采收成熟度对台农芒果贮藏品质的影响

研究了60%和80%2种采收成熟度对不同后熟条件下(自然成熟、促进成熟和抑制成熟)台农芒果贮藏品质的影响。结果表明:与对照(自然成熟)相比,使用乙烯利处理台农芒果果实,加速了2种成熟度果实的成熟进程,而使用热处理结合乙烯吸收剂处理则具有明显的延缓病害发生和果实软化,抑制可溶性糖积累、有机酸和Vc降解的作用。在同一种后熟条件下(自然成熟、促进成熟和抑制成熟的任何一种),60%成熟度的果实其品质变化慢于80%成熟度的果实,但其风味品质却差于80%成熟度的果实。     

气调处理对茭白贮藏品质的影响

目的:明确气调贮藏对茭白的保鲜效果。方法:以常压冷藏为对照,在0℃和相对湿度为85%～90%的贮藏条件下,比较4种不同比例气体组分(CA1:2%O₂+7%CO₂+91%N₂,CA2:5%O₂+10%CO₂+85%N₂,CA3:5%O₂+7%CO₂+88%N₂,CA4:2%O₂+10%CO₂+88%N₂)对茭白感官品质、质构(硬度、咀嚼性、剪切力)、色泽(L^*、W_H值)、蛋白质、木质素和纤维素、苯丙氨酸解氨酶(PAL)和多酚氧化酶(PPO)活性的影响。结果:气调处理可以显著延缓茭白感官品质、L^*值、W_H值的下降及可溶性蛋白质的消耗(P<0.05),气调处理中CA2的保鲜效果最好。贮藏90 d, CA2处理茭白PAL、PPO活性显著低于对...     

乙烯催熟对采后果实贮藏品质的影响

乙烯是一种植物催熟激素,目前已经被广泛应用于采后果实的催熟。本文综述了乙烯对呼吸跃变型果实和非跃变型果实贮藏品质的影响。采后乙烯处理能够促进两种呼吸类型果实的褪绿转黄,改善果实色泽,并且能够引起两类果实硬度的下降,促进果实软化。乙烯处理能够促进跃变型果实贮藏过程中风味提升、香气改善、抗氧化能力提高,然而,乙烯对于非跃变型果实的这些品质并无显著影响。因此,对于在生产上应用乙烯催熟非跃变型果实,应在其食用品质达到商业要求之后方可采收。      

气调保鲜对采后柠檬贮藏品质的影响

以采后\     

气调、臭氧及1-MCP处理对佛手瓜贮藏品质的影响

为探讨保鲜方式对佛手瓜采后品质变化的影响,以绿皮无刺佛手瓜为试材,在温度(9±1)℃、湿度90%~95%的贮藏条件下,分别采用气调贮藏(5%O2+5%CO2+90%N2)、臭氧(5mg/L)和1-MCP(900nL/L)3种保鲜方式进行佛手瓜贮藏试验,测定和分析贮藏过程中佛手瓜品质和生理指标的变化。结果表明:与对照组相比,贮藏期间3个处理组果实品质相对较好;其中经1-MCP处理后的果实呼吸跃变高峰比其他组(第15天)推迟15d出现,其在贮藏末期呼吸强度最低为4.27mg CO2/(kg·h),叶绿素和Vc含量分别为0.27mg/kg和6.59mg/100g,为所有处理组中最高;过氧化氢酶(CAT)、过氧化物酶(POD)和超氧化物歧化酶(SOD)等指标均优于其他处理组和对照组。     

1-MCP处理对苦瓜果实贮藏品质和采后生理的影响

研究了1-甲基环丙烯（1-MCP）处理对苦瓜果实贮藏品质和采后生理的影响。苦瓜果实采后用0.5、1.0、1.5μL/L1-MCP处理12 h后,在20℃下贮藏。贮藏期间测定果实腐烂率、硬度、色差、可溶性固形物和可滴定酸含量、抗坏血酸含量、H2O2含量、超氧阴离子产生速率、果实的过氧化氢酶及过氧化物酶活性等指标的变化。结果表明:与对照组果实相比,1-MCP处理能有效延缓苦瓜果实硬度的下降,保持较高的抗坏血酸、可滴定酸和可溶性固形物含量,抑制果实中H2O2、O2-·含量的上升;且在整个贮藏期间,能够有效增加处理组果实过氧化物酶和过氧化氢酶的活性。另外,1-MCP还可以抑制果实的腐烂,但是过高浓度反而会增加果实的腐烂。研究认为,0.5μL/L 1-MCP处理可延缓采后苦瓜果实成熟衰老和贮藏品质下降,在20℃下延长贮藏时间达4 d以上。      

气调处理对骏枣贮藏品质的影响

研究低温条件下气调处理对新疆骏枣贮藏品质的影响,为解决骏枣贮藏保鲜提供理论依据。以骏枣为试材,将0℃预冷后的骏枣置于5种不同气体组分的PE袋中,通过分析-1℃贮藏期间骏枣呼吸强度、电导率、总糖等9项品质指标变化,筛选适宜的气调处理方法。结果表明,1%CO2+3%O2和1%CO2+5%O2处理可降低枣果实呼吸强度26.76%³2.94%,且1%CO2+5%O2处理推迟10 d出现呼吸峰值;降低乙烯释放峰值约22.56%,分别推迟10 d和20 d出现峰值;延缓相对电导率的上升,分别是对照组的85.77%和73.49%,有利于保护膜系统的完整性;减缓了总糖和总酸的下降,具有较好的贮藏效果。      

不同浓度的1-甲基环丙烯处理对香蕉果实 贮藏品质的影响

以香蕉果实（Cv. ‘Baxi’）为研究材料,研究不同浓度的1-甲mc基环丙烯(1-methylcyclopropene, 1-MCP)处理（0、0.5、1.0和2.0 μL/L）对香蕉果实贮藏品质的影响。 方法 测定了病情指数、果皮色泽、果皮细胞膜透性、果实硬度、可溶性固形物（TSS）含量、可滴定酸（TA）含量以及维生素C（Vc）含量。结果 与对照相比,乙烯利处理加速了果实成熟与品质变化,而1-MCP处理大大抑制了病情指数的提高和果皮色泽的变化,抑制了果皮细胞膜透性的上升和果实硬度的下降,延缓了TSS、TA和Vc含量的变化,几种处理浓度中,0.5 μL/L的1-MCP处理浓度效果最显著。结论 0.5 μL/L的1-MCP处理能够有效抑制香蕉果实的成熟与软化,延长贮藏时间。     

不同包装薄膜对荔枝气调贮藏品质的影响研究

为研究不同包装对荔枝果实气调贮藏品质的影响,在果蔬气调保鲜贮运实验平台上,以\     

不同浓度1-PentCP处理对芒果常温贮藏生理品质的影响

研究了不同浓度（1、5、50μL/L）的环丙烯类乙烯效应抑制剂1-PentCP（1-pentylcyclopropene,1-戊基环丙烯）常温（20±2）℃熏蒸处理20h对芒果果实（Mangifera indica L.）贮藏生理和品质的影响。结果表明,1-PentCP熏蒸处理能明显抑制果实的呼吸强度并延迟呼吸高峰的出现时间,延缓果实硬度、可滴定酸含量的下降和MDA（丙二醛）、SSC（可溶性固形物）含量的上升,并降低POD（过氧化物酶）、PPO（多酚氧化酶）酶的活性。说明1-PentCP处理能有效延缓芒果的后熟和衰老,抑制芒果贮藏期间品质的下降,其中以50μL/L1-PentCP的效果较佳。      

Surface treatments and coatings to maintain fresh‐cut mango quality in storage

BACKGROUND: Edible coatings may extend fresh‐cut fruit storage by preventing moisture loss and decreasing gas exchange. This study evaluated the effect of an antibrowning dip (calcium ascorbate, citric acid and N‐acetyl‐L ‐cysteine), followed or not with carboxymethylcellulose (CMC) or carrageenan coatings on quality of fresh‐cut mangoes stored at 5 °C for up to 20 days. A fourth treatment, only used in one of four experiments, consisted of chitosan. Treatments were applied on ‘Tommy Atkins’, ‘Kent’ and ‘Keitt’ mangoes harvested from Homestead (FL), and on imported store‐bought mangoes. RESULTS: The antibrowning dips maintained the best visual quality during storage for all cultivars, as indicated by higher b*, hue and L*. The CMC coating maintained similar visual quality, but carrageenan or chitosan decreased L* and b*. The antibrowning dip containing calcium ascorbate reduced firmness loss on cut pieces of ‘Keitt’, ‘Kent’ and store‐bought mangoes. The antibrowning treatment maintained higher titratable acidity for ‘Kent’ and ‘Keitt’, resulting in lower sensory sweetness. CONCLUSION: This study with repeated experiments showed that calcium ascorbate with citric acid and N‐acetyl‐L ‐cysteine maintained cut mango slices attractiveness in storage by keeping light color in both varieties. The addition of a polysaccharide coating did not consistently improve quality. Published in 2010 by John Wiley & Sons, Ltd.     

气调贮藏对甜樱桃果实采后生理生化变化的影响

主要研究了甜樱桃品种\     

冰温气调贮藏对平谷大桃品质影响的实验研究

将冰温贮藏和气调贮藏相结合,开展了冰温气调贮藏对平谷大桃品质影响的实验研究。实验在冰温条件下从调节气体组分入手,研究不同气体指标对平谷大桃贮藏期间品质变化的影响。得出以下结论:冰温环境结合气调贮藏,能够更加有效地降低大桃的代谢作用。与-1.2℃普通冰温贮藏相比较,大桃在冰温结合氧气浓度为3%和5%环境下贮藏的品质要优于普通冰温贮藏,贮藏期间糖类和维生素C都保持较高的含量,并最后得出了平谷大桃保鲜的有效方法。      

氮气气调储藏启封前后小麦品质变化研究

研究了在温度为（30±2）℃、相对湿度在75%的条件下氮气气调启封前后小麦的加工品质变化,分析了小麦水分、蛋白质、湿面筋、降落数值、面筋吸水量、面团流变学特性等重要加工指标的变化规律。结果表明,氮气气调储藏60 d和启封后60 d的小麦粉蛋白质的数量和质量、面团流变学特性无显著变化。小麦初始阶段、气调储藏阶段和启封后的蛋白质、湿面筋（全麦粉）、面筋指数、面筋吸水量、湿面筋（小麦粉）、吸水率差异不显著。启封前小麦粉面团形成时间、面团稳定时间随时间逐渐增加,气调储藏阶段增速高于启封阶段的变化。小麦粉面团的拉伸能量值、拉伸阻力、拉伸比例随着启封时间延长逐渐增加,小麦从缺氧到富氧过程面团的筋力有所增强,面团从开始拉伸到拉断为止所需能量逐渐增大,但其延伸性变化不大。     

充氮气调对花生制油品质的影响研究

对不同温度、不同储藏方式下储藏花生仁提取油的品质进行对比。试验表明:随着温度升高和储藏时间延长,油的色泽变化不明显,酸值、过氧化值和羰基值上升趋势明显;与常规对照组比较,充氮98%气调组制油品质变化相对缓慢,充氮90%气调组效果不明显。在25℃以下储藏,各组试样的品质变化缓慢;在高温下储藏,充氮98%气调组在30℃下能延缓花生的酸败速度,但在35℃即使充氮效果亦不明显。因此,建议花生仁储藏温度不宜超过30℃,配以低温或气调效果更好。     

微环境气调对蓝果忍冬贮藏品质和抗氧化酶的影响

该文以蓝果忍冬品种蓝精灵为试材,研究微环境气调对蓝果忍冬在低温贮藏期间果实感官品质、生理指标、营养成分、抗氧化酶活性的影响.实验结果表明,与对照相比,mMA能够有效维持蓝果忍冬果实自身的感官品质和营养成分,到贮藏期末期(60 d)时,mMA处理后果实中的抗坏血酸、花色苷,黄酮、总酚含量分别为123.09 mg/10...     

Shelf-life extension of highbush blueberry using 1-methylcyclopropene stored under air and controlled atmosphere

The potential of 1-methylcyclopropene for controlling ripening in ‘Lateblue’ blueberry fruit was explored. After harvest, blueberry fruits were exposed to 1-MCP (0.3 and 0.6 μl l⁻¹). After treatment, samples were stored in air at 0 °C for 35 days and in a controlled atmosphere (3 kPa O₂ + 11 kPa CO₂) for 60 days. Quality parameters were monitored (weight loss, total soluble solids content, titratable acidity, firmness, anthocyanin content, phenolic content, total antioxidant capacity). Blueberries treated with 1-MCP showed a reduced weight loss during storage and a lower total soluble solid content compared to untreated fruit. High titratable acidity values were observed after controlled atmosphere storage, but no significant effect of 1-MCP on this parameter was observed. 1-MCP had no significant effects on anthocyanins, phenolics or antioxidant activities.     

充氮气调储粮技术研究与应用

充氮气调储粮作为一种经济有效的绿色储粮技术,在粮食储藏等多种领域越来越受到人们的关注。综述了充氮气调储粮系统和充氮气调技术在粮库安全储粮等方面的应用,包括该技术在储粮害虫防治、粮食微生物抑制、延缓粮食品质劣变等方面的研究应用,并分析了其在数字化粮库建设中存在的问题和对策,以期为充氮气调技术在数字化智能粮库建设中更广泛的应用提供参考。     

Influence of different concentrations of 1-methylcyclopropene on the quality of tomato harvested at different maturity stages

BACKGROUND: A wide range of 1‐methylcyclopropene (1‐MCP) concentrations as well as various treatment durations have been studied in tomatoes by different researchers. However, little is known about interaction of 1‐MCP doses and maturity stages of tomatoes. Therefore the effects of different concentrations of 1‐MCP on storage and postharvest quality of ‘Zorro’ tomatoes harvested at mature green or pink maturity stages were investigated in a 2‐year trial study. RESULTS: Higher concentrations of 1‐MCP delayed and/or inhibited all parameters related to fruit ripening, such as lycopene, chlorophyll, surface color, polygalacturonase (PG) activity and soluble solids content/titratable acidity (SSC/TA), and these effects were greater in tomatoes harvested at the mature green stages. Lower concentrations of 1‐MCP slightly reduced the loss in general quality features compared with untreated tomatoes. CONCLUSION: The results suggest that 1‐MCP, especially at higher doses, is effective for delaying ripening of mature green tomatoes. Mature green fruits treated with 1000 nL L^?1 1‐MCP were stored for 35 days without significant decreases in quality characteristics such as elasticity, surface color and SSC/TA with certain physiological processes (ethylene production, PG activity, lycopene synthesis). Copyright © 2011 Society of Chemical Industry