The present report evaluates the effects of formaldehyde (FA) exposure on peripheral lymphocytes by using heth genetic and immunological parameters. Twenty-three non-smoking students in the study had inhalation exposu...The present report evaluates the effects of formaldehyde (FA) exposure on peripheral lymphocytes by using heth genetic and immunological parameters. Twenty-three non-smoking students in the study had inhalation exposure to 0.508 ±0. 299 mg/m3 of FA for a Period of 8 weeks (3h × 3 times each week) during anatomy classes. As for composition of lymphocyte subsets after FA exposare,significant increase was found in the percentage of CD19(B cells), while sighficant decrease was observed in CD3(total T cells), CD4(T helper-inducer cells), and CD8(T cytotoxic-suppressior cells) with a P<0 .01. Increase in the ratio of T-helper-inducer cells to T-cytotoxic-suppressor cells (T4 / T8) was also observed with statistical sighcance after exposure (P < 0.001). In the meanwhile,no significant difference (P > 0 .05) was reported between lymphocyte prolifendion rate and sisterchromatid exchange (SCE) at the exposure level and duration. It is suggested that the lymphocyte subsets may be most susceptible to the effects of FA, though a single immunological endpoint is rarely related with pathophysiological interpretation.展开更多
This paper focuses on providing effective feedback for the students in the writing process.Excessivemarking is defective as it reduces their motivation,whereas minimal marking is recommended as itimproves their inner ...This paper focuses on providing effective feedback for the students in the writing process.Excessivemarking is defective as it reduces their motivation,whereas minimal marking is recommended as itimproves their inner drive for writing.In addition,there are other forms of feedback,such as peerfeedback,comments and face-to-face discussions.The students are required to act on the feedback totheir own advantage.It has been proved that the proposed correcting method is time-saving,chal-lenging and efficient.展开更多
To be a good headteacher of the vocational and technical school,he should face the principle that we focus on the education of morals and thoughts and make a good model for the students by ourselves.Secondly,we should...To be a good headteacher of the vocational and technical school,he should face the principle that we focus on the education of morals and thoughts and make a good model for the students by ourselves.Secondly,we should take good care of them,respect them and understand them.Thirdly,we should make good use of the class committee.展开更多
文摘The present report evaluates the effects of formaldehyde (FA) exposure on peripheral lymphocytes by using heth genetic and immunological parameters. Twenty-three non-smoking students in the study had inhalation exposure to 0.508 ±0. 299 mg/m3 of FA for a Period of 8 weeks (3h × 3 times each week) during anatomy classes. As for composition of lymphocyte subsets after FA exposare,significant increase was found in the percentage of CD19(B cells), while sighficant decrease was observed in CD3(total T cells), CD4(T helper-inducer cells), and CD8(T cytotoxic-suppressior cells) with a P<0 .01. Increase in the ratio of T-helper-inducer cells to T-cytotoxic-suppressor cells (T4 / T8) was also observed with statistical sighcance after exposure (P < 0.001). In the meanwhile,no significant difference (P > 0 .05) was reported between lymphocyte prolifendion rate and sisterchromatid exchange (SCE) at the exposure level and duration. It is suggested that the lymphocyte subsets may be most susceptible to the effects of FA, though a single immunological endpoint is rarely related with pathophysiological interpretation.
文摘This paper focuses on providing effective feedback for the students in the writing process.Excessivemarking is defective as it reduces their motivation,whereas minimal marking is recommended as itimproves their inner drive for writing.In addition,there are other forms of feedback,such as peerfeedback,comments and face-to-face discussions.The students are required to act on the feedback totheir own advantage.It has been proved that the proposed correcting method is time-saving,chal-lenging and efficient.
文摘To be a good headteacher of the vocational and technical school,he should face the principle that we focus on the education of morals and thoughts and make a good model for the students by ourselves.Secondly,we should take good care of them,respect them and understand them.Thirdly,we should make good use of the class committee.
