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https://www.readbyqxmd.com/read/28432930/an-innovative-procedure-for-norm-scales-treatment-and-radionuclides-separation
#1
Jamal Al Abdullah, Mohammad Said Al-Masri, Yusr Amin, Hussam Khalily, Mohammad Ammar, Samer Nassour
The present study focuses on the development of a new chemical treatment method for naturally occurring radioactive materials (NORM) scale wastes from the oil industry. The method consists of three-stages, including the separation of oil using the Fenton oxidation process at room temperature, the complete dissolution of soluble and slightly soluble salts and separation of Ra and Pb isotopes. The proposed method can be considered as an innovative procedure for NORM scales treatment and radionuclides separation, which in turn support the radioactive waste management with economic benefits...
April 5, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28431519/semi-automatic-synthesis-and-biodistribution-of-n-2-18-f-fluoropropionyl-bis-zinc-ii-dipicolylamine-18-f-fp-dpazn2-for-ad-model-imaging
#2
Fuhua Wen, Dahong Nie, Kongzhen Hu, Ganghua Tang, Shaobo Yao, Caihua Tang
BACKGROUND: Phosphatidylserine (PS)-targeting positron emission tomography (PET) imaging with labeled small-molecule tracer is a crucial non-invasive molecule imaging method of apoptosis. In this study, semi-automatic radiosynthesis and biodistribution of N-(2-(18)F-fluoropropionyl)-bis(zinc(II)-dipicolylamine) ((18)F-FP-DPAZn2), as a potential small-molecule tracer for PET imaging of cell death in Alzheimer's disease (AD) model, were performed. METHODS: (18)F-FP-DPAZn2 was synthesized on the modified PET-MF-2V-IT-I synthesizer...
April 21, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28431380/recent-aspects-of-uranium-toxicology-in-medical-geology
#3
REVIEW
Geir Bjørklund, Olav Albert Christophersen, Salvatore Chirumbolo, Olle Selinus, Jan Aaseth
Uranium (U) is a chemo-toxic, radiotoxic and even a carcinogenic element. Due to its radioactivity, the effects of U on humans health have been extensively investigated. Prolonged U exposure may cause kidney disease and cancer. The geological distribution of U radionuclides is still a great concern for human health. Uranium in groundwater, frequently used as drinking water, and general environmental pollution with U raise concerns about the potential public health problem in several areas of Asia. The particular paleo-geological hallmark of India and other Southern Asiatic regions enhances the risk of U pollution in rural and urban communities...
April 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28431375/radioactivity-in-wastes-generated-from-shale-gas-exploration-and-production-north-eastern-poland
#4
Paweł Jodłowski, Jan Macuda, Jakub Nowak, Chau Nguyen Dinh
In the present study, the K-40, U-238, Ra-226, Pb-210, Ra-228 and Th-228 activity concentrations were measured in 64 samples of wastes generated from shale gas exploration in North-Eastern Poland. The measured samples consist of drill cuttings, solid phase of waste drilling muds, fracking fluids, return fracking fluids and waste proppants. The measured activity concentrations in solid samples vary in a wide range from 116 to around 1100 Bq/kg for K-40, from 14 to 393 Bq/kg for U-238, from 15 to 415 Bq/kg for Ra-226, from 12 to 391 Bq/kg for Pb-210, from a few Bq/kg to 516 Bq/kg for Ra-228 and from a few Bq/kg to 515 Bq/kg for Th-228...
April 18, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28429014/formation-of-mono-and-binuclear-neodymium-iii-gluconate-complexes-in-aqueous-solutions-in-the-ph-range-of-2-8
#5
Bence Kutus, Norbert Varga, Gábor Peintler, Alexandru Lupan, Amr A A Attia, István Pálinkó, Pál Sipos
The complex formation between Nd(iii) and d-gluconate (Gluc(-)) is of relevance in modelling the chemical equilibria of radioactive waste repositories. In the present work, the formation of NdpGlucqH-r complexes at 25 °C and pH = 2-8 was studied via spectrophotometry, potentiometry, freezing point depression, conductometry and NMR spectroscopy. In addition to the four mononuclear complexes (pq-r = 110, 120, 130 and 11-2), the formation of two binuclear, so far unknown complexes (pq-r = 23-2 and 24-2) was revealed...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28428694/a-microarray-immunoassay-for-serum-thyrotropin-and-thyroglobulin-using-antibodies-immobilized-on-track-etched-membranes
#6
Bharti Jain, J Kumarasamy, Chandrakala Gholve, Savita Kulkarni, M G R Rajan
Serum thyroglobulin (Tg) and thyroid stimulating hormone (TSH) measurements have evolved as important analytes for monitoring the prognosis of patients with differentiated thyroid cancer, post-thyroidectomy. Individual analyte immunoassay is the current practice in clinical pathology, but the simultaneous assay for all relevant analytes for a given disease, can reduce assay costs, improve patient compliance and give the clinician more information for an unequivocal diagnosis. Microarray immunoassay (MI) can achieve this goal and, hence, we have developed and validated a immuno-radiometric MI for quantitation of serum TSH and Tg by using highly micro-porous polycarbonate (PC) track-etched membranes (TEM) to immobilize the monoclonal anti-TSH and polyclonal anti-Tg antibodies in ~1 mm diameter spots...
June 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28428267/association-of-nf%C3%AE%C2%BAb-polymorphisms-with-clinical-outcome-of-non-medullary-thyroid-carcinoma
#7
Theo S Plantinga, Mirela Petrulea, Marije Oosting, Leo Joosten, Doina Piciu, Jan Wa Smit, Romana T Netea-Maier, Carmen Georgescu
The NF-κB inflammatory pathway plays a major role in cancer development and clinical progression. Activation of NF-κB signaling is promoted by NFKB1 and inhibited by NFKBIA. The present study aimed to determine the relevance of NFKB1 rs4648068 and NFKBIA rs2233406 genetic variants for non-medullary thyroid cancer (NMTC) susceptibility, progression and clinical outcome. This case-control and cohort study consists of a Romanian discovery cohort (157 patients, 258 controls) and a Dutch validation cohort (138 patients, 188 controls)...
April 20, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28427006/regeneration-of-pilot-scale-ion-exchange-columns-for-hexavalent-chromium-removal
#8
Julie A Korak, Richard Huggins, Miguel Arias-Paic
Due to stricter regulations, some drinking water utilities must implement additional treatment processes to meet potable water standards for hexavalent chromium (Cr(VI)), such as the California limit of 10 μg/L. Strong base anion exchange is effective for Cr(VI) removal, but efficient resin regeneration and waste minimization are important for operational, economic and environmental considerations. This study compared multiple regeneration methods on pilot-scale columns on the basis of regeneration efficiency, waste production and salt usage...
March 9, 2017: Water Research
https://www.readbyqxmd.com/read/28426198/unified-biosynthetic-origin-of-the-benzodipyrrole-subunits-in-cc-1065
#9
Sheng Wu, Xiao-Hong Jian, Hua Yuan, Wen-Bing Jin, Yue Yin, Ling-Yun Wang, Juan Zhao, Gong-Li Tang
CC-1065 is the first characterized member of a family of naturally occurring antibiotics including yatakemycin and duocarmycins with exceptionally potent anti-tumor activity. CC-1065 contains three benzodipyrroles (1a-, 1b- and 1c-) of which 1a-subunit is remarkable by being composed of a cyclopropane ring, and the mechanism for the biological formation of benzodipyrrole rings remains elusive. Previously, biosynthetic studies of CC-1065 were limited to radioactively labelled precursor feeding experiments, which showed that tyrosine (Tyr) and serine (Ser) were incorporated into the two benzodipyrrole (1b- and 1c-) subunits via the same mode but that this was different from the key cyclopropabenzodipyrrole (1a-) subunit with N1-C2-C3 derived from Ser...
April 20, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28426025/modular-low-light-microscope-for-imaging-cellular-bioluminescence-and-radioluminescence
#10
Tae Jin Kim, Silvan Türkcan, Guillem Pratx
Low-light microscopy methods are receiving increased attention as new applications have emerged. One such application is to allow longitudinal imaging of light-sensitive cells with no phototoxicity and no photobleaching of fluorescent biomarkers. Another application is for imaging signals that are inherently dim and undetectable using standard microscopy techniques, such as bioluminescence, chemiluminescence or radioluminescence. In this protocol, we provide instructions on how to build a modular low-light microscope (1-4 d) by coupling two microscope objective lenses, back to back from each other, using standard optomechanical components...
May 2017: Nature Protocols
https://www.readbyqxmd.com/read/28425430/dose-assessment-from-chronic-exposure-to-industrial-norm-in-iron-ore-processing
#11
Franck Dal-Molin, Raymond Fisher, David Frost, David R Anderson, David Read
Radiological exposures due to naturally occurring radioactive material (NORM) can occur during a wide range of work-related activities in the mineral processing and chemical industries. However, evaluation of such exposures in industrial settings remains a difficult exercise owing inter alia to the large number of personnel, operations and plants affected; assumptions that often have to be made concerning the actual duration and frequency of exposures; the complex chemistry and radioactive disequilibria involved and typically, the paucity of historical data...
April 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28423195/noninvasive-imaging-of-c-rgd-2-9r-as-a-potential-delivery-carrier-for-transfection-of-sirna-in-malignant-tumors
#12
Xue Qi Chen, Meng Liu, Rong Fu Wang, Ping Yan, Chun Li Zhang, Chao Ma, Qian Zhao, Lei Yin, Guang Yu Zhao, Feng Qin Guo
The purpose of our study was to develop and evaluate a novel integrin αv β3 -specific delivery carrier for transfection of siRNA in malignant tumors. We adopted arginine-glycine-aspartate (RGD) motif as a tissue target for specific recognition of integrin αν β3 . A chimaeric peptide was synthesized by adding nonamer arginine residues (9R) at the carboxy terminus of cyclic-RGD dimer, designated as c(RGD)2 -9R, to enable siRNA binding. To test the applicability of the delivery carrier in vivo, c(RGD)2 -9R was labeled with radionuclide of technetium-99 m...
April 18, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28420176/establishing-reliable-cu-64-production-process-from-target-plating-to-molecular-specific-tumor-micro-pet-imaging
#13
Qinghua Xie, Hua Zhu, Feng Wang, Xiangxi Meng, Qiushi Ren, Chuanqin Xia, Zhi Yang
Copper-64 is a useful radioisotope for positron emission tomography (PET). Due to the wide range of applications, the demand of (64)Cu with low metallic impurities is increasing. Here we report a simple method for the efficient production of high specific activity (64)Cu using a cyclotron for biomedical application. We designed new equipment based on the plating of enriched (64)Ni as the target, and used automated ion exchange chromatography to purify copper-64 efficiently after irradiation and dissolution of the target in good radiochemical and chemical yield and purity...
April 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28419919/synthesis-of-layered-titanate-nanowires-at-low-temperature-and-their-application-in-efficient-removal-of-u-vi
#14
Ling Yin, Pengyi Wang, Tao Wen, Shujun Yu, Xiangxue Wang, Tasawar Hayat, Ahmed Alsaedi, Xiangke Wang
Uranium(VI) has become one of the most potential contaminants due to its productive and irreversibility impact on the surrounding environment. Titanate nanowires (TNWs) have attracted significant attention because of its high ion exchange ability and facile synthesis. Herein the TNWs were synthesized, and the morphology and structure of TNWs were investigated by Fourier transformed infrared spectroscopy, scanning electron microscope, transmission electron microscope, X-ray diffraction and X-ray photoelectron spectroscopy in detail...
April 15, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28419332/new-model-for-mines-and-transportation-tunnels-external-dose-calculation-using-monte-carlo-simulation
#15
Kh A Allam
In this work, a new methodology is developed based on Monte Carlo simulation for tunnels and mines external dose calculation. Tunnels external dose evaluation model of a cylindrical shape of finite thickness with an entrance and with or without exit. A photon transportation model was applied for exposure dose calculations. A new software based on Monte Carlo solution was designed and programmed using Delphi programming language. The variation of external dose due to radioactive nuclei in a mine tunnel and the corresponding experimental data lies in the range 7...
April 13, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28418815/educational-activity-for-the-radiation-emergency-system-in-the-northern-part-of-japan-meeting-report-on-the-3rd-educational-symposium-on-radiation-and-health-esrah-by-young-scientists-in-2016
#16
Yusuke Matsuya, Takakiyo Tsujiguchi, Masaru Yamaguchi, Takaaki Kimura, Ryosuke Mori, Ryota Yamada, Ryo Saga, Yohei Fujishima, Hiroyuki Date
In the northern part of Japan, close cooperation is essential in preparing for any possible emergency response to radiation accidents because several facilities, such as the Low-Level Radioactive Waste Disposal Facility, the MOX Fuel Fabrication Plant and the Vitrified Waste Storage Center, exist in Rokkasho Village (Aomori Prefecture). After the accident at Fukushima Daiichi Nuclear Power Plant in 2011, special attention should be given to the relationship between radiation and human health, as well as establishing a system for managing with a radiation emergency...
April 18, 2017: Radiation Research
https://www.readbyqxmd.com/read/28414936/east-urals-radioactive-trace-dose-dependent-functional-metabolic-effects-in-the-myocardium-of-the-pygmy-wood-mouse-apodemus-uralensis-taking-into-account-population-size
#17
Nataĺya A Orekhova, Makar V Modorov
The population dynamics, radiometric data and biochemical parameters (concentrations of total lipids, proteins, DNA and RNA, activity of succinate dehydrogenase, glucose phosphate isomerase and catalase, as well as lipid peroxidation level) in the myocardium of the pygmy wood mouse (Apodemus uralensis Pall., 1811) inhabiting the area of the East Urals Radioactive Trace (EURT) were analyzed. The functional-metabolic radiation effects as a result external and internal exposure to (137)Cs and (90)Sr (unweighted total dose rate 0...
April 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28412010/assessment-of-impact-of-urbanisation-on-background-radiation-exposure-and-human-health-risk-estimation-in-kuala-lumpur-malaysia
#18
M S M Sanusi, A T Ramli, W M S W Hassan, M H Lee, A Izham, M N Said, H Wagiran, A Heryanshah
Kuala Lumpur has been undergoing rapid urbanisation process, mainly in infrastructure development. The opening of new township and residential in former tin mining areas, particularly in the heavy mineral- or tin-bearing alluvial soil in Kuala Lumpur, is a contentious subject in land-use regulation. Construction practices, i.e. reclamation and dredging in these areas are potential to enhance the radioactivity levels of soil and subsequently, increase the existing background gamma radiation levels. This situation is worsened with the utilisation of tin tailings as construction materials apart from unavoidable soil pollutions due to naturally occurring radioactive materials in construction materials, e...
April 12, 2017: Environment International
https://www.readbyqxmd.com/read/28411847/the-molecular-revolution-in-cutaneous-biology-era%C3%A2-of-cytogenetics-and-copy-number%C3%A2-analysis
#19
REVIEW
Jürgen Bauer
Development of karyotyping techniques in the 1950s sparked groundbreaking reports of chromosomal aberrations in cancer, such as the Philadelphia chromosome in chronic myelogenous leukemia in 1960, followed by a number of others. Spatial resolution of karyotyping is limited and vital tumor cells are required for metaphase preparation. To overcome these limitations, DNA hybridization techniques were developed. In situ hybridization of radioactively or fluorescence labeled RNA probes onto tumor samples allowed the identification of specific genomic regions, translocations and copy number alterations...
May 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28411822/label-free-and-sensitive-assay-for-deoxyribonuclease-i-activity-based-on-enzymatically-polymerized-superlong-poly-thymine-hosted-fluorescent-copper-nanoparticles
#20
Lan Luo, Fengzhou Xu, Hui Shi, Xiaoxiao He, Taiping Qing, Yanli Lei, Jinlu Tang, Dinggeng He, Kemin Wang
Deoxyribonuclease I (DNase I) is an important physiological indicator and diagnostic biomarker, but traditional methods for assessing its activity are time-consuming, laborious, and usually radioactive. Herein, by effectively combining the special functions of DNase I and terminal deoxynucleotidyl transferase (TdT), a simple, green, cost-effective, label-free and ultrasensitive assay for DNase I activity has been constructed based on superlong poly(thymine)-hosted copper nanoparticles (poly T-CuNPs). In this strategy, a 3'-phosphorylated DNA primer is designed to block TdT polymerization...
July 1, 2017: Talanta
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