Determination of effective diffusion coefficient and interfacial mass transfer coefficient of bovine serum albumin (BSA) adsorption into porous polyethylene membrane by microscope FTIR-mapping study

2004 ◽  
Vol 59 (21) ◽  
pp. 4569-4574 ◽  
Author(s):  
Tongwen Xu ◽  
Rongqiang Fu
Keyword(s):  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Bovine Serum Albumin ◽  
Effective Diffusion Coefficient ◽  
Effective Diffusion ◽  
Mapping Study ◽  
Porous Polyethylene ◽  
Interfacial Mass Transfer ◽  
Bsa Adsorption

A method for determination of the effective diffusion coefficient and sputtering rate during plasma diffusion treatment

1998 ◽  
Vol 99 (3) ◽  
pp. 234-241 ◽  
Author(s):  
V.I. Dimitrov ◽  
J. D'Haen ◽  
G. Knuyt ◽  
C. Quaeyhaegens ◽  
L.M. Stals
Keyword(s):  
Diffusion Coefficient ◽  
Effective Diffusion Coefficient ◽  
Effective Diffusion ◽  
Diffusion Treatment ◽  
Plasma Diffusion

Determination of the effective diffusion coefficient for 125I− in Beishan granite

2008 ◽  
Vol 96 (2) ◽  
Author(s):  
C. J. Lu ◽  
C. L. Liu ◽  
T. Chen ◽  
J. Wang ◽  
X. Y. Wang ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Effective Diffusion Coefficient ◽  
Effective Diffusion ◽  
Beishan Granite

scholarly journals Heat and mass transfer coefficients and modeling of infrared drying of banana slices

Revista CERES ◽  
2017 ◽  
Vol 64 (5) ◽  
pp. 457-464 ◽  
Author(s):  
Fernanda Machado Baptestini ◽  
Paulo Cesar Corrêa ◽  
Gabriel Henrique Horta de Oliveira ◽  
Fernando Mendes Botelho ◽  
Ana Paula Lelis Rodrigues de Oliveira
Keyword(s):  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Shelf Life ◽  
Heat And Mass Transfer ◽  
Effective Diffusion Coefficient ◽  
Effective Diffusion ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Infrared Drying ◽  
Ripening Stages

ABSTRACT Banana is one of the most consumed fruits in the world, having a large part of its production performed in tropical countries. This product possesses a wide range of vitamins and minerals, being an important component of the alimentation worldwide. However, the shelf life of bananas is short, thus requiring procedures to prevent the quality loss and increase the shelf life. One of these procedures widely used is drying. This work aimed to study the infrared drying process of banana slices (cv. Prata) and determine the heat and mass transfer coefficients of this process. In addition, effective diffusion coefficient and relationship between ripening stages of banana and drying were obtained. Banana slices at four different ripening stages were dried using a dryer with infrared heating source with four different temperatures (65, 75, 85, and 95 ºC). Midilli model was the one that best represented infrared drying of banana slices. Heat and mass transfer coefficients varied, respectively, between 46.84 and 70.54 W m-2 K-1 and 0.040 to 0.0632 m s-1 for temperature range, at the different ripening stages. Effective diffusion coefficient ranged from 1.96 to 3.59 × 10-15 m² s-1. Activation energy encountered were 16.392, 29.531, 23.194, and 25.206 kJ mol-1 for 2nd, 3rd, 5th, and 7th ripening stages, respectively. Ripening stages did not affect the infrared drying of bananas.

Study on the diffusion coefficients for ammonia nitrogen and nitrite and nitrate in PVA gels

2016 ◽  
Vol 74 (8) ◽  
pp. 1773-1779 ◽  
Author(s):  
Hong Yang ◽  
Qingkun Guan
Keyword(s):  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Effective Diffusion Coefficient ◽  
Effective Diffusion ◽  
Polynomial Equation ◽  
Ammonia Nitrogen ◽  
Test Device ◽  
Surface Method ◽  
Cubic Polynomial ◽  
Addition Amount

In order to quantify the proliferation of polyvinyl alcohol (PVA) gels in a matrix and optimize the performance of mass transfer, activated carbon (AC) and CaCO3 were selected as adding materials in this experiment. For the performance of mass transfer, the optimal conditions were analyzed using response surface method (RSM) considering the inter-correlated effects of the amount of AC and CaCO3. For RSM, 13 trials resulted in a partial cubic polynomial equation, which best predicted the amount of residual debris after homogenization. The results of the study show that the effective diffusion coefficient test device can analysis the diffusion rate nitrogen, nitrite and nitrate within the PVA gels quantitatively; adding appropriate amounts of AC and CaCO3 in the biological active filter can improve the performance of mass transfer effectively; the maximum effective diffusion coefficient of nitrogen and nitrite and nitrate in the packing were 1.3637 × 10−9 and 1.0850 × 10−9 and 1.0199 × 10−9 m2/s, respectively, at optimal addition amount.

Accurate analytical model for determination of effective diffusion coefficient of polymer electrolyte fuel cells by designing compact Loschmidt cells

Fuel ◽  
2017 ◽  
Vol 199 ◽  
pp. 551-561 ◽  
Author(s):  
Mojtaba Izadmehr ◽  
Mahdi Abbasi ◽  
Mehrshad Mansouri ◽  
Alireza Kazemi ◽  
Ali Nakhaee ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Analytical Model ◽  
Effective Diffusion Coefficient ◽  
Effective Diffusion ◽  
Polymer Electrolyte Fuel Cells
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