Magnesium, incorporated in foraminiferal calcite (Mg/Ca), is used intensively to reconstruct past seawater temperatures but, in addition to temperature, the Mg/Ca of foraminiferal tests also depends on the ratio of Mg and Ca in seawater (Mg/Ca). The physiological mechanisms responsible for these proxy relationships are still unknown. This culture study investigates the impact of different seawater [Mg] on calcification in two benthic foraminiferal species precipitating contrasting Mg/Ca: , producing low-Mg calcite and , producing intermediate-Mg calcite. Foraminiferal growth and test thickness were determined and, Mg/Ca was analyzed using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS). Results show that at present-day seawater Mg/Ca of ~ 5, both species have highest growth rates, reflecting their adaptation to modern seawater element concentrations. Test thickness is not significantly affected by different Mg/Ca. The relationship between Mg/Ca and Mg/Ca shows a distinct positive y-axis intercept, possibly reflecting at least two processes involved in foraminiferal biomineralization. The associated Mg partition (D) changes non-linearly with increasing Mg/Ca, hence suggesting that the D is best described by an exponential function approaching an asymptote.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4459688 | PMC |
| http://dx.doi.org/10.1016/j.marmicro.2014.09.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Serum magnesium, not calcium, is inversely associated with abnormal HbA1c concentrations in adults with coronary artery disease.
Asia Pac J Clin Nutr
February 2025
Image Center, Wuhan Asia Heart Hospital, Hubei, China. Email:
Background And Objectives: Mechanism studies have indicated that magnesium (Mg) and calcium (Ca) have important biological functions in glucose regulation, but epidemiological data on their associations with glycosylated hemoglobin (HbA1c) are sparse. We aimed to explore the associations of Mg and Ca with abnormal HbA1c, and examine the mediating effects of inflammation in coronary artery disease (CAD) Chinese adults.
Methods And Study Design: A hospital-based cross-sectional study of 11934 patients with CAD was conducted.
Manipulating Mg/Ca ratios in MgO-CaO-SiO bioactive glass for achieving accelerated osteogenic differentiation of human adipose-derived stem cells.
Biomater Adv
January 2025
International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices, Ming Chi University of Technology, New Taipei City 24301, Taiwan; Department of Mechanical Engineering, Chang Gung University, Taoyuan City 33302, Taiwan; Research Center for Intelligent Medical Devices, Ming Chi University of Technology, New Taipei City 24301, Taiwan. Electronic address:
Cell-containing biomaterial is a promising material for treating nonunion or critical bone defect. Human adipose-derived stem cells (hADSCs) are suitable for bone repair due to their abundance in the abdomen, thighs, and buttocks. However, the low osteogenic capacities of hADSCs hinder their extended development for bone regeneration application.
View Article and Find Full Text PDFCoffee is a popular beverage with significant commercial and social importance. The study aimed to determine the fatty acids profile, volatile compounds, and concentration of major and trace elements (Na, Mg, K, Ca, P, S, Fe, Mn, Cu, Zn, Cr, Ni, Cd, and Pb) in the two most important varieties of coffee, namely arabica and robusta. The leaching percentages of mineral elements and the effect of boiling time on the transfer of elements to aqueous extracts were also determined.
View Article and Find Full Text PDFMonitoring the Concentrations of Na, Mg, Ca, Cu, Fe, and K in at Different Growth Stages by NIR Spectroscopy Coupled with Chemometrics.
Foods
January 2025
Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China.
, an edible seaweed, plays a crucial role in our daily lives by providing essential nutrients, including minerals, to the human body. The detection of mineral content during different growth stages of benefits the goals of ensuring product quality, meeting diverse consumer needs, and achieving quality classification. Currently, the determination of minerals in primarily relies on inductively coupled plasma mass spectrometry and other methods, which are time-consuming and labor-intensive.
View Article and Find Full Text PDFOtolith chemistry suggests population heterogeneity within a genetically homogeneous Indian scad population along Indian coast.
Sci Rep
January 2025
Marine Biotechnology Fish Nutrition and Health Division, ICAR-Central Marine Fisheries Research Institute, Ernakulam North P O, Kochi, Kerala, 682018, India.
The Indian scad, Decapterus russelli is one of the most exploited pelagic resources of India. Population genetic analyses using mitochondrial and nuclear markers indicated a lack of genetic structuring among populations from Indian waters. As this species is highly migratory, it is also important to establish the environmental influence on its population structure.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!