chemical的示例

• They use special chemicals to accelerate the growth of crops.

• Organic chemicals are used in the manufacture of plastics, fibres, solvents and paints.

• The body produces chemicals that are natural painkillers.

• Toxic chemicals continue to be dumped in the North Sea.

• Many chemicals have a damaging effect on the environment.

• Sodium chloride is the chemical name for common salt.

• All chemical weapons facilities will be deactivated.

• Estimates of the amount of money needed to decontaminate the heavily polluted chemical installations vary.

• We had to learn chemical formulae at school, but I can only remember H2O for water.

• The chemical properties of coal are still incompletely understood.

• It is especially worth noting that in the market, the price of organic food is at least twice that of food treated with chemicals.

• Her history of chemical theory refuses to isolate theory from the laboratory, the lecture hall, or the public and its philosophical interests.

• Any given event may be described by referring to various levels of description, such as the physical, chemical, biological, psychological, and sociological.

• To induce chemical reactions on these surfaces it is important to consider an energy source.

• Recent years have seen considerable progress in the development of chemical self-replicating systems.

• The cost of purpose-built manufacturing facilities and chemical synthesis are a critical barrier to the commercial development of many potential pesticides.

• No reduction in chemical fertilizer use for potatoes and silage corn was observed and increased crop yields were unlikely.

• Such a conclusion may have practical implications relating to chemical change in alloys.

• Chickens' diseases are typically objects of prevention, mainly by mechanical distribution of chemicals throughout the entire flock.

• However, cattle producers used to controlling tick infestations with chemical acaricides typically treat reactively.

• The facility is used for different biological, chemical and aerodynamical experiments.

• However, it is difficult to increase a signal which is specific to a single individual because of chemical mimicry.

• It was demonstrated that by fixing the chemical potential the average number or concentration can be determined.

• Many recent studies have demonstrated that astrocytes release chemical transmitters in a process termed gliotransmission.

• Geochemical observations appear to mirror palaeontological data, thus possibly relating chemical changes within the carbon cycle to biotic evolution.