PFG‐NMR Investigation of Liposome Systems Containing Hydrotrope

Odeh, Fadwa; Heldt, Nicole; Gauger, Michele; Slack, Gregory C.; Li, Yunwei

doi:10.1080/01932690600660574

Cited by 9 publications

(6 citation statements)

References 20 publications

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“…The average size was found to be 71.1 nm, and the polydispersity index (PDI) was 0.6920. The actual diameter of nanoparticles is predicted to be smaller than this value (71 nm) due to a solvent layer and the materials of surface coating attached to the surface of the particles as it moves under the Brownian motion influence [57]. As seen in Figure 2, there are two size distributions, the major population at ~70 nm, while the other one at ~0.5 µm, which are also present in the TEM image.…”

Section: Uv-vis and Dls Measurementsmentioning

confidence: 94%

Green Synthesis of Silver Nanoparticles as an Effective Antibiofouling Material for Polyvinylidene Fluoride (PVDF) Ultrafiltration Membrane

et al. 2021

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Silver nanoparticles (AgNPs) were successfully synthesized using the aqueous extract of the Paronychia argentea Lam (P. argentea) wild plant. The results showed that the conversion of Ag+ to Ag0 nanoparticles ratio reached 96.5% as determined by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), with a negative zeta potential (ζ) of −21.3 ± 7.68 mV of AgNPs expected to improve the stability of synthesized AgNPs. AgNP antibacterial activity has been examined against Streptococcus aureus (S. aureus) and Escherichia coli (E. coli) bacteria. The minimum inhibition concentration (MIC) was 4.9 µL/mL for both E. coli and S. aureus bacteria, while the minimum bactericidal concentrations (MBC) were 19.9 µL/mL and 4.9 µL/mL for S. aureus and E. coli, respectively. The synthesized AgNPs were incorporated in ultrafiltration polyvinylidene Fluoride (PVDF) membranes and showed remarkable antibiofouling behavior against both bacterial strains. The membranes were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and X-ray diffraction (XRD). The contact angle and porosity of the membrane were also determined. The efficiency of the membranes regarding rejection rate was assessed using bovine serum albumin (BSA). It was found in the flux experiments that membranes BSA rejection was 99.4% and 98.7% with and without AgNPs, respectively.

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Section: Uv-vis and Dls Measurementsmentioning

confidence: 94%

Green Synthesis of Silver Nanoparticles as an Effective Antibiofouling Material for Polyvinylidene Fluoride (PVDF) Ultrafiltration Membrane

et al. 2021

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“…Odeh and co-workers have been measuring the size of phospholipid liposomes by light scattering and diffusion NMR. The latter measurements were facilitated by the incorporation of species that "fluidize" the liposome membrane such as hydrotropes and/or PEG-lipids [27].…”

Section: Introductionmentioning

confidence: 99%

Dynamic and structural aspects of PEGylated liposomes monitored by NMR

Leal

Røgnvaldsson²,

Fossheim³

et al. 2008

Journal of Colloid and Interface Science

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“…This becomes even more obvious if we vary the diffusion coefficient in our analysis, up to higher values found by PFG-NMR (Figure ). We also include the value of κ η for the 0.1% sample reported from the literature . The horizontal line represents 20 k B T .…”

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Dynamics of Phospholipid Membranes beyond Thermal Undulations

Gupta

Mel

Perera

et al. 2018

J. Phys. Chem. Lett.

115

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We investigated the molecular dynamics of unilamellar liposomes by neutron spin echo spectroscopy. We report the first experimental evidence of a short-range motion at the length scale of the size of the headgroup of a lipid. The associated mean squared displacement shows a t dependence in the pico- to nanosecond region that indicates another process beyond the predictions of the Zilman-Granek (ZG) model ( t) and translational diffusion ( t). A comparison with theory shows that the observed low exponent is associated with a non-Gaussian transient trapping of lipid molecules in a local area and supports the continuous time random walk model. The analysis of the mean squared displacement leads to the important conclusion that the friction at the interface between water and liposomes plays a minor role. Center of mass diffusion of liposomes and transient trapping of lipids define the range in which the ZG model can be applied to analyze membrane fluctuations.

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PFG‐NMR Investigation of Liposome Systems Containing Hydrotrope

Cited by 9 publications

References 20 publications

Green Synthesis of Silver Nanoparticles as an Effective Antibiofouling Material for Polyvinylidene Fluoride (PVDF) Ultrafiltration Membrane

Green Synthesis of Silver Nanoparticles as an Effective Antibiofouling Material for Polyvinylidene Fluoride (PVDF) Ultrafiltration Membrane

Dynamic and structural aspects of PEGylated liposomes monitored by NMR

Dynamics of Phospholipid Membranes beyond Thermal Undulations

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