The experimental assessment and computer modeling of the water vapor adsorption isotherms roasted specialty coffee is addressed in this study. Thus, both beans ground medium (850 μm) fine (600 particle sizes were analyzed over a range activities between 0.1 0.9 at temperatures 25, 35, 45 °C. determined using dynamic dew point (DDI) method. was order to describe influence activity temperature on...

Given a graph G = (V ,E), a subgraph G′ = (V ,H), H ⊆ E is a k-spanner of G if for any pair of vertices u,w ∈ V it satisfies dH (u,w) kdG(u,w). The basic k-spanner problem is to find a k-spanner of a given graph G with the smallest possible number of edges. This paper considers approximation algorithms for this and some related problems for k > 2, known to be (2log 1− n)inapproximable. The basi...

Can the sorption mechanism be proven by fitting an isotherm model to experiment? Such a question arises because (i) multiple models, with different assumptions on mechanisms, often fit experimental equally well, (ii) some models [such as Brunauer–Emmett–Teller (BET) and Guggenheim–Anderson–de Boer (GAB)] isotherms that do not satisfy underlying of model, (iii) (such Oswin Peleg) are empirical e...

Ginger has a high moisture content, which makes it highly susceptible to spoilage. Therefore, the shelf life can be extended through drying. In drying process, osmotic dehydration is applied as pre-treatment due its simple operation and energy-saving process for removing from food. However, large solute gain during become major challenge of this negative impact on final product. The edible coat...

BACKGROUND Irreversible electroporation (IRE) is a minimally invasive tissue ablation technique which utilizes electric pulses delivered by electrodes to a targeted area of tissue to produce high amplitude electric fields, thus inducing irreversible damage to the cell membrane lipid bilayer. An important application of this technique is for cancer tissue ablation. Mathematical modelling is cons...

1. Zadra G, Asselta R, Tenchini ML, Castaman G, Seligsohn U, Mannucci PM, et al. Simultaneous genotyping of coagulation factor XI type II and type III mutations by multiplex real-time polymerase chain reaction to determine their prevalence in healthy and factor XI-deficient Italians. Haematologica 2008; 93:715-21. 2. Rodriguez-Mari A, Diaz-Font A, Chabas A, Pastores GM, Grinberg D, Vilageliu L....

Todd R. Farrell, PhD I am writing to express a concern that my colleagues from previous laboratories at Northwestern University/Rehabilitation Institute of Chicago (RIC) and I have shared for a number of years related to multifunctional prosthesis control. Previous investigations have used a variety of analysis window attributes for their multifunctional prosthesis controllers [1–8]. Researcher...

We study LP-rounding approximation algorithms for metric uncapacitated facility-location problems. We first give a new analysis for the algorithm of Chudak and Shmoys, which differs from the analysis of Byrka and Aardal in that now we do not need any bound based on the solution to the dual LP program. Besides obtaining the optimal bifactor approximation as do Byrka and Aardal, we can now also s...

Knowledge of the state water balance agro-food products is an essential step in drying or storage operations for preservation. Our study made it possible to determine thermodynamic parameters which influence conditions fresh tomatoes grown south Benin; and predict its hygroscopic behavior during post-harvest storage. The desorption isotherms obtained at 40℃, 50℃ 60℃, by static gravimetric metho...

This study aimed to determine the effects of osmotic dehydration on kinetics hot air drying apricot halves under conditions that were similar industrial ones. The process was performed in a sucrose solution at 40 and 60 °C concentrations 50% 65%. As expected increased temperatures resulted water loss, solid gain shrinkage. well described by Peleg model. effective diffusivity 5.50–7.387 × 10−9 m...