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

2019 ◽  
Vol 38 (2) ◽  
pp. 385 ◽  
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

Physicochemical characterization of chitosan nanoparticles: electrokinetic and stability behavior

2005 ◽  
Vol 283 (2) ◽  
pp. 344-351 ◽  
Author(s):  
T. López-León ◽  
E.L.S. Carvalho ◽  
B. Seijo ◽  
J.L. Ortega-Vinuesa ◽  
D. Bastos-González
Keyword(s):  
Chitosan Nanoparticles ◽  
Physicochemical Characterization ◽  
Stability Behavior

scholarly journals Physicochemical Characterization of Packaging Foils Coated by Chitosan and Polyphenols Colloidal Formulations

2020 ◽  
Vol 21 (2) ◽  
pp. 495 ◽  
Author(s):  
Lidija Fras Zemljič ◽  
Olivija Plohl ◽  
Alenka Vesel ◽  
Thomas Luxbacher ◽  
Sanja Potrč
Keyword(s):  
Surface Charge ◽  
Elemental Composition ◽  
Chitosan Nanoparticles ◽  
Physicochemical Characterization ◽  
Surface Characteristics ◽  
Nanoparticle Dispersions ◽  
Physico Chemical ◽  
Additive Formulation ◽  
Uv Ozone

In this research, antimicrobial polysaccharide chitosan was used as a surface coating for packaging material. The aim of our research was to establish an additive formulation of chitosan and antioxidative plant extracts as dispersion of nanoparticles. Chitosan nanoparticles with embedded thyme, rosemary and cinnamon extracts were synthesized, and characterized for this purpose. Two representative, commercially used foils, polypropylene (PP) and polyethylene (PE), previously activated by UV/ozone to improve coating adhesion, were functionalized using chitosan-extracts nanoparticle dispersions. The foils were coated by two layers. A solution of macromolecular chitosan was applied onto foils as a first layer, followed by the deposition of various extracts embedded into chitosan nanoparticles that were attached as an upper layer. Since active packaging must assure bioactive efficiency at the interface with food, it is extremely important to understand the surface characteristics and phenomena of functionalized foils. The physico-chemical analyses of functionalized foils were thus comprised of surface elemental composition, surface charge, wettability, as well as surface morphology. It has been shown that coatings were applied successfully with an elemental composition, surface charge and morphology that should enable coating stability, homogeneity and consequently provide an active concept of the packaging surface in contact with food. Moreover, the wettability of foils was improved in order to minimize the anti-fogging behavior.

A preliminary physicochemical characterization of an agglutinin found in the hemolymph of the crayfish Procambarus clarkii

1972 ◽  
Vol 19 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Van H. Miller ◽  
R. Steven Ballback ◽  
Gilbert B. Pauley ◽  
Stuart M. Krassner
Keyword(s):  
Procambarus Clarkii ◽  
Physicochemical Characterization

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

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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