Ministry of Science and Technology, Vietnam最新文献_第5页

Validation of the blood glucose testing method on the Accu-chek Inform II 在 Accu-chek Inform II 上验证血糖测试方法

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).68-74

Thi Ngoc Lan Nguyen, Hoang Bich Nga Le, Thanh Huyen Tran, Thi Thuy Quynh Tran

{"title":"Validation of the blood glucose testing method on the Accu-chek Inform II","authors":"Thi Ngoc Lan Nguyen, Hoang Bich Nga Le, Thanh Huyen Tran, Thi Thuy Quynh Tran","doi":"10.31276/vjst.66(1).68-74","DOIUrl":"https://doi.org/10.31276/vjst.66(1).68-74","url":null,"abstract":"Blood glucose testing, including capillary blood glucose, is the recommended test for the diagnosis and monitoring of diabetes treatment. Currently, capillary blood glucose testing is performed on point-of-care testing (POCT) with reasonable cost, fast time, convenience, supporting timely diagnosis and treatment. However, in order to select POCT devices that meet quality standards, it is necessary to strictly control the laboratory. Object and method: Confirmation of the capillary blood sugar testing method on the Accu-chek Inform II (Acc-II) machine including the following indicators: accuracy, precision, linear range, comparison of test results according to the recommendations of the Clinical & Laboratory Standards Institute (CLSI) (EP15A3, EP06A, EP09A3). The authors compared results on the testing machine in the central laboratory (Cobas 8000) of blood glucose testing on the POCT machine with the results of whole capillary blood, whole venous blood, and plasma venous samples. Results: Precision, accuracy, and linearity were confirmed as published. The linear range of the method is from 1.6 to 31 mmol/l. The difference between capillary blood glucose pairs and plasma venous glucose, whole blood venous glucose on Accu-chek Inform II and plasma venous blood glucose on Cobas 8000 machine are 6.89, -8.62, and -10.97%, respectively.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"123 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495497","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

The influence of polysiloxane on the mechanical properties and water repellency of cotton fabrics 聚硅氧烷对棉织物机械性能和防水性的影响

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).50-55

V. V. Nguyen, Thi Hang Pham, D. P. Huynh

{"title":"The influence of polysiloxane on the mechanical properties and water repellency of cotton fabrics","authors":"V. V. Nguyen, Thi Hang Pham, D. P. Huynh","doi":"10.31276/vjst.66(1).50-55","DOIUrl":"https://doi.org/10.31276/vjst.66(1).50-55","url":null,"abstract":"Cotton fabric is commonly used in the textile industry owing to good ventilation and absorption capacity. However, dirt resistance and water resistance of cotton fabrics are low. Therefore, coating cotton fabrics with water-repellent polysiloxane is a special requirement for outdoor and protective clothing products. The effects of polysiloxane content on the water resistance and mechanical properties of materials were studied. The morphology of coated cotton fabric was characterised by SEM (Scanning electron microscope), and EDX (Energy dispersive X-ray) was used to determine the presence of polysiloxane on the surface of cotton fabric. The effects of polysiloxane content on the water resistance and mechanical properties of materials were studied. Compared with raw cotton fabrics, the tensile strength of the cotton fabrics impregnated with 20%wt polysiloxane solution increased, but the elongation at break was reduced. The hydrostatic pressure (AATCC 127) and water spray test (AATCC 22) results showed that the water repellence of polysiloxane-coated cotton fabrics increased significantly compared to pure cotton fabrics. In addition, the polysiloxane content has no almost effect on the water repellency of the material. Therefore, the appropriate use of polysiloxane can contribute to minimising the cost of the product.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"11 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495092","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

Application of DNA barcode ITS2to identify herbal medicinal materials 应用 DNA 条形码 ITS2 识别中药材

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).24-28

Tien Dung Nguyen, Thi Thu Ha Tran, Duc-Huy Nguyen, Ngoc-Ai Trinh, Phi Hung Nguyen

{"title":"Application of DNA barcode ITS2to identify herbal medicinal materials","authors":"Tien Dung Nguyen, Thi Thu Ha Tran, Duc-Huy Nguyen, Ngoc-Ai Trinh, Phi Hung Nguyen","doi":"10.31276/vjst.66(1).24-28","DOIUrl":"https://doi.org/10.31276/vjst.66(1).24-28","url":null,"abstract":"Nowadays, the demand for using herb plants to treat and protect human health is increasing. Along with the growing herbal market, the adulteration of herbal medicinal materials is increasing in many countries, including Vietnam. It is difficult to determine the origin of herbal medicinal materials by morphological or chemical methods when they are substituted by herbs from closely related species or adulterated intentionally by materials from unrelated plants or processed materials. Therefore, it is necessary to use molecular methods based on DNA markers. ITS is a highly conservative nuclear ribosomal marker that has been widely used in the identification of plant species. In this study, the ITS2 marker was used to identify 8 herbal medicinal materials, including 2 samples of polyscias(DLTN, DLBG), 2 samples of morinda (BKTN, BKQN), 2 samples of black zingiber (GDTN, GDYB) and 2 samples of black curcuma (NDTN, NDYB). Gene analysis and sequencing results showed that the DLTN and DLBG were Polyscias fruticosa; BKTN and BKQN were different species, Gynochthodes officinalis (BKTN) and Morinda officinalis (BKQN); GDTN and GDYB were Kaempferia parviflora; NDTN and NDYB were Curcuma caesia. The research results show that the ITS2 indicator can be used to identify medicinal species.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495456","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

Degradation of organophosphate flame retardants by a consortium of bacterial strains isolated from the To Lich river, Hanoi 河内 To Lich 河中分离出的细菌菌株群对有机磷阻燃剂的降解作用

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).08-13

Thi Lan Anh Nguyen, Thi Thu Hien Tran, Thi Phuong Pham, Thi Thu Hien Tran, Hai Yen Dao

{"title":"Degradation of organophosphate flame retardants by a consortium of bacterial strains isolated from the To Lich river, Hanoi","authors":"Thi Lan Anh Nguyen, Thi Thu Hien Tran, Thi Phuong Pham, Thi Thu Hien Tran, Hai Yen Dao","doi":"10.31276/vjst.66(1).08-13","DOIUrl":"https://doi.org/10.31276/vjst.66(1).08-13","url":null,"abstract":"Organophosphate flame retardants (OPFRs) are degraded by a consortium of 10 bacterial strains isolated from the To Lich river, contaminated with OPFRs. The bacterial consortium is cultured in an A-Cl medium supplemented individually with OPFRs (10 mg/l), resulting in optical density at 600 nm ranging from 1 to 1.5. The consortium of 10 bacterial strains exhibits the ability to degrade tris(2-ethylhexyl) phosphate (TEHP) by 98.5 and 100% after two and three days of cultivation, respectively. Triethyl phosphate (TEP) is also degraded by 76.1 and 100% after two and five days of cultivation, respectively. The degradation efficiency of trimethyl phosphate (TMP), tris(2-chloroethyl) phosphate (TCEP), tris(1,3-dichloro-2-propyl) phosphate (TCDPP), and tributoxy ethyl phosphate (TBEP) is also in the range of 97 to 100% after four days of cultivation. In the experiment adding a mixture of 7 substances in OPFRs at a concentration of 10 mg/l for each compound, only TEHP is completely degraded after six days of cultivation. The degradation efficiency of other OPFRs increases from 93.2 to 100% after six days of cultivation. Comparing the degradation rates of OPFRs in both experiments, the results indicate that the cultures supplemented with each compound individually exhibit a faster degradation rate than when a mixture of OPFRs compounds is added.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"37 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495013","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

Preparation of nano zinc borate and investigation of flame-retardancy of ternary combination nano zinc borate/red phosphorus/expandable graphite on HDPE 纳米硼酸锌的制备及纳米硼酸锌/红磷/可膨胀石墨三元组合在高密度聚乙烯上的阻燃性能研究

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).56-61

Thi Hanh Nguyen, Thi Nhung Hac, Van Toan Hoang, Nhat Thuy Giang Le, Mai Ha Hoang, Van Tuyen Nguyen

{"title":"Preparation of nano zinc borate and investigation of flame-retardancy of ternary combination nano zinc borate/red phosphorus/expandable graphite on HDPE","authors":"Thi Hanh Nguyen, Thi Nhung Hac, Van Toan Hoang, Nhat Thuy Giang Le, Mai Ha Hoang, Van Tuyen Nguyen","doi":"10.31276/vjst.66(1).56-61","DOIUrl":"https://doi.org/10.31276/vjst.66(1).56-61","url":null,"abstract":"Nano zinc borates were successfully synthesised from aqueous solutions of zinc sulfate, boric acid, and sodium hydroxide via the precipitation method. The effects of pH, temperature, and surfactants on the structure and morphologies of nano zinc borates were investigated. The nano zinc borates obtained at the pH of 7 to 8 were well-crystallised monophase Zn[B3O4(OH)3]. The morphologies of nano zinc borates were highly impacted by the reaction temperature and the surfactants. At the range of temperatures from 70 to 80oC, the nano zinc borates were nanoplates of 40-50 nm in thickness. The nano zinc borates grew out of the surface to form nanorods at 90oC and nanowhiskers at 100oC. The nano zinc borates modified with surfactants tended to form larger and thinner plate-like nanoparticles. In the presence of Tween 80, petal-like nano zinc borates were achieved. The petal-like nano zinc borates showed good flame retardant synergistic effects with red phosphorus and expandable graphite on high-density polyethylene matrix. Additionally, the nano zinc borates nanopetals significantly improved the mechanical properties of red phosphorus/expandable graphite/high-density polyethylene composites.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"10 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495887","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

Development of expression vector with the Pgrac100 promoter induced by IPTG and integrated gfp+ gene into Bacillus subtilisgenome at lacA locus 开发带有 IPTG 诱导的 Pgrac100 启动子的表达载体，并将 gfp+ 基因整合到枯草芽孢杆菌基因组的 lacA 基因座上

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).75-80

Thi Bich Phuong Chu, D. Nguyen, Thi Phuong Trang Phan

引用次数: 0

Chemical components and antimicrobial activity of essential oil from leaf of Aristolochia balansae Franch. 马兜铃叶精油的化学成分和抗菌活性

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).14-18

Dam Ngoc Anh Luu, Van Huong Bui, Van Truong Do, Thi Kieu Oanh Nguyen

{"title":"Chemical components and antimicrobial activity of essential oil from leaf of Aristolochia balansae Franch.","authors":"Dam Ngoc Anh Luu, Van Huong Bui, Van Truong Do, Thi Kieu Oanh Nguyen","doi":"10.31276/vjst.66(1).14-18","DOIUrl":"https://doi.org/10.31276/vjst.66(1).14-18","url":null,"abstract":"Aristolochia balansae Franch. belonging to Aristolochiasubgenus Siphisia (Aristolochiaceae) is rarely distributed in Northern Vietnam. This study is the first time to determine the chemical composition and antimicrobial activity from essential oils of leaves collected in Ba Thuoc district, Thanh Hoa province in November 2021. The essential oils from the leaves of A. balansae were obtained by hydrodistillation using Clevenger-type apparatus and analysed by gas chromatography coupled with mass spectrometry. The yield of the essential oil was 0.15% of fresh weight, the essential oil is light yellow, lighter than water. Sixty-three components were identified, which present 78.58% of the total composition of the leaf’s essential oil. The main components were sesquiterpenes and oxygenated sesquiterpenes. The constituents occurring in higher amounts in the essential oil were γ-Eudesmol (6.98% of the total composition of the leaf’s essential oil), α-Humulene (6.22%), β-Selinene (4.5%), Eudesma-4(14),7(11)-diene (3.53%), α-trans-Bergamotene (3.27%), and Limonene (3.02%). This essential oil showed weak antimicrobial activities to most of the tested microbial strains in a concentration of 10%.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"33 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495787","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

Accumulation of mercury in muscle of orange-spotted spinefoot(Siganus guttatus Bloch, 1787) by age and season in the coastal Quang Binh 广平沿海桔斑棘脚鹦鹉（Siganus guttatus Bloch, 1787）肌肉中按年龄和季节划分的汞积累情况

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).36-41

Van Thiep Vo, Thi Thu Phuong Le, Thi Huong Binh Nguyen

引用次数: 0

Optical properties of Eu3+ - doped Sr2TiO4 phosphor powder synthesised by solid-phase reaction method 固相反应法合成的 Eu3+ - 掺杂 Sr2TiO4 荧光粉的光学特性

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).62-67

V. Chu, Thi Anh Xuan Chu, Thi Hue Lo, Minh Quy Bui, Thi Tam Khieu, Phuong Thao Nguyen, Kim Dan Ho, Tien Ha Le

{"title":"Optical properties of Eu3+ - doped Sr2TiO4 phosphor powder synthesised by solid-phase reaction method","authors":"V. Chu, Thi Anh Xuan Chu, Thi Hue Lo, Minh Quy Bui, Thi Tam Khieu, Phuong Thao Nguyen, Kim Dan Ho, Tien Ha Le","doi":"10.31276/vjst.66(1).62-67","DOIUrl":"https://doi.org/10.31276/vjst.66(1).62-67","url":null,"abstract":"Fluorescent powder Sr2TiO4 doped with Eu3+ ions was synthesised by the solid-phase reaction method with a sintering temperature of 1200oC in the air with a 1-6% doping concentration. The resulting material has a perovskite structure of I4/mmm space group, and the Eu3+ ion doping concentration does not change the material’s structure. This characteristic space group of the material was also investigated through the Raman scattering spectrum with characteristic peaks at positions 145, 240, 448, and 699 cm-1 corresponding to vibrational modes with 2A1g + 2Egcharacteristic states of Sr2TiO4 material. The results showed that the material absorbs strongly in the ultraviolet and blue light regions with characteristic peaks of the Sr2TiO4 matrix and Eu3+ ions to emit strongly in the red light region with characteristic emission peaks of Eu3+ ions in the background network when moving from the excited state 5D0 to state 7Fj (j is a positive integer number). Fluorescence quenching was also observed at a doping concentration of 4% Eu3+ ions. The fabricated material is suitable for coating applications on nUV-LED LED chips.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140496411","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 on production and testing of antifungal activity Phytophthora spp. causing fruit rot and Colletotrichum spp. causing anthracnose of silver nanoparticles, chitosan and turmeric resin bioproducts 纳米银颗粒、壳聚糖和姜黄树脂生物产品的生产和抗真菌活性测试研究，这些产品可引起果实腐烂病的噬菌目和引起炭疽病的 Colletotrichum spp.

Ministry of Science and Technology, Vietnam Pub Date : 2024-01-25 DOI: 10.31276/vjst.66(1).42-49

Duc Danh Cao, The Tam Le, Van Binh Thai, Thi Ngan Tran, Dang Quang Le, D. Ho, Cao Cuong Nguyen, Thi Ha Nguyen, Thi Thu Hiep Le, Phuong Chi Tran, Thi Ngan Duong

{"title":"Research on production and testing of antifungal activity Phytophthora spp. causing fruit rot and Colletotrichum spp. causing anthracnose of silver nanoparticles, chitosan and turmeric resin bioproducts","authors":"Duc Danh Cao, The Tam Le, Van Binh Thai, Thi Ngan Tran, Dang Quang Le, D. Ho, Cao Cuong Nguyen, Thi Ha Nguyen, Thi Thu Hiep Le, Phuong Chi Tran, Thi Ngan Duong","doi":"10.31276/vjst.66(1).42-49","DOIUrl":"https://doi.org/10.31276/vjst.66(1).42-49","url":null,"abstract":"In this paper, the research team made samples of bio-products (BN) of turmeric resin combined with silver nanoparticles and chitosan and investigated the factors affecting the production of BN preparations. Specifically, the results of research on the production of BN preparations including ingredients, additives, mixing ratios, and technological parameters have been calculated and tested to obtain nano-preparations with the highest durability and dispersion. The experimental results obtained the optimal set of parameters for production at a pilot scale of 5 litres/batch are the ratio of active ingredients/additives =3/1, the optimal temperature for the mixing process is 40-45oC, the stirring speed is 500 rpm, and the time is 60 minutes. From here, we have successfully fabricated 18 samples of BN1-BN18 preparations with colours ranging from light yellow to dark yellow. Antifungal activity was tested against Colletotrichum spp. causing anthracnose disease and fruit rot disease caused by Phytophthora spp., the results showed that BN1-BN18 products exhibited good antifungal activity, and antifungal activity increased gradually when the content of turmeric oil resin increased.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495529","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