Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam最新文献_第6页

Determination of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) in paper-based food packaging samples 纸质食品包装样品中全氟辛酸和全氟辛烷磺酸的测定

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-16 DOI: 10.47866/2615-9252/vjfc.4006

Lieu Tran Thi, Lan Phuong Kieu Thi, Thu Hang Do Thi, Anh Hoang Quoc, Quynh Hoa Nguyen Thị, Khanh Doan Duy, T. Le Huu, Anh Huong Nguyen Thi, Hien Dang Thu

引用次数: 0

Determination of ethylene oxide and 2-chloroethanol in food by triple quadrupole GCMS/MS, combined with QuEChERS extraction 三重四极柱气相色谱-质谱联用- QuEChERS萃取法测定食品中环氧乙烷和2-氯乙醇

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-13 DOI: 10.47866/2615-9252/vjfc.3950

Nu Nguyen Duong Nguyen, Nhan Truong Van, Tam Le Thanh, Duy Nguyen Thanh, Kiet Ly Tuan, Dong Nguyen Van

{"title":"Determination of ethylene oxide and 2-chloroethanol in food by triple quadrupole GCMS/MS, combined with QuEChERS extraction","authors":"Nu Nguyen Duong Nguyen, Nhan Truong Van, Tam Le Thanh, Duy Nguyen Thanh, Kiet Ly Tuan, Dong Nguyen Van","doi":"10.47866/2615-9252/vjfc.3950","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3950","url":null,"abstract":"In this study, ethylene oxide (EO), a fumigant for agricultural products, and its metabolite (2-chloroethanol, 2-CE), were extracted by QuEChERS method, and then quantified by GC-MS/MS system. Samples were extracted with acetonitrile, and cleaned up with a mixture of dispersive solid phase extraction (d-SPE), including MgSO4, PSA, C18 and GCB, within less than 20 min. The method has been validated on spices, oils, noodle, and food packaging. The results show that this method was high accuracy and precision at spike concentrations, with recovery ranged from 80 to 120%, and RSD lower than 20%. The limit of quantification was 0.01 mg/kg for both compounds, meeting the European (EU) maximum residue limit (MRL) at 0.01 mg/kg. This method has been applied to control the production of instant noodles, with 125 samples of ingredients (seasoning, dried vegetables, oil, flour, food packaging), instant noodles and other food. Among them, 13 ingredients detected 2-CE, and 1 spice detected both compounds, accounting for 11.2%. All 14 samples exceeded the EU MRL. ","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85873131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surveying the levels of mold and aflatoxin in maize and peanut in some households in Ea H’Leo, Cu M’Gra, Krong Pac districts in Daklak province in 2016 2016年对达克拉克省Ea H 'Leo、Cu M 'Gra和kronpac地区部分家庭玉米和花生中的霉菌和黄曲霉毒素水平进行了调查

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-12 DOI: 10.47866/2615-9252/vjfc.3960

Thuan Nguyen Vu, Oanh T Dang, Thanh Mai Nguyen Thi, Khuyen Dang Thi

{"title":"Surveying the levels of mold and aflatoxin in maize and peanut in some households in Ea H’Leo, Cu M’Gra, Krong Pac districts in Daklak province in 2016","authors":"Thuan Nguyen Vu, Oanh T Dang, Thanh Mai Nguyen Thi, Khuyen Dang Thi","doi":"10.47866/2615-9252/vjfc.3960","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3960","url":null,"abstract":"Agricultural products are contaminated with mold and aflatoxin, which not only reduces the value of agricultural products but also affects the health of people and animals when using such agricultural products. The survey was conducted on 150 samples (maize, peanut) in several households in Ea H'leo, Cu M'Gar, Krong Pac - Dak Lak districts, by the method of identifying mold Aspergillus flavus (A. flavus) and Aspergillus parasiticus (A. parasiticus) according to 52 TCN-TQTP 0001:2003 and 52 TCN-TQTP 0009:2004 and aflatoxin quantification according to TCVN 7596 - 2007. The results showed that among 150 samples (maize, peanut) in the analysis, there were (48.7%) samples contaminated with mold exceeding the allowable level, for maize (56.6%), peanuts (33.3%). There was the presence of A. flavus in maize sample (14.1%) and peanut samples (11.8%), and A. parasiticus was not found in the samples. While, the prevalence of AF contamination in agricultural products (maize, peanuts) accounted for (12.7%). In which, the rate of AF contamination in maize samples was 17.2%, contaminated rate of peanut samples was 3.9%; Aflatoxin contaminated samples exceeded the allowable limit for maize was 14.1% and this rate of peanut sample was 3.9%. ","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87830622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First step in development and evaluation simultaneous determination of mycotoxins in cereals by liquid chromatography - mass spectrometry 液相色谱-质谱法同时测定谷物中真菌毒素的初步研究

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-12 DOI: 10.47866/2615-9252/vjfc.3959

Vinh Nguyen Huu, Thao Nguyen Hong, Tuan Nguyen Cong, Nghia Tran Vuong Duc, Quyen Ho Tran Ngoc, Tin Nguyen Huu, Cong Nguyen Thanh, Viet Ngo Quoc

{"title":"First step in development and evaluation simultaneous determination of mycotoxins in cereals by liquid chromatography - mass spectrometry","authors":"Vinh Nguyen Huu, Thao Nguyen Hong, Tuan Nguyen Cong, Nghia Tran Vuong Duc, Quyen Ho Tran Ngoc, Tin Nguyen Huu, Cong Nguyen Thanh, Viet Ngo Quoc","doi":"10.47866/2615-9252/vjfc.3959","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3959","url":null,"abstract":"Currently, solid phase extraction (SPE) with immunoaffinity columns is applied in most standardized methods for mycotoxin determination to purify extracts and analysis by HPLC-FLD, HPLC-UV/VIS or LC-MS/MS. Therefore, sample preparation and analysis by instruments are time-consuming and high operating costs. The novel method allow simultaneously identify nine mycotoxin compounds with selective, stable and accurate results. The new method has been evaluated through three stages including validation as requirements of CEN/TR 16059:2010 (phase 1), comparison with current standard methods (phase 2), evaluate the method using an interlaboratory comparison program (phase 3). Cereal samples were extracted by QuEChERS and analyzed by LC-MS/MS. The limit of quantitation (LOQ) was 0,5 μg/kg for each aflatoxin compound and 40 μg/kg, 25 μg/kg, 1 μg/kg, 75 μg/kg for deoxynivalenol, zearalenone, ochratoxin A, each toxin fumonisin (B1&B2), respectively. The recovery is in the range of 70-120%, relative standard deviation RSD < 20%. The novel method also gives the same results compared to the individual standardized methods, using the immunoaffinity column in the extraction stage. At the present, the method is being evaluated through an interlaboratory comparison program with two rounds: round 1 (for survey) and round 2 (official round), which is expected to be implemented in 2022. ","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"239 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75658667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research for the yeast inhibiting ability of sorbic acid and cycloheximide applied to the quantitative analysis of Lactobacillus spp. 山梨酸和环己亚胺对酵母抑制能力的研究，应用于乳酸杆菌的定量分析。

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-09 DOI: 10.47866/2615-9252/vjfc.3954

Anh Vu Truong Huynh, Khue Tu Nguyen Hoang, Tung Luong Son, Ha Huynh Yen, Hai Chu Van

{"title":"Research for the yeast inhibiting ability of sorbic acid and cycloheximide applied to the quantitative analysis of Lactobacillus spp.","authors":"Anh Vu Truong Huynh, Khue Tu Nguyen Hoang, Tung Luong Son, Ha Huynh Yen, Hai Chu Van","doi":"10.47866/2615-9252/vjfc.3954","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3954","url":null,"abstract":"The ability of sorbic acid and cycloheximide to inhibit yeast was investigated on nine yeast strains isolated from different sources. Sorbic acid was added to MRS agar at two concentrations 0.01 g/L (TCVN 5522:1991) and 1.4 g/L (TCVN 7906:2008). The results showed, at both concentrations; the inhibitory effect of sorbic acid on yeast strains was weak. In contrast, the survey results of MRS agar supplemented with cycloheximide with concentration ranges of 0.02; 0.04; 0.06; 0.08; and 0.10 g/L were inhibited yeast strains. The performance testing of MRS agar supplemented with 0.05 g/L of cycloheximide tested with productivity ratio (0.7 ≤ PR ≤ 1.4) and selectivity factor (SF ≥ 2) according to ISO 11133. Therefore, we determined ability to inhibit yeast from cycloheximide was higher than sorbic acid and suggested using MRS agar-supplemented cycloheximide with 0.05 g/L, pH 6.2 (after autoclaving) to establish the quantitative analysis of Lactobacillus spp. by the pouring plate technique, incubated at 37oC ± 1oC for 72 ± 3 hours. In addition, the research results contribute to improving the quantitative analysis of Lactobacillus spp. in order to ensuring the validity of results and providing scientific evidence for decisions on management of effective probiotic quality in Ho Chi Minh City, Vietnam. ","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86240515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collection of endemic actinomycetes capable of degrading Lindane in order to produce biological products for the treatment of pesticide pollution toward safe agricultural production 收集能够降解林丹的特有放线菌，以生产生物制品，治理农药污染，实现农业安全生产

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-09 DOI: 10.47866/2615-9252/vjfc.3928

Dong Luu Tran, Tung Vu Son, Phuong Vu Ha, Anh Hoang Quynh, Quynh Trang Tran Thi, Y. Nguyen Thi, Minh Nguyen Hong, T. T. Tran Thi, Nuong Nguyen Kim, Hai Pham The

{"title":"Collection of endemic actinomycetes capable of degrading Lindane in order to produce biological products for the treatment of pesticide pollution toward safe agricultural production","authors":"Dong Luu Tran, Tung Vu Son, Phuong Vu Ha, Anh Hoang Quynh, Quynh Trang Tran Thi, Y. Nguyen Thi, Minh Nguyen Hong, T. T. Tran Thi, Nuong Nguyen Kim, Hai Pham The","doi":"10.47866/2615-9252/vjfc.3928","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3928","url":null,"abstract":"Pesticide residues in the soil are a huge threat to agriculture. ɤ- hexachlorocyclohexan (Lindane or isomer ɤ -HCH) is one of the pesticides widely used in agriculture after 1945. Due to the harmful effects on health of Lindane, UNEP (United Nations Environment) Program - United Nations Environment Program) decided to stop the pollution of Lindane worldwide in 2005. However, with a long half-life, it is very difficult to control residual Lindane in soils. The purpose of this study is to isolate and select actinomycete strains capable of degrading Lindane in order to develop a biological product that can remove residual Lindane in agricultural soil in a safe and environmental-friendly manner. Basic actinomycete isolation methods have been applied in combination with a number of oriented isolation methods to evaluate the growth ability of actinomycetes on media with and without Lindane. The ability to degrade Lindane of actinomycetes was also evaluated based on the rate of chloride ion removal in the substrate. The remarkable actinomycetes were then studied for biological characteristics such as morphology, biochemical and physiological properties, and some metabolic activities related to the degradation of Lindane. We obtained 9 actinomycetes capable of decomposing Lindane isolated from soil samples in farms in Nghe An. Among them, the two strains A119 and LD02 belonging to the genus Streptomyces displayed the best Lindane degradation performance based on their chloride ion removals. They were further studied for their biological characteristics and eventually identified. ","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82441443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlling Ethylene Oxide residues in export food production at CJ Foods Vietnam Co., Ltd. CJ食品越南有限公司出口食品中环氧乙烷残留量的控制

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-08 DOI: 10.47866/2615-9252/vjfc.3956

Giang Nguyen Huong, Y. Nguyen Thi, Viet Phan Anh, Hong Phuc Nguyen Thi

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Knowledge and practice in preventing chemical contamination of food by producers, traders, consumers, and participants in food safety management in Lac Thuy district, Hoa Binh province in 2021 2021年，和平省Lac Thuy区的生产者、贸易商、消费者和食品安全管理参与者在预防食品化学污染方面的知识和实践

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-09-08 DOI: 10.47866/2615-9252/vjfc.3957

Hieu Nguyen Thanh, Nhung Ninh Thi, Kieu Chinh Pham Thi

{"title":"Knowledge and practice in preventing chemical contamination of food by producers, traders, consumers, and participants in food safety management in Lac Thuy district, Hoa Binh province in 2021","authors":"Hieu Nguyen Thanh, Nhung Ninh Thi, Kieu Chinh Pham Thi","doi":"10.47866/2615-9252/vjfc.3957","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3957","url":null,"abstract":"The situation of contaminated food is becoming more and more serious, especially the hazards of chemical contamination. Our study aims to determine the knowledge and practice in preventing chemical contamination of food of producers, traders, consumers and participants in food safety management in Lac Thuy district, Hoa Bình province. The results show that for producers and traders: 52.8% know that alkaline dyes are harmful to health, 13.3% know that there are substitutes for alkaline dyes. 17.1% of producers use food colorants in food processing and 81.6% of traders suspect that food has industrial colorants. For managers: 42.2% received training on food safety. The time of participating as an inspection collaborator was mainly from 1-5 years (58.5%). The tasks performed during the inspection were mainly assessment of sanitary conditions (47.1%) and assessment of raw materials and additives (30.4%). About consumers: 100% have heard of borax and food colorants, 93.3% and 94.6% think that if long-term consumption of food with industrial coloring, borax can cause chronic poisoning, 82.3% said that it is necessary to abolish the entire batch of goods if detecting food with industrial colorants, borax. ","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"123 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85399733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Survey on some food safety parameters of fresh ingredients in collective kitchens of factories and enterprises in Quang Ngai province in 2021 2021年广西省工厂企业集体厨房新鲜食材部分食品安全参数调查

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-08-31 DOI: 10.47866/2615-9252/vjfc.3943

C. Dang, Thu Dieu Huynh Thi, Dieu Linh Van Thi, Thanh Mai Van, Quang Nguyen Tien, Nhien Bui Duc, Ni Na Lam Thi, Xuan Hue Bui Thi, Cam Le Nguyen Thi

{"title":"Survey on some food safety parameters of fresh ingredients in collective kitchens of factories and enterprises in Quang Ngai province in 2021","authors":"C. Dang, Thu Dieu Huynh Thi, Dieu Linh Van Thi, Thanh Mai Van, Quang Nguyen Tien, Nhien Bui Duc, Ni Na Lam Thi, Xuan Hue Bui Thi, Cam Le Nguyen Thi","doi":"10.47866/2615-9252/vjfc.3943","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3943","url":null,"abstract":"The study was carried out on raw food materials including pork, fish of all kinds and leafy vegetables at collective kitchens, industrial catering establishments at factories and enterprises. in Quang Ngai province from January to November 2021. The study aims to: determine the percentage of fresh ingredients at the collective kitchens of factories and enterprises in the area of Quang Ngai province meeting food safety criteria and study some related factors between fresh ingredients meeting food safety criteria and the origin of fresh raw materials in the study area. The results by sampling method of cross-sectional study showed that: 100% of pork met with the lean substances Salbutamol, Clenbuterol, Cimaterol by quantitative method; 13.9% fish met safety criteria for urea by quantitative method; 53.4% of leafy vegetables met safety criteria for pesticides by qualitative method.","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89641560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Preliminary observation of microplastic contamination in some spice-salt samples purchased in Hanoi city 在河内市购买的一些香料盐样品中微塑料污染的初步观察

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-08-31 DOI: 10.47866/2615-9252/vjfc.3930

Da Le Nhu, Xuan Binh Phung Thi, Thu Ha Hoang Thi, Thuy Duong Thi, Anh Huong Nguyen Thi, Minh Loi Nguyen Thi, Phuong Quynh Le Thi

{"title":"Preliminary observation of microplastic contamination in some spice-salt samples purchased in Hanoi city","authors":"Da Le Nhu, Xuan Binh Phung Thi, Thu Ha Hoang Thi, Thuy Duong Thi, Anh Huong Nguyen Thi, Minh Loi Nguyen Thi, Phuong Quynh Le Thi","doi":"10.47866/2615-9252/vjfc.3930","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3930","url":null,"abstract":"Currently, plastic and microplastic pollution have become a common problem in many countries around the world, especially in developing countries, including Vietnam. Salt is the main ingredient in most of the spices used, but microplastic contamination has also been reported in seasalt samples in Vietnam. This paper presents the observation results of microplastic concentrations in some spice-salt samples that were purchased in the market in Hanoi, Viet Nam. The analysis results showed that the microplastic concentrations in the spice-salt samples varied in a wide range, from 320 to 1880 items/kg spice-salt. Microplastic fibers accounted for the majority (99%), whereas fragment forms accounted for a negligible proportion (1%). Microplastics were observed with a wide variety of colors, of which blue, red, and black were predominant. The results contribute to assessing the level of microplastic contamination in spice-salts in Hanoi city, Vietnam in order to give warnings and propose solutions to prevent and minimize microplastic contamination in spice-salt, for protecting the health of human consumers.","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75211704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0