Fickian diffusion
Non-Fickian diffusion and the accumulation of methane bubbles in deep-water sediments
... by diffusion of methane through porewater, controlled by (i) the methane satu- ration of the aqueous solution throughout the sediment volume, and (ii) non-Fickian diffusion ...thermal ...
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Application of Fickian and non Fickian diffusion models to study moisture diffusion in asphalt mastics
... moisture diffusion in asphalt mastics in order to better understand moisture damage in asphalt ...moisture diffusion is obvious even though their effect on the actual mechanism of moisture damage is not ...
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Electrospun PLLA Membranes for Caffeine Delivery: Diffusional Approach
... One of the great advantages of electrospun fibers is the large tridimensional area produced, capable of storing any type of material. The aim of our investigation is to study the elec- trospinning technique to produce ...
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Formulation and Invitro Evaluation of Sustained Release Matrix Tablets of Ibuprofen.
... pure Fickian diffusion and case II ...normal Fickian diffusion by hindering the release of embedded drug, leading to an extended period of drug delivery, and possibly zero-order ...
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PROLONG RELEASE BIOADHESIVE VAGINAL FILM OF ANTI HIV DRUG (ZIDOVUDINE): FORMULATION AND IN VITRO EVALUATION
... polymers, diffusion of the dissolved drug in the matrix and erosion of the gel ...I Fickian release (n = 0.5), Case II non-Fickian (anomalous) release ...I Fickian diffusion control, ...
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PREPARATION AND CHARACTERIZATION OF LUMEFANTRINPEG 4000 SOLID DISPERSIONS
... non-Fickian diffusion release [23] The release rate kinetics (k) for Higuchi model gave release rate constant significantly higher than that of the other models employed in the study confirming that the ...
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Formulation, In Vitro and In Vivo Pharmacokinetics of Anti-HIV Vaginal Bioadhesive Gel
... polymer, diffusion of the dissolved drug in the matrix and erosion of the gel ...the Diffusion control studies Table 3 and Figure 1, it was observed that the F1 (n = ...I Fickian diffusion ...
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Design of Tinidazole Matrix Tablets of for Colon Specific Drug Delivery Employing Eudragit S 100, PEG 6000 and Lactose
... The matrix tablets each containing 300 mg of tinidazole are prepared employing Kollidon SR in different percents (8.3%, 16.6%, 25% and 33.3%) by direct compression method. The hardness of the tablets was in the range of ...
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FORMULATION AND EVALUATION OF SUSTAINED RELEASE DICLOFENAC SODIUM MICROSPHERES USING EUDRAGIT RS100
... is Fickian diffusion, non-Fickian diffusion or zero ...non Fickian diffusion when it applied to the Korsmeyer-Peppas model for mechanism of drug ...
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Synthesis of cellulose acetate nanofibers and its application in the release of some drugs
... Results: Characterization of the radius of fiber is shown as 52.9 ± 0.1nm with scanning electron microscopy (SEM). The full range drug release profiles of nanofibers are shown as 80.7% of the contained drug in 8h. The ...
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Preparation and characterisation of fluconazole vaginal films for the treatment of vaginal Candidiasis
... Objective of the present study was to develop and evaluate vaginal films with essential in vitro studies. Films were developed using hydroxypropyl methylcellulose as a polymer and formulations were coded. The developed ...
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FORMULATION, OPTIMIZATION AND IN VITRO CHARACTERIZATION OF STAVUDINE GASTRO RETENTIVE FLOATING MATRIX TABLETS
... Drug diffusion through most types of polymeric systems is often best described by Fickian diffusion, but in addition to diffusion, other processes are also ...anomalous diffusion as a ...
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Apparent diffusion coefficient values detected by diffusion-weighted imaging in the prognosis of patients with locally advanced esophageal squamous cell carcinoma receiving chemoradiation
... unique diffusion characteristics, as revealed by the apparent diffusion coefficient (ADC), which can be determined from the diffusion-weighted imaging (DWI) ...
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Computational Modelling of Wire Biosensor with Competitive Substrates Conversion
... The creation of new biosensors or the optimization of the existing ones by means of physical experiments is troublesome and tedious process. Part of the experiments can be replaced by using mathematical modelling [8], ...
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Identifying Non Darcian Flow and Non Fickian Pressure Propagation in Field Scale Discrete Fracture Networks
... 4.4. Non-Darcian Flow versus Non-Fickian Pressure Propagation We do not find direct correlation between non-Darcian flow and non-Fickian pressure propagation in field-scale DFNs. Non-Darcian flow quantifies ...
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New Mathematical Solution for Analyzing Interdiffusion Problems
... The author derived the two new eqs. (8) and (9) applicable to the analysis of whatever problems where eqs. (2) and (4) are applicable. The new analytical method to solve the nonlinear problems of the Brownian motion was ...
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Simulation of the Single Uphill and Osmotic Diffusion
... Simulated results have shown in single component systems, when thermal velocity in low concentration region is greater than that in high concentration region, uphill and osmotic diffusion can take place. Results ...
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Turbulent mixing simulation via a quantum algorithm
... ψ = the composition domain of Fickian scalars φ σ2 = the variance of random variables σi = the Pauli matrices, i = 0, x, y, z µ ˜4 = the most accurate estimate of µ4 obtained, used as a [r] ...
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<p>Magnetic Resonance Diffusion Kurtosis Imaging versus Diffusion-Weighted Imaging in Evaluating the Pathological Grade of Hepatocellular Carcinoma</p>
... Methods: From December 2015 to January 2017, consecutive patients suspected of having hepatocellular carcinoma (HCC) without prior treatment were prospectively enrolled in this study. MRI examinations were performed ...
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Diffusion in General Physics and the Theory of the Convective Diffusion
... Then, let us introduce the statistical weight of i component and will sum up interactions of all pairs of components. As a result, we will obtain (7). According to (7), Onsager’s model diffusion in the ...
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