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424) In this study, 70 Wistar rats were randomly divided into seven equal groups (six experimental and one control), which consisted of animals belonging to both sexes.
* Subacute oral toxicity of combinations of selected synthetic pyrethroids, piperonyl butoxide, and tetramethrin in rats.
- In this study, 70 Wistar rats were randomly divided into seven equal groups (six experimental and one control), which consisted of animals belonging to both sexes. Different combinations of insecticides were administered daily to the experimental groups (group 1: cypermethrin + piperonyl butoxide (PBO); group 2: alphacypermethrin + PBO; group 3: deltamethrin + PBO; group 4: cypermethrin + PBO + tetramethrin; group 5: alphacypermethrin + PBO + tetramethrin; and group 6: deltamethrin + PBO + tetramethrin) for 28 days. During the study period, mortality and serious clinical findings were not observed in any animal. However, feed consumptions decreased in groups 1 and 3 (p < 0.05). Red blood cells, white blood cells, and hemoglobin levels, especially in cypermethrin and alphacypermethrin groups (groups 1, 2, and 4), were found to be higher than the control group (p < 0.05). Furthermore, biochemical changes related to liver, kidney functions, and protein metabolism occurred in males of almost all the groups. Relative liver and kidney weights of the male animals increased in the cypermethrin and alphacypermethrin groups (p < 0.05). The most common finding observed during the histopathological examination of all the experimental groups was centrilobular degeneration in the liver. It was concluded that although clinical symptoms were not observed, synthetic pyrethroid, synergist, and knockdown agent combinations might cause serious abnormalities when administered in certain doses in mammalians.
=>1.〜を勉強[研究]する, 学ぶ, 調べる, 2.調査, 勉強, 3.書斎, 勉強する
Overview of noun study
The noun study has 10 senses (first 8 from tagged texts)
1. (90) survey, study -- (a detailed critical inspection)
2. (17) study, work -- (applying the mind to learning and understanding a subject (especially by
reading); "mastering a second language requires a lot of work"; "no schools offer graduate study in
interior design")
3. (6) report, study, written report -- (a written document describing the findings of some
individual or group; "this accords with the recent study by Hill and Dale")
4. (6) study -- (a state of deep mental absorption; "she is in a deep study")
5. (6) study -- (a room used for reading and writing and studying; "he knocked lightly on the closed
door of the study")
6. (3) discipline, subject, subject area, subject field, field, field of study, study, bailiwick --
(a branch of knowledge; "in what discipline is his doctorate?"; "teachers should be well trained in
their subject"; "anthropology is the study of human beings")
7. (2) sketch, study -- (preliminary drawing for later elaboration; "he made several studies before
starting to paint")
8. (1) cogitation, study -- (attentive consideration and meditation; "after much cogitation he
rejected the offer")
9. study -- (someone who memorizes quickly and easily (as the lines for a part in a play); "he is a
quick study")
10. study -- (a composition intended to develop one aspect of the performer's technique; "a study in
spiccato bowing")
Overview of verb study
The verb study has 6 senses (first 6 from tagged texts)
1. (73) analyze, analyse, study, examine, canvass, canvas -- (consider in detail and subject to an
analysis in order to discover essential features or meaning; "analyze a sonnet by Shakespeare";
"analyze the evidence in a criminal trial"; "analyze your real motives")
2. (17) study -- (be a student; follow a course of study; be enrolled at an institute of learning)
3. (15) study, consider -- (give careful consideration to; "consider the possibility of moving")
4. (13) learn, study, read, take -- (be a student of a certain subject; "She is reading for the bar
exam")
5. (5) study, hit the books -- (learn by reading books; "He is studying geology in his room"; "I
have an exam next week; I must hit the books now")
6. (2) study, meditate, contemplate -- (think intently and at length, as for spiritual purposes; "He
is meditating in his study")
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