Results 21 to 30 of about 2,412,067 (294)

SOLVING HEAT ENGINEERING PROBLEMS USING THE FINITE ELEMENT METHOD

open access: yesArchitecture and Engineering, 2021
Introduction: In the course of the study, we examined energy-efficient and environmentally friendly heat-insulating materials based on gypsum and gypsum-containing primary components.
Lubov Anikanova   +3 more
doaj   +1 more source

Isfahan general dentist's awareness, attitude, and performance regarding prescription of new caries prevention materials containing calcium and fluoride components

open access: yesJournal of Education and Health Promotion, 2023
BACKGROUND: Fluoride Ion can cause remineralization of primary caries lesions in the presence of calcium and phosphate. New compounds of calcium-containing casein phosphopeptides-amorphous calcium phosphate (CPP-ACP), make the remineralization more ...
Firouzeh Nilchian   +2 more
doaj   +1 more source

Interactions between stearic acid and calcite surfaces: Experimental and computer simulation studies

open access: yesBiosurface and Biotribology, 2021
Calcite surface was modified with stearic acids, and the interaction between them was investigated both experimentally and theoretically. Stearic‐acid‐modified calcite powders were investigated with Fourier transform infrared spectroscopy, X‐ray ...
Lihua Zhang   +5 more
doaj   +1 more source

LEACHING THERMODYNAMICS AND KINETICS OF OIL SHALE WASTE KEY COMPONENTS; pp. 80–99 [PDF]

open access: yesOil Shale, 2016
Estonia is strongly dependent on locally mined oil shale which is the main fuel for power and oil production. Vast amounts of solid wastes are formed from circulating fluidized bed (CFB), pulverized firing (PF), and solid heat carrier (SHC) technologies,
KADRIANN TAMM   +5 more
doaj   +1 more source

Electron-Beam Radiation Effects in Multilayer Structures Grown with the Periodical Deposition of Si and CaF2 on Si(111)

open access: yesMaterials Proceedings, 2023
The formation of CaSi2 films on Si(111) with the molecular-beam epitaxy (MBE) of CaF2 under fast electron-beam irradiation was investigated. The method of a high-planarity CaSi2 film synthesis assisted by electron-beam irradiation was developed.
Anatoly V. Dvurechenskii   +6 more
doaj   +1 more source

Pengaruh Metode Hidrolisis Terhadap Karakteristik Kimia Senyawa Kalsium Hasil Ekstraksi dari Cangkang Telur Ayam

open access: yesKovalen: Jurnal Riset Kimia, 2022
Preparation of calcium compounds such as calcium hydroxide, calcium carbonate, and calcium oxide from chicken eggshells can be done through conventional methods that are cheaper and more practical, such as the sol-gel hydrolysis method and the ...
Yurikke Julieta Permata Putri Sunarya   +3 more
doaj   +1 more source

Spectroscopic and X-ray structural investigations of the active calcium preparation [PDF]

open access: yesE3S Web of Conferences, 2023
Structural studies of calcium citrate obtained by IR irradiation of calcium carbonate and citric acid in various ratios by spectroscopic and X-ray structural analysis has been carried out.
Sadikova Nargiza   +4 more
doaj   +1 more source

Nanoparticulate hydroxyapatite and calcium-based CO2 sorbents [PDF]

open access: yes, 2012
This thesis is focused on the development of synthesis and characterisation protocols for two different nanoparticulate materials; hydroxyapatite (HA), a biomaterial well recognised as chemically akin to human bone, and CaO, a material often used for the
Bilton, Matthew William
core   +6 more sources

Calcium Carbonate Suppresses Haem Toxicity Markers without Calcium Phosphate Side Effect on Colon Carcinogenesis [PDF]

open access: yes, 2010
Red meat intake is associated with increased risk of colorectal cancer. We have previously shown that haemin, haemoglobin and red meat promote carcinogen-induced preneoplastic lesions, aberrant crypt foci, in the colon of rats.
Diane Bahuaud   +13 more
core   +1 more source

Beef meat promotion of dimethylhydrazine-induced colorectal carcinogenesis biomarkers is suppressed by dietary calcium [PDF]

open access: yes, 2007
Red meat consumption is associated with increased risk of colorectal cancer. We have previously shown that haemin, Hb and red meat promote carcinogen-induced preneoplastic lesions: aberrant crypt foci (ACF) and mucin-depleted foci (MDF) in rats.
Santarelli, Raphaëlle, L.   +6 more
core   +1 more source

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