نتایج جستجو برای: first order and shell progressive particle diffusion equations adequately described fe release

تعداد نتایج: 17161785  

2012
Hyeongkae Park Rick M. Rauenzahn Dana A. Knoll Christopher K. Newman

20 The Boltzmann transport equation describes the statistical behavior of particles that are interacting with surrounding media. The transport equation is used to simulate neutral particle physics in many physical systems–for example, combustion systems, nuclear power reactors, and internal confinement fusion. Unfortunately, many iterative schemes, based on an explicit scattering and re-emissio...

پایان نامه :0 1374

in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...

Rais Ahmad, Rajeev Kumar

Ginger waste material (GWM) has been utilized as adsorbent for removal of hazardousPatent Blue VF (PBVF) dye from aqueous solution. Batch adsorption experiments wereperformed as a function of pH, contact time, dye concentration, adsorbent dose and temperature.The optimum pH required for the maximum adsorption was found to be 2. The experimentalequilibrium adsorption data were tested using Langm...

The buckling analysis of stiffened cylindrical shells by rings and stringers made of functionally graded materials subjected to axial compression loading is presented. It is assumed that the material properties vary as a power form of the thickness coordinate variable. The fundamental relations, the equilibrium and stability equations are derived using the first order shear deformation theory. ...

Ali Nokhodchi, Mitra Jelveghari Mohammad-Reza Siahi Siavoosh Dastmalchi

      Benzoyl peroxide (BPO) is a first-line topical treatment in acne vulgaris, and it is superior to antibiotics, because the bacteria do not develop resistance to it. Skin irritation is a common side effect, and it has been shown that controlled release of BPO from a delivery system to the skin could reduce the side effects while reducing percutaneous absorption. Therefore, the purpose of t...

Journal: :Materials & Design 2021

Aluminum particles (Al) inherently contain a natural oxide (Al2O3) coating that limits rates of diffusion-controlled energy release and can prevent complete conversion the chemical available within an Al particle. Therefore, altering surface properties to reduce shell and/or transform chemistry are active areas research. This study used atmospheric pressure plasmas aluminum shell, then examined...

Journal: :iranian journal of pharmaceutical sciences 0
harun-or- rashid department of pharmaceutical technology, university of dhaka, dhaka, bangladesh abul kalam lutful kabir department of pharmacy, stamford university bangladesh, dhaka - 1217 md. zakir hossaina department of pharmaceutical technology, university of dhaka, dhaka, bangladesh abu shara shamsur rouf department of pharmaceutical technology, university of dhaka, dhaka, bangladesh

the purpose of this work was to develop once daily sustained release (sr) matrix tablets of naproxen, an anti-inflammatory agent. the tablets were prepared by wet granulation method along with hydrophilic matrix materials like methocel k 15m cr and methocel k 100m cr. the granules were evaluated for bulk density, angle of repose, compressibility index, total porosity and drug content. the table...

Journal: :Acta poloniae pharmaceutica 2006
Hamzah M Maswadeh Mohammad H Semreen Abdulatif A Abdulhalim

Oral dosage forms containing 300 mg theophylline in matrix type tablets, were prepared by direct compression method using two kinds of matrices, glycerylbehenate (hydrophobic), and (hydroxypropyl)methyl cellulose (hydrophilic). The in vitro release kinetics of these formulations were studied at pH 6.8 using the USP dissolution apparatus with the paddle assemble. The kinetics of the dissolution ...

2006
H. K. RASLAN

Oral dosage forms containing 300 mg theophylline in matrix-type tablets were prepared by direct compression method using two kinds of matrices – glycerylbehenate (hydrophobic) and hydroxypropylmethyl cellulose (hydrophilic). The in vitro release kinetics of these formulations were studied at pH 6.8 using the USP dissolution apparatus with the paddle assemble. The kinetics of the dissolution pro...

Journal: :Environmental science & technology 2005
Yueqiang Liu Sara A Majetich Robert D Tilton David S Sholl Gregory V Lowry

Nanoscale Fe0 particles are a promising technology for in situ remediation of trichloroethene (TCE) plumes and TCE-DNAPL source areas, butthe physical and chemical properties controlling their reactivity are not yet understood. Here, the TCE reaction rates, pathways, and efficiency of two nanoscale Fe0 particles are measured in batch reactors: particles synthesized from sodium borohydride reduc...

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