添加纳米粒子的塑料包装材料在杨梅保鲜中的作用   总被引：3，自引：0，他引：3  

张瑶  杨京平  杨莹跃  陆禄  张放 《农机化研究》2007,(3):111-114

纳米技术应用在杨梅保鲜包装上是一个新的尝试,它采用了交互性实验设计方案,将银纳米材料添加进塑料制成包装材料,可观测其保鲜效果.结果表明,纳米塑料包装材料和纳米奇冰石在提高杨梅好果率和延长货架期方面有正面效果;同时,在抑制VC分解方面具有一定的作用.  相似文献   

高压静电预处理技术对番茄保鲜的影响   总被引：16，自引：0，他引：16  

张全国  焦有宙  张泽星  黄伟  朱彦 《华中农业大学学报》2002,21(6):558-562

研究了高压静电预处理后的番茄在保鲜过程中的呼吸强度、抗压强度以及失重情况的变化规律。结果表明，利用电场强度为150kV/m的高压静电场预处理番茄45min后，可使自然条件下番茄的呼吸高峰推迟4d后出现，并发现高压静电预处理能有效地保持番茄较高的表面抗压强度和较低的失重率，延长番茄的贮藏保鲜时间。  相似文献   

杨树伐根嫁接亲和力研究   总被引：5，自引：0，他引：5  

吴丽娟  贾素苹  宋继琴  于凌霄 《山西林业科技》2012,41(2):25-26,36

以小美旱杨为砧木,选择了9个杨树品种作接穗进行伐根嫁接,研究了伐桩与接穗的亲和力。结果表明:以小美旱杨为伐桩,嫁接038杨,中林46杨,107杨,108杨,埃瑞达诺110杨,中林2001杨,中林2025杨和转基因杨的伐桩成活率均高于97.8%,第4年伐桩保存率均高于92.8%,可以满足林业生产的需要,表现出良好的亲和力。  相似文献   

Standing on the Shoulders of Others: Taking an Agricultural Bibliography Project into the 21st Century     

《Journal Of Agricultural & Food Information》2013,14(1):15-33

  相似文献   

Fungicidal activity of beta-thujaplicin analogues     

Baya M  Soulounganga P  Gelhaye E  Gérardin P 《Pest management science》2001,57(9):833-838

The fungicidal activity of analogues of beta-thujaplicin, a natural product responsible for the durability of heartwood of several cupressaceous trees, was investigated in vitro on the growth of different white and brown rot fungi involved in wood biodegradation, Coriolus versicolor, Phanerochaete chrysosporium, Poria placenta and Gloephyllum trabeum. The study shows that 2-hydroxycyclohepta-2,4,6-trienone (tropolone), easily prepared according to a literature procedure, possesses interesting fungicidal activity when compared to beta-thujaplicin, azaconazole, tebuconazole and copper oxine, which suggests this compound should be examined further as a potential biocide for wood preservation.  相似文献   

小麦白粉病纯化菌种保存方法   总被引：4，自引：2，他引：4       下载免费PDF全文

曹远银  于基成  刘秋  魏松红 《植物保护学报》2005,32(3):271-274

利用经初选确定的5种具有较好保鲜能力的配方,采用离体叶段滤纸保存法、离体叶段琼脂保存法和试管苗保存法对小麦白粉病菌纯化菌系保存效果进行了研究.结果表明,对小麦幼苗第一叶叶段保鲜效果最好的配方是沈保6号,当使用40～60μg/mL最适浓度时,第25天叶段绿色仍可达到90%以上.保存菌种的最适环境条件研究结果表明,在4℃冰箱中,以离体叶片沈保6号琼脂保存和离体叶沈保6号浸润滤纸保存效果最佳,在第40天叶片绿色仍分别达到78.0%和68.0%,孢子萌发率可达26.7%和26.8%.  相似文献   

中国牡丹切花保鲜研究进展     

周秀梅  李保印 《北方园艺》2007,(12):60-62

对近20年来中国牡丹切花保鲜方面的最新研究进行了综述,以期为正在和将要从事牡丹切花保鲜研究的人们提供参考.我国的牡丹切花保鲜研究的对象多为中原牡丹品种群的品种,研究问题主要涉及乙烯、水分、保鲜剂等方面,关于分子水平上牡丹切花保鲜机理的研究未见报道.牡丹切花保鲜方面还有不少问题亟待开展或进行深入研究.  相似文献   

香菇真空冷冻干燥工艺的研究   总被引：9，自引：0，他引：9  

姜延舟  孙宏波 《中国食用菌》1998,17(1):39-40

本文介绍了香菇等食用菌的最好保鲜技术——真空冷冻干燥技术的原理、加工工艺和加工时的注意事项。并通过冻干香菇和传统干燥香菇的理化指标的测定,进一步证实了冻干工艺的优越性。  相似文献   

Multiple use forestry and preservation of coniferous forests in Norway     

《Scandinavian Journal of Forest Research》2012,27(1-4):266-280

The concepts of Multiple‐use forestry and preservation of “virgin”; coniferous forests are elements of an ongoing debate in Norway, regarding aesthetical and biological consequences of current forest management practices. A study, based on the Contingent Valuation Method (CVM), was performed during the fall of 1990. Data were collected through in‐person interviews of 1204 persons above 15 years of age.

The main objectives of the study were to analyze: 1) Attitudes toward the present state of Norwegian forests, 2) Attitudes toward and maximum willingness to pay for changes in current forest management, 3) Preferences and maximum willingness to pay for preservation of “virgin”; coniferous forests, and 4) Attitudes toward society's right to impose restrictions on forest management on private forest land.

Based on responses to statements related to the forest area people usually visit, the study showed a low degree of conflict regarding the present state of Norwegian forests. A ranking of possible results of two alternative forest management strategies, i.e. 1) a more cautious forest management or 2) preservation of “virgin”; coniferous forests, gave the highest average scores to “Preservation of endangered plants and animals”; and “Preservation of “virgin”; forests for our descendants”;, both related to the second management strategy. The maximum willingness to pay for a more cautious forest management was 277 Norwegian kroner (NOK) per household and year, with a median value of NOK 50. 47% of the sample preferred the preservation alternative A specified by the governmental committee, Barskogutvalget, while 18% preferred alternative B and 9% preferred alternative C, corresponding to the governmental decision. 15% preferred a 0‐alternative, i.e. no further preservation of “virgin”; coniferous forests. Two possible sources of bias, related to the CVM, were tested.  相似文献   

Evaluation of ovum storage techniques for reproductive studies of fishes     

D. C. Heins  J. A. Baker 《Ecology of Freshwater Fish》1999,8(2):65-69

Abstract– We compared dry masses of mature oocytes and ripe eggs from Etheostoma lynceum and Etheostoma caeruleum that were stored in varying concentrations of either formalin or isopropyl alcohol. In comparison to 10% formalin, alcohol significantly reduced the weights of both mature oocytes and ripe eggs, with 25% isopropyl alcohol resulting in much smaller reductions than 50% isopropanol. Three percent formalin resulted in smaller decreases in the masses of oocytes and eggs than the alcohol treatments, and not all comparisons with 10% formalin were significantly different. We recommend fixing specimens and storing them and gametic cells removed from them in 10% formalin. In cases where specimens or eggs in alcohol must be used in addition to material in formalin, correction factors (to formalin standard) should be developed, but the correction should not be made uncritically due to the varying effects alcohol may have among samples.  相似文献