Hang Sun  Duygu Kocaefe  Dipankar Bhattacharyay  Yasar Kocaefe  Jules Ct  Patrick Coulombe 《化学工程与技术》2019,42(5):1011-1017

Prebaked carbon anodes are used in the electrolytic production of aluminum. They are made of petroleum coke, butts, recycled anodes, and coal tar pitch. The anode quality, which depends on the raw material quality and the production conditions, has an important impact on the cell performance. Metallic impurities (V, Ni, and Fe) found in cokes and anodes increase the carbon consumption by catalyzing the air and CO₂ reactivities. In turn, this increases the production cost, energy consumption, and the emission of greenhouse gases. The current methods for detecting the metallic impurities in carbon are time consuming and require intensive sample preparation, skilled personnel, and costly reagents. In this work, simple, rapid, and effective tools were developed using colorimetric methods.  相似文献   

    

Sana Ayaz  Mushtaq Ahmad  Muhammad Zafar  Muhammad I. Ali  Shazia Sultana  Muhammad Raza Ul Mustafa  Omer Kilic  Duygu N. obanolu  Azize Demirpolat  Abdul Ghani  Rabia Afza  Khalid Ahmad  Mamoona Munir  Nomana Kalsoom  Jamil Raza 《Microscopy research and technique》2020,83(3):239-248

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Effect of chitosan–essential oil,a surface mold inhibitor,on microbiological and physicochemical characteristics of semidried fermented sausages     

Seren Küçükkaya  Betül Arslan  Eda Demirok Soncu  Duygu Ertürk  Ayla Soyer 《Journal of food science》2020,85(4):1240-1247

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Yichen Lu  Xin Liu  Ryoma Hattori  Chi Ren  Xingwang Zhang  Takaki Komiyama  Duygu Kuzum 《Advanced functional materials》2018,28(31)

The last decades have witnessed substantial progress in optical technologies revolutionizing our ability to record and manipulate neural activity in genetically modified animal models. Meanwhile, human studies mostly rely on electrophysiological recordings of cortical potentials, which cannot be inferred from optical recordings, leading to a gap between our understanding of dynamics of microscale populations and brain‐scale neural activity. By enabling concurrent integration of electrical and optical modalities, transparent graphene microelectrodes can close this gap. However, the high impedance of graphene constitutes a big challenge toward the widespread use of this technology. Here, it is experimentally demonstrated that this high impedance of graphene microelectrodes is fundamentally limited by quantum capacitance. This quantum capacitance limit is overcome by creating a parallel conduction path using platinum nanoparticles. A 100 times reduction in graphene electrode impedance is achieved, while maintaining the high optical transparency crucial for deep two‐photon microscopy. Using a transgenic mouse model, simultaneous electrical recording of cortical activity with high fidelity is demonstrated while imaging calcium signals at various cortical depths right beneath the transparent microelectrodes. Multimodal analysis of Ca²⁺ spikes and cortical surface potentials offers unique opportunities to bridge our understanding of cellular dynamics and brain‐scale neural activity.  相似文献   

    

Julie Bureau  Duygu Kocaefe  Yasar Kocaefe  Dipankar Bhattacharyay  Brigitte Morais 《加拿大化工杂志》2018,96(2):545-553

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Julie Bureau  Duygu Kocaefe  Yasar Kocaefe  Dipankar Bhattacharyay 《加拿大化工杂志》2018,96(8):1697-1706

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Duygu Ege  Ali Reza Kamali  Aldo R. Boccaccini 《Advanced Engineering Materials》2017,19(12)

Since its discovery in 2004, derivatives of graphene have been developed and heavily investigated in the field of tissue engineering. Among the most extensively studied forms of graphene, graphene oxide (GO), and GO/polymer‐based nanocomposites have attracted great attention in various forms such as films, 3D porous scaffolds, electrospun mats, hydrogels, and nacre‐like structures. In this review, the most actively investigated GO/polymer nanocomposites are presented and discussed, these nanocomposites are based on chitosan, cellulose, starch, alginate, gellan gum, poly(vinyl alcohol) (PVA), poly(acrylamide), poly(?‐caprolactone) (PCL), poly(lactic acid) (PLLA), poly(lactide‐co‐glycolide) (PLGA), gelatin, collagen, and silk fibroin (SF). The biological and mechanical performance of such nanocomposites are comprehensively scrutinized and ongoing research questions are addressed. The analysis of the literature reveals overall the great potential of GO/polymer nanocomposites in tissue engineering strategies and indicates also a series of challenges requiring further research efforts.

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