Objective To screen the presciption of Blumea gynecological lotion and investigate the inhibitory effect through inhibition rate test; To provide a basis for clinical application. Methods Consumption of Tween-80, SLES, hydrogenated castor oil (RH-40), and clarity of the solution were selected as the evaluation indexes to optimize the solubilizing agents. By using the filter paper method and the inhibition zone size as the evaluation index, the antimicrobial effect on Staphylococcus aureus. Escherichia coli and Candida albicans was studied to screen the best antibacterial agent from 2 g/L GM-BP, 2 mL/L PHMB, 2 mL/L A.SAP. With Blumeapowder dissolution percentage as the evaluation index, orthogonal test was used to screen additives in the lotion. Finally, the bacteriostasis effect and stability of the obtained lotion were investigated in vitro. Results The order of solubilizing effect was RH-40>SLES>Tween-80, and that of inhibition zone size was PHMB>A.SAP>GM-BP. The best prescription as follows:0.6 mg/mL Blumea powder, 0.04 g/mL SLES, 0.01 g/mL CAB-35, 10% propylene glycol. Bacteriostatic rates of Blumea gynecology lotion sample were more than 90%, and bacteriostatic rates remained more than 80% after 3 months. Conclusion The prescription of Blumea gynecology lotion is reasonable and practicable, with simple preparation process, available materials and good inhibitory effect and stability.

Pharmacological studies have shown that Bruceae Fructus has unique antitumous effects, which has broad market prospects. In recent years, the demand of Bruceae Fructus has increased year by year. Production and marketing thrive, and prices continue to rise. Therefore, it has become one of the Chinese medicinal herbs with antitumour effects that obtained people’s attention. This author summarized the dynamic condition of production and marketing of Bruceae Fructus during the last 10 years, and analyzed the major reasons for price changes and forecast development tendency so as to provide references for the reasonable layout of production and marketing of Bruceae Fructus.

Objective This article seeks to apply root cause analysis (RCA) to identify the fundamental cause of low hand hygiene compliance among medical personnel, and try to evaluate the effect of interventions. Methods Using RCA method to analyze the direct cause of hand hygiene compliance among medical personnel ,and then find out the root cause of it. It's expected that the hand hygiene compliance of medical personnel shall be improved through pro-posed interventions. Results After the intervenetions,the rate of hand hygiene compliance from 25.73% to 42.79%(P<0.01). Comparison with the actual rates of WHO five times hand washing, there were notable differences(P<0.05) in observation ofcontacting patient beforehand, contacting patient afterwards and prior to aseptic operations through three interventions. In fact, there were no differences between contacting the patients' blood and body fluids and contacting the patients'surroundings afterwards. Conclusion Using RCA methods to search for the root cause of low hand hygiene compliances among medical personnel. Through proposed interventions,hand hygiene compliances of medical personnel could be enormously improved.

Blumea balsamifera resource is an important material foundation for the breeding,quality identification,genetic research,biotechnology research and agricultural production.It is also the material basis for sustainable development of Blumea balsamifera.In this paper,we reviewed the related research on Blumea balsamifera resources in China,and discussed existing problems of Blumea balsamifera resources,and put forward some suggestions on key research direction in the future,for peer reference and discussion in use and further study promotion of Blumea balsamifera resources.

Catalase is widely used in the food, medical, and textile industries. It possesses exceptional properties including high catalytic efficiency, high specificity, and environmental friendliness. Free catalase cannot be recycled and reused in industry, resulting in a costly industrial biotransformation process if catalase is used as a core ingredient. Developing a simple, mild, cost-effective, and environmentally friendly approach to immobilize catalase is anticipated to improve its utilization efficiency and enzymatic performance. In this study, the catalase KatA derived from Bacillus subtilis 168 was expressed in Escherichia coli. Following separation and purification, the purified enzyme was prepared as an immobilized enzyme in the form of enzyme-inorganic hybrid nanoflowers, and the enzymatic properties were investigated. The results indicated that the purified KatA was obtained through a three-step procedure that included ethanol precipitation, DEAE anion exchange chromatography, and hydrophobic chromatography. Then, by optimizing the process parameters, a novel KatA/Ca₃(PO₄)₂ hybrid nanoflower was developed. The optimum reaction temperature of the free KatA was determined to be 35 ℃, the optimum reaction temperature of KatA/Ca₃(PO₄)₂ hybrid nanoflowers was 30-35 ℃, and the optimum reaction pH of both was 11.0. The free KatA and KatA/Ca₃(PO₄)₂ hybrid nanoflowers exhibited excellent stability at pH 4.0-11.0 and 25-50 ℃. The KatA/Ca₃(PO₄)₂ hybrid nanoflowers demonstrated increased storage stability than that of the free KatA, maintaining 82% of the original enzymatic activity after 14 d of storage at 4 ℃, whereas the free KatA has only 50% of the original enzymatic activity. In addition, after 5 catalytic reactions, the nanoflower still maintained 55% of its initial enzymatic activity, indicating that it has good operational stability. The K_m of the free KatA to the substrate hydrogen peroxide was (8.80±0.42) mmol/L, and the k_cat/K_m was (13 151.53± 299.19) L/(mmol·s). The K_m of the KatA/Ca₃(PO₄)₂ hybrid nanoflowers was (32.75±2.96) mmol/L, and the k_cat/K_m was (4 550.67±107.51) L/(mmol·s). Compared to the free KatA, the affinity of KatA/Ca₃(PO₄)₂ hybrid nanoflowers to the substrate hydrogen peroxide was decreased, and the catalytic efficiency was also decreased. In summary, this study developed KatA/Ca₃(PO₄)₂ hybrid nanoflowers using Ca²⁺ as a self-assembly inducer, which enhanced the enzymatic properties and will facilitate the environmentally friendly preparation and widespread application of immobilized catalase.
Catalase ; Nanostructures/chemistry* ; Hydrogen Peroxide/metabolism* ; Enzymes, Immobilized/chemistry* ; Catalysis

Objective: This study was devoted to identifying natural thrombin inhibitors from traditional Chinese medicine (TCM) and evaluating its biological activity in vitro and binding characteristics. Methods: A combination strategy containing molecular docking, thrombin inhibition assay, surface plasmon resonance (SPR) and molecular dynamics simulation were applied to verify the study result. Results: Gallic acid was confirmed as a direct thrombin inhibitor with IC

OBJECTIVE：To understand the current situation and existing problems of Blumea balsamifera industry in China ， and to provide reference for its sustainable development . METHODS ：With the keywords of “B. balsamifera ”“Ai Pian ”“Ai Fen ”， etc.，through the patent platform of SooPat and Baiten ，the patent data of B. balsamifera that had been published from Jan. 1989 to Dec. 2019 were collected. The International Patent Classification （IPC）was used to sort out and count the patent information of B. balsamifera，to understand the development status of B. balsamifera industry in technology and research field ，to analyze the existing problems and to explore the development trend of B. balsamifera industry in China so as to put forward corresponding suggestions. RESULTS & CONCLUSIONS：A total of 690 patents related to B. balsamifera were collected ，mainly invention patents，of which the authorization rate was 27.39％，the effective rate was 17.97％，and the failure rate was 55.22％. Top 10 applicants with the largest number of applications had a total of 165 applications，accounting for 23.91％ of the total number of applications. Top 10 applicants were 4 enterprises，3 natural persons and 3 colleges and universities. The patents of B. balsamifera were mainly distributed in Guizhou ，Shandong，Anhui，Guangdong，Guangxi and Hainan ，accounting for 81.01％ of the total patent applications of B. balsamifera . The patent technology field of B. balsamifera had expanded from traditional Chinese medicine to daily chemical products ，health care and physiotherapy and other daily consumer good fields. From the perspective of patent intensity，the number and quality of patent applications were not coordinated ，and there were many meaningless patent applications，and the conversion rate was low. It is suggested that China should strengthen the research on B. balsamifera and its more compatible medicinal materials ，promote the innovation ，development，transformation and upgrading of B. balsamifera industry；strengthen the systematic and in-depth research on B. balsamifera，improve the quality and conversion rate of patent xiexiaoli13@126.com technology，and revitalize the development of B. balsamifera industry； expand multi-party cooperation ， strengthen the E-mail：fulai.yu@163.com research on patent core technology ，build the strategic alliance of intellectual property rights of B. balsamifera industry，and realize the high quality development of B. balsamifera industry.

Objective To develop a novel transcatheter tricuspid valve replacement device and test its performance. Methods The transcatheter tricuspid valve stent consisted of double-layer self-expanding nitinol stent, biotissue-derived bovine pericardial leaflets, and PTFE woven. The delivery system, mainly consisting of a handle control unit and a delivery sheath, was sent to the correct position via right atrium or jugular vein. The sheath had a visualization feature, and the handle control unit could realize the functions of stable release and partial recovery of the interventional valve. In addition, this study performed animal survival experiments on the basis of in vitro experiments. A large-white pig was used as the experimental animal. Cardiopulmonary bypass was established through median thoracotomy, then the right atrium was opened, and the interventional valve was released under direct vision without cardiac arrest. Approximately 1 month after interventional valve implantation, the maneuverability and stability of the interventional tricuspid device were evaluated by autopsy. Results Through the animal experiment, the interventional valve was successfully released, and the anchoring was satisfactory. Postoperative transthoracic echocardiography showed that the interventional valve opened and closed well, the flow rate of tricuspid valve was 0.6 m/s, and there was no obvious tricuspid regurgitation. One month after the operation, we dissected the large-white pig and found the interventional valve was not deformed or displaced, the leaflets were well aligned, and there was thrombus attachment in the groove between the inner and outer layers of the interventional valve. Conclusion Animal experiment shows that the novel device can stably and firmly attach to the tricuspid annulus, with good anchoring effect, and effectively reduce paravalvular leakage.