Article
Quantum Science & Technology
Akmal A. Sakr, Mohamed F. Ghaly, Howell Edwards, Yahia Elbashar
Summary: Streptomyces contribute to the color alteration of mural paintings by producing acids that react with certain pigments, resulting in green hues.
NONLINEAR OPTICS QUANTUM OPTICS-CONCEPTS IN MODERN OPTICS
(2023)
Article
Construction & Building Technology
Nuria Oriols, Nati Salvado, Trinitat Pradell, Nuria Jimenez, Marine Cotte, Victor Gonzalez, Salvador Buti
Summary: This study proposes an innovative approach using various micro-analytical imaging techniques to simulate and evaluate the effects of different conditions on the carbonation process in dolomitic mortars. The presence of Mg2+ was found to influence the microstructure and composition of dolomitic mortars, explaining the instability of aging dolomitic mortars observed in historical fresco paintings.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Mineralogy
Erik B. Melchiorre
Summary: The Girilambone copper deposit in New South Wales, Australia, is a model for the development of an oxidation zone profile in an environment without active tectonics and fluctuating local water table. By comparing with the Girilambone deposit, the oxidation zone of other copper deposits can be interpreted in terms of recent tectonic activity, paleoclimate, and water table stability.
MINERALOGICAL MAGAZINE
(2022)
Article
Geochemistry & Geophysics
Sylwia Svorova Pawelkowicz, Barbara Wagner, Jakub Kotowski, Grazyna Zofia Zukowska, Bozena Golebiowska, Rafal Siuda, Petras Jokubauskas
Summary: This study investigates the importance of identifying impurities in green and blue copper pigments in paint layers for classification of paintings and provenance studies. Analyses of copper pigments layers from wall paintings in Poland were compared with copper minerals from different deposits. The study reveals the first quantitative analyses of impurities in copper pigments.
Article
Chemistry, Analytical
Estibaliz Lama, Nagore Prieto-Taboada, Idoia Etxebarria, Juan Bermejo, Kepa Castro, Gorka Arana, Maria Dolores Rodriguez Laso, Juan Manuel Madariaga
Summary: A multi-analytical approach was used to characterize the mural paintings in Punta Begona galleries in Spain, filling gaps in historical documentation. Various spectroscopic and microdestructive techniques were employed to identify original pigments and nature of paintings, revealing historical details and changing the perception of the heritage. This analytical chemistry study contributes to a deeper understanding of the murals and the building's historical significance.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Michela Ricca, Maria Francesca Alberghina, Negin Derakhshan Houreh, Aybuke Sultan Koca, Salvatore Schiavone, Mauro Francesco La Russa, Luciana Randazzo, Silvestro Antonio Ruffolo
Summary: A multi-analytical approach was employed to study wall paintings located in the Sotterra church at Paola, Italy. The study provided valuable information about the construction, materials used, and artist's technique of the selected wall painting, contributing to historical and artistic studies of the religious site.
Article
Computer Science, Software Engineering
Imanol Munoz-Pandiella, Carlos Andujar, Begonya Cayuela, Xavier Pueyo, Carles Bosch
Summary: Digital color restitution aims to restore the original colors of a painting through digital means. To address the limitations of existing image editing applications, we propose an automated workflow that only requires input of representative source and target colors from art historians. This approach allows for the restoration of colors in large collections of paintings or different regions of the same painting.
COMPUTERS & GRAPHICS-UK
(2023)
Article
Chemistry, Multidisciplinary
Ioana Gomoiu, Roxana Cojoc, Robert Ruginescu, Simona Neagu, Madalin Enache, Maria Dumbravician, Ioana Olteanu, Roxana Radvan, Luminita Ghervase
Summary: This study evaluates the degradation of two commercial consolidants and one national artisanal consolidant, as well as the deteriorative potential of melanised fungi. The results show that fungi can produce organic substances that degrade the consolidants. Mycelia produced by melanised fungi have an impact on the consolidants applied on experimental models and fresco fragments. Among the tested biocides, Biotin R (R) is found to be the most effective treatment against fungi.
APPLIED SCIENCES-BASEL
(2022)
Article
Geochemistry & Geophysics
Jose Luis Ruvalcaba-Sil, Luis Barba, Edgar Casanova-Gonzalez, Alejandro Mitrani, Margarita Munoz, Isaac Rangel-Chavez, Miguel angel Maynez-Rojas, Jaqueline Canetas
Summary: The Techinantitla building complex in Teotihuacan is known for its mural paintings, which have suffered significant losses due to looting. Recent interdisciplinary research has focused on studying the remaining heritage through geophysical techniques and non-invasive methodologies, leading to the discovery of possible additional murals and the identification of standardized mural painting practices during the Xolapan period in Teotihuacan.
Article
Chemistry, Multidisciplinary
Silvia Perez-Diet, Luis Javier Fernandez-Menendez, Hector Morillas, Alberta Martellone, Bruno De Nigris, Massimo Osanna, Nerea Bordel, Francesco Caruso, Juan Manuel Madariaga, Maite Maguregui
Summary: Pyroclastic strata were traditionally believed to protect the archaeological remains of the Vesuvian area, but new research suggests they may actually pose a threat to the preservation of mural paintings in Pompeii by causing salt crystallization. Thermodynamic modeling helps predict salt precipitation and identify sources of sulfates, with fluorine proposed as a marker for monitoring the impact on the paintings in situ.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Ilaria Costantini, Julene Aramendia, Eugenia Tomasini, Kepa Castro, Juan Manuel Madariaga, Gorka Arana
Summary: The multianalytical study of late-gothic wall paintings in the Romanic church of Saint Ementerio and Saint Celedonio of Goikolexea involved in situ analysis using Raman spectroscopy and energy-dispersive X-ray fluorescence to identify original compounds and restoration materials. Difficulties in identifying the original pictorial layer were encountered due to modern retouching and acrylic resin, leading to the use of laboratory Raman measurements to characterize pigments and decay products linked to environmental factors.
MICROCHEMICAL JOURNAL
(2021)
Article
Optics
Thea de Seauve, Vincent Detalle, Alexandre Semerok, Sebastien Aze, Olivier Grauby, Sophie Bosonnet, Kevin Ginestar, Jean-Marc Vallet
Summary: The study discusses the possibility of inducing reconversion reactions in red lead and lead white pigments through CW laser heating, with successful results achieved using Ar+, 810 nm diode, and Nd:YAG lasers. The thermodynamic study and laser irradiation trials confirmed the formation of minium and subsequent massicot from plattnerite, offering a suitable method for restoration purposes.
APPLIED PHYSICS B-LASERS AND OPTICS
(2021)
Article
Optics
Thea de Seauve, Sophie Bosonnet, Olivier Grauby, Alexandre Semerok, Vincent Detalle, Jean-Marc Vallet
Summary: This article investigates the use of chemical methods to treat the issue of lead white pigments in ancient mural paintings blackening over time, and proposes the possibility of thermally reconverting the black pigments to white lead carbonates via a massicot intermediate.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Physics, Multidisciplinary
Anabelle Kriznar
Summary: The research aims to understand whether the materials and painting techniques used by Aquila and his workshop correspond to North European or South European, mainly Italian, contemporary painting methods.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Geochemistry & Geophysics
Ilkay Kaydu Akbudak, Zeynel Basibuyuk, Meltem Gurbuz
Summary: The silicified wood formations in Zile district of Tokat province in Turkey consist of a variety of minerals and colors, suitable for jewelry production. However, further exploration is needed to determine the reserves and distribution of these formations.
LITHOLOGY AND MINERAL RESOURCES
(2021)
Article
Biochemistry & Molecular Biology
Luz America Cordoba-Castro, Rosalba Salgado-Morales, Martha Torres, Lourdes Martinez-Aguilar, Luis Lozano, Miguel Angel Vences-Guzman, Ziqiang Guan, Edgar Dantan-Gonzalez, Mario Serrano, Christian Sohlenkamp
Summary: The genus Burkholderia sensu lato consists of a diverse group of bacterial species with unique characteristics such as the presence of two forms of phosphatidylethanolamine (PE) and ornithine lipids (OLs). Only Burkholderia sensu stricto strains constitutively form OLs, while other strains in the group form two forms of PE but no OLs. The absence of OLs in B. cenocepacia affects bacterial growth under specific abiotic stress conditions, while OLs may play an important role in activating the innate immune response in eukaryotes.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2021)
Article
Microbiology
Miguel Angel Vences-Guzman, Rafael Pena-Miller, Nancy Adriana Hidalgo-Aguilar, Maritza Lorena Vences-Guzman, Ziqiang Guan, Christian Sohlenkamp
Summary: Sulfonolipids (SLs) are bacterial lipids structurally similar to sphingolipids, mainly synthesized by Flavobacterium and other Bacteroidetes. These lipids have diverse biological activities, including inducing multicellularity and acting as von Willebrand factor receptor antagonists. The identification of cysteate-fatty acyl transferase Fjoh_2419 in F. johnsoniae provides new insights for studying the biological effects of SLs.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Editorial Material
Biochemistry & Molecular Biology
Christian Sohlenkamp
Summary: A recent study identified a cardiolipin synthase from the archaeon Methanospirillum hungatei, which can synthesize various types of cardiolipin species. This discovery could potentially revolutionize synthetic lipid biology by allowing the construction of diverse lipids with nonnatural head groups and mixed archaeal/bacterial hydrophobic chains.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2021)
Article
Microbiology
Claudia Velazquez-Sanchez, Miguel Angel Vences-Guzman, Soledad Moreno, Raunel Tinoco-Valencia, Guadalupe Espin, Josefina Guzman, Diana X. Sahonero-Canavesi, Christian Sohlenkamp, Daniel Segura
Summary: The inactivation of PsrA in Azotobacter vinelandii reduces the synthesis and content of unsaturated fatty acids, resulting in decreased cell viability. This study demonstrates the important role of PsrA in the regulation of unsaturated fatty acid metabolism by positively regulating fabAB.
MICROBIOLOGICAL RESEARCH
(2021)
Article
Microbiology
Beatriz Aragon-Aranda, Leyre Palacios-Chaves, Miriam Salvador-Bescos, Maria Jesus de Miguel, Pilar M. Munoz, Miguel Angel Vences-Guzman, Amaia Zuniga-Ripa, Leticia Lazaro-Anton, Christian Sohlenkamp, Ignacio Moriyon, Maite Iriarte, Raquel Conde-Alvarez
Summary: Brucellae use phosphatidylcholine to mimic eukaryotic features and evade host innate immune responses. There are two known synthesis pathways - Pmt and Pcs, and some Brucella strains synthesize phosphatidylcholine exclusively via the Pcs pathway.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Plant Sciences
Otto Geiger, Christian Sohlenkamp, Diana Vera-Cruz, Daniela B. Medeot, Lourdes Martinez-Aguilar, Diana X. Sahonero-Canavesi, Stefan Weidner, Alfred Puehler, Isabel M. Lopez-Lara
Summary: The lack of phosphatidylcholine (PC) in Sinorhizobium meliloti membrane activates the ExoS/ChvI two-component regulatory system, leading to transcriptional and protein level changes that affect bacterial motility and succinoglycan biosynthesis.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Chemistry, Analytical
Mohamed Abdel-Harith, Asmaa Elhassan, Zienab Abdel-Salam, Mona F. Ali
Summary: A straightforward method utilizing metallic reflectors to improve signal-to-noise ratio of LIBS spectra in transparent samples has shown significant enhancement. This new setup has been successfully applied for elemental analysis of colored glass fragments from Egyptian Synagogue windows, showing promising results. The technique can be further applied to analyze various transparent target types with potential for enhanced spectral line intensity.
ANALYTICA CHIMICA ACTA
(2021)
Article
Plant Sciences
Domenica Khiabet Brazales-Cevallos, Yordan Jhovani Romero-Contreras, Miguel Angel Vences-Guzman, Martha Torres, Norma Yaniri Aviles-Baltazar, Christian Sohlenkamp, Mario Serrano
Summary: The leaf extract of Moringa oleifera has the potential to improve plant growth and stress tolerance, but its molecular mechanisms are not well understood and further research is needed to elucidate them.
SOUTH AFRICAN JOURNAL OF BOTANY
(2022)
Article
Immunology
Hadeer Mamdouh Ahmed Eldeeb, Mona F. Ali, Maisa M. A. Mansour, Maha Ahmed Ali Ahmed, Mohamed Z. M. Salem
Summary: This study focused on isolating and identifying fungi from old albumen prints and evaluating their ability to cause deterioration. Four fungal species were identified, and it was found that some of them can cause hydrolysis and oxidation to the prints.
MICROBIAL PATHOGENESIS
(2022)
Article
Archaeology
M. Ali, H. Kalil, M. Mohamed
Summary: This study presents the results of various analytical techniques applied to a painted wooden stela in the Egyptian Museum in Cairo. The analysis revealed the composition of the stela, including its wooden support, prepared layer, and pigments. The study also focused on the presence of active fungi on the wood, as well as the use of a tempera technique and the specific pigments used.
EGYPTIAN JOURNAL OF ARCHAEOLOGICAL AND RESTORATION STUDIES
(2022)
Article
Art
Rasha Shaheen, Abdelrahman M. Elserogy, Shaaban Abd Elaa, Mona Ali, Abdelrahman Metwaly, Mohamed Eida, Ahmed Gad
Summary: This paper presents the identification of microentities growing on gelatin photograph prints and discusses the study of using Nanomaterials to treat microbiological damage on gelatin photographs. UV photography and USB microscope were used to study the distribution and appearance of biological damage on the image surface. Additionally, the growth requirements of these microorganisms were determined and recommendations were made to control temperature and humidity to prevent their growth.
INTERNATIONAL JOURNAL OF CONSERVATION SCIENCE
(2022)
Article
Archaeology
M. Ali, M. Abdel-Ghani, N. Abou Seif
Summary: The poor storage conditions in the basement of the Egyptian Museum resulted in severe damage to a multi-piece mummy cartonnage from the Late Period. The research paper examined and analyzed the layers' structure of the cartonnage, revealing the use of different canvas supports and pigments.
EGYPTIAN JOURNAL OF ARCHAEOLOGICAL AND RESTORATION STUDIES
(2022)
Article
Archaeology
H. Eldeeb, M. Ali, M. Mansour
Summary: Albumen prints, the most important photographic prints of the late 19th century, are facing threats to their permanence due to various factors. In this study, a private collection of albumen prints dating back to 1890 was analyzed. The results showed cracks and chemical degradation in the albumen layer, as well as oxidation and hydrolysis in the secondary supports. Based on these findings, conservation procedures including disinfection, dry cleaning, tear mending, retouching, and rehousing were conducted.
EGYPTIAN JOURNAL OF ARCHAEOLOGICAL AND RESTORATION STUDIES
(2022)
Article
Archaeology
M. Ali, Sh Omar
Summary: This research paper discusses the deterioration aspects of the Mihrab of Madrasa Gawhariyya, attached to Al-Azhar Mosque, and aims to study these aspects using different methods of examination and analysis, such as visual and optical examinations, Scanning Electron Microscope attached to Energy Dispersive X-ray Spectrometer, and X-ray Diffraction (XRD). The results obtained provide important insights into the deterioration processes of the Mihrab.
EGYPTIAN JOURNAL OF ARCHAEOLOGICAL AND RESTORATION STUDIES
(2021)
Article
Multidisciplinary Sciences
Hesham Hakem, Mona F. Ali, Miroslav Barta, Ashraf Youssef
Summary: The study revealed that the limestone false door in Abusir suffers from various deterioration factors, including distortions, cracks, and disappearance of paint. It belongs to micrite limestone and requires conservation efforts to prevent further damage.
JOURNAL OF SCIENCE AND ARTS
(2021)
Article
Microbiology
Vera Analise Schommer, Mateus Torres Nazari, Flavia Melara, Julia Catiane Arenhart Braun, Alan Rempel, Lara Franco dos Santos, Valdecir Ferrari, Luciane Maria Colla, Aline Dettmer, Jeferson Steffanello Piccin
Summary: This review introduces the techniques and mechanisms of bacteria immobilization on biochar, as well as its applications in bioremediation and agriculture. The immobilization characteristics of biochar depend on pyrolysis methods, raw materials, and properties of biochar. Scanning electron microscope and colony forming unit analysis are commonly used to verify the immobilization efficiency. Applying biochar-immobilized bacteria can improve soil quality, plant growth, and crop yield.
MICROBIOLOGICAL RESEARCH
(2024)
Article
Microbiology
Manoj Kumar Solanki, Naveen Chandra Joshi, Prashant Kumar Singh, Sandeep Kumar Singh, Gustavo Santoyo, Lucas Carvalho Basilio de Azevedo, Ajay Kumar
Summary: The rhizosphere microbiome plays a crucial role in plant growth and health. Rhizosphere engineering can be used to modify the microbiome and improve plant productivity and resilience.
MICROBIOLOGICAL RESEARCH
(2024)
Article
Microbiology
Xin Cao, Xing-Wang Cheng, Yin-Ying Liu, Hong-Wei Dai, Ren-You Gan
Summary: Maintaining oral health is crucial for overall well-being. Imbalances in oral microorganisms can lead to various infectious diseases. Exploring alternatives for prevention and management of oral infections is important due to limitations of current treatments. Natural products offer potential as reliable, effective, and affordable therapeutic options for oral infectious diseases.
MICROBIOLOGICAL RESEARCH
(2024)
Article
Microbiology
Jose David Flores-Felix, Ana Carolina Goncalves, Sara Meirinho, Ana Raquel Nunes, Gilberto Alves, Cristina Garcia-Viguera, Diego A. Moreno, Luis R. Silva
Summary: The application of bacterial biofortifiers is increasing and has been shown to improve the nutritional characteristics of blueberries in Portugal.
MICROBIOLOGICAL RESEARCH
(2024)
Review
Microbiology
Asma Sani, Wan-Qi Qin, Jia-Yi Li, Yi-Fan Liu, Lei Zhou, Shi-Zhong Yang, Bo-Zhong Mu
Summary: This article summarizes the structural diversity of microbial lipopeptide biosurfactants and their applications as biocontrol agents in plants. Lipopeptides have low toxicity and wide range of applications, making them important in the pesticide industry.
MICROBIOLOGICAL RESEARCH
(2024)
Article
Microbiology
Xiao-Yu Sun, Jie Deng, Chenhui Zhang, Sin-Yee Fung, Kam-Leung Siu, Ying-Ying Cheng, Liumei Ye, Jiaoxia Qin, Ke Wang, Jiu-Xin Qu, Wenying Gao, Fuxiang Wang, Dong-Yan Jin, Liang Yang
Summary: In this study, a novel c-di-GMP binding protein SodA that regulates oxidative stress tolerance in S. maltophilia was identified. The enzyme activity of SodA was shown to be directly modulated by c-di-GMP through various in vivo and in vitro experiments.
MICROBIOLOGICAL RESEARCH
(2024)
