Vpliv kobalt feritnih nanodelcev na rast sončnice (helianthus annuus l.) : diplomsko delo

Brudar, Nina (avtor), Vogel-Mikuš, Katarina (mentor)

Feritni nanodelci imajo magnetne lastnosti in jih zaradi tega uporabljajo v energetiki, medicini in elektroniki. Posledice uporabe se lahko kažejo v onesnaženosti prsti, industrijskih odpadnih vodah, in ne nazadnje ta negativni vpliv občutijo tudi organizmi. Sproščanje kobaltovih ionov iz feritnih nanodelcev ima negativen vpliv na rast in razvoj rastlin. Glavni cilj moje diplomske naloge je bil ugotoviti, kako različne koncentracije raztopin kobaltovega ferita in kobaltovega klorida vplivajo na rast in razvoj sončnice (Helianthus annuus L.). V predhodni raziskavi so bile rastline gojene dva tedna v hranilni raztopini z dodanimi različnimi koncentracijami (1 mg/L, 10 mg/L, 100 mg/L) kobaltovega ferita (CoFe2O4) in koncentracijami (1 mg/L, 10 mg/L, 100 mg/L) kobaltovih ionov v kobaltovem kloridu (CoCl2). Na rastlinah sem izmerila dejansko in potencialno fotokemično učinkovitost fotosistema II (FS II). Iz vsake skupine rastlin sem vzela korenine in poganjke ter jih pripravila za merjenje fotosinteznih pigmentov. Vsak vzorec sem stehtala in tako dobila svežo in suho maso. Pridobljene podatke smo analizirali s standardnimi statističnimi metodami. Z našo raziskavo smo ugotovili, da so bile tretirane rastline - v primerjavi s kontrolo - pod stresom, in sicer so imele nižjo fotokemično učinkovitost fotosistema II (FS II), manjšo suho maso in nižje koncentracije klorofila a in b.

• Jezik: Slovenski jezik
• Ključne besede: sončnica, kobalt feritni nanodelci, kobaltov klorid
• Vrsta gradiva: Diplomsko delo/naloga
• Tipologija: 2.11 - Diplomsko delo
• Organizacija: PEF - Pedagoška fakulteta
• Založnik: [N. Brudar]
• Leto izida: 2015
• Št. strani: V, 23 str.
• PID: 20.500.12556/RUL-72650
• UDK: 582.991.131:546.73(043.2)
• COBISS.SI-ID: 10704457
• Datum objave v RUL: 29.09.2015

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Effect of cobalt ferrite nanoparticles on the growth of sunflower (Helianthus annuus L.)

Izvleček

Ferrite nanoparticles possess magnetic properties and are therefore used in energy, medicine and electronics. The consequences of their use can be seen in soil pollution and industrial effluents and even organisms feel these negative effects. The generation of cobalt ions from ferrite nanoparticles has a negative impact on the growth and development of plants. The main objective of this dissertation was to determine how different concentrations of cobalt ferrite and cobalt chloride in solution affect the growth and development of a sunflower (Helianthus annuus L.). In a prior study, plants were grown in nutrient solution with different concentrations (1 mg/L, 10 mg/L, 100 mg/L) of cobalt ferrite (CoFe2O4) and concentrations (1 mg/L, 10 mg/L, 100 mg/L) of cobalt ions in cobalt chloride (CoCl2) for two weeks. We measured the actual and potential photochemical efficiency of photosystem II (PSII) in plants. We separated roots and shoots from every group of plants and prepared them to quantify measure photosynthetic pigments. Fresh and dry mass were determined by weighing each sample. We analysed the obtained data using standard statistical methods. In our research, we established that in comparison with the control group, the treated plants were stressed as they had a lower photochemical efficiency of photosystem II (PSII), a lower dry mass and lower concentrations of chlorophyll a and b.

• Ključne besede: cobalt ferrite nanoparticles