Physicochemical characterization of the thermo-induced self-assembly of thermo-responsive PDMAEMA-b-PDEGMA copolymers

Natural and artificial autonomous molecular machines operate by constantly dissipating energy coming from an external source to maintain a non-equilibrium state. The in-depth study of these dissipative states is highly challenging as they exist only as long as energy is provided. Here we report on the detailed physicochemical characterization of the dissipative operation of a supramolecular pump transducing light energy into chemical energy by shifting the equilibrium of self-assembly reactions. The composition of the system under light irradiation was followed in real-time by 1H NMR and parameters such as the dissipation and the energy storage at the steady state were extracted for four different irradiation intensities. For the first time in an artificial system, we quantitatively probed the relationship between the light energy input and the deviation of the dissipative state from thermodynamic equilibrium. Our results also provide a testing ground for newly developed theoretical models.

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Physicochemical characterization of the layer-by-layer self-assembly of polyphenol oxidase and chitosan on glassy carbon electrode

Electrochimica Acta ◽

10.1016/j.electacta.2004.11.040 ◽

2005 ◽

Vol 50 (14) ◽

pp. 2865-2877 ◽

Cited By ~ 32

Author(s):

L. Coche-Guérente ◽

J. Desbrières ◽

J. Fatisson ◽

P. Labbé ◽

M.C. Rodriguez ◽

...

Keyword(s):

Glassy Carbon Electrode ◽

Polyphenol Oxidase ◽

Glassy Carbon ◽

Self Assembly ◽

Physicochemical Characterization ◽

Carbon Electrode ◽

Layer By Layer

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Synthesis and Physicochemical Characterization of Mg-Al-Flufenamate-Layered Double Hydroxide

Materials Science Forum ◽

10.4028/www.scientific.net/msf.887.100 ◽

2017 ◽

Vol 887 ◽

pp. 100-103

Author(s):

Siti Halimah Sarijo ◽

Monica Limau Jadam ◽

Z. Jubri

Keyword(s):

Organic Compound ◽

Layered Double Hydroxide ◽

Self Assembly ◽

Physicochemical Characterization ◽

Flufenamic Acid ◽

Basal Spacing ◽

Hybrid Nanocomposite ◽

Assembly Technique ◽

Double Hydroxide

A nonsteroidal drug, flufenamic acid (FA) was successfully intercalated into magnesium-aluminium-layered double hydroxide, MAL for the formation of magnesium-aluminium-flufenamate-layered double hydroxide, MAF by self-assembly technique. As a result of the successful intercalation, basal spacing increased from 9.8 Å in the MAL to 23.5 Å in the MAF hybrid nanocomposite. The FTIR spectra of the MAF hybrid nanocomposite show resemblance peaks of the MAL and FA suggesting the inclusion of the organic compound into the MAL interlamellae. The percentage loading of FA was found to be 74.4 % (w/w) calculated from the percentage of carbon in the resulting material, MAF.

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Physicochemical Characterization of Nanocomposite Based on Recycled Expanded Polystyrene Reinforced with Clay: Application as Methanol Fuel Cell Membrane

Modern Environmental Science and Engineering ◽

10.15341/mese(2333-2581)/04.02.2016/011 ◽

2016 ◽

Vol 2 (04) ◽

pp. 279-287

Author(s):

Mbarek Stouri ◽

Imene Bekri-Abbes ◽

Ezzeddine Srasra

Keyword(s):

Fuel Cell ◽

Cell Membrane ◽

Physicochemical Characterization ◽

Expanded Polystyrene ◽

Methanol Fuel Cell

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Optimization and Physicochemical Characterization of Chitosan and Chitosan Nanoparticles Extracted from the Crayfish Procambarus clarkii Wastes

Journal of Shellfish Research ◽

10.2983/035.038.0220 ◽

2019 ◽

Vol 38 (2) ◽

pp. 385 ◽

Cited By ~ 3

Author(s):

Marwa M. El-Naggar ◽

Wael S. I. Abou-Elmagd ◽

Ashraf Suloma ◽

Hamza A. El-Shabaka ◽

Magdy T. Khalil ◽

...

Keyword(s):

Procambarus Clarkii ◽

Chitosan Nanoparticles ◽

Physicochemical Characterization

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Morpho-anatomical, histological, phytochemical and physicochemical characterization of Dicliptera bupleuroies Nees

Pakistan Journal of Botany ◽

10.30848/pjb2021-3(23) ◽

2020 ◽

Vol 53 (3) ◽

Author(s):

Shehla Akbar ◽

Saiqa Ishtiaq

Keyword(s):

Physicochemical Characterization

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Physicochemical Characterization of Solid Dispersions of Cefdinir with PVP K-30 and PEG 4000

International Journal of Pharmaceutical Sciences and Nanotechnology ◽

10.37285/ijpsn.2010.3.2.8 ◽

2010 ◽

Vol 3 (2) ◽

pp. 948-956

Author(s):

Kumar P ◽

S Kumar ◽

A Kumar ◽

M Chander

Keyword(s):

Solid Dispersions ◽

Physicochemical Characterization ◽

Drug Carriers ◽

Dissolution Properties ◽

Rate Of Dissolution ◽

Peg 4000 ◽

Release Studies ◽

Crystalline Nature ◽

Physical Mixtures

The purpose of this study was to prepare and characterize solid dispersions of the antibacterial agent Cefdinir with PEG 4000 and PVP K-30 with a view to improve its dissolution properties. Investigations of the properties of the dispersions were performed using release studies, X-ray powder diffraction (XRD) and Fourier transform infrared (FTIR). The results obtained showed that the rate of dissolution of Cefdinir was considerably improved when formulated in solid dispersions with PVP K-30 and PEG 4000 as compared with pure drug and physical mixtures. The results from XRD studies showed the transition of crystalline nature of drug to amorphous form, while FTIR studies demonstrated the absence of drug-carriers interaction.

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