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Analecta technica SzegedinensiaVol. 12. No. 1. (2018.)


  • Diána Furulyás ,
    Viktória Dobó ,
    Dóra Székely ,
    Rentsentdavaa Chaagnadorj ,
    Éva Stefanovits-Bányai ,
    Mónika Stéger-Máté :

    In our study, we were looking for an alternative to use of sea buckthorn pomace to open new opportunities. The dried pomace was extracted in a different method to achieve the highest antioxidant content. Ethanol and acetone were used as solvents, applied in different concentration. For the selection of the optimum extraction method, four spectrophotometric measurements were performed. With the best extract, three types of apple juice were made from apple juice concentrate by diluting it with different percentages of water and pomace extracts. The spectrophotometric measurements were also performed for juice samples to check the increase in amount of antioxidant components in the apple juice. Acceptability of enriched juices was determined by sensory evaluation and short market research. Based on the results the optimum extraction agent is 40 m/m % acetone for enriching apple juice. The results showed that there is a demand for the consumption of enriched juice with sea buckthorn pomace extracts and the fruit juice enriched with the 1:1 ratio of extract: water mixture is the most optimum according to sensory evaluators. Further examination could reveal whether the extracted antioxidant content of the pomace could be used as bio-preservatives in the food industry.

  • Zita Boglárka Zakupszki ,
    Antal Véha ,
    Balázs Szabó P. :

    In the baking industry, continuous development of products is required because consumers with different nutritional needs are pushing for new requirements for food. Along with the low caloric content, there is growing attention to the functional effects of foods. The aim of our work is the development of a matzo made of wholemeal rye flour, which helps in healthy nutrition for the customer’s and more economical from production’s point of view. The main aim of the product development in our project is to increase the nutrient content by the raise of mineral and fibre content. In the first part of our work we performed basic measurements with flours used during product development. We measured the quantity and quality of gluten protein with Glutomatic-Gluten Index System, the activity of amylase enzymes with Falling Number 1400 and we did complex dough monitoring with METEFÉM Valorigraphe FQA 205. In the second part of our project we compare the basic matzo with matzos made of 3 different recipes. Based on results of examinations it can be ascertain that the Sample 2 shows more advantageous values of the fibre content’s and the prime cost’s point of view.

  • Brigitta Zsótér ,
    Máté Szigeti :

    We were searching for the first part of the development period from 2014 to 2020 in Sarkad, which mainly covers infrastructural investments. The purpose of our research is to investigate how the inhabitants think about the investments at a given time, and also to investigate the effect of the overall investments that they have experienced in Sarkad, in their own part of the city or in their own lives. The opinions of the participants in our questionnaire suggest that the upgrading’s should be continued and, moreover, more investment for job facilities should be made by the local government in the city. This way, the satisfaction of the population could be maintained and the degree of emigration could be reduced.

  • Renáta Rauch ,
    Rita Földényi :

    The development of efficient methods for the removal of different type of organic contaminates of natural waters is an ever challenging task in the modern environmental technology. The paper reports the physical characterization and adsorption properties of a Hungarian oil shale. Static equilibrium experiments were carried out to study the adsorption of 2,4-dichlorophenol (2,4-DCP) from aqueous solution. The obtained equilibrium data were satisfactorily fitted by a multistep adsorption isotherm within the concentration range of 0 to 100 mg/l. According to our laboratory scale experiments the studied row oil shale (OSR) adsorbent immobilizes the contaminants more efficiently than a number of other adsorbents applied in different remediation technologies. More than 90 % of the added 2,4-dichlorophenol was adsorbed by the studied oil shale. The contaminants are bound strongly by the sorbent therefore they cannot be washed out by the groundwater flow which, in turn, favors to the natural bacterial decomposition process of the polluting compound. This is considered as a significant advantage of the adsorbent because no chemical regeneration of the inexpensive oil shale is required. The reported results indicate that the oil shale can be used efficiently for the treatment of natural waters to remove their organic contaminants.

  • Gábor Mucsi ,
    Roland Szabó ,
    Mária Ambrus ,
    Balázs Kovács :
    The development of fly ash – red mud based geopolymer30-38en [908.87 kB - PDF]EPA-02592-00010-0050

    Taking into account environmental considerations, such as decreasing CO2 emission and the ecological footprint, the utilisation of secondary raw materials is essential for sustainable development. Fly ash is the product of coal combustion plants that is collected by various air cleaning equipment from flue gas, and red mud is the by-product of the Bayer-process, through which alumina can be produced from bauxite. Geopolymerisation is a process that is suitable for the utilisation of such wastes to produce ceramics, cement, concrete etc. with many advantageous properties. The main objective of the article is to present data on the development and examination of geopolymer made out of deposited fly ash from Tatabánya and red mud from Almásfüzitő. During the experiments, red mud was added to previously optimised fly ash geopolymer in various quantities and compressive strength tests were carried out to determine the optimal fly ash and red mud ratio. However, as the cracking of the specimens could be observed, further tests were carried out on the durability of the geopolymers. The effect of the sealing conditions and RM calcination was investigated, both via visual inspection and with FT-IR analysis at the ages of 3, 7, 14, 28 and 90 days. Based on the results, it could be concluded that the sealing conditions have direct effect on the structural characteristics of fly ash – red mud based geopolymers, but further experiments should be carried out for the identification of the ongoing reactions.

  • János Simon :

    The Internet of Things (IoT) is starting to appear everywhere in many shapes and forms. But security is one of the most crucial thing that could trip up the growth of the IoT. Following security principles used in enterprise computing can help clear that issue. Already there are more connected devices than people on the planet, according to leading researchers in this area. By 2020, there will be 50 billion connected devices, outnumbering people by more than 6 to 1. Most of these devices will be controllable over the Internet, and they will increasingly be responsible for collecting and transmitting sensitive data. Today consumers might own an app that collects information on their exercise routine. In a few years, those same people might have an Internet-enabled medical device that continually delivers data to their doctor. In the wrong hands, data from home management systems could be used to assess user’s whereabouts. Likewise, businesses could be vulnerable when they connect things like HVAC, irrigation, or commercial appliances.