Oil-gas remote sensing information is obtained from satellite TM data through graph-ic treatment in the light of the hydrocarbon-microseepage theory. The nine target areas (ofthree types) selected on this basis coinci...Oil-gas remote sensing information is obtained from satellite TM data through graph-ic treatment in the light of the hydrocarbon-microseepage theory. The nine target areas (ofthree types) selected on this basis coincide well with the occurrence of natural gases and have been proved by subsequent prospecting. Plants in the target areas are characterized, as a result of hydrocarbon- microseepage, by abnormal spectral features with the absorption peaks of chlorophyll shifting toward blue light, reflectivity in the range of visible light increasing and re-flectivity in the near infrared region decreasing.展开更多
为研究赤水河流域不同产区酱香型白酒的风味物质组成差异,采用气相色谱法-火焰离子化器(GC-FID)对下游临河产区(XY)、茅台河谷产区(MT)和河东低中山产区(HD)样品进行了风味特征差异分析以及感官评价。结果表明,MT产区酱香突出,酒体较丰...为研究赤水河流域不同产区酱香型白酒的风味物质组成差异,采用气相色谱法-火焰离子化器(GC-FID)对下游临河产区(XY)、茅台河谷产区(MT)和河东低中山产区(HD)样品进行了风味特征差异分析以及感官评价。结果表明,MT产区酱香突出,酒体较丰满;XY产区青草香明显,酒体较干净;HD产区偏甜。通过对不同产区风味物质的分析,研究发现,MT产区酒样中挥发性物质总含量最高,HD产区最低,不同产区的酸类、醛酮类、芳香族类以及吡嗪类物质含量差异较大。香气活度值分析表明,乙酸苯乙酯、棕榈酸乙酯、仲丁醇、异戊醇、辛醇5种物质是三个产区风味差异的贡献物质。利用正交偏最小二乘判别分析可以有效建立产区分类模型,并结合VIP值(variable importance for the projection,VIP)筛选出了8种潜在差异性化合物,分别是乳酸乙酯、乙酸乙酯、乙醛、正丙醇、异戊醇、乙酸、丙酸以及乙缩醛。相关性结果表明,乙醛和乙缩醛、正丙醇和苯乙酸乙酯、辛酸乙酯、正丁醇等物质分别与青草香、曲香、花果香、辣味具有显著正相关。该文的研究结果将有助于消费者对不同产区酱香型白酒体系的理解和选择。展开更多
文摘Oil-gas remote sensing information is obtained from satellite TM data through graph-ic treatment in the light of the hydrocarbon-microseepage theory. The nine target areas (ofthree types) selected on this basis coincide well with the occurrence of natural gases and have been proved by subsequent prospecting. Plants in the target areas are characterized, as a result of hydrocarbon- microseepage, by abnormal spectral features with the absorption peaks of chlorophyll shifting toward blue light, reflectivity in the range of visible light increasing and re-flectivity in the near infrared region decreasing.
文摘为研究赤水河流域不同产区酱香型白酒的风味物质组成差异,采用气相色谱法-火焰离子化器(GC-FID)对下游临河产区(XY)、茅台河谷产区(MT)和河东低中山产区(HD)样品进行了风味特征差异分析以及感官评价。结果表明,MT产区酱香突出,酒体较丰满;XY产区青草香明显,酒体较干净;HD产区偏甜。通过对不同产区风味物质的分析,研究发现,MT产区酒样中挥发性物质总含量最高,HD产区最低,不同产区的酸类、醛酮类、芳香族类以及吡嗪类物质含量差异较大。香气活度值分析表明,乙酸苯乙酯、棕榈酸乙酯、仲丁醇、异戊醇、辛醇5种物质是三个产区风味差异的贡献物质。利用正交偏最小二乘判别分析可以有效建立产区分类模型,并结合VIP值(variable importance for the projection,VIP)筛选出了8种潜在差异性化合物,分别是乳酸乙酯、乙酸乙酯、乙醛、正丙醇、异戊醇、乙酸、丙酸以及乙缩醛。相关性结果表明,乙醛和乙缩醛、正丙醇和苯乙酸乙酯、辛酸乙酯、正丁醇等物质分别与青草香、曲香、花果香、辣味具有显著正相关。该文的研究结果将有助于消费者对不同产区酱香型白酒体系的理解和选择。
