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| Description of insecticide (noun: plural: insecticides) a chemical used to kill insects Samples of insecticide Insecticides may be toxic to humans. The most effective way of combatting river blindness until fairly recently was by spraying the breeding grounds with insecticide, a process which will continue for several years yet.
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| Description of antibiotic (adjective: plural: antibiotics) a substance that destroys bacteria Samples of antibiotic Antibiotic drugs have bactericidal properties. It is unwise for general practitioners and the staff of casualty departments to delay giving antibiotic treatment until a lumbar puncture has been performed, such a response may prove fatal.
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| Description of isotope (noun: plural: isotopes) atoms of the same element with the same number of protons, different numbers of neutrons and therefore different mass numbers Samples of isotope Elements are usually present naturally as a mixture of isotopes. Carbon 14 is a radioactive isotope of carbon that is absorbed by all living things; the proportion of carbon 14 to other isotopes of carbon remains constant, but when something dies, the carbon 14 in it decays at a known rate, while the other isotopes stay the same.
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| Description of glycocalyx (noun: plural: glycocalyces) lipid and protein coat which forms part of the plasma membrane in animal cells Samples of glycocalyx The glycocalyx has a role in intercellular communication. The potential for improving ocular drug delivery by using a "smart" soluble polymer, which can interact with the corneal glycocalyx and prolong drug retention, is considerable.
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| Description of resuscitate (verb: resuscitated; resuscitated; resuscitating) to bring back to life Samples of resuscitate The patient collapsed but was successfully resuscitated.
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| Description of cytochrome (noun: plural: cytochromes) protein that contains iron and acts as an electron and hydrogen acceptor for cellular energy processes Samples of cytochrome FAD and NAD are cytochromes. Hubel and his colleagues had studied the visual cortex of the rhesus monkey for many years without observing these cells and it was only when the cytochrome oxidase blobs had been demonstrated consistently and they started to look for receptive-field properties within them that they obtained these surprising results.
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| Description of s-block element (noun: plural: s-block elements) members in groups 1 and 11 of the periodic table Samples of s-block element The S-block elements are reactive metals.
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| Description of nausea (noun: no plural) a sick feeling; wanting to vomit Samples of nausea Vomiting may follow nausea. Symptoms of mild poisoning may include nausea, vomiting and diarrhoea: skin irritation, rashes or swelling; headache; sudden elation or depression; abdominal pains; trembling or giddiness.
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| Description of atrium (noun: plural: atriums) chamber of the heart Samples of atrium The right atrium receives venous blood from the vena cavae.
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| Description of retina (noun: plural: retinas) light-sensitive cells lining the eye Samples of retina The retina is at the back of the eye.
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