Browsing by Subject "Calcium"
Now showing items 1-9 of 9
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A sustainable approach to synthesize phosphonated chitosan using ball milling and its application for oilfield scale management
( Royal Society of Chemistry , 2022 , Article)For many years, the oil and gas industry has strived to develop environmentally friendly organophosphorus-based scale inhibitors. The natural polymer chitosan has recently gained significant importance for various upstream ... -
Decreased weight gain and enhanced serum biochemical parameters in rats after vitamin D and Ca supplementation
( Malaysian Journal of Nutrition , 2018 , Article)Introduction: Obese individuals tend to have lower plasma concentrations of calcidiol and higher levels of plasma parathyroid hormone (PTH). Objective of this study was to evaluate the influence of vitamin D and Ca ... -
Effect of self-healing calcium nitrate microcapsules on concrete properties
( National Research Council , 2016 , Article)Self-healing concrete with microencapsulated calcium nitrate was investigated. The compressive strength of concrete admixed with microcapsules (as a percentage of the weight of the cement) was tested and compared with that ... -
Hybrid coagulation-NF membrane processes for brackish water treatment: Effect of pH and salt/calcium concentration
( Elsevier B.V. , 2016 , Article)In order to reduce membrane fouling propensity, membrane technologies in water treatment and desalination processes have been coupled with coagulation process. However, the fouling issues still persisted. It is believed ... -
Microencapsulation of calcium nitrate for concrete applications
( National Research Council , 2016 , Article)The use of encapsulating healing agents that allow the self-healing of concrete has emerged as a potential solution to the current decay and costly maintenance of concrete infrastructure; however, many healing agents are ... -
Microstructure, thermal and mechanical response of AZ51/Al2O3 nanocomposite with 2 wt.% Ca addition
( Elsevier, Ltd , 2013 , Article)In the present study, new AZ51/Al2O3–2Ca magnesium nanocomposite was successfully synthesized by simultaneously adding 2wt.% aluminum, 2wt.% Ca and 1.5vol.% nanosized Al2O3 (50nm) into AZ31 matrix using a disintegrated ... -
Phosphonated Lower-Molecular-Weight Polyethyleneimines as Oilfield Scale Inhibitors: An Experimental and Theoretical Study
( American Chemical Society , 2022 , Article)For many years, amino methylenephosphonate (-CH2-N-PO3H2)-based scale inhibitors (SIs) have been deployed for preventing various scales in the oil and gas industry, particularly for squeeze treatment applications. However, ... -
The effect of vacancy defects on the adsorption of methane on calcite 104 surface
( Elsevier Editora Ltda , 2021 , Article)Density functional theory calculations are used to study the effect of vacancy defects (ionic Ca and charge neutral CO3) on the adsorption properties of CH4 molecule on different calcite surfaces. Both types of vacancy ... -
Use of dietary supplements among pregnant women in the center of Jordan
( Elsevier , 2020 , Article)Background: Balanced nutrition during pregnancy is necessary to meet the increasing demands of both maternal physiological changes and fetal growth. The present study aimed to investigate types of dietary supplements used ...