Article
Chemistry, Physical
Catalin Onutu, Dragos Ungureanu, Dorina Nicolina Isopescu, Nicoleta Vornicu, Ionut Alexandru Spiridon
Summary: Cultural and religious heritage assessments and restorations are essential for modern societies, as they connect us to our past. Repair and replacement techniques are commonly used to address the degradation and collapse of heritage buildings caused by earthquakes. The study on the Frumoasa monastic complex in Romania uses microscopic, spectroscopy, and petrographic approaches to determine suitable criteria for stone replacement.
Article
Multidisciplinary Sciences
Benjamin Utting
Summary: This paper presents the results of geochemical sourcing analysis of prehistoric stone tools from Trang An, shedding light on mobility and raw material provisioning strategies in Pleistocene hunter-gatherer populations in mainland Southeast Asia and raising questions about the relationship between technological organization, raw material, and expediency in Southeast Asian stone tool assemblages.
Article
Public, Environmental & Occupational Health
Luana F. Tanaka, Olaf Schoffer, Jochem Koenig, Veronika Weyer-Elberich, Maria Blettner, Stefanie J. Klug
Summary: This study analyzed baseline data from the MARZY study conducted in Germany from 2005 to 2007 to assess the prevalence of hysterectomy in women aged 30-65 years. The results showed that the prevalence of hysterectomy increased with age, with the highest rate occurring among women aged 60-64 years. The age at which hysterectomy occurred also showed a trend of being postponed. The majority of hysterectomies were performed due to benign diseases.
Article
Archaeology
Ilya Antipov, Andrey Antonov, Denis Jolshin, Anton Savchenok, Anna Tarasenko, Dmitriy Yakovlev
Summary: The study examined the sourcing and selection of natural stone in ancient architecture, revealing the significance of differentiating between types of stone for different purposes. Laboratory analysis proved instrumental in understanding the historical practices of stone selection for medieval buildings.
JOURNAL OF CULTURAL HERITAGE
(2021)
Article
Chemistry, Analytical
Leona J. Bauer, Richard Gnewkow, Frank Foerste, Daniel Groetzsch, Semfira Bjeoumikhova, Birgit Kanngiesser, Ioanna Mantouvalou
Summary: The combination of brilliant liquid metal jet sources (LMJS) and polycapillary lenses can significantly improve the excitation efficiency of traces of transition metals by micro-X-ray fluorescence spectroscopy (mu XRF) in the laboratory. By optimizing the parameters of polycapillary lenses and energy dependent influence of the source spot size, a significant increase in excitation efficiency for specific elements can be achieved, resulting in clearer and more detailed analysis results.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Chemistry, Analytical
Xiao-Sheng Lin, Li-Li Zhang, Jiu-Hua Xu, Yan He, Yi Zheng, Shuai Yan, Dong-Xu Liang, Ai-Guo Li
Summary: The study introduces a confocal synchrotron radiation micro-X-ray fluorescence imaging setup using K-B mirrors and polycapillary optics at a synchrotron facility, which enables depth resolution and quantitative calculation for elemental distribution images.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Multidisciplinary Sciences
Francesco P. Romano, Enzo Puglia, Claudia Caliri, Danilo P. Pavone, Michele Alessandrelli, Andrea Busacca, Claudia G. Fatuzzo, Kilian J. Fleischer, Carlo Pernigotti, Zdenek Preisler, Christian Vassallo, Gertjan Verhasselt, Costanza Miliani, Graziano Ranocchia
Summary: The use of lead-drawn ruling lines in ancient Greek papyrus rolls has been confirmed through noninvasive MA-XRF imaging spectroscopy. Experimental evidence has shown that scribes deliberately used slanted text columns as an aesthetic choice, resolving previous disputes.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Wael Badawy, Igor Silachyov, Andrey Dmitriev, Svetlana Lennik, Gehad Saleh, Mohamed Mitwalli, Ali El-Farrash, Mohammed Sallah
Summary: The study utilized different analytical methods to accurately analyze the elemental composition of 28 felsite rock samples. The results revealed high levels of silicon and low levels of gold in the rocks, indicating heterogeneity and varying origins. The findings contribute valuable baseline data for the area and highlight its economic significance for Egypt.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Chemistry, Multidisciplinary
Yonggang Yao, Caijin Xiao, Pingsheng Wang, Chunlai Li, Qin Zhou
Summary: The nondestructive analysis of the Chang'E-5 lunar samples using instrumental neutron activation analysis (INAA) revealed significant differences in the composition of major, minor, and trace elements compared to Earth and Apollo lunar samples. The rare earth element (REE) pattern, as well as interesting element correlations, provide valuable insights into the formation and evolution of the Moon.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nuclear Science & Technology
Sardar Muhammad Shauddin
Summary: This study deals with neutronic analysis of a TRIGA Research Reactor in Bangladesh, comparing the reference core with six reconfigured cores. The reconfigured cores showed better performance than the reference core, with C-1 and C-3 cores being the most qualified.
ANNALS OF NUCLEAR ENERGY
(2021)
Review
Chemistry, Analytical
Monika Ogrizek, Ana Kroflic, Martin Sala
Summary: Particulate matter (PM) is the major threat to our health among all environmental pollutants, and its regular monitoring is required. To determine the concentrations of toxic metals and other elements in PM, microwave digestion inductively coupled plasma mass spectrometry (MW/ICPMS) and X-ray fluorescence (XRF) techniques are commonly used. This review paper critically assesses these two techniques as well as three others for element determination in PM deposited on filter media, and identifies XRF and LA-ICPMS as two promising surface techniques for the analysis of PM deposits.
TRENDS IN ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Edward Entalai Besi, Wai Keong Hooi, Runi Sylvester Pungga, Christina Seok Yien Yong, Muskhazli Mustafa, Rusea Go
Summary: This paper reports three new orchid records and three rare orchid recollections in Malaysia, providing brief descriptions, photographic illustrations, morphological comparisons, and artificial taxonomic keys.
Article
Geochemistry & Geophysics
Katarzyna Cwik, Markus Brostrom, Krister Backlund, Kenneth Fjader, Emil Hiljanen, Matias Eriksson
Summary: This paper presents an industrial case study on the thermal decrepitation of limestone in quicklime production. The study analyzes the correlation between chemical composition and thermal decrepitation, as well as the differences in decrepitation behaviors of limestone samples with similar chemical compositions. The results show that there is no strong correlation between chemical composition and thermal decrepitation. Additionally, the study reveals that the presence of a fracture network in the limestone can stabilize it and reduce thermal decrepitation.
Article
Engineering, Environmental
Xilong Peng, Yue Li, Shuang Liu, Tian Jiang, Wenjin Chen, Dan Li, Jiren Yuan, Feigao Xu
Summary: In this experiment, HAp-coated-stone composites/CS were successfully synthesized using chitosan, waste limestone, and diammonium hydrogen phosphate. The addition of chitosan improved the thermal stability of the composite while reducing the specific surface area. These composites showed promising potential in removing Cu (II) from solutions and exhibited good resistance to pH changes. The adsorption mechanism onto the surface of HAp-coated-stone/CS composites was proposed based on the experimental results.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Agronomy
Antony van der Ent, Lachlan W. Casey, Imam Purwadi, Peter D. Erskine
Summary: The innovative approach of using a handheld XRF device for non-destructively extracting quantitative elemental data from herbarium specimens has led to the discovery of numerous hyperaccumulator plants. Scanning mu-XRF analysis of herbarium specimens can provide insights into the true representation of abnormal concentrations of elements as hyperaccumulation and reveal patterns of elemental distribution for further studies.
Article
Chemistry, Inorganic & Nuclear
Mohamed A. E. Abdel-Rahman, Mohy Sabry, Mahmoud R. Khattab, Atef El-Taher, Sayed A. El-Mongy
Summary: Accurate radiological analysis of black sand ore samples can identify their radioisotopes and potential risks, providing valuable information for environmental monitoring. The samples analyzed in this study showed varying specific activity of uranium, thorium decay series, and potassium-40, with elevated levels of thorium and uranium.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Chemistry, Analytical
Hamdy A. M. Awad, Hesham M. H. Zakaly, Aleksey V. Nastavkin, Atef El-Taher
Summary: This study aimed to calculate the content of radioactive elements in the investigated granitic rocks in Um Taghir area of Egypt's Central Eastern Desert using radiative methods. The results showed that the concentrations of (226)Ra and Th-232 in the area are lower than the world's average and the average activities in Egyptian soil, while the radioactive content of potassium (K-40) is higher.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Inorganic & Nuclear
Wael M. Badawy, Octavian G. Duliu, Hussein El Samman, Atef El-Taher, Marina Frontasyeva
Summary: The study identified significant amounts of V, Cr, and Zr in Nile sediments, while considerable concentrations of Br and Ca were found in marine sediments. Pollution indices revealed localized polluted sites in both Nile and marine sediments. Overall, the hazard index of the investigated elements in both sediments exceeded tolerable values.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Energy & Fuels
Rehab M. El-Sharkawy, Elhassan A. Allam, Atef El-Taher, Esam Ramadan Shaaban, Mohamed E. Mahmoud
Summary: The study focused on designing novel ternary nanocomposites, PP/CdO-NPs-NBent, for effective gamma-ray shielding by doping polypropylene with cadmium oxide nanoparticles and nano-bentonite. Experimental results showed that the addition of CdO-NPs increased the mass attenuation coefficient, effective atomic number, and effective electron density of the nanocomposites, with the NC2 sample containing 40.0 wt% CdO-NPs exhibiting the best gamma-ray shielding performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Analytical
Eheb Massoud, Atef El-Taher, Laith Ahmed Najam, Reda Elsaman
Summary: In this study, the radioactivity level in soil samples collected from the area around a fertiliser factory in Upper Egypt was measured using gamma ray spectrometry. The concentrations of Ra-226, Th-232, and K-40 were determined, and the effect of the factory's exhaust on the radiological contents of the surrounding soil was investigated. The results showed that some radiological hazards exceeded the permissible level.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Hamdy A. Awad, Hesham M. H. Zakaly, Aleksey Nastavkin, Amira M. El Tohamy, Atef El-Taher
Summary: The shear zone of the El-Missikat area is considered one of the most important occurrences of uranium mineralization in the Central Eastern Desert of Egypt, characterized by tabular elongated zone of crushing and brecciation with silicification. The concentrations of natural radionuclides suggest the presence of U mineralization in granitic rocks and silica veins, mainly represented by radioactive minerals such as uranophane, kasolite, and U-bearing zircon.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Chemistry, Analytical
Mohamed M. Ghoneim, Elena G. Panova, Ahmed E. Abdel Gawad, Hamdy A. Awad, Hesham M. H. Zakaly, Atef El-Taher
Summary: Based on Clarke analyses, geochemical series of chemical elements of the intrusive rocks of El Sela are identified. Microgranite and dolerite have the highest U-contents whereas the two-mica granite has high Th. Microgranite, two-mica granite, and bostonite belong to calc-alkaline affinity, while dolerite belongs to tholeiitic.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Atef El-Taher, Hesham M. H. Zakaly, Mariia Pyshkina, Elhassan A. Allam, Rehab M. El-Sharkawy, Mohamed E. Mahmoud, Mohamed A. E. Abdel-Rahman
Summary: A comparative study was conducted on the radiation shielding properties of plastic waste mixed with nano copper oxide and phosphotungstic acid using FLUKA code and Microshield software programs. The new nanocomposite was found to be effective in shielding gamma radiation due to the presence of dense materials like nano copper oxide and phosphotungstic acid. The results indicated that the mass attenuation coefficients and effective atomic and electron densities of the samples increased with higher PTA content, while the half-value layer, tenth value layer, and mean free path decreased.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Chemistry, Analytical
Ahmed E. Abdel Gawad, Mohamed A. Ali, Mohamed M. Ghoneim, Atef El-Taher
Summary: The study analyzed the eU and eTh contents in mylonite rocks using natural radiometric data and found enrichment of thorite, ishikawite, and zircon minerals. Ishikawite was identified as the mineral with the highest uranium content, while hydrothermal activity may have affected the HfO2 content in some zircon crystals.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Mohamed M. Ghoneim, Ahmed E. Abdel Gawad, Hamdy A. Awad, Zakaly Hesham M. H., Hamed I. Mira, Atef El-Taher
Summary: This study aims to investigate the distribution patterns of natural radioactivity and rare earth elements in 24 intrusive rocks from El Sela area in Egypt, and assess their impact on construction and adornment as well as potential radiation hazards.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Mohamed Shabib, Atef El-Taher, Nader M. A. Mohamed, Hashem A. Madkour, H. A. Ashry
Summary: The study found that the levels of natural radionuclides in coral reefs from the three areas were within safe limits, with radiological hazard parameters much lower than safety limits.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Hanan A. S. Aly, Atef El-Taher, Hossam S. Tork, Mohamed A. E. Abdel-Rahman
Summary: This study aims to compare the leaching characteristics of uranium isotopes in acidic and alkaline dissolving solutions with different concentrations. The results revealed that 40% sulfuric acid was able to dissolve a higher ratio of uranium isotopes under specific conditions.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Multidisciplinary Sciences
Wael M. Badawy, Octavian Duliu, Atef El-Taher, Ahmed Elsenbawy, Andrey Yu. Dmitriev, Ayman El-Gamal, Wafaa Arafa
Summary: A comprehensive dataset on the geochemical composition of unconsolidated shallow marine sediments in the coastal areas of Northern Nile Delta and Egyptian sector of Red Sea is presented. The dataset was analyzed using various statistical tests and methods, and it is of significant importance for assessing pollution levels, establishing geochemical background, and monitoring changes that pose a threat to the environment and human health.
Article
Chemistry, Analytical
Sherif A. A. Taalab, Meshari Al Meshari, Yasser Alzamil, Ahmad Abanomy, Amjad R. R. Alyahyawi, Waheed H. H. Mohamed, Atef El-Taher
Summary: The research area in Egypt's Central Eastern Desert is important for its valuable metal content. Episyenite rocks in this area serve as a trap for uranium mineralization. The study focused on evaluating the natural radioactive risk and pollution, finding high radioelement contents and low eTh/eU ratio in the rocks. Contour maps showed higher concentration of eU and eTh in the central and southeastern parts, while potassium was higher in the northeastern and southwestern parts. The radiological and ecological parameters exceeded the recommended international values in some samples, indicating unsafe use of the rocks in construction or infrastructure.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Hamdy A. M. Awad, Hesham M. H. Zakaly, Aleksey V. Nastavkin, Atef El-Taher
Summary: This study calculates radiological hazard parameters for samples of granites and jasperoid veins from Gable El-Missikat in the central-eastern desert of Egypt. The results show that all samples exceed the recommended maximum value of radiological hazard indices, posing a risk to the human environment.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)