共查询到19条相似文献,搜索用时 687 毫秒
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我国果蔬保鲜技术设备的发展方向 总被引:1,自引:0,他引:1
本文通过分析了我国果蔬保鲜现状和国内外保鲜技术现状,由此提出适合我国国情的发展我国果蔬保鲜技术设备的几个对策,即发展气调库、塑料小包装、冷藏气调集装箱等保鲜技术设备及其相应措施。 相似文献
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天然橡胶中的非胶物质种类和含量影响橡胶的质量和应用性能。本文通过硫化性能、交联密度、耐臭氧老化 性能测试和热重分析研究丙酮溶物含量对天然橡胶臭氧老化性能的影响。结果表明,丙酮溶物可以改善天然橡胶的硫 化性能,提高其交联密度。随着丙酮溶物添加量的增加,天然橡胶的热稳定性、臭氧裂纹显现时间、拉伸强度保持率 逐渐提高并达到最大值。采用衰减全反射傅里叶红外光谱分析仪(ATR-FTIR)分析了天然橡胶臭氧老化前后分子结构 变化,可知橡胶在臭氧老化后出现了氧化官能团。 相似文献
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M. Stasse-Wolthuis 《Plant foods for human nutrition (Dordrecht, Netherlands)》1979,29(1-2):31-38
In two experiments with young healthy volunteers the effects of a high in take of dietary fibre on blood lipids and intestinal transit time were investigated. In the first experiment the effects were studied of a high-fibre diet, in which half of the dietary fibre was provided by vegetables and fruits and the rest came from bread and other cereal products. In the second trial the effects of dietary fibre derived from vegetables and fruits were compared with those of isolated citrus pectin and wheat bran. It is concluded that—at least in short-term controlled experiments—fibre-rich food-stuffs have only a small (vegetables and fruits) or no (bran) favourable effect on the level of serum cholesterol. However, in uncontrolled circumstances, a ‘natural’ high fibre diet may through its low fat and cholesterol content indirectly reduce the concentration of serum cholesterol. A high-fibre diet with vegetables and fruits as well as a diet with bran shorten the intestinal transit time and enhance faeces production. 相似文献
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就冷害与果蔬的线粒体、能荷水平及代谢过程三者之间的关系,结合目前国内外相关的研究进行综述,从果蔬冷害与能量的角度,探讨果蔬冷害与抗冷性机制。 相似文献
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适应海南入境台湾果蔬产业健康、快速、可持续发展的需要,系统开展了海南入境台湾果蔬危险性有害生物普查,并采用PRA评估模型对17种外来入侵危险性有害生物进行了风险评估。2009~2010年考察发现,海南入境台湾果蔬以芒果、西瓜、哈密瓜、辣椒、番茄、莲雾、番木瓜和番石榴为主,主要分布在文昌、琼海、三亚、乐东、东方、昌江、澄迈、海口等农场和瓜菜生产基地,并且各瓜菜品种种植面积因市场价格影响年份间波动较大;调查共查获海南入境台湾果蔬危险性有害生物68种,包括害虫32种,病原微生物16种,杂草20种,其中外来入侵危险性有害生物17种;大面积严重发生与危害危险性有害生物25种;桔小实蝇、螺旋粉虱、烟粉虱、西瓜细菌性果斑病在海南均属于高度危险有害生物。上述结果为进一步开展海南入境台湾果蔬危险性有害生物监测预警与防控提供了前期工作基础。 相似文献
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S. C. Achinewhu C. C. Ogbonna A. D. Hart 《Plant foods for human nutrition (Dordrecht, Netherlands)》1995,48(4):341-348
Thirty wild fruits, nuts, herbs, spices and leafy vegetables were characterized and their chemical composition determined. Some of them were not only used for food, but for medicine in minor aliments by the natives. Results of the proximate analysis showed that on dry weight basis, the crude protein content ranged from 4.6 to 22.1 percent for spices and herbs, 3.2 to 43.1 percent for fruits and nuts, and 15.9 to 35.7 percent for leafy vegetables. The fat (ether extract) ranged from 7.5 to 36.0 percent for spices and herbs, 1.8 to 72.6 percent for fruits and nuts and 10.6 to 22.6 percent for leafy vegetables. Total carbohydrate content ranged from 34.6 to 71.9 percent for spices and herbs, 11.3 to 76.1 percent for fruits and nuts, and 24.6 to 51.4 percent for leafy vegetables. The wild fruits, nuts and leafy vegetables are high in ascorbic acid (Vitamin C.) Ascorbic acid content ranged from 18 mg/100 g dry sample to 113 mg/100 g sample for fruits and nuts, and 23 mg/100 g to 232 mg/100 g sample for leafy vegetables. The levels for peroxide value and free fatty acids (as percent oleic acid) of the spices are generally low indicating good storage stability of these plant materials. The flavour imparting essential oils (as percent oleoresin) content of the spices/herbs were fairly high and ranged from 0.1 to 5.2 percent. 相似文献
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离子色谱法测定蔬菜水果中氯离子、亚硫酸盐、硫酸盐含量 总被引:2,自引:0,他引:2
确立离子色谱法同时检测蔬菜水果中氯离子、亚硫酸盐、硫酸盐含量的样品处理方法和检测条件。在2%甲醛溶液SO32-的稳定剂的作用下,样品用10 mmol/L氢氧化钠溶液提取后,用IonPacAS9-HC型色谱柱为分离柱和9 mmol/L的碳酸钠淋洗液为流动相,电导检测器进行分析。结果表明,Cl-、SO32-、SO42-在2~10μg/mL浓度范围内线性良好(其相关系数分别为0.9973、0.9999、0.9991),样品中Cl-、SO32-、SO42-的加标回收率分别为83.7%~99.2%、80.6%~98.4%、81.0%~100.4%,检出限分别为0.005、0.05、0.01 mg/kg。 相似文献
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