Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima

Jelenković, David

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master's thesis

Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima

Zagreb: University of Zagreb, Faculty of Science, 2012. urn:nbn:hr:217:139756

Jelenković, David

University of Zagreb
Faculty of Science
Department of Biology

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APA 6th Edition

Jelenković, D. (2012). Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:139756

MLA 8th Edition

Jelenković, David. "Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima." Master's thesis, University of Zagreb, Faculty of Science, 2012. https://urn.nsk.hr/urn:nbn:hr:217:139756

Chicago 17th Edition

Harvard

Jelenković, D. (2012). 'Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima', Master's thesis, University of Zagreb, Faculty of Science, accessed 19 April 2024, https://urn.nsk.hr/urn:nbn:hr:217:139756

Vancouver

Jelenković D. Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2012 [cited 2024 April 19] Available at: https://urn.nsk.hr/urn:nbn:hr:217:139756

IEEE

D. Jelenković, "Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2012. Available at: https://urn.nsk.hr/urn:nbn:hr:217:139756

Cite this item: https://urn.nsk.hr/urn:nbn:hr:217:139756

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Title	Učinak silicija na virnjaka Polycelis felina (Daly.) u laboratorijskim uvjetima
Title (english)	The effect of silicon on the planarian Polycelis felina (Daly.) in laboratory conditions
Author	David Jelenković
Mentor	Mirjana Kalafatić (mentor)
Committee member	Zdravko Dolenec (predsjednik povjerenstva)
Committee member	Mirjana Kalafatić (član povjerenstva)
Committee member	Zora Popović (član povjerenstva)
Granter	University of Zagreb Faculty of Science (Department of Biology) Zagreb
Defense date and country	2012-02-17, Croatia
Scientific / art field, discipline and subdiscipline	NATURAL SCIENCES Biology
Abstract	Silicij je jedan od najčešćih elemenata u Zemljinoj kori. Esencijelan je element kod nekih nižih oblika života. Kod viših oblika nije poznata njegova biološka uloga. Do sada nije proučavan učinak silicija na vrstu Polycelis felina (Daly.) u laboratorijskim uvjetima, koja je pogodan testni organizam u citotoksikološkim istraživanjima. Planarije su tretirane s 6 koncentracija: 0,17 g/dm3, 0,20 g/dm3, 0,23 g/dm3, 0,25 g/dm3, 0,27 g/dm3 i 0,30 g/dm3 natrijevog metasilikata i praćene tokom četrnaest dana. Praćena su: smrtnost, morfološke promjene, promjene u ponašanju, te histološko–citološke promjene. Rezultati su uspoređeni s jednom negativnom i dvije pozitivne kontrolne skupine. Ovim pokusom utvrđeno je da natrijev metasilikat, ovisno o dozi primijenjene koncentracije, izaziva smrtnost, depigmentaciju, promjene u ponašanju, dezorijentirano kretanje, intenzivne kontrakcije dijela tijela i decefalizaciju. Na histološkim preparatima vidljivo je oštećenje mukuznog sloja i bazalne membrane, te svih staničnih struktura. Analizom tkiva utvrđena je velika prisutnost silicija u tijelu planarije.
Abstract (english)	Silicon is one of the most frequent element in Earth Crust. It is an essential element at lower live forms. Its biological function in higher forms of live is not known. Silicon effect on Polycelis felina (Daly.), which is convenient test organism in such studies, has not been analyzed in laboratory yet. Planarian were treated with 6 different concentrations: 0,17 g/dm3, 0,20 g/dm3, 0,23 g/dm3, 0,25 g/dm3, 0,27 g/dm3 and 0,30 g/dm3 of sodium metasilicate and monitored in period of 14 days. Followed changes were mortality rate, morphological, behavioral and histological-cytological changes. Results where compared with one negative and two positive control group. With this experiment it has been established that sodium metasilicate, depending of dosage of applied concentration, causes: mortality, depigmentation, behavioral changes, disorientated movement, intensive contraction and decefalization. On histological slides there is visible damage of mucus layer and basal membrane as all cellular structures. With tissue analysis a great amount of silicone was found in the body of planarian.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:217:139756
Study programme	Title: Integrated undergraduate and graduate university study of Biology and Chemistry Education; specializations in: Integrated undergraduate and graduate university study of Biology and Chemistry Education Course: Integrated undergraduate and graduate university study of Biology and Chemistry Education Study programme type: university Study level: integrated undergraduate and graduate Academic / professional title: magistar/magistra edukacije biologije i kemije (magistar/magistra edukacije biologije i kemije)
Type of resource	Text
File origin	Born digital
Access conditions	Access restricted to students and staff of home institution
Terms of use
Repository	Repository of the Faculty of Science
Created on	2017-05-02 08:26:23

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