Results 31 to 40 of about 2,988,254 (363)

Regulation of intracellular cyclic GMP concentration by light and calcium in electropermeabilized rod photoreceptors. [PDF]

open access: yes, 1994
This study examines the regulation of cGMP by illumination and by calcium during signal transduction in vertebrate retinal photoreceptor cells. We employed an electropermeabilized rod outer segment (EP-ROS) preparation which permits perfusion of low ...
Coccia, V J, Cote, Rick H.
core   +2 more sources

Calcium Signalling: Calcium Goes Global [PDF]

open access: yesCurrent Biology, 2002
Recent evidence suggests that multiple calcium-releasing messengers might be activated simultaneously to regulate patterns of intracellular calcium signalling. In this way, agonists might use different messenger cocktails to encode specific signals and target selected processes.
Genazzani, Armando A., Thorn, Peter
openaire   +4 more sources

Titanium Dioxide Promotes the Growth and Aggregation of Calcium Phosphate and Monosodium Urate Mixed Crystals

open access: yesCrystals, 2023
The increased utilization of titanium dioxide (TiO2) nanoparticles (TNPs) in various industrial and consumer products has raised concerns regarding its harmful effect due to its accumulation within the different systems of the human body.
Onyebuchi C. Ukaeje   +1 more
doaj   +1 more source

Impact of calcium on salivary α-amylase activity, starch paste apparent viscosity and thickness perception [PDF]

open access: yes, 2011
Thickness perception of starch-thickened products during eating has been linked to starch viscosity and salivary amylase activity. Calcium is an essential cofactor for α-amylase and there is anecdotal evidence that adding extra calcium affects ...
A Kumari   +33 more
core   +1 more source

Study on Process Mineralogy of a High Iron Potassium Feldspar from Jilin Province

open access: yesKuangchan zonghe liyong, 2022
By means of X-ray diffraction analysis, scanning electron probe microanalysis and optical microscopy, the chemical composition and mineral intercalation and particle size composition of potassium feldspar in Jilin were studied. The results show that main
Jiao Peng   +4 more
doaj   +1 more source

Lack of direct evidence for a functional role of voltage-operated calcium channels in juxtaglomerular cells [PDF]

open access: yes, 1990
In this study we have examined the role of voltage-gated calcium channels in the regulation of calcium in juxtaglomerular cells. Using a combination of patch-clamp and single-cell calcium measurement we obtained evidence neither for voltage-operated ...
Chegini, S.   +3 more
core   +1 more source

Heterogeneous Phosphotungstate Catalyst Mediated Efficient Alcoholysis of Furfuryl Alcohol into Long-Chain Levulinates

open access: yesBioResources, 2023
The synthesis of alternative fuels from biomass has emerged to be a vital strategy to maintain sustainable development. Long-chain levulinate esters (LEs) are a class of good biofuel candidates because they have similar structures to biodiesels and ...
Yinghui Wang   +5 more
doaj   +2 more sources

Protein kinase A modulation of CaV1.4 calcium channels

open access: yesNature Communications, 2016
Phosphorylation of L-type calcium CaV channels by protein kinase A is essential for several physiological events. Here, the authors show how this kinase regulates CaV1.4 activity, suggesting a general regulatory mechanism for all L-type calcium channels.
Lingjie Sang, Ivy E. Dick, David T. Yue
doaj   +1 more source

Predicting calcium in grape must and base wine by FT-NIR spectroscopy [PDF]

open access: yes, 2018
Calcium content in sparkling wines may not exceed 80 mg/L due to the risk of aggregation with alginate capsules. The high calcium content usually found in wine and must emphasizes the need to develop alternative and appropriate techniques faster and ...
Barroso, João M.   +4 more
core   +1 more source

Calcitonin Gene-Related Peptide (Cgrp), Adrenomedullin (Am), Amylin, And Calcitonin (Ct) Receptors And Overlapping Biological Actions

open access: yesThe Scientific World Journal, 2001
CGRP, AM, amylin, and CT have in common N-terminal 6-7 amino acid ring structures linked by disulfide bridges and amidated C-termini required for biological activity.
J.A. Fischer, W. Born, R. Muff
doaj   +1 more source

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