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Ha, Nguyen Thi Hoang,Ha, Nguyen Thi,Nga, Tran Thi Huyen,Minh, Nguyen Ngoc,Anh, Bui Thi Kim,Hang, Nguyen Thi An,Duc, Nguyen Anh,Nhuan, Mai Trong,Kim, Kyoung-Woong Elsevier 2019 Applied geochemistry Vol.108 No.-
<P><B>Abstract</B></P> <P>Phytoremediation is a plant-based, environment-friendly, and cost-effective technology that can be potentially used to remediate contaminated media. This study was conducted to evaluate the phytoextraction and phytostabilization potential, two common techniques of phytoremediation, of 21 plant species growing naturally at the largest tungsten (W) mine in Vietnam—the second largest production of W in the world. The average concentrations in different soil fractions were in the following order: residue > organically complexed, Fe- and Mn oxide-bound > carbonate bound > exchangeable. The total concentrations of arsenic (As), cadmium (Cd), copper (Cu), and zinc (Zn) in the soil varied by 34–3390, 4.87–81.6, 14.3–2080, and 21.9–370 mg/kg, respectively. The concentrations of As, Cd, Cu, and Zn in the shoots ranged 0.71–2400, 0.05–5.55, 4.81–249, and 13.3–380 mg/kg-DW, respectively. The concentrations of As and Cd in all soil samples and Cu in 70% of soil samples collected around the mine fluctuated within 2–227, 3–54, and up to 21-folds higher than the maximum allowable limit for agricultural soils in Vietnam (QCVN 03-MT:2015/BTNMT). The results indicated that hyperaccumulation levels (mg/kg-DW) were obtained for only As in <I>Pityrogramma calomelanos</I> (2400) and <I>Pteris vittata</I> L. (1860). Based on the recorded hyperaccumulation levels, translocation and accumulation factors, biomass, and fast growth of these plants, <I>P. calomelanos</I> and <I>P. vittata</I> were considered to be promising native plants for the phytoextraction of As contaminated soils. <I>Bidens pilosa</I> L. also has great potential for phytostabilization of mining soils contaminated with As and heavy metals.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Soils near multi-metal (W–F–Cu–Au–Bi) mine were contaminated with As, Cd, Cu. </LI> <LI> Arsenic in shoots were in order of Fern > Monocotyledonae > Dicotyledonae. </LI> <LI> <I>Pityrogramma calomelanos</I> and <I>Pteris vittata</I> L. suggested for phytoextraction of As. </LI> <LI> <I>Bidens pilosa</I> L. suggested for the phytostabilization of mining contaminated soils. </LI> </UL> </P>
Factors Affecting Tourists’ Satisfaction in Associated Tourism Chains
Ha NGUYEN VAN,Thi Kim Hao DO,Thi Viet Ha NGUYEN,Ngoc Tien NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.6
Tourism is an interdisciplinary, inter-regional, inter-territory integrated economy; therefore, the construction of an associated tourism chain will help localities in the region take greater advantage of tourism resources and tourism products to meet the diverse needs of visitors (UNWTO, 2013). This research seeks to identify the factors affecting the satisfaction of tourists in the associated tourism chain in four central provinces of Vietnam – Binh Dinh, Phu Yen, Gia Lai, and Dak Lak. The study surveyed 1,361 tourists who have participated in an affiliated tour chain in these provinces during the March–April 2020 period. The survey was conducted online with the help of Google Form and the data collected were processed using descriptive statistics, exploratory factor analysis, and regression analysis. The research results show that two main factors are affecting the satisfaction of tourists in the associated tourism chain in the above regions, namely, (i) tourism resources (cultural beauty in localities in the associated tourism chain, local cuisine in the affiliated travel chain, natural landscapes/local attractions in the linked tourism chain, etc.); and (ii) tourism environment (the climate in localities in the associated tourism chain, the clean and fresh environment in localities in the associated tourism chain, etc.).
Nguyen, Ha Thi Kim,Hyoung, Sujin,Kim, Hae Jin,Cho, Kwang Moon,Shin, Jeong Sheop Elsevier 2019 Gene Vol.702 No.-
<P><B>Abstract</B></P> <P>Secondary cell wall (SCW) thickening provides the mechanical force for anther dehiscence and plays an important role in the formation of xylem structure. We have previously reported that <I>γMYB2</I>, a MYB coiled-coil protein, directly binds to the P1BS cis-element of the <I>PLA</I> <SUB> <I>2</I> </SUB> <I>-γ</I> promoter and acts as a co-activator of γMYB1 in controlling the expression of <I>PLA</I> <SUB> <I>2</I> </SUB> <I>-γ</I>. In this study, we analyzed morphological phenotypes of the constitutive overexpression (<I>γMYB2</I>-OE) and knock-down (<I>γMYB2</I>-KD) lines of <I>γMYB2</I>. We found that <I>γMYB2</I> overexpression caused the collapse of the endothecium layer, thereby suppressing anther dehiscence and forming short infertile siliques. The <I>γMYB2</I>-OE also showed less cellulose deposition in the xylem and had a longer primary stem than the wild-type, while <I>γMYB2</I>-KD had greater cellulose accumulation and a shorter primary stem than the wild-type. We demonstrated that the male sterility and the longer primary stem in <I>γMYB2</I>-OE were caused by reduced expression of SCW thickening-related genes. Our results suggest that <I>γMYB2</I> acts as a negative regulator in controlling the SCW thickening in Arabidopsis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>γMYB2</I>-OE causes the collapse of the endothecium layer, suppressing anther dehiscence and forming short infertile siliques </LI> <LI> The <I>γMYB2</I>-OE shows less cellulose deposition in the xylem and has a longer primary stem than the wild type </LI> <LI> <I>γMYB2</I> acts as a negative regulator in controlling the SCW thickening in Arabidopsis. </LI> </UL> </P>
Production of soybean transgenic plants with Bt crystal protein genes
Ha Neui Hong,Jung Hun Pak,Mi-Jin Kim,Hye Jeong Kim,Quyen Nguyen Thi,Yeon Ho Je,Young Soo Chung 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Bacillus thuringiensis (Bt) crystal protein genes encode insecticidal δ-endotoxins that are widely used for the development of insect-resistant crops. Common soybean is a crop of economic and nutritious importance in many parts of the world. Korea soybean variety Kwangan was transformed with Bacillus thuringiensis (Bt) crystal protein genes. These genes were transformed into Kwangan using highly efficient soybean transformation system. Transgenic plants with Bt crystal protein genes were confirmed for gene introduction and their expression using PCR, real-time PCR and RT-PCR. Currently, the confirmation of stable gene introduction with Bt genes is also performing by southern blot analysis and physiology test and agronomic characters are investigating.
Comparative Analysis of Anticancer and Antibacterial Activities among Seven Trametes Species
Ha Thi Kim Nguyen,Jiwon Lee,Yejin Park,Hyon Jin Park,안순길,김재광,Dong-Ku Kang,Minkyeong Kim,안초롱,김창무,최재혁 한국균학회 2023 Mycobiology Vol.51 No.4
Species in the genus Trametes (Basidiomycota, Polyporales) have been used in natural medicinefor a long time. Many studies reported that mycelia or fruiting bodies of Trametes spp. exhibited effects of antioxidant, anti-inflammatory, anticancer, and antimicrobial activities. However, comparative analysis in this genus is scarce due to limitation of morphologicalidentification and the sample number. In this study, the 19 strains of seven Trametes specieswere chosen to generate a five-gene-based phylogeny with the 31 global references. In addition,39 culture extracts were prepared for 13 strains to test for anticancer and antibacterialactivities. Strong anticancer activities were found in several extracts from T. hirsuta and T. suaveolens. Anticancer activities of T. suaveolens, T. cf. junipericola and T. trogii were firstdescribed here. The antibacterial ability of T. versicolor and T. hirsuta extracts has been confirmed. The antibacterial activities of T. suaveolens have been reported at the first time inthis study. These results suggest an efficient application of the genus Trametes as the drugresources especially for anticancer agents.
Nguyen Thi Mai Tho,Bui The Huy,Dang Nguyen Nha Khanh,Ho Nguyen Nhat Ha,Vu Quang Huy,Ngo Thi Tuong Vy,Do Manh Huy,Duong Phuoc Dat,Nguyen Thi Kim Phuong 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.12
Novel highly active visible-light photocatalysts in the form of zinc bismuth oxide (ZnBi2O4) and graphite hybrid composites were prepared by coupling via a co-precipitation method followed by calcination at 450 oC. The asprepared ZnBi2O4-graphite hybrid composites were tested for the degradation of rhodamine B (RhB) solutions under visible-light irradiation. The existence of strong electronic coupling between the two components within the ZnBi2O4- graphite heterostructure suppressed the photogenerated recombination of electrons and holes to a remarkable extent. The prepared composite exhibited excellent photocatalytic activity, leading to more than 93% of RhB degradation at an initial concentration of 50mg·L1 with 1.0 g catalyst per liter in 150min. The excellent visible-light photocatalytic mineralization of ZnBi2O4-1.0graphite in comparison with pristine ZnBi2O4 could be attributed to synergetic effects, charge transfer between ZnBi2O4 and graphite, and the separation efficiency of the photogenerated electrons and holes. The photo-induced h+ and the superoxide anion were the major active species responsible for the photodegradation process. The results demonstrate the feasibility of ZnBi2O4-1.0graphite as a potential heterogeneous photocatalyst for environmental remediation.