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Controllable dispersion and reunion of liquid metal droplets

Science China Materials 2019年第3期62卷 407-415页

作者： Sen Chen Yujie Ding Qinglei Zhang Lei Wang Jing Liu Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Department of Biomedical Engineering School of MedicineTsinghua UniversityBeijing 100084China

Liquid metal(LM) micro-droplets have been widely used in microfluidics, drug-loaded nano-system and micro-nano machine due to its excellent properties. However,there still exist difficulties in succinctly dispersing a bulk of LM into micro-droplets due to the large interfacial ***, the controllable switching between droplet dispersion and reunion is yet to be realized. Herein, a practical and efficient method for dispersing LM was proposed and the controllable switching between dispersion and reunion of LM droplets was achieved. LM micro-droplets were produced by vibrating the LM immersed in a mixture of N,N-dimethylformamide(DMF) and polyvinyl chloride(PVC). The experimental results show that the size distribution of LM micro-droplets could be tuned by controlling the vibration frequency. More intriguingly, the dispersion and reunion of LM droplets can be switched intelligently through tuning the vibration frequency and amplitude. Furthermore, optical properties of the LM micro-droplet coating were evaluated to display potential applications. A self-driven motion of PVCcoated LM could be achieved by utilizing the produced LM micro-droplets based on the Marangoni effect, which holds promising value for developing future transport tool of LM droplets. The present work suggests an entirely feasible method for dispersing and utilizing LM droplets, which is of great significance for promoting the development of LM micro-droplet science and technology.

关键词： liquid metal micro-droplet dispersion and reunion self-driven motion optical property

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Transcatheter Aortic Valve Implantation: Experience of Sainte Clotilde Hospital in reunion Island

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World Journal of Cardiovascular Diseases 2019年第10期9卷 772-780页

作者： Adam Ahamat Ali Christophe Pouillot Geoffrey Rambaud Cardiology Department Renaissance Hospital of N’Djamena City N’Djamena Chad Faculty of Human Health Sciences of N’Djamena City N’Djamena Chad Cardiology Department Sainte Clotilde Hospital Reunion Island France

Introduction: Degenerative aortic stenosis is the most common valvulopathy in developed countries. The implantation of a percutaneous aortic valve (TAVI) has taken an important place in the management of this valvulopathy. The objective of this work is to report the results of patients treated by TAVI by the team of Sainte Clotilde Hospital (reunion Island). Patients and?Methods: This was a descriptive retrospective study conducted from 01/10/2014?to 01/10/ 2017 in the Sainte Clotilde Hospital, reunion Island. All patients who received TAVI for degenerative aortic stenosis were included in the study. Follow-up was completed until 31/08/19. Results: Forty-six (46) patients were included (sex ratio 0.53). The age was 82 (±7.5). Respectively,?56.5%, 21.7% and 6.5% of patients were diabetic [n = 26 (56.5%)], severe renal impairment [n = 10 (21.7%)] and hemodialysis [n = 3 (6.5%)]. All procedures were performed by femoral route under consious sedation. Edwards’ prostheses were used more often (93%), 100% Sapien 3, 6% of which were size 23. The primary success rate was 97.8% and the failure rate was 2% (deaths per procedure). The TAVI range of 0.66 ± 0.14 and 46.8 ± 15.5 against 1.48 ± 4.3 and 13.8 ± 5 in post TAVI. Severe pulmonary arterial?hypertension (>60 mmHg) was observed in 21.7% of pre-TAVI patients?compared to 4% in post TAVI patients. The overall rate of complications was 17% (n = 8). They were related to conductive disorders [6.5% (n = 3)], paraprosthetic leakage [2% (n = 1)], tamponade [2% (n = 1)], and hemorrhagic complications [6.5% (n = 3)]. Mean follow-up was 946 days (median = 1007.5 days), mean follow-up death rate was 30.4% (n = 14). The causes of death were non-cardiac in 57% (n = 8) of the cases. Conclusion: The TAVI results of the Sainte Clotilde Hospital Clinic are comparable to those observed in the literature.

关键词： Calcified Aortic Stenosis Percutaneous Valve Replacement Sainte Clotilde Hospital reunion Island

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Clinical Case: Place of Cardiac Stimulation in Asymptomatic Significant Chronic Aortic Insufficiency Associated with Sinus Dysfunction

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World Journal of Cardiovascular Diseases 2019年第9期9卷 621-627页

作者： Adam Ahamat Ali Christophe Geyer Renaissance Hospital of N’Djamena N’Djamena Chad The Faculty of Human Health Sciences of N’Djamena N’Djamena Chad Sainte Clotilde Clinical Cardiology Service Reunion Island

The association between aortic insufficiency and sinus dysfunction is rare. We reported a case of significant chronic degenerative aortic insufficiency associated with sinus dysfunction. This was a 66-year-old patient on follow-up for asymptomatic chronic aortic insufficiency who was referred to us for a preoperative invasive hemodynamic assessment. The indication for surgery was based on the left ventricular dilation criteria. The echocardiography and cardiac catheterization showed a disappearance between the aortic insufficiency and the left ventricular repercussion. Upon discovery of the sinus bradycardia, the patient received a single chamber pacemaker set at a base rate of 70 seconds in AAIR at first and then the patient was measured remotely. At five months, cardiac pacing resulted in a significant reduction in the left ventricular diameter and volume on the echocardiography and magnetic resonance imaging;therefore surgery was postponed.

关键词： Aortic Insufficiency Sinus Dysfunction Cardiac Stimulation Sainte Clotilde Clinic reunion Island

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CHINESE CULTURE SHINES IN MYANMAR

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China Report ASEAN 2019年第2期4卷 64-65页

作者： Pan Yingqiu 不详

The eve of the Chinese New Year (February 4 this year) marks a time for family reunion and celebration. Chinese people around the world celebrate it in a variety of ways. In neighboring Myanmar, a Chinese New Year gala titled A Happy Family – China-Myanmar Friendship aired on the eve this year on Myanmar National TV and Skynet, starring performers from both countries.

关键词： Chinese New Year family reunion celebration

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Graduation Season

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天天爱英语 2019年第7期 39-39页

作者：孙殿坤王秋敏(指导) 黑龙江省大庆市湖滨学校不详

The flowers bloomed, and withered again. The birds came, and flew away again. My primary school life is coming to an end. Suddenly I feel very sad. I can still remember a lot of things quite clearly, as if they happened yesterday. I won't forget the sound of my classmates reading in the classroom. I won't forget the figure of my classmates jumping and running on the ***, let's cherish this last time together, smile, and say goodbye. I believe we part so that we can have a happy reunion.

关键词： flowers bloomed birds happy reunion

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