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نتایج جستجو برای DPPC

تعداد نتایج: 802  
Journal: :Langmuir : the ACS journal of surfaces and colloids 2013
Raquel Orozco-Alcaraz, Tonya L Kuhl,

The surface force apparatus (SFA) was utilized to obtain force-distance profiles between silica-supported membranes formed by Langmuir-Blodgett deposition of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC). In the absence of a membrane, a long-range electrostatic repulsion and short-range steric repulsion are measured as a result of the deprotonation of silica in water and the roughness of t...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 1986
W Lohmann, B Kiefer, W Schmehl,

1H NMR studies on DPPC vesicles labeled with the spin labels (1,14) or (12,3) have shown that both of the spin labels influence the fatty acid side chains as well as the choline head groups. The spin label (12,3) affects, naturally, the head groups stronger than the spin label (1,14), while the reversed effect can be observed at the side chains. This effect progresses with time after vesicle pr...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2007
Kandice L Harper, Heather C Allen,

Vibrational sum frequency generation spectroscopy is used to study the interactions of the charged soluble organic surfactant sodium dodecyl sulfate (SDS) with an insoluble 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) monolayer at the air-aqueous interface. Results indicate that the surfactant species compete for surface sites in the mixed system, with a lower monolayer number density of ...

1996
K. J. KLOPFER, T. K. VANDERLICK,

Valuable as they are, isotherms may display features that Pressure–area isotherms of dipalmitoylphosphatidylcholine are difficult to interpret, or may even be featureless under (DPPC) exhibit a two-phase region wherein domains of a liquidconditions where interesting things are happening. For examcondensed (LC) phase are dispersed in the less ordered liquidple, the nonhorizontal nature of the pl...

Journal: :American journal of physiology. Lung cellular and molecular physiology 2001
A B Fisher, C Dodia,

This study evaluated the role of a lysosomal-type phospholipase A2 (aiPLA(2)) in the degradation of internalized dipalmitoylphosphatidylcholine (DPPC) and in phospholipid synthesis by the rat lung. Uptake and degradation of DPPC were measured in isolated perfused rat lungs over 3 h following endotracheal instillation of [(3)H]DPPC in mixed unilamellar liposomes plus or minus MJ33, a specific in...

Journal: :Biophysical journal 2006
Benjamin L Stottrup, Sarah L Keller,

We investigate the miscibility phase behavior of lipid monolayers containing a wide variety of sterols. Six of the sterols satisfy a definition from an earlier study of "membrane-active sterols" in bilayers (cholesterol, epicholesterol, lathosterol, dihydrocholesterol, ergosterol, and desmosterol), and six do not (25-hydroxycholesterol, lanosterol, androstenolone, coprostanol, cholestane, and c...

2015
B. B. Kheyfets, S. I. Mukhin,

Area per molecule in a DPPC-Cholesterol bilayers depends non-linearly on the cholesterol concentration. Using flexible strings model of lipid membranes we calculate area per molecule in DPPC-Cholesterol mixtures in the biologically relevant concentrations range. Few parameters of the model are optimized for a perfect agreement with the area per lipid data available from molecular dynamics simul...

Journal: :Biophysical journal 1999
A M Smondyrev, M L Berkowitz,

We performed molecular dynamics simulations on dipalmitoylphosphatidylcholine (DPPC)/dimethylsulfoxide (DMSO) system that has the same lipid:solvent weight ratio as in our previous simulation done on DPPC/water. We did not observe a large change in the size of DPPC membrane when the solvent was changed from water to DMSO. Also, we did not observe that a large number of DMSO molecules is permeat...

Journal: :The journal of physical chemistry. B 2016
Neha Shafique, Kiley E Kennedy, Jack F Douglas, Francis W Starr,

Heterogeneity of dynamics plays a vital role in membrane function, but the methods for quantifying this heterogeneity are still being developed. Here we examine membrane dynamical heterogeneity via molecular simulations of a single-component dipalmitoylphosphatidylcholine (DPPC) lipid bilayer using the MARTINI force field. We draw upon well-established analysis methods developed in the study of...

2016
Aleksandra Szcześ,

After an hour contact with a phospholipase A2 (PLA2) solution, only the outer leaflet of the dipalmitoylphosphatidylcholine (DPPC) bilayers supported on mica surface underwent hydrolysis whose products, i.e., palmitic acid and lysophospholipid, accumulated on the bilayer surface. Only calcite was present on the bare mica and enzymatically unmodified and modified supported DPPC bilayers soaked f...