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  • 1
    In: Catalysis Today, Elsevier BV, Vol. 13, No. 4 ( 1992-4), p. 697-698
    Type of Medium: Online Resource
    ISSN: 0920-5861
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1992
    detail.hit.zdb_id: 2012626-8
    detail.hit.zdb_id: 56797-8
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  • 2
    Online Resource
    Online Resource
    Canadian Center of Science and Education ; 2022
    In:  Journal of Sustainable Development Vol. 15, No. 1 ( 2022-01-14), p. 49-
    In: Journal of Sustainable Development, Canadian Center of Science and Education, Vol. 15, No. 1 ( 2022-01-14), p. 49-
    Abstract: The presence of pesticide residues was investigated in the organic rice production model in An Giang province, Vietnam. A total number of sixteen pesticide residues was been recorded during the investigation. Based on their contamination rate, they are classified as follows. The high-risk group includes tricyclazole (80%). The medium-risk group includes chlorpyrifos (47%), isoprothiolane (47%), difenoconazole (40%), propiconazole (40%), hexaconazole (40%), chlorfenapyr (33%), azoxystrobin (20%), and cypermethrin (20%). The low-risk group includes metalaxyl & amp; metalaxyl-M, paclobutazol, niclosamide, chlorfenson, fipronil, fipronil-desulfinyl, and fenoxanil, which were detected with a contamination rate of 7%. There were seven insecticides, seven fungicides, one snail killer, and one growth regulator.
    Type of Medium: Online Resource
    ISSN: 1913-9071 , 1913-9063
    Language: Unknown
    Publisher: Canadian Center of Science and Education
    Publication Date: 2022
    detail.hit.zdb_id: 2492438-6
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  • 3
    Online Resource
    Online Resource
    Kyushu University ; 2002
    In:  Journal of the Faculty of Agriculture, Kyushu University Vol. 47, No. 1 ( 2002-10-30), p. 159-165
    In: Journal of the Faculty of Agriculture, Kyushu University, Kyushu University, Vol. 47, No. 1 ( 2002-10-30), p. 159-165
    Type of Medium: Online Resource
    ISSN: 0023-6152
    Language: English
    Publisher: Kyushu University
    Publication Date: 2002
    detail.hit.zdb_id: 2930360-6
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  • 4
    Online Resource
    Online Resource
    Can Tho University ; 2022
    In:  Can Tho University Journal of Science Vol. 58, No. Natural Sciences ( 2022-08-18), p. 28-37
    In: Can Tho University Journal of Science, Can Tho University, Vol. 58, No. Natural Sciences ( 2022-08-18), p. 28-37
    Abstract: Thí nghiệm được thực hiện nhằm khảo sát hàm lượng của một số hợp chất phổ biến có trong dịch cao chiết trái bụp giấm (Hibiscus sabdariffa L.), khả năng kháng oxy hóa, kháng khuẩn và kháng nấm của dịch cao chiết. Bằng phương pháp quang phổ, hàm lượng các hợp chất phenolic tổng và flavonoid tổng có trong cao chiết từ trái bụp giấm được xác định lần lượt là 378,09 và 1473,00 mg/g TLK, cho thấy có sự khác biệt rõ rệt giữa hàm lượng hai hợp chất. Khả năng kháng oxy hóa cũng được khảo sát dựa vào khả năng trung hòa gốc tự do DPPH (1,1-Diphenyl-2-picrylhydrazyl) (EC50= 465,75 µg/mL) và khử sắt (EC50= 259,24 µg/mL). Đồng thời, cao chiết từ trái bụp giấm cho thấy khả năng kháng các chủng vi sinh vật Bacillus subtilis, B. cereus ATCC10876, Staphylococcus aureus ATCC25923, Listeria innocua ATCC33090, Pseudomonas aeruginosa ATCC27853, Salmonella sp. và Escherichia coli ATCC25922 với nồng độ ức chế tối thiểu dao động từ khoảng 16 - 32 mg/mL. Ngoài ra khả năng kháng chủng nấm mốc Aspergillus niger ATCC6275 cũng ghi nhận được kết quả tương tự.
    Type of Medium: Online Resource
    ISSN: 2815-5599 , 1859-2333
    Language: Unknown
    Publisher: Can Tho University
    Publication Date: 2022
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  • 5
    Online Resource
    Online Resource
    Ministry of Science and Technology, Vietnam (VMOST) ; 2022
    In:  Ministry of Science and Technology, Vietnam Vol. 64, No. 3 ( 2022-9-15), p. 3-7
    In: Ministry of Science and Technology, Vietnam, Ministry of Science and Technology, Vietnam (VMOST), Vol. 64, No. 3 ( 2022-9-15), p. 3-7
    Abstract: This research aimed to extract lignin from rice straw and reveal the pH value of diluted acid at which the most effective yield of lignin was precipitated. In this study, rice straw obtained from local fields in the An Giang province of Vietnam and sodium hydroxide 2 M was employed to extract lignin from rice straw. Hydrochloric acid was used to adjust the sample pH values to be in the range of 1.5-3.5. Fourier-transform infrared spectroscopy (FTIR) analysis was used to characterize the functional groups of the lignin materials. Thermogravimetric analysis (TGA) analysis was employed to supply information on the thermal decomposition of the lignin samples. Herein, the results showed that lignin precipitated at different pH values affected its thermal properties. At 700oC, the yield of the remaining lignin components were 56% at pH 2.0, but the weight loss of lignin samples precipitated at pH 3.5 dropped to 85% because many non-lignin substances existed in the samples. The yield of the crude lignin samples obtained were 16.51, 17.66, 15.27, 14.33 and 13.26% for pH of 1.5, 2.0, 2.5, 3.0 and 3.5 respectively. The crystallite regions played an important role in the lignin structures. The spectrum peaks at pH 1.5, 2.0 and 2.5 were broader than the peaks at pH 3.0 and 3.5. The results demonstrated the highest percentage of lignin precipitate was collected at pH 2.0.
    Type of Medium: Online Resource
    ISSN: 2525-2461
    URL: Issue
    Language: Unknown
    Publisher: Ministry of Science and Technology, Vietnam (VMOST)
    Publication Date: 2022
    detail.hit.zdb_id: 3145662-5
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  • 6
    In: Progress in Development Studies, SAGE Publications, Vol. 23, No. 4 ( 2023-10), p. 461-480
    Abstract: Locally led adaptation is increasingly promoted as an important strategy for addressing the impacts of climate change. However, the understanding of rural realities in the Global South is still limited by insufficient information about the complex and dynamic relationships between rural communities and their environment. These relationships are influenced both by the material aspects of place and by the social and cultural dynamics that shape identities. This paper seeks to address this gap by providing an in-depth examination of how older and younger people are living with environmental change in two rural areas in Vietnam. Recognizing the lack of attention given to older people as important environmental actors, this paper will make three key contributions: move from a focus on the vulnerability of older people to one which highlights their capabilities; introduce an intergenerational approach that builds an inclusive understanding of rural communities; and embrace a complex appreciation of environmental change that looks beyond the usual framings of climate change and impact upon livelihoods’ to other aspects of people’s relationship with a changing environment. In doing so, this paper calls for an increased appreciation for the multiple values of nature, particularly how different community members engage with and appreciate their environment, to support more relevant and sustainable approaches to addressing local environmental challenges.
    Type of Medium: Online Resource
    ISSN: 1464-9934 , 1477-027X
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2053875-3
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  • 7
    In: Water, MDPI AG, Vol. 14, No. 15 ( 2022-08-04), p. 2418-
    Abstract: River morphological change is the complex evolution of riverbed states, which can lead to serious riverbank failures, and is a worldwide concern. However, revealing the cause of the evolution, in particular, the potential morphological scouring by eddy currents, is difficult. Accordingly, we propose a comprehensive combination of 2D and 3D simulations to reveal the eddy currents. We selected the Vam Nao, part of the Mekong River, with semi-tidal effects and confluence flows as the case study. We created two unstructured 40 m × 40 m triangular meshes using inverse distance interpolation. This study used the Saint–Venant equations (TELEMAC2D) and Navier–Stokes equations (TELEMAC3D) to reveal the eddy currents for 2009, 2017, and 2018. TELEMAC2D (the simplified form of TELEMAC3D) was assessed for 15 days, 3 months, and 1 year, which met a satisfactory level. The eddy currents’ appearance was verified by local knowledge. We found recirculating currents near the riverbank to the East (right at the riverbank failures), whose velocity was approximately half and 1/3–1/4 of the mainstream flow velocity in the dry and flood seasons, respectively. Our study approach performed well in revealing the eddy currents, which can aid in assessing potential riverbank failures and can be applicable to similar contexts.
    Type of Medium: Online Resource
    ISSN: 2073-4441
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2521238-2
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  • 8
    In: The Geographical Journal, Wiley, Vol. 189, No. 2 ( 2023-06), p. 329-341
    Abstract: Youth participation has become an important element of environmental governance and is also a way that young people learn about the expectations of citizenship. In the global South, young people are confronted with multiple understandings of citizenship as international development organisations may introduce citizenship in a liberal, democratic framing which may differ from national citizenship norms. In Vietnam, state agencies have a history of supporting youth participation linked to nation building and community service. These activities create an imaginary which highlights citizenship as a status and the national scale as being central. More recently, liberalisation policies have opened the door for activities of international organisations which extend imaginaries of citizenship to the global scale and beyond status to a process centred on creating a sense of belonging. Other forms of participation are also flourishing, thanks to the increasing reach of social media. This paper explores how the diversity of this landscape creates liminal spaces of citizenship which young people navigate, working within and between different scales and imaginaries.
    Type of Medium: Online Resource
    ISSN: 0016-7398 , 1475-4959
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 3040-5
    detail.hit.zdb_id: 2038485-3
    SSG: 14
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  • 9
    Online Resource
    Online Resource
    Insight Society ; 2023
    In:  International Journal on Advanced Science, Engineering and Information Technology Vol. 13, No. 1 ( 2023-02-23), p. 250-259
    In: International Journal on Advanced Science, Engineering and Information Technology, Insight Society, Vol. 13, No. 1 ( 2023-02-23), p. 250-259
    Abstract: Indigenous knowledge (IK) can provide useful information on local people's activities within environmental contexts. For countries vulnerable to climate change as Vietnam, research on IK might assist in revealing information about local people's responses to environmental stresses and potentially support decision-making. To enrich the study context in this field, this study aims at determining the IK of peanut cultivation of the Khmer ethnic groups. The study site is in the mountainous area in An Giang province, Vietnam, where the Khmer people are located. The methods of documentary collection, focus group discussion, semi-structured interviews, and experiments were applied in this study. The investigation results showed the innovation of local people in the cultivation. For instance, applying cow manure to a sandy soil can reduce chemical fertilizers and improve peanut yield. The IK reported that the application of the broadcasting method could achieve the cultivation economic profit approximately 2.5 times higher than the dibbling method. The former method is mostly preferred due to its time/labor saving and the growing aged population in the study location. The experimental results indicated that the combination of indigenous and scientific knowledge in peanut cultivation, such as chemical fertilizer application, crop calendar, crop rotation, and varieties, could bring high economic efficiency, improve soil nutrients, and ability to adapt to climate change. The research approaches in this study comprehensively revealed the IK, which can be potentially applicable to similar studies.
    Type of Medium: Online Resource
    ISSN: 2460-6952 , 2088-5334
    URL: Issue
    Language: Unknown
    Publisher: Insight Society
    Publication Date: 2023
    detail.hit.zdb_id: 2687619-X
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  • 10
    Online Resource
    Online Resource
    College of Graduate Studies, Walailak University ; 2022
    In:  Trends in Sciences Vol. 20, No. 2 ( 2022-12-22), p. 6390-
    In: Trends in Sciences, College of Graduate Studies, Walailak University, Vol. 20, No. 2 ( 2022-12-22), p. 6390-
    Abstract: Rice is the essential food crop of An Giang Province. Vietnam and the whole world are facing several problems hindering climate change, such as increased temperature and CO2 concentration that many manufacturers’ companies and managers need to estimate output to make production plans or adjust policies. In this study, the model known as SIMPLE was applied to simulate the biomass and yield of rice in 2 crop seasons Autumn - Winter 2020 (AW) and Winter - Spring 2020 - 2021 (WS), in Cho Moi district, An Giang province, Vietnam (10° 23' 47"N, 105° 27' 41"E) and analyzed the effects of climate variabilities and scenarios on simulation results. Heat stress showed a relatively negative impact on the growth and development of rice in AW more seriously than WS due to climate variabilities. Climate change scenario RCP8.5 (RCP - Representative Concentration Pathway) has predicted that atmosphere temperature may increase above 4 °C and CO2 concentration to reach 900 ppm by the end of the 21st century. As a result, from the model, for every 100 ppm CO2 concentration increase, the cumulative rice biomass increased by 8 and 10 % in AW and WS, respectively. Moreover, conditions assumed from the model that increased 5 °C caused a decrease in cumulative biomass up to 7.2 % in AW season compared to 3.1 % in WS season. However, with responses of 5 °C increasing in the model, rice yield decreased relatively rapidly from 8.5 % in AW and 7 % WS. HIGHLIGHTS The model known as SIMPLE has been used in this study RMSE of our model differs from the observed yield from 4.2 % (Winter-Spring crop-WS) to 5.5 % (Autumn-Winter crop-AW) For every 100-ppm CO2 concentration increased, the cumulative rice biomass increased by 8 and 10 % in AW and WS, respectively Increasing 5 °C, rice yield decreased 8.5 % in AW and 7 % WS Sensitivity analysis showed that RUE (Radiation Use Efficiency) has the most influencing factor on rice yield GRAPHICAL ABSTRACT 
    Type of Medium: Online Resource
    ISSN: 2774-0226
    Language: Unknown
    Publisher: College of Graduate Studies, Walailak University
    Publication Date: 2022
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