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1)  secondary aroma components
二类香气物质
1.
The comb in ed effects of dozens of even hundreds of components eventually formed the aroma of cider and these components were mainly the inherent volatile matters in app les treated as primary aroma components and the metabolic products of yeast dur ing the fermentation of cider treated as secondary aroma components.
苹果原料中主要是一类香气物质;发酵过程中产生的主要是二类香气物质
2)  primary aroma componen ts
一类香气物质
3)  aromatic components
香气物质
1.
Analysis of aromatic components in juice of kiwifruit by SPME/GC/MS;
猕猴桃果汁香气物质的固相微萃取GC/MS分析
2.
The aromatic components in Wuzi green tea were extracted by SPME and were analyzed by GC-MS.
不同生产季节绿茶中香气物质构成种类基本相同,其含量分布存在差异。
3.
【Method】 Simultaneous Distillation and Extraction(SDE) were employed to extract the aromatic components of green tea in greenhouse and out of greenhouse.
【结论】2种茶叶香气物质的基本组成成分相似,但香气类型、香气物质的组成比例、香气指数、香气物质的总量和大多数香气组分的相对含量差异较大。
4)  aroma component
香气物质
1.
The correlation between the content accumulation of burley aroma components and curing conditions;
白肋烟香气物质的积累与调制条件的关系
2.
A rapid and simple method was developed for determination of aroma components in Brandy by head space solid-phase micro-extraction (HS-SPME) coupled to capillary gas chromatography-mass spectrometry (GC-MS).
利用顶空固相微萃取(HS-SPME)和气质联用技术(GC/MS)对白兰地酒中的香气成分进行分析,研究了萃取头种类、样品酒精度、预热时间、萃取温度、萃取时间和电解质NaCl用量等对白兰地酒中香气物质萃取的影响,优化了提取条件;比较了不同极性色谱柱对白兰地香气成分的分析效果,建立了快速测定白兰地酒中香气物质的方法。
3.
We further studied the influence of dominating microbial species on the content of aroma components of the fermentation flue-cured tobacco.
采用恒温恒湿发酵条件研究优势增质菌对发酵烤烟烟叶中香气物质含量的影响。
5)  aroma components
香气物质
1.
Effects of sesame cake fertilizer on the main volatile aroma components in flue-cured tobacco leaves;
配施芝麻饼肥对烤后烟叶主要挥发性香气物质含量的影响
6)  Aroma matter
香气物质
1.
The changes of aroma matter and chemical components in tobacco leaves during aging were studied with flue-cured tobacco (Nicotiana tabacum L.
)为试材,研究了陈代期间烟叶香气物质和主要化学成份含量的变化。
2.
Under the condition of 49℃, RH 60%, through the 40-day artificial fermentation, we can see that: With the artificial fermentation beginning, most of the aroma matters are increasing, at 15th-25th day the content is the highest, but then it begins to decrease.
以雪茄外包皮烟为材料,在温度49℃,相对湿度为60%的条件下在恒温恒湿箱中进行发酵,发酵天数为40天,结果表明:发酵开始后,大部分香气物质成分的含量上升,在发酵15天—25天时,烟叶香气物质含量最高,而后又开始下降。
补充资料:多氯二苯并二噁英类
分子式:
CAS号:

性质:(1)多氯二苯并二噁英类(polychlorinated dibenzo-p-dioxins;PCDD)的简称。又称二苯基二噁英(diphenylene dioxins)。中间环5、10两位置为氧原子,其余1~4,6~9各位置可被卤素原子或有机基团取代。被氯原子取代时,随氯原子数(1~8个)的多少,可形成8个同系物,75个异构体(同族体)。性质稳定,不易分解。其毒性与氯原子取代的位置密切相关,有4个氯原子的二噁英是有毒的(共22个),其中四氯二苯并二噁英(TCDD)毒性最强。二噁英的前驱物是氯联苯、氯苯、氯苯酚等含氯芳香烃化合物,在燃烧过程中形成二噁英。它在自然界能天然生成,人为来源主要是废弃物的焚烧排放物,如城市垃圾、工业废物、医院废物、防腐剂处理过的木材、有机制品、电容器和绝缘器中绝缘液、旧轮胎作能源等的焚烧;工业生产的排放源有造纸厂漂白废液、生产氯的石墨电极渣、催化剂高温氯化活化、钢铁冶炼和废金属回收等。在环境中的分布,地表土中含量最多,植物和河湖沉积物中其次,大气飞灰和地表水中较少。动物实验证实二噁英有致癌致畸作用,列为人类可疑致癌物,其毒性危害程度远超过有机氯农药和多氯联苯。(2)特指四氯二苯异二噁英。

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