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Setyawan, Dwi
- Solid State Characterization of Acyclovir-Nicotinamide Binary Systems using Solvent Evaporation Technique
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Authors
Affiliations
1 Airlangga University, Jl. Dharmawangsa Dalam Surabaya 60286, ID
2 School of Pharmacy, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung 40132, ID
1 Airlangga University, Jl. Dharmawangsa Dalam Surabaya 60286, ID
2 School of Pharmacy, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung 40132, ID
Source
Asian Journal of Pharmacy and Technology, Vol 7, No 1 (2017), Pagination: 33-36Abstract
Objective of the study is to characterize acyclovir-nicotinamide binary systems (AN). Methods of cocrystallization was solvent evaporation in equimolar ratio between acyclovir and nicotinamide using ethanol and methanol. The binary systems were characterized by polarization microscope, Differential Scanning Calorimetry (DSC) and Powder X-Ray Diffraction (PXRD). Physical characterization showed that AN binary systems have unique crystal habit in microscopic. A new endothermic peak appears at 123.69°C. The PXRD patterns of AN binary systems after cocrystallization are different from pure components which specific peak was found on 2θ = 11.27° (AN in ethanol); 21.05° (AN in methanol).Keywords
Acyclovir, Nicotinamide, Binary Systems, Solvent Evaporation, Ethanol, Methanol.
- The Design of Liposomal Vaccine Adjuvant
Abstract Views :204 |
PDF Views:0
Authors
Affiliations
1 Department of Pharmaceutics, Airlangga University. Jalan Dharmawangsa Dalam, 60286 Surabaya, ID
1 Department of Pharmaceutics, Airlangga University. Jalan Dharmawangsa Dalam, 60286 Surabaya, ID
Source
Asian Journal of Pharmacy and Technology, Vol 7, No 4 (2017), Pagination: 234-236Abstract
Vaccines are still the most effective way of preventing infectious diseases. Through vaccination, the immune system is exposed to the antigen so that its response will increase in subsequent exposure. Liposomes were first reported as a vaccine carrier in 1974 by Allison and Gregoriardis. Liposomes are chosen as carriers in a vaccine delivery system because they are made from natural, biodegradable, nontoxic and non-immunogenic phospholipids. The effectiveness of liposome formulation depends on various physicochemical factors such as vesicle size, surface charge, bilayer composition, coating, route of administration, adjuvant usage, encapsulation efficiency, and ultimately dependent on the lipid composition used. DDA (dietildioctadecylammonium) is one of the major lipid components in the vaccine adjuvant system because of its cationic nature, but DDA has a weakness in terms of its physical stability. The addition of cholesterol in the liposome composition may improve lipid packing thereby reducing or eliminating the phase transition temperature of the liposome system. APC contains many molecules expressed on the cell surface, which can be utilized in facilitating specific liposome targeting.Keywords
Liposome, Adjuvant, Vaccine, DDA, Formulation.References
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