Science and Technology Development Journal最新文献_第8页

Engineering yellow fluorescent protein probe for visualization of parallel DNA G-quadruplex 工程黄色荧光蛋白探针显示平行DNA g -四重体

Science and Technology Development Journal Pub Date : 2018-11-09 DOI: 10.32508/STDJ.V21I3.461

T. Truong, Trang T P Phan, Linh Le, D. Nguyen, H. Nguyen, D. T. Dang

引用次数: 1

Analysis of 12C+12C scattering using different nuclear density distributions 不同核密度分布下的12C+12C散射分析

Science and Technology Development Journal Pub Date : 2018-10-16 DOI: 10.32508/stdj.v21i3.431

Nguyen Dien Quoc Bao, Le Hoang Chien, C. Tao, Trịnh Hoa Lăng

引用次数: 0

Measurement of Indoor Radon Concentration in Dalat area 大叻地区室内氡浓度测定

Science and Technology Development Journal Pub Date : 2018-10-10 DOI: 10.32508/STDJ.V21I2.432

H. Le

引用次数: 3

Stability and activity of TG25P phage in control of Aeromonas hydrophila in striped catfish pond water TG25P噬菌体对条纹鲶鱼池水嗜水气单胞菌控制的稳定性及活性研究

Science and Technology Development Journal Pub Date : 2018-10-06 DOI: 10.32508/STDJ.V21I2.429

T. Xuân, H. A. Hoang, L. Tam

{"title":"Stability and activity of TG25P phage in control of Aeromonas hydrophila in striped catfish pond water","authors":"T. Xuân, H. A. Hoang, L. Tam","doi":"10.32508/STDJ.V21I2.429","DOIUrl":"https://doi.org/10.32508/STDJ.V21I2.429","url":null,"abstract":"Introduction: Striped catfish (Pangasianodon hypohthalmus) is a native freshwater fish species in the Mekong Delta, Vietnam, and significantly contributes to national aqua exports. Currently, however, the sustainable development of striped catfish farming is being affected by bacterial pathogen infections, of which hemorrhagic septicemia caused by Aeromonas hydrophila bacteria is one of the most common diseases. \u0000Methods: In this study, the stability of TG25P and CT45P phages to factors such as temperature, pH, and organic solvents was investigated, with the stability of TG25P being found to be higher than that of CT45P. \u0000Results: The activity of TG25P was retained to approximately 90% and 80% at 37oC and 50oC for 1 h, respectively. Its activity was maintained to greater than 80% at pH 5-9 for 24 h and approximately 90-100% in organic solvents, such as chloroform or diethyl ether, for 1 h. In addition, the stability and activity of TG25P for the control of A. hydrophila in striped catfish pond water was also evaluated for 48 h. \u0000Conclusion: TG25P was found to be highly applicable in the creation of low-cost phage-containing products for the prospective application of phage therapy in prevention and treatment of hemorrhagic septicemia in striped catfish. \u0000 ","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126674885","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: 4

Multiple Modal Features and Multiple Kernel Learning for Human Daily Activity Recognition 人类日常活动识别的多模态特征和多核学习

Science and Technology Development Journal Pub Date : 2018-10-03 DOI: 10.32508/STDJ.V21I2.441

V. Vo, Hoang M Pham

{"title":"Multiple Modal Features and Multiple Kernel Learning for Human Daily Activity Recognition","authors":"V. Vo, Hoang M Pham","doi":"10.32508/STDJ.V21I2.441","DOIUrl":"https://doi.org/10.32508/STDJ.V21I2.441","url":null,"abstract":"Introduction: Recognizing human activity in a daily environment has attracted much research in computer vision and recognition in recent years. It is a difficult and challenging topic not only inasmuch as the variations of background clutter, occlusion or intra-class variation in image sequences but also inasmuch as complex patterns of activity are created by interactions among people-people or people-objects. In addition, it also is very valuable for many practical applications, such as smart home, gaming, health care, human-computer interaction and robotics. Now, we are living in the beginning age of the industrial revolution 4.0 where intelligent systems have become the most important subject, as reflected in the research and industrial communities. There has been emerging advances in 3D cameras, such as Microsoft's Kinect and Intel's RealSense, which can capture RGB, depth and skeleton in real time. This creates a new opportunity to increase the capabilities of recognizing the human activity in the daily environment. In this research, we propose a novel approach of daily activity recognition and hypothesize that the performance of the system can be promoted by combining multimodal features. \u0000Methods: We extract spatial-temporal feature for the human body with representation of parts based on skeleton data from RGB-D data. Then, we combine multiple features from the two sources to yield the robust features for activity representation. Finally, we use the Multiple Kernel Learning algorithm to fuse multiple features to identify the activity label for each video. To show generalizability, the proposed framework has been tested on two challenging datasets by cross-validation scheme. \u0000Results: The experimental results show a good outcome on both CAD120 and MSR-Daily Activity 3D datasets with 94.16% and 95.31% in accuracy, respectively. \u0000Conclusion: These results prove our proposed methods are effective and feasible for activity recognition system in the daily environment. \u0000 ","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"31 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131745659","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

Evaluation the effect of several anticancer drugs on Vietnamese breast cancer cells 几种抗癌药物对越南乳腺癌细胞影响的评价

Science and Technology Development Journal Pub Date : 2018-09-27 DOI: 10.32508/stdj.v21i2.488

O. Nguyen

{"title":"Evaluation the effect of several anticancer drugs on Vietnamese breast cancer cells","authors":"O. Nguyen","doi":"10.32508/stdj.v21i2.488","DOIUrl":"https://doi.org/10.32508/stdj.v21i2.488","url":null,"abstract":"In Viet Nam, data from Conference of Cancer organized by the Ministry of Health has shown that breast cancer is the most popular cancer in women. Current mainly treatments are surgery, chemotherapy, and radiotherapy. However, the rate of recurrence after five years was very high. One of the causes of high relapse is cancer cells develop multidrug-resistant (MDR) thus reduced the efficiency of treatments. In this research, MTT assay was used for measured cell viability of Vietnamese breast cancer cells (VNBRCA cells) and positive control MCF-7 cell lines after treatment with several anticancer drugs as Doxorubicin (DOX), Tamoxifen (TAM), Mitomycin C (MMC) in 48h. After that, cancer cells were treated at haft maximal inhibitory concentration (IC50) of anticancer drug and observed cell morphology, apoptosis of cellular nuclear by AO/PI staining. IC50 value of VNBRCA cells with DOX, TAM, MMC were 0.641± 0.07 µM, 4.639 ± 0.933 µM and 1.338 ± 0.176 µM, respectively, which higher than IC50 of MCF-7 with DOX, TAM, MMC was 0.168 ± 0.037 µM, 7.085 ± 0.87 µM and 0.379 ± 0.159 µM, respectively. The response of VNBRCA cells with several anticancer drugs as DOX, TAM, and MMC was lower than the response of MCF-7, therefore, it showed that the specific features of VNBRCA cells; from which develop specific treatments for Vietnamese breast cancer patients.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122068894","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

Testing the Phillips curve in Vietnam 在越南测试菲利普斯曲线

Science and Technology Development Journal Pub Date : 2018-09-22 DOI: 10.32508/stdj.v19i1.527

Dandan Dang, Binh Vu

引用次数: 0

Determination of cysteamine in animal feeds by high performance liquid chromatography with diode-array detection (HPLC-DAD) 高效液相色谱-二极管阵列检测(HPLC-DAD)测定动物饲料中的半胱胺

Science and Technology Development Journal Pub Date : 2018-09-10 DOI: 10.32508/STDJ.V21I2.427

P. H. Nguyen

引用次数: 2

Research and design of an improved solar still for desalination 海水淡化用改进型太阳能蒸馏器的研究与设计

Science and Technology Development Journal Pub Date : 2018-08-31 DOI: 10.32508/STDJ.V21I2.423

Truong Thi Cam Trang, Dinh Pham, P. T. Phan

{"title":"Research and design of an improved solar still for desalination","authors":"Truong Thi Cam Trang, Dinh Pham, P. T. Phan","doi":"10.32508/STDJ.V21I2.423","DOIUrl":"https://doi.org/10.32508/STDJ.V21I2.423","url":null,"abstract":"Water is one of the most important resources on Earth because of its vital role for human beings and other living creatures. During the devastating drought in the Mekong Delta in 2016, millions of people had no access to the secure source of fresh water. This issue cautioned and influenced the Vietnamese government to find an effective desalination process for the coastal areas impacted heavily by salinization. However, desalination processes require large amounts of energy which can be a problem for the coastal areas due to the lack of energy and high cost. The main purpose of the study herein was to find an alternative solution for desalination by designing a desalination system using solar energy. The design was expected to provide a small size desalination system for households. The average output of the system was about 854 ml/day with the productivity at 2223.54 ml/day/m2. The average water capture efficiency was 80.5%, the salt elimination efficiency of the system was about 99.99%, and the salinity of the output water was below 2 ppm. The results are still far from ideal but they indicate a potential solution for coping with the shortage of fresh water in coastal areas.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123643084","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

Phenotypic and cytogenetic characterization of expanded adipose derived stem cells 扩大脂肪来源干细胞的表型和细胞遗传学特征

Science and Technology Development Journal Pub Date : 2018-06-21 DOI: 10.32508/STDJ.V21I1.426

N. Truong, A. Vu, Vuong M Pham

{"title":"Phenotypic and cytogenetic characterization of expanded adipose derived stem cells","authors":"N. Truong, A. Vu, Vuong M Pham","doi":"10.32508/STDJ.V21I1.426","DOIUrl":"https://doi.org/10.32508/STDJ.V21I1.426","url":null,"abstract":"Introduction: Human adipose derived stem cells (hASCs) have great potential for regenerative medicine. The demand for hASCs, especially in the development of off-the-shelf products, is increasing. Although the initial receipt of hASCs was relatively limited, there is now greater interest and also awareness that in vitro expansion of hASCs be further explored. The purpose of this study was to assess the integrity of mesenchymal cell characteristics and the mutant capability of chromosome number on hASCs undergoing in vitro expansion. Methods: In this study, three hASC samples from three Vietnamese people were collected and proliferated in MSCCult medium (Regemedlab, Ho Chi Minh City, Viet Nam) to the 5th cell passage. Next, hASCs were evaluated for change of mesenchymal stem cells (MSCs) characteristics including shape, immunophenotype (CD14, CD34, CD44, CD73, CD90, and/or CD166), and trilineage differentiation ability. Finally, the number of chromosomes after passages 1, 3, and 5 was evaluated by karyotyping technique. Results: The results showed that after five passages of culture, hASCs preserved the characteristic shape of MSCs, high expression of mesenchymal markers (e.g. CD44, CD73, CD90, and CD166). However, the cells also maintained their differentiation capacity to develop into various tissues such as bone, cartilage, and fat. The hASCs showed no mutation in the number of chromosomes. However, markers of hematopoietic cells (such as CD14 and CD34) exhibited heterogeneous changes between the samples during proliferation. Conclusion: In conclusion, at passage 5, hASCs retained the integrity of MSC features and there was no mutation discovered in the number of chromosomes. However, further evaluation is needed to conclude that the use of cultured cells in treatment is effective and safe.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116098933","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