@{MTMT:30398055, title = {Kongruens fázisváltást biztosító hőtároló mikrokapszulák, eljárás előállításukra és alkalmazásuk}, url = {https://m2.mtmt.hu/api/publication/30398055}, author = {Feczkó, Tivadar and Fodorné Kardos, Andrea and Gyenis, János and Németh, Bence and Szemesné Németh, Ágnes and Tóth, Judit}, unique-id = {30398055}, abstract = {A találmány mag-héj szerkezetű hőtároló mikrokapszulára vonatkozik, amelynek fázisváltó hőtároló anyagot tartalmazó magja és amorf, üvegszerű állapotú alginát bevonata van, amely bevonat legalább kétrétegű és legalább az egyik réteg nanorészecskéket tartalmaz, továbbá a mag és a bevonat felszínei közvetlenül vagy térközzel érintkeznek, továbbá a mikrokapszula magja tömör, vagy belső üreget tartalmaz. A találmány kiterjed a mikrokapszula előállítására és alkalmazására.}, year = {2018}, orcid-numbers = {Gyenis, János/0000-0001-5928-0535} } @article{MTMT:3379592, title = {Fully bio-originated latent heat storing calcium alginate microcapsules with high coconut oil loading}, url = {https://m2.mtmt.hu/api/publication/3379592}, author = {Németh, Bence László and Szemesné Németh, Ágnes and Ujhidy, Aurél and Tóth, Judit and Trif, László and Gyenis, János and Feczkó, Tivadar}, doi = {10.1016/j.solener.2018.05.066}, journal-iso = {SOL ENERGY}, journal = {SOLAR ENERGY}, volume = {170}, unique-id = {3379592}, issn = {0038-092X}, year = {2018}, eissn = {1471-1257}, pages = {314-322}, orcid-numbers = {Trif, László/0000-0002-3960-1829; Gyenis, János/0000-0001-5928-0535} } @{MTMT:3223672, title = {Nyújtott hatóanyagleadású terápiás és diagnosztikus nanorészecskék}, url = {https://m2.mtmt.hu/api/publication/3223672}, author = {Tóth, J and Fodorné-Kardos, A and Szemesné Németh, Ágnes and Gyenis, János and Feczkó, T}, booktitle = {Műszaki Kémiai Napok 2016}, unique-id = {3223672}, year = {2016}, pages = {139-139}, orcid-numbers = {Gyenis, János/0000-0001-5928-0535} } @{MTMT:3223662, title = {Optimisation of the microencapsulation process of paraffin type phase change materials into Ca-alginate biopolymer by experimental design}, url = {https://m2.mtmt.hu/api/publication/3223662}, author = {Németh, Bence László and Szemesné Németh, Ágnes and Tóth, J and Fodorné Kardos, Andrea and Göllei, Attila and Gyenis, János and Feczkó, T and Ujhidy, Aurél}, booktitle = {Műszaki Kémiai Napok 2016}, unique-id = {3223662}, year = {2016}, pages = {80-80}, orcid-numbers = {Gyenis, János/0000-0001-5928-0535} } @{MTMT:3055131, title = {Microencapsulation and properties of paraffin type phase change materials (PCMs) into „green” polymer}, url = {https://m2.mtmt.hu/api/publication/3055131}, author = {Németh, Bence and Szemesné Németh, Ágnes and Tóth, Judit and Fodorné Kardos, Andrea and Göllei, Attila and Gyenis, János and Feczkó, Tivadar}, booktitle = {Műszaki Kémiai Napok 2015: Chemical Engineering Days 2015}, unique-id = {3055131}, year = {2015}, pages = {58-58} } @article{MTMT:3004096, title = {Stability of β-D-galactosidase covalently immobilized onto chitosan microparticles}, url = {https://m2.mtmt.hu/api/publication/3004096}, author = {Emese, Biro and Daniel, Budugan and Szemesné Németh, Ágnes and Francisc, Peter}, journal-iso = {J AGROALIMENTARY}, journal = {JOURNAL OF AGROALIMENTARY PROCESSES AND TECHNOLOGIES}, volume = {21}, unique-id = {3004096}, issn = {1453-1399}, year = {2015}, eissn = {2068-9551}, pages = {315-324} } @article{MTMT:2937897, title = {Consolidated microcapsules with double alginate shell containing paraffin for latent heat storage}, url = {https://m2.mtmt.hu/api/publication/2937897}, author = {Németh, Bence László and Szemesné Németh, Ágnes and Tóth, Judit and Fodorné Kardos, Andrea and Gyenis, János and Feczkó, Tivadar}, doi = {10.1016/j.solmat.2015.07.029}, journal-iso = {SOL ENERG MAT SOL C}, journal = {SOLAR ENERGY MATERIALS AND SOLAR CELLS}, volume = {143}, unique-id = {2937897}, issn = {0927-0248}, abstract = {Double-shell alginate microcapsules containing paraffin phase change material (PCM) were prepared for latent heat storage by a method of repeated interfacial coacervation/crosslinking. The proposed process consisted of three main steps: (1) preparation of paraffin containing core particles by dripping an O/W emulsion of melted paraffin and aqueous sodium alginate into a calcium chloride ionic cross-linking solution, (2) encapsulation of the core particles into double alginate shell by ionic gelation/crosslinking by repeated interactions between the sodium alginate and calcium chloride solutions, and (3) consolidation of the capsule shells by contact heat treatment. The effects of process parameters such as the sodium alginate concentration, the calcium chloride concentration in certain stages of the process, and the contact time between the formed core particles and the surrounding alginate solution on the paraffin content and the mean diameter of capsules were studied by experimental design and statistical evaluations. The prepared PCM capsules had uniform sizes, core/shell structure, double-walled non-porous alginate coating, tunable void space inside the core, and suitably high paraffin content at properly selected process conditions, corresponding to 95.0 J/g melting and 91.7 J/g freezing latent heat capacity. Thermogravimetric analysis and repeated thermal cycling evidenced good thermal stability, and proper mechanical strength for leakage free microcapsules.}, year = {2015}, eissn = {1879-3398}, pages = {397-405}, orcid-numbers = {Gyenis, János/0000-0001-5928-0535} } @misc{MTMT:2551126, title = {Bacteria surface adhesion monitored by OWLS}, url = {https://m2.mtmt.hu/api/publication/2551126}, author = {Kovács, Boglárka and Farkas, Enikő and Patkó, Dániel and Szemesné Németh, Ágnes and Vonderviszt, Ferenc and Horváth, Róbert}, unique-id = {2551126}, year = {2013}, orcid-numbers = {Patkó, Dániel/0000-0002-3553-2213; Vonderviszt, Ferenc/0000-0002-6498-8172; Horváth, Róbert/0000-0001-8617-2302} } @inproceedings{MTMT:1847695, title = {Mikotoxin-szennyezettség változása és hatása a kukorica-alapú bioetanol előállítási folyamatban. Effects and changes of micotoxin contamination in the process of corn-based bioethanol production}, url = {https://m2.mtmt.hu/api/publication/1847695}, author = {Prettl, Zsolt and Lepossa, Anita and Tóth, Éva and Kelemenné Horváth, Ilona and Szemesné Németh, Ágnes and Nagy, Endre}, booktitle = {Műszaki Kémiai Napok 2011 = Conference of Chemical Engineering 2011}, unique-id = {1847695}, year = {2011}, pages = {21-25}, orcid-numbers = {Tóth, Éva/0000-0001-9788-6757} } @article{MTMT:1304247, title = {Three-step experimental design to determine the effect of process parameters on the size of chitosan microspheres}, url = {https://m2.mtmt.hu/api/publication/1304247}, author = {Biró, Emese and Szemesné Németh, Ágnes and Feczkó, Tivadar and Tóth, Judit and Sisak, C and Gyenis, János}, doi = {10.1016/j.cep.2008.10.001}, journal-iso = {CHEM ENG PROCESS}, journal = {CHEMICAL ENGINEERING AND PROCESSING}, volume = {48}, unique-id = {1304247}, issn = {0255-2701}, abstract = {Investigation was carried out to elucidate the influence of process parameters on the mean particle size of chitosan microspheres produced by water-in-oil (w/o) emulsion crosslinking method. The aqueous chitosan solution was dispersed in the oil phase composed of 40% (v/v) sunflower oil and 60% (v/v) n-hexadecane in the presence of Tween 80 surfactant. The droplets were solidified and hardened by glutaraldehyde crosslinking agent. The particle size of the obtained microspheres was influenced by four independent process variables, such as stirring rate, and the concentrations of chitosan, Tween 80 and glutaraldehyde. To study these effects, 4-factorial 3-level Box-Behnken type experimental design and statistical analysis of the experimental results were carried out in three consecutive steps. First, the 4 independent factors at 3 levels were taken into consideration without repetitions, resulting in 27 scheduled experiments. Second, the design was completed by further experiments to check the effects of some of the variables at five levels both inside and outside the original factor intervals used in the first step. In addition, five repeated experiments at the central points of the four factors were also involved in the second step to determine the pure error. In order to elucidate the effects of process variables on the mean particle size, non-linear multidimensional regression was determined. Third, the less significant effects were neglected resulting in a simplified model equation that proved to be suitable for the prediction of the mean particle size as a function of the studied process parameters. (c) 2008 Elsevier B.V. All rights reserved.}, year = {2009}, eissn = {1873-3204}, pages = {771-779}, orcid-numbers = {Gyenis, János/0000-0001-5928-0535} }