Results 341 to 350 of about 15,661,277 (406)
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Cell Membranes and Morphogenesis
Nature, 1956CELL membranes can be readily visualized in the electron microscope; but a rather special cell system is needed if one wishes to study their supposed role1,2 in morphogenesis. In the hair follicle we have been able to examine at high resolution a system which fulfils most of the electron microscopist's demands.
M S, BIRBECK, E H, MERCER
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Astrobiology, 2002
Organic compounds are synthesized in the interstellar medium and can be delivered to planetary surfaces such as the early Earth, where they mix with endogenous species. Some of these compounds are amphiphilic, having polar and nonpolar groups on the same molecule.
David, Deamer +4 more
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Organic compounds are synthesized in the interstellar medium and can be delivered to planetary surfaces such as the early Earth, where they mix with endogenous species. Some of these compounds are amphiphilic, having polar and nonpolar groups on the same molecule.
David, Deamer +4 more
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Cell Membranes in Cytotoxicity
1977Silica particles are cytotoxic for macrophages because they damage the membranes around secondary lysosomes in which the particles are engulfed. Hydroxyl groups of silicic acid on the surface of the particles form hydrogen bonds with phosphate ester groups of phospholipids and disrupt a variety of natural and artificial membranes.
A C, Allison, J, Ferluga
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The American Journal of the Medical Sciences, 1988
Several alterations in membrane transport systems are observed in rat and human hypertension. Na+ flux changes are numerous, and cellular homeostasis to Na+ loading is impaired. Transmembrane Ca2+ movements are also numerous but clearly defined by a reduction in Ca2+ binders, a hypersensitivity of membrane phospholipase C, possible increased Ca2+ leak ...
P, Meyer, P, Marche
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Several alterations in membrane transport systems are observed in rat and human hypertension. Na+ flux changes are numerous, and cellular homeostasis to Na+ loading is impaired. Transmembrane Ca2+ movements are also numerous but clearly defined by a reduction in Ca2+ binders, a hypersensitivity of membrane phospholipase C, possible increased Ca2+ leak ...
P, Meyer, P, Marche
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Ligand-Modified Cell Membrane Enables the Targeted Delivery of Drug Nanocrystals to Glioma.
ACS Nano, 2019The safe and efficient delivery of chemotherapeutic agents remains critical to anticancer therapy. Herein, we report on a targeted drug delivery system based upon a modified cell membrane coating technique and drug nanocrystals (NCs).
Zhilan Chai +14 more
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Physical Review E, 1995
The other equation of the set resembles an equation derived from the Nernst-Planck equation, which describes transmembrane ion transport and hence provides a mechanism for transmembrane potential variation. A more complete calculation of the velocity of the asymptotic wave form shows a lower wave speed than the estimate of Nagumo {ital et} {ital al ...
, Das, , Schwarz
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The other equation of the set resembles an equation derived from the Nernst-Planck equation, which describes transmembrane ion transport and hence provides a mechanism for transmembrane potential variation. A more complete calculation of the velocity of the asymptotic wave form shows a lower wave speed than the estimate of Nagumo {ital et} {ital al ...
, Das, , Schwarz
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Electropermeabilization of the Cell Membrane
2014Membrane electropermeabilization is the observation that the permeability of a cell membrane can be transiently increased when a micro-millisecond external electric field pulse is applied on a cell suspension or on a tissue. Applicative aspects for the transfer of foreign molecules (macromolecules) into the cytoplasm are routinely used.
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Cholesterol and the cell membrane
Biochimica et Biophysica Acta (BBA) - Reviews on Biomembranes, 1985Recent studies concerning cholesterol, its behavior and its roles in cell growth provide important new clues to the role of this fascinating molecule in normal and pathological states.
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Permeabilization of Cell Membranes
2009In order to detect intracellular antigens, cells must first be permeabilized especially after fixation with cross-linking agents such as formaldehyde and glutaraldehyde. Permeabilization provides access to intracellular or intraorganellar antigens. Two general types of reagents are commonly used: organic solvents, such as methanol and acetone, and ...
Maria Célia, Jamur, Constance, Oliver
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Annual Review of Physiology, 1983
"The calcium ion has an unusual importance in biological phenomena, and the literature concerning its effects is extremely voluminous." That this statement, written more than 30 years ago (1), also describes the situation today was certainly expected if not anticipated by L. V.
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"The calcium ion has an unusual importance in biological phenomena, and the literature concerning its effects is extremely voluminous." That this statement, written more than 30 years ago (1), also describes the situation today was certainly expected if not anticipated by L. V.
openaire +1 more source