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A variety of fennel(Foeniculum vulgare var.dulce)whose blanched aromatic ,celerylike stalks are eaten as a vegetable.

由不饱和以及芳香化合物振动产生的吸收谱带将在第三和第五章中讨论。

But, due to the limitations with isolation or detection techniques, explorations of the valuable Gordonia members are restricted.

此属之微生物具有降解多环类芳香族碳氢化合物的特性,在生物复育上扮演重要角色。

The design, synthesis, characterization and self-assembled monolayers of heterocyclic aromatic selenium compounds were studied in this project.

开展硒芳香杂环化合物的设计、合成、表征和自组装单分子膜研究工作。

By analyzing and researching the corrosion resistant mechanism of adsorption typal acidification corrosion inhibitor, taking single equational experimental method, making use of mannich reaction and using the hydrochloric acid as catalyst and the ethyl alcohol absolute as solvent, the new acidification corrosion inhibitor HZ-1 is synthesed by formaldehyde、hypnone、aromatic amines in the present research of this thesis.

本文通过对吸附型酸液缓蚀剂缓蚀机理的分析和研究,利用单因素实验方法,采用曼尼希反应,以盐酸为催化剂,无水乙醇为溶剂,用甲醛、苯乙酮、芳香多胺合成了新型酸化缓蚀剂HZ-1。

However,they are generally insoluble and infusible in their fully imidized form,which would lead to processing difficulties;and this process of polyintermediate has several inherent problems such as emission of volatile byproducts(e.g.,H_2O)and storage instability etc.

然而,完全亚胺化的芳香族聚酰亚胺通常不溶不熔,难于加工,而采用聚酰胺酸中间体加工时,又存在储存稳定性差,加工过程中会产生可挥发小分子副产物(如;H_2O)等问题。

The features of molecular structure of aromatics, resins and asphaltenes were investigated by ruthenium-ion-catalyzed oxidation, where involatile acid products were methylated with excess diazomethaneether and volatile acids were esterified with phenacyl bromide.

利用钌离子催化氧化方法对大港减压渣油芳香分、胶质和庚烷沥青质进行了选择性降解,通过GC、GC-MS等分析手段对降解反应产物中一元正构脂肪酸、α,ω-二元正构脂肪酸和苯二~六元羧酸的含量和分布分别进行了定量分析。

Thus,α,β-unsaturated ketones were prepared by base-catalized aldol condensation between substituted arylaldehydes and acetones. Using iodosobenzene diacetate as oxidants, the resulting α,β-unsaturated ketones will be transformed to β,γ-unsaturated carboxylic acid esters.

以不同取代的芳香醛跟丙酮缩合后可以得到α,β-不饱和酮,再用iodosobenzene diacetate做氧化剂氧化,可以成左卤o到β,γ-不饱和碳酸酯类化合物。

A series of 3 - aryl - 3 -( 5,5 - dimethyl - 3 - hydroxy - 2 - cyclohexene - 1 - one - 2 - yl) propanoic ester s were synthesized by reaction between aromatic aldehydes ,5,5- dimethyl -1,3-cyclohexanedione and isopropylidene malonate catalyzed by KF - Al2O3 in alcohols.

在KF-Al_2O_3催化下,将芳香醛3,5-二甲基-1,3-环己二酮及丙二酸亚异丙酯在醇中反应,一锅式合成了一系列的3-芳基-3-(5,5-二甲基-3-羟基-2-环己烯-1-酮-2-基)丙酸酯。

The majority of nonaromatic compounds do not have such high C∶H ratios.

大部分非芳香族化合物的C∶H比例没有这样高。

Results The rectangular stemwith longitudinal groove,surface of leaf with fovea,odor acroma were the key identical characters of Ocimum basilicum L.

结果 九层塔的茎近方形,有纵沟纹、叶片表面有凹点,气味芳香。

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推荐网络例句

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。

However, to get a true quote, you will need to provide detailed personal and financial information.

然而,要让一个真正的引用,你需要提供详细的个人和财务信息。