[Objective] The aim was to study on temporal-spatial distribution model of cold chain logistics for vegetables. [Method] Broccoli was taken as an example. Detailedly, time-space distribution model of cold chain logist...[Objective] The aim was to study on temporal-spatial distribution model of cold chain logistics for vegetables. [Method] Broccoli was taken as an example. Detailedly, time-space distribution model of cold chain logistics for broccoli was proposed from standpoints of costs and benefits based on changes of time and space, and a comprehensive evaluation was made on timeliness, efficiency, risks, added- value of products and satisfaction of information in cold-chain logistics. [Result] The efficiency of cold chain logistics for vegetable can be greatly improved by temporal- spatial distribution model of cold chain logistics. [Conclusion] Costs and benefits of vegetables in temporal-apstial distribution could be evaluated by the model.展开更多
采用顶空固相微萃取-气相色谱-质谱（head space solid-phase microextraction and gas chromatography mass spectrometry,HS-SPME-GC-MS）联用并结合电子鼻技术检测线椒的挥发性成分,研究1-甲基环丙烯（1-methylcyclopropene,1-MCP）...采用顶空固相微萃取-气相色谱-质谱（head space solid-phase microextraction and gas chromatography mass spectrometry,HS-SPME-GC-MS）联用并结合电子鼻技术检测线椒的挥发性成分,研究1-甲基环丙烯（1-methylcyclopropene,1-MCP）处理对线椒在10℃贮藏过程中挥发性成分变化的影响。结果表明,HS-SPMEGC-MS方法共检测出52种挥发性成分,主要为醛类、醇类和酯类物质,1-MCP处理减缓了线椒醛类、酯类、酸类物质相对含量的降低,同时抑制了醇类、烃类以及其他类挥发性物质相对含量的增加,1-MCP处理可以保持线椒良好的挥发性物质成分变化,延缓其风味的改变;用电子鼻对线椒在10℃贮藏期间挥发性物质进行主成分分析、负荷加载分析及线性判别分析,结果均表明,1-MCP处理对线椒挥发性物质的影响主要在贮藏期第15~35天,10℃贮藏线椒在第15天的挥发性成分相对含量变化较大,是其新鲜度变化的拐点。展开更多
为明确冷藏时间对葡萄贮后货架期芳香物质的影响,以‘无核寒香蜜’葡萄为试材,运用顶空固相微萃取-气相色谱-质谱(head space solid-phase microextraction and gas chromatography mass spectrometry,HS-SPME-GCMS)联用技术检测冷藏15...为明确冷藏时间对葡萄贮后货架期芳香物质的影响,以‘无核寒香蜜’葡萄为试材,运用顶空固相微萃取-气相色谱-质谱(head space solid-phase microextraction and gas chromatography mass spectrometry,HS-SPME-GCMS)联用技术检测冷藏15、45 d出库后常温货架期间(0、3、6 d)挥发性成分的变化,并采用电子鼻对不同冷藏期(15、30、45、60 d)出库后常温货架的果实进行判别分析。结果表明,葡萄的挥发性成分主要由酯类、醛类和醇类组成,主要挥发性成分为乙酸乙酯、青叶醛、正己醇、叶醇、香茅醇。冷藏45 d后常温货架期间酯类和醇类物质的相对含量均低于冷藏15 d同期果实,醛类物质则较高。电子鼻结果表明,通过线性判别分析可以有效区分不同冷藏期的葡萄,贮后货架期间,除冷藏15 d出库后0、3 d货架重叠外,其余冷藏期货架期间均互不重叠,即随着贮后常温货架的延长,葡萄中挥发性成分变化较大,电子鼻区分效果越加明显;负荷加载分析分析得出,W1W(硫化氢、萜烯类)、W1S(芳香成分)、W2S(乙醇)传感器对挥发性气味的贡献较大,与HS-SPME-GC-MS分析相佐证。因此,HS-SPME-GC-MS结合电子鼻对葡萄冷藏时间及贮后货架期的芳香物质判别具有可行性。展开更多
基金Supported by Tianjin Science and Technology Development Project (060YFGNC1900)National Key Technology R&D Program in the 11th Five-year Plan of China(2012BAD38B01)~~
文摘[Objective] The aim was to study on temporal-spatial distribution model of cold chain logistics for vegetables. [Method] Broccoli was taken as an example. Detailedly, time-space distribution model of cold chain logistics for broccoli was proposed from standpoints of costs and benefits based on changes of time and space, and a comprehensive evaluation was made on timeliness, efficiency, risks, added- value of products and satisfaction of information in cold-chain logistics. [Result] The efficiency of cold chain logistics for vegetable can be greatly improved by temporal- spatial distribution model of cold chain logistics. [Conclusion] Costs and benefits of vegetables in temporal-apstial distribution could be evaluated by the model.
文摘采用顶空固相微萃取-气相色谱-质谱（head space solid-phase microextraction and gas chromatography mass spectrometry,HS-SPME-GC-MS）联用并结合电子鼻技术检测线椒的挥发性成分,研究1-甲基环丙烯（1-methylcyclopropene,1-MCP）处理对线椒在10℃贮藏过程中挥发性成分变化的影响。结果表明,HS-SPMEGC-MS方法共检测出52种挥发性成分,主要为醛类、醇类和酯类物质,1-MCP处理减缓了线椒醛类、酯类、酸类物质相对含量的降低,同时抑制了醇类、烃类以及其他类挥发性物质相对含量的增加,1-MCP处理可以保持线椒良好的挥发性物质成分变化,延缓其风味的改变;用电子鼻对线椒在10℃贮藏期间挥发性物质进行主成分分析、负荷加载分析及线性判别分析,结果均表明,1-MCP处理对线椒挥发性物质的影响主要在贮藏期第15~35天,10℃贮藏线椒在第15天的挥发性成分相对含量变化较大,是其新鲜度变化的拐点。
文摘为明确冷藏时间对葡萄贮后货架期芳香物质的影响,以‘无核寒香蜜’葡萄为试材,运用顶空固相微萃取-气相色谱-质谱(head space solid-phase microextraction and gas chromatography mass spectrometry,HS-SPME-GCMS)联用技术检测冷藏15、45 d出库后常温货架期间(0、3、6 d)挥发性成分的变化,并采用电子鼻对不同冷藏期(15、30、45、60 d)出库后常温货架的果实进行判别分析。结果表明,葡萄的挥发性成分主要由酯类、醛类和醇类组成,主要挥发性成分为乙酸乙酯、青叶醛、正己醇、叶醇、香茅醇。冷藏45 d后常温货架期间酯类和醇类物质的相对含量均低于冷藏15 d同期果实,醛类物质则较高。电子鼻结果表明,通过线性判别分析可以有效区分不同冷藏期的葡萄,贮后货架期间,除冷藏15 d出库后0、3 d货架重叠外,其余冷藏期货架期间均互不重叠,即随着贮后常温货架的延长,葡萄中挥发性成分变化较大,电子鼻区分效果越加明显;负荷加载分析分析得出,W1W(硫化氢、萜烯类)、W1S(芳香成分)、W2S(乙醇)传感器对挥发性气味的贡献较大,与HS-SPME-GC-MS分析相佐证。因此,HS-SPME-GC-MS结合电子鼻对葡萄冷藏时间及贮后货架期的芳香物质判别具有可行性。
