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25 results for “Membrane composition”
Text-fig. 9. Tachyglossus aculeatus. Transverse section through the orbital region of the head of a juvenile specimen. ms: sphenobturatory membrane; plb: palatine bone; psw: primary endocranial sidewall; sll: secondary lateral lamella of Kuhn (1971); this endocranial process (blue) is here interpreted as a derivative of the cartilago teniformis. (From Kuhn and Zeller 1987.) in Cartilago Teniformis And Its Derivatives: Additional Information On The Basic Composition And Evolution Of The Skull
Text-fig. 9. Tachyglossus aculeatus. Transverse section through the orbital region of the head of a juvenile specimen. ms: sphenobturatory membrane; plb: palatine bone; psw: primary endocranial sidewall; sll: secondary lateral lamella of Kuhn (1971); this endocranial process (blue) is here interpreted as a derivative of the cartilago teniformis. (From Kuhn and Zeller 1987.)
Text-fig. 8. Tachyglossus aculeatus. Transverse section through the temporal region of the adult head. Membranous parts blue, autostoses brown and allostoses purple. gg: ganglion gasseri; lop: lamina obturatoria periotici; ms: sphenobturatory membrane; mt: musculus temporalis; oo: os obturans; opa: parietal bone. (Modified from Kuhn and Zeller 1987.) in Cartilago Teniformis And Its Derivatives: Additional Information On The Basic Composition And Evolution Of The Skull
Text-fig. 8. Tachyglossus aculeatus. Transverse section through the temporal region of the adult head. Membranous parts blue, autostoses brown and allostoses purple. gg: ganglion gasseri; lop: lamina obturatoria periotici; ms: sphenobturatory membrane; mt: musculus temporalis; oo: os obturans; opa: parietal bone. (Modified from Kuhn and Zeller 1987.)
Project files provided as supporting information to the manuscript "Membrane binding of pore-forming gamma-hemolysin components studied at different lipid compositions"
<p><strong>Project files provided as supporting information to the manuscript "Membrane binding of pore-forming gamma-hemolysin components studied at different lipid compositions"</strong></p> <p>The dataset contains the following folders:</p> <p>- number_of_contacts: files with the number of contacts between the rim domains of LukF and Hlg2 and the membrane, for different bilayer compositions (Fig. 2).</p> <p>- binding_events: files with the duration of the time interavals in which LukF and Hlg2 are bound to the membrane, and the scripts used to compute for each system the number of binding/unbinding events and the average membrane residence time (Fig. 3).</p> <p>- electrostatic_potential: files of the surface electrostatic potential produced with the adaptive Poisson-Boltzmann solver and used for visualization with Chimera (Fig. 4).</p> <p>- angles: files with the angle values computed between the protein axis and the z-axis of the simulation box (Fig. 5).</p> <p>- contacts_per_residue: files with the number of frames in which each protein residue is in contact with the membrane, with respect to the total number of frames in which the rim domain interacts with the bilayer (Fig. 5).</p> <p>- distance_protein_membrane: files with the minimum distance between the protein and the membrane (Fig. 6).</p> <p>- binding_sites: file produced by PyLipid with relevant information on the main DOPC binding sites identified in LukF.</p> <p>- min_distance_per_residue: files with the minimum distance between each protein residue and the membrane, computed at the binding steps (Fig. S5).</p>
Data from: Mitochondrial membranes in cardiac muscle from Antarctic notothenioid fishes vary in phospholipid composition and membrane fluidity
Antarctic notothenioid fishes are highly stenothermal, yet their tolerance for warming is species-dependent. Because a body of literature points to the loss of cardiac function as underlying thermal limits in ectothermic animals, we investigated potential relationships among properties of ventricular mitochondrial membranes in notothenioids with known differences in both cardiac mitochondrial metabolism and organismal thermal tolerance. Fluidity of mitochondrial membranes was quantified by fluorescence depolarization for the white-blooded Chaenocephalus aceratus and the red-blooded Notothenia coriiceps. In these same membranes, lipid compositions and products of lipid peroxidation, the latter of which can disrupt membrane order, were analyzed in both species and in a second icefish, Pseudochaenichthys georgianus. Mitochondrial membranes from C. aceratus were significantly more fluid than those of the more thermotolerant species N. coriiceps (P < .0001). Consistent with this, ratios of total phosphatidylethanolamine (PE) to total phosphatidylcholine (PC) were lower in membranes from both species of icefishes, compared to those of N. coriiceps (P < .05). However, membranes of N. coriiceps displayed a greater unsaturation index (P < .0001). No differences among species were found in membrane products of lipid peroxidation. With rising temperatures, greater contents of PC in mitochondrial membranes from ventricles of icefishes are likely to promote membrane hyperfluidization at a lower temperature than for cardiac mitochondrial membranes from the red-blooded notothenioid. We propose that physical and chemical properties of the mitochondrial membranes may contribute to some of the observed differences in thermal sensitivity of physiological function among these species.
Data for: Separation of oil vapor by polyether block amide composite membrane modified with porous materials
<p>The ability of membranes to separate oil vapor is affected by their permeance and selectivity. This study modifies polyether block amide (PEBA) composite membranes with a microporous zeolite, Silicalite-1, or a mesoporous zeolite, MCM-41. The results show that when PEBA composite membranes are modified with these zeolites, the selective layer of the composite membrane is coated more thinly, resulting in a higher flux of organic gas. Silicalite-1 increases the hydrophobicity of the membrane, which facilitates the adsorption of organic vapor on the membrane surface, thus improving the membrane selectivity. In the separation of oil vapor, both modified membranes can effectively increase the gas permeabilities and selectivities. The main mechanism governing gas transport in the MCM-41-modified membrane is Knudsen diffusion, so the selectivity for small molecules is improved more significantly. By contrast, the dissolution–diffusion mechanism is dominant in the Silicalite-1-modified membranes, which considerably increases the selectivity for large molecules.</p>
Data from: The cutaneous lipid composition of bat wing and tail membranes: a case of convergent evolution with birds
The water vapour permeability barrier of mammals and birds resides in the stratum corneum (SC), the outermost layer of the epidermis. The molar ratio and molecular arrangement of lipid classes in the SC determine the integrity of this barrier. Increased chain length and polarity of ceramides, the most abundant lipid class in mammalian SC, contribute to tighter packing and thus to reduced cutaneous evaporative water loss (CEWL). However, tighter lipid packing also causes low SC hydration, making it brittle, whereas high hydration softens the skin at the cost of increasing CEWL. Cerebrosides are not present in the mammalian SC; their pathological accumulation occurs in Gaucher's disease, which leads to a dramatic increase in CEWL. However, cerebrosides occur normally in the SC of birds. We tested the hypothesis that cerebrosides are also present in the SC of bats, because they are probably necessary to confer pliability to the skin, a quality needed for flight. We examined the SC lipid composition of four sympatric bat species and found that, as in birds, their SC has substantial cerebroside contents, not associated with a pathological state, indicating convergent evolution between bats and birds.
The Effect of Omega-3 Fatty Acid Supplementation on Skeletal Muscle Membrane Composition and Cellular Metabolism
ClinicalTrials.gov study NCT01732003. IPD Sharing: Not stated. Countries: 1. Publications: 6.
Data from: The cutaneous lipid composition of bat wing and tail membranes: a case of convergent evolution with birds
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Data for: Separation of oil vapor by polyether block amide composite membrane modified with porous materials
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Data from: Mitochondrial membranes in cardiac muscle from Antarctic notothenioid fishes vary in phospholipid composition and membrane fluidity
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Composite amine mixed matrix membranes for highpressure CO2-CH4 separation: synthesis, characterization and performance evaluation
<p>The key challenge in composite mixed matrix membrane (MMMs) synthesis is the incompatible membrane fabrication using porous support in the dry-wet phase inversion technique. The key objective of this research to synthesis thin composite ternary (amine) mixed matrix membranes on microporous support by incorporating 10 wt. % of carbon molecular sieve (CMS) and 5-15 wt. % of diethanolamine (DEA) in polyethersulfone (PES) dope solution for the separation of carbon dioxide (CO<sub>2</sub>) from methane (CH<sub>4</sub>). The developed membranes were evaluated for their morphological structure, thermal and mechanical stabilities, functional groups, as well as the CO<sub>2</sub>-CH<sub>4</sub> separation performance at high pressure (10-30 bar). The results showed that the developed membranes have asymmetric structure, and mechanically strong at 30 bar. A new class of PES/CMS/DEA composite MMMs exhibited improved gas permeance compared to pure PES composite polymeric membrane. The permselectivty of CO<sub>2</sub>/CH<sub>4</sub> enhanced from 8.15 to 16.04 at 15 wt.% of DEA at 30 bar pressure. The performance of amine composite MMMs is theoretically predicted using a modified Maxwell model. The predictions were in good agreement with experimental data after applying the optimized values with AARE % = ~ less 2 % and R<sup>2</sup> = 0.99.</p>
Impact of chronic psychological stress on platelet membrane fatty acid composition in type 1 diabetes mellitus
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Data from: Adsorption of heavy metal with modified eggshell membrane and in situ synthesis of Cu-Ag/MESM composites
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Composite amine mixed matrix membranes for highpressure CO2-CH4 separation: synthesis, characterization and performance evaluation
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The conserved WhiA protein influences the fatty acid composition of the Bacillus subtilis cell membrane
GEO Series GSE121479. Bacillus subtilis. 6 samples. Type: Expression profiling by high throughput sequencing.
Changes in membrane lipid composition during Iron depletion and starvation in Chlamydomonas reinhardtii
GEO Series GSE44611. Chlamydomonas reinhardtii. 9 samples. Type: Expression profiling by high throughput sequencing.
Composite Plug Vs D-PTFE Membrane in Socket Preservation
ClinicalTrials.gov study NCT06315413. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Effect of EPA-DHA Supplement, Life Style Modification Standard Treatment on Clinical Outcome Lipid Membrane Composition in Type 2 Diabetes
ClinicalTrials.gov study NCT02705430. IPD Sharing: NO. Countries: 1. Publications: 0.
Fish Oil Supplementation, Resting Energy Expenditure, Skeletal Muscle Membrane Composition and Metabolism in Elderly Subjects.
ClinicalTrials.gov study NCT02338401. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Assessment of Bone Gain Following Composite Graft Rehabilitation of Horizontal Maxilla Atrophy With Sausage Technique Utilizing (Pericardial) Collagen Membrane
ClinicalTrials.gov study NCT06831214. IPD Sharing: NO. Countries: 1. Publications: 0.
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