Iranian Journal of Radiation Research最新文献_第8页

Radiation cancer risk from doses to newborn infants hospitalized in neonatal intensive care units in children hospitals of Isfahan province 伊斯法罕省儿童医院新生儿重症监护室住院新生儿的辐射癌症风险

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.117

A. Aliasgharzadeh, D. Shahbazi-Gahrouei, F. Aminolroayaei

{"title":"Radiation cancer risk from doses to newborn infants hospitalized in neonatal intensive care units in children hospitals of Isfahan province","authors":"A. Aliasgharzadeh, D. Shahbazi-Gahrouei, F. Aminolroayaei","doi":"10.18869/ACADPUB.IJRR.16.1.117","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.117","url":null,"abstract":"Background: This study aimed to invesgate dose area product (DAP), effecve dose, and radiaon risk in newborn infants hospitalized in neonatal intensive care units in Isfahan and Kashan. Materials and Methods: During a period of six months, DAP for chest X-ray examinaons for newborn infants hospitalized in NICUs of five special hospitals including Behesh (in Kashan), Al-Zahra, Imam Hossein, Amin and Goldis (in Isfahan) were measured using DAP meter. Then, using the dose area product (DAP) and conversion coefficients, the effecve dose was calculated. Radiaon risk per single exposure was esmated by applying 2.8 A� 10-2 and 13 A� 10-2 factors per Sievert. Also, to esmate the radiaon risk in the exposed populaon, the collecve effecve dose and the menoned factors were used. Results: The mean DAP, the effecve dose, the radiaon risk per single exposure, and the radiaon risk in the exposed populaon were found to be 15.37 Â± (1.19), 45.52 Â± (3.28), 1.27-5.91 A� 10-6, and 0.0045-0.021, respecvely. Conclusion: Findings indicate that the effecve dose and therefore radiaon risk in NICUs for newborn infants is higher than that of other studied cies in Iran. Consequently, it is necessary to aCempt to reduce radiaon dose while maintaining the image quality. In addion, theorecal and praccal training programs are needed to increase the knowledge and skills of radiologic technologists on the concept of As Low As Reasonably Achievable (ALARA) and possible radiaon cancer risks.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"117-122"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47232045","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: 7

Cytogenetic and biochemical competency of chamomile essential oil against γ-rays induced mutagenic effects in mice 洋甘菊精油对γ射线致小鼠突变作用的细胞遗传学和生物化学能力

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.55

S. Tawfik, M. Ahmed, Z. Said, M. R. Mohamed

{"title":"Cytogenetic and biochemical competency of chamomile essential oil against γ-rays induced mutagenic effects in mice","authors":"S. Tawfik, M. Ahmed, Z. Said, M. R. Mohamed","doi":"10.18869/ACADPUB.IJRR.16.1.55","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.55","url":null,"abstract":"Background: Chamomile essen al oil (CEO) hauls out from Matricaria chamomilla L., is a well-known an -oxidant. Oxida ve stress induces clastogenic and biochemical disorders a er γ-irradia on of animals. Materials and Methods: Mice were divided into five groups. Control group received vehicle only. CEO-treated group received CEO. Irradiated group received vehicle and exposed to γ-rays. Pre-treated group received CEO 1⁄2h before γ-rays exposure. Post-treated group received CEO 1⁄2 hour a er γ-rays exposure. Peripheral-blood micronucleus (PMN), bone-marrow micronucleus (BMN), frequency of chromosomal aberra ons (CAs), reduced glutathione (GSH), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (PGx) and myeloperoxidase (MPO), lactate dehydrogenase (LDH) and tumor necrosis factor-α (TNF-α) parameters were assessed. Results: In irradiated mice group, PMN score, BMN occurrence and CAs were increased when compared with control mice group. In addi on, significant increases in levels of liver lipid peroxida on (LP); expressed as MDA and TNF-α. In addi on, ac vi es of liver MPO and LDH were found. Besides, significant decreases in content of GSH, ac vi es of SOD and PGx in liver ssues were recognized. CEO treatment (1.0 g/kg body weight) beforeand a er-irradia on ameliorated all these biochemical indices, as well as cytogene c altera ons induced by γ-rays when compared with irradiated group, indica ng that preor post-treatment with CEO significantly a:enuates the acute hazards caused by γ-rays exposure. Conclusion: The data suggest that CEO possesses a radioprotec ve poten al against γ-radia on induced cytogene c and biochemical damages in mice.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"55-64"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48654053","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

Pre-treatment with rapamycin protects hematopoiesis against radiation injury 雷帕霉素预处理保护造血免受辐射损伤

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.65

Zhijian Wang, Yixuan Fang, M. Nie, N. Yuan, Jianrong Wang, Shuai Zhang

{"title":"Pre-treatment with rapamycin protects hematopoiesis against radiation injury","authors":"Zhijian Wang, Yixuan Fang, M. Nie, N. Yuan, Jianrong Wang, Shuai Zhang","doi":"10.18869/ACADPUB.IJRR.16.1.65","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.65","url":null,"abstract":"Background: Protec on of hematopoie c system has become a primary goal in the development of novel medical countermeasures against ioniza on radia on and radiotherapy. This study was to explore the role of rapamycin in normal ssues against radia on. Materials and Methods: Mice were pretreated with rapamycin by i.p. every other day for five mes before 5 Gy or 8.5 Gy γ-ray whole body irradia on. Blood cell counts, HE staining of bone marrow and liver, bone marrow transplanta on, CFU of spleen were used to measure the damage of hematopoiesis and extramedullary hemopoie c organs. Regular karyotype analysis and expression of γ-H2AX (by flow cytometry and western blot) were used to measure DNA damage. Rad 50 and DNA Lig 4 expression by western blot were to see the DNA repair ability. Results: The decrease of red blood cells and platelet induced by radia on were alleviated by pretreatment with rapamycin (d 7,15, p<0.01), and the long-term restora on of white blood cells, lymphocytes and bone marrow were enhanced in rapamycin pretreatment group (d 30,40,70, p<0.05). The transplanta on experiment also indicates that the long-term recons tu on in lethally irradiated recipient mice was improved in rapamycin group (p<0.05). The hepatocellular injury by radia on was also reduced and the colony forma on numbers of spleen a=er irradia on was improved in rapamycin group (p<0.05). Karyotype analysis indicates that rapamycin protected bone marrow cells from chromosome muta on. Furthermore, expression of DNA repair proteins Rad 50 and DNA Lig 4 was enhanced and DNA damage marker γ-H2AX was reduced in mice exposed to radia on by rapamycin pretreatment. Conclusion: Rapamycin pretreatment mi gates hematopoie c system from radia on injury in both bone marrow and extramedullary hematopoie c organs by improving genomic stability and increasing survival of hematopoie c stem and progenitor cells (HSPCs).","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"65-74"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43607516","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

Radiation exposure during percutaneous nephrolithotomy; Is there a risk of the patient and the operating team? 经皮肾取石术期间的辐射暴露；患者和手术团队是否存在风险？

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.133

E. Șahin, C. Kara, B. Reșorlu, M. G. Sönmez, A. Unsal

{"title":"Radiation exposure during percutaneous nephrolithotomy; Is there a risk of the patient and the operating team?","authors":"E. Șahin, C. Kara, B. Reșorlu, M. G. Sönmez, A. Unsal","doi":"10.18869/ACADPUB.IJRR.16.1.133","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.133","url":null,"abstract":"Background: The aim of this study was to calculate the radia on amount exposed during percutaneous nephrolithototomy (PCNL) and to make the urologists and other staff sensi ve about the radia on risk they were exposed to. Materials and Methods: We measured the radia on exposure during 114 cases of PCNL performed. Thermoluminescent dosimeters (TLD) were placed between the opera on table and the pa ent at the loca on of kidney and gonads of pa ents to measure the radia on exposure of pa ents. TLD were placed at the head, neck, finger and the legs of the opera ng surgeon to measure the occupa onal exposure of the urologist. And also two dosimeters were placed to the inner wall of the opera ng room and two dosimeters were placed to the hall. Results: The mean fluoroscopy screening me was 2.18 minutes (0.15 6.12) and the mean opera on me was 49 minutes (10-150). The mean radia on exposure for pa ents was 1.307 milisievert (mSv) at kidney loca on and 0.562 mSv at gonad loca on per procedure. Surgeon exposure was 0.021 and 0.003 mSv per procedure for hand and leg, respec vely. Radia on amounts exposed inside the room and by the surgeon were sta s cally significantly lower than measured radia on results compared to pa ent kidney. Conclusion: According to our findings radia on exposure of the pa ent and the surgeon is below the annual occupa onal dose limit recommenda ons. However, for protec ng from stochas c effects of radia on, fluoroscopy should be used as low as possible and lead aprons and thyroid shields must be worn to minimize the","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"133-138"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47125432","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

Radiation safety behavior model for dental hygiene departments of universities in South Korea 韩国大学口腔卫生系辐射安全行为模型

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.95

P. Cho, Y. Kim, H. Jang, E. Han

{"title":"Radiation safety behavior model for dental hygiene departments of universities in South Korea","authors":"P. Cho, Y. Kim, H. Jang, E. Han","doi":"10.18869/ACADPUB.IJRR.16.1.95","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.95","url":null,"abstract":"Background: Dental hygiene departments in Korean ins tu ons of higher educa on regularly use radiography systems for educa ng students. Despite reports indica ng that exposure doses from these radia on-genera ng devices are small, and thus, present low risks for causing physical harm or chromosomal abnormali es, the large numbers of people who par cipate in oral examina ons involving dental radiography raise ques ons about the op mal methods for managing radia on safety. Materials and Methods: Social cogni ve theory incorpora ng major variables pertaining to radia on safety management derived from the Haddon Matrix was used. This model proposes and refines an approach for enhancing the radia on safety behaviors of both professors and students in Korea’s collegiate dental hygiene departments. Results: The results of the study indicate that professors respond most favorably to stated expecta ons for accomplishing effec ve radia on safety management; thus model proposes that enhancing safety behaviors among professors depends upon cul va ng organiza onal environments with clear expecta ons. Students, in contrast, engage in desirable radia on safety management behaviors when they can display selfefficacy; thus, the model proposes that personal educa on that enhances their prac cal knowledge for engaging in desired behaviors is most desirable. Conclusion: To enhance the current radia on safety management behaviors of the collegiate dental hygiene departments in Korea, it will be helpful to establish a strategy arising from the model developed here.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"95-106"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42536930","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

Determination of hemolysis, osmotic fragility and fluorescence anisotropy on irradiated red blood cells as a function of kV of medical diagnostic X-rays 作为医用诊断X射线kV函数的辐照红细胞溶血、渗透脆性和荧光各向异性的测定

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.123

M. Tungjai, N. Phathakanon, P. Ketnuam, J. Tinlapat, S. Kothan

{"title":"Determination of hemolysis, osmotic fragility and fluorescence anisotropy on irradiated red blood cells as a function of kV of medical diagnostic X-rays","authors":"M. Tungjai, N. Phathakanon, P. Ketnuam, J. Tinlapat, S. Kothan","doi":"10.18869/ACADPUB.IJRR.16.1.123","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.123","url":null,"abstract":"Background: People occasionally undergo medical diagnos c X-ray examina ons and expose their red blood cells to radia on. Radia on that is generated from medical diagnos c X-ray machines is widely used in medical diagnoses. One of the important parameters is kilo-voltage (kV) that is applied across the X-ray tube in medical diagnos c X-ray machines. Kilo-voltage influences the radia on dosage. The aim of this study is to determine the hemolysis, osmo c fragility, and fluorescence anisotropy value on irradiated red blood cells as a func on of kV during medical diagnos c X-ray examina ons. Materials and Methods: The kV, kilo-voltage that is applied across an X-ray tube, of a medical diagnos c X-ray machine was operated at 50, 70 and 100 kV. We determined the hemolysis, osmo c fragility, and fluorescence anisotropy value in red blood cells at 0.5 and 4 hours post-irradia on. In order to determine hemolysis and osmo c fragility, the release of hemoglobin was measured by spectrophotometry technique. 1,6diphenyl-1,3,5-hexatriene (DPH) was used as a molecular probe for determining fluorescence anisotropy value by fluorescence anisotropy technique. Non-irradiated red blood cells served as the control. Results: For the 50, 70, and 100 kV of medical diagnos c X-rays, the hemolysis, osmo c fragility, and fluorescence anisotropy values of irradiated red blood cells at 0.5 and 4 hours post-irradia on did not significantly change when compared to the control. Conclusion: Our results suggested that 50, 70, and 100 kV of medical diagnos c X -ray did not influence hemolysis, osmo c fragility, and fluorescence anisotropy values of irradiated red blood cells.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"123-127"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48143388","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: 10

Quantitative evaluation of abscopal effect based on biological effective dose in breast cancer tumors in mice 基于生物有效剂量的小鼠乳腺癌症肿瘤脓肿效应的定量评价

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.45

H. Zarei, H. Mozdarani, A. Mahmoudzadeh, M. Salimi, H. Eyni, Mohsen Bakhshandeh

{"title":"Quantitative evaluation of abscopal effect based on biological effective dose in breast cancer tumors in mice","authors":"H. Zarei, H. Mozdarani, A. Mahmoudzadeh, M. Salimi, H. Eyni, Mohsen Bakhshandeh","doi":"10.18869/ACADPUB.IJRR.16.1.45","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.45","url":null,"abstract":"Background: Due to abscopal effect, cell damage may occur outside of the radia on field and the quan fica on of this effect is one of the most challenging debates in radia on therapy. The aim of this study was to es mate the abscopal effect induced in non-irradiated tumors quan ta vely by means of biological effec ve dose (BED). Materials and Methods: Breast tumors using 4T1 and MC4-L2 cells, were induced into the flank region of Balb/c mice. When palpable, the tumor on one side of the body was irradiated with dose of 28Gy in 14 frac ons and 2 Gy per frac on, 5 frac ons per week. The tumor on the other side of the body was shielded with a lead plate. BED was es mated based on tumor volume. H&E staining and TUNEL assay were performed to assess histological changes and apoptosis in irradiated and non-irradiated tumors. Results: The effect of radia on on non-irradiated tumors was more than that on irradiated ones. The BED was 4.49 and 6.74 in 4T1 and MC4-L2 tumors, respec vely. The ra o of the tumor volume in the last frac on to that in the first frac on for irradiated 4T1 tumors was 2.32 and in non-irradiated was 1.50. This ra o in irradiated and nonirradiated MC4-L2 tumors was 2.64 and 1.98, respec vely. The number of apopto c cells was higher in non-irradiated ssues. Conclusion: Results indicate that the occurrence of abscopal effect is highly depends on the type of tumor. By means of the abscopal effect, more radia on dose can be delivered to the tumor and metasta c sites.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"45-54"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41445785","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

Comparative study of chemo-sensitivity expressed as micronuclei in lymphocytes of breast cancer patients, their unaffected first degree relatives and normal controls as a possible prognostic marker 乳腺癌患者及其未受影响的一级亲属和正常人淋巴细胞微核表达的化疗敏感性作为可能的预后指标的比较研究

Iranian Journal of Radiation Research Pub Date : 2018-01-10 DOI: 10.18869/ACADPUB.IJRR.16.1.85

M. Salimi

{"title":"Comparative study of chemo-sensitivity expressed as micronuclei in lymphocytes of breast cancer patients, their unaffected first degree relatives and normal controls as a possible prognostic marker","authors":"M. Salimi","doi":"10.18869/ACADPUB.IJRR.16.1.85","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.16.1.85","url":null,"abstract":"Background: Genomic instability is one of primary causes for malignant cell transforma on. In this study induced genomic instability expressed as micronuclei in breast cancer (BC) pa ents with different stages of the disease compared with their unaffected first degree rela ves (FDR) and normal unrelated controls was inves gated. Materials and Methods: The background and net micronucleus frequency as well as other cellular damages induced a(er in vitro treatment with 25 μg/ml of bleomycin were evaluated using cytokinesis block micronucleus-cytome assay in peripheral blood lymphocytes of 120 Iranian individuals comprised of 40 BC pa ents, 40 FDRs and 40 normal control groups. Considering the protocol for each person total of 1,000 binucleated cells with well-preserved cytoplasm were blind scored on coded slides. Results: The net frequency of micronuclei was drama cally higher in breast cancer pa ents compared with controls. Also the net micronucleus (MN) frequency was significantly higher in FDRs compared with normal unrelated control. Considering cancer stages and clinical parameters, our results showed that the higher net frequency of MN was observed in higher stages and distant metastasis. Conclusion: This higher MN frequency both background and bleomycin induced in FDR compared with control group, clearly demonstrates that MN frequencies are determined by gene c factors to a major part and MN frequencies represent an intermediate phenotype between molecular DNA repair mechanisms and the cancer phenotype and affirms the approaches that are made to u lize them as predictors’ cancer risk . Also the associa on between MN frequency and metastasis proposes it as a possible","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"16 1","pages":"85-93"},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47118919","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

Assessment of natural radioactivity levels for Karadağ Mountain, Turkey 土耳其卡拉达奥山天然放射性水平评估

Iranian Journal of Radiation Research Pub Date : 2017-10-10 DOI: 10.18869/ACADPUB.IJRR.15.4.399

M. Korkmaz, O. Agar, E. Uzun

{"title":"Assessment of natural radioactivity levels for Karadağ Mountain, Turkey","authors":"M. Korkmaz, O. Agar, E. Uzun","doi":"10.18869/ACADPUB.IJRR.15.4.399","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.15.4.399","url":null,"abstract":"Background:The natural radioac vity levels in soil samples of Karadağ Mountain in central Anatolia region have been determined. Materials and Methods: Analyses on the collected samples were performed to determine gross alpha and beta radioac vity concentra ons by using a gas-flow propor onal counter and the concentra ons of U, Th and K by using a NaI(Tl) scin lla on detector. Results: The es mated ac vi es of gross alpha and beta ranged between 305.155±46.830 and 1305.437±77.23 Bq.kg-1, 479.743±22.658 and 1177.373±30.908 Bq.kg-1, respec vely. The mean ac vity values of U, Th and K radionuclides were found to be 71.6, 83.9 and 451.1 Bq.kg-1, respec vely. Also, known radia on health hazard indices were calculated using radioac vity concentra ons of soil samples. Conclusion: The present results have been compared with the obtained values from other regions in Turkey and the interna onally reported values as well as the reference values. The soil samples in the studied area are safe and can be used as a construc on material without posing any significant radiological threat to public. This inves ga on reveals a baseline of levels of natural radioac vity in Karadağ Mountain, Turkey.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"15 1","pages":"399-406"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42810793","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: 11

Fabrication of an alpha particle counter: spin coated films of synthesized nanocrystalline cadmium tungstate powder α粒子计数器的制备：合成的纳米晶钨酸镉粉末的旋涂薄膜

Iranian Journal of Radiation Research Pub Date : 2017-10-10 DOI: 10.18869/ACADPUB.IJRR.15.4.425

Hossein Ziluei, M. Larijani, R. Azimirad, F. Ziaei

{"title":"Fabrication of an alpha particle counter: spin coated films of synthesized nanocrystalline cadmium tungstate powder","authors":"Hossein Ziluei, M. Larijani, R. Azimirad, F. Ziaei","doi":"10.18869/ACADPUB.IJRR.15.4.425","DOIUrl":"https://doi.org/10.18869/ACADPUB.IJRR.15.4.425","url":null,"abstract":"Background: CdWO4 is a scin llator with some unique proper es. For example, high density, thermal and chemical stability and so on. Different applica ons of this scin llator such as X-ray scin llator has been inves gated thoroughly so far. However, there is limited number of studies repor ng the characteris cs of CdWO4 as an alpha counter. Materials and Methods: The CdWO4 powder was synthesized by a simple co-precipita on method. Then, the CdWO4 films with different thicknesses were prepared by spin coa ng method on glass substrates. The CdWO4 powder and films were characterized by X-ray diffrac on, photoluminescence, scanning electron microscopy, Fourier transformed-infrared spectroscopy, and ion beam induced luminescence. Finally, the response of samples with different thicknesses was measured using a 241 Am alpha source with 1860 Bq ac vity. Results: The analyses revealed that the nanocrystalline CdWO4 with about 30 nm size was successfully synthesized without any impurity. Besides, the CdWO4 films had the same luminescence emission peak characteris cs as CdWO4 powder had. Conclusion: It was observed that the sample with 2.9 mg/cm 2 thickness had the best coun ng efficiency (over 2π geometry) among the others.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":"15 1","pages":"425-430"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46588908","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