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2. Breaking free from PFAS : biocompatible, durable and high-performance octenyl succinic anhydride (OSA)-modified starch/chitosan coating with ZnO for textile applicationsAnja Verbič, Blaž Stres, Ivan Jerman, Barbara Golja, Ema Žagar, Vuk Martinović, Petja Logar, Gregor Lavrič, Anže Prašnikar, Blaž Likozar, Uroš Novak, Ana Oberlintner, 2025, izvirni znanstveni članek Povzetek: The development of textile coatings as alternatives to per- and polyfluoroalkyl substances (PFAS) is a high priority due to global regulatory efforts aiming to phase out PFAS, driven by alarming environmental contamination and significant human health concerns. To address the urgent need for replacements, this research develops a health-friendly hydrophobic coating for two of the most common textile substrates, cotton and polyester. The developed coating, consisting of chitosan matrix and octenyl succinic anhydride-modified starch in synergy with ZnO, achieved water contact angles up to 132°. A successful transition to industrial application provided a translucent and homogeneous hydrophobic protection, without noticeably affecting the material's physical properties. Maintained or improved mechanical properties, supported by FTIR analysis, indicate a benign coating process that provides fiber reinforcement. Durability is demonstrated through multiple washing cycles without decrease in hydrophobicity, and high abrasion resistance (min. 20,000 cycles), winning against its commercial fluorinated counterpart. The water-repellent properties show stability over a longer period of time (min. 230 days). The biodegradability study confirmed the environmental compatibility as the biopolymer coating decomposed in 8 days. Finally, multivariate statistical analysis determined an optimal coating process to ensure effective integration of the newly developed sustainable coating into textile manufacturing processes.
Ključne besede: chitosan, octenyl succinic anhydride, modified starch, biopolymer, hydrophobic coating, functional textile
Objavljeno v DiRROS: 20.06.2025; Ogledov: 142; Prenosov: 91
 Celotno besedilo (6,58 MB)
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3. Bilateral acrylic hip mold arthroplasty in a child with a revision 60 years after implantation : Clinical case and chemical analysis of endoprosthetic materialSamo Roškar, Ingrid Milošev, Rene Mihalič, Ema Žagar, Rihard Trebše, 2024, izvirni znanstveni članek Povzetek: A 68-year-old man was referred due to bilateral hip pain and gradual deterioration of walking. He had mold arthroplasties on both hips at the age of 7 years and has been functioning well for more than 5 decades. However, the original data on operative report and the prostheses were missing. The radiological examination revealed bilateral broken prosthetic material. Thus, stage bilateral revision total hip arthroplasty was performed. A detailed chemical analysis of retrieved mold arthroplasty implants proved that the acrylic material was noted to be the same composition with the difference in appearance likely being related to different thermal treatments originally applied to the implants. As presented in our clinical case, even obsolete implants may have good survivorship. According to the case presented, total hip arthroplasty could be considered an effective option with the desired functional outcome when conservative and joint-preserving measures are exhausted
Objavljeno v DiRROS: 17.04.2025; Ogledov: 248; Prenosov: 57
Celotno besedilo (1,87 MB) |
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7. Structural basis for the multitasking nature of the potato virus Y coat proteinAndreja Kežar, Luka Kavčič, Martin Pólak, Jiři Nováček, Ion Gutiérrez-Aguirre, Magda Tušek-Žnidarič, Anna Coll Rius, Katja Stare, Kristina Gruden, Maja Ravnikar, David Pahovnik, Ema Žagar, Franci Merzel, Gregor Anderluh, Marjetka Podobnik, 2019, izvirni znanstveni članek Povzetek: Potato virus Y (PVY) is among the most economically important plant pathogens. Using cryoelectron microscopy, we determined the near-atomic structure of PVY’s flexuous virions, revealing a previously unknown lumenal interplay between extended carboxyl-terminal regions of the coat protein units and viral RNA. RNA–coat protein interactions are crucial for the helical configuration and stability of the virion, as revealed by the unique near-atomic structure of RNA-free virus-like particles. The structures offer the first evidence for plasticity of the coat protein’s amino- and carboxyl-terminal regions. Together with mutational analysis and in planta experiments, we show their crucial role in PVY infectivity and explain the ability of the coat protein to perform multiple biological tasks. Moreover, the high modularity of PVY virus-like particles suggests their potential as a new molecular scaffold for nanobiotechnological applications.
Ključne besede: plant pathogens, potato virus Y, viral RNA
Objavljeno v DiRROS: 23.07.2024; Ogledov: 674; Prenosov: 406
Celotno besedilo (4,43 MB)
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