Tomasz Jakubowski

University of Agriculure in Cracov · WIPiE

The article presents the results of research on the range of the impact of a cooling facility on the surrounding ground. An analysis of the heat exchange with the ground and through the building partitions was carried out. The analysis was carried out on the basis of the results of actual field tests carried out throughout the measurement year. The...

Use of a solar tracker and concentrator of solar radiation flow is distinguished among the most efficient ways to improve electric efficiency of a photovoltaic system. The aim of the research is to detect the effect of each of the ways to improve efficiency of photovoltaic system by comparing installations of different structure (stationary oriente...

The work uses common correlations of solar power engineering and spherical astronomy for measuring of orientation efficiency of a tracking surface. The presented formulas for calculation are supplied with the appropriate schemes of illumination. The research gives hour graphics, which depicts a dependence of the cosines of the angle of incidence of...

The application of sewage sludge as a fertilizer in podzols soil ambiguously affects the peculiarities of the accumulation of certain chemical elements in various organs of Jerusalem artichoke plants. Experimental factors in the study were different doses of sewage sludge from sludge maps of sewage treatment plants and its compost with cereal straw...

Lakes are the most important freshwater resources for humans. It is stated that together with population growth, unplanned urbanization, excessive water consumption, industrialization, and unconscious irrigation, global climate change causes changes in the water levels and volumes of lakes. Lake Eğirdir in Turkey, which is important in terms of dri...

Amongst the surface treatment technologies to emerge in the last few decades, UV-C radiation surface treatment is widely used in food process industries for the purpose of shelf life elongation, bacterial inactivation, and stimulation. However, the short wave application is highly dose-dependent and induces different properties of the product durin...

Wpływ stymulacji zmiennym polem magnetycznym nasion pszenicy o różnym przeznaczeniu technologicznym Streszczenie. Celem pracy było określenie reakcji nasion pszenicy (Triticum aestivum L.) o różnym przeznaczeniu technologicznym na zmienne pole magnetyczne. W doświadczeniu wykorzystano stanowisko z układem RC OSCILLATOR TYPE G502 generującym sygnały...

An environmentally friendly non-thermal DC plasma reduction route was adopted to reduce Ag+ ions at the plasma–liquid interface into silver nanoparticles (AgNPs) under statistically optimized conditions for biological and photocatalytic applications. The efficiency and reactivity of AgNPs were improved by statistically optimizing the reaction param...

Celem pracy było określenie wpływu mikrofal na ciemnienie surowego miąższu bulw ziemniaka. Badaniami objęto 6 bardzo wczesnych odmian ziemniaka (Arielle, Denar, Felka Bona, Lord, Rosara i Velox), które przechowywano przez okres 7 miesięcy. Do napromieniania bulw ziemniaka wykorzystano generator wytwarzający mikrofale o częstotliwości 2,45 GHz. Ocen...

W pracy zaprezentowano stanowisko do naświetlania bulw ziemniaka promieniami UVC. Stanowisko (komora) zostanie wykorzystane w badaniu skuteczności oddziaływania promieniowania UVC na rozwój rizoktoniozy bulw ziemniaka. We wnętrzu komory wykonano pomiary natężenia oświetlenia oraz temperatury i wilgotności względnej. Zmienność badanych parametrów ks...

The research was carried out on the territory of c. Tsenzhiv of Yamnytsya territorial community of Ivano-Frankivsk region on sod-podzolic degraded soils according to generally accepted research methods. The productivity of miscanthus and switchgrass depends on the biometric indicators of plants, namely the height of plants and the number of stems....

This article presents methods and results of experimental research to determine the power consumed when driving the working bodies of the straw bedding mobile spreader to cover cow stalls (boxes). Analysis of the design and mode parameters of the rotary finger working body influence on the energy consumption of the bedding material spreading proces...

This manuscript presents selected analytical methods for starch content determination in plant materials. The presentation includes tools and equipment needed to apply a selected method and method accuracy in determinations of starch content and parameters. An overview of these methods may be useful while designing studies focused on starch content...

This study aimed to determine the response of potato starch granules to microwave radiation indicated by changes in starch granule size. Laboratory analyses were carried out in 2019 with tubers of an early edible potato cultivar Innovator. The tubers were irradiated for 10-600 s using a 100 W generator producing microwaves having a frequency of 2.4...

The goal of the paper is to evaluate the suitability of the 2.45 GHz microwave radiation in reducing the potato tubers storage losses. The experiment was conducted for three consecutive storage seasons on six edible potato varieties. It was determined that reaction of potato tubers to microwave radiation defined by processes taking place during the...

The case study to determine the peculiarities of Miscanthus giganteus aboveground biomass formation depending on sewage sludge and composts rate carried out in the Precarpathian region of Ivano- Frankivsk province on sod-podzolic soils. The largest area of the leaf surface of miscanthus is formed in the trials where fresh sewage sludge was applied...

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Color evaluation, using its numerous parameters, was applied to assess qualitative changes of products resulting from the use of specific technological treatment. The study investigates the possibility of using the CIE (Comission Internationale de l'Eclairage) L*a*b* (components describe color: L - luminance, a - green to magenta color, b - blue to...

This study aims to determine the effect of raw potato tubers’ exposure to UV-C radiation and semi-products soaking in water on the content of acrylamide in the dry matter of French fries. The French fries were prepared from tubers of the Innovator variety of potato (Solanum tuberosum L.). Acrylamide contents were determined by HPLC-UV/Vis on a C-18...

The aim of the experiment was to determine the impact of UV-C stimulation of tubers, immersion of potato sticks in water, and a frying fat type on the content of fat in dry mass of French fries. Tests were carried out on Innovator tubers which is one of the most often used cultivator in production of French fries by the European and Polish companie...

The purpose of the study was to establish whether UV-C radiation applied to potato tubers prior to their storage affected their natural losses over a long period of time. A custom-built UV-C radiation stand constructed for the purpose of this experiment was equipped with a UV-C NBV15 radiator generating a 253.7 nm long wave with power density of 80...

The purpose of the experiment was to assess the effect of application of zinc ammonium acetate (ZAA) on yielding, morphological features and on selected vegetation indices of timothy cv. ‘Owacja’ cultivated for seeds. Zinc ammonium acetate that has a biostimulatory effect was used foliar in the carried out experiment. The experiment was conducted i...

Colour evaluation, using its numerous parameters, is applied to assess qualitative changes of products resulting from the use of specific technological treatment. The study investigates the possibility of using the CIE L*a*b* method to determine selected colour coefficients of fried potato products. Statistical analysis of the results was performed...

The purpose of the paper was to determine the impact of UV-C irradiation of seed potatoes on the formation of tuber defects in the progeny crop. The field experiment was carried out in 2016-2018, and the object of research was potato plants of the Vineta, Lord and Owacja varieties. Different heights of the UV-C radiator above the chamber bottom (40...

Assessment of the colour with the use of many parameters is used with reference to evaluation of the quality changes of products resulting from application of specific technological treatments. The paper investigates the effect of relations between parameters of irradiation of potato bulbs with UVC on selected coefficients of assessment of the colo...

Progress of composting process depends on properties of feedstocks and conditions of decomposition. Factors influencing this process include most of all temperature of composting material, air temperature, feedstock humidity and structure, carbon-to-nitrogen ratio (C/N) and organic matter content in feedstocks. The aim of the present study was to e...

The article presents the possibilities of using domain-time reflectometry (TDR) to determine the moisture content of waste. The TDR method consists in measuring the time of electromagnetic pulse transmission and reflection from the obstacle back to the source point. The impulse is a step signal of voltage. The reflected signal contains information...

This paper presents a system for the control and recording of physical parameters inside a chamber for UV-C irradiating of biological material. The system was based on the HOBO U23-002 temperature and humidity recorder equipped with an integrated external probe, BASE-U-4 optical reader for programming and reading data from HOBO U series recorders,...

The use of physical methods in agriculture, in relation to plant material, may be a complement to agrotechnics requiring the use of chemical treatments. The study investigated the influence of microwave radiation at the frequency 2.45 GHz on the germination and growth of cress (Lepidium sativum L.). A significant influence of microwaves on the leng...

Ultraviolet radiation in the C band to limit storage losses of potato was applied. Six edible potato varieties, viz., Lord, Vineta, Owacja, Ditta, Finezja and Tajfun were used as test materials. UV-C radiation was emitted from a 15 W radiator. The wavelength of the light used to irradiate potato tubers was 253,7 nm and the power density from 80 to...

The paper describes the effect of UV-C stimulation of potato tubers and immersing of potato strips in water on differences in density of intermediate products for French-fry production. The density difference used for description of the experiment was defined as a relationship between the post-treatment density and pre-treatment density. The study...

The paper analyses results of measurements of precipitation amounts in the Widawa River basin in the multi-year period 1956-2012. Analysed were annual, monthly and daily precipitation totals and the numbers of days with precipitation in a year and in a month. Trends of changes were determined and extreme monthly and daily precipitation totals were...

The aim of this work was to observe germination of potato tubers upon microwave irradiation at various stages of ontogenetic development. Exact experimental and storehouse plots including laboratory testing were carried out in 2011-2014. These were related to six various maturity and various purpose edible potato tubers. A generator producing 2.45...

A condition of obtaining compost with proper sanitary parameters is achieving the organic recycling process temperature which exceeds 7°C. The objective of the paper was to determine the temperature course in the compost tank for organic recycling of dead poultry in relation to the applied structure forming material. Wheat, oat, barley, rapeseed an...

This paper analyses air temperature changes inside a cooling chamber of a vehicle carrying meat products, depending on the monitoring system in terms of maintaining the cold chain. The research was carried out in the years 2014-2015 in Małopolska region. The object of the research was a food business whose main specialty is the purchase, slaughter...

The purpose of the research was to determine whether the effects of irradiation of seed potatoes, resulting in an increased total tuber yield, are transferred to the plants of next generations. The research was conducted between 2011 and 2013 in southern Poland on very early edible potato varieties, Bard, Flaming and Orlik. The transfer of irradiat...

The study aimed at the determination of the power absorbed by a potato tuber during its microwave-heating with regard to its electrical properties and biometric characteristics. Seed-potatoes, put in the microwave cavity with the capacity of 15.7 dm3 , were irradiated for 10 seconds with microwaves at frequencies of 2.45 GHz generated by a 100 W ma...

The purpose of the present paper was to study the effect of microwave radiation on the number and weight of sprouts appearing on potato tubers after its storage. The studies included three early potato cultivars (Felka Bona, Rosara and Velox), whose tu-bers were radiated with microwaves with the frequency of 2.45 GHz for the period of 10, 20 and 60...

Streszczenie. Potencjał elektryczny jest jednym z podstawowych parametrem opisującym pole elektryczne. Wyniki badań wskazują, że bulwa ziemniaka wytwarza napięcie w prze-dziale 0,7-8,2 mV a wartość napięcia elektrycznego wzrasta wraz ze wzrostem masy bulwy. Zależność między wartością napięcia i czasem pomiaru ma charakter nieliniowy. Podkreślić nal...

The purpose of this work was to examine the impact of microwave radiation at fre-quencies ranging within (2.45-54) GHz on selected potato plant life processes. Completed re-search allowed to find positive impact of microwave radiation at frequency 2.45 GHz on the weight of irradiated seed potato germs, and on the weight of Felka Bona variety potato...

Streszczenie. W pracy przedstawiono wyniki trzyletniego doświadczenia dotyczącego reakcji roślin ziemniaka bardzo wczesnej odmiany Felka Bona, których sadzeniaki napromieniowano mikrofalami, na symulowany stres wodny w warunkach tunelu foliowego. Wyniki badań wskazują, że promieniowanie mikrofalowe istotnie modyfikuje strukturę plonu roślin ziem-ni...

Streszczenie. W pracy poszukiwano zależności pomiędzy dawką promieniowania mikrofa-lowego a odpornością bulwy ziemniaka na uszkodzenia mechaniczne mierzone siłą przebicia perydermy na granicy wytrzymałości biologicznej. Do badań przyjęto odmianę ziemniaka Felka. Bulwy poddane stymulacji mikrofalowej oraz bulwy stanowiące próbę kontrolną ob-ciążano...

Streszczenie. Celem pracy było określenie wpływu wielkości dawki promieniowania mikro-falowego i czasu jej ekspozycji na ogólny rozwój, plonowanie oraz odporność plonu na uszkodzenia mechaniczne bardzo wczesnych odmian ziemniaka. W doświadczeniu poletko-wym jako materiału badawczego użyto dwóch odmian ziemniaków: Aster i Felka. Uzyskane wyniki wska...

S t r e s z c z e n i e . Praca miaa na celu okre ślenie zale Ŝno ści między promieniowaniem mikrofa- lowym i czasem przechowywania a zawarto ścią azotanów w bulwach ziemniaków. Materiabadaw- czy stanowiy bulwy ziemniaków bardzo wczesnych odmian Aster i Felka pochodz ące z upraw w warunkach polowych. Bezpo średnio po zbiorze okre ślono mas ę ka Ŝde...

Streszczenie. Celem pracy było zbadanie wpływu przechowywania na wartość siły przebicia skórki bulw ziemniaka napromieniowanych mikrofalami. Nie stwierdzono statystycznie istotnego wpływu promieniowania mikrofalowego na wzrost wartości siły potrzebnej do uszkodzenia perydermy bulwy ziemniaka na granicy jej wytrzymałości biologicznej. Słowa kluczowe...

Streszczenie. W pracy zaprezentowano wyniki badań badanie przyrostu biomasy rośliny ziemniaka, w trakcie okresu wegetacji, wyrosłych z sadzeniaków napromieniowanych mikro-falami. W doświadczeniu wykorzystano bardzo wczesną odmianę ziemniaka Felka Bona któ-rej sadzeniaki napromieniowano mikrofalami. Stwierdzono istotny wpływ przyjętych w do-świadcze...

Streszczenie. W pracy zaprezentowano wyniki dwuletnich badań nad wpływem temperatury i opadu atmosferycznego, mierzonych wartością wskaźnika hydrotermicznego Sielianinowa, na plonowanie wczesnych odmian ziemniaka oraz na podatność plonu na uszkodzenia. Bada-nia prowadzone były w południowym rejonie Polski. Jako materiału do badań użyto dwóch bardzo...

Streszczenie. Badano wpływ promieniowania mikrofalowego na powstawanie uszkodzeń wewnętrznych przechowywanych bulw ziemniaka określonych przez wielkość ciemnienia pouderzeniowego. W przyjętych w doświadczeniu dawkach i czasach ekspozycji nie stwier-dzono istotnego wpływu promieniowania mikrofalowego na powstawanie uszkodzeń we-wnętrznych bulw ziemn...