Volatile components of Fuzhou Yulu, a Chinese fish sauce, were analyzed by gas chromatography-mass spectrometry （GC-MS）, and two pretreatment methods, i.e., purge and trap （P＆T） GC-MS and ethyl acetate extraction...Volatile components of Fuzhou Yulu, a Chinese fish sauce, were analyzed by gas chromatography-mass spectrometry （GC-MS）, and two pretreatment methods, i.e., purge and trap （P＆T） GC-MS and ethyl acetate extraction followed by GC-MS, were compared. P＆T-GC-MS method determined 12 components, including sulfur-containing constituents （such as dimethyl disulfide）, nitrogen-containing constituents （such as pyrazine derivatives）, aldehydes and ketones. Ethyl acetate extraction fol- lowed by GC-MS method detected 10 components, which were mainly volatile organic acids （such as benzenepropanoic acid） and esters. Neither of the two methods detected alcohols or trimethylamine. This study offers an important reference to determine volatile flavor components of traditional fish sauce through modem analysis methods.展开更多
为明确宇璐沙棘和深秋红沙棘的生长、光合特性和生理生化物质对干旱胁迫的响应特征,以1年生宇璐沙棘与深秋红沙棘为试验材料,采用盆栽方法,设置持续120 d 3个水分梯度的处理,测试分析2个沙棘品种的生长性状,并结合2个沙棘品种在干旱胁...为明确宇璐沙棘和深秋红沙棘的生长、光合特性和生理生化物质对干旱胁迫的响应特征,以1年生宇璐沙棘与深秋红沙棘为试验材料,采用盆栽方法,设置持续120 d 3个水分梯度的处理,测试分析2个沙棘品种的生长性状,并结合2个沙棘品种在干旱胁迫期间光合特征和生理生化物质含量的变化,利用隶属函数法综合评价其抗旱能力。结果表明,干旱胁迫下2个沙棘品种的株高、地径和根长的生长均受到抑制,净光合速率(P_n)、蒸腾速率(T_(r))、胞间CO_(2)浓度(C_(i))、气孔导度(G_(s))、羧化效率(CE)呈减小趋势,气孔限制值(L_(s))和叶片瞬时水分利用效率(WUEi)呈增加趋势。与深秋红沙棘相比,宇璐沙棘根长更长,气孔调节机制更灵敏,具有较高的叶片瞬时水分利用效率和根系生理抗性来抵御干旱胁迫。与宇璐沙棘相比,深秋红沙棘的气孔导度、胞间CO_(2)浓度和蒸腾速率更高,具有较高的光合能力和叶片生理抗性,进而增强根系吸水能力,以抵御干旱胁迫。隶属函数评价结果表明,宇璐沙棘的叶片瞬时水分利用效率高于深秋红沙棘,宇璐沙棘的抗旱策略更为安全,抗旱性能更强。展开更多
基金supported by the Science and Technology Bureau of FujianProvince, China (No. B50701)the Foundation for Young Pro-fessors of Jimei University, China (No. C19005)
文摘Volatile components of Fuzhou Yulu, a Chinese fish sauce, were analyzed by gas chromatography-mass spectrometry （GC-MS）, and two pretreatment methods, i.e., purge and trap （P＆T） GC-MS and ethyl acetate extraction followed by GC-MS, were compared. P＆T-GC-MS method determined 12 components, including sulfur-containing constituents （such as dimethyl disulfide）, nitrogen-containing constituents （such as pyrazine derivatives）, aldehydes and ketones. Ethyl acetate extraction fol- lowed by GC-MS method detected 10 components, which were mainly volatile organic acids （such as benzenepropanoic acid） and esters. Neither of the two methods detected alcohols or trimethylamine. This study offers an important reference to determine volatile flavor components of traditional fish sauce through modem analysis methods.
文摘为明确宇璐沙棘和深秋红沙棘的生长、光合特性和生理生化物质对干旱胁迫的响应特征,以1年生宇璐沙棘与深秋红沙棘为试验材料,采用盆栽方法,设置持续120 d 3个水分梯度的处理,测试分析2个沙棘品种的生长性状,并结合2个沙棘品种在干旱胁迫期间光合特征和生理生化物质含量的变化,利用隶属函数法综合评价其抗旱能力。结果表明,干旱胁迫下2个沙棘品种的株高、地径和根长的生长均受到抑制,净光合速率(P_n)、蒸腾速率(T_(r))、胞间CO_(2)浓度(C_(i))、气孔导度(G_(s))、羧化效率(CE)呈减小趋势,气孔限制值(L_(s))和叶片瞬时水分利用效率(WUEi)呈增加趋势。与深秋红沙棘相比,宇璐沙棘根长更长,气孔调节机制更灵敏,具有较高的叶片瞬时水分利用效率和根系生理抗性来抵御干旱胁迫。与宇璐沙棘相比,深秋红沙棘的气孔导度、胞间CO_(2)浓度和蒸腾速率更高,具有较高的光合能力和叶片生理抗性,进而增强根系吸水能力,以抵御干旱胁迫。隶属函数评价结果表明,宇璐沙棘的叶片瞬时水分利用效率高于深秋红沙棘,宇璐沙棘的抗旱策略更为安全,抗旱性能更强。
