نتایج جستجو برای: osmotic capsule

تعداد نتایج: 44042  

Journal: :iranian journal of pharmaceutical sciences 0
mohammad barzegar jalali department of pharmaceutics, faculty of pharmacy drug applied research center, tabriz university of medical sciences, tabriz, iran mohammad reza siyahi shadbad department of pharmaceutics, faculty of pharmacy azim barzegar-jalai iranian blood transfusion organization, ardabil, iran khosro adibkia department of pharmaceutics, faculty of pharmacy department of pharmaceutics, faculty of pharmacy, zanjan university of medical sciences, zanjan, iran ghobad mohammadi department of pharmaceutics, faculty of pharmacy, kermanshah university of medical sciences, kermanshah, iran behnaz aghai department of pharmaceutics, faculty of pharmacy mahdi zeraati

hard gelatin capsule filled with acetaminophen, osmotic agent (sorbitol), a release promoter (sodium dodecyl sulfate), coated with a semipermeable cellulose acetate membrane containing a hydrophobic plasticizer (castor oil) and sealed with white bees wax plug was designed. when placed in the sink water penetrates the membrane, dissolves the osmotic agent and increases the osmotic pressure insid...

Azim Barzegar-Jalai Behnaz Aghai Ghobad Mohammadi Khosro Adibkia Mahdi Zeraati Mohammad Barzegar Jalali, Mohammad Reza Siyahi Shadbad

      Hard gelatin capsule filled with acetaminophen, osmotic agent (sorbitol), a release promoter (sodium dodecyl sulfate), coated with a semipermeable cellulose acetate membrane containing a hydrophobic plasticizer (castor oil) and sealed with white bees wax plug was designed. When placed in the sink water penetrates the membrane, dissolves the osmotic agent and increases the osmotic pressure...

2013
P. K. Sahoo Harleen Makar

Asymmetric membrane capsules are a type of osmotic drug delivery systems. They are nondisintegrating capsules, which utilize osmotic pressure to drive the drug outwards for controlled delivery. Preceded by systems such as elementary osmotic pump, controlled porosity osmotic pump, single composition osmotic tablet this system has the advantage of simple and easy fabrication as it obviates the ne...

Journal: :Annals of botany 2005
Guido Bohne Holger Woehlecke Rudolf Ehwald

BACKGROUND AND AIMS Water adhesion forces, water absorption capacity and permeability of the pine exine were investigated to consider a possible function of sporopollenin coatings in the control of water transport. METHODS The experiments were carried out with sporopollenin capsules obtained from pine pollen consisting of an empty central capsule and two sacci. Changes in the concentration of...

Journal: :Physical review letters 2012
Sujit S Datta Shin-Hyun Kim Jayson Paulose Alireza Abbaspourrad David R Nelson David A Weitz

Colloidal capsules can sustain an external osmotic pressure; however, for a sufficiently large pressure, they will ultimately buckle. This process can be strongly influenced by structural inhomogeneities in the capsule shells. We explore how the time delay before the onset of buckling decreases as the shells are made more inhomogeneous; this behavior can be quantitatively understood by coupling...

Journal: :Small 2014
Shin-Hyun Kim Tae Yong Lee Sang Seok Lee

Monodisperse microcapsules with ultra-thin membranes are microfluidically designed to be highly sensitive to osmotic pressure, thereby providing a tool for the direct measurement of the osmotic strength. To make such osmocapsules, water-in-oil-in-water double-emulsion drops with ultra-thin shells are prepared as templates through emulsification of core-sheath biphasic flow in a capillary microf...

Journal: :Journal of controlled release : official journal of the Controlled Release Society 2011
Kenneth C Waterman G Scott Goeken Sanjay Konagurthu Michael D Likar Bruce C MacDonald Nidhi Mahajan Vidya Swaminathan

An osmotic, oral, controlled-release capsule is described. This capsule provides drug delivery at fixed delivery rates (T(80%)=6 or 14h) independent of drug properties (e.g., solubility) or drug loading, thereby allowing rapid development of investigational or commercial drugs, especially for proof-of-concept type clinical studies. The capsule body and cap are prepared with cellulose acetate an...

2007
PRATIM K. CHOUDHURY MAHENDRA S. RANAWAT MOUSUMI K. PILLAI CHETAN S. CHAUHAN

agents in a controlled pattern for a prolonged period of time is a well-established fact. The concept of osmotic drug delivery was first introduced by Theeuwes (1). The simplest design of an osmotic drug delivery system consists of an osmotically active core surrounded by a semipermeable membrane, with one or more delivery orifices through which the drug is delivered in a controlled fashion. Va...

Journal: :Soft matter 2014
Sebastian Knoche Jan Kierfeld

We study the buckling of elastic spherical shells under osmotic pressure with the osmolyte concentration of the exterior solution as a control parameter. We compare our results for the bifurcation behavior with results for buckling under mechanical pressure control, that is, with an empty capsule interior. We find striking differences for the buckling states between osmotic and mechanical buckl...

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