Nuclear Science and Technology最新文献_第3页

Phase Transition of Aligned two Higgs Doublets Model in the Cornwall-Jackiw-Tomboulis Formalism 康沃尔-杰克维-通布里斯形式主义中对齐的双希格斯模型的相变

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v13i1.406

Tuan Anh Nguyen, Thanh Tam Dinh, Thi Minh Hue Dang

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Application of internal mono standard neutron activation analysis method in elemental analysis of car glasses for forensic study 内部单标准中子活化分析法在法医研究汽车玻璃元素分析中的应用

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v12i4.384

Tuan Anh Tran, Q. Tran, M. Ho, V. Ho, Van Cuong Trinh, Thi Tho Nguyen

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Development of Brain MRI Image Segmentation program using UNET++ network for radiosurgery planning 利用 UNET++ 网络开发脑磁共振成像图像分割程序，用于放射外科手术规划

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v13i1.398

Bui Ha, Tuấn Kiên Nguyễn, Dương Trần, Ngọc Toàn Trần, Quang Tuấn Hồ, Thu Trang Vũ

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Irradiation-induced Maillard reaction with glucosamine: an advance strategy to modify chitosan 辐照诱导的葡萄糖胺马氏反应：改性壳聚糖的先进策略

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v12i4.385

Anh Quoc Le, Van Phu Dang, Ngoc Duy Nguyen, Chi Thuan Nguyen, Q. Nguyen, Dai Nghiep Ngo

{"title":"Irradiation-induced Maillard reaction with glucosamine: an advance strategy to modify chitosan","authors":"Anh Quoc Le, Van Phu Dang, Ngoc Duy Nguyen, Chi Thuan Nguyen, Q. Nguyen, Dai Nghiep Ngo","doi":"10.53747/nst.v12i4.385","DOIUrl":"https://doi.org/10.53747/nst.v12i4.385","url":null,"abstract":"In this study, Maillard reaction with glucosamine (GA) induced by gamma irradiation was applied for chitosan (CT) and oligochitosan (OC) to improve the solution stability and antibacterial activity under alkaline condition. The mixture solutions of CT and/or OC with GA were irradiated at the dose of 25 kGy to form the Maillard reaction products (MRPs) respectively. The formations of MRPs were determined by spectrophotometric analyses at the wavelength of 284 nm and 420 nm. The improvement effect caused by the Maillard reaction on the stability of CT and OC solutions in alkaline condition was evaluated through the increase of pH value at the precipitation point of the solutions before and after irradiation. The antibacterial activity of the solutions against Escherichia coli was also investigated. The results showed that the CT-GA MRPs and OC-GA MRPs solutions could be remain their stability at pH 7, and the pH values at the precipitation point were 7.4 and 11.5 respectively. Moreover, at pH 7, the MRPs solutions exhibited high antibacterial activity with the reduction of ~ 4 log CFU/ml over control sample. Furthermore, 5-hydroxymethylfurfural (5-HMF), a known cytotoxic product formed by heat-induced Maillard reaction was not detected in both irradiated CT-GA and OC-GA solution. These results prove that the irradiation-induced Maillard reaction is an effective strategy to modify chitosan, and the MPRs of CT/OS with GA had a great potential to replace synthesis additives as a natural preservative for food applications","PeriodicalId":19445,"journal":{"name":"Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139958327","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 the reference X-ray narrow-spectrum series at SSDL of Institute for Nuclear Science and Technology 核科学与技术研究所 SSDL 参考 X 射线窄谱系列的特征

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v12i4.387

Thi My Linh Dang, Ngoc Quynh Nguyen, Duc-Ky Bui, Thi Nhung Duong, Quang Tuan Ho, Van Trieu Duong, Thanh Ha Tran, Thi Anh Duong Bui, Bao Ngoc Pham

引用次数: 0

Study of image reconstruction method for 2D gamma scan technique by anti-aliasing line "Xiaolin Wu" algorithm combined with simultaneous algebraic reconstruction algorithms and testing on MCNP simulation data 抗锯齿线 "Xiaolin Wu "算法与同步代数重建算法相结合的二维伽马扫描技术图像重建方法研究及 MCNP 仿真数据测试

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v12i4.397

Chau Nguyen Thanh, Thao Huong Giang Le, Ngoc Nhat Anh Nguyen, Van Chuan Nguyen, Tien Thanh Pham

{"title":"Study of image reconstruction method for 2D gamma scan technique by anti-aliasing line \"Xiaolin Wu\" algorithm combined with simultaneous algebraic reconstruction algorithms and testing on MCNP simulation data","authors":"Chau Nguyen Thanh, Thao Huong Giang Le, Ngoc Nhat Anh Nguyen, Van Chuan Nguyen, Tien Thanh Pham","doi":"10.53747/nst.v12i4.397","DOIUrl":"https://doi.org/10.53747/nst.v12i4.397","url":null,"abstract":"Gamma scanning technique is known to be an effective method for survey the condition of distillation columns in petrochemical refineries and has been widely applied. The result of the gamma scanning is a 1-dimensional graph showing the transmittance counts according to the height of the column. To illuminate the important phenomena occurring on the tray such as foaming; flooding; weeping due to valve failure on the tray needs experienced people and the interpretation results are still quite qualitative. The method of 2-D gamma scanning and reconstruction (2D Tomography), which has just appeared in the world in recent years, is considered as a potential method to help detect the above phenomena. This report presents the two-dimensional gamma scanning configuration, mathematical calculation and noise processing methods by using the combination of Xiaolin Wu’s line drawing algorithm with simultaneous algebraic reconstruction algorithm (SART) based on data from Monte Carlo simulation.","PeriodicalId":19445,"journal":{"name":"Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140448045","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

Study on preparation of Fe₃O₄@lapatinib nanoparticles for application as a targeted drug delivery system in the treatment of breast cancer 关于制备Fe₃O₄@lapatinib纳米颗粒作为靶向给药系统应用于乳腺癌治疗的研究

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v13i1.410

Thanh Minh Pham, Phuoc Minh Thanh Mai, Thi Mai Huong Le, Van Phuc Phan

引用次数: 0

Effective dose evaluation for external exposure from surface soil by using resrad-onsite code 利用 resrad-onsite 代码评估表层土壤外照射的有效剂量

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v13i1.403

Thi Thanh Nga Nguyen, Nhu Sieu Le, Bich Thuy Nguyen

{"title":"Effective dose evaluation for external exposure from surface soil by using resrad-onsite code","authors":"Thi Thanh Nga Nguyen, Nhu Sieu Le, Bich Thuy Nguyen","doi":"10.53747/nst.v13i1.403","DOIUrl":"https://doi.org/10.53747/nst.v13i1.403","url":null,"abstract":"An annual effective dose evaluation from Dong Nai surface soil (45 samples) to humans was carried out in this work. ResRad-Onsite software has been applied to estimate the maximum exposure dose by considering different exposure levels across an area of 5905.7 km2 with a topsoil thickness of 20 cm. The calculation grid used in ResRad Onsite software is divided in the form of a circle of radius 3, 5, 10, 20, and 30 km, respectively, calculated from the circle center in terms of 16 wind directions. A high-purity germanium detector (HPGe) was used to determine 238U, 232Th, 226Ra, 137Cs, and 40K isotopes. The range activity concentrations of them were found to be 6.46 ÷ 48.11; 13.95 ÷ 58.75; 5.71 ÷ 35.27; 0.15 ÷ 1.23 and 6.7 ÷ 222; mBq/g, respectively. The isotope 239,240Pu was determined by the radiochemical separation method, measured on the alpha spectrometer system, and the calculated value range is 0.009 ÷ 0.073 mBq/g. The activity of 90Sr was determined by separation technique, measured on a low-background alpha/beta total counting system (MPC 9300) with a calculated value range of 0.10 ÷ 0.83 mBq/g. By ResRad-Onsite code, the external effective dose derived from the ground (excluding Radon’s contribution) is calculated to be 170 ÷ 658 µSv/year with an average value is 368.6 µSv/year. The external dose from the soil is 136.5 µSv/year (accounting for 37%). The results showed that the annual radiation dose distribution derived from the ground equivalent to the average of some different regions in the territory of Vietnam and the world. In addition, the external effective dose from the ResRad-Onsite code tended to be about 1.36 times smaller than the practical measured due to the library’s different dose conversion coefficients.","PeriodicalId":19445,"journal":{"name":"Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140448395","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 and manufacture of the mini gamma camera using multi-anode photo multiplier tube (Ma-PMT) 利用多阳极光电倍增管（Ma-PMT）研究和制造微型伽马相机

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v12i4.375

Bui Ha, Duy Dang Nguyen The, Hoang Nguyen Tuan, Trang Vu Thu, Hai Lai Viet

引用次数: 0

Self-characterization of irradiation facility using synthetic multi-element standard for determination of k0-factors of seven radionuclides of interest 利用合成多元素标准测定七种相关放射性核素的 k0 因子，实现辐照设施的自我特征描述

Nuclear Science and Technology Pub Date : 2024-02-20 DOI: 10.53747/nst.v13i1.402

Phonesavanh Lathdavong, Ho Manh Dung, Hồ Văn Doanh, T. Q. Thiện, Trương Trường Sơn

{"title":"Self-characterization of irradiation facility using synthetic multi-element standard for determination of k0-factors of seven radionuclides of interest","authors":"Phonesavanh Lathdavong, Ho Manh Dung, Hồ Văn Doanh, T. Q. Thiện, Trương Trường Sơn","doi":"10.53747/nst.v13i1.402","DOIUrl":"https://doi.org/10.53747/nst.v13i1.402","url":null,"abstract":"In this study, the k0 factors of 7 short and medium-lived radionuclides (i.e. 66Cu, 52V, 38Cl, 134mCs, 128I, 140La and 56Mn) were experimentally determined at the Dalat nuclear research reactor (DNRR). The synthetic multi-element standard (SMELS) samples were irradiated at Channel 7-1 installed at the DNRR. SMELS Type III contains Au and Zr, thus also allowing the self-characterization of the irradiation facility (i.e. the direct determination of f and a with only this material). The k0 factors of 7 short and medium-lived radionuclides obtained in this work are a good agreement with the reference k0 factors. The ratio values between the experimental and reference k0 values were 66Cu of 1.004, 52V of 1.004, 38Cl of 0.961 and 0.976 (1642.7 keV and 2167.4keV, respectively), 134mCs of 0.831, 128I of 1.022, 140La of 0.936, 0.955 and 0.955 (328.8 keV, 487.0 keV and 1596.2keV, respectively), 56Mn of 0.985 and 0.973 (846.8 keV and 1810.7keV, respectively). The radionuclides range of uncertainty values were lower than 7%. The present result indicates that the k0 factors can be determined by using synthetic multi-element standards (SMELS).","PeriodicalId":19445,"journal":{"name":"Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140447779","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