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... The aim of this study was to implement ADM1xp model to simulate behavior of anaerobic co-digestion of maize silage and cattle manure. The accuracy of ADM1xp has been assessed against experimental data of anaerobic digestion, performed at OLR = 2.1 gVS dm⁻³·d⁻¹ and HRT = 45d. Due to the high number of parameters in ADM1xp, it was necessary to develop a customized procedure limiting the range of par ...
... AIMS: The assessment of the bacterial viability of chlorine‐ and quaternary ammonium compounds (QACs)‐treated Lactobacillus cells by culture‐dependent and ‐independent methods. METHODS AND RESULTS: Lactobacillus isolates (Lactobacillus plantarum G1, Lactobacillus plantarum B1, Lactobacillus brevis S1 and Lactobacillus paracasei W1) in biofilm and planktonic cell suspensions were treated with chlor ...
... The aim of this study was to investigate the course of glycogenolysis, ATP breakdown and fragmentation of myofibrillar proteins in the semitendinosus muscle of a progeny of Limousin×Holstein-Friesian (LMₓ) and Charolaise×Holstein-Friesian (CHₓ) (bulls and steers) and to describe the changes in the above parameters over time and its relationship with beef texture. The hypothesis that beef from bull ...
... We investigated biofilm formation by six lactobacilli isolates and tested the resistance of biofilm and planktonic Lactobacillus plantarum B1 and Lactobacillus paracasei W1 to ethanol (ET) and acetic acid (AA). The viability of both isolates was considerably affected by ET, with a higher reduction observed in the planktonic cells, whereas AA was harmful only to L. paracasei W1. Cells that had inta ...
... A thin-wall steel can was filled with grain of barley and submerged into a water immersion unit containing hot water. The water immersion experiments and an inverse modeling method were used to derive the bulk thermal conductivity of barley (var. Mauritia) dependent on the bulk temperature and grain moisture content. Arrhenius-type equation was applied to describe temperature and moisture content ...
antioxidant activity; beta-carotene; high performance liquid chromatography; high pressure treatment; lipophilicity; lutein; lycopene; tomato puree; tomatoes; voltammetry
Abstract:
... The effect of high hydrostatic pressure (HHP) (450–550–650 MPa/5–10–15 min) on the carotenoid profile of purées obtained from commercial tomato varieties (Maliniak, Cerise, Black Prince and Lima) was investigated. The carotenoids profile was analysed using high performance liquid chromatography (HPLC‐DAD). Photochemiluminescence (PCLACL), ferric‐reducing antioxidant power (FRAP) and cyclic voltamm ...
... The effect of cooking on the quality of turkey meat heated by steam at different temperatures and saturation levels, and then vacuum stored at 3 °C for 28 days, was studied. The smallest cooking loss was observed in meat cooked at 220 °C and when the highest air steam saturation was applied. The rate of lipid oxidation as a result of cooking and storage was the lowest in sample cooked at 180 °C an ...
Ireneusz Białobrzewski, et al. ; Ryszard Myhan; Mirosława Karpińska‐Tymoszczyk; Marzena Danowska‐Oziewicz; Marek Markowski; Katarzyna Majewska; Show all 6 Authors
air; breast meat; lipid content; mathematical models; mechanical properties; modulus of elasticity; protein content; relative humidity; steam; turkeys; water content
Abstract:
... The effect of relative humidity (RH) of air on the mechanical properties of roasted turkey breast was studied using a rheological model. The raw turkey breast with a moisture content of ca. 75%, protein content of ca. 24% and fat content of ca. 1% was roasted in a convection steam oven at 180C and five RH levels (0, 20, 50, 70 and 90%). The elastic modulus decreased, whereas the flow consistency i ...
... The present study was designed to determine the influence of fat reduction and storage time on changes in the viscoelastic properties and, separately, in the viscous and elastic properties of Dutch-type cheese, based on the results of a stress-relaxation test. Another aim was to compare two models, i.e. (I) the generalized Maxwell model and (II) the semi-empirical Maxwell model, which describe the ...
... Selected engineering properties of seeds of four red clover varieties were studied. The seeds of diploid and tetraploid forms were statistically different in terms of true and bulk density, porosity, volume, 1000 seed weight, equivalent diameter and yellowness index. The volume, 1000 seed weight and equivalent diameter were found to be statistically higher for tetraploid than for diploid forms. Th ...
... The objective of this study was to determine the usefulness of live animal measurements in estimating the intramuscular fat (IMF) content of m. longissimus thoracis (MLT) in beef cattle. Live animal measurements were performed in young crossbred bulls (96) and steers (59), the offspring of Holstein-Friesian (HF) cows and beef bulls (Limousin, Hereford and Charolais), at the end of the fattening pe ...
... The impact of drying two spring barley cultivars (Mauritia and Prestige) in a spouted-bed and in infrared radiation (IR) dryers on grain dimensions, colour, pigment content, vitality and malt quality was investigated. The results indicate that the investigated drying methods led to kernel dimension changes. Kernel shrinkage was typical of spouted bed drying, while kernel expansion was observed aft ...
... The present study extended the Anaerobic Digestion Model No. 1 (ADM1) to simulate co-digestion of silages with pig manure and thin stillage, pig manure and glycerine phase, or thin stillage and glycerine phase under mesophilic conditions. New state variables were added, including glycerol, lactate, valerate and iso-valerate. Furthermore, the model was extended to include both the rapidly and slowl ...
water content; barley; fluidized beds; drying temperature; water activity; diffusivity; mass flow
Abstract:
... A study was performed to observe the drying kinetics of barley dried in a spouted-bed drier and to study the influence of the shape of a kernel assumed in the model on the estimated value of effective moisture diffusivity. Significant differences were observed in the moisture diffusivities of barley between temperatures applied and it ranged from 1.39×10⁻¹⁰ m²/s at 33°C for ellipsoidal geometry to ...
... Biofilms of Lactobacillus plantarum and Listeria innocua were grown under single‐ and mixed‐culture conditions in a bioreactor with either half‐strength brain heart infusion (BHI) medium or BHI medium with sodium dichloroisocyanurate (150 ppm) for 24 hr. A quantitative approach using plate counts and fluorescence in situ hybridization (FISH) was applied, representing the culturable and viable cell ...
... A mathematical model integrating 11 first-order differential equations describing the dynamics of the aerobic composting process of sewage sludge was proposed. The model incorporates two microbial groups (mesophiles and thermophiles) characterized by different capacities of heat generation. Microbial growth rates, heat and mass transfer and degradation kinetics of the sewage sludge containing stra ...
... The aim of this study was to determine the kinetics of the survival of the test strain of Staphylococcus aureus in the product investigated. Yogurt samples were contaminated with S. aureus to an initial level of 10³-10⁴ cfu/g. The samples were then stored at four temperatures: 4, 6, 20, 22°C. During storage, the number of S. aureus forming colonies in a gram of yogurt was determined every two hour ...
... The influence of selected geometric bioreactor parameters on the performance of continuous-flow-type low-temperature biogas production from biomass by anaerobic digestion was studied to determine the optimal geometric parameters of the digester. A continuous-mode two-stage bioreactor was applied to produce biogas by anaerobic digestion using model dairy wastewater sludge as substrate. The Monod ap ...
... Invasions of gastrointestinal nematodes in dairy cows may affect animals productivity. The most frequently detected internal parasite of dairy cattle is Ostertagia ostertagi. The objective of this study was to determine O. ostertagi invasion extensiveness in selected herds of dairy cattle, with special consideration to cows being in the first lactation, and to analyze the milk yield and contents o ...
Ireneusz Białobrzewski, et al. ; Cezary Purwin; Maciej Starczewski; Marta Borsuk; Zenon Nogalski; Paulina M. Opyd; Magdalena Mazur-Kuśnirek; Show all 7 Authors
... Different harvesting and preservation methods of Virginia fanpetals herbage were evaluated, based on the chemical composition and digestible organic matter (OM) content (D-value) of silage fed to adult sheep, the intake and digestibility of silage, and the performance of young cattle. The following harvesting methods were compared: direct-cut harvesting with a precision-cut forage harvester (DC), ...