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Applied Biofloc Technology for target Species in the Mekong Delta in Vietnam： A Review

Journal of Environmental Science and Engineering(B) 2017年第4期6卷 165-175页

作者： Nguyen van Hoa ta van phuong Tran Ngoc Hai Chau tai tao Le Quoc Viet Nguyen Thi Hong van Huynh Thanh Toi Tran Huu Le Vo Nam Son Pham Quoc Anh Duy College of Aquaculture and Fisheries (CAF) Cantho University Cantho 270000-910000 Vietnam College of Applied Biology Tay Do University Cantho 270000-910000 Vietnam

BFT （Biofloc Technology） has been currently applied in Cantho University to a number of targeted species from fresh-to marine and saline water species in the Mekong Delta, e.g. striped catfish （Pangasianodon hypophthalmus）, white leg shrimp （Litopenaeus vannamei）, tiger shrimp （Penaeus monodon） and Artemia Vinhchau strain （Artemia franciscana） for both in the lab-scales or production scales. The best growth and survival rate of striped catfish was obtained in 6%o. For white leg shrimp, the results indicated：（1） C （Carbon） source e.g. rice-flour or molasses supplementary based on the feed provided to promote survival, growth and shrimp biomass harvested; （2） it was fed less than 20% as usual but showed similar to those in the control; （3） combination of rice-flour and molasses at a ratio of 70：30 by weight of C and N （Nitrogen） in a ration of 15：1 enhanced shrimp survival and growth; （4） in intensive culture, shrimp could be against the infection of disease and end up with higher survival, growth in earthen ponds. For tiger shrimp, a set up for larvae till post larvae at different ratios of C and N and C：N of 30 PLI5 displayed with better survival rate （49.73 ± 7.07%） and production （74,596 ± 10.608 PL/m3）. Artemiafranciscana was set up at C：N = 10：1 and salinities from 35, 60, 80 and 100 ppt. After two weeks, there were no significant difference among treatment and the control （without biofloc） in term of survival and growth. Moreover, total embryos per female was not significant different with the control and even the number of embryos as cysts tended to be higher. BFT displayed its advantages when applied on culture system of different targeted species and there is no doubt that it could help to sustain aquaculture and save environment in the Mekong Delta in near future.

关键词： Biofloc techology striped catfish white leg shrimp tiger shrimp Artemia Vinhchau strain.

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Antibiofilm activity of a-mangostin extracted from Garcinia mangostana L. against Staphylococcus aureus

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Asian Pacific Journal of Tropical Medicine 2017年第12期10卷 1154-1160页

作者： Nguyen Thi Mai phuong Ngo van Quang ta Thu Mai Nguyen Vu Anh Chutima Kuhakarn Vichai Reutrakul Albert Bolhuis Institute of Biotechnology Vietnam Academy of Science and Technology18 Hoang Quoc Viet RoadHanoiViet Nam Graduate University of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc Viet RoadHanoiViet Nam Institute of Chemistry Vietnam Academy of Science and Technology18 Hoang Quoc Viet RoadHanoiViet Nam Center of Excellence for Innovation in Chemistry and Department of Chemistry Faculty of ScienceMahidol UniversityRama 6 RoadBangkok 10400Thailand Department of Pharmacy and Pharmacology University of BathClaverton Down BathBA2 7AYBathUK

Objective: To isolate a-mangostin(AMG) from the peels of mangosteen(Garcinia mangostana L.), grown in Vietnam, and to investigate antibiofilm activity of this compound against three Staphylococcus aureus(S. aureus) strains, one of which was methicillin-resistant S. aureus(MRSA) and the other two strains were methicillinsensitive S. aureus(MSSA).Methods: AMG in n-hexane fraction was isolated on a silica gel column and chemically analyzed by HPLC and NMR. The antibiofilm activity of this compound was investigated by using a 96-well plate model for the formation of biofilms. Biofilm biomass was quantified using crystal violet. The viability of cells was observed under confocal microscopy using LIVE/DEAD Bac Light stains. Biofilm composition was determined using specific chemical and enzyme tests for polysaccharide, protein and DNA. Membranedamaging activity was assayed by measuring the hemolysis of human red blood cells in presence of ***: The results indicated that the isolated AMG, with a purity that exceeded 98%,had minimal inhibitory concentrations in the range of 4.6–9.2 mmol/L for the three strains tested. Interestingly, the MSSA strains were more sensitive to AMG than the MRSA strain. Minimal bactericidal concentrations were 2-fold higher than the minimal inhibitory concentration values for the three strains, indicating that AMG was a bactericidal compound. AMG also prevented biofilm formation effectively, albeit that again the MRSA strain was the most resistant. Interestingly, biofilms of the MRSA strain contained protein as a main component of the extracellular matrix, whereas this was polysaccharide in the MSSA strains. This might relate to the resistance of the MRSA 252 strain to *** using human red blood cells indicated that AMG caused significant membrane damage with 50% of cell lysis occurred at concentration of about 36 mmol/***: Our results provide evidence that the isolated AMG has inhibitory activity against biofilm formation

关键词： α-Mangostin Garcinia mangostana Biofilms Methicillin resistance Staphylococcus aureus

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越南跨境数据流动规则研究

越南跨境数据流动规则研究

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作者： ta THI MINH phuong 西南政法大学

学位级别：硕士

目前,全球数据跨境流动情况显示亚洲是全球最具活力的地区,其中越南已成为跨境数据流动的突出国家。越南具有高度贸易开放的经济体以及越来越多企业和个人积极参与全球数字环境,这反映了越南的潜力和机遇的趋势,但也对越南带来很多挑战... 详细信息

目前,全球数据跨境流动情况显示亚洲是全球最具活力的地区,其中越南已成为跨境数据流动的突出国家。越南具有高度贸易开放的经济体以及越来越多企业和个人积极参与全球数字环境,这反映了越南的潜力和机遇的趋势,但也对越南带来很多挑战。其中归纳为四个立法问题:第一是网络安全、第二是个人隐私保护、第三是保护国内产业的数据本地化政策、第四是国际合作和国家执法。从以上所述的四个挑战启发,本论文对越南数据跨境流动规则的论题进行研究。本论文的思路是先介绍越南数据监管的机构和法律体系;然后分析越南跨境数据流动规则中的国家信息安全及个人隐私保护的问题;再按照越南数据流动到境外去这流程,将其分成两个步骤来研究:第一步骤是关于在越南境内收集处理数据的规则,数据收集处理的条件以及各方权利和义务如何;第二步骤涉及到将在境内已收集的数据传输到在境外的第三方,也研究数据出境条件以及各方的责任和义务。跨境数据流动的含义不仅仅是数据出境,它还包含了数据入境。因此本论文进一步研究外国企业向越南境内客户提供跨境数据服务的数据本地化规则。在研究的过程中,笔者将越南跨境数据流动规则与欧盟《通用数据保护条例》(以下简称‘GDPR’)和中国法律中的跨境数据流动规则进行对比,从而找出越南法律不足之处并提出建议完善越南立法、以符合《区域全面经济伙伴关系协定》(以下简称‘RCEP’),使得数据跨境流动领域的国际合作关系更加和谐地持续。

关键词：跨境数据流动网络信息安全个人隐私保护数据本地化

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越南东北部Cat Ba岛泥盆系-石炭系过渡层的初探(英文)

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地球学报 2012年第S1期33卷 38-38页

作者： Toshifumi KOMATSU Reishi taKASHIMA ta Hoa phuong Tran Huyen DANG Duc Phong NGUYEN Huu Hung NGUYEN Satoru KATO Kento HIRAta takumi MAEKAWA Graduate School of Science and Technology Kumamoto UniversityKumamoto 806-8555Japan The Center for Academic Resources and Archives Tohoku University Museum Tohoku UniversityAramaki Aza Aoba 6-3Aoba-kuSendai 980-8578Japan College of Sciences Vietnam National University334 Nguyen TraiThanh XuanHanoi Vietnam Vietnam Institute of Geosciences and Mineral Resources(VIGMR) HanoiVietnam Vietnam National Museum of Nature(VNMN) HanoiVietnam

The Pho Han Formation is exposed on southern Cat Ba Island,Hai Phong Province in northeastern Vietnam,and intercalates the Devonian and Carboniferous(D-C) boundary(ta and Doan,2007;Komatsu et al.,2012).The D-C boundar... 详细信息

关键词： D-C boundary Conodont δ13C Cat Ba Island Vietnam

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