Analecta Technica Szegedinensia最新文献_第2页

Solid-phase extraction as promising sample preparation method for compound of emerging concerns analysis 固相萃取法是分析新关注化合物的理想样品制备方法

Analecta Technica Szegedinensia Pub Date : 2023-11-27 DOI: 10.14232/analecta.2023.4.16-24

Dušan Rakić, I. Antić, J. Živančev, Maja Buljovčić, Z. Šereš, N. Đurišić-Mladenović

{"title":"Solid-phase extraction as promising sample preparation method for compound of emerging concerns analysis","authors":"Dušan Rakić, I. Antić, J. Živančev, Maja Buljovčić, Z. Šereš, N. Đurišić-Mladenović","doi":"10.14232/analecta.2023.4.16-24","DOIUrl":"https://doi.org/10.14232/analecta.2023.4.16-24","url":null,"abstract":"Today’s environment is under the influence of numerous substances and most of them are not covered by current national and international regulations. Substances that are classified as contaminants of emerging concern, CECs, are not regulated nor systematically controlled in the environment, and they belong to the different chemical classes such as pesticides in current use, pharmaceutically active compounds (PhACs), personal care products, illicit drugs, hormones, micro- and nano-plastics, per- and poly-fluoroalkyl substances (PFAS), and many others. Once released CECs end up in surface water where they can be either accumulated or transported to the other environmental compartments, i.e. soil (by irrigation), underground water, or drinking water. The aim of the research was to investigate the efficiency of different selected solid-phase extraction (SPE) cartridges for preparation of water samples for simultaneous analysis of several CECs. For this purpose, a model mix solution of selected CECs in concentration relevant to environmental appearance was used. The selected CECs (14 PhACs, 11 pesticides in current use, and 4 PFAS) represented emerging contaminants with different properties, including polarities, and varying adverse effect on the environment and human health. Different types of sorbents were investigated: (i) commercial single-layer HLB, (ii) homemade multi-layer I: HLB plus a mix of WAX, WCX, and PPL, and (iii) multi-layer II: mix of WAX, WCX, and PPL plus HLB. The results revealed that the single-layer sorbent showed better efficiency in extraction of the analyzed CECs. Multi-layer sorbent should be further investigated to elucidate the possible reason for the poor extraction of some compounds, as development of a balanced extraction for a wider range of contaminants with different polarities, especially for non-target analysis of chemical residues, is required in order to capture the occurrence of the full profile of micropollutants.","PeriodicalId":213647,"journal":{"name":"Analecta Technica Szegedinensia","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139231768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of lab-scale gasification systems for different possible applications 为各种可能的应用开发实验室规模的气化系统

Analecta Technica Szegedinensia Pub Date : 2023-11-27 DOI: 10.14232/analecta.2023.4.25-33

Emese Sebe, Gábor Nagy, A. Kállay

引用次数: 0

The mechanical properties of biodegradable modified polymer packaging 可生物降解改性聚合物包装的机械性能

Analecta Technica Szegedinensia Pub Date : 2023-11-27 DOI: 10.14232/analecta.2023.4.34-39

Pál Patrik Dézsi, Z. Heiner, Gábor Gulyás, Katalin Pappné Sziládi

引用次数: 0

Examination of the Composition and Dielectric Properties of Wines from the Csongrád Wine Region Csongrád葡萄酒产区葡萄酒成分和介电性能的研究

Analecta Technica Szegedinensia Pub Date : 2023-07-13 DOI: 10.14232/analecta.2023.3.33-40

Blanka Juhász, Z. Jákói, Balázs Lemmer

引用次数: 0

Static and dynamic compression load tests of conically connected, screw fixed dental abutment 锥形连接螺钉固定牙基台静、动压缩载荷试验

Analecta Technica Szegedinensia Pub Date : 2023-07-13 DOI: 10.14232/analecta.2023.3.1-12

Győző Körtvélyessy, D. Hangyási, Tamás Tarjányi, Z. Tóth, Danica Matusovits, István Pelsőczi-Kovács, Z. Baráth

{"title":"Static and dynamic compression load tests of conically connected, screw fixed dental abutment","authors":"Győző Körtvélyessy, D. Hangyási, Tamás Tarjányi, Z. Tóth, Danica Matusovits, István Pelsőczi-Kovács, Z. Baráth","doi":"10.14232/analecta.2023.3.1-12","DOIUrl":"https://doi.org/10.14232/analecta.2023.3.1-12","url":null,"abstract":"The basis of the long-term success of dental implants is the mechanical stability of the implant and the superstructure anchored in it. In order to investigate the mechanical behaviour of the conical connection in implant-abutment units, static and dynamic load tests were performed with different conical angles and various Grade 4-5 titanium implant materials. The assembled units were mounted in self-developed loading machine and in an Instron ElectroPuls E3000 fatigue machine. For static loading, the samples were loaded with a force from 0 N to 500 N in steps of 100 N. For dynamic loading, the samples were loaded for 30,000 cycles with a force of 250 ± 150 N. In case of static testing, the compression caused by the load was measured in both horizontal and vertical directions, while in the case of dynamic fatigue, only horizontal deformation was defined. In both cases, the drive-out (reverse) torque values of the fixing screws were determined after loading. No significant differences were found between the tested materials in the reverse torque after the static load, however, significant differences were shown with regards to the alterations in cone angle (p < 0.001). After dynamic loading, significant differences (p < 0.001) were also observed between the reverse torques of the fixing screw in different angles. The static and dynamic test results showed the same tendency: under the same load conditions, the conical angle value of the implant-abutment connection revealed significant differences in the loosening of the fixing screw. In summary, it is recommended to use higher conical angle connection to avoid larger deformations in lengths and diameters of the implant at the connection and essential torque reduction of the fixing screw. Our results may contribute to the understanding of the long-term success of dental implants.","PeriodicalId":213647,"journal":{"name":"Analecta Technica Szegedinensia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133569968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monitoring the process of yogurt spoilage by dielectric measurements and spread plate method 用介电测量法和铺板法监测酸奶变质过程

Analecta Technica Szegedinensia Pub Date : 2023-07-13 DOI: 10.14232/analecta.2023.3.41-47

Réka Dobozi

引用次数: 0

The existence of gluten-free and functional pasta in Hungary 无麸质功能性面食在匈牙利的存在

Analecta Technica Szegedinensia Pub Date : 2023-07-13 DOI: 10.14232/analecta.2023.3.13-18

Krisztián Szűcs

引用次数: 0

Elemental Analysis of Contaminated Biomass Ashes for Phytomining of Rare Earth Elements 污染生物质灰中稀土元素的元素分析

Analecta Technica Szegedinensia Pub Date : 2023-07-13 DOI: 10.14232/analecta.2023.3.26-32

Truong Dinh Phi, Zsolt Dobó, H. Kovács

引用次数: 0

Merge in the Ethereum Blockchain 在以太坊区块链中合并

Analecta Technica Szegedinensia Pub Date : 2023-07-13 DOI: 10.14232/analecta.2023.3.19-25

András Bertalan, Balázs Gyenge, K. Kacz

{"title":"Merge in the Ethereum Blockchain","authors":"András Bertalan, Balázs Gyenge, K. Kacz","doi":"10.14232/analecta.2023.3.19-25","DOIUrl":"https://doi.org/10.14232/analecta.2023.3.19-25","url":null,"abstract":"The food industry has been at the forefront of rapid implementation for several technological innovations. One of the main reasons for this is that food security has been of paramount importance in supplying a growing population, taking into account both quantitative and qualitative requirements. And the necessary development could only be ensured by incorporating the latest developments. \u0000Blockchain technology is also a tool to consider in terms of how it can help track food chains. Its widespread application is only a decade old, but in some areas, for example, the operation of cryptocurrencies has already accumulated enough experience to see if it really lives up to the hopes attached to it, and what problems still stand in the way of further spread. \u0000With this material, our primary goal is to present a significant technological change that aims to solve one of the main problems of blockchain-based data management. It will be presented how the technology works (with a specific focus on the proof of work mechanism) and the transition to a truly significant platform, the proof of stake mechanism at Ethereum. This gives us an idea of how much a relatively new technology can undergo changes, and at what rate a seemingly significant problem (in this case, e.g. environmental impact) can decrease. This potential for development provides the basis for counting blockchains as a technology that can be applied in other areas, such as the food industry. \u0000In addition to scientific treatises, we often rely on Internet sources in the material, since the change occurred so quickly that publications in scientific journals could not yet track it or only in a narrower circle.","PeriodicalId":213647,"journal":{"name":"Analecta Technica Szegedinensia","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127409216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of photovoltaic systems on the behavior of harmonic components in low voltage network 光伏系统对低压电网谐波分量行为的影响

Analecta Technica Szegedinensia Pub Date : 2023-04-27 DOI: 10.14232/analecta.2023.2.32-47

R. Lipták, I. Bodnár

引用次数: 0