Results 71 to 80 of about 23,825,632 (222)

Ngarrawa (mound spring) sediments as archives of Holocene environmental change in arid central Australia: Insights from Itrax XRF scanning

Journal of Quaternary Science, EarlyView.
ABSTRACT Central Australia's ngarrawa, or ‘mound springs’, are unique hydrological systems that serve as some of the only near‐permanent sources of water and continuous sediment deposition in Australia's arid interior. As such, they hold significant potential as palaeo‐climate and ‐environmental archives in a region where many aspects of past climate ...
Fletcher C. Nixon, Jonathan J. Tyler, Patricia S. Gadd, Quan Hua   +3 more
wiley   +1 more source

Tooth Discoloration Induced by Calcium Silicate-based Sealers

Journal of Advances in Medicine and Medical Research
Aims: The propose of this study was to evaluate, using spectrophotometric analysis, the change in tooth color induced by different calcium silicate-based sealers over the period of 24 hours and 30 days. Methodology: Sixty bovine teeth were sectioned in enamel-dentin blocks.
David Saldanha de Brito Alencar, Larissa Carvalho Novaes Batista, Jaqueline Martins Crivelari, Andre Luiz Almeida de Abreu, Anna Carolina Neves Leutz, Arian Braido, Leandro Ferreira Frade Soares, Bruno Martini Guimarães, Marina Angélica Marciano   +8 more
openaire   +1 more source

Intercomparison of carbon‐13 and carbon‐14 tracer approaches for estimating marine calcification and net primary production

Limnology and Oceanography: Methods, EarlyView.
Abstract Accurate measurements of phytoplankton net primary production (NPP) and calcification are essential for quantifying marine carbon cycling, yet in situ calcification rates remain poorly constrained. We compared 13C‐ and 14C‐based tracer methods for NPP in laboratory cultures of the diatom Chaetoceros tenuissimus and the coccolithophore ...
Chloe L. Smith, Austin Grubb, Kay D. Bidle, Kimberlee Thamatrakoln, Adam V. Subhas   +4 more
wiley   +1 more source

Evaluation of intratubular penetration of Bio-C Sealer: a calcium silicate-based sealer

, 2022
Este estudio tuvo como objetivo evaluar la penetración intratubular de Bio-C Sealer usando microscopía de escaneo láser confocal (CLSM). Sesenta caninos se dividieron en cuatro grupos (n = 15): Bio-C Sealer, Endo Sequence BC Sealer, Sealer Plus BC y AH Plus. De cada muestra se obtuvieron tres discos de 1 mm de espesor y se analizaron para determinar el
Pelisser, Edson, Matoso , Felipe Barros, Kirchhoff, Alison Luis, Kopper, Patrícia Maria Poli, Baratto-Filho, Flares, Gonzaga , Carla Castiglia, Tomazinho, Flávia Sens Fagundes   +6 more
openaire   +1 more source

Behavior of Injection‐Molded Nylon 6 Composites With Virgin and Field‐Exposed Waste‐Recycled Blends

Polymer Composites, EarlyView.
Recycling field‐exposed Nylon 6 composites for sustainable secondary applications. ABSTRACT Every year, more than 18,600 metric tonnes of glass fiber‐reinforced Nylon 6 composite waste from sucker rod guides used in downhole oil and gas applications are landfilled due to uncertainty about retained performance after prolonged service exposure.
Chundu Gyem Tamang, Allan Manalo, Paulomi (Polly) Burey, Wahid Ferdous, Tristan Shelley, Mayur Patel, Tony Chapman   +6 more
wiley   +1 more source

Development of Cellulosic Bioplastic‐Based Biocomposites for Biodegradable Packaging Applications: Effect of High Acetyl Content and High Filler Loading

Polymer Engineering &Science, EarlyView.
Schematic representation of the development of cellulosic bioplastic‐based biocomposites via reactive extrusion and injection molding, demonstrating improved oxygen and water vapor barrier properties for biodegradable packaging applications. ABSTRACT Cellulosic bioplastics have attained significant interest because of their biodegradability and ...
Reshma Krishnan, Manjusri Misra, Amar K. Mohanty   +2 more
wiley   +1 more source

Reactivity of Oxidized Porous Silicon with Calcium Ion in Aqueous Media: Stability, pH Behavior, and Host‐Guest Strategies

Small, EarlyView.
Oxidized porous silicon, composed of an elemental silicon porous skeleton coated with a silica shell, reacts with aqueous Ca2+ to generate a mixed silica–calcium silicate matrix that is remarkably efficient at trapping small molecules. With an emphasis on the engineering of controlled‐release drug delivery systems, this study identifies the factors ...
Ruhan Fan, Qinglin Yang, Michael J. Sailor   +2 more
wiley   +1 more source

Hydrogen‐Based Reduction of Hematitic Iron Ore in a Fluidized Bed Kinetic Reactor at Elevated Pressures

steel research international, EarlyView.
This study investigates the reduction behavior of two international iron ores, including a synthetic hematite produced by oxidation of magnetite, in a novel fluidized‐bed kinetic reactor at elevated pressures. The reduction takes place at various temperatures (650°C, 700°C, and 750°C), and various hydrogen partial pressures (30, 55, and 80 vol% H2 ...
Valentina Nigitz, Aaron Wieder, Sandra Jezernik, Christoph Ahr, Mark Berchtold, Franz Winter   +5 more
wiley   +1 more source

Thermodynamics and Kinetics of Ammonia‐Based Reduction of Natural Hematite

steel research international, EarlyView.
Ammonia is investigated as a carbon‐free hydrogen carrier for reducing natural hematite into metallic iron. Higher temperature and smaller particle size promote faster reduction, while ammonia dissociation generates hydrogen that indirectly drives the reduction reaction. At 850 °C, high reduction degrees and porous metallic iron structures are achieved,
Medard Turyasingura, Basit Ali, Michael Lubwama, Peter Wilberforce Olupot, Marcel A. J. Somers   +4 more
wiley   +1 more source

Biocompatibility and bioactive potential of new bioceramic sealers in rat bone tissue: histological analysis

Brazilian Dental Science
Objective: Sealer Plus BC and Bio-C Sealer are new silicate-based sealers. We aimed to evaluate the biocompatibility and bioactivity of these silicate-based endodontic sealers compared to that of AH Plus epoxy resin sealer. Material and Methods: Fifteen
Marcus Victor Vaz Soares Castro, Wanderson Carvalho de Almeida, Humbelina Alves da Silva, Bruna da Silva Firmino, Daniel Fernandes Falcão, Lucas Fernandes Falcão, Moara Santos Conceição Pinto, Antonione Santos Bezerra Pinto , Maria Ângela Arêa Leão Ferraz, Carlos Alberto Monteiro Falcão   +9 more
doaj   +1 more source