Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Esam A. El-Hefian"'
Publikováno v:
E-Journal of Chemistry, Vol 9, Iss 3, Pp 1431-1439 (2012)
Chitosan/agar (CS/AG) films were prepared by blending different proportions of chitosan and agar (considering chitosan as the main component) in solution forms. The chemical structure and the morphology of the obtained blended films were investigated
Externí odkaz:
https://doaj.org/article/fd590f9a7e7c46aa93f445909c389475
Publikováno v:
E-Journal of Chemistry, Vol 8, Iss 1, Pp 91-96 (2011)
In this study, blends of chitosan (CS) and polyvinyl alcohol (PVA) (CS/PVA) having various proportions were prepared and characterized by universal mechanical tester, the differential scanning calorimetry (DSC) and contact angle measurements. Studyin
Externí odkaz:
https://doaj.org/article/f79d2f1a0dbb41e29513699da3efeee2
Autor:
Esam A. El-hefian
Publikováno v:
Maejo International Journal of Science and Technology, Vol 4, Iss 02, Pp 261-267 (2010)
In this study, a number of aqueous solutions of chitosan/agar blends (with chitosan as the major component) were prepared. The effects of temperature, shear rate and shearing time on the rheological property, i.e. the apparent viscosity, were investi
Externí odkaz:
https://doaj.org/article/ed1d9d341e04433ea2d66042e512ce48
Autor:
Esam A. El-hefian
Publikováno v:
Maejo International Journal of Science and Technology, Vol 4, Iss 02, Pp 210-220 (2010)
Chitosan, a modified natural carbohydrate polymer derived from carapaces of crabs and shrimps, has received a great deal of attention for its applications in diverse fields owing to its biodegradability, biocompatibility, non-toxicity and anti-bacter
Externí odkaz:
https://doaj.org/article/c63f6086624749abb310fcfa4c45d348
Publikováno v:
E-Journal of Chemistry, Vol 7, Iss 4, Pp 1212-1219 (2010)
In this study, chitosan and PVA were blended at different proportions (considering chitosan as the main component) in solution forms. The chemical structure and the morphology of the obtained blend films were investigated using FTIR and field emissio
Externí odkaz:
https://doaj.org/article/784386880d9d45e28aa31f3b75831d36
Autor:
Esam A. El-hefian
Publikováno v:
Maejo International Journal of Science and Technology, Vol 3, Iss 03, Pp 415-425 (2009)
The intrinsic viscosity of chitosan (MW 7.9 x 105 g mol-1) having a high degree of deacetylation and solubilised in aqueous formic and acetic acids was determined at room temperature. Contact angle and conductivity of the chitosan solutions were also
Externí odkaz:
https://doaj.org/article/b01d6a25740742de9b730571a5ff0c97
Autor:
Esam A. El-hefian
Publikováno v:
Maejo International Journal of Science and Technology, Vol 3, Iss 02, Pp 277-286 (2009)
The surface pressure- molecular area (-A) isotherm curves of two fatty acids of different chain lengths, i.e. stearic (C18) and arachidic (C20) acids, were obtained by using Langmuir-Blodgett (LB) technique. Results showed clear isotherm plots wit
Externí odkaz:
https://doaj.org/article/33e5d03eaf5642b9bab86ceb565021af
Publikováno v:
E-Journal of Chemistry, Vol 8, Iss S1, Pp S105-S112 (2011)
The mechanical and thermal properties of chitosan/agar/poly vinyl alcohol (CS/AG/PVA) ternary blended films having various proportions considering chitosan as the main component were investigated. The various variables static water contact angle such
Externí odkaz:
https://doaj.org/article/42c06943f69f4dfd8327a882c374b8ab
Publikováno v:
E-Journal of Chemistry, Vol 8, Iss S1, Pp S409-S419 (2011)
Hydrogel films of chitosan (Cs) and agar blends of various proportions were prepared using physical solution blending. Some of the obtained films were ionically cross-linked by treatment with calcium chloride solution. The obtained films were charact
Externí odkaz:
https://doaj.org/article/5289de0a2d754a4a8636ef6fe40f4684
Publikováno v:
E-Journal of Chemistry, Vol 7, Iss S1, Pp S349-S357 (2010)
Blends of chitosan (CS) and polyvinyl alcohol (PVA) of different proportions (considering chitosan as the main component) were prepared. The rheological properties of the obtained blend solutions such as the shearing viscosity and the shear stress we
Externí odkaz:
https://doaj.org/article/43469770fb8547e7822917a5f7512947