Results 21 to 30 of about 2,440,422 (308)

A Novel Calcium-Activated Potassium Channel Controls Membrane Potential and Intracellular pH in Trypanosoma cruzi

open access: yesFrontiers in Cellular and Infection Microbiology, 2020
Trypanosoma cruzi develops in environments where nutrient availability, osmolarity, ionic concentrations, and pH undergo significant changes. The ability to adapt and respond to such conditions determines the survival and successful transmission of T ...
Patricia Barrera   +4 more
doaj   +1 more source

Calcium Signaling in Plant-Insect Interactions

open access: yesPlants, 2022
In plant–insect interactions, calcium (Ca2+) variations are among the earliest events associated with the plant perception of biotic stress. Upon herbivory, Ca2+ waves travel long distances to transmit and convert the local signal to a systemic defense ...
Ambra S. Parmagnani, Massimo E. Maffei
doaj   +1 more source

Ling’s Adsorption Theory as a Mechanism of Membrane Potential Generation Observed in Both Living and Nonliving Systems

open access: yesMembranes, 2016
The potential between two electrolytic solutions separated by a membrane impermeable to ions was measured and the generation mechanism of potential measured was investigated.
Hirohisa Tamagawa   +2 more
doaj   +1 more source

Membrane Potential Assessment by Fluorimetry as a Predictor Tool of Human Sperm Fertilizing Capacity

open access: yesFrontiers in Cell and Developmental Biology, 2020
Mammalian sperm acquire the ability to fertilize eggs by undergoing a process known as capacitation. Capacitation is triggered as the sperm travels through the female reproductive tract.
Carolina Baro Graf   +8 more
doaj   +1 more source

Anoxic spreading depolarization in the neonatal rat cortex in vitro

open access: yesFrontiers in Cellular Neuroscience, 2023
Anoxic spreading depolarization (aSD) is a hallmark of ischemic injury in the cerebral cortex. In adults, aSD is associated with rapid and nearly complete neuronal depolarization and loss of neuronal functions.
Azat Gainutdinov   +5 more
doaj   +1 more source

ASCs-Exosomes Recover Coupling Efficiency and Mitochondrial Membrane Potential in an in vitro Model of ALS

open access: yesFrontiers in Neuroscience, 2019
The amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder characterized by motoneurons death. Mutations in the superoxide dismutase 1 (SOD1) protein have been identified to be related to the disease.
Elisa Calabria   +9 more
doaj   +1 more source

Evaluation of the Anticancer Properties of Geranyl Isovalerate, an Active Ingredient of Argyreia nervosa Extract in Colorectal Cancer Cells

open access: yesFrontiers in Pharmacology, 2021
Chemotherapy is a general treatment procedure for cancer. The diversity in cancer incidence and the failure of therapy due to chemoresistance lead to increased cancer-related deaths.
Fayyaz Rasool   +4 more
doaj   +1 more source

MEMBRANE POTENTIALS AND CATAPHORETIC POTENTIALS OF PROTEINS [PDF]

open access: yesJournal of General Physiology, 1923
1. It has been shown in preceding publications that the membrane potentials of protein solutions or gels are determined by differences in the concentration of a common ion (e.g. hydrogen ion) inside a protein solution or protein gel and an outside aqueous solution free from protein, and that the membrane potentials can be calculated with a good degree ...
openaire   +2 more sources

Neural coding with graded membrane potential changes and spikes

open access: yes, 2001
Kretzberg J, Warzecha A-K, Egelhaaf M. Neural coding with graded membrane potential changes and spikes. Journal of computational neuroscience. 2001;11(2):153-164.The neural encoding of sensory stimuli is usually investigated for spike responses, although
Egelhaaf, Martin ; https://orcid.org/   +2 more
core   +1 more source

Determination of a Robust Assay for Human Sperm Membrane Potential Analysis

open access: yesFrontiers in Cell and Developmental Biology, 2019
Mammalian sperm must undergo a complex process called capacitation in order to fertilize the egg. During this process, hyperpolarization of the sperm plasma membrane has been mostly studied in mouse, and associated to its importance in the preparation to
Carolina Baro Graf   +7 more
doaj   +1 more source

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