The wood biomass obtained from four tree species: spruce, beech, willow and alder was studied. Sawdust by sawing of dried in a convective dryer at 80 °C, without drying-agent flow. measurements taken with oven-drying method covered determination initial moisture its detailed changes during entire drying process. Both DSC curves spectral data infrared spectra registered the classic MIR range were also used to monitor change water content studied samples within Results suggest that can be...

Summary Drying behaviour of apple particles was investigated in a laboratory type dryer. The effect drying air temperature, airflow velocity, initial height layer, shape and size on the dehydration characteristics apples investigated. Increase temperature increase velocity caused decrease time an rate. layer sample thickness cubes shorter their rate higher than for slices. experimental data obtained were fitted to semi‐theoretical, empirical theoretical models. accuracies models measured...

Abstract An HPLC method using C18‐modified silica as stationary phase has been developed for environmental trace analysis of nine (fluoro)quinolones. Detection is done by fluorescence measurement or MS the modes SIM and selected reaction monitoring (SRM). Best separation achieved with a gradient consisting 50 mM formic acid methanol, which fully compatible coupling. LOQs (S/N 10) detection are between 10 60 μg/L, depending on analyte. (SIM SRM) yields that better factor at least an order...

In this study, an efficient optimisation method by combining response surface methodology (RSM) and genetic algorithm (GA) is introduced to find the optimal topology of artificial neural networks (ANNs) for predicting colour changes in rehydrated apple cubes. A multi-layered feed-forward backpropagation ANN model algorithms was developed correlate one output (colour change) four input variables (drying air temperature, drying velocity, temperature distilled water rehydration time)....

Technologies involved in roasting coffee beans, as well the methods used to prepare infusions, vary according culture, and contribute differences concentration of elements drink.Concentrations six elements: manganese (Mn), cobalt (Co), nickel (Ni), chrome (Cr), silver (Ag) lead (Pb) were investigated infusions from eleven samples coffee, roasted purchased four countries: Bosnia Herzegovina, Brazil, Lebanon Poland. Metal concentrations determined using an induction coupled plasma technique...

A procedure based on HPLC and mass spectrometric detection has been developed for screening of residues the illicit drug amphetamine in sewage sludge. Sample pretreatment consisted extraction by 50 mM formic acid methanol (80 : 20 v/v), followed adjustment pH to 10 preconcentration SPE at poly(divinylbenzene)-N-vinylpyrrolidone. separation extract was done a C18 RP with mixture v/v) as mobile phase. The spectrometer operated MS2 MS3 mode using transition from m/z 136 119 91. Due complex...

The aim of the study was to estimate optimal parameters apple drying and rehydration temperature obtained dried apple. Conducting both processes under such conditions is aimed at restoring rehydrated raw material properties. allow process be carried out in a short time (DT) low energy consumption (EC). effect air velocity (vd), (Td), characteristic dimension (CD), (Tr) on quality studied. Quality as: color change (CC), mass gain ratio (MG), solid loss (SL), volume (VG) together with DT EC...

Some dehydrated products must be rehydrated before consumption or further industry processing. Optimization of the rehydration process needs mathematical models process. Despite widespread use computers and their associated software, empirical equations are still widely used in view simplicity ease computation. The description kinetics mass gain, volume increase, dry matter loss, moisture content increase changes indices during dried red beets was investigated. effects drying air temperature...

The Biot number informs researchers about the controlling mechanisms employed for heat or mass transfer during considered process. coefficients (and coefficients) are usually determined experimentally based on direct measurements of (heat) fluxes correlation equations. This paper presents method estimation. For estimation in drying process, multi-objective genetic algorithm (MOGA) was developed. simultaneous minimization mean absolute error (MAE) and root square (RMSE) maximization...

The effect of dried apple varieties on their rehydration characteristics was investigated. Four apples, Champion, Cortland, Grey Reinette and Ligol, were taken into consideration. Rehydration properties color apples In order to examine the influence variety its properties, process modeled. model parameters obtained for investigated compared. Apple cubes in a tunnel dryer (air temperature 60 °C air velocity 2 m/s) next rehydrated distilled water at temperature: 20, 45 70 °C. Mass, dry matter...

Drying of spruce, beech, willow, and alder sawdust was examined in a laboratory type dryer. The effect drying air temperature T (25, 60, 80 °C) airflow velocity v (0.01, 0.15, 1.5 m/s) investigated. obtained results demonstrated that have impacts on the sawdust. experimental dehydration data were fitted to theoretical, semi-theoretical, empirical thin-layer models. accuracies models estimated using correlation coefficient (R), root mean square error (RMSE), reduced chi-square (χ2). All...

The accuracy of the available from literature models for dew point temperature determination was compared. proposal modelling using artificial neural networks also given. experimental data were taken psychrometric tables. accuracies measured mean bias error MBE, root square RMSE, correlation coefficient R, and reduced chi-square χ2. Model M3, especially with constants A=237, B=7.5, gave best results in determining (MBE: -0.0229 – 0.0038 K, RMSE: 0.1259 0.1286 R=0.9999, χ2: 0.0159 0.0166 K2)....

The School Meal Index-Lunch Evaluation (SMI-LE) has been developed to assess school lunch quality. aim of this study was use the SMI-LE index for a comparative analysis quality meals planned in primary schools Warsaw and Zagreb. used 4-week both cities. collected menus were analyzed terms overall as an average points over 4 weeks individual categories. According index, lunches rated on 64 62 out total 140 points, Zagreb, respectively. majority Zagreb classified medium quality, while Warsaw,...

1. Aghbashlo M., Kianmehr M.H., Arabhosseini A., and Nazghelichi T., 2011. Modelling the carrot thin-layer drying in a semi-industrial continuous band dryer. Czech J. Food Sci., 29(5), 528-538. https://doi.org/10.17221/158/2.... CrossRef Google Scholar

The effect of convective drying temperature (Td), air velocity (v), rehydration (Tr), and kind rehydrating medium (pH) was studied on the following apple quality parameters: water absorption capacity (WAC), volume ratio (VR) color difference (CD). To model, simulate, optimize parameters processes hybrid methods artificial neural network multiobjective genetic algorithm (MOGA) were developed. MOGA adapted to tissue, where simultaneous minimization CD VR maximization WAC considered. range...