Utjecaj atmosferske plinske plazme na inaktivaciju Escherichia coli

undergraduate thesis

• Title (english): Influence of atmospheric gas plasma on inactivation of Escherichia Coli
• Author: Andrej Cehulić
• Mentor: Zoran Herceg (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Engineering); (Laboratory for Food Processes Engineering); Zagreb
• Defense date and country: 2014-07-09, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

U radu je proučavan utjecaj atmosferske plinske plazme na Escherichia coli 3014. Za dobivanje plazme koristio se plemeniti plin argon. Vodena suspenzija Escherichia coli 3014 pripremljena je u čistoj kulturi. Uzorci su tretirani pri različitim uvjetima – vrijeme trajanja tretmana (3, 4 i 5 min), u različitom volumenu (2, 3 i 4 mL) i pri različitim protocima plina (0,75, 1 i 1,25 L/min). U pojedinim kombinacijama parametara je moguće postići potpunu inaktivaciju. Idealni uvjeti obrade suspenzija mikroorganizama obrađeni su statističkom metodom odzivne površine. Zaključeno je da volumen uzorka i duljina trajanja tretmana imaju značajno utječu na inaktivaciju Escherichia coli 3014.

Abstract (english)

This study explored the influence of atmospheric pressure gas-phase plasma on Escherichia coli 3014. For plasma generation the noble gas Argon was used. The culture was prepared in a pure aqueous suspension. The samples were treated at different lenghts (3, 4 and 5 min), in different volumes (2, 3 and 4 mL) and different gass flows (0.75, 1 and 1.25 L/min). In some combinations of the parameters it is possible to achieve complete inactivation. The parameters were studied with the statistical method response surface methodology. It was concluded that the lenght of the treatmant and the volume of the sample have a significant impact on the inactivation of the studied culture.

• Keywords: atmosferska plinska plazma; sterilizacija; responzivna površinska metoda
• Keywords (english): atmospheric pressure gas-phase plasma; sterilisation; responsive surface methodology
• Language: croatian
• URN:NBN: urn:nbn:hr:159:990941
• Study programme: Title: Food Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-04-27 07:47:00