Yazar "Demirbaş, Ayşe" için listeleme
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Anthocyanins-rich berry extracts directed formation of Ag NPs with the investigation of their antioxidant and antimicrobial activities
Demirbaş, Ayşe; Yılmaz, Vedat; Ildız, Nilay; Baldemir, Ayşe; Ocsoy, İsmail (Elsevier Science Bv, 2017)Herein we report anthocyanins-rich berries (Rubus fruticosus L (blackberry); Fragaria vesca L (strawberry) and Rubus idaeus L (raspberry)) extracts directed silver nanoparticles (Ag NPs) and systematically investigate their ... -
Bio-synthesis of graphene oxide-decorated silver nanocomposites using Usnea antarctica and Umbilicaria antarctica from Antarctic Peninsula and evaluation of their antimicrobial activities
Koca, Fatih Doğan; Demirbaş, Ayşe; Halıcı, Mehmet Gökhan; Öcsoy, İsmail (Springer, 2024)In this study, silver@graphene oxide nanocomposites (Ag@GO NCs) derived from extracts of Antarctic lichens Usnea antarctica and Umbilicaria antarctica were synthesized and their antimicrobial activity against to fish ... -
Biosynthesis of silver nanoparticles and their versatile antimicrobial properties
Some, Sudip; Sen, Ipsita Kumar; Mandal, Amitava; Aslan, Tuğrul; Üstün, Yakup; Yılmaz, Ebru Şebnem; Katı, Ahmet; Demirbaş, Ayşe; Mandal, Amit Kumar; Ocsoy, İsmail (Iop Publishing Ltd, 2019)Silver nanoparticles (AgNP) have been used for over a century for many purposes including as germicides. Unique physical, chemical and biological properties of Ag NPs make them suitable for a wide range of applications in ... -
Comparison study of synthesized red (or Blood) orange peels and juice extract-nanoflowers and their antimicrobial properties on Fish Pathogen (Yersinia ruckeri)
Demirbaş, Ayşe (Springer, 2021)In this work, we synthesized blood orange peel extract-copper (II) (Cu2+) ions nanoflower (NFs) and blood orange juice extract-copper (II) (Cu2+) ions nanoflower examine their antimicrobial properties on the fish pathogen ... -
Facile synthesis of hybrid nanoflowers using glycine and phenylalanine and investigation of their catalytic activity
Demirbaş, Ayşe; Karslı, Barış; Öcsoy, İsmail (Wiley, 2023)In the context of the proposed work, two different amino acids (Glycine, Phenylalanine) have interacted with copper ions in a phosphate buffer (PBS) in place of enzymes. This interaction resulted in the nucleation of copper ... -
Formation of functional nanobiocatalysts with a novel and encouraging immobilization approach and their versatile bioanalytical applications
Çelik, Çağla; Taşdemir, Didar; Demirbaş, Ayşe; Kati, Ahmet; Gül, O. Tolga; Çimen, Behzat; Öcsoy, İsmail (Royal Soc Chemistry, 2018)The discovery of functional organic-inorganic hybrid nanoflowers (FNFs) consisting of proteins/enzymes as the organic components and Cu(ii) ion as the inorganic component has made an enormous impact on enzyme immobilization ... -
Formation of umbilicaria decussata (antarctic and Turkey) extracts based nanoflowers with their peroxidase mimic, dye degradation and antimicrobial properties
Demirbaş, Ayşe; Karslı, Barış; Dadı, Şeyma; Arabacı, Nihan; Koca, Fatih Doğan; Halıcı, M.Gökhan; Öcsoy, İsmail (Wiley, 2023)This work describes a unique and environmentally friendly approach for creating three-dimensional (3D) organic-inorganic flower shaped hybrid nanostructures called "nanoflower (NF)" by using Umbilicaria decussate (U. ... -
Green synthesis of silver nanoparticles using aqueous extracts of three Sideritis species from Turkey and evaluations bioactivity potentials
Ceylan, Ramazan; Demirbaş, Ayşe; Öcsoy, İsmail; Aktümsek, Abdurrahman (Elsevier, 2021)The members of the genus Sideritis have a wide variety of phytochemicals and thus the genus are gaining interest to fabricate nanoparticles (via green synthesis) as sources reducing or stabilizer agents. In the present ... -
Heavy metal concentration levels and biometric analysis of Liocarcinus depurator from different locations on the western Black Sea coast of Turkey
Demirbaş, Ayşe; Gözler, Ahmet Mutlu; Baytaşoğlu, Hazel; Kaya, Cüneyt (Springer, 2021)The aim of the current work is to examine the concentrations of nine heavy metals such as chromium, nickel, copper, cadmium, zinc, cobalt, iron, lead, and metal (aluminium) in two body parts (carapace and walking legs) of ... -
Investigation of ellagic acid rich-berry extracts directed silver nanoparticles synthesis and their antimicrobial properties with potential mechanisms towards Enterococcus faecalis and Candida albicans
Ekrikaya, Semiha; Yılmaz, Ebubekir; Çelik, Çağla; Demirbuğa, Sezer; Ildız, Nilay; Demirbaş, Ayşe; Öcsoy, İsmail (Elsevier, 2021)The essential goals of this present study are to elucidate the formation mechanism of ellagic acid rich-blackberry, BBE, (Rubus fruticosus L.) and raspberry, RBE, (Rubus idaeus L.) extracts directed silver nanoparticles ... -
One step preparation of stable gold nanoparticle using red cabbage extracts under UV light and its catalytic activity
Ünal, İlay Sema; Demirbaş, Ayşe; Önal, İrem; Ildiz, Nilay; Öcsoy, İsmail (Elsevier Science Sa, 2020)Herein, we have reported the synthesis, characterization and catalytic activity of highly stable gold nanoparticles (Au NPs) using red cabbage extract (RCE) under UV irradiation. the anthocyanin groups predominantly existing ... -
Organic-inorganic nanocomposites of aspergillus terreus extract and its compounds with antimicrobial properties
Uras, İbrahim Şeyda; Karslı, Barış; Konuklugil, Belma; Öcsoy, İsmail; Demirbaş, Ayşe (MDPI, 2023)Due to its distinct, atypical features and possible applications, three-dimensional (3D) hierarchical nanoflowers have sparked considerable interest. Copper (II) ions were employed as inorganic components in this study, ... -
Organik bileşik olarak Altin Çilek (Physalis peruviana) kabuk ve meyve özütü ile çiçek şekilli hibrit nanoyapıların gıda patojenleri üzerine antibakteriyel etkisinin ıncelenmesi ve bu nanoyapıların morfolojik karşılaştırılması
Demirbaş, Ayşe (2021)Bu çalışmada, altın çilek meyve ekstresi-bakır (II) (Cu2+) iyonları nanoflower (hNFs) (çiçek şekilli hibrit nanoyapılar) ve altın çilek kabuk ekstresi-bakır (II) (Cu2+) iyonları nanoflower (hNFs) sentezlendi. Ve bu ... -
Parazoanthus axinellae extract incorporated hybrid nanostructure and its potential antimicrobial activity**
Konuklugil, Belma; Uras, İbrahim Şeyda; Karslı, Barış; Demirbaş, Ayşe (Wiley, 2023)This study, it was aimed to examine the change in the antimicrobial effect of sea anemone Parazoanthus axinellae extract by forming its nanoflowers. A scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy ... -
Preparation of biocompatible and stable iron oxide nanoparticles using anthocyanin integrated hydrothermal method and their antimicrobial and antioxidant properties
Demirbaş, Ayşe; Kışlakcı, Emine; Karaağaç, Zehra; Önal, İrem; Ildiz, Nilay; Öcsoy, İsmail (Iop Publishing Ltd, 2019)Recently, biosynthesis of nanoparticles (NPs) using plants extract have been received considerable attention owing to production of biocompatible and water-soluble NPs. in addition to that, low cost, freely availability, ... -
Synthesis of axinyssa digitata extract directed hybrid nanoflower and investigation of its antimicrobial activity
Karslı, Barış; Uras, İbrahim Şeyda; Konuklugil, Belma; Demirbaş, Ayşe (IEEE, 2022)First time in this study, the antibacterial effects of sponge extracts and -based cupper hybrid nanoflowers (Cu hNFs) were evaluated. Herein, hybrid nanoflowers (Cu hNFs) were produced by combining sponge extract with Cu2+ ... -
Synthesis of long-term stable gold nanoparticles benefiting from red raspberry (Rubus idaeus), strawberry (Fragaria ananassa), and Blackberry (Rubus fruticosus) extracts-gold Ion complexation and investigation of reaction conditions
Demirbaş, Ayşe; Büyükbezirci, Kasım; Çelik, Çağla; Kışlakcı, Emine; Karaağaç, Zehra; Göktürk, Ersen; Katı, Ahmet; Çimen, Behzat; Yılmaz, Vedat; Öcsoy, İsmail (Amer Chemical Soc, 2019)We report synthesis of monodispersed, stable, and colloidal gold nanoparticles (Au NPs) using anthocyanin-riched red raspberry (Rubus idaeus), strawberry (Fragaria ananassa), and blackberry (Rubus fruticosus) extracts as ... -
Synthesis of taurine-Cu-3(PO4)(2) hybrid nanoflower and their peroxidase-mimic and antimicrobial properties
Yılmaz, Sevim Gökçe; Demirbaş, Ayşe; Karaağaç, Zehra; Dadı, Şeyma; Çelik, Çağla; Yusufbeyoğlu, Şadi; Ildız, Nilay; Mandal, Amit Kumar; Çimen, Behzat; Öcsoy, İsmail (Elsevier, 2022)Herein, we report the synthesis of taurine incorporated (sulfur containing organic molecule derived from methionine and cysteine) hybrid nanoflowers (thNFs) with an intrinsic peroxidase-mimic and antimicrobial activities ... -
Usnea antarctica (James Ross Island, Antarctica) and usnea subfloridana (Uludag, Turkey) Incorporated hybrid nanoflowers with their intrinsic catalytic and antimicrobial activities
Demirbaş, Ayşe; Karslı, Barış; Dadı, Şeyma; Koca, Fatih Doğan; Halıcı, M.Gökhan; Öcsoy, İsmail (Wiley, 2022)Herein, we used lichen extracts, for the first time, in formation of organic-inorganic nanoflowers and we utilized them as novel nanobiocatalyst and antimicrobial agents. Two lichen species, Usnea Antarctica (U. Antarctica) ...
