• Bulletin of the Korean Chemical Society
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• v.11 no.3
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• pp.238-240
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• 1990

$^{31}P${$^1H$} nuclear Overhauser effects (NOEs) have been obtained for complexes formed between apolipoprotein B (apo B) and dipalmytoylphosphatidylcholine (DPPC) vesicles. NOE measurements have been conducted with broad-band irradiation of the entire $^1H$ spectrum in order to identify the proton source of the NOE. In a unilamellar vesicle formed spontaneously upon mixing aqueous suspensions of long-chain phospholipid with small amount of short-chain lecithin, the maximum NOE occurs at the N-methyl proton resonance position of the choline moiety. With addition of cholesterol to vesicles, the position of the NOE maximum shifts further away from the choline methyl frequency. For the ternary apo B-vesicle-cholesterol complex, the position of the maximum NOE lies halfway between those in vesicles with and without cholesterol.

• Bulletin of the Korean Chemical Society
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• v.5 no.4
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• pp.154-158
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• 1984

In order to characterize the permeability of small unilamellar vesicles (SUV), efflux of 6-carboxyfluorescein (6-CF) from the vesicles was monitored spectrophotofluorometrically. Since the entrapped highly quenched 6-CF (200 mM) became fluorescent upon release from the vesicles, the 6-CF could be used as an efflux probe. SUV containing entrapped 6-CF was prepared from egg phosphatidylcholine and separated by gel filtration on Sepharose 4B. Observed change of relative fluorescent intensity with time was sigmoidal. From this curve, the parameter of permeability was determined either by half-time or a released amount per unit time from the initial slope. Half-time of efflux of prepared SUV having 302 ng phospholipid/ml in 10 mM Tris-HCl buffer pH 7.4 was 21.0 min at $37{\circ}C$. Various factors which could affect the half-time were examined including temperature, pH, salt, and vesicle concentration. In particular the effect of vesicle concentration on the efflux revealed that the permeability can be a function of the concentration.

• Textile Coloration and Finishing
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• v.33 no.4
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• pp.338-347
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• 2021

In the case of occlusive dressings currently used in dressings for burn treatment, it is impossible to confirm the replacement time, so replacement is delayed, resulting in additional infection. To solve this problem, liposomes capable of bacterial sensing were prepared using 5(6)-Carboxyfluorescein, Phosphatidylcholine, 1,2-Dipalmitoyl-sn-glycero-3-phosphocholine, Cholesterol, and 10,12-Tricosadiynoic acid. In this study, evaluation of changes in drug encapsulation rate in liposomes according to changes in three types of phosphatidylcholine phospholipids during liposome production, high-performance phosphatidylcholine phospholipids selected through vesicle size analysis, low and high temperature stability evaluation, bacterial sensitization ability evaluation, animals cell responses were assessed.

• Proceedings of the Korean Society for Applied Microbiology Conference
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• 2004.06a
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• pp.195-195
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• 2004

• Proceedings of the Korean Society of Applied Pharmacology
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• 2007.04a
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• pp.125-144
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• 2007

• Proceedings of the Korean Society of Life Science Conference
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• 2002.09a
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• pp.67-68
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• 2002

• Proceedings of the Zoological Society Korea Conference
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• 1997.10b
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• pp.195.1-195
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• 1997

No Abstract, See Full Text

• Proceedings of the Korean Society of Life Science Conference
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• 2002.03a
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• pp.78-78
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• 2002

• Bulletin of the Korean Chemical Society
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• v.14 no.2
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• pp.168-169
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• 1993

• BMB Reports
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• v.55 no.4
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• pp.204-204
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• 2022