,43(9):143-149.
Liu Yaping,Liu Xinghua.Effect of Postharvest Dehydration on Dielectric Properties of Grape during Cold Storage[J].Transactions of the Chinese Society for Agricultural Machinery,2012,43(9):143-149.
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采后失水处理对葡萄电学特性的影响   [下载全文]
Effect of Postharvest Dehydration on Dielectric Properties of Grape during Cold Storage   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2012.09.027
中文关键词:  葡萄  保鲜  失水处理  电学特性  频率
基金项目:陕西省科技攻关项目(2007K02—05)
作者单位
刘亚平 西北农林科技大学
山西农业大学 
刘兴华 西北农林科技大学 
中文摘要:为研究采后失水处理对葡萄贮藏过程中电学特性的影响,运用LCR电子测量仪测定了冷藏条件下红地球葡萄在0.1kHz、1kHz、10kHz、100kHz和1MHz频率下的部分电学参数。结果表明,在同一贮藏时间,未失水处理和经失水处理的红地球葡萄复阻抗Z、电抗X、电感Lp和电阻Rp随着测试频率的增加逐渐减小,电纳B逐渐增加;损耗角正切值tanδ、相对介电常数ξ′和复阻抗相角θ在0.1~100kHz频率范围内随着频率增加逐渐减小,到1MHz时又有所增加。在0~45d贮藏期内,随着果实的衰老,采后失水处理使葡萄保持了较高的Z、Lp、X和Rp以及较低的ξ′和θ,对保持果实品质更为有效。
Liu Yaping  Liu Xinghua
Northwest A&F University;Shanxi Agricultural University;Northwest A&F University
Key Words:Grape  Preservation  Postharvest dehydration  Dielectric properties  Frequency
Abstract:With the aim to investigate the effect of postharvest dehydration on dielectric properties of grape during cold storage, the dielectric parameters of the Red Globe grape were measured at 0.1kHz,1kHz,10kHz,100kHz and 1MHz by using LCR electronic measure instrument, and the results were compared with those of un-dehydrated grape under the same condition. For the un-dehydrated and dehydrated grapes, both of them have the same trends at same storage day: the impedance, reactance, inductance and resistance were all gradually decreased while the susceptance increased with the increase of the frequency; and the loss tangent, dielectric constant and impendence phase angle firstly decreased with the frequency increasing from 0.1kHz to 100kHz, and then increased at 1MHz. Compared with the un-dehydrated grape, the dehydrated one has higher impedance, reactance, inductance, resistance and lower dielectric constant, impendence phase angle during 45 days storage. All the test results show that postharvest dehydration is a more effective way in keeping the quality of grape during cold storage. 

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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