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Defect engineering of water-dispersible g-C_(3)N_(4) photocatalysts by chemical oxidative etching of bulk g-C_(3)N_(4) prepared in different calcination atmospheres

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Journal of Materials Science & Technology 2022年第8期103卷 232-243页

作者： Thi Kim Anh Nguyen Thanh-Truc pham Bolormaa Gendensuren Eun-Suok Oh Eun Woo Shin School of Chemical Engineering University of UlsanDaehakro 93Ulsan 44610South Korea Department of Material Technology Faculty of Applied ScienceHo Chi Minh City University of Technology and Education(HCMUTE)No.1 Vo Van Ngan StreetLinh Chieu WardThu Duc DistrictHo Chi Minh City 700000Viet Nam

In this study,water-dispersible graphitic carbon nitride(g-C_(3)N_(4))photocatalysts were successively prepared through the chemically oxidative etching of bulk g-C_(3)N_(4) that was polymerized thermally in different calcination atmospheres such as air,CO_(2),and N_(2).The different calcination atmospheres directly influenced the physicochemical and optical properties of both bulk and water-dispersible g-C_(3)N_(4),changing the photocatalytic degradation behavior of methylene blue(MB)and tetracycline hydrochloride(TCHCl)for water-dispersible g-C_(3)N_(4).The bubble-burst process in the thermal polymerization of thiourea produced defective edges containing C=O groups that preferred substituting the C-NHx groups over bulk g-C_(3)N_(4).In the oxygen-free N_(2) atmosphere among the different calcination atmospheres,more C=O functional groups were generated on the defective edges of bulk g-C_(3)N_(4),resulting in the highest N vacancy of the tri-s-triazine *** the successive chemical oxidation,S-or O-containing functional groups were introduced onto water-dispersible g-C_(3)N_(4).The water-dispersible g-C_(3)N_(4) photocatalyst from the oxygen-free N_(2) atmosphere(NTw)contained the most O-and S-functional groups on the g-C_(3)N_(4) ***,NTw exhibited the highest photocatalytic activity in the MB and TC-HCl photodegradation because of its slowest recombination process,which was ascribed to the unique surface properties of NTw such as abundant functional groups on the defective edges and N-deficient property.

关键词： g-C_(3)N_(4) Water-dispersible photocatalyst Calcination atmosphere Charge separation Chemically oxidative etching Defect edges

Induction of Anthracnose Disease Resistance on Chili Fruit by Treatment of Oligochitosan—Nanosilica Hybrid Material

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Agricultural Sciences 2017年第10期8卷 1105-1113页

作者： pham Dinh Dzung Le Thanh Hung Le Si ngoc Hoang Dac Hiet Bui Van Le Nguyen Tien Thang Dang Van Phu Nguyen ngoc Duy Nguyen Quoc Hien Research and Development Center for Hi-Tech Agriculture Ho Chi Minh City Vietnam Graduate University of Science and Technology Vietnam Academy of Science and Technology Hanoi Vietnam University of Science Vietnam National University Ho Chi Minh City Vietnam Research and Development Center for Radiation Technology Vietnam Atomic Energy Institute Ho Chi Minh City Vietnam

Oligochitosan (OC) with molecular weight Mw of 5000 g/mol was prepared by gamma Co-60 ray irradiation of chitosan solution. Nanosilica (nSiO2) with the size of 10 - 30 nm was synthesized by calcination of acid treated rice husk. The mixture of 1% OC - 1% nSiO2 was prepared by dispersion of nSiO2 in OC solution. The morphology of nSiO2 in the mixture of OC-nSiO2 was measured from images of transmission electron microscopy (TEM). The effect of foliar application of the mixture of OC-nSiO2 on the induction of resistance against anthracnose disease caused by Colletotrichum gloeosporioides fungus on chili fruits was investigated. Results indicated that foliar application of OC-nSiO2 with the concentration of 60 mg/l - 60 mg/l was found to be as the optimal treatment that reduced the disease severity on chili fruits to 22.2% compared with 90.0% of the control. Thus, OC-nSiO2 hybrid material could be considered as an effective biotic elicitor to prevent anthracnose disease infection for chili fruits. Furthermore, the prepared OC-nSiO2 hybrid material can also be used as an environmentally friendly agrochemical product for sustainable development of agriculture.

关键词： Oligochitosan Nanosilica Chili Fruit Colletotrichum gloeosporioides Anthracnose

Assessment of Growth and Productivity on Four Black Pepper Varieties (<i>Piper nigrum</i>L.) in Three Target Provinces of Vietnam

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Engineering（科研） 2021年第12期13卷 647-655页

作者： Duong Thi Oanh Nguyen Van Long Nguyen Quang ngoc Tran Thi Dieu Hien pham Thi Hoai Nguyen Ba Huy Pepper Research and Development Centre Pleiku City Viet Nam

Black pepper varieties, namely “Vinh linh”, “Lada”, “An Do” and “Loc Ninh” were planted in three different ecological regions: Dak Lak, Gia Lai and Dong Nai in order to compare the growth ability, productivity, and quality of peppercorn. The experiments were designed in the Randomized Complete Block Design (RCBD) with four replications. The results of study have been indicated that “Vinh linh” and “Lada” both varieties performed better crucial parameters of growth, productivity and yield, after 36 months planted. Although having greater growth parameter in the location of Dong Nai province, four varieties showed lower yield than other regions. By contrast, the four pepper types achieved the highest yield in Gia Lai, followed by Dak Lak. With respect to peppercorn quality, “Vinh linh”, “Loc Ninh” and “Lada” achieved requirements of Vietnamese Standard (TCVN 7036:2008) including bulk density: 535.69 - 612.72 g/l;piperine: 4.06 - 4.31 g/100g and volatile oil at 2.72 - 3.16 ml/100g. In contrast, “An Do” variety presented the poorest level of piperine (3.78 g/100g), and unachieved requirements.

关键词： Pepper Varieties Growth Yield Ecology Vietnam

Prevalence of Strongyloides in Southeast Asia:a systematic review and meta-analysis with implications for public health and sustainable control strategies

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Infectious Diseases of Poverty 2023年第5期12卷 91-91页

作者： Abigail Hui En Chan Teera Kusolsuk Dorn Watthanakulpanich Wallop Pakdee pham ngoc Doanh Azlin Mohd Yasin Paron Dekumyoy Urusa Thaenkham Department of Helminthology Faculty of Tropical Medicine Mahidol University Bangkok Thailand Institute of Ecology and Biological Resources Graduate University of Science and Technology Vietnam Academy of Science and Technology Hanoi Vietnam Department of Parasitology and Medical Entomology Faculty of Medicine Universiti Kebangsaan Malaysia Selangor Malaysia

Background Strongyloidiasis,caused by the nematodes Strongyloides stercoralis and Strongyloides fuelleborni,is estimated to afect over 600 million individuals *** disease is endemic in Southeast Asia,where a warmhumid climate and socio-economic conditions maintain the parasite’s life cycle and ***,the current diagnostic methods may not be sufciently sensitive,suggesting that the true prevalence of strongyloidiasis could be seriously underestimated in *** study aims to determine the prevalence of strongyloidiasis in Southeast Asia through a systematic review and meta-analysis and to discuss the implications of the estimated prevalence on diagnostic approaches and control *** Following PRISMA guidelines,we conducted a systematic literature search in PubMed and Google Scholar databases to identify studies reporting Strongyloides prevalence data in the 11 Southeast Asian countries up to December 2022.A random efects model was employed to estimate the pooled prevalence of *** at both regional and country *** Out of 3722 articles identifed,224 met our inclusion *** *** specifcally,we found 187 articles,of which 52.4%were from *** Southeast Asian countries,except Brunei,had at least one study on Strongyloides *** estimated pooled prevalence of *** regionally was 12.7%(95%CI 10.70-14.80%),ranging from 0.4 to 24.9%at the country *** had the highest pooled prevalence(24.9%,95%CI 15.65-35.38%),followed by Lao PDR(16.5%,95%CI 9.50-24.95%).Moreover,we obtained a pooled prevalence of 10%(95%CI 7.06-13.52%)in a group comprising immigrants,workers,and veterans from Southeast Asian *** infects various host types,including nonhuman primates,domestic dogs and cats,rodents,and transport carriers such as cockroaches and *** A high prevalence of strongyloidiasis in Southeast Asia was revealed,highlighting the importance of

关键词： Strongyloides Strongyloidiasis Southeast Asia Prevalence Systematic review

Orange G degradation by heterogeneous peroxymonosulfate activation based on magnetic MnFe_(2)O_(4)/α-MnO_(2) hybrid

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Journal of Environmental Sciences 2023年第2期124卷 379-396页

作者： Le Thi Thao To Van Nguyen Van Quy Nguyen ngoc Man Phan Ki Jae Kim Nguyen Nhat Huy Nguyen Trung Dung Faculty of Physical and Chemical Engineering Le Quy Don Technical UniversityHanoi 100000Vietnam Department of Energy Engineering Konkuk UniversitySeoul 05029Korea School of Chemical Engineering College of EngineeringSungkyunkwan UniversityJangan-guSuwon 16419Korea Faculty of Environment and Natural Resources Ho Chi Minh City University of Technology(HCMUT)Ho Chi Minh City 700000Vietnam Vietnam National University Ho Chi Minh City Linh Trung WardThu Duc CityHo Chi Minh City 700000Vietnam

Wastewater containing an azo dye Orange G(OG)causes massive environmental pollution,thus it is critical to develop a highly effective,environmental-friendly,and reusable catalyst in peroxymonosulfate(PMS)activation for OG *** this work,we successfully applied a magnetic MnFe_(2)O_(4)/α-MnO_(2) hybrid fabricated by a simple hydrothermal method for OG removal in *** characteristics of the hybrid were investigated by Xray diffraction,scanning electron microscopy,energy-dispersive X-ray spectroscopy,Fourier transform infrared spectroscopy,Brunauer–Emmett–Teller method,vibrating sample magnetometry,electron paramagnetic resonance,thermogravimetric analysis,and X-ray photoelectron *** effects of operational parameters(i.e.,catalytic system,catalytic dose,solution pH,and temperature)were *** results exhibited that 96.8% of OG degradation was obtained with MnFe_(2)O_(4)/α-MnO2(1:9)/PMS system in 30 min regardless of solution pH ***,the possible reaction mechanism of the coupling system was proposed,and the degradation intermediates of OG were identified by mass *** radical quenching experiments and EPR tests demonstrated that SO_(4)•̶,O_(2)•̶,and 1O2 were the primary reactive oxygen species responsible for the OG *** hybrid also displayed unusual stability with less than 30%loss in the OG removal after four sequential ***,magnetic MnFe2O4/α-MnO2 hybrid could be used as a high potential activator of PMS to remove orange G and maybe other dyes from wastewater.

关键词： MnFe_(2)O_(4)/α-MnO_(2) Peroxymonosulfate Orange G Catalytic degradation Reusability

Efficacy of He-Ne Laser in Combination with Topical Clindamycin in the Treatment of Acne Vulgaris (AV)

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Journal of Cosmetics, Dermatological Sciences and Applications 2020年第3期10卷 134-139页

作者： Bui Thi Van Nguyen ngoc Oanh Đặng Văn Em Huynh Thi Xuan Tam Nguyen Lan Anh pham Thi Minh Phuong Dermatology-Venereology and Allergy 108 Central Military Hospital Hanoi Vietnam Dermatology-Venereology Department Bach Mai Hospital Hanoi Vietnam pham ngoc Thach University of Medicine Ho Chi Minh City Vietnam

Objective: To evaluate the efficacy of He-Ne laser in combination with topical clindamycin in the treatment of AV at 108 Military Central Hospital from Oct 2015 to Aug 2016. Subjects and Methods: 61 patients with AV were divided into 2 groups: Group 1: 31 patients were treated with He-Ne laser in combination with topical Clindamycin, Group 2: 30 patients were only treated with topical clindamycin. Laser HE-NE was applied 2 times/week for 6 weeks. Result: After 3 months of treatment Group 1: very good—51.6%, good—48.4%. Group 2: very good—30%, good—50% and moderate—20%. Conclusion: The combination of He-Ne laser with topical clindamycin shows more rapid clinical improvement compared to topical clindamycin alone in the treatment of mild and moderate AV.

关键词： Acne Vulgaris He-Ne Laser Clindamycin

Effect of land use change on water discharge in Srepok watershed,Central Highland,Viet Nam

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International Soil and Water Conservation Research 2014年第3期2卷 74-86页

作者： Nguyen Thi ngoc Quyen Nguyen Duy Liem Nguyen Kim Loi Tay Nguyen University Viet Nam.567 Le Duan streetBuon Ma Thuot CityDak Lak Province Nong Lam University Viet Nam.Linh Trung WardThu Duc districtHo Chi Minh City

Srepok watershed plays an important role in Central Highland in Viet *** impacts to developing social-economic ***,it is necessary to research elements which impact to natural resources in this *** Soil and Water Assessment Tool(SWAT)model and Geography Information System(GIS)were used to simulate water discharge in the Srepok *** objectives of the research were to apply GIS and SWAT model for simulation water discharge and then,we assessed land use change which impacted on water discharge in the *** observed stream flow data from Ban Don Stream gauge station was used to calibrate for the period from 1981 to 2000 and then validate for the period from 2001 to *** using SWAT-CUP software to calibration,NSI reached 0.63 and R square value achieved 0.64 from 2004 to 2008 in calibration and NSI gained good level at 0.74 and R square got 0.75 from 2009 to 2012 in validation step at Ban Don *** that,land cover in 2010 was processed like land cover in 2000 and set up SWAT model *** simulated water discharge in scenario 1(land use 2000)was compared with scenario 2(land use 2010),the simulation result was not significant difference between two scenarios because the change of area of land use was not much enough to affect the fluctuation of water ***,the effect of land cover on water resource could be seen clearly via total water *** percentage of surface flow in 2000 was twice times more than in 2010;retard and base flow in 2000 was slightly more than in ***,decreased surface flow,increased infiltration capacity of water and enriched base flow resulted in the growth of land cover.

关键词： Water discharge Land use change GIS SWAT model Simulations

Patterns of hepatitis B virus exposure and associated predictors in Vietnam: A crosssectional study

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Asian Pacific Journal of Tropical Medicine 2020年第12期13卷 535-541页

作者： Minh C.Duong Phuc V.D.Le Oanh N.K.pham Hien D.T.pham Toan B.Nguyen Hai T.Phan School of Public Health and Community Medicine University of New South WalesSydneyNew South WalesAustralia MEDIC Medical Center Ho Chi Minh CityVietnam Hospital for Tropical Diseases Ho Chi Minh CityVietnam pham ngoc Thach University of Medicine Ho Chi Minh CityVietnam

Objective:To examine the magnitude of isolated anti-HBc and other HBV serological patterns and associated predictors among adults seeking general health check-up at a large health center in ***:All 564 outpatients seeking general health checkup between January 2016 and December 2016 were asked to undertake HBV surface antigen,surface antibody,IgG and IgM core antibody(anti-HBc total),platelet counts,and liver function *** administered questionnaire was used to collect information regarding demography,in-house sources of infection,lifestyle,health condition and treatment,and HBV ***:Male gender(P=0.043),age(P=0.000),living in urban areas(P=0.040),HBV vaccination status(P=0.033),and ALT(P=0.040) were associated with isolated *** infection was associated with HBV vaccination status(P=0.001),ALT levels(P=0.010),AST levels(P=0.020),and platelet counts(P=0.007).Past/resolved HBV infection was associated with AST levels(P=0.005),ALT levels(P=0.014),and age(P=0.000).Conclusions:Isolated anti-HBc is quite *** of isolated anti-HBc include male gender,living in rural areas,and HBV *** prevalence of isolated anti-HBc also increases with *** timely detect occult HBV infection and prevent transmission,anti-HBc testing should be included in the health check-up for high risk individuals and screening program where HBV nucleic acid test is not *** prevent transmission,clinicians need to pay more attention on those who are at risk of having isolated anti-HBc and closely follow-up patients with isolated anti-HBc and educate them about the prevention of HBV infection.

关键词： prevention seeking Vietnam

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越南经济加剧动荡

商业周刊（中文版） 2011年第8期 19-20页

作者： Oanh Ha Oiep ngoc pham 黎力（译）

越南必须设法控制国内通胀率，抑制工资上涨。否则将声誉扫地．人们不会再把这里看作是中国声场之外的一个可靠的外包地。

关键词：越南经济工资上涨通胀率扫地