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1.
Synthesis, Structure and Antimicrobial Property of Green Composites from Cellulose, Wool, Hair and Chicken Feather
Gerald Benzi, Mladen Franko, Franja Prosenc, Chieu Tran, 2016, izvirni znanstveni članek

Opis: Novel composites between cellulose (CEL) and keratin (KER) from three different sources (wool, hair and chicken feather) were successfully synthesized in a simple one-step process in which butylmethylimidazolium chloride (BMIm+Cl-), an ionic liquid, was used as the sole solvent. The method is green and recyclable because [BMIm+Cl-] used was recovered for reuse. Spectroscopy (FTIR, XRD) and imaging (SEM) results confirm that CEL and KER remain chemically intact and homogeneously distributed in the composites. KER retains some of its secondary structure in the composites. Interestingly, the minor differences in the structure of KER in wool, hair and feather produced pronounced differences in the conformation of their corresponding composites with wool has the highest α-helix content and feather has the lowest content. These results correlate well with mechanical and antimicrobial properties of the composites. Specifically, adding CEL into KER substantially improves mechanical strength of [CEL+KER] composites made from all three different sources, wool, hair and chicken feathers (i.e., [CEL+wool], [CEL+hair] and [CEL+feather]. Since mechanical strength is due to CEL, and CEL has only random structure, [CEL+feather] has, expectedly, the strongest mechanical property because feather has the lowest content of α-helix. Conversely, [CEL+wool] composite has the weakest mechanical strength because wool has the highest α-helix content. All three composites exhibit antibacterial activity against methicillin resistant S. aureus (MRSA). The antibacterial property is due not to CEL but to the protein and strongly depends on the type of the keratin, namely, the bactericidal effect is strongest for feather and weakest for wool. These results together with our previous finding that [CEL+KER] composites can control release of drug such as ciprofloxacin clearly indicate that these composites can potentially be used as wound dressing.
Najdeno v: ključnih besedah
Ključne besede: Green synthesis, Ionic liquid, Keratin, Antibacteria, Wound dressing
Objavljeno: 08.06.2016; Ogledov: 3219; Prenosov: 0
.pdf Polno besedilo (4,41 MB)

2.
Facile synthesis, structure, biocompatibility and antimicrobial property of gold nanoparticle composites from cellulose and keratin
Mladen Franko, Franja Prosenc, Chieu D. Tran, 2018, izvirni znanstveni članek

Opis: A novel, one-pot method was developed to synthesize gold nanoparticle composite from cellulose (CEL), wool keratin (KER) and chloroauric acid. Two ionic liquids, butylmethylimmidazolium chloride and ethylmethylimmidazolium bis(trifluoromethylsulfonyl)imide were used to dissolve CEL, KER and HAuCl4. X-ray diffraction and X-ray photoelectron results show that Au3+ was completely reduced to Au0NPs with size of (5.5 ± 1) nm directly in the composite with NaBH4. Spectroscopy and imaging results indicate that CEL and KER remained chemically intact and were homogeneously distributed in the com- posites with Au0NPs. Encapsulating Au0NPs into [CEL+KER] composite made the composite fully biocom- patible and their bactericidal capabilities were increased by the antibacterial activity of Au0NPs. Specifically, the [CEL+KER+Au0NPs] composite exhibited up to 97% and 98% reduction in growth of antibi- otic resistant bacteria such as vancomycin resistant Enterococcus faecalis and methicillin resistant Staphylococcus aureus, and was not cytotoxic to human fibroblasts. While [CEL+KER] composite is known to possess some antibacterial activity, the enhanced antibacterial observed here was due solely to added Au0NPs. These results together with our previous finding that [CEL+KER] composites can be used for con- trolled delivery of drugs clearly indicate that the [CEL+KER+Au0NPs] composites possess all required properties for successful use as dressing to treat chronic ulcerous infected wounds.
Najdeno v: ključnih besedah
Povzetek najdenega: ...Ionic liquid Green Sustainable Polysaccharide Keratin Wound dressing Gold nanoparticles Antibiotic-resistant bacteria...
Ključne besede: Ionic liquid Green Sustainable Polysaccharide Keratin Wound dressing Gold nanoparticles Antibiotic-resistant bacteria
Objavljeno: 27.09.2017; Ogledov: 3026; Prenosov: 0
.pdf Polno besedilo (2,44 MB)

3.
Recovery of bioactive components from fruit processing wastes
Branka Mozetič Vodopivec, 2019, objavljeni znanstveni prispevek na konferenci

Najdeno v: ključnih besedah
Povzetek najdenega: ...processing wastes, green extraction methods, polyphenols...
Ključne besede: processing wastes, green extraction methods, polyphenols
Objavljeno: 23.08.2019; Ogledov: 1965; Prenosov: 1
.pdf Polno besedilo (616,59 KB)
Gradivo ima več datotek! Več...

4.
Capabilities of hydrogen-producing green algae Clamydomonas reinhardtii for copper bioremediation in wastewaters
Urška Žvab, Danijel Stojković, Matjaž Valant, 2019, objavljeni povzetek znanstvenega prispevka na konferenci

Najdeno v: ključnih besedah
Ključne besede: copper, hydrogen, wastewater, green algae, Clamydomonas reinhardtii
Objavljeno: 19.12.2019; Ogledov: 1865; Prenosov: 0
.pdf Polno besedilo (18,68 MB)

5.
Importance of pedestrianization for urban regeneration. Assessing new bridge solutions for the Golden Horn
Pinar Özge Gezer, 2020, magistrsko delo

Opis: The Golden Horn (in Turkish Halic means Gulf or Altın Boynuz "Golden Horn") is a historic inlet of the Bosphorus dividing the city of İstanbul and forming the natural harbor that has sheltered Ottoman and other ships for thousands of years. It is a scimitar-shaped estuary that joins the Bosphorus just at the point where that strait enters the Sea of Marmara, thus forming a peninsula the tip of which is "Old İstanbul". This thesis work focuses on design proposal for the pedestrian bridge for Golden Horn Dis-trict, which links the royal and later historical peninsula to the rest of the city. The main challenge of the thesis is creation of continuous pedestrian network to guarantee uninter-rupted pedestrian connectivity as well as systematic activation of social and environmental urban regeneration.
Najdeno v: ključnih besedah
Povzetek najdenega: ...Horn, historical penninsula, connection, transportation, cultural park, green areas, attraction points, İstanbul, Leonardo Da Vinci...
Ključne besede: bridge, pedestrianization, walkability, Golden Horn, historical penninsula, connection, transportation, cultural park, green areas, attraction points, İstanbul, Leonardo Da Vinci
Objavljeno: 28.02.2020; Ogledov: 1895; Prenosov: 71
.pdf Polno besedilo (20,12 MB)

6.
Der Trend geht zu Austerität und Mauerbau
Gal Kirn, 2019, polemika, diskusijski prispevek, komentar

Najdeno v: ključnih besedah
Povzetek najdenega: ...new walls, right populism, oxi, problems of green capitalism, individualisation of collective politics...
Ključne besede: austerity, Tsipras, EU, new walls, right populism, oxi, problems of green capitalism, individualisation of collective politics
Objavljeno: 22.09.2020; Ogledov: 1254; Prenosov: 0
.pdf Polno besedilo (471,10 KB)

7.
European Progressive Future? Neither Yesterday’s Tsipras nor Today’s Greens
galTh kirn, 2019, polemika, diskusijski prispevek, komentar

Najdeno v: ključnih besedah
Povzetek najdenega: ...eu elections, tsipras, green, austerity, failure to unite, individualisation...
Ključne besede: eu elections, tsipras, green, austerity, failure to unite, individualisation
Objavljeno: 18.09.2020; Ogledov: 1047; Prenosov: 0

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