ABSTRACT
The effect of cognition need on information seeking behaviors of information users and the difference in behaviors of information users were investigated in 184 undergraduates from the same grade with different back-grounds of subjects using the cognition need scale and undergraduates information-seeking behaviors scale ,respec-tively.The data were analyzed by descriptive statistical analysis, correlation analysis, rank test, and multivariate linear regression analysis , respectively , showing that the cognition need is significantly correlated with the informa-tion seeking behaviors of undergraduates in terms of information evaluation, information searching, information management and information use .
ABSTRACT
OBJECTIVE:To establish a method for the content determination of total flavonoids in onion extracts.METH_ ODS:UV spectrophotometry was adopted in the determination with the detection wavelength set at270nm.RESULTS:Good linear relationship with the absorbability was achieved when the detection concentration of eldrin was within a range of0.002～0.01mg/ml(r=0.9978),the average recovery was99.15%(RSD=1.52%).CONCLUSION:This method was simple,rapid and accurate.
ABSTRACT
OBJECTIVE To establish a quality standard for Liyan granule.METHODS Honeysukle flower in the granule was identified by TLC.The developing agent was the upper solvent of butyl acetate formil acid-water(7∶2.5∶2.5).The dual wavelength spectrophotometry was applied for the determination of chlorogenic acid in granule.And the acute toxicity test was accomplished.RESULT The TLC for the identification of Honeysule flower in the granule was accurate.The uv for chlorogenic acid was reliable.The linear range of chlorogenic acid was 0.46～46.00 μg*mL-1(r=0.9992),and the recovery was 97.33%,RSD=1.49%.The acute toxicity test showed that the maximal tolerable dose in rats was equivalent to 850 times of the clinical dosage in human.CONCLUSION This method could be used as the quality control during the production of Liyan granule.
ABSTRACT
OBJECTIVE:To find the optimal suspending agent for compound sulfur lotion METHODS:The stability of compound sulfur lotions with different suspending agents was studied dynamically and rheologically RESULTS:Gum tragacanth had a satisfactory suspending effect with thixotropy Bentonite improved the stability of preparation but the thixotropy was changed The suspending property of bentonite was increased in combined use with benzalkonium bromide CONCLUSIO_N:Gum tragacanth and bentonite in combination with benzalkonium bromide are the suitable suspending agents for compound sulfur lotion