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undergraduate thesis
Utjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi
2022. urn:nbn:hr:137:120334
Krasulja, Lara
University of Pula
Faculty of Natural Sciences

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Krasulja, L. (2022). Utjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi (Undergraduate thesis). Pula: University of Pula. Retrieved from https://urn.nsk.hr/urn:nbn:hr:137:120334

Krasulja, Lara. "Utjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi." Undergraduate thesis, University of Pula, 2022. https://urn.nsk.hr/urn:nbn:hr:137:120334

Krasulja, Lara. "Utjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi." Undergraduate thesis, University of Pula, 2022. https://urn.nsk.hr/urn:nbn:hr:137:120334

Krasulja, L. (2022). 'Utjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi', Undergraduate thesis, University of Pula, accessed 05 April 2025, https://urn.nsk.hr/urn:nbn:hr:137:120334

Krasulja L. Utjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi [Undergraduate thesis]. Pula: University of Pula; 2022 [cited 2025 April 05] Available at: https://urn.nsk.hr/urn:nbn:hr:137:120334

L. Krasulja, "Utjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi", Undergraduate thesis, University of Pula, Pula, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:137:120334

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Metadata
TitleUtjecaj veličine nanočestice srebra na toksičnost kod morskih makroalgi
Title (english)Investigating Silver nanoparticle size as a driver of toxicity in marine macroalgae
AuthorLara Krasulja
MentorDaniel Mark Lyons (mentor)
Committee memberPaolo Paliaga (predsjednik povjerenstva)
Committee memberAndrej Jaklin (član povjerenstva)
GranterUniversity of Pula
(Faculty of Natural Sciences)
Pula
Defense date and country2022-09-26, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Interdisciplinary Natural Sciences
Marine Science
Abstract
Velika proizvodnja i uporaba nanočestica srebra (AgNPs) može dovesti do ispuštanja istih u morski okoliš što posljedično može dovesti do smrtnosti različitih vrsta morskih organizama. Dosadašnja istraživanja dokazala su toksičnost AgNPs na morskim beskralješnjacima i fitoplanktonu, no nedostaju istraživanja učinka AgNPs na morskim makroalgama. Morske makroalge vrlo su važan dio morskog ekosustava. One obogaćuju morski okoliš kisikom, važna su hrana herbivornim vrstama organizama te pružaju... More stanište i skrovište različitim vrstama kralješnjaka i beskralješnjaka. Cilj rada bio je ispitati kako različite veličine nanočestica srebra utječu na toksičnost kod crvene morske makroalge Laurencia obtusa. Toksičnost AgNPs istraživana je pomoću biomarkera lipidne peroksidacije i sadržaja vodikovog peroksida koji ukazuju na oksidacijski stres. Talusi morske makroalge L. obtusa bili su izloženi AgNPs veličina 20 i 60 nm u koncentracijama od 1, 10 i 100 μg/mL tijekom 24 sata. Rezultati testa lipidne peroksidacije pokazali su najveću toksičnost Ag60 u koncentraciji od 100 μg/mL, a Ag20 nisu značajno utjecale na lipidnu peroksidaciju u L. obtusa. Rezultati sadržaja vodikovog peroksida također su ukazali na veću toksičnost Ag60, ali pri najnižoj ispitanoj koncentraciji. U oba testa AgNPs pokazale su veću toksičnost od Ag+ iona. Vidljivo je da u istraživanju s crvenim makroalgama veće AgNPs imaju veći toksični utjecaj. Potrebno je provesti daljnja istraživanja kako bi s većom sigurnošću bio određen utjecaj AgNPs na morske makroalge. Less
Abstract (english)
Large- scale production and use of silver nanoparticles (AgNPs) may lead to their release into the marine environment, which can consequently lead to the death of various marine organisms. Previous research has proven the toxicity of AgNPs to marine invertebrates and phytoplankton, but there are scarcely any data available on their effect on marine macroalgae. Marine macroalgae are a very important part of the marine ecosystem as they enrich the marine environment with oxygen, are... More important food for herbivorous species of organisms and provide a habitat and hiding place for different species of vertebrates and invertebrates. The aim of this work was to examine how different particle sizes modulates the toxicity of silver nanoparticles to the red marine macroalgae Laurencia obtusa. The toxicity of AgNPs was investigated using lipid peroxidation and hydrogen peroxide content as indicators of negative stress. The thalli of L. obtusa were exposed to AgNPs, of sizes of 20 and 60 nm, in concentrations of 1, 10 and 100 μg/mL for a period of 24 hours. The results of the lipid peroxidation test showed the highest toxicity from Ag60 at a concentration of 100 μg/mL, while Ag20 did not significantly affect toxicity towards L. obtusa. Hydrogen peroxide content also indicated greater toxicity of Ag60, but at the lowest tested concentration. In both tests, AgNPs typically showed greater lipid peroxidation and hydrogen peroxide generation than Ag+ ions. Furthermore, larger AgNPs were found to have a greater impact on toxicity. Ultimately, it is necessary to carry out further research to determine with greater certainty the impact of AgNPs on marine macroalgae using a wider range of endpoints. Less
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:137:120334
Study programmeTitle: University Undergraduate Study Programme - Marine Sciences
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) znanosti o moru (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) znanosti o moru)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-09-26 09:08:47
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