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Analecta technica SzegedinensiaVol. 13. No. 2. (2019.)


  • Marijana Djordjević ,
    Meta Sterniąa ,
    Sonja Smole Moľina ,
    Sándor Beszédes ,
    Dragana ©oronja Simović ,
    Cecilia Hodúr ,
    Aleksandar Jokić ,
    Zita ©ereą :

    Microbial number reduction in spices through various treatments represents a necessity considering possible changes which may occur during spices’ storage and application in food resulting in public health risk. The present study was conducted in order to examine the effects of sterilisation and microwave irradiation treatments on total mesophilic aerobic bacteria (TMAB) and bacterial spore content reduction in black pepper. Treatments applied were: sterilisation at 130 °C during 30, 60 and 90 min; and microwave irradiation at a power level of 600 W during 1.5, 3, and 5 min. Prolongation of the sterilisation treatment expressed positive influence on TMAB and bacterial spore reduction in black pepper. Compared to the sterilisation, microwave irradiation treatment exhibited better results in terms of black pepper decontamination. Maximal decontamination regarding TMAB and bacterial spore was achieved in black pepper samples treated with microwave irradiation during 3 min. The present results suggest that microwave irradiation could be applied in black pepper decontamination considering better effectiveness compared to the sterilisation treatment.

  • Tamás Major ,
    Imre Czupy ,
    Attila László Horváth ,
    Viktória Papp ,
    Andrea Tünde Kiss :
    Research in the mechanization of black locust renewal and planting6-11en [258.84 kB - PDF]EPA-02592-00013-0020

    Nowadays, the black locust (Robinia pseudoacacia) is the most current and the most widely used tree species in Hungary. Due to its penetration and the wide variety of application it’s worth to examine the different mechanization options of the reforestation technologies and their costs. We provided our research in the area of Nyírerdő Nyírségi Erdészeti Zrt. According to the tests it can be said, that the cost of the reforestations with root ripping is the most favourable and the reforestation or regeneration with planting costs the most. The disadvantage of the regeneration with root ripping is, that after its multiple application it can be observed the significantly degradation of the assortment composition and of the tree utilization income.

  • Virág Nagypál ,
    Edit Mikó ,
    Imre Czupy ,
    Cecilia Hodúr :
    Water footprint: A new approach for a more sustainable future12-20en [444.26 kB - PDF]EPA-02592-00013-0030

    Sustainability of water use has got into focus recently, as availability of fresh water resources is under depletion. Population growth, extreme weather conditions (drought), increasing global meat demand all results in higher water consumption of humanity and ecosystem. Water footprint is a promising indicator, which assesses both qualitative and quantitative deterioration of fresh water supplies. By identifying blue, green and grey water components, water use can be assessed in a more comprehensive way. Furthermore impact assessment of different components during production and processing let us identify crucial points of water use, where more efficient solution should be found. As a consequence of a more conscious and sustainable water use assessment considering water footprint, there is a chance, that future generations will inherit fresh water supplies at least in the same condition as we got it from our ancestors.

  • Krisztián Szűcs :

    There have been several studies about competitiveness and within this, company competitiveness. These studies include mainly the whole company spectrum in terms of company size from micro to large enterprises. There are studies which focus on large companies and the others on big and medium sized companies. There are studies which use mostly secondary data, and there is a few which use primary data. Although more studies do not take into consideration the fact that the operation mechanism and behaviour of small enterprises are different from the larger ones. Moreover, by using secondary data we are not able to look into the company, which does not ease the task of the researchers and business economics specialists. This is the reason for this study topic, which can fill a gap in the examination of enterprise competitiveness. In my analysis I focus on Hungarian small enterprises, and I do research using primary data. The research was done by a research team at University of Pécs Faculty of Business and Economics. I was also a member of this group, who analyses company competitiveness, but in my study I focused on the role of the companies in the online space. The online research of the companies was done with the co-operation of University of Pécs Faculty of Engineering and Information Technology, the result of which was integrated into the final sample. I deal with its descriptive analysis in this study.

  • Laszlo Kovacs ,
    Szilard Szabo :

    Using poppet valves to control the air-fuel mixture entering and leaving the combustion chamber of an engine is just one among many other more flow efficient alternative solution. The geometry of the poppet valve and its valve seat are the main causes of the flow restriction in the internal combustion engines. The engine downsizing concept dictates to obtain more power from a given engine volume, therefore proportionally more air should be drawn into the cylinders to burn more fuel. These criteria best fulfilled with a new Swinging Valve (SwV) solution that enables the unhindered flow of air and exhaust gas through an engine’s cylinder. The filling of a cylinder is improved while the pumping losses are decreased. In this experiment, a Super Flow SF600 flow bench was used to examine a Suzuki SV650 motorcycle engine’s normal poppet valve cylinder head and a Swinging Valve cylinder head was constructed as well. First the flow parameters of the original cylinder head were obtained then the Swinging Valve head was investigated in the same way. The outcomes of the tests show the superiority of the new concept. The results will also be the base of further 0D/1D engine simulations.

  • Eleonóra Kecskésné Nagy ,
    Helga Tima ,
    Péter Korzenszky ,
    József Nagy :

    Thanks to the favorable impact of vintage effect occurring in recent years the Fusarium contamination of wheat and consequently a high DON-toxin concentration is often caused problem. The DON-toxin in terms of human and animal health is a serious food safety risk factor. Therefore, it is important that there are methods during the wheat milling process which reduces the level of toxin. We confirmed in our earlier examinations, that with the help of modern color sorting machine the DON-toxin content of wheat items is effectively can be reduced. The question is, during the process how parallel changes the mycotoxin content of by-products, which are used primarily as animal forage. The authors are presented an analysis of these relevant experimental data. The results show, that the toxin content of the by-product is exceeds the starting wheat item's toxin content. However, the result of the regression analysis shows that no correlation in the toxin contents between the starting raw material, purified wheat and by-product. This should be considered to the users when they would like to utilize the by-product as ingredient of forage or feedstuff.

  • Judit Csizmásné Tóth ,
    Péter Szöllősi :
    Bank selection criteria when borrowing a personal loan47-51en [501.47 kB - PDF]EPA-02592-00013-0070

    In 2018 there was an increase in the number of people who borrowed personal loans, in both the European Union and Hungary. In Hungary, personal loans increased hugely by 48%. We conducted a non-representative survey. We wanted to determine those bank selection criteria that influence our decision on which particular bank we choose to borrow a personal loan. This information will help us to understand the customers better and let the banks provide a better service tailored to their needs.

  • Titanilla Oravecz ,
    Ildikó Kovács :

    Honey is becoming increasingly popular among consumers for its health and nutritional benefits as well as several other functions. The survey identifies four main dimensions of honey-purchasing motivation: medical benefits of honey consumption, dietary quality, cosmetics and sweetener. There are very limited empirical analysis of the aspects of honey consumption. The present study contributes to fill this knowledge gap through a qualitative study of consumer perceptions, preferences and attitudes towards honey among Hungarian consumers through 86 in-depth interviews. The study identifies different consumer segments, which are also willing to pay premium prices for the Hungarian or local honey. Quality cues are defined by search attributes of the product (colour, taste, aroma, thickness), and ethical attributes (warranties, brand name, country-of-origin).

  • Balázs Szabó P. ,
    Tekla Sáry ,
    Balázs Szabó :

    Biomimetic restorative dentistry strives to replace lost tooth tissue by biomaterials with similar physical properties. In order to do so, mechanical testing of dental restorative materials on their own and later in dental cavities is highly important. During this process dentists and engineers are collaborating aiming to set the indications of certain restorative materials and application techniques. In vitro fracture resistance testing of a restored tooth is one of the most important tests to be carried out during the indication setting process. However, for this specific test and received results to be valid for clinicians, the group conducting the tests must pay attention to mimic intraoral conditions as much as possible. The article aims at identifying the key elements of fracture resistance tests in dentistry. Adequately conducting this test is a prerequisite for later testing in in vivo conditions the restorative techniques that produced the best results among the in vitro tests.

  • László Gogolák ,
    Sándor Csikós ,
    Tamás Molnár ,
    Péter Szuchy ,
    István Bíró ,
    József Sárosi :

    The automotive industry was always characterized by innovation and the use of cutting edge technology. Daily we can see vehicles packed with technological advancements. The main focus of the current technological trend is electric drives. With the rise in popularity of electric cars more types of vehicles are adapting electric drives. In the case of airplanes the standards are higher than in the case of cars so the emphasis of research and innovation is greater. This paper presents a list of the challenges electric aircrafts face and their potential solutions. Currently many of these problems currently only have partial solutions if any. There is also a comparison between the properties of materials used and the expectations for hybrid aircraft. A comprehensive model was created taking into account the criteria set for hybrid and electric aircraft. With the aid of the model the effect of the most important components on efficiency can be assessed.