Questions and Answers (1) View all
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Answer added in Pharmaceutics Formulation26 Dissolution testing of tablets- Which is the most accepted method for the purpose?By Alok Nahata · Dr. Harisingh Gour UniversityHaji Saringat · University of Science, MalaysiaAgreed with most of the answer above, iys all depand on the type of formulation but must conform with official pharmacopea,!Agreed with most of the answer above, iys all depand on the type of formulation but must conform with official pharmacopea,!Following
Publications (3) View all
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Article: Haruan (Channa striatus) incorporated palm-oil creams : formulation and stability studies.
Khalid A Sheikh, Saringat H J Baie, Gul Majeed Khan[show abstract] [hide abstract]
ABSTRACT: Topical emulsions stabilized with non-ionic emulsifiers have been an attractive alternative as vehicles for drug delivery, particularly for the patients suffering from dermatological problems. Haruan (a natural wound healer) creams were formulated with different types of emulsifiers (Tween 80 and Span 80) using different grades of Malaysian Palm-oleins (DFPL 56, 60, 62 and 65). The stability (at room temperature and accelerated stability testing) of the various creams was evaluated at different temperatures (5, 25 and 45 degrees C) for a period of 6 months by measuring changes in droplet size, viscosity and percentage oil separation. The emulsifier type and concentration showed pronounced effect on the physicochemical properties of the cream, whereas storage time did not. This study suggested that the choice of emulsifiers and concentration of haruan extract are the most important factors in the stability of the haruan creams.Pakistan journal of pharmaceutical sciences 02/2005; 18(1):1-5. · 1.10 Impact Factor -
SourceAvailable from: Gul Majid Khan
Article: The influence of different plasticizers on some physical and mechanical properties of hydroxypropyl methylcellulose free films.
Haji Baie Saringat, Khalid Ibrahim Alfadol, Gul Majid Khan[show abstract] [hide abstract]
ABSTRACT: Coating has been widely used in pharmaceutical manufacture either as non-functional or a functional entity. The objectives of the present study were to investigate the effect of plasticizers such as PEG400, PEG1000 and triacetin on mechanical properties, glass transition temperature and water vapor transmission of free films prepared from HPMC and/or HPMC:PVA blends, to develop suitable coating system for tablets, and to determine the release profiles of the coated tablets. The tensile strength of plasticized HPMC films was generally lower than that of control HPMC film and could be attributed to increased crystallinity and segmental chain mobility of HPMC. This effect increased as the concentration of plasticizer increased. Generally the addition of both grades of polyethylene glycol (PEG400 & PEG1000) increased the moisture permeability of HPMC films but the films containing triacetin provided a more rigid barrier to moisture compared to unplasticized HPMC films. The dissolution profiles of paracetamol tablets coated with 7% w/v HPMC coating-solutions containing PEG400, PEG1000 and triacetin, and those containing PEG400 & PVA together showed that HPMC had weak water resistance. The presence of PEG400 and 1000 in HPMC films further weakened its resistance to solubility while the presence of triacetin caused a little increase in HPMC water resistance. From the results it was concluded that HPMC at 7%w/w concentration was suitable for film-coating intended for non-functional coating. Presence of the PEG 400, PEG1000 and triacetin as well as the presence of PVA and PEG400 together improved the coating properties of HPMC films and made it more suitable as a non-functional coating material.Pakistan journal of pharmaceutical sciences 07/2005; 18(3):25-38. · 1.10 Impact Factor -
SourceAvailable from: Gul Majid Khan
Article: Evaluating the effects of plasticizer interactions with HPMC on the tack-behavior of polymer film-forming coating solutions.
Haji Baie Saringat, Khalid Ahmad Sheikh, Gul Majid Khan[show abstract] [hide abstract]
ABSTRACT: Tack is a concept that is widely used to describe the forces or energies involved in the separation of two parallel surfaces initially in contact through an intervening thin liquid film. The tackiness may cause tablets to stick with each other or to the walls of the coating apparatus. In this study, the HPMC coating solutions were evaluated for their tackiness and the effects of interactions between the polymer and plasticizers on the tack behavior of HPMC film-forming coating solutions were investigated, using type TA-XT2 texture analyzer. It was found that experimental factors such as the contact time, rate of separation and volume of the film-forming test solution could effectively influence the magnitude of tack behavior. Moreover, up to certain levels, the addition of plasticizers such as PEG 400 & 1000 and of triacetin caused a reduction in the tack value of the polymer solutions. It was concluded that in general, the tackiness depended upon the molecular weight and/or type and concentration of a plasticizer. The efficiency of plasticizers used to reduce the tackiness of HPMC solutions ranked as PEG1000 > triacetin > PEG400.Pakistan journal of pharmaceutical sciences 08/2004; 17(2):29-39. · 1.10 Impact Factor