Andrzej Bryś

Andrzej Bryś
Warsaw University of Life Sciences - SGGW | SGGW

About

42
Publications
9,131
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223
Citations
Citations since 2017
34 Research Items
203 Citations
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2017201820192020202120222023010203040
2017201820192020202120222023010203040

Publications

Publications (42)
Article
Full-text available
The aim of this research was to evaluate the quality and oxidative stability of enzymatically interesterified plant oil blends. The model plant oil blends consisted of tomato seed oil and coconut oil, which were applied to enzymatic interesterification in the presence of a microbial lipase. To obtain quality characteristics of the enzymatically int...
Article
Full-text available
The aim of this study was to assess the possibilities to use brewer’s spent grains (BSGs) left over from beer production for energy purposes, and to determine its calorific value and chemical composition. The research materials were samples of wet spent grain from a brewery in Poland. Three samples, that are different in ingredient composition, wer...
Book
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The monograph covers current research in the field of energy potential of biomass. The issues of world scientific and research trends in the field of biomass energy and the current state of bioenergy in the EU and Ukraine in the context of opportunities to increase the volume and improve the properties of raw materials for renewable energy based on...
Article
Full-text available
This paper discusses our attempt to generate substitutes for human breast milk fat through the interesterification of mixtures composed of lard and hemp (Cannabis sativa) seed oil. The interesterification was run at 60 °C for 2, 4, and 6 h in the presence of Lipozyme RM IM preparation containing a lipase specific for the cleavage of sn-1,3 ester bo...
Article
Full-text available
Determination of the mass diffusion coefficient for dried, inhomogeneous material is difficult as it depends on the drying agent temperature and the moisture content and physical structure of the material. The paper presents a method for efficient determination of the water diffusion coefficient for wood solid cuboids dried using convective drying...
Article
Full-text available
Drying of spruce, beech, willow, and alder sawdust was examined in a laboratory type dryer. The effect of drying air temperature T (25, 60, and 80 °C) and airflow velocity v (0.01, 0.15, and 1.5 m/s) was investigated. The obtained results demonstrated that drying air temperature and airflow velocity have impacts on the drying of sawdust. The experi...
Article
Full-text available
The development of infant milk fat similar in its structure and composition to that present in human milk receives a considerable amount of attention and has become a challenge for the world’s food industry. The aim of this work was an attempt to obtain structured lipids resembling human milk fat (HMF) by modifying mixtures of lard (L) and rapeseed...
Article
Full-text available
This study aims to compare the quality of fat extracted from different priced dry pet food for adult cats through classical and instrumental methods: pressure differential scanning calorimetry (PDSC), Fourier transform infrared spectroscopy (FT-IR) or gas chromatography (GC). Fat extracted from pet food was examined for induction time (IT), fatty a...
Book
Full-text available
The main tasks that form the prerequisites for efficient use of wind energy for electricity supply to agricultural enterprises are identified. Scientific and methodological principles of wind power plants configuration optimization and parametric series of wind turbines for agriculture are developed on the basis of computer simulation. Criteria for...
Article
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Growing demand for energy and care about natural environment is the motivation to find alternative sources of energy. One of them is biomass from cherry and morello cherry stones, which is food processing industry waste. Stones have fairly good physical properties regarding material for combustion. Cherry and morello cherry crop in Poland is at the...
Article
Full-text available
The goal of the study was to analyse the efficiency of two existing photovoltaic micro-installations with the power of approx. 40 kWp. The main factor differing the two installations being analysed was the arrangement of modules in relation to the sides of the world, one is south-west and the other is east-west. The total yield of electrical energy...
Article
Full-text available
Coffee is one of the most popular beverages worldwide. The goal of this work is an estimation of the qualities of waste coffee grounds as a material used in biofuel production. There were selected two most popular coffee beans mixtures: arabica and arabica with robusta, as well as chocolate-flavoured coffee and green coffee (unroasted coffee beans)...
Article
Full-text available
Human milk fat plays an essential role as the source of energy and cell function regulator; therefore, the preservation of unique human milk donors’ lipid composition is of fundamental importance. To compare the effects of high pressure processing (HPP) and holder pasteurization on lipidome, human milk was processed at 62.5 °C for 30 min and at fiv...
Article
Full-text available
The purpose of the present work was to characterize oil extracted from roasted hemp seeds using the PDSC and FTIR techniques. Roasting was conducted in a laboratory convective dryer. DSC method was used for the determination of the oxidative stability of oil extracted from hemp seeds. Pressure differential scanning calorimetry experiments were carr...
Article
Full-text available
The central point of current investigations was the first time ever synthesis of modern substitutes of human milk fat followed by versatile evaluation of their oxidative properties. The enzymatic interesterification conducted at 70°C for 2, 4, and 6 hours, respectively, with milk thistle oil and lard blend as starting reactants was catalyzed by 1,3...
Article
Full-text available
The aim of this study was the analytical evaluations of human milk fat substitutes (HMFS) synthesized via enzymatic interesterification of lard and milk thistle oil mixtures by a immobilized commercial sn-1,3-specific lipase, using calorimetric and chromatographic methods. The mixtures of lard and milk thistle oil at mass ratio 6:4 and 8:2 were int...
Article
Full-text available
Drying behaviour of spruce (Picea abies (L.) H. Karst.), beech (Fagus sylvatica L.), willow (Salix alba L.), and alder (Alnus glutinosa (L.) Gaertn.) particles was investigated in a convective dryer at constant air velocity of 0.01 m/s and at the drying air temperature of 25, 60, 80, and 150 °C. The results of the experiments have shown that the wo...
Article
Full-text available
Drying behaviour of sawdust mixture was investigated in a convective dryer at 0.01 m/s and 25, 60, and 150°C air temperature. Sawdust mixture (60% of spruce and 40% of the second ingredient: beech, willow, ash, alder) and sawdust of spruce, beech, willow, alder and ash was used in the drying experiments. The sawdust mixture drying was affected by t...
Article
W artykule opisano proces wykorzystania słomy do celów energetycznych, sposoby jej pozyskiwania, magazynowania, transportu oraz spalania. Dokonano krótkiego porównania z innymi alternatywnymi źródłami wytwarzania energii. Podkreślono aspekt ekologiczny stosowania tego typu nośnika energii.
Article
Full-text available
The wood biomass obtained from four tree species: spruce, beech, willow and alder was studied. Sawdust obtained by sawing of wood was dried in a convective dryer at 80 °C, without drying-agent flow. The measurements taken with oven-drying method covered determination of initial moisture and its detailed changes during entire drying process. Both DS...
Article
W artykule przedstawiono charakterystykę odnawialnych źródeł energii z uwzględnieniem biomasy. Celem pracy jest przeprowadzenie badań konwekcyjnego suszenia wierzby energetycznej w 5 warunkach o różnej temperaturze 80ºC, 70ºC, 60ºC, 50ºC oraz 40ºC. Przedmiotem badań były zrębki różnej wielkości 3-letniej wierzby energetycznej. Wykazano wpływ wielko...
Article
Full-text available
The aim of this paper was the analytical evaluation of human milk fat substitutes (HMFS) by the calorimetric and spectroscopic methods. The HMFS were obtained by enzymatic interesterification of blend of lard or milk fat with rapeseed oil and concentrate of fish oil. The enzymatic reactions were carried out at 60, 70, and 80 °C for 2 h. A commercia...
Article
Full-text available
The following study compares the parameters of roasting (100-160°C, 10-60 min) at a constant air flow rate on the basis of changes in water content and the colour development of the hazelnut kernels. The scope of this paper included drying curves preparation, moisture content determination and colour of kernel surface analysis in CIE L*, a*, b* sys...
Article
In the paper the properties of structured lipids synthesized by enzymatic interesterification of blend of lard and rapeseed oil with n-3 fatty acids in form their concentrates were reported. A commercially immobilized 1,3-specific lipase was used as a biocatalyst. After interesterification triacylglycerols were purified by column chromatography. Th...
Article
Full-text available
The aim of this paper was to assess the oxidative stability of structured lipids synthesized by enzymatic interesterification of a blend of lard and rapeseed oil with concentrates of n − 3 fatty acids. Differential scanning calorimetry was used to evaluate the oxidation induction time of interesterified fats as a parameter assessing resistance of t...

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