共查询到19条相似文献,搜索用时 203 毫秒
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使用浓度为100mg/kg、150mg/kg、200mg/kg的赤霉素溶液对辣椒进行涂膜处理,室温下装袋贮藏,研究赤霉素对辣椒的保鲜效果.结果表明,赤霉素处理能延缓辣椒果实失重和腐烂,保持辣椒果实的有机酸、叶绿素、VC和可溶性固形物,对辣椒有较好的保鲜效果.其中,浓度为150mg/kg的赤霉素溶液涂膜处理辣椒果实保鲜效果好. 相似文献
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利用浓度为1.0%、1.5%、2.0%的壳聚糖溶液对辣椒果实进行涂膜处理,常温袋装贮藏,定期测定其理化指标,研究壳聚糖对辣椒果实的保鲜效果。结果表明,壳聚糖溶液涂膜处理能降低辣椒红果率、失重率、腐烂指数,减少可溶性固形物、VC的损失,能够保持辣椒果实贮藏品质,其中浓度为1.5%的壳聚糖溶液涂膜处理效果较好。 相似文献
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水杨酸对番茄保鲜效果的影响 总被引:1,自引:0,他引:1
以变色期番茄为材料,分别采用浓度为0.1g/L、0.5g/L、1.0g/L的水杨酸溶液浸泡20min,在室温下贮藏33d,研究不同浓度水杨酸溶液涂膜处理对番茄果实的保鲜效果。结果表明,水杨酸处理能推迟番茄果实呼吸跃变时呼吸高峰的出现时间,降低呼吸强度峰值;对保持果实硬度、可溶性固形物、维生素C、可滴定酸有较好作用;能减少水分蒸发,降低果实失重率。使用浓度为0.5g/L的水杨酸溶液对番茄果实进行涂膜处理有较好的保鲜效果。 相似文献
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海藻酸钠和溶菌酶复合涂膜对马陆葡萄贮藏的保鲜效果 总被引:7,自引:0,他引:7
以海藻酸钠和溶菌酶为保鲜剂对马陆葡萄进行复合涂膜保鲜,研究不同浓度的海藻酸钠溶液对马陆葡萄贮藏保鲜效果的影响,分析比较各处理组对葡萄果实的感官品质、腐烂指数、质量损失率、硬度、呼吸强度、VC含量、可溶性固形物含量以及超氧化物歧化酶(superoxide dismutase,SOD)酶活性等生理生化指标的变化。结果表明:1%海藻酸钠和0.1%溶菌酶处理后的马陆葡萄,感官效果最好,在(4±1)℃条件贮藏25d后,果实的腐烂指数为0.17,质量损失率仅为9.34%,VC含量为3.2mg/100g,可溶性固形物含量为12.1%,呼吸强度显著低于其他处理组,保鲜效果最佳。 相似文献
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以油桃为试材,用0.5%、1.0%、1.5%的壳聚糖溶液涂膜处理Irain,定期测定油桃果实的理化指标,研究不同浓度壳聚糖溶液涂膜处理对油桃果实保鲜效果的影响。结果表明,壳聚糖涂膜处理有利于油桃保鲜,能抑制油桃果实失重率、腐烂指数及呼吸强度的上升,延缓油桃果实硬度、含糖量、VC含量、可滴定酸含量等的下降,其中浓度为1.0%的壳聚糖溶液涂膜处理对油桃果实的保鲜效果好。 相似文献
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以鲜辣椒为试材,用浓度0.4%、0.6%、0.8%的植酸溶液浸泡30s,取出晾干,室温下袋装贮藏,研究植酸对辣椒的保鲜效果。结果表明,经过植酸涂膜处理,能降低辣椒的失重率、红果率、腐烂率,减缓辣椒VC和可溶性固形物的损失,具有良好地保鲜效果。其中浓度为0.6%的植酸溶液涂膜处理辣椒保鲜效果较好,室温下贮藏可延长辣椒的货架期。 相似文献
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研究了氯化钙、海藻酸钠两种保脆剂对鲜红辣椒脆度与色泽的影响,同时探讨了经保脆处理泡红辣椒脆度与色泽在腌制贮藏过程中的变化,且在腌制结束后,对成品泡红辣椒进行了感官品质分析。研究结果表明,氯化钙与海藻酸钠两种保脆剂对红辣椒均具有较好的保脆作用;但对于色泽而言,氯化钙对腌制红辣椒色泽有损害作用,海藻酸钠对色泽有一定的保护作用;经正交实验得出,0.4%氯化钙与0.3%海藻酸钠复配处理,所得泡红辣椒的脆度与色泽最优。在腌制贮藏过程中,单一或复配处理对样品脆度均具有较好的保持作用,其中复配组脆度保持最好;而对于色泽而言,单一氯化钙处理使色泽损失较大,单一海藻酸钠处理使色泽略有提高,复配组由于二者综合作用,色泽未有明显变化。感官分析得出各处理组分值均高于86,产品品质均可接受,其中复配组分值最高,产品品质最好。 相似文献
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为研究天然复合保鲜涂膜液对卤鸭脖品质的影响,首先以菌落总数、挥发性盐基氮(TVB-N)、pH和硫代巴比妥酸值(TBARS)为检测指标,通过单因素实验分别考察海藻酸钠、乳酸链球菌素(Nisin)和纳他霉素对卤鸭脖品质的影响,再通过L9(34)正交试验法比较3种不同比例天然保鲜剂对卤鸭脖品质的影响,筛选最优组合的保鲜涂膜液。结果表明:3种天然保鲜剂的保鲜效果均优于空白组,其中Nisin显示出较强的抑菌效果,海藻酸钠形成的薄膜具备较好的抗氧化效果。当3种天然保鲜剂浓度配比为海藻酸钠1.0 g/100 mL、Nisin 0.9 g/100 mL、纳他霉素0.18 g/100 mL时,涂膜液对卤鸭脖品质的保鲜作用最佳,涂膜后4 ℃冷藏第15 d菌落总数、TVB-N、pH、TBARS和色差值分别为(5.37±0.08)lg CFU/g、(20.86±0.79) mg/100 g、(5.85±0.06)、(2.68±0.08) mg/kg、(1.51±0.07),均显著优于对照组(p<0.05),能够有效延长卤鸭脖冷藏的货架期。 相似文献
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Hussein F. Hassan 《International Journal of Food Properties》2013,16(6):1319-1335
Alginate-based simulated particles with spores of heat resistant microorganisms distributed in them are used in the biological validation studies, and the process lethality is usually calculated using initial and final counts. Such particles should be hard enough to save their integrity till the end of the thermal process. Also, they should not adhere to each other inside the can or to the can's inner wall. In this study, a response surface methodology was used to determine the optimum conditions that give maximum hardness and minimum adhesiveness of meat and carrot alginate fabricated particles. Sodium alginate concentration (1.5–6.5%), calcium chloride concentration (1.0–3.0%), and immersion time in the calcium chloride solution (4–44 h) were employed as factors at five levels, and the instrumental textural properties were assessed using the texture profile analysis. For each response (hardness and adhesiveness), a second-order polynomial model was developed using multiple linear regression analysis. Hardness of the fabricated particles was found to significantly increase (p < 0.05) with increasing sodium alginate concentration and immersion time in the calcium chloride solution, while calcium chloride concentration had no significant effect. On the other hand, adhesiveness (in absolute values) of the reconstituted particles increased significantly (p < 0.05) with increasing sodium alginate while the other two parameters had no significant effect. Applying the desirability function method, optimum conditions were found to be sodium alginate concentration of 4.7%, calcium chloride concentration of 2.6%, and immersion time of 32.0 and 30.8 h for carrot alginate and meat alginate fabricated particles, respectively. Fabricated particles using the optimum conditions did not show any variability in hardness values, unlike real food particles, when subjected to thermal processing. This investigation could help food processors using continuous agitation processing to fabricate firm and thermally stable reconstituted particles to be used in the biological validation studies. 相似文献
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S. G. Semënov E. E. Braudo Yu. F. Yaroshenko G. G. Zharikova V. B. Tolstoguzov 《Molecular nutrition & food research》1982,26(1):21-29
The effect of concentrations of acidic polysaccharide and calcium ions on the kinetic stability, viscosity and dispersity of protein-containing O/W emulsions is studied. Variation of kinetic stability of the emulsions studied is independent of dispersion composition. In a wide range of calcium acetate concentrations a correlation is observed between kinetic stability and viscosity of emulsions at sodium alginate concentration in the dispersion medium ≤ 0.3%. The transition zone between liquid solution and gel is widened in the presence of sodium caseinate. Maximum kinetic stability is reached at calcium acetate: sodium alginate concentrations of 1.0-1.2 and ~ 6.0, corresponding to optimum conditions for formation of homogeneous crosslinked structures of calcium alginate and calcium caseinate. 相似文献
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目的 探究复配生物涂膜保鲜液对冷藏南美白对虾的保鲜效果.方法 以新鲜南美白对虾为原料,通过单因素实验考察壳聚糖、海藻酸钠、明胶及乳酸链球菌素(Nisin)对冷藏南美白对虾货架期的作用.在此基础上优化壳聚糖、海藻酸钠及Nisin所组成的复配涂膜保鲜液的最适配比.结果 壳聚糖6 g/L、海藻酸钠8 g/L、Nisin 0.... 相似文献
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以全红期的山东省乐陵小枣为实验材料,分别进行60Co-γ辐照处理、海藻酸钠涂膜处理及二者结合处理后,与对照组同时于(2±0.5)℃冷库贮藏,并对低温贮藏过程中枣的失重率、总糖、还原糖、VC、可滴定酸含量及糖酸比的变化进行测定。结果表明:涂膜、辐照、涂膜+辐照处理均能有效减少水分散失,延缓VC和可滴定酸的下降,抑制糖酸比的上升,涂膜+辐照处理能保持较高的总糖、还原糖含量。其中,60Co-γ辐照+海藻酸钠涂膜处理于(2±0.5)℃冷库贮藏保鲜效果显著优于其他实验处理组,有助于提高乐陵小枣采后的低温贮藏品质。 相似文献