Article
Geochemistry & Geophysics
Daniel E. Ibarra, Anastasia G. Yanchilina, Max K. Lloyd, Katharina A. Methner, C. Page Chamberlain, Ruth Yam, Aldo Shemesh, Daniel A. Stolper
Summary: The oxygen isotopic composition of silica preserved in oceanic sediments has been studied in this research. The results show that the transformation and recrystallization processes of biogenic opal-A to opal-CT to microquartz in deep sea sediments have significant effects on the triple oxygen isotopic composition of chert. The findings suggest that the local temperature gradients and pore fluid oxygen isotopic compositions influence the measured values of chert, deviating from triple oxygen isotopic equilibrium with seawater.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Birger Rasmussen, Janet R. Muhling
Summary: The study reveals the presence of greenalite in early deep-water laminated chert beds, suggesting the operation of a greenalite-silica shuttle mechanism where excess dissolved silica adsorbs onto settling Fe(II)-silicate nanoparticles. The appearance of abundant laminated chert beds, including thin intervals of banded iron formation, before the deposition of the Brockman Iron Formation at 2.49 Ga indicates a process of enhanced ocean ridge volcanism and transgression of vent plumes across a drowned shelf. The disappearance of basinal cherts and major BIFs after the Great Oxidation Event may signify the disruption or shutdown of the oceanic greenalite-silica shuttle mechanism.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Evangelos Stefanou, Nikolaos Kantiranis, Konstantinos Chatzicharalambous, Christina Mytiglaki, Michael Stamatakis, George Georgiadis
Summary: Diatomitic and clastic-volcanoclastic marly samples from the Paranisia area of Limnos Island were studied using various methods, and it was found that the diatomaceous samples are suitable for environmental uses such as absorbents, insulation brick production, or lightweight aggregates.
Article
Geosciences, Multidisciplinary
Shahab Varkouhi, Nicholas J. Tosca, Joseph A. Cartwright
Summary: This study investigated temperature-time relationship for silica diagenesis at various drilling sites, concluding that temperature is the fundamental driver of diagenesis. The opal-A to opal-CT transition zone thickness is controlled by geothermal gradients and sediment accumulation rates, with varying rates of diagenesis under different geological conditions.
Review
Geosciences, Multidisciplinary
Shahab Varkouhi, Joseph A. Cartwright, Nicholas J. Tosca, Dominic Papineau
Summary: The study evaluates diagnostic criteria for active migration of opal-A to opal-CT transition zone, indicating that a single criterion is unreliable and a synthesis of multiple criteria is needed for credible interpretation of silica diagenesis.
Article
Geology
Ahmed S. El-Hawat, Mohamed A. K. El-Ghali, Sue J. McLaren, Simon J. Kemp
Summary: This study used various techniques to elucidate the diagenesis of chert in the Messinian lagoonal carbonate-evaporite sequence in Cyrenaica region, and demonstrated the role of moganite in the formation of chalcedony during silicification. By analyzing different structural features, the formation mechanisms of quartzine and lutecite were revealed, playing a role in processes such as gypsum replacement and fluid flushing.
Article
Chemistry, Physical
Yu. A. Ubaskina
Summary: This study investigates the adsorption of methylene blue and eosin Y on opal-cristobalite rocks, and finds that the adsorption amount is determined by the content of amorphous silica and clay minerals in the rocks. The results also show the possibility of accurately determining the amorphous silica content in opal-cristobalite rocks using IR spectroscopy. Higher values of the point of zero charge in opal-cristobalite rocks are associated with lower silicon and aluminum contents, as well as higher total content of alkali and alkaline earth metals.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Andrea Borghesi, Felice Leopoldo Coviello, Alessandra Scrimieri, Pietro Ciolli, Marco Ravanelli, Davide Farina
Summary: The study aimed to evaluate the performance of the open-source software (ImageJ) in predicting the future growth of nonsolid nodules (NSNs) detected in a Caucasian (Italian) population. The results showed that skewness and linear mass density (LMD) were significantly associated with NSN growth, with skewness being the strongest predictor. According to the findings, NSNs with skewness value > 0.90, especially those with LMD > 19.16 mg/mm, should be closely monitored due to their higher growth potential and risk of becoming an active cancer.
Article
Geosciences, Multidisciplinary
Noga Vaisblat, Nicholas B. Harris, Korhan Ayranci, Matthew Power, Chris DeBhur, David L. Bish, Rick Chalaturnyk, Federico Krause, Vincent Crombez, Tristan Euzen, Sebastien Rohais
Summary: This study examines the impact of diagenetic processes on reservoir quality in the siltstone-dominated Montney Formation in Western Canada. Utilizing advanced petrographic methods, the research shows that siltstones maintain high porosity and permeability at shallow burial depths, differing from clay-rich mudstones.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Oncology
Mehdi Alilou, Prateek Prasanna, Kaustav Bera, Amit Gupta, Prabhakar Rajiah, Michael Yang, Frank Jacono, Vamsidhar Velcheti, Robert Gilkeson, Philip Linden, Anant Madabhushi
Summary: The new radiomic feature NIS can help distinguish lung adenocarcinomas from benign granulomas on non-contrast CT scans and potentially improve the performance of Lung-RADS. By reclassifying initially suspicious benign nodules, NIS has the potential to significantly reduce unnecessary biopsies and follow-up imaging.
Article
Medicine, General & Internal
Domenico Albano, Roberto Gatta, Matteo Marini, Carlo Rodella, Luca Camoni, Francesco Dondi, Raffaele Giubbini, Francesco Bertagna
Summary: This retrospective study investigated the predictive abilities of F-18-FDG-PET/CT metrics and RFs in determining the final diagnosis of solitary pulmonary nodules. Results showed that RFs played a significant role in predicting the diagnosis, with accuracies directly related to the scanner used.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Dagmar Grob, Luuk J. Oostveen, Colin Jacobs, Ernst Scholten, Mathias Prokop, Cornelia M. Schaefer-Prokop, Ioannis Sechopoulos, Monique Brink
Summary: Comparison between nodule enhancement on subtraction CT iodine maps and dual-energy CT iodine maps shows that subtraction CT is more effective in depicting iodine enhancement in pulmonary nodules, leading to improved visibility of nodules.
EUROPEAN JOURNAL OF RADIOLOGY
(2021)
Article
Biology
Yu Gu, Jingqian Chi, Jiaqi Liu, Lidong Yang, Baohua Zhang, Dahua Yu, Ying Zhao, Xiaoqi Lu
Summary: This paper summarizes the CAD approaches using deep learning for lung nodule detection on CT scan data. The technologies show promising results in improving the survival rate of lung cancer patients, but there are still challenges and limitations to be addressed.
COMPUTERS IN BIOLOGY AND MEDICINE
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jing Yan, Xing Xue, Chen Gao, Yifan Guo, Linyu Wu, Changyu Zhou, Feng Chen, Maosheng Xu
Summary: This study investigated a potential noninvasive method for predicting the Ki-67 proliferation index in patients with lung adenocarcinoma presenting with subsolid nodules. The findings suggest that the radiomics signature and nomogram both provide good predictive probabilities for Ki-67 expression in subsolid nodules.
QUANTITATIVE IMAGING IN MEDICINE AND SURGERY
(2022)
Article
Engineering, Chemical
Yating Gao, Jinzhi Li, Lijie Zhao, Yanlong Hong, Lan Shen, Youjie Wang, Xiao Lin
Summary: This study aims to improve the direct compaction properties of Citri Reticulatae Pericarpium powder by liquid dispersion co-processing with hydrophilic or hydrophobic nano-silica. The results showed that hydrophilic nano-silica significantly improved the tabletability of Citri Reticulatae Pericarpium powder, while hydrophobic nano-silica improved the flowability. The different distribution patterns and surface properties of the nano-silica were the key reasons for their different effects on the powder.
Article
Geosciences, Multidisciplinary
Walter E. Dean, James P. Kennett, Richard J. Behl, Craig Nicholson, Christopher C. Sorlien
Article
Geology
Karl B. Follmi, Patrick Thomet, Samuel Levy, Eric De Kaenel, Jorge E. Spangenberg, Thierry Adatte, Richard J. Behl, Robert E. Garrison
JOURNAL OF SEDIMENTARY RESEARCH
(2017)
Article
Geosciences, Multidisciplinary
Sarah M. White, Tessa M. Hill, James P. Kennett, Richard J. Behl, Craig Nicholson
Article
Geosciences, Multidisciplinary
K. Ohkushi, J. P. Kennett, C. M. Zeleski, S. E. Moffitt, T. M. Hill, C. Robert, L. Beaufort, R. J. Behl
Article
Geosciences, Multidisciplinary
Sarah E. Moffitt, Tessa M. Hill, Kenichi Ohkushi, James P. Kennett, Richard J. Behl
Editorial Material
Multidisciplinary Sciences
Richard J. Behl
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2011)
Article
Geography, Physical
Darrell S. Kaufman, Katherine Cooper, Richard Behl, Katharina Billups, Jordon Bright, Karleen Gardner, Paul Hearty, Martin Jakobsson, Isabel Mendes, Michael O'Leary, Leonid Polyak, Tine Rasmussen, Francisca Rosa, Matthew Schmidt
QUATERNARY GEOCHRONOLOGY
(2013)
Article
Geography, Physical
Leanne G. Hancock, Dalton S. Hardisty, Richard J. Behl, Timothy W. Lyons
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2019)
Article
Geography, Physical
T. M. Hill, J. P. Kennett, D. K. Pak, R. J. Behl, C. Robert, L. Beaufort
QUATERNARY SCIENCE REVIEWS
(2006)
Article
Multidisciplinary Sciences
T. M. Hill, J. P. Kennett, D. L. Valentine, Z. Yang, C. M. Reddy, R. K. Nelson, R. J. Behl, C. Robert, L. Beaufort
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2006)
Article
Ecology
Darwin C. Hall, Richard J. Behl
ECOLOGICAL ECONOMICS
(2006)
Article
Geography
SP Wechsler, DJ Whitney, EL Ambos, CM Rodrigue, CT Lee, RJ Behl, DO Larson, RD Francis, G Holk
JOURNAL OF GEOGRAPHY
(2005)
Article
Multidisciplinary Sciences
JP Kennett, KG Cannariato, IL Hendy, RJ Behl