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| 1 | Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests显示文摘Biotic and abiotic factors control aboveground biomass(AGB)and the structure of forest ecosystems.This 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 developed.The results indicate that basal area and AGB are closely correlated with annual precipitation,but not with annual temperature,evaporation or hours of sunshine.Basal area and AGB are positively correlated with trees>30 cm DBH.Most 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^-1.Seventy percent of the areas surveyed had stand densities of 300–600 ind.ha^-1,and 64%had basal areas of 20–40 m^2 ha^-1.Precipitation is an important factor influencing the AGB of old-growth,evergreen broadleaved forests in Vietnam.Disturbances causing the loss of large-diameter trees(e.g.,>100 cm DBH)affects AGB but may not seriously affect stand density. | 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 | 2020 | Journal of Forestry Research2020，31，5： | 1 |
| 2 | Effect of Poly-Alkylene-Glycol Quenchant on the Distortion, Hardness, and Microstructure of 65Mn Steel显示文摘Currently,the 65Mn steel is quenched mainly by oil media.Even though the lower cooling rate of oil compared to water reduces the hardness of steel post quenching,the deforming and cracking of parts are often minimized.On the other hand,the oil media also has the disadvantage of being ammable,creating smoke that adversely affects the media.The poly alkylene glycol(PAG)polymer quenchant is commonly used for quenching a variety of steels based on its advantages such as non-ammability and exible cooling rate subjected to varying concentration and stirring speed.This article examines the effect of PAG polymer quenching solution(with concentrations of 10%and 20%)on deformation,hardness,and microstructure of C-ring samples made of 65Mn steel.Furthermore,the performance of PAG polymer quenchant is also compared with those of two common quenching solutions:Water and oil.When cooling in water,the C-ring samples had the largest deformation and 2 times higher than the results obtained when a 10%PAG solution was used.In particular,similar levels of deformation on the C-ring samples were observed in both cases of 20%PAG solution and oil as the primary quenching media.Furthermore,the hardness level measured between the sampled parts quenched in the 20%PAG solution appeared to be more uniform than that obtained from the oil-quenched sample.The study of the microscopic structure of steel by optical microscopy combined with X-ray diffraction showed that the water hardened sample exhibited cracks and comprised of two phases,martensite and retained austenite.According to the results of Electron Back Scattering Diffraction(EBSD)analysis and backscattering electronic image(BSE),the content of austenite residue in the sample when the sample was cooled in PAG 10 and 20%solution was 3.21%and 4.73%,respectively and smaller than the measurements obtained from oil quenching solution.Thus,the 65Mn steel is cooled in 20%PAG solution for high hardness and more evenly distributed than when it is quenched in oil while still ensuring a small level of deformation.Therefore,the PAG 20%solution can completely replace oil as the main media used to quench the 65Mn steel. | Thi Xuan Tran Xuan Phuong Nguyen Duong Nam Nguyen Dinh Toai Vu Minh Quang Chau Osamah Ibrahim Khalaf Anh Tuan Hoang | 2021 | Computers, Materials & Continua2021，，6： | 1 |
| 3 | Green Tea Epigallocatechin Gallate Exhibits Anticancer Effect in Human Pancreatic Carcinoma Cells via the Inhibition of Both Focal Adhesion Kinase and Insulin-Like Growth Factor-I Receptor显示文摘 | Hoang Anh Vu Yuuichi Beppu Hoang Thanh Chi Kousuke Sasaki Hideaki Yamamoto Phan Thi Xinh Takashi Tanii Yukihiko Hara Toshiki Watanabe Yuko Sato Iwao Ohdomari Gary E. Gallick | 2011 | Journal of Biomedicine and Biotechnology2011，，： | 1 |
| 4 | A compact broadband balun on multilayer organic substrate显示文摘 | Hai Hoang Ta Anh Vu Pham | 2013 | Microware Opticeal Technology Letters2013，55，8： | 1 |
| 5 | Synchronous rectal adenocarcinoma and intestinal mantle cell lymphoma:A case report显示文摘BACKGROUND Mantle cell lymphoma(MCL)of the gastrointestinal tract is a rare malignancy,accounting for about 0.2%of malignant colorectal tumors.MCL synchronous with rectal adenocarcinoma is extremely rare.We know of only a few cases reported in the literature.We describe the case of a patient with synchronous rectal adenocarcinoma and intestinal MCL.CASE SUMMARY A 63-year-old man was admitted to our hospital due to abdominal pain and hematochezia over the past month.The patient was diagnosed with middle rectal cancer cT2N0M0 and underwent surgery.However,we found a large tumor in the small intestine during surgery.The patient underwent total mesorectal excision for rectal cancer and resectioning of the ileal segment containing the large mass.Pathology and immunohistochemistry revealed the presence of both rectal adenocarcinoma and pathognomonic MCL stage IIE presenting as multiple lymphomatous polyposis.The patient subsequently underwent RDHAP/RCHOP chemotherapy and was maintained with rituximab.A Positron Emission Tomography and Computed Tomography(PET/CT)scan showed that the disease responded well to treatment without tumor-increased metabolism in the gastrointestinal tract.CONCLUSION Synchronous rectal adenocarcinoma and intestinal MCL presenting as multiple lymphomatous polyposis are extremely rare.MCL is often discovered fortuitously when rectal cancer is diagnosed.The coexistence of these tumors poses treatment challenges. | Kim-Van Vu Nguyen-Van Trong Nguyen-Thi Khuyen Do Huyen Nga Hoang Anh Nguyen Tien Trung PhamTrung Thong Nguyen Minh Duc | 2023 | World Journal of Clinical Cases2023，11，24： | 0 |
| 6 | Down-regulated expression of NPM1 in IMS-M2 cell line by(-)-epigallocatechin-3-gallate显示文摘Objective:To investigate the inhibited effect of epigallocatechin-3-gallate(EGCG)on the expression of NPM1 in IMS-M2 cells harboring the NPMl mutations.Methods:Cell proliferation assay was performed to test the effects of EGCG on eell growth of IMS-M2 cells harboring the NPM1 mutations.Western blot analysis were performed to test the protein expression of NPM1,AKT,those associated with apoplosis.Results:EGCG can down-regulate the expression of NPM1 in IMS-M2 cells harboring the NPM1mutations.Moreover,EGCG also suppressed the cell proliferation and induced apoptosis in IMSM2 cells.Conclusions:The results suggested that EGCG could be considered as a reagent for treatment of AML patients with NPM1 mutations. | Hoang Thanh Chi Bui Thi Kim Ly Hoang Anh Vu Yuko Sato Phu Chi Dung Phan Thi Xinh | 2014 | Asian Pacific Journal of Tropical Biomedicine2014，4，7： | 0 |
| 7 | Hydrogen roles approaching ideal electrical and optical properties for undoped and Al doped ZnO thin films显示文摘This paper distinguished hydrogen roles to improve electron mobility and carrier concentration in ZnO and Al doped ZnO sputtered films.By combining experimental evidences and theoretical results,we find out that hydrogen located at oxygen vacancy sites(H_(O))is the main factor gives rise to increase simultaneously mobility and carrier concentration which has not been mentioned before.Introducing appropriate hydrogen content during sputtering not only results in crystalline relaxation but also supports doping Al into ZnO,increasing carrier concentration and electron mobility in the film.First principles calculations confirmed hydrogen substitutional stability for oxygen vacancy,significantly reducing electron conductivity effective mass and hence increasing electron mobility.In particular,0.8%hydrogen partial pressure ratio achieved 61 cm^(2)V^(-1)s^(-1)maximum electron mobility,optical transmittance above 82%in visible and near-infrared regions,and 2×10^(20) cm^(-3)carrier concentrations for H-Al co-doped ZnO film.These values approach ideal electrical and optical properties for transparent conducting oxide films.The presence of one maximum electron mobility was attributed to competition between increasing mobility due to restoring effective electron mass and hydrogen passivation of native defects,and decreased electron mobility due to electron-phonon scattering. | Dung Van Hoang Nam Hoang Vu Nga Thi Do Anh Tuan Thanh Pham Truong Huu Nguyen Jer-Lai Kuo Thang Bach Phan Vinh Cao Tran | 2022 | Journal of Materiomics2022，8，1： | 0 |
| 8 | 日轮果属,越南唇形科黄芩亚科一新属显示文摘描述并绘制了越南唇形科一新属及新种:日轮果属(Heliacria Bo Li,C.L.Xiang,T.S.Hoang&Nuraliev)和日轮果(H.maritima Bo Li,C.L.Xiang,T.S.Hoang&Nuraliev)。日轮果属因具攀援藤本习性,花大且花冠为纯白色,花萼近辐射对称、5深裂、裂片长且在果期增大并开展,果实顶端具放射状的瘤状突起等特征而明显区别于黄芩亚科的其他5属。目前,该属仅发现于越南东南部沿海的平定省、富安省、庆和省和宁顺省,常生于海岸边干旱的低地矮林中。 | 李波 Thanh Son HOANG Maxim S.NURALIEV Vu Anh TAI Andrey N.KUZNETSOV Svetlana P.KUZNETSOVA 向春雷 | 2023 | 热带亚热带植物学报2023，31，5： | 0 |
| 9 | Prevalence, risk factors, and BRAF mutation of colorectal sessile serrated lesions among Vietnamese patients显示文摘BACKGROUND Sessile serrated lesions(SSLs)are considered precancerous colorectal lesions that should be detected and removed to prevent colorectal cancer.Previous studies in Vietnam mainly investigated the adenoma pathway,with limited data on the serrated pathway.AIM To evaluate the prevalence,risk factors,and BRAF mutations of SSLs in the Vietnamese population.METHODS This is a cross-sectional study conducted on patients with lower gastrointestinal symptoms who underwent colonoscopy at a tertiary hospital in Vietnam.SSLs were diagnosed on histopathology according to the 2019 World Health Organi-zation classification.BRAF mutation analysis was performed using the Sanger DNA sequencing method.The multivariate logistic regression model was used to determine SSL-associated factors.RESULTS There were 2489 patients,with a mean age of 52.1±13.1 and a female-to-male ratio of 1:1.1.The prevalence of SSLs was 4.2%[95%confidence interval(CI):3.5-5.1].In the multivariate analysis,factors significantly associated with SSLs were age≥40[odds ratio(OR):3.303;95%CI:1.607-6.790],male sex(OR:2.032;95%CI:1.204-3.429),diabetes mellitus(OR:2.721;95%CI:1.551-4.772),and hypertension(OR:1.650,95%CI:1.045-2.605).The rate of BRAF mutations in SSLs was 35.5%.CONCLUSION The prevalence of SSLs was 4.2%.BRAF mutations were present in one-third of SSLs.Significant risk factors for SSLs included age≥40,male sex,diabetes mellitus,and hypertension. | Nhu Thi Hanh Vu Huy Minh Le Diem Thi-Ngoc Vo Hoang Anh Vu Nhan Quang Le Dung Dang Quy Ho Duc Trong Quach | 2024 | World Journal of Clinical Oncology2024，15，2： | 0 |
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