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Spatio-Temporal Analysis of Drought in the North-Eastern Coastal Region of Vietnam Using the Standardized Precipitation Index (SPI)

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Atmospheric and Climate Sciences 2023年第2期13卷 175-200页

作者： Nguyen Van Tuan Nguyen Van Hieu Nguyen Khac Bang pham Hoang Hai Nguyen Khanh Van le Vinh Ha Tran Thi Hoa Lê Trọng Hiếu Institute of Water Resources Planning Hanoi Vietnam Institute of Environment and Public Health Vietnam Union of Science and Technology Associations Hanoi Vietnam Thai binh University Thai Binh Vietnam Faculty of Electronics and Telecommunications Electric Power University Hanoi Vietnam

Spatio-temporal analysis of drought provides valuable information for drought management and damage mitigation. In this study, the Standardized Precipitation Index at the time scale of 6 months (SPI-6) is selected to reflect drought conditions in the North-Eastern coastal region of Vietnam. The drought events and their characteristics from 1981 to 2019 are detected at 9 meteorological stations and 10 Chirps rainfall stations. The spatio-temporal variation of drought in the study region is analyzed on the basis of the number, duration, severity, intensity, and peak of the detected drought events at the 19 stations. The results show that from 1981 to 2019 the drought events mainly occurred with 1-season duration and moderate intensity and peak. The number, duration, severity, and peak of the drought events were the greatest in the period 2001-2010 and were the smallest in the period 2011-2019. Among the 19 stations, the drought duration tends to decrease at 11 stations, increase at 7 stations, and has a slight variant at 1 station;the drought severity tends to decrease at 14 stations, increase at 4 stations, and has not a significant trend at 1 station;the drought intensity tends to decrease at 17 stations, increase at 1 station, and has a slight variant at 1 station;and the drought peak tends to decrease at 18 stations and increase at 1 station.

关键词： Spatio-Temporal Analysis of Drought Standardized Precipitation Index (SPI) Drought Characteristics

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不同含水状态级配碎石临界动应力及变形规律研究

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铁道学报 2016年第6期38卷 100-107页

作者：刘宝苏谦 pham Duc Phong 白皓 LAM Thi Huyen Hanh 西南交通大学土木工程学院四川成都610031 le Quy Don技术大学特种工程学院越南河内100803 四川高速公路建设开发总公司四川成都610041

为评估含水率变化对高速铁路无砟轨道基床表层级配碎石动力性能的影响,本文针对最优含水率和饱和含水率两种状态下级配碎石循环动力性能开展室内大型动三轴试验研究,分析级配碎石的临界动应力和累积变形特性。研究表明:累积变形与荷载... 详细信息

为评估含水率变化对高速铁路无砟轨道基床表层级配碎石动力性能的影响,本文针对最优含水率和饱和含水率两种状态下级配碎石循环动力性能开展室内大型动三轴试验研究,分析级配碎石的临界动应力和累积变形特性。研究表明:累积变形与荷载作用次数、含水率关系密切,荷载作用次数超过10 000次后,含水率的影响逐渐显现,荷载作用次数达到20 000次时,饱和含水率的累积变形相对最优含水率增大70%;不同含水率级配碎石的衰减型和破坏型累积变形曲线可分别用Stewart模型和Monismith模型预测;级配碎石临界动应力随含水率增大而减小,随围压的增大线性增大,饱和含水状态对应的临界动应力较最优含水状态平均小13%。

关键词：高速铁路级配碎石大型三轴试验不同含水率累积变形临界动应力

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Dental pulp stem cells as a promising model to study imprinting diseases

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International Journal of Oral Science 2022年第2期14卷 174-181页

作者： Eloïse Giabicani Aurélie pham Céline Sélénou Marie-Laure Sobrier Caroline Andrique Julie lesieur Agnès Linglart Anne Poliard Catherine Chaussain Irène Netchine Universitéde Paris URP2496Laboratoire Pathologiesimagerie et biothérapies oro-facialesMontrougeFrance INSERM UMRS_938 Centre de Recherche Saint AntoineParisFrance APHP Hôpital de BicêtreEndocrinologie et Diabétologie de l’EnfantCentre de Référence des Maladies Rares du Métabolisme du Calcium et du PhosphateLe Kremlin-BicêtreFrance APHP Hôpital BretonneauCentre de Référence des Maladies Rares du Métabolisme du Calcium et du Phosphate et FHU DDS-netParisFrance Sorbonne Université INSERMUMRS_938APHPHôpital Armand TrousseauExplorations Fonctionnelles EndocriniennesParisFrance

Parental imprinting is an epigenetic process leading to monoallelic expression of certain genes depending on their parental *** diseases are characterized by growth and metabolic issues starting from birth to *** are mainly due to methylation defects in imprinting control region that drive the abnormal expression of imprinted *** currently lack relevant animal or cellular models to unravel the pathophysiology of growth failure in these *** aimed to characterize the methylation of imprinting regions in dental pulp stem cells and during their differentiation in osteogenic cells(involved in growth regulation)to assess the interest of this cells in modeling imprinting *** collected dental pulp stem cells from five controls and four patients(three with Silver-Russell syndrome and one with Beckwith-Wiedemann syndrome).Methylation analysis of imprinting control regions involved in these syndromes showed a normal profile in controls and the imprinting defect in *** results were maintained in dental pulp stem cells cultured under osteogenic ***,we confirmed the same pattern in six other loci involved in imprinting diseases in *** also confirmed monoallelic expression of H19(an imprinted gene)in controls and its biallelic expression in one *** imprinting control regions methylation analysis shows the strong potential of dental pulp stem cells in modeling imprinting diseases,in which imprinting regions are preserved in culture and during osteogenic *** will allow to perform in vitro functional and therapeutic tests in cells derived from dental pulp stem cells and generate other cell-types.

关键词： pulp maintained fir

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Application of Marker Assisted Backcrossing to Introgress the Submergence Tolerance QTL <i>SUB</i>1 into the Vietnam Elite Rice Variety-AS996

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American Journal of Plant Sciences 2012年第4期3卷 528-536页

作者： Luu M. Cuc Luu T. N. Huyen pham T. M. Hien Vu T. T. Hang Nguyen Q. Dam pham T. Mui Vu D. Quang Abdelbagi M. Ismail le H. Ham Agricultural Genetics Institute Tu Liem Vietnam Cuu Long River Delta Rice Research Institute Tan Thanh Vietnam International Rice Research Institute Metro Manila Philippine

The result of the study contributes to enhancing and sustaining future livelihoods and food security in Vietnam vis-a-vis climate change. An innovative strategy based on marker-assisted backcrossing (MABC) was used to transform popular rice variety AS996 into the one can tolerate submergence while maintaining its original characteristics preferred by farmers and consumers. The submergence tolerance QTL SUB1 counts for up to 70% of the submergence tolerant and provides a marked improvement of submergence tolerance in all genetic backgrounds and environments tested so far. Parental diversity was carried out with 460 markers. Of which, 53 polymorphic markers were used for assessment on BC1F1, BC2F1 and BC3F1 generations. The best BC1F1 plant was P422 with highest recipient allele was 87.5%, while the additional chosen plants were P412, P428, P215 and P39 (81% - 84%). All these plants were used to develop BC2F1 generation. The six BC2F1 plants were used to develop BC3F1 and BC2F2 were the plants number P422-11 and P422-14 having 93.75% recipient alleles and P422-12, P422-3, P39-17, P39-25 having 92.25% recipient alleles. Total of 445 BC3F1 plants were confirmed the introgresion of SUB1 using ART5 and SC3. After three generations of backcrossing, application of MABC resulted in the best BC3F1 individual P422-14-177 with 100% of recipient alleles based on the number of 53 markers used with only the introgression size of SUB1 was 0.3Mb between ART5 and SC3. Phenotyping was carried out on BC3F1 and BC2F2 of the selected lines. The survival ratio of these selected lines and IR64SUB1 were the same. It convinced the successfully introgress SUB1 into AS996 rice variety. The breeding line BC4F1 having 100% genetic background of donor variety is ready for develop new submergence tolerant rice variety ASS996-SUB1 to cope with climate change.

关键词： AS996-SUB1 Climate Change Marker-Assisted Backcrossing (MABC) Rice Submergence

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Influence of phytochemicals in piper betle linn leaf extract on wound healing

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Burns & Trauma 2015年第3期3卷 143-150页

作者： le Thi Lien Nguyen Thi Tho Do Minh Ha pham Luong Hang Phan Tuan Nghia Nguyen Dinh Thang Department of Biochemistry and Plant Physiology VNU University of ScienceVietnam National University334 Nguyen Trai St.Thanh Xuan DistrictHanoiVietnam Key laboratory of Enzyme and Protein Technology(KlePT) VNU University of ScienceVietnam National UniversityHanoiVietnam

Background:Wound healing has being extensively investigated over the *** impairment is caused by many reasons including increasing of free-radicals-mediated damage,delaying in granulation tissue formation,reducing in angiogenesis and decreasing in collagen *** facts consequently lead to chronic wound *** betle Linn(Betle)leaves have been folklore used as an ingredient of drugs for cutaneous wound ***,the effect of betle leaf on wound healing is not yet well *** this study,we aimed to investigate the healing efficacy of methanol leaf extract of Piper betle Linn on proliferation of fibroblast NIH3T3 cells as well as full-thickness burn and excision wounds in swiss ***:Scratch wound healing assays were conducted to examine the effects of betle leaf extract on healing activity of fibroblast *** and excision wounds on swiss mouse skins were created for investigating the wound healing progress caused by the betle leaf ***(MDA)was also evaluated to examine the products of lipid hydroperoxide(LPO)under conditions of with or without betle leaf extract ***:The results of this study showed that Piper betle Linn leaf extract in methanol increased proliferation of NIH3T3 cells and promoted wound healing in vitro and in vivo with both burn wound and excision wound *** addition,this extract significant decreased level of malondialdehyde(MDA)in liver of treated-mice compared with that in non-treated ***:Our results suggest that Piper betle Linn can be used as an ingredient in developing natural origin drugs for treatment of cutaneous wounds.

关键词： Piper betle Linn leaf extract Wound healing Malondialdehyde(MDA) Fibroblast(NIH3T3)

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Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests

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Journal of Forestry Research 2020年第5期31卷 1713-1722页

作者： Tran Van Do Mamoru Yamamoto Osamu Kozan Vo Dai Hai Phung Dinh Trung Nguyen Toan Thang Lai Thanh Hai Vu Thanh Nam Trieu Thai Hung Hoang Van Thang Tran Duc Manh Cao Chi Khiem Vu Tien Lam Nguyen Quang Hung Tran Hoang Quy pham Quang Tuyen Trinh Ngoc Bon Nguyen Thi Thu Phuong Ninh Viet Khuong Nguyen Van Tuan Dang Thi Hai Ha Tran Hai Long Dang Van Thuyet Dang Thinh Trieu Nguyen Van Thinh Tran Anh Hai Duong Quang Trung Nguyen Van Bich Dinh Hai Dang pham Tien Dung Nguyen Huy Hoang le Thi Hanh Phan Minh Quang Nguyen Thi Thuy Huong Hoang Thanh Son Nguyen Thanh Son Nguyen Thi Van Anh Nguyen Thi Hoai Anh pham Dinh Sam Hoang Thi Nhung Hoang Van Thanh Nguyen Huu Thinh Tran Hong Van Ho Trung Luong Bui Kieu Hung Research Institute for Sustainable Humanosphere Kyoto UniversityUjiKyotoJapan Silviculture Research Institute Vietnamese Academy of Forest SciencesNorth Tu LiemHanoiVietnam Center for Southeast Asian Studies Kyoto UniversityKyotoJapan Vietnamese Academy of Forest Sciences North Tu LiemHanoiVietnam Vietnam Administration of Forestry No.2 Ngoc HaBa DinhHanoiVietnam

Biotic and abiotic factors control aboveground biomass(AGB)and the structure of forest *** study analyses the variation of AGB and stand structure of evergreen broadleaved forests among six ecoregions of Vietnam.A data set of 1731-ha plots from 52 locations in undisturbed old-growth forests was *** results indicate that basal area and AGB are closely correlated with annual precipitation,but not with annual temperature,evaporation or hours of *** area and AGB are positively correlated with trees>30 cm *** areas surveyed(52.6%)in these old-growth forests had AGB of 100–200 Mg ha^-1;5.2%had AGB of 400–500 Mg ha^-1,and 0.6%had AGB of>800 Mg ha^-*** percent of the areas surveyed had stand densities of 300–600 ***^-1,and 64%had basal areas of 20–40 m^2 ha^-*** is an important factor influencing the AGB of old-growth,evergreen broadleaved forests in *** causing the loss of large-diameter trees(e.g.,>100 cm DBH)affects AGB but may not seriously affect stand density.

关键词： Aboveground biomass Carbon storage Climatic variables Ecoregion Edaphic variables Oldgrowth forest

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Spectrally　Adjustable　Picosecond　Dye　Laser　Pulses　Generated　with　Nanosecond　Nitrogen　Lasers

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Chinese Journal of Lasers 1995年第5期 385-392页

作者： Nguyen Dai Hung pham Long Dinh Van Trung Nguyen Van Tien le Hoang Hai and Nguyen Ha (Institute of Material sciences.Vietnam National Centre for Sciences and Technology.Nghia Do,TuLiem,Hanoi,Vietnam)

ＳｐｅｃｔｒａｌｌｙＡｄｊｕｓｔａｂｌｅＰｉｃｏｓｅｃｏｎｄＤｙｅＬａｓｅｒＰｕｌｓｅｓＧｅｎｅｒａｔｅｄｗｉｔｈＮａｎｏｓｅｃｏｎｄＮｉｔｒｏｇｅｎＬａｓｅｒｓＮｇｕｙｅｎＤａｉＨｕｎｇ；ＰｈａｍＬｏｎｇ；Ｄｉｎｈ... 详细信息

ＳｐｅｃｔｒａｌｌｙＡｄｊｕｓｔａｂｌｅＰｉｃｏｓｅｃｏｎｄＤｙｅＬａｓｅｒＰｕｌｓｅｓＧｅｎｅｒａｔｅｄｗｉｔｈＮａｎｏｓｅｃｏｎｄＮｉｔｒｏｇｅｎＬａｓｅｒｓＮｇｕｙｅｎＤａｉＨｕｎｇ；ＰｈａｍＬｏｎｇ；ＤｉｎｈＶａｎＴｒｕｎｇ；ＮｇｕｙｅｎＶａ...

关键词： dye laser spectrotemporal selection laser smooth pulse UV laser

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Evaluating the yield of systematic screening for tuberculosis among three priority groups in Ho Chi Minh City,Viet Nam

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Infectious Diseases of Poverty 2020年第6期9卷 16-28页

作者： Luan Nguyen Quang Vo Andrew James Codlin Rachel Jeanette Forse NgaThuy Nguyen Thanh Nguyen Vu Giang Truong le Vinh Van Truong Giang Chau Do Ha Minh Dang Lan Huu Nguyen Hoa binh Nguyen Nhung Viet Nguyen Jens levy Knut Lonnroth SBertel Squire Maxine Caws Friends for International TB Relief 68B Nguyen Van Troi8Phu NhuanHo Chi Minh CityViet Nam Interactive Research and Development Ho Chi Minh CityViet Nam Ho Chi Minh City Public Health Association Ho Chi Minh CityViet Nam pham Ngoc Thach Hospital Ho Chi Minh CityViet Nam National Lung Hospital Ha NoiViet Nam KNCV Tuberculosefonds The HagueThe Netherlands Department of Global Public Health Karolinska InstitutetStockholmSweden Department of Clinical Sciences Liverpool School of Tropical MedicineLiverpoolUK Birat Nepal Medical Trust LazimpatKathmanduNepal

Background: In order to end tuberculosis(TB),it is necessary to expand coverage of TB care services,including systematic screening ***,more evidence is needed for groups among whom systematic screening is only conditionally recommended by the World Health *** study evaluated concurrent screening in multiple target groups using community health workers(CHW).Methods:: In our two-year intervention study lasting from October 2017 to September 2019,CHWs in six districts of Ho Chi Minh City,Viet Nam verbally screened three urban priority groups:(1)household TB contacts;(2)close TB contacts;and(3)residents of urban priority areas without clear documented exposure to TB including hotspots,boarding homes and urban *** persons were referred for further screening with chest radiography and follow-on testing with the Xpert MTB/RIF *** individuals with normal or without radiography results were tested on smear *** described the TB care cascade and characteristics for each priority group,and calculated yield and number needed to ***,we fitted a mixed-effect logistic regression to identify the association of these target groups and secondary patient covariates with TB treatment ***: We verbally screened 321020 people including 24232 household contacts,3182 social and close contacts and 293606 residents of urban priority *** resulted in 1138 persons treated for TB,of whom 85 were household contacts,39 were close contacts and 1014 belonged to urban priority area *** yield of active TB in these groups was 351,1226 and 345 per 100000,respectively,corresponding to numbers needed to screen of 285,82 and *** fitted model showed that close contacts[adjusted odds ratio(aOR)=2.07;95%CI:1.38–3.11;P<0.001]and urban priority area residents(aOR=2.18;95%CI:1.69–2.79;P<0.001)had a greater risk of active TB than household ***: The study detected a large number of un

关键词： Case detection Tuberculosis Active case finding Urban Viet nam

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Finite element analysis of functionally graded sandwich plates with porosity via a new hyperbolic shear deformation theory

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Defence technology 2022年第3期

作者： pham Van Vinh le Quang Huy

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Annealing Effect on the Ionic Conductivity of La0.6-.xLi3xTiO3 Made by Double Mechanical Alloying Method

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材料科学与工程（中英文B版） 2014年第4期4卷 86-94页

作者： le Dinh Trong Nguyen Nang Dinh pham Duy Long Faculty of Physics Hanoi Pedagogical University No.2 Xuan Hoa Phuc Yen Vinh Phue Vietnam Faculty of Engineering Physics & Nanotechnology University of Engineering and Technology Hanoi Vietnam National University 144 Xuan Thuy str. Cau -Giay Dist. Hanoi 1000 Vietnam Institute of Materials Science Vietnam Academy of Science and Technology 18 Hoang-Quoc-Viet str. Cau -Giay Dist. Hanoi Vietnam

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