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Title:Temeljne študije interakcij in fizikalno-kemijskih lastnosti sintetiziranega nanokompozita na osnovi magnetnih nanodelcev ter polisaharida za potencialno magnetno-vodljiv antikoagulant : magistrsko delo
Authors:ID Farkaš, Tilen (Author)
ID Simonič, Marjana (Mentor) More about this mentor... New window
ID Plohl, Olivija (Comentor)
Files:.pdf MAG_Farkas_Tilen_2026.pdf (7,43 MB)
MD5: 603BF06667B8C96F851EEAB34547EB6E
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Preučevanje ključne vloge antikoagulantov v sodobni medicinski praksi, zlasti njihove osrednje funkcije pri preprečevanju nenormalnega strjevanja krvi, je bistvenega pomena za razvoj varnejših biomaterialov, ki prihajajo v stik s krvjo. Kljub znatnemu napredku na tem področju ostajajo interakcije med krvnimi proteini in alternativnimi antikoagulativnimi nanopovršinami premalo raziskane. V tem magistrskem delu smo raziskali nov pristop, ki vključuje neposredno oplaščenje magnetnih nanodelcev železovega oksida (MNPs) z anionskim polisaharidom fukoidanom, z namenom ovrednotenja potenciala magnetno odzivnih MNPs, oplaščenih s fukoidanom, kot mogoč magnetno-vodljivi antikoagulantni nanomaterial. Fizikalno-kemijska karakterizacija sintetiziranih nanodelcev je vključevala oceno morfologije, vrednotenje površinskih in elektrokinetičnih lastnosti, termogravimetrično analizo ter magnetne meritve. Rezultati so potrdili uspešno funkcionalizacijo MNPs s fukoidanom pri različnih pogojih ter prisotnost funkcionalnih skupin, ki izkazujejo antikoagulantni učinek, na površini nanodelcev. Oplaščeni nanodelci so ohranili superparamagnetno vedenje, hkrati pa so pri fizioloških pogojih izkazovali izboljšano koloidno stabilnost in izrazit negativen površinski naboj pri fiziološkem pH krvi. Antikoagulantni potencial nanokompozitov smo raziskali s standardiziranim testom aktiviranega delnega tromboplastinskega časa (aPTT), ki je pokazal podaljšanje časa strjevanja krvi s spremembo koncentracije. Poleg tega smo uporabili modificiran pristop s kremenovo kristalno mikrotehtnico z disipacijsko enoto (QCM-D) za preučevanje adsorpcije proteinov, vključenih v kaskado tvorjenja strdkov, in medpovršinskih interakcij. Časovno odvisne študije z modelnim krvnim proteinom fibrinogenom so pokazale zmanjšano adsorpcijo proteinov na površinah, oplaščenih s fukoidanom, kar kaže na izboljšano hemokompatibilnost sintetiziranih nanodelcev napram neoplaščenim MNPs. Zaključimo lahko, da MNPs, oplaščeni s fukoidanom, predstavljajo obetavno strategijo za razvoj magnetno-vodljivih, biokompatibilnih in funkcionalno aktivnih antikoagulantnih nanomaterialov za napredne biomedicinske aplikacije.
Keywords:fukoidan, magnetni nanodelci, interakcije, antikoagulanti, biomedicinske aplikacije
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[T. Farkaš]
Year of publishing:2026
Number of pages:1 spletni vir (1 datoteka PDF (XIII, 82 str.))
PID:20.500.12556/DKUM-98184 New window
UDC:547.458:615.273(043.2)
COBISS.SI-ID:285073923 New window
Publication date in DKUM:16.07.2026
Views:271
Downloads:24
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:23.05.2026

Secondary language

Language:English
Title:Fundamental investigations of the interactions and physicochemical properties of synthesized nanocomposite based on magnetic nanoparticles and polysaccharide for potential magnetically controlled anticoagulant
Abstract:Investigating the crucial role of anticoagulants in modern medical practice, particularly their central function in preventing abnormal blood clotting, is essential for the development of safer blood-contacting biomaterials. Despite significant progress in this field, the interactions between blood proteins and alternative anticoagulant nanosurfaces remain insufficiently explored. Thus, in this master's thesis, we investigated a novel approach involving the direct coating of magnetic iron oxide nanoparticles (MNPs) with the anionic polysaccharide fucoidan, aiming to evaluate the potential of magnetically responsive fucoidan-coated MNPs as a potentially magnetically-guided anticoagulant nanomaterial. The physicochemical characterization of the synthesized nanoparticles included morphology assessment, evaluation of surface and electrokinetic properties, thermogravimetric analysis, and magnetic measurements. The results confirmed the successful functionalization of MNPs with fucoidan and the presence of functional groups exhibiting an anticoagulant effect on the surface of the nanoparticles. The coated NPs retained their superparamagnetic behavior while simultaneously exhibiting improved colloidal stability and a pronounced negative surface charge under physiological conditions in the near of physiological blood pH. The anticoagulant potential of the nanocomposites was investigated using the standardized activated partial thromboplastin time (aPTT) assay, which demonstrated a concentration-dependent prolongation of the blood clotting time. Furthermore, we utilized a modified approach with a quartz crystal microbalance with dissipation monitoring (QCM-D) to study the adsorption of proteins involved in the coagulation cascade and interfacial interactions. Time dependent studies with the model blood protein fibrinogen revealed reduced protein adsorption on the fucoidan coated surfaces, indicating improved hemocompatibility of the synthesized nanoparticles compared to uncoated MNPs. Overall, the findings suggest that fucoidan-coated MNPs represent a promising strategy for the development of magnetically guided, biocompatible, and functionally active anticoagulant nanomaterials for advanced biomedical applications.
Keywords:fucoidan, magnetic nanoparticles, interactions, anticoagulants, biomedical applications


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