化学化工专业英语试卷Newly compiled on November 23, 2020
element：
11. orbital electron：：attraction of organic compounds is weak, so organic compounds are
usually volatile and possess
low melting points. 3．Benzene can undergo the
typical substitution
reactions of halogenation, nitration, sulphonation and
Friedel-Crafts reaction. 4．Evaporation is conducted by vaporizing a portion of the
solvent to produce a
concentrated solution or thick
liquor.
5．The presence of a
substituent group in benzene
exerts a profound control
over both orientation and the
ease of introduction of the
entering substituent. 6．The functional group of a ketone consists of a carbon
atom connected by a double
bond to an oxygen atom.
7．At equilibrium, these two rate are equal; cupric ion is
still reacting with ammonia
molecules to form the
complex, and the complex is
still decomposing, but just
as much cupric ammonia
complex is being
decomposed in unit time as
is being formed. 8．The reaction of an acid
chloride with an amine is
used commercially in the
manufacture of the very
important range of semi-
synthetic penicilings,first
produced by the Beechan
Group in 1959.
9．Thus satisfactory binding propertise are essential for
trouble-free compression and
the production of good
quality cakes over long
manufacturing periods. 10．The synthesis of organic
compounds involves
conversion of available
substances of known
structure, through a
sequence of particular,
controlled chemical
reactions, into other
compounds bearing a
desired molecular
structure.
The active ingredients were identified in the unsaponifiable fraction of this vegetable product. After solvent extraction and drying, the pure unsaponifiables are obtained in the form of a waxy solid. This
四、 Translate the following paragraph into Chinese （本大题共1个小题，共25分）
waxy solid is then redissolved in untreated shea butter to increase the unsaponifiable content and thus lead to the unsaponifiable shea butter concentrate. Used in cosmetics at levels of up to 2%,it provides excellent protection against sunlight and skin dryness.
Another example is the extract of the kola nut, known
for its anti-irritant properties.
As available in the market, it
has an objectionable color and
odor . At Estee Lauder, we
analyzed and separated its
constituents, identified the
individual components with
anti-irritant properties, and
recombined them in the most
effective ratio. In the process ,
objectionable color and odor
were removed and possible
allergens（过敏原）
eliminated. All this indicates
that cosmetics formulated with plant extracts today can be
more effective and , at the
same time, more elegant than
10 or 20 years ago.
采用一种简单、可靠并且有效的气相色谱法，来同时测定草药鱼腥草和鱼腥草注射液中8种活性组分的含量。在研究的浓度范围内，发现鱼腥草中草药和注射液中8种活性组分的R2的值高于，都有良好的线性行为，其日内和日间的精度都很高，其RSD小于2%，且在三种不同浓度下获得的8种组分的平均回收率范围为%–%，RSD 为～%。该方法已成功应用于鱼腥草中草药和注射液的这8种活性成分的同时测定，包括不同厂家、不同批次生产注射液
过程中的中间产物。这表明本
文提出的方法特别适合注射液
的常规分析和在生产过程中的
质量控制。
五、 Translate the following paragraph into English （共15分）