共查询到20条相似文献，搜索用时 109 毫秒
1.
《农产品加工．学刊》2017,(6)
以涪陵茎瘤芥为研究对象,研究了鲜切茎瘤芥护色保鲜工艺,通过热处理工艺及筛选不同质量分数复合保鲜液对鲜切茎瘤芥进行护色保鲜,研究其护色保鲜效果。结果表明,于40℃条件下热处理5min后,鲜切茎瘤芥贮藏5d内失质量率下降程度最低。最佳复合保鲜液配方为柠檬酸0.12%,抗坏血酸0.10%,海藻酸钠0.10%,壳聚糖1.0%,氯化钙1.0%;在此条件下,鲜切茎瘤芥贮藏5d内失质量率、褐变度、PPO活性虽呈上升趋势,但增长缓慢,有效延缓硬度、可溶性固形物和L值含量下降,能够控制鲜切茎瘤芥褐变的程度,使鲜切茎瘤芥得到有效的护色保鲜。 相似文献
2.
郑月 《农产品加工．学刊》2014,(22):4-6,9
以鲜切生菜为试验材料,研究电解水、次氯酸钠和紫外线照射方法对鲜切生菜贮藏中微生物的控制效果。结果表明,pH值12.5的电解水、质量分数为0.1 g/kg的次氯酸钠溶液、紫外线处理30 min均能显著控制鲜切产品菌落数。0.1 g/kg的次氯酸钠溶液可使鲜切生菜保藏6 d,仍具有商业价值。 相似文献
3.
《农产品加工．学刊》2016,(15)
以新鲜莲藕为试材,研究了鲜切莲藕的加工工艺及加工过程中杀菌护色的问题。结果表明,鲜切莲藕在p H值5~6条件下用50 mg/L的ClO_2浸泡液处理10 min,在0~4℃的温度下贮藏20 d,产品品质稳定,杀菌护色效果优于常用的护色剂。 相似文献
4.
不同清洗消毒方法对鲜切生菜贮藏过程中微生物影响 总被引：1，自引：0，他引：1
郑月 《农产品加工．学刊》2014,(11)
以鲜切生菜为试验材料,研究电解水、次氯酸钠和紫外线照射方法对鲜切生菜贮藏中微生物的控制效果.结果表明,pH值12.5的电解水、质量分数为0.1 g/kg的次氯酸钠溶液、紫外线处理30 min均能显著控制鲜切产品菌落数.0.1 g/kg的次氯酸钠溶液可使鲜切生菜保藏6d,仍具有商业价值. 相似文献
5.
以宣木瓜为原料制作果脯,研究了漂烫、护色、硬化、脱涩、脱盐、浸糖工艺对果脯品质的影响。结果表明,将宣木瓜用沸水烫漂2 min后,置于由柠檬酸质量分数0.4%,Na Cl质量分数2.5%和Ca Cl2质量分数1%组成的溶液中进行护色、硬化、脱涩处理,脱盐3 h后在质量分数0.1%柠檬酸和质量分数0.5%甘油下浸糖,能够获得气味、口感、组织状态俱佳的宣木瓜果脯。 相似文献
6.
《农产品加工．学刊》2021,(14)
以新鲜肉苁蓉为原料,研究不同护色剂对肉苁蓉罐头护色效果的影响。结果表明,柠檬酸、Na Cl、抗坏血酸、L-半胱氨酸4种护色剂对肉苁蓉的护色有显著的效果。其中,柠檬酸最佳护色质量分数为0.25%,氯化钠最佳护色质量分数为0.80%,抗坏血酸最佳护色质量分数为0.03%,L-半胱氨酸最佳护色质量分数为0.02%。 相似文献
7.
鲜切荸荠品质保持的研究 总被引：1，自引：0，他引：1
以鲜切荸荠为试材,通过微生物控制和组合护色进行品质保持研究,最终研制出鲜切荸荠复合保鲜剂配方(0.2%植酸+0.1%L-半胱氨酸+0.25%醋酸锌+1%双乙酸钠),用该保鲜剂处理的鲜切荸荠,在温度(6±0.5)℃下冷藏保存12d,细菌总数只有8.69×104cfu/g,颜色新鲜如初,品质保持良好。 相似文献
8.
9.
10.
以鲜切甘蓝为试材,用0.3%异VC+0.3%柠檬酸浸泡护色20 min,在1%柠檬酸+1%VC溶液中漂烫(65℃)1 min,然后分别在-20℃、干冰和-60℃温度下速冻后于-18℃或0℃条件下贮藏20 d,研究不同速冻与低温保鲜处理对鲜切甘蓝贮藏品质的影响。结果表明,经护色和漂烫后采用干冰速冻处理,于0℃下贮藏20 d,鲜切甘蓝仍能够较好地保持叶绿素、VC和还原糖等营养品质,抑制腐败微生物生长,具有良好的硬度、胶黏性、弹性、咀嚼性、回复性等质构特性,色泽正常,气味清香,其感官品质显著好于其他处理。 相似文献
11.
12.
为改善兰州高原夏菜娃娃菜鲜切后的贮藏品质,以兰州高原夏菜娃娃菜为试材,分别使用0.5 mmol/L水杨酸、0.1%溶菌酶和6 mg/L二氧化氯3种保鲜剂和蒸馏水浸泡鲜切娃娃菜,通过测定鲜切娃娃菜的色差值、失重率、叶绿素含量和过氧化物酶(POD)、多酚氧化酶(PPO)活性等指标,研究不同保鲜剂对鲜切娃娃菜贮藏品质及抗氧化活性的影响。结果表明:0.1%溶菌酶、0.5 mmol/L水杨酸和6 mg/L二氧化氯均可有效保持鲜切娃娃菜的感官品质,延缓营养物质的消耗,提高娃娃菜贮藏期间的抗氧化活性。从总体效果来看,0.1%溶菌酶处理效果最好,能够有效抑制贮藏期间鲜切娃娃菜叶绿素、抗坏血酸(VC)、总黄酮、总酚的消耗,使POD活性增加、PPO活性降低。 相似文献
13.
热处理对鲜切菠萝贮藏品质的影响 总被引：2，自引：0，他引：2
为探索热处理对鲜切菠萝保鲜的效果,分别研究了40℃,处理20min;45℃,处理15min;50℃,处理10min条件下,热水处理对鲜切菠萝在8℃贮藏时的主要生理和品质变化的影响。结果表明,与对照相比,热处理对延缓鲜切菠萝衰老和保持品质有明显作用;与40℃,处理20min和50℃,处理10min相比,采用45℃,处理15min能更好地抑制VC含量、过氧化物酶(POD)活性和过氧化氢酶(CAT)活性的下降,保持了组织细胞的完整性,延缓了鲜切菠萝营养品质的下降,提高了贮藏效果。 相似文献
14.
15.
研究了纳他霉素处理对鲜切白萝卜品质的影响。首先,将鲜切白萝卜在浓度分别为0.05、0.08、0.10 g/L的纳他霉素溶液中分别浸泡3 min和5 min,定期测定其霉菌及酵母菌总数,筛选出最适浸泡浓度及时间。其次,采用喷雾和浸泡两种方式处理鲜切白萝卜,并定期对其失重率、硬度、VC含量、可溶性固形物含量、过氧化物酶(POD)活性、霉菌及酵母菌总数进行测定。试验结果表明:鲜切白萝卜采用0.10 g/L的纳他霉素溶液浸泡3 min是最佳的处理方式,与对照(不做处理)组相比,该处理的白萝卜失重率降低了18.9%,VC含量、可溶性固形物含量和硬度分别提高了50%、14.28%和9.2%,并能够抑制霉菌及酵母菌的生长繁殖及POD活性。适宜的纳他霉素处理可以延缓白萝卜组织衰老,有利于保持鲜切白萝卜贮藏期间的品质。 相似文献
16.
超高压处理对鲜切山药片质量的影响 总被引：5，自引：0，他引：5
为研究适宜的鲜切山药片的保藏方法,采用超高压处理对鲜切山药片进行保鲜。将鲜切山药片分别采用0MPa、200MPa、400MPa和600MPa加压处理10min后,在4℃条件下贮藏9d,分析超高压处理对贮藏期间鲜切山药片中细菌总数、多酚氧化酶活性、褐变指数、可溶性固形物、总酸和维生素C含量的影响。结果表明：600MPa压力处理10min后,可抑制于褐变相关的多酚氧化酶,抑制微生物生长,产品在4℃条件下贮藏9d后,仍然可具有较好的理化指标,表明该法是一种较好的鲜切山药片的保藏方法。 相似文献
17.
《Postharvest Biology and Technology》2006,39(1):84-92
The effect of antioxidant type and content alone or in combination with edible coatings for fresh-cut apples was studied. Edible composite coatings were prepared from whey protein concentrate (WPC) and beeswax (BW). Ascorbic acid (AA) at 0.5% and 1% content, cysteine (Cys) at 0.1%, 0.3% and 0.5% content, and 4-hexylresorcinol (4-hexyl) at 0.005% and 0.02% were incorporated in the formulations as antioxidants. Apple pieces were coated with the emulsion coatings and weight loss, color (CIE L*, a*, b*, and browning index (BI)) and sensory evaluation were measured during storage. Results showed that incorporation of the antioxidant to the coating reduced browning compared to the use of the antioxidant alone. 4-Hexyl was the least effective at reducing browning, even when incorporated into the WPC-based coating. Increasing AA and Cys content decreased browning of coated samples. The most effective treatments were WPC–BW-based coatings with 1% AA or 0.5% Cys. Apple pieces treated with 0.3% and 0.1% Cys aqueous solutions showed a pinkish-red appearance, whereas this effect was not shown when similar levels of Cys were incorporated into the WPC–BW-based coating. Coating application did not reduces weight loss in fresh-cut apples, probably due to the high relative humidity of the product. A sensory panel was able to discriminate between samples coated with WPC–Cys and samples dipped in Cys aqueous solution, but not between samples coated with WPC–AA and samples dipped in AA aqueous solution. 相似文献
18.
The effects of different concentrations (0.1%, 0.3% and 0.5%, w/v) of lemongrass essential oil incorporated into an alginate-based [sodium alginate 1.29% (w/v), glycerol 1.16% (w/v) and sunflower oil 0.025% (w/v)] edible coating on the respiration rate, physico-chemical properties, and microbiological and sensory quality of fresh-cut pineapple during 16 days of storage (10 ± 1 °C, 65 ± 10% RH) were evaluated. Coated fresh-cut pineapple without lemongrass and uncoated fresh-cut pineapple were stored under the same conditions and served as the controls. The results show that yeast and mould counts and total plate counts of coated samples containing 0.3 and 0.5% (w/v) lemongrass were significantly (p < 0.05) lower than other samples. However, the incorporation of 0.5% (w/v) lemongrass in coating formulation significantly (p < 0.05) decreased the firmness and sensory scores (taste, texture and overall acceptability) of fresh-cut pineapples. Therefore, the results indicate that an alginate-based edible coating formulation incorporated with 0.3% (w/v) lemongrass has potential to extend the shelf-life and maintain quality of fresh-cut pineapple. 相似文献
19.
The problems that are usually associated with fresh-cut commodities are the rapid depletion of nutritional value and the presence of high microbial populations. Ozone is a strong oxidant that can elicit physiological, chemical and microbial changes in fresh produce. Therefore, fresh-cut papaya was treated with ozone (9.2 ± 0.2 μl/L) at 10, 20 and 30 min to investigate its effect on phytochemicals and microbial load. Following a 20 min ozone treatment, the total phenolic content of fresh-cut papaya increased by 10.3% while the ascorbic acid content decreased by 2.3% compared to that of untreated control fruit. Also, gaseous ozone reduced microbial counts being more effective on coliforms (0.39–1.12 log 10 CFU/g) than on mesophilic (0.22–0.33 log 10 CFU/g) bacteria. The results suggest that microbial populations on fresh-cut papaya can be reduced without depleting its major antioxidants except for ascorbic acid when subjected to 9.2 ± 0.2 μl/L gaseous ozone for 20 min. 相似文献