Results 61 to 70 of about 5,041 (159)

A New Method for Exploring the Early Stages of the Crystallization of Small Organic Carboxylic Acids at Constant pH and Temperature and Quantitatively Assessing Additive Effects

Chemistry–Methods, Volume 6, Issue 7, July 2026.
We introduce a titration‐based method to explore the early stages of the crystallization of small organic molecules with carboxylic acid functions in water. It enables the determination of fundamental physicochemical characteristics (pKa values and solubilities) and the quantitative study of prenucleation, nucleation, and early postnucleation stages ...
Felix Lücke, Nils Sassenberg, Denis Gebauer   +2 more
wiley   +1 more source

Timelapse of a rotating vaterite within a living macrophage.avi

, 2022
Time-lapse videography of a trapped and rotating vaterite microsphere that had been internalised within a living macrophage. The vaterite is approximately 1um in diameter within a ~2.5um macropinosome and was trapped with 50 mW in the ROTs set up.
Mark Watson (60359)
core   +1 more source

Facile synthesis of vaterite fine powder CaCO3 from padalarang natural limestone with pH modifying via fine-bubble carbonation

Materials Research Express
Natural limestone, known for its high calcium carbonate (CaCO _3 ) content (∼95%) and safety in health applications, is widely used in science and industry. It exists in three forms: calcite, vaterite, and aragonite.
Renny Febrida, Sekar Diva Setyanagari, Revani Widjaya, Yanwar Faza, Ferry Faizal, I Made Joni   +5 more
doaj   +1 more source

Enhancing the Properties of PA6 and PA6/Ionomer Scraps Blend With CaCO3 Nanoparticles: Rheological, Mechanical, Thermal, and Morphological Evaluation

Polymer Engineering &Science, Volume 66, Issue 6, Page 4247-4260, June 2026.
ABSTRACT This study investigated the effects of incorporating ionomer scraps and CaCO3 nanoparticles on the rheological, mechanical, thermal, and morphological properties of neat polyamide 6 (PA6) and a PA6/ionomer scraps (80/20) blend. The ionomer formed an immiscible dispersed phase within the PA6, acting as an impact modifier; however, it reduced ...
Roberto Alves Taveira Jr., Patrícia Schmid Calvão, Adriana Martinelli Catelli Souza   +2 more
wiley   +1 more source

Prenucleation Species Dictate Foreign Ion Incorporation in the Biomineral Precursor Amorphous Calcium Carbonate

Advanced Functional Materials, Volume 36, Issue 36, 4 May 2026.
ACC forms via aggregating prenucleation clusters that gatekeep its chemical composition. Ion identity steers the path: Ba and Sr substitute Ca in clusters, thereby inhibiting nucleation, with a dose‐dependent switch of Sr to induction. Mg partitions into Mg‐rich and Mg‐poor clusters; the latter form ACC, expelling Mg.
Qianyu Zhao, Patrick Duchstein, Benedikt Demmert, Thi Q. Nhi Dao, Krishnaveni Anjala, Evelyn Gruber, Franziska Gröhn, Dirk Zahn, Dorrit E. Jacob, Stephan E. Wolf   +9 more
wiley   +1 more source

Reliable Estimation of Wavenumbers for Calcite Peaks

Journal of Raman Spectroscopy, Volume 57, Issue 5, Page 821-827, May 2026.
The wavenumbers of the calcite peaks were accurately estimated using a combination of a He–Ne laser and Ne emission lines. The values following the ± symbol represent the expanded uncertainties, corresponding to an approximate 95% confidence interval. ABSTRACT The Raman‐shift wavenumber ( ∆ν~), which is calculated as the difference between the absolute
Nobuyasu Itoh
wiley   +1 more source

Microbialite Diversity and Ocean Redox Geochemistry of the Late Tonian Callison Lake Formation

Geobiology, Volume 24, Issue 3, May/June 2026.
ABSTRACT Microbialites provide a unique insight into ancient microbial processes and environments, but trends in the diversity of unlaminated microbialites remain poorly understood. The ca. 745 Ma Callison Lake Formation in the Yukon (northwest Canada) features a range of microbialites which are diverse at both the mesoscale and microscale.
Charlotte Spruzen, Malcolm W. Wallace, Maxwell A. Lechte, Ashleigh V. S. Hood, Brennan O'Connell, Galen P. Halverson   +5 more
wiley   +1 more source

Applications of Vaterite in Drug Loading and Controlled Release

Shengwu huaxue yu shengwu wuli jinzhan
Currently, the drug delivery system (DDS) based on nanomaterials has become a hot interdisciplinary research topic. One of the core issues is drug loading and controlled release, in which the key lever is carriers.
SONG Xiao-Hui, PAN Ming-Yu, XU Jian-Feng, HUANG Zheng-Yu, PAN Qing, LI Qing-Ning   +5 more
doaj   +1 more source

Effect of the tryptone concentration on the calcium carbonate biomineralization mediated by Bacillus cereus

Dyna, 2018
Five tryptone concentrations (0.2%, 0.4%, 0.6%, 0.8% and 1.0%) were evaluated on calcium carbonate biomineralization processes, using 0.5% of calcium acetate.
Gerardo Andrés Caicedo-Pineda, María Consuelo Prada-Fonseca, Ana Elisa Casas-Botero, Hader Vladimir Martínez Tejada   +3 more
doaj   +1 more source

In Situ Raman Spectroscopy of a Silica Gel‐Templated Hydration Pathway in CO2‐Activated Cement

Journal of the American Ceramic Society, Volume 109, Issue 5, May 2026.
ABSTRACT This study investigates early‐age carbonate mineralization in cementitious systems using in situ Raman microspectroscopy. In the presence of dissolved CO2, clinker phases undergo accelerated dissolution, decomposing to form various calcium carbonate polymorphs and a transient amorphous silica gel network.
Marcin Hajduczek, Yogiraj Sargam, Sean Monkman, Vishnu Chaudhari, Santiago El Awad, Franz‐Josef Ulm, Admir Masic   +6 more
wiley   +1 more source