Results 41 to 50 of about 21,174 (168)

Influence of Selected Saccharides on the Precipitation of Calcium-Vaterite Mixtures by the CO₂ Bubbling Method

Crystals, 2019
Calcium carbonate is a compound existing in living organisms and produced for many biomedical applications. In this work, calcium carbonate was synthesized by a CO2 bubbling method using ammonia as a CO2 absorption promotor.
Donata Konopacka-Łyskawa, Natalia Czaplicka, Barbara Kościelska, Marcin Łapiński, Jacek Gębicki   +4 more
doaj   +1 more source

Flotation Separation of Cassiterite from Calcite Using Low-Molecular-Weight Citrus Pectin as Depressant

Separations
This paper presents the development of an environmentally friendly, small molecular depressant citrus pectin for improving the recovery of cassiterite resources. Citrus pectin extracted from citrus peel was utilized as the depressant, and it demonstrated
Chenyang Yao, Yachao Li, Peng Li, Xiaokui Che, Guosheng Li, Fanfan Zhang, Weijun Peng, Bozeng Wu, Guixia Fan   +8 more
doaj   +1 more source

Exchangeable Al, peanut growth, and nodulation on Ultisol Bogor as affected by ameliorant proportion of lime and organic matter

Journal of Degraded and Mining Lands Management
Ultisols are characterized as acid soils with high exchangeable Al as the primary constraint for plant growth. This study aimed to investigate the effect of the proportion of lime and organic matter in decreasing exchangeable Al on Ultisol Bogor and ...
Vita Ratri Cahyani, Mohammad Iqbal Firmansyah, Ongko Cahyono, Hery Widijanto   +3 more
doaj   +1 more source

Effect of Grain Size and Mineral Mixing on Carbonate Absorption Features in the SWIR and TIR Wavelength Regions

Remote Sensing, 2012
Reflectance spectra of carbonate minerals in the shortwave infrared (SWIR) and thermal infrared (TIR) wavelength regions contain a number of diagnostic absorption features.
Nasrullah Zaini, Harald van der Werff, Freek van der Meer   +2 more
doaj   +1 more source

Using Element/Ca Response to Cleaning in Foraminifera From Endmember Depositional Environments to Infer Contaminants and Inform Pretreatment

Geochemistry, Geophysics, Geosystems
Past ocean conditions are often reconstructed using the elemental composition of foraminiferal calcite. However, foraminiferal remains are often impacted by post‐depositional contaminants; thus, they require cleaning prior to element/Ca (El/Ca) analysis.
Madelyn K. Cook, Ingrid L. Hendy
doaj   +1 more source

Adsorptive Desulfurization of Iraqi Light Naphtha Using Calcite and Modified Calcite

Iraqi Journal of Chemical and Petroleum Engineering
This study used the adsorption method to remove sulfur compounds from light naphtha fuel by using calcite and modified calcite as adsorbents. The calcite was prepared from chicken eggshells by heating and activation methods. It was modified by mixing it
Ahmed Qasim, Hameed Hussein Alwan
doaj   +1 more source

Mineral Composition of Skeletal Elements in Dorid Nudibranchia Onchidoris muricata (Gastropoda, Mollusca)

Biomimetics
Energy-dispersive X-ray spectrometry (EDX), a standard technique in mineralogy and criminalistics, has not yet been fully incorporated into the study of various biomineral structures of invertebrates, despite the growing popularity of this topic in the ...
Dmitry A. Ozerov, Ekaterina D. Nikitenko, Alexey A. Piryazev, Andrey I. Lavrov, Elena V. Vortsepneva   +4 more
doaj   +1 more source

Phase quantification using deep neural network processing of XRD patterns

IUCrJ
Mineral identification and quantification are key to the understanding and, hence, the capacity to predict material properties. The method of choice for mineral quantification is powder X-ray diffraction (XRD), generally using a Rietveld refinement ...
Titouan Simonnet, Sylvain Grangeon, Francis Claret, Nicolas Maubec, Mame Diarra Fall, Rachid Harba, Bruno Galerne   +6 more
doaj   +1 more source

Alkalinity control in sludge propels the conversion of concrete slurry waste into micro- and nano-sized biogenic CaCO3

Water Science and Technology
The utilization of Bacillus sp. for the production of bio-CaCO3 in concrete crack repair and strength enhancement has attracted considerable attention.
Jinbo Zhao, Jiacheng Feng, Yifan Du, Zhiyang Yan, Xiaoguang Li, Jinyi Qin, Ming Su, Min Yang   +7 more
doaj   +1 more source

Comparative Assessment of Shell Structural, Mechanical, and Elemental Properties in Adult Acorn Barnacles

Diversity
Balanomorph (acorn) barnacles are found throughout the world’s coastal oceans, and their success is dependent on a hard, mineralized, outer shell. Although macro-scale morphology of barnacle shells has been studied extensively, relatively little is known
Jazmine Shaw, Yeram Kang, Callie Triano, Corin J. Hoppe, Nick Aldred, Rebecca A. Metzler, Gary H. Dickinson   +6 more
doaj   +1 more source