从成分的角度来看玫瑰油和香水月季油的不同用途

本文综述了玫瑰油和香水月季油成分的差异、香气的不同以及各自不同的用途。香水月季油中的3,5-二甲氧基甲苯是一个十分有用的成分,它具有镇静作用,可以广泛用于芳香治疗、皮肤护理和化妆品。     

芹菜籽净油的制备、成分分析及应用

利用湖北旱芹菜籽制备芹菜籽净油,气相色谱/质谱联用共分析鉴定出26种挥发性香气成分,其中小茴香醇、表蓝桉醇、α-紫罗兰酮、3-乙基苯酞、3-异丁烯基苯酞为芹菜籽中首次鉴别出的物质。将芹菜籽净油应用于5元"红金龙"、9元"红金龙"、17元"黄鹤楼"和20元"黄鹤楼"卷烟中,具有丰富烟香、增加辛香香韵、柔和细腻及顺畅烟气、增加烟气厚实感的作用,尤其在5元"红金龙"中应用效果最好,且在添加量为100 mg/kg时效果较佳。     

改进的Rose釜用于测取糠醛—水稀溶液的汽液平衡数据

本文首次采用改进的Ｒｏｓｅ汽液平衡釜,测定了糠醛－－－水稳溶液在常压下的汽液平衡数据,报道了实验方法及分析手段,并通过实验数据与样验的文献数据的比较,检验了改进的Ｒｏｓｅ釜对此体系的可靠性。     

贵州湄潭苦丁茶挥发性成分的GC/MS分析

研究了贵州湄潭产苦丁茶挥发油的化学成分。用水蒸气蒸馏提取贵州苦丁茶挥发油,用GC-MS分析和鉴定出化学成分,使用峰面积归一法确定其百分含量。结果表明:挥发性成分的得率分别为0.17%。从苦丁茶挥发油中鉴定出13种(占挥发油总量的81.64%)化合物,苦丁茶挥发油的主要成分是β-芳樟醇、β-月桂烯、α-松油醇、(Z)-柠檬醛、(E)橙花醇。不同地区的苦丁茶挥发油的主要成分和含量差异差较大,在其饮品开发利用中都应区别对待。     

用分子蒸馏技术提取的玫瑰精油的成分分析

采用GC—MS分析方法,对分子蒸馏法提取的玫瑰精油成分进行分析,共鉴定出78种化学成分,含量大于1％的成分20种,其中苯乙醇22．606％、香茅醇12．015％、香叶醇6．772％、丁子香酚6．194%、橙花醇2．329％。     

Study of the Fractional Composition of Liquid Products of Pyrolysis of Solid Organic Waste in Liquid Lead

Theoretical Foundations of Chemical Engineering - The regularities of pyrolysis of solid organic wastes when they are heated by a lead melt have been studied. Used car tires, lignin, sawdust, and...     

Effects of Drying Treatments on the Composition of Volatile Compounds in Dried Nectarines

The effects of drying treatments including dryer type, drying conditions, and sample preparation on the composition of volatile compounds in two cultivars of dried Australian nectarines were investigated in this study. A cabinet dryer, a tunnel dryer, and a heat pump dryer were evaluated. The sample preparation included halving or slicing the fruit to different slice thickness and in different directions. The volatile compounds in fresh and dried nectarines were isolated using Likens Nickerson simultaneous distillation and extraction technique and identified by gas chromatography. The results indicated that a heat pump dryer was the best system for preservation of volatile compounds in sliced dried fruit in terms of lactones and terpenoids followed by cabinet dryer and tunnel dryer.     

Effects of Drying Treatments on the Composition of Volatile Compounds in Dried Nectarines

The effects of drying treatments including dryer type, drying conditions, and sample preparation on the composition of volatile compounds in two cultivars of dried Australian nectarines were investigated in this study. A cabinet dryer, a tunnel dryer, and a heat pump dryer were evaluated. The sample preparation included halving or slicing the fruit to different slice thickness and in different directions. The volatile compounds in fresh and dried nectarines were isolated using Likens Nickerson simultaneous distillation and extraction technique and identified by gas chromatography. The results indicated that a heat pump dryer was the best system for preservation of volatile compounds in sliced dried fruit in terms of lactones and terpenoids followed by cabinet dryer and tunnel dryer.     

胆甾型液晶的合成及显色示温液晶组成

合成并表征了两种对正烷氧基苯甲酸胆甾醇酯液晶 ,并用于显色示温混合液晶的配制。通过胆甾型液晶的选择及不同含量的调配 ,获得变色温度范围在 1 0～ 40°C、色泽鲜艳、温度感应灵敏、变色可逆的胆甾型混合液晶组成。讨论了混合液晶组成对显色示温的影响     

田基黄挥发油化学成分的GC-MS分析

以田基黄为原料,用水蒸气蒸馏法制备了田基黄挥发油,并用气相色谱-质谱联用法分析了田基黄根和茎叶挥发油的化学成分。结果表明,田基黄茎叶挥发油中鉴定出43种组分,其中烃、醇(酚)、醛酮、酸、酯、胺六大类物质的相对含量分别为62.16%、8.12%、2.72%、1.24%、18.96%、5.75%;田基黄根挥发油中共检出32个组分,其中烃、醇(酚)、醛酮、酸、酯、胺六大类物质的相对含量分别为31.92%、11.47%、9.95%、0.56%、40.03%、4.13%。