25 research outputs found
Comparative analysis of Hungarian commercial apple juices
In recent years, 100% fruit juices have become increasingly popular among consumers. Beverages made from apples include a wide range of products, interest being particularly grate in direct press juices and products of organic farming that are produced “chemical-free”. Our objective is to compare 100% apple juices produced using different technologies, which are commercially available in Hungary, by the complex analysis of some of their quality parameters. For the tests, 12 varieties of 100% apple juices were used. The patulin contamination of the products was checked with the help of the Food and Feed Safety Directorate of the National Food Chain Safety Office by means of an HPLC-UV measurement following a special clean-up. The hydroxymethylfurfural content of the products were determined by spectrophotometry, antioxidant capacity by FRAP (Ferric Reduction Antioxidant Power), CUPRAC (Cupric Ion Reducing Antioxidant Capacity), DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS (2,2’-azino-bis(3-ethylbenzothiazoline6-sulfonic acid) methods based on radical neutralization, and the total polyphenol content by the Folin-Ciocalteu method. Total dry matter content and ash content were determined by gravimetry, while the total soluble dry matter content was determined by refractometry. For the evaluation of the results, descriptive statistical analyses, variance analysis, non-parametric statistical tests, Spearman rank correlation and a statistical method based on sum of rank differences (SRD) multicriteria comparison were used. The patulin contamination did not reach the maximum legal limit value for any of the products. Significant differences were found between the total and soluble dry matter contents of the various product groups. The ash content varies, but there is no significant difference between the two product categories. In general, the hydroxymethylfurfural content is higher in the case of products manufactured from concentrate, however, it was a press juice that contained extreme amounts of this compound. In the case of press juices, higher antioxidant activities and polyphenolic compound contents were found by all method. There are significant differences between the individual products in terms of the latter parameters (p<0.05). Using the SRD method, it was determined which of the products tested possessed the most optimal characteristics from a nutrition science point of view. The product groups tested differ significantly from each other in terms of almost all of the parameters measured. In general, the dry matter content of the press juices is higher, as a result of the fiber content. These products have higher antioxidant capacity values and polyphenolic compound contents, so they are nutritionally more beneficial. The latter parameters correlate well with each other, indicating the dominance of polyphenols in the development of antioxidant properties
A mesĂ©lĹ‘szĂ©k mint kidolgozott nyelvi kĂłdot fejlesztĹ‘ eszköz a Step by Step alternatĂv oktatásban
A tanulmányban a Romániában nĂ©pszerű alternatĂv oktatási forma, a Step by Step egyik pedagĂłgiai
eszközĂ©t, a mesĂ©lĹ‘szĂ©k vizsgálatára kerĂĽl sor Basil Bernstein nyelvi kĂłdok elmĂ©letĂ©nek segĂtsĂ©gĂ©vel. A
2021/2022-es tanĂ©v tavaszi fĂ©lĂ©vĂ©ben zajlĂł kvalitatĂv kutatás során egy partiumi magyar nyelvű iskolában
vĂ©geztĂĽnk megfigyelĂ©seket Ă©s vettĂĽnk fel fĂ©lig strukturált egyĂ©ni interjĂşkat olyan alsĂłs tanĂtĂłkkal, akik
minden nap alkalmazzák a mesélőszéket (n=11). Az interjúk tanulsága szerint a mesélőszék működésében
felismerhetők azon elemek, amelyek a kidolgozott nyelvi kódra jellemzőek. A vizsgált pedagógiai eszköz
oldja a megĂ©rtĂ©s szituáciĂłhoz kötöttsĂ©gĂ©t, a törtĂ©net egyedĂĽli ismerĹ‘jekĂ©nt mesĂ©lnek a gyerekek, Ăgy
játékosan ösztönzi őket arra, hogy változatos nyelvi eszközökkel adják át élményeiket az osztálynak,
mialatt úgy kapnak teret a szabad önkifejezésre, hogy az „én” nem alávetett a „mi”-nek. A mesélőszék által
közelebb kerĂĽlhet egymáshoz az otthon Ă©s az iskola szimbĂłlumrendszere, s a kĂ©t világ közötti hĂd
Ă©pĂtĂ©sĂ©ben – a mesĂ©lĹ‘szĂ©knek köszönhetĹ‘en – a nyelv lehet segĂtsĂ©gĂĽkre
Hazai kereskedelmi forgalomban kaphatĂł almalevek minĹ‘sĂ©gi paramĂ©tereinek összehasonlĂtása
Az elmĂşlt Ă©vekben a fogyasztĂłk körĂ©ben egyre nĂ©pszerűbbek a 100%-os gyĂĽmölcstartalmĂş gyĂĽmölcslevek. Az almábĂłl előállĂtott italok szĂ©les termĂ©kpalettán mozognak, kĂĽlönösen nagy az Ă©rdeklĹ‘dĂ©s a közvetlen prĂ©slevek, illetve a »vegyszermentesen” előállĂtott, ökolĂłgiai gazdaságbĂłl származĂł áruk iránt. CĂ©lunk a kĂĽlönbözĹ‘ technolĂłgiákkal előállĂtott, hazai kereskedelmi forgalomban kaphatĂł, 100% gyĂĽmölcstartalmĂş almalevek összehasonlĂtása nĂ©hány, minĹ‘sĂ©get befolyásolĂł paramĂ©terĂĽk komplex vizsgálatával. A vizsgálathoz 12 fajta 100% gyĂĽmölcstartalmĂş almalevet használtunk. EllenĹ‘riztĂĽk a termĂ©kek patulin-szennyezettsĂ©gĂ©t, speciális tisztĂtást követĹ‘ HPLC-UV mĂ©rĂ©ssel a NĂ©bih Élelmiszer- Ă©s Takarmánybiztonsági IgazgatĂłságának közreműködĂ©sĂ©vel. Spektrofotometriásán meghatároztuk a termĂ©kek hidroximetil-furfurol tartalmát, az antioxidáns kapacitást FRAP (Ferric Reduction Antioxidant Power), CUPRAC (Cupric Ion Reducing Antioxidant Capacity), DPPH (1,1 -difenil-2-pikrilhidrazil) Ă©s ABTS (2,2’-azinodi-(3-etilbenzotiazolin)-6-szulfoninsav) gyöksemlegesĂtĂ©sen alapulĂł mĂłdszerekkel, valamint az összes polifenolos vegyĂĽlet-tartalmat Folin-Ciocalteu mĂłdszerrel. Az összes szárazanyag-tartalmat Ă©s a hamutartalmat gravimetriásán, az összes oldhatĂł szárazanyag-tartalmat refraktometriásán határoztuk meg. Az eredmĂ©nyek Ă©rtĂ©kelĂ©sĂ©hez leĂrĂł statisztikai elemzĂ©seket, varianciaanalĂzist, nem paramĂ©teres statisztikai prĂłbákat, Spearman-fĂ©le rangkorreláciĂłt, valamint a „rangszámkĂĽlönbsĂ©gek összege” (sum of rank differences, SRD) multikritĂ©riumos összehasonlĂtáson alapulĂł statisztikai mĂłdszert alkalmaztuk. Patulin-szennyezettsĂ©g egy termĂ©k esetĂ©ben sem Ă©rte el a rendeletileg meghatározott maximális határĂ©rtĂ©ket. Az összes Ă©s az oldhatĂł szárazanyag-tartalomban termĂ©kcsoportonkĂ©nt szignifikáns kĂĽlönbsĂ©geket tapasztaltunk. A hamutartalom változĂł, de szignifikáns eltĂ©rĂ©s a kĂ©t termĂ©kkategĂłria között nem áll fenn. A hidroximetil-furfurol-tartalom általánosságban a koncentrátumbĂłl előállĂtott termĂ©kek esetĂ©ben magasabb, azonban kiugrĂł mennyisĂ©gben mĂ©gis egy prĂ©slĂ© tartalmazta a vegyĂĽletet. A prĂ©slevek esetĂ©ben minden mĂłdszerrel magasabb antioxidáns aktivitás Ă©s polifenolos vegyĂĽlettartalom-Ă©rtĂ©keket tapasztaltunk. UtĂłbbi paramĂ©terekben az egyes termĂ©kek között szignifikáns eltĂ©rĂ©sek mutatkoznak (p<0,05). Az SRD mĂłdszerrel megállapĂtottuk, hogy a vizsgált termĂ©kek közĂĽl melyek rendelkeznek táplálkozástudományi szempontbĂłl optimálisabb tulajdonságokkal. A vizsgált termĂ©kcsoportok egymástĂłl szinte minden mĂ©rt paramĂ©ter alapján szignifikánsan kĂĽlönböznek. A prĂ©slevek szárazanyag-tartalma általánosságban magasabb, amely a rosttartalom következmĂ©nye. Ezek a termĂ©kek magasabb antioxidáns kapacitás Ă©rtĂ©kekkel, Ă©s polifenolos vegyĂĽlet-tartalommal rendelkeznek, Ăgy táplálkozás-Ă©lettani szempontbĂłl kedvezĹ‘bbek. UtĂłbbi paramĂ©terek egymással jĂłl korrelálnak, amely a polifenolok dominanciáját jelzi az antioxidáns tulajdonságok kialakĂtásában
Relationships amongst phenylthiocarbamide sensitivity, body composition, coffee and tea consumption
Polymorphisms of TAS2R38 gene responsible for bitter taste perception elicit a bimodal receptor response in the population upon the detection of phenylthiocarbamide and 6-n-propylthiouracil, respectively. Genetic differences in sensitivity to phenylthiocarbamide and 6-n-propylthiouracil may affect body composition, food preferences, and frequency of consuming different food types. To date, no publication has been published in Hungary on the joint study of these factors. The aim of the present research is to find correlations between phenylthiocarbamide taster status and body composition, and the frequency of consumption of different bitter-tasting foods. In the study, a taster status survey of participants (n = 170), a bioimpedance-based body composition analysis (n = 96) and completed a food frequency questionnaire of bitter foods (n = 170) were conducted. Descriptive statistical methods, cross-tabulation analysis, multiple correspondence analysis, and Mann-Whitney test were used for data analysis at 5% significance level. The proportions of the taster and non-taster categories proved to be the same as reported by international literature (70%/30% respectively). There were no significant correlations among taster status and the other examined parameters, however, based on the multiple correspondence analysis, the observed trends are in accordance with the international literature. There were significant correlations among gender, body composition and some variables describing food preference. Based on the literature data and our own results, there can be a relationship between genotype and body composition, and genotype and food choice. Further analyses with large-sample size and representative research are needed to substantiate these assumptions
Discrimination Ability of Assessors in Check-All-That-Apply Tests: Method and Product Development
Binary similarity measures have been used in several research fields, but their application in sensory data analysis is limited as of yet. Since check-all-that-apply (CATA) data consist of binary answers from the participants, binary similarity measures seem to be a natural choice for their evaluation. This work aims to define the discrimination ability of CATA participants by calculating the consensus values of 44 binary similarity measures. The proposed methodology consists of three steps: (i) calculating the binary similarity values of the assessors, sample pair-wise; (ii) clustering participants into good and poor discriminators based on their binary similarity values; (iii) performing correspondence analysis on the CATA data of the two clusters. Results of three case studies are presented, highlighting that a simple clustering based on the computed binary similarity measures results in higher quality correspondence analysis with more significant attributes, as well as better sample discrimination (even according to overall liking)
A feniltiokarbamid érzékenység összefüggései a testösszetétellel, valamint a kávé- és teafogyasztással
A TAS2R38 keserű Ăz Ă©rzĂ©kelĂ©sĂ©Ă©rt felelĹ‘s receptor-gĂ©n polimorfizmusai bimodális receptor választ váltanak ki a populáciĂłban a feniltiokarbamid, illetve a 6-n-propiltiouracil Ă©rzĂ©kelĂ©se során. A feniltiokarbamiddal Ă©s a 6-n-propiltiouracillal szembeni Ă©rzĂ©kenysĂ©g genetikai eltĂ©rĂ©sei irodalmi adatok alapján befolyásolhatják a testösszetĂ©telt, az Ă©lelmiszer preferenciákat Ă©s az Ă©lelmiszerek fogyasztási gyakoriságát. Hazánkban eddig ezeknek a faktoroknak az egyĂĽttes vizsgálatával kapcsolatban mĂ©g nem szĂĽletett publikáciĂł. Jelen kutatás cĂ©lja összefĂĽggĂ©sek keresĂ©se a feniltiokarbamid taster státusz Ă©s a testösszetĂ©tel, valamint a kĂĽlönbözĹ‘ keserű Ăzű Ă©lelmiszerek fogyasztási gyakorisága között. A vizsgálat során elvĂ©geztĂĽk a rĂ©sztvevĹ‘k taster státusz felmĂ©rĂ©sĂ©t (n = 170), bioelektromos impedancia alapĂş testösszetĂ©tel-meghatározását (n = 96). A rĂ©sztvevĹ‘k ezen tĂşlmenĹ‘en kitöltöttek egy keserű Ă©lelmiszerekre vonatkozĂł fogyasztási gyakorisági kĂ©rdĹ‘Ăvet (n = 170). Az adatelemzĂ©shez leĂrĂł statisztikai mĂłdszereket, kereszttábla-elemzĂ©st, többszörös korrespondencia-analĂzist (Multiple Correspondence Analysis), valamint Mann-Whitney prĂłbát használtunk, 5%-os szignifikanciaszinten. A taster Ă©s non-taster kategĂłriák arányai megegyeznek a nemzetközi szakirodalomban közölt adatokkal (rendre 70%/30%). A taster státusz Ă©s a többi vizsgált paramĂ©ter között nem adĂłdott szignifikáns összefĂĽggĂ©s, azonban a többszörös korrespondencia analĂzis alapján a nemzetközi szakirodalommal egybevágĂł tendenciák figyelhetĹ‘k meg. A nemek Ă©s a testösszetĂ©tel, valamint az Ă©lelmiszerpreferenciák egyes változĂłi között szignifikáns összefĂĽggĂ©s mutathatĂł ki. A szakirodalmi adatok, Ă©s saját eredmĂ©nyeink alapján nem zárhatĂł ki, hogy összefĂĽggĂ©s áll fenn a genotĂpus Ă©s a testösszetĂ©tel, valamint az Ă©lelmiszerválasztás között. További, nagymintás, reprezentatĂv kutatások eredmĂ©nyei szĂĽksĂ©gesek a feltĂ©telezĂ©sek igazolásához
ESTIMATION OF THE POTENTIAL RUNOFF QUALITY IMPROVEMENT AS A RESULT OF APPLIED GREEN INFRASTRUCTURE MEASURES IN A HUNGARIAN TOWN
Green infrastructure measures provide several services – improves the microclimate of a town, improves air quality, decreases noise and improves the quality of surface and subsurface waters as well along with increasing the water balance on the town level. These facts are proved by several studies which will be quoted in the study. The aim of the study is to estimate the potential runoff quality improvement as a result of applying green infrastructure elements along traffic roads in the town. This improvement is of high priority in the aquifer protection area from where runoff water may infiltrate into the aquifer carrying with it pollutants from the surface. Estimations is going to be applied on more levels, first we determine the surface of traffic roads, then estimate the quantity of different kinds of pollutants accumulated on the surface and thirdly we estimate the expected performance of the applied green infrastructure elements based on findings in the literature in this topic. We determine the impervious urban surface area associated with transport-related functions within the protected drinking water recharge area using GIS technic using available orthophotos. We introduce data regarding the roads with the densest traffic in 2016. within the investigated area. We estimate the expected reduction of runoff pollution if sustainable storm water management practices are applied in the area. The overall goal is to make the significance of diffuse pollution more obvious and enhance drinking water protection through taking diffuse pollution into consideration
Purchasing Bakery Goods during COVID-19: A Mind Genomics Cartography of Hungarian Consumers
At both global and national levels, COVID-19 caused huge changes both in politics and economics, including the agricultural sector and the food industry, from producers, manufacturers, and traders to consumers. Since March 2020, many restrictions and protective measures were introduced worldwide, which only began to be relaxed in the last weeks of spring 2021 as the number of people vaccinated against the coronavirus increased in Hungary. The aim of this study was to investigate the attitudes of Hungarian consumers toward food purchases during the COVID-19 pandemic, in terms of safety. The research was based on the purchase of bakery products, which are basic food products and are most often found in an unpackaged form in Hungarian stores. The BimiLeap® study, a revolutionary tool for uncovering people’s minds, was completed by 125 participants, gathered by a snowballing technique. There were no significant differences among consumers’ attitudes based on the traditional socio-demographic descriptors; however, the mindset-based classification was able to differentiate significantly. The three identified mindsets covered people who themselves consider bakery products, the purchase method, and being in the store as the highest risk of a potential COVID infection