1.Pharmacognostical identification of Chinese crude drug Fructus Schisandrae Sphenantherae
Jianping GAO ; Yanhan WANG ; Daofeng CHEN ;
Chinese Traditional and Herbal Drugs 1994;0(07):-
Object To provide a basis for the identification of the crude drug of Fructus Schisandrae Sphenantherae Methods Morpholgical characters and microstructural features of the seed surface of Schisandra sphenanthera Rehd. et Wils , S. rubriflora (Franch ) Rehd. et Wils., S. viridis A. C. Smith, and S. henryi Clarke were observed under light microscope and scanning electron microscope. Identification of them was also completed by TLC qualitative analysis for deoxyschisandrin and schisantherin A Results The fruits of S. sphenanthera, S. rubriflora, S. viridis and S. henryi could be classified to three types with the characters of micromorphological features of the seed surface. The results of TLC showed that deoxyschisandrin and schisantherin A were present in the fruits of S. sphenanthera from Pingli, Shaanxi, Luanchuan, Henan, Yangcheng, Shanxi, S. rubriflora and S.viridis, Hengshan Hunan Provinces The fruit of S. henryi contained a little quantity of schisantherin A, but the fruits of S. sphenanthera from Liuba Shaanxi and Xiaolongshan Gansu Provinces did not have deoxyschisandrin and schisantherin A. Conclusion The fruits of S. sphenanthera from different geographical origin, S. rubriflora, S. viridis and S. henryi can be identified by the characters of micromorphological featrues of the seed surface and the TLC qualitative analysis for deoxyschisandrin and schisantherin A
2.Determination of lignans of Schisandra rubriflora by HPLC
Yanhan WANG ; Jianping GAO ; Yunqiu YU ; Daofeng CHEN ;
Chinese Traditional and Herbal Drugs 1994;0(10):-
Object To determine the contents of schisantherin A, deoxyschizandrin, schisandrin B and schisandrin C in the stems and fruits of Schisandra rudriflora (Franch ) Rehd. et Wils , which were collected from different areas Methods An HPLC method was set up: Column, Sphereclone, ODS (250 mm?4 6 mm, 5 ?m); mobil phase, A: H 2O, B: MeOH; gradient elution was with 70% B from 0-4 min, 70%-100% B from 4-54 min; the flow rate was 0 4 mL/min; the column temperature was 25 ℃ and the DAD detector was used at 254 nm Results The contents of schisantherin A, deoxyschizandrin, schisandrin B and schisandrin C in S. rubriflora were 0.026%-0.083%, 0.007%-0.945%, 0.002%-0.121%, 0.010%-0.038%, respectively. Deoxyschizandrin exists widely in S. rubriflora and its content is higher in fruits than that in stems Conclusion Deoxyschizandrin is the main active lignan in the fruits of S rubriflora
3.Investigation into the advanced training status for emergency department nurses in Chongqing
Shaoyu MU ; Fuying LI ; Yanhan CHEN ; Manping GU ; Zhifen LI ; Jianrong ZHOU
Chinese Journal of Medical Education Research 2012;11(3):243-245
ObjectiveTo study the advanced training status for emergency department nurses in Chongqing,and to improve the training program.MethodsThe basic and professional information of 208 emergency department nurses who obtained advanced training for emergency nursing in the previous 5 years was analyzed and the self-designed Satisfaction Survey on Teaching and Self-evaluation on Training Outcome were applied to learn about the feedback of trainees.ResultsThe average age of trainees was ( 29.24 ± 5.44 ),among whom 65.86% with junior college education experience,49.51% with 2-5 years of working experience,50.48% at primary professional rank,61.53% from second level hospitals.Their average score ( 77.91 ± 7.69 ),and teaching satisfaction score was ( 87.01 ± 7.63 ).The survey indicated that self-evaluation on training outcome was significant to enhance emergency nursing knowledge and skills,while weak to improve research and managing capability.ConclusionNurses attending advanced training for emergency nursing are characterized with short working time,low professional ranks,jagged education experiences and various levels of hospital. It is suggested to adopt leveled training in accordance with education experience and working hospital of trainees,and to strengthen nursing research and team managing competencies.
4.Study on problems and countermeasures in bilingual English teaching for foreign-related nursing students
Yuerong LI ; Qinghua ZHAO ; Shaoyu MOU ; Zhifeng LI ; Yanhan CHEN ; Chuan SHA
Chinese Journal of Medical Education Research 2013;(6):622-625
Objective To investigate the current situation and problems of bilingual English teaching for students majored in foreign-related nursing and to explore its countermeasures.Methods Selfmade questionnaire survey was conducted anonymously among 69 undergraduate students majored in foreign-related nursing.Students' basic information,self-evaluation of English level,classroom interaction,evaluation and satisfaction of the curriculum,their conception of curriculum necessity,elective reasons,preferences of teaching methods and learning style,learning interest,as well as confidence in learning were investigated.Excel 2007 was used to do statistical analysis.Results 92.42% questionnaire was effectively recovered.It is suggested that this group of students' public English background was strong (90.16 % passed CET-4).Students have low sense of self-identity and lack of confidence in themselves (self-rated English:‘ very good' for 0%,‘ good' for 1.64%,‘ general' for 52.46%,‘ bad' for 39.34%,‘ very poor' for 6.56%).They knew the necessity of the curriculum clearly,but paid less attention to it (extracur-ricular professional English learning time of 68.85% was less than 30 minutes; 21.31% of them hardly took time to learn).There were significant differences in favorable proportion of English teaching among stu-dents,from less than 50% to 100% respectively.Poor speaking and listening ability and poor profes-sional vocabularies had negative impact on classroom interaction.Conclusions Faculty need to make efforts in inspiring students' interest of learning,improving students' English speaking and listening abilities as well as confidence cultivation and further explore curriculum planning.
5.Teaching thinking of Nursing Psychology from the perspective of narrative medicine
Hong CHEN ; Luodan FAN ; Yanhan YANG ; Yanan MO ; Hua YU
Chinese Journal of Medical Education Research 2022;21(2):223-227
Narrative medicine reform based on narrative pedagogy has became a development trend in foreign medical education,while domestic narrative pedagogy is still in the stage of exploration and development. In view of the problems existing in nursing psychology teaching, based on the new perspective of narrative medicine, on the basis of learning the practical experience of narrative pedagogy at home and abroad, this paper puts forward a new idea of narrative teaching reform of nursing psychology. We discuss and explore the reform of nursing psychology's narrative pedagogy from three aspects: collection and creation of narrative material resources, assisting narrative pedagogy with network platform, and constructing narrative pedagogy procedures in combination with reality.
6.A Research on the Changes of T2 time by MRI for Meniscus after Warm-up Exercise
Yanhan LIU ; Xiaojin ZHANG ; Jie CHEN ; Dong BAI
Journal of Medical Research 2017;46(9):146-150
Objective To prospectively evaluate changes in T2 relaxation times in the meniscus with warm-up excise using MRI in healthy knees,and explore the feasibility of evaluating the morphological changes of meniscus after acute warming-up by T2 time response.Methods A total of 40 healthy adult volunteers were enrolled,which included 15 males and 25 females;aged 22-30 years old with mean age of 26.32 ± 2.1.T2 mapping sequential imaging was performed to measure the T2 time of medial and lateral anterior,body,posterior before and after warm-up exercise.A paired Student's t test was used to determine the effects of warm-up exercise on T2 times.Results All volunteers showed a significant increase in T2 values after warm-up exercise in all meniscus compartments (P =0.000),which may indicate changes in the biochemical composition of meniscal tissue.The lateral body compartment experienced more increment than medial anterior (P < 0.05),medial posterior (P < 0.05) and lateral posterior parts (P < 0.05) after warm-up exercise.Conclusion Longer T2 values after warm-up exercise suggest increment in the water content of knee meniscus,which may indicate improvements in the physiological activity and protection of meniscus.T2 values in menisci have the potential to be used as biomarkers for identifying meniscus changes after exercise.
7.Exploration on the experience of long-term external normothermic machine perfusion of discarded human kidney for the first time in China
Yang HUANG ; Shuangjin YU ; Haiwei CHEN ; Guobin WU ; Fangze QI ; Yanhan LIU ; Yuying YANG ; Tong CHEN ; Hehuan RUAN ; Tao ZHANG ; Honghui CHEN ; Chuanbao CHEN ; Qiang ZHAO ; Zhiyong GUO ; Guodong CHEN ; Jiang QIU ; Xiaoshun HE
Chinese Journal of Nephrology 2022;38(4):329-335
Objective:To explore the long-term preservation value and repair effect of normothermic machine perfusion (NMP) on clinically discarded kidneys.Methods:A case of clinical discarded donor kidney was collected, and NMP was carried out in vitro for 9 hours with recovered blood. The dynamic changes of renal appearance, blood gas and biochemistry analysis of perfusate and renal pathology were recorded. Results:In the second to fifth hour of NMP, the appearance of renal was pink and ex vivo normothermic perfusion assessment score (EVNP) was grade Ⅰ. While, the sixth hour and beyond of NMP, the appearance of kidney turned to dark red and EVNP was grade Ⅲ. The renal perfusion blood flow maintained above 150 ml/min in the first 6 hours and decreased significantly after that, and at the end, was only 50 ml/min. During the whole process of perfusion, urine output was maintained at about 100 ml/h. PO 2 remained above 100 mmHg in the first 5 hours of perfusion and from the 6th hour, was lower than 80 mmHg and continued to decline, and was close to 0 at the end of perfusion. The results showed that although the K + concentration changes in blood and urine in the first 5 hours of NMP had a good consistency, the lactic acid level had been rising. In addition, there was no significant change in the histopathology at the fourth hour of perfusion compared with that before zero-point puncture, and the fibrinous thrombus in glomeruli was improved compared with that before perfusion. However, at the sixth hour after perfusion and before the end of perfusion, the pathological changes of renal tissue were significantly worse. There were a large of thrombosis in glomerular blood vessels, renal tubular atrophy and acute tubular necrosis. Conclusions:NMP can realize the evaluation of extended criteria donors before transplantation, and it proves the feasibility and repair potential of NMP in kidney to a certain extent. At the same time, NMP also provides a new way to expand the source of donor kidney and to pre-treat organ in vitro.