共查询到18条相似文献，搜索用时 187 毫秒
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《农产品加工．学刊》2017,(12)
壳聚糖是广泛存在于自然界中的唯一碱性多糖,具有广谱抗菌性、良好成膜性、抗氧化活性和安全可食性等优点,可作为天然高效的保鲜材料,应用于果蔬保鲜领域。通过介绍壳聚糖的保鲜特性,综述了壳聚糖在5种热带水果贮藏保鲜中的应用研究进展,并对其应用前景和研究发展方向进行了展望,旨在为壳聚糖在热带水果贮藏保鲜中的研究和应用提供参考。 相似文献
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利用保鲜剂对鲜切苹果块进行涂膜处理,研究了涂膜保鲜对鲜切苹果块的保鲜效果.以硬度、失重率为主要指标,结合感官评定,研究了羧甲基纤维素钠、柠檬酸、氯化钙、山梨酸钾添加量对鲜切苹果保鲜效果的影响,并通过正交试验进行配方优化,得出可食性涂膜对鲜切苹果块品质影响的最佳工艺参数.结果表明,可食性复合膜的最佳工艺配方为:羧甲基纤维素钠3.0％,柠檬酸0.6％,氯化钙0.25％,山梨酸钾0.5％,该条件下涂膜处理能够获得表面光亮、无褐变、无斑点、无腐烂、清脆爽口的鲜切苹果块,在50 h内不发生褐变和变质,保持一定的硬度,无明显失重,色泽、口感良好.试验结果显示,可食性涂膜可以有效延长鲜切苹果块的保鲜时间,且能保持较好状态,并可用于其他水果的保鲜. 相似文献
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对海南绿橙低温贮藏的适贮温度、贮藏方法以及1-MCP处理对海南绿橙贮藏保鲜的效果进行了研究，比较了7种不同的保鲜处理方法对海南绿橙货架期的影响。结果表明，海南绿橙低温（0～8℃）贮藏适宜温度为5～6℃，采用BD-1热带水果涂膜保鲜剂及无纺布保鲜袋包装，贮藏效果最佳，贮藏期可达100天以上，商品率达100％。而1-MCP处理对海南绿橙保鲜效果不明显；货架期期间采用BD-1热带水果涂膜保鲜剂涂膜＋控湿袋＋无纺布保鲜袋处理，货架期可达15天。 相似文献
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应用一种新型的可食性涂膜材料阿拉伯树胶对番茄进行涂膜保鲜,能够延长果实的货架期并提高果实品质。将浓度为5%、10%、15%和20%的阿拉伯树胶水溶液分别涂布于绿熟期的番茄表面,然后将番茄在20℃、相对湿度为80%～90%的环境中贮藏20 d。结果表明,浓度为10%的阿拉伯树胶涂膜处理与对照相比,可很好地保持果实的质量、硬度、可滴定酸、可溶性固形物和抗坏血酸含量;果实未出现任何腐烂和风味劣变症状。感官评价结果表明,应用10%浓度的阿拉伯树胶涂膜,在贮藏期内能够保持番茄果实的原有风味品质和正常颜色。说明在20℃下10%的阿拉伯树胶作为一种可食性膜可以延缓番茄果实的后熟进程,货架期可延长至20 d。 相似文献
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果蔬可食性涂膜保鲜研究现状与展望 总被引：14，自引：1，他引：14
从可食性涂膜的种类、特性,影响其特性的因素及其在果蔬保鲜中的应用等方面对国内外近年来的研究进行了综述,并指出了现阶段存在的问题和今后发展的方向。 相似文献
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There is increasing public interest in development of edible natural biodegradable coatings to replace the currently used commercial synthetic waxes for maintaining postharvest quality of citrus fruit. We tested the efficacy of a newly developed polysaccharide-based edible bilayer coating comprising carboxymethyl cellulose (CMC) and chitosan in preserving postharvest quality of various citrus fruit, including ‘Or’ and ‘Mor’ mandarins, ‘Navel’ oranges, and ‘Star Ruby’ grapefruit after simulated storage and marketing. In all citrus species, it was found that the CMC/chitosan bilayer coating was equally effective as the commercial polyethylene wax in enhancing fruit gloss. Furthermore, the CMC/chitosan bilayer coating slightly increased fruit firmness, especially of oranges and grapefruit, but was mostly not effective in preventing post-storage weight loss. Both the CMC/chitosan bilayer coating and the commercial wax had no significant effects on juice total soluble solids and acidity levels, and had similar effects on gas permeability, as indicated by only slight increases in internal CO2 levels and in juice ethanol accumulation after storage. Sensory analyses revealed that neither the CMC/chitosan bilayer coating nor the commercial wax coating had any deleterious effects on flavor preference of ‘Navel’ orange and ‘Star Ruby’ grapefruit. However, application of the commercial wax, and moreover the CMC/chitosan bilayer coating, resulted in a gradual decrease in flavor acceptability of ‘Or’ and ‘Mor’ mandarins because of increased perception of off-flavors. Overall, we showed that the CMC/chitosan bilayer edible coating sufficiently enhanced fruit gloss, but was not effective in preventing postharvest weight loss. Furthermore, flavor quality was slightly impaired in mandarins but not in oranges and grapefruit. 相似文献
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Edible composite coatings based on hydroxypropyl methylcellulose (HPMC), beeswax (BW), and food preservatives with antifungal properties, were evaluated on cherry tomatoes during cold storage. Food preservatives selected from previous research work included sodium propionate (SP), potassium carbonate (PC), ammonium phosphate (APh) and ammonium carbonate (AC). Cherry tomatoes artificially inoculated with Botrytis cinerea were coated and stored up to 15 d at 5 °C followed by 7 d of shelf-life at 20 °C. All antifungal HPMC-BW coatings significantly reduced gray mold development on inoculated and cold-stored cherry tomatoes, the SP-based coating being the most effective. Analytical and sensory fruit quality was also evaluated after cold storage and shelf-life. The AC-based coating was the most effective to control weight loss and maintain the firmness of coated cherry tomatoes. Respiration rate, firmness, color, sensory flavor, off-flavor, and fruit appearance were not adversely affected by the application of the antifungal coatings. Overall, the application of HPMC-BW edible composite coatings containing AC could be a promising treatment to extend the postharvest life of cherry tomatoes. Further studies should focus on the modification of some physical characteristics of the coatings in order to enhance the general performance and provide higher peel gloss. 相似文献
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以火龙果皮、山竹壳、黑布林皮为试材,对其花青素进行提取,并就温度、pH值、食品添加剂(亚硝酸钠和抗坏血酸)、金属离子对其稳定性的影响进行分析。结果表明:在最佳提取条件下,山竹壳、火龙果、黑布林中花青素含量分别为:53.40、26.78、6.51 mg/g,山竹壳中花青素含量最高;花青素溶液应在弱酸弱碱的条件下保存;花青素具有一定的耐热性,当温度低于60℃时比较稳定;亚硝酸钠对花青素的影响显著,随着浓度的增加,花青素颜色变浅;抗酸血酸对花青素稳定性影响小,可忽略不计;pH对花青素稳定性影响明显,溶液pH值应维持在5~9,即弱酸弱碱状态;金属离子Mg~(2+)对山竹壳和黑布林皮有一定的护色增色作用,0.2 g/L低浓度Mg~(2+)对火龙果皮的影响不显著;Mn~(2+)、Zn~(2+)、Cu~(2+)使花青素颜色变浅,Na+、Ca~(2+)和Al3+与空白对照相比,有的差异显著,有的差异不显著,未见规律性变化。从废弃的果皮或壳中提取天然花青素具有广阔的前景。 相似文献
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Maria Vargas Amparo Chiralt Ana Albors Chelo González-Martínez 《Postharvest Biology and Technology》2009,51(2):263-271
Edible coatings based on high molecular weight chitosan, pure or combined with methylcellulose or oleic acid, were applied to fresh-cut carrots cv. Nantesa by simple immersion and by applying a vacuum pulse (5 kPa for 4 min). Water vapour resistance, colour, mechanical properties and respiration rates of non-coated and coated samples were determined. Coatings improved sample appearance, since they diminished the occurrence of the white blush during storage. When applied by simple immersion, they neither conferred significant barrier properties nor the preservation of the mechanical properties of fresh-cut carrot samples. In contrast, coating application with a vacuum pulse enhanced all the positive effects, since the resistance of water vapour transmission of the samples was significantly improved, and better preservation of the sample colour and mechanical response during cold storage was obtained. Differences in film composition did not significantly affect the coating behaviour, probably due to the variability induced by different factors when coatings were applied to the carrot surface. 相似文献
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Postharvest sweet cherry quality and safety maintenance by Aloe vera treatment: A new edible coating
《Postharvest Biology and Technology》2006,39(1):93-100
A novel edible coating based on Aloe vera gel, accordingly to our developed patent (SP Patent Filed P200302937), has been used as postharvest treatment to maintain sweet cherry quality and safety. During cold storage, uncoated fruit showed increases in respiration rate, rapid weight loss and colour changes, accelerated softening and ripening, stem browning and increased microbial populations, these processes being more intense during the shelf life periods. On the contrary, sweet cherry treated with A. vera gel significantly delayed the above parameters related to postharvest quality losses, and storability could be extended. The sensory analyses revealed beneficial effects in terms of delaying stem browning and dehydration, maintenance of fruit visual aspect without any detrimental effect on taste, aroma or flavours. As far as we aware, this is the first time A. vera gel is used as an edible coating in fruit, which would be an innovative and interesting means for commercial application and as alternative of the use of postharvest chemical treatments. 相似文献
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Recently harvested peaches and plums were coated with either Aloe vera or Aloe arborescens gels and allowed to ripen at 20 °C for six days. Both coatings significantly delayed ethylene production, the effect being higher in plum which had the highest ethylene production rates. Changes in quality parameters related to peach and plum postharvest ripening, such as colour changes, reduction of acidity and increasing in ripening index (total soluble solids/total acidity ratio), were significantly delayed in coated fruit. In addition, both coatings significantly reduced weight loss, especially the A. arborescens gel. Thus, A. arborescens gel could be even more effective than A. vera gel for use as an edible coating for preserving the quality of climacteric fruit. 相似文献