Список № 3. Английские предложения
1.Our scientists will be investigating the samples of these substances.
2.It had already been mentioned that many of the elementary gases could exist in diatomic molecules.
3.By late 2005 at least 160 such extrasolar planets had been detected.
4.The vapor pressure of a liquid is affected by changes in tempera-
ture.
5.The synthesis of element 114 will have been made much easier as soon as it is possible to accelerate ions heavier than krypton.
6.Next year they will have been carrying out this experiment for 5 years.
7.He carried out his first experiment at the age of 18.
8.New chemical processing and materials will provide a crucial alternative energy source.
9.He was appointed professor of the physico-chemical department.
10.Long before this, however, some of the chains will have been pulled approximately parallel.
11.In 1871 D. Mendeleyev was investigating the elasticity of gases and gave a formula for their deviation from Boyle’s law.
12.This crucible has been used for heating some solution.
13.Ga – As light – emitting diodes are beginning to find their way into optical encoders where their solid – state reliability offsets their high initial cost.
14.Some of the properties of this substance will be predicted.
15.They are discussing a very important problem at the moment.
16.The light was shed on the use of new ceramic products.
17.A base is referred to as a substance that accepts protons from another substance.
18.Our scientists have given great attention to the development of peaceful uses of nuclear energy.
19.He has made about twenty discoveries for our research work.
20.They had founded that new research-center by the end of the
year.
21.The ingredients for the reaction had traditionally included ten hydrides that were not only toxic but also expensive and difficult to handle.
22.Many ceramic materials are being mass produced now.
23.Scientists had assumed that, buckyballs posed no potential hazard to living organism and their environment.
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24.Fractional distillation is used extensively in chemical industry as a means of separating and purifying many products.
25.The force of attraction between the fundamental units of a substance dictate whether at a given temperature and pressure, that substance will exist in the solid, liquid, or gas phase.
26.Electrons have been spoken of as moving in orbits about the atomic nucleus.
27.It has been found out that in the construction of ceramic materials much depends on how atoms are staked.
28.By the end of the 19th century, the internal combustion engine was challenging the steam engine in many industrial and transport applications.
29.The Technological Institute was being built when we came to this town.
30.For centuries ceramic objects have been made by strongly heating a vessel formed from a paste of powered minerals.
31.The importance of analytical chemistry has never been greater than it is today.
32.He has been studying chemistry for many years.
33.Liquid solutions will be dealt with in this chapter.
34.He has solved the substance easily.
35.The probe had been released from the Cassini (NASA) spacecraft, which had been in orbit around Saturn since July 2004.
36.Chemical reactions are accompanied by definite changes in en-
ergy.
37.Observations in January 2005 showed that the object had been slowly moving.
38.The chemist observes nature and attempts to understand its
secrets.
39.For several years the status of Pluto as the most distant planet of the solar system had been questioned because of the discovery of other similar icy bodies in the Kuiper Belt.
40.The 20th century has seen dramatic advances in the comprehension of the marvelous and complex chemistry of living organisms.
41.Next year our scientists will solve many new problems.
42.The devices were being developed that did away with the external pump laser.
43.For many years a considerable work has been carried out to convert ethylene into motor fuel.
44.In spring he will have been managering the Chemistry Department at the University for 20 years.
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45.Common batteries contain chemical substances that will deliver current at a constant voltage until the substances are consumed.
46.They will have completed this experiment by the end of the
year.
47.New ceramics strong enough to be used as turbine blades in jet engines are being manufactured.
48.Inorganic chemistry is concerned with mineral substances.
49.The solution was heated and evaporated.
50.The students used some solvents for their experiments.
51.All these impurities will have been easily removed by 12 o’clock.
52.The role of gases and of air had been dimly glimpsed in the 17th century, but it was not fully seen until the classic experiments of Joseph Black on magnesia alba (basic magnesia carbonate) in the 1750s.
53.The scientists of our research centre have been investigating this chemical phenomenon since March 2003.
54.Experimentation in chemistry began only in the 17th and 18th centuries.
55.After a period of quiescence in the early part of the 20th century, inorganic chemistry has again become an exciting area of research.
56.The Japanese and American researchers studied a polycrystalline sample of the material that had been cooled to an extremely low temperature.
57.The economy and comparative cleanness of the hot-air engine were making it once more the subject of intensive research in the early 1970s.
58.On the other hand, enzymes, as catalysts, are receiving increasing attention from physical chemists.
59.Great research work is being carried out by our students.
60.This method is being used in our laboratory.
61.It has been already noted that hydrogen is found in the free state only in minute quantities.
62.The first years of the 21st century will see many new exciting discoveries in the processes and products of chemistry.
63.Every day she attends lectures on chemistry.
64.Chemical inquiry will lead to a better understanding of the behavior of both natural and synthetic materials and to discovery of new substances that will help future generations better supply their needs and deal with their problems.
65.In the second half of the 19th century triple – or quadruple – expansions were being used in industry and marine propulsion.
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66.Today many scientists are working at the investigation of the new properties of ceramics.
67.The properties of this substance change when we heat it.
68.But the use of wind power declined sharply in the 19th century with the spread of steam and the increasing scale of power utilization
69.About the same time (1927) another American scientist, Robert S. Mulliken, was developing an alternative theory of molecular structure based on what he called orbitals.
70.Chemistry studies the composition the properties and the structure of matter.
71.In marine propulsion the steam turbine remains an important source of power despite competition from the internal – combustion engine.
72.There is a certain probability that half of the atoms of a radioactive substance will have decayed after a certain time – i.e., the half life of the material.
73.All the samples will be carefully examined.
74.Chemists discovered many laws, investigated many important phenomena in life.
75.Over the years chemists have discovered chemical reactions that indicate the presence of such elemental substances by the production of easily visible and identifiable products.
76.It has been noted that chlorine dioxide reacts water.
77.The sodium salt is being manufactured in industrial quantities.
78.They have solved recently many important problems in the field of artificial radioactivity.
79.These students are trying to obtain a transparent liquid.
80.This new material was produced at our plant.
81.Hydrogen peroxide has been heated.
82.Chemists are working to develop methods of assessment.
83.Analytical chemistry deals with the methods of separation.
84.They have been carrying out this experiment since last week.
85.Now he is carrying out an experiment.
86.This example was referred to by our teacher.
87.She will work in the field of nuclear physics next year.
88.This analysis was examined by our students.
89.Although practical systems to store and manipulate qubits had not been constructed yet, a number of laboratories had produced devices that might form part of such a system.
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90.Our students have been trying to dissolve this substance for an
hour.
91.The growing public health problem was encouraging pharmaceutical chemists to search for new antibiotics.
92.Every chemical element is characterized by a definite atomic number.
93.New technologies often require much chemical expertise.
94.The explosion will synthesize heavier elements and spread them throughout the surrounding interstellar medium, (where they provide the raw material for the formation of new stars and eventually of planets and living organisms).
95.Over time more than 8’000’000 different chemical, substances, both natural and artificial, have been characterized and produced.
96.Chemistry was still struggling to free itself from the traditions of alchemy.
97.Lately numerous applications of liquid air have been proposed and have been used in all branches of life.
98.Many new research institutes are being built in our country.
99.Last year these scientists dealt with quantitative analysis.
100.Recently our factories have produced many new synthetic prod-
ucts.
101.The analytical balances are used for accurate weighing of sam-
ples.
102.Chemical processes and synthetic materials are being introduced into industry on a large scale.
103.They will be carrying out an experiment at 12 o`clock tomorrow.
104.Then Corresponding Member of the Czechoslovak Academy of Sciences brought a gift from America, where he had been conducting a joint experiment with American chemists, - a sample of the Alendo meteorite.
105.In 1865 Mendeleyev was granted the Doctor of Science degree for a thesis on the combination of alcohol with water.
106.If the barrier is removed, the gas will expand into the evacuation
vessel.
107.Some new results were obtained by a group of research work-
ers.
108.Druin’s team was preparing an experiment with a much improved technique to study decay of element 104.
109.Two years ago he studied the problems of the crystal structure.
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