Search Results

You are looking at 1 - 3 of 3 items for

  • Author or Editor: Ivett Kovács x
  • Refine by Access: All Content x
Clear All Modify Search

Abstract

The laboratory micro X-ray diffraction (μ-XRD) technique is a suitable method to study minerals in-situ in whole-rock specimens without any sample preparation or in polished thin sections, and even in small amounts in powdered form. The micro X-ray diffraction method uses the conventional, closed-tube X-ray generator, but modifications were needed in the diffraction column, sample holder and detector in order to achieve μ-XRD capability.

In this paper, we present a case study of the capillary method used in µ-XRD on hydrothermal clay mineral assemblages that formed in the Velence Mts (Hungary). The capillary method in µ-XRD has many advantages in the investigation of small amounts of clay minerals: (1) easy and rapid preparation of randomly oriented, powdered samples; (2) rapid measurements; (3) accurate diffraction patterns. By using the capillary method, the formation of preferred orientation can be eliminated; thus the (hkl) reflection of the clay minerals can be precisely measured. Illite polytype quantification and the investigation of (060) reflection of clay minerals can be used satisfactorily in µ-XRD.

Hydrothermal clay mineral assemblages are indicative of temperature and pH. Their examination can determine the physicochemical parameters of the hydrothermal fluids that interacted with the host granite in the Velence Mts. The analyzed hydrothermal clay minerals from the western part of the mountains suggest lower temperatures (150–200 °C) and intermediate pH conditions. In contrast, the clay mineral assemblages' characteristics for the eastern part of the mountains indicate more intense argillization and higher temperatures (∼220 °C) and intermediate pH conditions.

Open access

Abstract

In Hungary, the teacher qualification and promotion system was extended with the missing Master teacher grade in 2016. The analysis of the five-year plans of the Master teacher candidates provides an opportunity to get an overview of the vision of experienced and highly qualified teachers about the current situation and the potentials of the educational sector. The research explores the Master programmes of 95 Master teacher candidates from the early years sector to understand what issues they identify in their everyday work, which motivates them for professional learning and for setting innovative goals. The qualitative research uses document analysis to explore the programmes that is followed by semi-structured interviews. The Master kindergarten teachers consider teacher fluctuation and the changes in the legislation the main issues that induce extra tasks to deal with. They also plan to enrich their practice with innovative methods. Collaborative methods for professional learning and planning are frequently mentioned in the programmes, but the terrain of knowledge sharing is mainly their community of practice. Even though opposition is visible in the teachers' attitude against the qualification network, the majority of the Master teachers claim to consider their master programme as an enhancement of their professional work.

Open access

Veseátültetés utáni sebészeti szövődmények előfordulása a Clavien-beosztás szerint, különös tekintettel a húgyvezeték-anastomosis típusára

Surgical complications after kidney transplantation based on the Clavien classification, especially with regard to the types of ureteral anastomoses

Orvosi Hetilap
Authors: Lóránt Illésy, Roland Fedor, Dávid Ágoston Kovács, Zsolt Kanyári, Gergely Zádori, Gergő József Szőllősi, Márton Kovács, Tibor Flaskó, Judit Tóth, Richárd Veisz, Ivett Belán, and Balázs Nemes

Összefoglaló. Bevezetés: Veseátültetést követően a graft és a beteg túlélésére hatással lehetnek a posztoperatív intervenciót igénylő szövődmények. Fontos szempont a műtéttechnikai eredményesség monitorozása. Többek között az irodalomban számos lehetőség ismert a veseátültetés sarokpontjának számító ureteranastomosis elkészítésére is, de az éranastomosisok technikája szintén döntő lehet. Célkitűzés és módszer: Retrospektíven vizsgáltuk a 2010 és 2020 között végzett veseátültetéseket a Debreceni Egyetem Sebészeti Klinikáján. Célul tűztük ki a sebészeti szövődmények vizsgálatát, melyeket rendszereztünk, a módosított Clavien-féle beosztás alapján. A legnagyobb figyelmet az ureteranastomosisokra fordítottuk. Minden betegnél az adott kategóriában legsúlyosabb szövődményt vettük alapul a beosztáshoz. A minimális utánkövetési idő 1 év volt. Az adatokat az SPSS statisztikai program segítségével elemeztük. Eredmények: A vizsgált periódusban 406 veseátültetés történt, melyből 24,4% (n = 99) vesetranszplantáltnál alakult ki intervenciós (sebészeti, radiológiai, urológiai) szövődmény. A betegek átlagéletkora 49,5 ± 13,7 év, 60,8% férfi volt. A kumulatív mortalitás 10,1% volt. Grade 4-es szövődmény a betegek 6,9%-ánál (n = 28), Grade 3-as a 6,7%-ánál (n = 27), Grade 2-es a 3%-ánál (n = 12), Grade 1-es a 7,9%-ánál (n = 32) jelentkezett. A veseátültetés után 20,4%-ban (n = 83) alakult ki későn induló graftfunkció. Következtetés: A legenyhébb kategóriába (Grade 1.) került a legtöbb beteg, a szövődmények jelentős része sebészi, intervenciós radiológiai és urológiai közreműködéssel megoldható volt. Az ureteranastomosisok műtéti technikája és a releváns szövődmények kialakulása között nincs szignifikáns összefüggés. Megfelelő és időben alkalmazott korrekciós kezelés mellett a graft- és betegtúlélést nem rontja szignifikánsan az enyhe és középsúlyos (Grade 1–3.) szövődmények kialakulása. Orv Hetil. 2021; 162(26): 1038–1051.

Summary. Introduction: Complications associated with postoperative intervention may affect graft and patient survival after kidney transplantation. Monitoring the effectiveness of surgery is an important aspect. Ureter anastomosis can be the pivot of kidney transplant, the same as vascular anastomosis, so efficiency of the surgical technique is important to follow up. Objective and method: We retrospectively examined kidney transplants performed between 2010 and 2020 at the Department of Surgery of the University of Debrecen. Data were analyzed by the SPSS statistical program. We aimed to investigate surgical complications, which were systematized based on the modified Clavien classification. In one patient, the most severe complication was used as the basis for the schedule. The minimum follow-up time was 1 year. Results: 406 kidney transplants were performed in the examined period, of which 24.4% (n = 99) developed renal transplant complications (surgical, radiological, urological). The mean age of the patients was 49.5 ± 13.7 years, and 60.8% were male. The cumulative mortality was 10.1%. Grade 4 complication developed in 6.9% (n = 28) of the recipients, Grade 3 in 6.7% (n = 27), Grade 2 in 3% (n = 12), and Grade 1 in 7.9% (n = 32). 20.4% of the recipients had delayed graft function. Conclusion: The Grade 1 group had the biggest case number, so a significant part of the complications could be solved with the help of interventional radiology and urologists. There is no significant association between the surgical technique of ureteral anastomoses and the development of related complications. With appropriate therapy, graft and patient survival are not significantly impaired by the development of Grade 1–3 complications. Orv Hetil. 2021; 162(26): 1038–1051.

Open access