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Facile biogenic selenium nanoparticle synthesis, characterization and effects on oxidative stress generated by UV in microalgae

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Particuology 2022年第11期70卷 30-42页

作者： Sena Kardelen Dinc Oznur Akbal Vural Figen Esin Kayhan nalan oya san Keskin PolatlıScience and Literature Faculty Nanosan LaboratoryAnkara HacıBayram Veli UniversityAnkara 06900Turkey Advanced Technologies Application and Research Center Hacettepe UniversityAnkara 06900Turkey Science and Literature Faculty Biology DepartmentMarmara UniversityIstanbul 34722Turkey

Since nanoparticle synthesis via chemical and physical methods is expensive and includes hazardous chemicals,biosynthesis has emerged as an environmentally friendly,clean and viable *** present study reports the synthesis of selenium nanoparticles(SeNPs)using Citricoccus sp..For the production of SeNPs,the influence of some parameters(time,pH,temperature and stirring rate)was *** synthesis conditions were found as pH 8,24 h reaction time,37℃ and 150 *** particles were spherical and were 104.46±50.82 nm with a zeta potential of–20.43±0.41 ***,the effects of the nanoparticles on oxidative stress biomarkers,hydrogen peroxide(H_(2)O_(2)),malondialdehyde(MDA),chlorophyll(a+b)and growth rate,subsequent to UV-C irradiation on Chlorella vulgaris were *** culture contains nanoparticle and UV-C exposed,the amount of H_(2)O_(2) and MDA decreased on the 1st,3rd and 7th days following UV exposure compared to UV-applied group,while optical density and cell density increased,the amount of chlorophyll(a+b)changes were statistically ***,it has been shown that the synthesized SeNPs alleviated the adverse effects of UV stress in microalgae.

关键词： Chlorella vulgaris Green synthesis Nanoparticles Oxidative stress

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Novel one-step synthesis of silica nanoparticles from sugarbeet bagasse by laser ablation and their effects on the growth of freshwater algae culture

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Particuology 2014年第6期12卷 29-35页

作者： nalan oya san Canan Kursung?z Yasin Tümtas ?ncay Yasa Bülend Orta? Turgay Tekinay Polath Science and Literature Faculty Biology DepartmentGazi University Life Sciences Application and Research Center Gazi University UNAM Institute of Materials Science and Nanotechnology Bilkent University

Scientific research involving nanotechnology has grown exponentially and has led to the development of engineered nanoparticles（NPs）.Silica NPs have been used in numerous scientific and technological applications over the past decade,necessitating the development of efficient methods for their *** studies have explored the potential of laser ablation as a convenient way to prepare metal and oxide *** to its high silica content,low cost,and widespread availability,sugarbeet bagasse is highly suitable as a raw material for producing silica NPs via laser *** this study,two different NP production methods were investigated：laser ablation and NaOH *** developed a novel,one-step method to produce silica NPs from sugarbeet bagasse using laser ablation,and we characterized the silica NPs using environmental scanning electron microscopy（ESEM）,energy dispersive spectrometry（EDS）,dynamic light scattering（DLS）,transmission electron microscopy（TEM）,attenuated total reflectanceFourier transform infrared spectroscopy（ATR-FT1R）,X-ray photoelectron spectroscopy（XPS） and Raman *** analysis and XPS confirmed the presence of silica *** NPs produced by laser ablation were smaller（38-190 nm） than those produced by NaOH treatment（531-825 nm）.Finally,we demonstrated positive effects of silica NPs produced from laser ablation on the growth of microalgae,and thus,our novel method may be beneficial as an environmentally friendly procedure to produce NPs.

关键词： Laser ablation One-step synthesis Raman Silica nanoparticle Microalgae

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Anticorrosive Properties of Green Silver Nanoparticles to Prevent Microbiologically Influenced Corrosion on Copper in the Marine Environment

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Journal of Marine Science and Application 2021年第1期20卷 10-20页

作者： nalan oya san Keskin Esra Yaylaci Selen Guclu Durgun Furkan Deniz Hasan Nazır PolatlıScience and Literature Faculty Biology DepartmentNanosan LaboratoryAnkara HacıBayram Veli University06900 AnkaraTurkey Faculty of Medicine Department of Medical Biology and GeneticsGazi University06560 AnkaraTurkey Department of Medical Biology Lokman Hekim University06510 AnkaraTurkey Faculty of Science Department of ChemistryAnkara University06100 AnkaraTurkey

Microbiologically influenced corrosion is a global problem especially materials used in marine *** that respect,inhibitors are widely used to control fouling and corrosion in marine *** techniques used in inhibitor production are expensive and considered hazardous to the ***,scientists are motivated to explore natsural and green products as potent corrosion inhibitors especially in nano *** this study,antibacterial and anticorrosive properties of green silver nanoparticles(AgNPs)were studied through weight loss,electrochemical characterization,and surface analysis *** corrosion of copper(Cu)in artificial seawater(ASW),Halomonas variabilis(***)NOSK,and ***+AgNPs was monitored using electrochemical measurements like open circuit potential(OCP),electrochemical impedance spectroscopy(EIS),and potentiodynamic polarization *** showed excellent antibacterial activity against pathogenic *** studies demonstrate a noticeable decrease in OCP and current density in ASW containing ***+AgNPs compared to both ASW and ASW inoculated with bacterium,which confirmed the decrease of corrosion rate of ***,the obtained voltammograms show that the silver nanoparticles were adsorbed on the copper electrode surface from the corrosion ***,the results prove that the novel idea of green silver nanoparticles acts as an anticorrosive film in the marine environment.

关键词： Antimicrobial Copper Electrochemical impedance spectroscopy Transmission electron microscopy Microbiologically influenced corrosion Nanoparticle

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