TAP CHI SINH HOC最新文献_第7页

Study on the effect of single and mixtured of cobalt nanoparticles on the change of photosynthesis parameters and antioxidant enzymes activity of soybean seedlings glycine max (l.) merr. (DT26) 单粒和混合钴纳米颗粒对大豆幼苗甘氨酸max (1) merr光合参数和抗氧化酶活性变化的影响研究。(DT26)

TAP CHI SINH HOC Pub Date : 2018-06-30 DOI: 10.15625/0866-7160/V40N2.11071

Phan Hoàng Tuấn, L. T. Tam, H. L. Anh, N. H. Thu, N. Chau, D. D. Hong

{"title":"Study on the effect of single and mixtured of cobalt nanoparticles on the change of photosynthesis parameters and antioxidant enzymes activity of soybean seedlings glycine max (l.) merr. (DT26)","authors":"Phan Hoàng Tuấn, L. T. Tam, H. L. Anh, N. H. Thu, N. Chau, D. D. Hong","doi":"10.15625/0866-7160/V40N2.11071","DOIUrl":"https://doi.org/10.15625/0866-7160/V40N2.11071","url":null,"abstract":"Soybean (Glycine max (L) Merr.) is one of the major crops grown worldwide for human food and animal feed. Nanotechnology is one of the most potential tools in modern agriculture to improve crop productivity. In this paper, we investigated the effect of single and mixture cobalt nanoparticles on the change of photosynthesis - related parameters and antioxidant enzyme activity of soybean Glycine max (L) Merr “DT26” at different growth stages under pilot scale. The results showed that all form of cobalt nanoparticles treatment enhanced the photosynthesis of soybean by increasing the content of chlorophyll a, Pn and the ratio of Fv/Fm. These values tended to increase and reached the maximum value at fifth trifoliate stage and then decreased at the beginning bloom stage. The activity of antioxidant enzymes such as superoxide dismutase and peroxidase (when seeds were treated with USA single colbalt nanoparticles at concentration of 16.67 mg/kg) and catalase (with USA single colbalt nanoparticles at concentration of 0.17 mg/kg) were increased in 2.11, 1.85 and 1.60 times respectively compared to the control group (without the treatment of colbalt nanoparticles) while ascorbate peroxidase was reached highest value (increased in 2.73 times) under the condition of Vietnam single colbalt nanoparticles at the dose of 0.17 mg/kg seeds. This suggests that cobalt nanoparticles treatment has generated oxidative stresses and soybean DT26 has the self-protection mechanism by increasing the activity of antioxidant enzymes in order to reduce the amount of H2O2 and O2 which accumulates in the leaf cells.","PeriodicalId":409863,"journal":{"name":"TAP CHI SINH HOC","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127580896","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

Characteristics of gap regeneration in mangrove forests of Dong Rui, Tien Yen, Quang Ninh 东瑞、天延、广宁红树林林隙更新特征

TAP CHI SINH HOC Pub Date : 2018-06-30 DOI: 10.15625/0866-7160/V40N2.13243

Nguyen Hoang Hanh, M. Tuấn, P. H. Tinh, N. Hanh

{"title":"Characteristics of gap regeneration in mangrove forests of Dong Rui, Tien Yen, Quang Ninh","authors":"Nguyen Hoang Hanh, M. Tuấn, P. H. Tinh, N. Hanh","doi":"10.15625/0866-7160/V40N2.13243","DOIUrl":"https://doi.org/10.15625/0866-7160/V40N2.13243","url":null,"abstract":"Field surveys using unmanned aerial vehicle monitoring were conducted in combination with satellite image analysis to evaluate the characteristics of gaps inside mangrove forest vegetation in Dong Rui commune, Tien Yen district, Quang Ninh province as well as the natural regeneration inside these gaps. A total of 15 gaps was located in four survey plots totaling 22,500 m2, among which four different types of mangrove forest communities were found, being dominated by (1) Bruguiera gymnorrhiza; (2) Aegriceras corniculatum, Kandelia obovata, Rhizophora stylosa and Bruguiera gymnorrhiza; (3) Bruguiera gymnorrhiza, Rhizophora stylosa; and (4): Aegriceras corniculatum, Kandelia obovata, respectively. Based on observations from 2012 to 2018, changes in regenerated tree densities were similar between gaps with a poor diversity of 2–5 species resembling the composition of the surrounding canopy. In some gaps, species not found in the nearby vegetation were observed with lower densities. Thus, the regeneration and patching of the mangrove forest gaps in Dong Rui were quite uniform at a midium rate. Species composition inside gaps did not differ significantly from the surrounding magrove forest communities. However, the ecological dominance of each species varied over time, depending on several natural factors and human actitvities where gaps were formed..","PeriodicalId":409863,"journal":{"name":"TAP CHI SINH HOC","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114149270","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: 2

Optimisation of rice bran hydolysation using xylanase for xylooligosacchride production 木聚糖酶水解米糠生产低聚木糖的工艺优化

TAP CHI SINH HOC Pub Date : 2018-06-30 DOI: 10.15625/0866-7160/v40n2.9931

N. Phuong, Nguyen Hoa Anh, P. Ngoc, Quach Thi Lien, N. T. Bich

{"title":"Optimisation of rice bran hydolysation using xylanase for xylooligosacchride production","authors":"N. Phuong, Nguyen Hoa Anh, P. Ngoc, Quach Thi Lien, N. T. Bich","doi":"10.15625/0866-7160/v40n2.9931","DOIUrl":"https://doi.org/10.15625/0866-7160/v40n2.9931","url":null,"abstract":"Rice bran is a subsidised product of rice processing. It is rich in carbohydrate, especially xylan therefore, has being used for production of soluble fiber oligosaccharide including xylooligosaccharides (XOS). XOS is an oligomer of 2-7 xylose residues and has been proven to be fermented by beneficial bacteria Bifidobacterium and Lactobacillus in colon. The market for XOS is increasing rapidly due to its advantages in biological and technological properties, compared to other common oligosaccharides, such as fructooligosaccharide or galactooligosaccharide. XOS can be produced from rice bran using either chemical or enzymatic hydrolysation technologies. The hydrolyzation using β-1,4-xylanase is commonly used to produce XOS from rice bran. However, an appropriate technology for XOS production from rice bran with high purity and food safety in Vietnam is not available yet. This paper presents new data on optimisation of rice bran hydrolyzation by xylanase to produce XOS using the quadratic model of Box-Behnken. The theoretically optimized conditions for the hydrolyzation are 0.25% enzyme at pH 5.5, temperature of 50°C for 18 hours. Experimental data confirmed the selected condition. The XOS product contains mainly xylobiose, xylotriose and xylotetraose.","PeriodicalId":409863,"journal":{"name":"TAP CHI SINH HOC","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130347911","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

Investigating the frequency of alleles of crtRB1 and LcyE genes that are favoable for -carotene accumulation in some maize lines cultivated in VietNam 研究了在越南栽培的一些玉米品系中有利于-胡萝卜素积累的crtRB1和LcyE基因等位基因的频率

TAP CHI SINH HOC Pub Date : 2018-06-30 DOI: 10.15625/0866-7160/v40n2.13239

T. Luong, N. D. Thanh

引用次数: 1