Purpose:.To compare the education effect of video demonstrations and conventional teaching on the prevention and control of myopia.Methods:.Eighty students were randomly divided into an experimental(n=40) and a contro...Purpose:.To compare the education effect of video demonstrations and conventional teaching on the prevention and control of myopia.Methods:.Eighty students were randomly divided into an experimental(n=40) and a control(n=40) group,.and each group was split into two classes of 40 students..The students in the experimental group attended classes mainly based on video demonstration and those in the control group received conventional teaching..All students then undertook a test and the examination scores were statistically compared between the two groups.Results:.The educational background,.age,.and gender did not differ between the two groups(all P >0.05). The experimental group had a mean test score of 8.25±1.45,.which was slightly lower than the mean of 8.58±1.11 in the control group,but the difference was not statistically significant(t=-1.589,P=0.114).Conclusion:.The educational effect of video demonstrations was almost identical to that of traditional teaching..In addition,.video classes reduced the training time and financial costs,.indicating that they deserve widespread application.展开更多
In this study, a rapid molecular identification method of Tribolium destructor was established with PCR and PCR-RFLP （polymerase chain reaction-restriction fragment length polymorphism） technology. According to the ...In this study, a rapid molecular identification method of Tribolium destructor was established with PCR and PCR-RFLP （polymerase chain reaction-restriction fragment length polymorphism） technology. According to the results, （ 1 ） with PCR method, specific primers were designed based on CO1 gene of T. destructor for PCR amplification, and electrophoresis detection confirmed that PCR method could be used to rapidly and accurately identify T. destructor; （2） with PCR-RFLP method, two pairs of degenerate primers were used to amplify CO1 gene of Tribolium species, PCR products were digested with HindIII and detected by electrophoresis, results indicated that PCR-RFLP method could also be used for rapid identification of T. destructor in quarantine practice.展开更多
基金Science and Technology Plan Program of Guangzhou(Special fund for science popularizationGrant:2013KP084)
文摘Purpose:.To compare the education effect of video demonstrations and conventional teaching on the prevention and control of myopia.Methods:.Eighty students were randomly divided into an experimental(n=40) and a control(n=40) group,.and each group was split into two classes of 40 students..The students in the experimental group attended classes mainly based on video demonstration and those in the control group received conventional teaching..All students then undertook a test and the examination scores were statistically compared between the two groups.Results:.The educational background,.age,.and gender did not differ between the two groups(all P >0.05). The experimental group had a mean test score of 8.25±1.45,.which was slightly lower than the mean of 8.58±1.11 in the control group,but the difference was not statistically significant(t=-1.589,P=0.114).Conclusion:.The educational effect of video demonstrations was almost identical to that of traditional teaching..In addition,.video classes reduced the training time and financial costs,.indicating that they deserve widespread application.
基金Supported by Science and Technology Project of Jiangsu Entry and Exit Inspection and Quarantine Bureau(2010KJ06)
文摘In this study, a rapid molecular identification method of Tribolium destructor was established with PCR and PCR-RFLP （polymerase chain reaction-restriction fragment length polymorphism） technology. According to the results, （ 1 ） with PCR method, specific primers were designed based on CO1 gene of T. destructor for PCR amplification, and electrophoresis detection confirmed that PCR method could be used to rapidly and accurately identify T. destructor; （2） with PCR-RFLP method, two pairs of degenerate primers were used to amplify CO1 gene of Tribolium species, PCR products were digested with HindIII and detected by electrophoresis, results indicated that PCR-RFLP method could also be used for rapid identification of T. destructor in quarantine practice.
