The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
Maria Jose Garciacelma - One of the best experts on this subject based on the ideXlab platform.
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studies on the formation of o w nano emulsions by low energy emulsification methods suitable for Pharmaceutical Applications
European Journal of Pharmaceutical Sciences, 2005Co-Authors: Núria Sadurní, N. Azemar, Conxita Solans, Maria Jose GarciacelmaAbstract:The formation of O/W nano-emulsions suitable for Pharmaceutical Application and the solubilisation of a practically non-water-soluble drug, lidocaine, have been studied in water/non-ionic surfactant/oil systems. Nano-emulsions were prepared by using low-energy emulsification methods, changing the composition at constant temperature. Kinetic stability was assessed by measuring droplet diameter as a function of time. Lidocaine solubilisation was studied in nano-emulsions with high water content. In the water/Cremophor EL/Miglyol 812 system the lowest droplet sizes, from 14 to 39nm at 10/90 and 40/60 oil/surfactant ratios, respectively, and 90% of water content, were obtained with an emulsification method consisting of stepwise addition of water to oil/surfactant mixtures at 70 degrees C. Nano-emulsions of this system showed high kinetic stability. Droplet diameters did not exceed 67nm after a period of at least 7 months. The maximum lidocaine concentration solubilised in nano-emulsions of the water/Cremophor EL/Miglyol 812 system with 90 and 95% of water content was 3.5 and 2.1%, respectively. These values are within the therapeutic range of lidocaine.
Núria Sadurní - One of the best experts on this subject based on the ideXlab platform.
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studies on the formation of o w nano emulsions by low energy emulsification methods suitable for Pharmaceutical Applications
European Journal of Pharmaceutical Sciences, 2005Co-Authors: Núria Sadurní, N. Azemar, Conxita Solans, Maria Jose GarciacelmaAbstract:The formation of O/W nano-emulsions suitable for Pharmaceutical Application and the solubilisation of a practically non-water-soluble drug, lidocaine, have been studied in water/non-ionic surfactant/oil systems. Nano-emulsions were prepared by using low-energy emulsification methods, changing the composition at constant temperature. Kinetic stability was assessed by measuring droplet diameter as a function of time. Lidocaine solubilisation was studied in nano-emulsions with high water content. In the water/Cremophor EL/Miglyol 812 system the lowest droplet sizes, from 14 to 39nm at 10/90 and 40/60 oil/surfactant ratios, respectively, and 90% of water content, were obtained with an emulsification method consisting of stepwise addition of water to oil/surfactant mixtures at 70 degrees C. Nano-emulsions of this system showed high kinetic stability. Droplet diameters did not exceed 67nm after a period of at least 7 months. The maximum lidocaine concentration solubilised in nano-emulsions of the water/Cremophor EL/Miglyol 812 system with 90 and 95% of water content was 3.5 and 2.1%, respectively. These values are within the therapeutic range of lidocaine.
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Studies on the formation of O/W nano-emulsions, by low-energy emulsification methods, suitable for Pharmaceutical Applications.
European Journal of Pharmaceutical Sciences, 2005Co-Authors: Núria Sadurní, N. Azemar, Conxita Solans, María José García-celmaAbstract:Abstract The formation of O/W nano-emulsions suitable for Pharmaceutical Application and the solubilisation of a practically non-water-soluble drug, lidocaine, have been studied in water/non-ionic surfactant/oil systems. Nano-emulsions were prepared by using low-energy emulsification methods, changing the composition at constant temperature. Kinetic stability was assessed by measuring droplet diameter as a function of time. Lidocaine solubilisation was studied in nano-emulsions with high water content. In the water/Cremophor EL/Miglyol 812 system the lowest droplet sizes, from 14 to 39 nm at 10/90 and 40/60 oil/surfactant ratios, respectively, and 90% of water content, were obtained with an emulsification method consisting of stepwise addition of water to oil/surfactant mixtures at 70 °C. Nano-emulsions of this system showed high kinetic stability. Droplet diameters did not exceed 67 nm after a period of at least 7 months. The maximum lidocaine concentration solubilised in nano-emulsions of the water/Cremophor EL/Miglyol 812 system with 90 and 95% of water content was 3.5 and 2.1%, respectively. These values are within the therapeutic range of lidocaine.
Ali Demirci - One of the best experts on this subject based on the ideXlab platform.
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Effect of different additives on bacterial cellulose production by Acetobacter xylinum and analysis of material property
Cellulose, 2009Co-Authors: Kuan-chen Cheng, Jeffrey M. Catchmark, Ali DemirciAbstract:Bacterial cellulose (BC) demonstrates unique properties including high mechanical strength, high crystallinity, and high water retention ability, which make it an useful material in many industries, such as food, paper manufacturing, and Pharmaceutical Application. In this study, different additives including agar, carboxymethylcellulose (CMC), microcrystalline cellulose, and sodium alginate were added into fermentation medium in agitated culture to enhance BC production by Acetobacter xylinum . The optimal additive was chosen based on the amount of BC produced. The produced BC was analyzed by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA). Among the evaluated additives, CMC yielded highest BC production (8.2 g/L) compared to the control (1.3 g/L). The results also indicated that CMC-altered BC production increased with CMC addition and reached saturation around 1%. The variation between replicates for all analysis was
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effect of different additives on bacterial cellulose production by acetobacter xylinum and analysis of material property
Cellulose, 2009Co-Authors: Kuan-chen Cheng, Jeffrey M. Catchmark, Ali DemirciAbstract:Bacterial cellulose (BC) demonstrates unique properties including high mechanical strength, high crystallinity, and high water retention ability, which make it an useful material in many industries, such as food, paper manufacturing, and Pharmaceutical Application. In this study, different additives including agar, carboxymethylcellulose (CMC), microcrystalline cellulose, and sodium alginate were added into fermentation medium in agitated culture to enhance BC production by Acetobacter xylinum. The optimal additive was chosen based on the amount of BC produced. The produced BC was analyzed by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA). Among the evaluated additives, CMC yielded highest BC production (8.2 g/L) compared to the control (1.3 g/L). The results also indicated that CMC-altered BC production increased with CMC addition and reached saturation around 1%. The variation between replicates for all analysis was <5%. From XRD analysis, however, the crystallinity and crystal size decreased as CMC addition increased. FESEM results showed CMC-altered BC produced from agitated culture retained its interweaving property. TGA results demonstrated that CMC-altered BC had about 98% water retention ability, which is higher than BC pellicle produced with static culture. CMC-altered BC also exhibited higher Tmax compared to control. Finally, DMA results showed that BC from agitated culture loses its mechanical strength in both stress at break and Young’s modulus when compared to BC pellicle. This study clearly demonstrated that addition of CMC enhanced BC production and slightly changed its structure.
Conxita Solans - One of the best experts on this subject based on the ideXlab platform.
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studies on the formation of o w nano emulsions by low energy emulsification methods suitable for Pharmaceutical Applications
European Journal of Pharmaceutical Sciences, 2005Co-Authors: Núria Sadurní, N. Azemar, Conxita Solans, Maria Jose GarciacelmaAbstract:The formation of O/W nano-emulsions suitable for Pharmaceutical Application and the solubilisation of a practically non-water-soluble drug, lidocaine, have been studied in water/non-ionic surfactant/oil systems. Nano-emulsions were prepared by using low-energy emulsification methods, changing the composition at constant temperature. Kinetic stability was assessed by measuring droplet diameter as a function of time. Lidocaine solubilisation was studied in nano-emulsions with high water content. In the water/Cremophor EL/Miglyol 812 system the lowest droplet sizes, from 14 to 39nm at 10/90 and 40/60 oil/surfactant ratios, respectively, and 90% of water content, were obtained with an emulsification method consisting of stepwise addition of water to oil/surfactant mixtures at 70 degrees C. Nano-emulsions of this system showed high kinetic stability. Droplet diameters did not exceed 67nm after a period of at least 7 months. The maximum lidocaine concentration solubilised in nano-emulsions of the water/Cremophor EL/Miglyol 812 system with 90 and 95% of water content was 3.5 and 2.1%, respectively. These values are within the therapeutic range of lidocaine.
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Studies on the formation of O/W nano-emulsions, by low-energy emulsification methods, suitable for Pharmaceutical Applications.
European Journal of Pharmaceutical Sciences, 2005Co-Authors: Núria Sadurní, N. Azemar, Conxita Solans, María José García-celmaAbstract:Abstract The formation of O/W nano-emulsions suitable for Pharmaceutical Application and the solubilisation of a practically non-water-soluble drug, lidocaine, have been studied in water/non-ionic surfactant/oil systems. Nano-emulsions were prepared by using low-energy emulsification methods, changing the composition at constant temperature. Kinetic stability was assessed by measuring droplet diameter as a function of time. Lidocaine solubilisation was studied in nano-emulsions with high water content. In the water/Cremophor EL/Miglyol 812 system the lowest droplet sizes, from 14 to 39 nm at 10/90 and 40/60 oil/surfactant ratios, respectively, and 90% of water content, were obtained with an emulsification method consisting of stepwise addition of water to oil/surfactant mixtures at 70 °C. Nano-emulsions of this system showed high kinetic stability. Droplet diameters did not exceed 67 nm after a period of at least 7 months. The maximum lidocaine concentration solubilised in nano-emulsions of the water/Cremophor EL/Miglyol 812 system with 90 and 95% of water content was 3.5 and 2.1%, respectively. These values are within the therapeutic range of lidocaine.
N. Azemar - One of the best experts on this subject based on the ideXlab platform.
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studies on the formation of o w nano emulsions by low energy emulsification methods suitable for Pharmaceutical Applications
European Journal of Pharmaceutical Sciences, 2005Co-Authors: Núria Sadurní, N. Azemar, Conxita Solans, Maria Jose GarciacelmaAbstract:The formation of O/W nano-emulsions suitable for Pharmaceutical Application and the solubilisation of a practically non-water-soluble drug, lidocaine, have been studied in water/non-ionic surfactant/oil systems. Nano-emulsions were prepared by using low-energy emulsification methods, changing the composition at constant temperature. Kinetic stability was assessed by measuring droplet diameter as a function of time. Lidocaine solubilisation was studied in nano-emulsions with high water content. In the water/Cremophor EL/Miglyol 812 system the lowest droplet sizes, from 14 to 39nm at 10/90 and 40/60 oil/surfactant ratios, respectively, and 90% of water content, were obtained with an emulsification method consisting of stepwise addition of water to oil/surfactant mixtures at 70 degrees C. Nano-emulsions of this system showed high kinetic stability. Droplet diameters did not exceed 67nm after a period of at least 7 months. The maximum lidocaine concentration solubilised in nano-emulsions of the water/Cremophor EL/Miglyol 812 system with 90 and 95% of water content was 3.5 and 2.1%, respectively. These values are within the therapeutic range of lidocaine.
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Studies on the formation of O/W nano-emulsions, by low-energy emulsification methods, suitable for Pharmaceutical Applications.
European Journal of Pharmaceutical Sciences, 2005Co-Authors: Núria Sadurní, N. Azemar, Conxita Solans, María José García-celmaAbstract:Abstract The formation of O/W nano-emulsions suitable for Pharmaceutical Application and the solubilisation of a practically non-water-soluble drug, lidocaine, have been studied in water/non-ionic surfactant/oil systems. Nano-emulsions were prepared by using low-energy emulsification methods, changing the composition at constant temperature. Kinetic stability was assessed by measuring droplet diameter as a function of time. Lidocaine solubilisation was studied in nano-emulsions with high water content. In the water/Cremophor EL/Miglyol 812 system the lowest droplet sizes, from 14 to 39 nm at 10/90 and 40/60 oil/surfactant ratios, respectively, and 90% of water content, were obtained with an emulsification method consisting of stepwise addition of water to oil/surfactant mixtures at 70 °C. Nano-emulsions of this system showed high kinetic stability. Droplet diameters did not exceed 67 nm after a period of at least 7 months. The maximum lidocaine concentration solubilised in nano-emulsions of the water/Cremophor EL/Miglyol 812 system with 90 and 95% of water content was 3.5 and 2.1%, respectively. These values are within the therapeutic range of lidocaine.
