Böngészés
legfrissebb feltöltések
Megjelenítve 1 - 20 (Összesen 225)
Tétel Korlátozottan hozzáférhető Comparative analysis of grassland improvement methodsNjagi, Ceciliah; Szőllősi, Nikolett; Zsembeli, József; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis study's main goal was to learn more about the management of grasslands using plant conditioners and natural soil amendments, as well as any potential benefits or applications for these goods and materials in raising the health and productivity of grasslands. In Hungary, near Karcag, two small-plot experiments were established on a natural pasture. To improve the habitat for the grasses and restore the pasture's deficient soil qualities, varying amounts of wood ash and organic manure were given to the soil. Algomel Push and Agroptim Sunset, two products, were used in combination as plant conditioners in another small-plot trial. The results were compared to untreated control and liquid nitrogen with a 30% N-content. Three repetitions of the soil reclamation experiment were conducted on 2x12 plots, each with a net plot area of 30 m2 and 0.5 m access roads. In autumn 2022, the plots were covered with wood ash in doses of 0, 10, 20, and 30 g m-2 and organic manure in doses of 0, 10, 15, and 20 t ha-1. On a 0.01 hectare area, the plant conditioning experiment was conducted. April 27, 2023, saw the setup of the experiment. Using an injectable syringe, the evaluated plant conditioners were dosed at 4 mL (4 L/ha) and diluted to 2 L with water. Using a backpack sprayer, the agent-containing solutions were evenly distributed across the treated plots. In addition,the control plots were sprayed with clean water (2 L/plot). The following parameters were determined: total green biomass yields, soil pH, electrical conductivity, carbon dioxide emission from the soil, and species composition of the grasses by coenology analysis. In the ash application experiment, the treatments failed to increase the topsoil's actual soil moisture content during the summer, and by October, the differences had significantly decreased. Similar connections were found for the manure application experiment. I came to the conclusion that the addition of manure and ash to the topsoil in my experiment did not considerably increase its actual soil moisture content. In the summer, neither of the treatments raised the pH of the topsoil. By October, the effects of the treatments were apparent: both the ash and manure applications were associated with higher pH values, indicating that these soil amendments had a positive effect on the topsoil's pH, shifting it toward a less acidic range. However, under the studied conditions, this positive effect could only be determined in the fall. The tested amendments even raised the soil EC after application, suggesting that my hypothesis—that applications of wood ash and organic manure result in the lower salt content of the topsoil (A horizon) due to the increased chance for leaching during the investigated period—should be rejected. The actual soil salt content of the topsoil was not decreased by the treatments. In terms of soil respiration, I proved that applying wood ash and organic manure increases the amount of microbiological activity and root respiration in the topsoil; however, in the conditions I researched, this beneficial effect could only be determined in the fall. The effects of applying wood ash and manure on the grassland's green biomass were found to be controversial. While the highest dose of wood ash resulted in a yield depression, the highest dose of manure produced a significant yield rise. Comparing the lower doses to the untreated control, however, revealed no or just mildly adverse effects. I think more information is required to determine the relationship between the grassland's green biomass and the application of these natural soil amendments. The green biomass of the grassland was increased by all the plant conditioner treatments. Based on these results. My findings suggest that the use of Algomel Push plant conditioner has a good potential to increase the green biomass of grasslands with similar conditions. I could figure out the obvious effect of the treatments on one grass species, namely meadow foxtail (Alopecurus pratensis), which doubled its coverage on the treated plots, while got less dominant on the untreated plots. The invasion of voles basically influenced the change in the coenose of the investigated pasture suppressing the effect of the treatments.Tétel Korlátozottan hozzáférhető Juglans neotropica walnut fungus analysisRecalde Soliz, Veronica Lissette; Karaffa, Erzsébet; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarJuglans neotropica Diels, also known as "Nogal" or "Tocte," member of the Juglandaceae family is a tree native to the South American Andes with its natural habitat spanning Ecuador, Colombia, Peru, and Bolivia. Regarding its fruit, the walnut of Nogal is covered by yellow flesh. The walnuts are susceptible to invasion by various fungi both in the field and during storage, resulting in potential mycotoxin production. The main objectives of this study were to determine the fungi found in immature J. neotropica walnuts through their morphological structure, determine the possible fungal mycotoxins present and describe approaches to minimize the presence of fungi and mycotoxins in the walnut industry supply chain. Asymptomatic, and symptomatic green fruits were collected from 12 walnut trees located in the city of Quito, province of Pichincha, Ecuador during the fourth week of January 2024, which according to the analysis they were between 50% and 60% of the final sizeAfter sterilization and appropriate incubation, mycelia from the fungal colonies that grew were transferred to fresh potato dextrose agar (PDA). Macroscopic and microscopic morphology was described. The results were that 60% of the samples belonged to Alternaria genus, 8% belonged to Penicillium genus and 32% remained unidentified. According to the Alternaria genus the possible mycotoxins present in walnuts could be alternariol (AOH), alternariol monomethyl ether (AME), tenuazonic acid (TeA), altenuene (ALT) and altertoxins (ATX-I, -II, -III). According to the Penicillium genus the possible mycotoxins present in walnuts could be patulin, penicillic acid, citrinin, citreoviridin, cyclopiazonic acid, roquefortine C and especially ochratoxin A. The main approaches to minimize the fungi and mycotoxin contamination in walnuts are preventive measurements with adequate agronomic practices, controlling parasitic insects or other biotic stressors in order to prevent lesions in the walnuts, storage requirements control based on the oil and fatty acid compositions and establish a HACCP strategy encompassing all stages of the supply chain.Tétel Korlátozottan hozzáférhető Enhancing viability and growth of Japanese quail eggs through honey injection: a novel approach to boosting immunitySallouha, Bensassi; Knop, Renáta; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe present study was designed to explore and investigate the effects of in-ovo supplementation of honey on hatchability, weight of chicks during the first three weeks of growth, late embryo mortality, and the post-hatch mortality of chicks. In this context, 244 fertile quail eggs were divided into 3 groups. According to these findings, hatchability could be enhanced through in-ovo administration of diluted honey, owing to the supplementary energy source it provides to the chicks. The rise in late embryo mortality in the treated groups underscores the need for greater precision in processing, as well as careful consideration of the duration of egg placement. It remains impressive that mortality during the initial growth phase is low in the treated groups, indicating an enhancement in the chick's immune system. Lastly, regarding weight, it's crucial to further explore possibilities for improvement, as the treatment in this case did not yield enhancements.Tétel Korlátozottan hozzáférhető Investigation of the effects of variable pH & CO2 injection on the biomass growth of Chlorella vulgaris for sustainable microalgae cultivationAmalina, Nadya Nurul; Magyar, Tamás; Nagy, Péter Tamás; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarMicroalgae, photosynthetic organisms that produce organic compounds from carbon fixation, are increasingly important for sustainability and achieving Sustainable Development Goals (SDGs). However, their production is limited due to nutritional and environmental conditions like pH and CO2 concentration in nutrient solutions. This research investigated the growth of Chlorella vulgaris microalgae under different pH levels and CO2 injections. Results showed that all chemical parameters showed a decreasing tendency under different conditions. The highest biomass growth was achieved with CO2 injections, with the highest chlorophyll concentration. However, the injected CO2 significantly decreased the microalgae activity rate. Variable pH also had a significant effect on biomass growth, with neutral pH (7) resulting in the highest chlorophyll concentration. Alkaline pH (9.6, 10.2, and 11.0) could stimulate biomass increase in the first 10 days. Combining CO2 injection with an alkaline pH nutrient solution could shorten cultivation time and increase biomass generation, contributing to sustainability.Tétel Korlátozottan hozzáférhető The effect of washing for the shelf-life parameters of spinach (Spinacia oleracea L.)Shahriyari Ansaroudi, Rana; Karaffa, Erzsébet Mónika; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarAs a member of the Goosefoot family, spinach (Spinacia oleraceae L.) is widely recognized for its vivid green foliage and multipurpose nature in the realm of food. It is highly regarded for its nutritional density, which comprises significant quantities of phytonutrients, vitamins, and minerals. The produce business commonly utilizes sodium hypochlorite or chlorine solutions as the primary disinfection agents. Nevertheless, they generate chlorinated by-products that have the potential to be harmful to people (Pahariya et al. 2022). So, the contemporary food industry's transition towards minimally processed ingredients has emphasized the criticality of prolonging the shelf life of spinach while preserving its nutritional value and freshness. Nevertheless, there are notable obstacles that have emerged regarding the presence of microorganisms, particularly those generated by harmful bacteria like Salmonella and Escherichia coli. The aim of this thesis was to assess the efficacy of using a 0.5% citric acid solution to wash spinach in order to reduce microbiological contamination and enhance shelf-life characteristics, therefore maintaining quality attributes during storage. By doing so, it attempts to fill important gaps in industry practices and consumer safety and offer empirical support for the implementation of sustainable preservation methods. Moreover, it addresses the changing demands of industry stakeholders and consumers. The research entailed the utilization of diverse techniques to prepare spinach leaves for microbial analysis. The leaves were washed with citric acid and sterile water, dried, and stored at different temperatures. Enumeration of yeast and molds, detection of E. coli and coliforms, and determination of the total microbial population comprised the microbial investigations. Total bacterial growth was determined using the pour plate method and PCA media culture; dishes containing fewer than 150 colonies were chosen for enumeration. whereas the spread-plate technique was utilized for determining yeast and mold content with DRBC media culture. the population of E. coli was determined using TBX media culture and the use of the pour plate method. The chlorophyll meter SPAD-502 was employed to determine the relative chlorophyll content of spinach. The TA.XTPlus Texture Analyzer was employed to ascertain the tensile strength and firmness of spinach leaves, attributes that are indicative of their freshness. Carotenoids, chlorophyll a, and chlorophyll b content were measured utilizing spectrophotometrically at wavelengths of 480, 647, and 664 nanometers. The outcomes of the data analysis, which was conducted with SPSS, were contrasted through a variety of tests like the Kruskall-Wallis test. The initial significant reduction in total microbial contamination was observed on day zero and also during storage until the 4th day, attributed to citric acid's antimicrobial properties. However, the efficacy of citric acid treatment declined over time, ultimately failing to have any noticeable effect on microorganisms by the seventh day of storage. Regarding yeast and mold content, the reduction in fungal contamination facilitated by citric acid treatment was at a significant level compared to both control and water-washed samples on the zero-day of analysis. However, the extent of this reduction fell short of one lg cfu/g, failing to achieve the requisite reduction to meet the accepted contamination level. However, this disinfection was effective only until the 4th day and then waned afterward. The study also found that citric acid could decrease E. coli contamination immediately after washing but the reduction is not significant. The disinfection effect of this organic acid on E. coli disappears during storage at 12°C. The presence of citric acid did not have a noteworthy impact on the SPAD value of leaves. However, when considering the influence of time and storage duration, increases in the SPAD value of spinach leaves were found. Both unwashed and cleansed samples exhibited a reduction in leaf elasticity throughout the storage period. Throughout the duration of storage, the control samples exhibited a substantial reduction in elasticity than citric-washed samples. Therefore, citric acid emerges as a prospective substitute technique for the cleansing and disinfection of spinach leaves. Carotenoid content increased continuously in the "unwashed" treatment group, suggesting that citric acid might also affect the storage stability of carotenoids. Regarding the discoveries regarding chlorophyll, no significant differences were observed among the control and treated samples during the study period and the full storage term. The average concentration of chlorophyll "b" in spinach leaves remained constant during storage, however, the trend varied for samples that were subjected to citric acid washing. This study provides a comprehensive analysis of the impact of citric acid treatment on the quality of spinach maintained at low temperatures. The analysis takes into account sensory qualities, biochemical composition, and microbiological contamination, resulting in a clear understanding of the many effects of citric acid treatment. The primary aim of this research study was to evaluate the antimicrobial effectiveness of citric acid against common microbial contaminants found in perishable agricultural products, such as E. coli, yeast, and viable bacterial count on spinach leaves. This assessment was conducted both immediately after washing and during a 7-day storage period at a temperature of 4°C. In general, citric acid exhibited satisfactory efficacy in regulating the overall microbial count, as well as yeast and fungi, in spinach samples during refrigerated storage (4±1 C for seven days). Nonetheless, at 12 °C, there was no significant reduction in E. coli. Furthermore, except for insignificant decrease of texture, there were no statistically significant distinctions or adverse effect observed in terms of sensory quality between samples treated with CA, control, and water-rinsed samples. Hence, a single-step cleansing process utilizing 0.5% citric acid (2 minutes at 25 degrees Celsius) proves to be an efficacious, viable, and organic produce-compatible disinfectant for spinach leaves. Moreover, it may serve as a substitute for their conventional cleaning and disinfection technique. The findings of our study indicate that washing methods and the condition of storing can affect its respiration rate, metabolic processes, tissue integrity, and sensory quality. However, it was found that using CA treatment can effectively control foodborne pathogens on fresh spinach leaves immediately following citric acid washing and can maintain its effectiveness for up to four days of storage without negatively impacting the quality of the spinach leaves (Zhou et al. 2023). To improve the effectiveness of citric acid in extending the freshness of spinach leaves, the study suggests implementing the following measures: concentration optimization, evaluation of pre-treatment methods, assessment of integrated approaches, analysis of microbial diversity, and consumer acceptability studies.Tétel Korlátozottan hozzáférhető Comprehensive analysis of super absorbent polymers effects in diverse soil typesBarrero Rubiano, Ferney Adriano; Nagy, Péter Tamás; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarIn response to the challenges facing global agriculture, this study explores the potential efficacy of Super Absorbent Polymers (SAPs) specifically Stockosorb and Zeba, on three distinct soil types: Sandy Soil, Meadow Chernozem, and Calcareous Chernozem. Through the application of varying SAP doses, the research aims to evaluate their impact on critical soil parameters including pH, Electroconductivity, Nitrate, and Ammonium content. Moreover, it investigates their role in extending water retention, mitigating crop wilting, and reducing water consumption. It is noted that higher concentrations of SAPs do not necessarily yield superior results; rather, the study underscores the importance of considering the relationship between SAP absorption capacity and the water uptake ability by plants. This understanding is essential for informed decision-making in agricultural practices. Conducted in the greenhouse facilities at the Institute of Water and Environmental Management of the University of Debrecen during March 2024, the findings highlight Zeba treatment at a concentration of 0.5 g/kg of soil as a promising approach under the conditions evaluated for enhancing agricultural sustainability and escalating water scarcity challenges.Tétel Korlátozottan hozzáférhető Dynamic interaction between extreme climatic events and maize production in South Africa: comprehensive research on a regional scaleLetswamotse, Tshepiso; Mohammed, Safwan; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe study sought to ascertain the effects of agricultural drought on South African maize production. Rainfall-based Standardized Precipitation Index is used at the 3-month (SPI-3) and 6-month (SPI-6) scales to assess the drought trends over a 30-year period (1993-2022) and Standardized Yield Residual Series (SYRS), which was associated with SPI-3 and SPI-6 was calculated to provide the country's real yield loss intensity and percentage at the provincial level. To evaluate the drought resilience of maize crop on a provincial level ,the Crop-Drought Resilience Factor is calculated for the driest year of the crop's growing season. Analysis reveals dynamic shifts in agricultural drought occurrences and its impact on maize yield over 30 years.Tétel Korlátozottan hozzáférhető Investigation of Cryphonecteria parasitica at molecular level and examination of potential biological control of the fungusHoque, Rabbi; Tarcali, Gábor; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarChestnuts, a valuable tree in Europe, the US, and Asia, are cultivated for their culinary and therapeutic properties. However, chestnut blight disease, a major biotic agent, has led to the death of almost 50% of orchard trees since its introduction in 1960. Molecular identification of C. parasitica (the causal agent of chestnut blight) has been done in this research with ITS and TEF primers. The use of antagonistic microbes for biological control may be an effective solution for chestnut blight canker, in this case, eight different Trichoderma species were tested against virulent and hypovirulent samples of C. parasitica, with six showing good biocontrol and inhibition against the pathogens. This study highlights the effectiveness of antagonist fungi in treating chestnut blight canker.Tétel Korlátozottan hozzáférhető Esterase activity of various strains of Lactiplantibacillus and Loigolactobacillus genera for zearalenone degradationYuzansa, Syahadana Putra; Pusztahelyi, Tünde; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe research aim is to study esterase production and the effect of heat treatment on the esterase activity of LAB and also to test LAB esterase for zearalenone degradation. This experiment will provide data on the impact of temperature on the esterase activity of the mentioned LAB strains. This experiment's results can also be used as a reference for the next step to determine more effective usage of LAB species, especially with high esterase activity as a zearalenone degradation agent.Tétel Korlátozottan hozzáférhető Analysing the effects and relationship of the pandemic in food waste Generation in European countriesAlzeidi, Narjis; Magyar, Tamás; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis thesis conducts a comprehensive analysis of the dynamics of food waste and loss (FWL) along the international food value chain, highlighting their severe impacts on the environment, society, and economy. It makes a clear distinction between Food Waste (FW) and Food Loss (FL), proposing specific mitigation strategies for each category. The research indicates that annually, approximately 1.3 billion tonnes of food, which represents one-third of all food produced for human consumption, is discarded.Tétel Korlátozottan hozzáférhető Quality assurance framework for cocoa powder beverage productionJayallan, Yuwaraaj; Pusztahelyi, Tünde; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis thesis proposes a comprehensive Quality Assurance (QA) framework for cocoa powder beverage production, addressing the need for consistent quality and safe production in this growing industry. The framework integrates Failure Modes and Effects Analysis (FMEA) and comprehensive risk assessment guides to improve the efficiency throughout the production process. The proposed framework offers a valuable model for cocoa powder beverage manufacturers seeking to optimize quality, protect consumer health, and gain a competitive advantage in the marketplace.Tétel Korlátozottan hozzáférhető Assessment of the effects of urbanization processes in Mbeya Urban, Tanzania by fusing U-Net neural networks, Markov Chains, and Von Neumann’s Spatial DynamicsMaziku, Petro; Fehér, Zsolt Zoltán; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe main objective of this research is to investigate land use changes in urban areas and establish their impacts on agricultural growth. The study aspires to provide knowledge for urban planners in preserving agrarian areas, which are essential to meet food demands for the growing population. The research aims to give insightful experience to policymakers, natural resources professionals, and researchers to help monitor land use and natural resources.Tétel Korlátozottan hozzáférhető A comprehensive assessment of greenhouse gas emissions from wetlands within the European Union (1990-2040)Al marshudi, Amjad; Mohammed, Safwan; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis study provides a comprehensive examination of the fluctuations in CH4 emissions from wetlands across the European Union (EU) over a specific timeframe from (1990-2020) and a projected period from (2020-2040). The study employs statistical techniques such as Mann-Kendall Analysis, Sen's Slope estimation, Tukey Test comparisons, and Principal Component Analysis to evaluate trends, magnitudes, and patterns of CH4 emissions, along with constructed bibliometric network using VOSviewer tool.Tétel Korlátozottan hozzáférhető Quality control of the Sage (Salvia Officinalis) extractZeqiri, Blerta; Máthé, Endre; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe thesis explores the complex biochemical composition of sage extracts, presenting the precise interaction between polyphenolic and flavonoid chemicals that give this plant remarkable antioxidant, anti-inflammatory, and antibacterial qualities. The research emphasizes the therapeutic potential of sage extracts in reducing oxidative stress, inflammation, and chronic diseases, based on spectrophotometric analysis and research comparisons with other plant sources. Moreover, studies on the nutritional impact of Sage Gemmotherapy extract (GTE) on the survival of Drosophila melanogaster under various dietary circumstances show promising outcomes. The GTEs, rich in bioactive compounds like polyphenols, flavonoids, amino acids, and vitamins, exhibit notable antioxidant and anti-inflammatory effects, enhancing larval and adult survival rates. The thesis advocates for further research to optimize GTE concentrations, explore nutritional benefits, ensure regulatory compliance, and probe into potential applications. Moreover, strict quality control measures are implemented to ensure the consistency and purity of the Sage GTE extract, enhancing the credibility and reliability of the findings while facilitating regulatory adherence.Tétel Korlátozottan hozzáférhető Fortification of wheat bread with red grape pomace powder: physicochemical and sensory analysisShala, Donjeta; Alexa, Loránd; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarModern food industries are increasingly focused on repurposing agricultural by-products to minimize waste and enhance nutritional value through techniques like fortification. In our study, we aimed to create a new product formula by enriching wheat bread with red grape pomace powder. Besides the control sample, products were prepared by substituting 5; 10; 15; 20; 25 and 30% of the wheat flour with the dried, ground pomace of Kékfrankos grape variety. The analysis was focusing on determining both physicochemical parameters and conducting sensory analysis. Our results, statistically analyzed and presented in tables and graphs, cover key metrics such as mean values, standard deviations, and coefficients of variance. We explored various physicochemical parameters including acid level, texture, dry matter content, protein content, fiber content, total phenolic content (TPC), flavonoid content, and elemental composition as well as the sensory assessment. Our result showed that the enrichment by grape pomace holds promise in enhancing food products, particularly in providing antioxidant boost, fiber enrichment, mineral fortification (micro and macroelements), and protein enhancement. Continued research and innovation in this area could unlock further opportunities for utilization.Tétel Korlátozottan hozzáférhető Analysis of physico-chemical composition, nutritional impact, and health risk assessment of rosé wines from different Hungarian wine regionsRivera, Geremie; Czipa, Nikolett; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe objective of this study was to analyse the physico-chemical composition, nutritional impact, and health risk assessment of rosé wines manufactured from Hungarian wine regions: Balatonboglár, Eger, and Villány. The parameters measured were pH, sugar content, total phenolic content (TPC), flavonoid content (FC), and element content (Ca, K, Mg, Na, P, S, Al, B, Ba, Cu, Fe, Mn, Sr, Zn). The highest pH, sugar content, TPC, and FC were measured in Balatonboglár wines, as well as the highest concentrations for K, Mg, Na, Al, Mn, and Sr. Eger wines obtained the highest Ca, B, and Ba contents, whereas Villány wines showed the highest P, S, Cu, Fe, and Zn contents. None of the rosé wine samples presented significant health risks based on the risk assessment.Tétel Korlátozottan hozzáférhető Examination of elemental composition in baby foods: contribution to NRVs and chemical risk assessmentKryeziu, Ardit; Czipa, Nikolett; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis study aims to examine the element content in baby foods recommended for babies aged 4 to 12 months. This study involves the utilization of an inductively coupled plasma mass spectrometer (ICP-MS) for examining the concentration of macroelements (Ca, K, Mg, Na, P, S), microelements (Ba, B, Zn, Mn, Fe, Cu, Sr, Co, Ni, Se, Mo, Cr) and toxic elements (Al, Cd, Hg, Pb, As).Tétel Korlátozottan hozzáférhető Biocontrol potential of essential oils against wheat rust diseases and their effects on wheat yield componentsMashilimu, Seni; Tarcali, Gábor; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarA field experiment was conducted to evaluate the effectiveness of some essential oils against wheat rust diseases. Three essential oils were tested namely;- Lavandula angustifolia, Melaleuca alternifolia, and Mentha piperita. In the same experiment in other plots, two commercial fungicides (Riza 250EW and Revyona), one plant conditioner (Rhizomagic), and a control were included to compare the results. Analysis of variance showed highly significant differences among the treatments where the standard commercial fungicide reduced the disease severity compared to the control. However, no significant difference existed between the tested essential oils and the control. .Tétel Korlátozottan hozzáférhető Dose dependence effect of tannins on feeding activity of Colorado potato beetle larvae (Leptinotarsa decemlineata Say)Okiria Aisu, Latif; Nagy, Antal; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarIn this research, the dose-dependence effect of tannins was evaluated under laboratory conditions, with the aim of providing a more environmentally friendly option that minimizes the use of conventional chemical control and prove the applicability of tannins as an alternative control method The specific objectives were to identify the effect of tannins on the feeding activity of the Colorado potato beetle, and to determine the most effective dose of tannins in controlling the Colorado potato beetle When we statistically evaluate the dynamic of the studied effect, we find that the higher concentrations have a significant negative effect on feeding activity compared to the control group already after 24 hours of diet. On the first day, the 0.4%, 0.8%, and 1.0% tannins had a significant effect, while this could not be proven in the case of the 0.6% treatment. The highest concentration was the most efficient.Tétel Korlátozottan hozzáférhető Comparison of drying technologiesXaymounvong, Deuantavanh; Fekete, István; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis thesis is a comparison between drying technologies then at the end of the research one of the technology will be choosen as the most suitable, taking Laos economic situation in consideration. During the research, five different fruits are part of the experiment, going through three types of drying technology. After the dried sample are collected, further texture analysis will take place and the results will be analysed with illustrated graphs and explanation. Furthermore, organoleptic surveys are handed out to 20 participants, asking for opinions regarding taste, texture, appearance and smell. The result of organoleptic surveys will the analysed in section based on the technologies in order to see the difference from each categories (taste, texture, appearancee, smell). Lastly, all aspect from each analysis results are considered all together on average and then concluded which technology will be fast and the most benefitial after the implication of the drying technology in Laos.