Objective: To establish a quantitative determination method for β-eudesmol in Cortex Magnoliae Officinalis by GC. Methods:β-Phenethanol was used as the internal standard substance;the column was a Zebron ZB-WAX capillary column ( 60 m × 320 μm,0. 5μm) with the column temperature of 200℃;the detector was FID and the vaporizer temperature was 250℃; the carrier gas was nitrogen with the flow rate of 1. 3 ml · min-1 and the split ratio was 4 ∶1. Results: The linear range of β-eudesmol was 0. 015 1-0. 271 2 mg·ml-1(r=0. 999 8);the average recovery was 99. 28%(RSD =1. 17%, n=6). Conclusion:The method is simple and accurate with good reproducibility, which can be used for the quality control of medicinal materials and decoction pieces of Cortex Magnoliae Officinalis.

Objective:To evaluate the quality of Dendrobii officinalis Caulis cultivated in Lishui by the content determination of ex-tract, polysaccharide and mannose. Methods:Totally 26 batches of Dendrobii officinalis Caulis were dried at 55℃, and the ethanol ex-tract, polysaccharide and mannose was determined respectively by hot dipping, phenol-sulphuric acid colorimetry and pre-column deri-vatization HPLC method according to the determination methods for Dendrobii officinalis Caulis recorded in Chinese Pharmacopoeia (2010 edition). Results:The contents of extract, polysaccharide and mannose in Dendrobii officinalis Caulis during the collection pe-riod were higher than those of the pharmacopoeia standard, and there were significant differences among the batches. Conclusion:The test can provide theory basis for the quality evaluation of Dendrobii officinalis Caulis cultivated in Lishui, and provide guidance for the planting of the herb.

Purpose To compare the pathological differences between cervical high-grade intraepithelial lesions (CHGIL) positive resection surgical margin after cold knife conization and total hysterectomy,and to explore how to take further clinical treatment measures.Methods The pathologic results of 74 patients with CHGIL positive surgical margin after cold knife conization and hysterectomy were analyzed retrospectively.Results There was a correlation between positive cervical incision margin and residual uterine lesion (P ＜ 0.01).Age,menopause status,gland involvement did not related to residual uterine lesions(P ＞ 0.05).There was significant correlation between the lesion-related quadrant and the residual rate of uterine lesion (P ＜ 0.01).Conclusion Cold knife conization and hysterectomy are safe and effective treatments for CHGIL.However,for the positive resection surgical margin after cold knife conization cases,hysterectomy should be carefully chosen and may choose conservative treatment or re-cone cutting.

In order to understand the current status of the knowledge, attitude and practice (KAP) about prevention and control of COVID -19 in college students, and to provide theoretical basis for prevention and control work in college campus. This study investigated the KAP of COVID -19 of 1 847 college students in Shaanxi province by questionnaire using the convenience sampling method. Chisquare test and multivariate logistic regression analysis were used to analyze the influencing factors for the KAP of COVID -19. The results demonstrated that 48.3% of the students had a higher knowledge level of COVID -19, 11.7% had a fear attitude and 39.6% had good protective practices. Logistic regression results showed that female and urban household college students had higher cognitive level of COVID -19. The college students with anxiety state were more likely to have fear attitude. Students of female, urban household, anxiety, higher cognition and fear attitude showed better protective practices. The above results indicated that the knowledge level of COVID -19 in college students are not enough, and the attitude and protective practices need to be further improved. Therefore, relevant departments should follow the rules of KAP, carry out targeted propaganda and education on COVID -19 for college students, to improve their ability to cope with public health emergencies.

In order to understand the current status of the knowledge, attitude and practice (KAP) about prevention and control of COVID -19 in college students, and to provide theoretical basis for prevention and control work in college campus. This study investigated the KAP of COVID -19 of 1 847 college students in Shaanxi province by questionnaire using the convenience sampling method. Chisquare test and multivariate logistic regression analysis were used to analyze the influencing factors for the KAP of COVID -19. The results demonstrated that 48.3% of the students had a higher knowledge level of COVID -19, 11.7% had a fear attitude and 39.6% had good protective practices. Logistic regression results showed that female and urban household college students had higher cognitive level of COVID -19. The college students with anxiety state were more likely to have fear attitude. Students of female, urban household, anxiety, higher cognition and fear attitude showed better protective practices. The above results indicated that the knowledge level of COVID -19 in college students are not enough, and the attitude and protective practices need to be further improved. Therefore, relevant departments should follow the rules of KAP, carry out targeted propaganda and education on COVID -19 for college students, to improve their ability to cope with public health emergencies.