Article
Pharmacology & Pharmacy
Luisa Di Marzio, Ana Borrego-Sanchez, Martina Felaco, MariaElena Pacinelli, Jaime Gomez-Morales, Nicola D'Avanzo, Claro Ignacio Sainz-Diaz, Christian Celia, Cesar Viseras
Summary: Drug delivery systems are important in biomedical research, and calcium carbonate particles have the potential to improve the dissolution rate of poorly water-soluble drugs and be used as a novel therapy for human helminthes infections.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Louiza Abidi, Frederic Amiard, Nicolas Delorme, Salim Ouhenia, Alain Gibaud
Summary: This paper aims to demonstrate the synthesis of superhydrophobic particles of calcium carbonate at a low cost using harmless and biocompatible natural products such as baking soda and olive oil. The particles were transformed into hydrophobic ones using soap made from olive oil, and various techniques were used to analyze their properties. The results showed that the particles exhibited superhydrophobicity and were functionalized by soap. The study also provided evidence of the efficiency of these particles in oil spill recovery.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Miroslaw Slowakiewicz, Andrzej Borkowski, Marcin D. Syczewski, Ida D. Perrota, Filip Owczarek, Anna Sikora, Anna Detman, Edoardo Perri, Maurice E. Tucker
Summary: It has been demonstrated that bacteriophages play a significant role in calcium carbonate formation by influencing the process of mineral precipitation and impacting the composition of carbonates. The viral-mediated mineral precipitation results in the formation of large aggregates consisting of spheroids, which are constructed of angular nanoparticles resembling viral-like particles. The study also suggests that bacteriophages control the stability of vaterite and influence the dominant form of the precipitates.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Xinmeng Fan, Christopher Batchelor-McAuley, Minjun Yang, Samuel Barton, Rosalind E. M. Rickaby, Heather A. Bouman, Richard G. Compton
Summary: This paper presents a new calibration method for the Coulter Counter to accurately measure the calcite content in cells. The method involves measuring and tracking the acid-driven calcite dissolution reaction to determine the amount of calcite in cells.
ANALYTICAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Carlos Rodriguez-Navarro, Luis Monasterio-Guillot, Miguel Burgos-Ruiz, Encarnacion Ruiz-Agudo, Kerstin Elert
Summary: Ancient Maya produced durable lime plasters using organics and calcite cement similar to biominerals. By adding polysaccharide-rich bark extracts, replicas with similar features were created, showing enhanced toughness and weathering resistance. The lime technology developed by ancient Maya exploited a biomimetic route for improving carbonate binders performance.
Article
Engineering, Chemical
Wei Li, Jing Yang, Shichao Du, Estevao Macaringue, Yan Wang, Songgu Wu, Junbo Gong
Summary: The study successfully prepared L-valine spherulites containing HPMC, showing that HPMC promotes the formation of L-valine spherulites. This finding offers a new method for spherulite design.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Kevin Ho, Kris S. Kim, Sissi de Beer, Gilbert C. Walker
Summary: Investigations on the transitional composition between two thin-film morphologies of the block copolymer, polystyrene-block-poly(tert-butyl acrylate) (PS-b-PtBuA), were conducted using near-field infrared spectroscopy and atomic force microscopy mechanical measurements. The techniques allowed for block identification with nanoscale spatial resolution and elucidated the material's sub-surface composition, revealing distinct patterns of PS and PtBuA formation in different regions of the polymer film.
Article
Chemistry, Multidisciplinary
David C. Green, Robert Darkins, Bartosz Marzec, Mark A. Holden, Ian J. Ford, Stanley W. Botchway, Bart Kahr, Dorothy M. Duffy, Fiona C. Meldrum
Summary: This study investigates the organization and structural properties of organic additives in calcite crystals by using optical properties of crystals grown in the presence of Congo red dye, analysis of surface adsorption, molecular simulations, and changes in crystal morphologies. The results show that under different growth rates, the orientation of dye molecules in the crystal varies, contributing to a better understanding of the thermodynamics involved in the occlusion process and potential for designing additives with specific material properties.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Jinseok Park, Anne Staiger, Stefan Mecking, Karen I. Winey
Summary: This study demonstrates that ionic functionality in a multiblock architecture can produce highly ordered nanostructures in thin films, including bicontinuous double gyroids. The researchers propose a versatile pathway to fabricating ordered nanostructures in thin films using ion-functionalized multiblock copolymers.
ACS CENTRAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhenghong Zhao, Wenting Chen, Qin Li, Biao Xiong, Yin Ning, Peihui Yang
Summary: This study presents a versatile approach to control the spatial distribution of guest species within inorganic crystals by incorporating anionic nanoparticles onto the surface of cationic nanoparticles, forming colloidal nanocomposite particles (CNPs). These CNPs can be incorporated into calcite single crystals in a spatially controlled manner. The colloidal stability of CNPs, determined by the adsorption density and calcium ion concentration, governs the depth of incorporation into calcite.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Michal W. Kepa, Takashi Tomizaki, Yohei Sato, Dmitry Ozerov, Hiroshi Sekiguchi, Nobuhiro Yasuda, Koki Aoyama, Petr Skopintsev, Jorg Standfuss, Robert Cheng, Michael Hennig, Soichiro Tsujino
Summary: Acoustic levitation plays a crucial role in chemical and biochemical analysis, but loading high viscosity samples is challenging. By using polymer thin films as sample holders and studying their acoustic levitation and rotation, it is possible to achieve controlled rotation and positional stability for the samples.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Multidisciplinary
Shyh-Tsong Lin, Hoang-Quy Le
Summary: Conventional optical interferometers used to gauge thin-film thickness provide non-contact, high-resolution, and full-field measurements but suffer from noise caused by environmental disturbances. A common-path tandem interferometer is proposed, which not only has the superior performance of conventional interferometers but also exhibits high measurement repeatability and tolerance to environmental disturbances. This paper demonstrates the measurement theory and experimental setup of the interferometer, presents and discusses the experimental results obtained using the setup. The results validate the interferometer, showing a measurement repeatability of up to 3 nm. Curve fitting inaccuracy is identified as one reason for measurement errors, and the results also confirm the interferometer's high resistance to environmental perturbations.
Article
Chemistry, Multidisciplinary
Guoguo Yang, Fuchun Li, Weiqing Zhang, Xinyuan Guo, Shitong Zhang
Summary: Research on the biogenic-specific morphology of carbonate minerals has made progress by conducting mineralization experiments using Arthrobacter sp. MF-2, demonstrating a particular disc-shaped morphology formed near the air/solution interface. The study also found that disc-shaped minerals were formed in experiments with the biofilms of strain MF-2, indicating the formation of a novel disc-shaped morphology assembled from calcite nanocrystals radiating out from the periphery of the template biofilms.
Article
Engineering, Chemical
Xin Wan, Duan Liu, Yi Ye, Jianhong Luo
Summary: A novel membrane dispersion microreactor has been developed for the preparation of CaCO3 nanoparticles using a chemical coprecipitation method. The synthesized CaCO3 products show smaller particle size, lower cost, and higher efficiency compared with traditional methods, making it of important application value.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Saeed Moghaddam, Sin Hang Cheung, Mario Noel, Joanne C. Zwinkels, Jean-Marc Baribeau, David J. Lockwood, Stephen K. O'Leary
Summary: This paper provides details on acquiring thin-film optical functions from experimental measurements, focusing on a case study with silicon thin films. It discusses the uncertainty in optical response measurements, the modeling of optical functions, and the elimination of unphysical solutions. The results presented are expected to be of interest to the broader thin-film community.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Multidisciplinary Sciences
Stephanie Duchamp-Alphonse, Giuseppe Siani, Elisabeth Michel, Luc Beaufort, Yves Gally, Samuel L. Jaccard
NATURE COMMUNICATIONS
(2018)
Article
Multidisciplinary Sciences
T. Beuvier, I. Probert, L. Beaufort, B. Sucheras-Marx, Y. Chushkin, F. Zontone, A. Gibaud
NATURE COMMUNICATIONS
(2019)
Article
Oceanography
I. W. Aiello, L. Beaufort, T. Goldhammer, V. B. Heuer, K-U Hinrichs, M. Zabel
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2020)
Article
Paleontology
Xiang Su, Chuanlian Liu, Luc Beaufort
MARINE MICROPALEONTOLOGY
(2020)
Article
Computer Science, Interdisciplinary Applications
Benjamin Bourel, Ross Marchant, Thibault de Garidel-Thoron, Martin Tetard, Doris Barboni, Yves Gally, Luc Beaufort
COMPUTERS & GEOSCIENCES
(2020)
Article
Paleontology
Baptiste Sucheras-Marx, Fabienne Giraud, Isabelle Daniel, Camille Rivard, Marie-Pierre Aubry, Karl-Heinz Baumann, Luc Beaufort, Remi Tucoulou, Alexandre Simionovici
Summary: Calcareous nannofossils are micrometric calcite platelets secreted by coccolithophores and incertae sedis, inhabiting various geological settings in different ages. The analysis of manganese distribution and valence in these nannofossils highlights its potential as a proxy for paleobiological or paleoenvironmental studies. The incorporation of manganese in nannofossils is controlled by diagenesis, with Mn being present in the form of MnCO3.
MARINE MICROPALEONTOLOGY
(2021)
Article
Geology
Gianni Mallarino, Jason M. Francis, Stephan J. Jorry, James J. Daniell, Andre W. Droxler, Gerald R. Dickens, Luc Beaufort, Samuel J. Bentley, Bradley N. Opdyke, Larry C. Peterson
Summary: In tropical and sub-tropical mixed siliciclastic-carbonate depositional systems, interactions between fluvial input and neritic carbonate are influenced by sea level, shelf physiography, and climate change at different timescales, with sea level and shelf physiography emerging as primary controls at the 100 kyr scale, and climate change playing a role during the unstable atmospheric and oceanic conditions of the last deglaciation at the millennial scale.
Article
Geochemistry & Geophysics
Samuel R. Phelps, Heather M. Stoll, Clara T. Bolton, Luc Beaufort, Pratigya J. Polissar
Summary: This study examines the factors influencing epsilon(p37:2) in the ocean, finding irradiance to be a key determinant in modern oceans. The research suggests that future estimations of CO2 based on epsilon(p37:2) should incorporate empirical or mechanistic models to quantitatively account for variations in irradiance and cell size.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Multidisciplinary Sciences
Luc Beaufort, Clara T. Bolton, Anta-Clarisse Sarr, Baptiste Sucheras-Marx, Yair Rosenthal, Yannick Donnadieu, Nicolas Barbarin, Samantha Bova, Pauline Cornuault, Yves Gally, Emmeline Gray, Jean-Charles Mazur, Martin Tetard
Summary: The study reveals that over the past 2.8 million years, Earth's orbital eccentricity has significantly influenced the morphological evolution of coccolithophores, leading them to adapt to different climate environments. Simulations suggest that changes in seasonal cycles directly impact the diversity of ecological niches in the ocean, affecting the morphology and carbonate export of coccolithophores.
Article
Ecology
El Mahdi Bendif, Ian Probert, Odysseas A. Archontikis, Jeremy R. Young, Luc Beaufort, Rosalind E. Rickaby, Dmitry Filatov
Summary: This study investigates the evolutionary relationships and ecological adaptations of G. huxleyi morphotypes across different environments. Results show that G. huxleyi is actually composed of at least three distinct species, and their divergence is related to glacial-cycle dynamics.
Article
Ecology
Martin Tetard, Laetitia Licari, Ekaterina Ovsepyan, Kazuyo Tachikawa, Luc Beaufort
Summary: OMZs are oceanic areas with low levels of dissolved oxygen, expanding due to global warming. A new method of oxygen reconstruction, using benthic foraminiferal tests, was developed and calibrated for use in different oceanic regions. This method, along with two others based on benthic foraminiferal assemblages and porosity of a single species, provided consistent past oxygenation reconstructions.
Article
Ecology
Luc Beaufort, Yves Gally, Baptiste Sucheras-Marx, Patrick Ferrand, Julien Duboisset
Summary: This study presents a new method for measuring crystal thickness that does not require calibration, is compatible with different cameras and microscopes, and does not need precise control of light intensity. The method uses bidirectional circular polarization and a simple equation to calculate thickness independently of calibration.
Article
Geosciences, Multidisciplinary
Martin Tetard, Ross Marchant, Giuseppe Cortese, Yves Gally, Thibault De Garidel-Thoron, Luc Beaufort
CLIMATE OF THE PAST
(2020)
Article
Geosciences, Multidisciplinary
Xinquan Zhou, Stephanie Duchamp-Alphonse, Masa Kageyama, Franck Bassinot, Luc Beaufort, Christophe Colin
CLIMATE OF THE PAST
(2020)
Article
Geosciences, Multidisciplinary
Priscilla Le Mezo, Luc Beaufort, Laurent Bopp, Pascale Braconnot, Masa Kageyama
CLIMATE OF THE PAST
(2017)
