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- 저자 : Dalan, A. Burak (검색결과 2 건)
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Self-supported ZIF-coated Co2P/V3P bifunctional electrocatalyst for high-efficiency water splitting
Yuying Yang,Jingyue Yang,Qin Zhou,Dalan Qian,Yaling Xiong,Zhongai Hu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
Exploring high-efficiency dual-functional electrocatalysts to drive electrochemical water splitting is ofgreat importance for advancement of renewable hydrogen energy. Herein, a hierarchical core–shell structureelectrocatalyst ZIF-Co2P/V3P is in situ grown on Ni foam (abbreviated as ZIF-Co2P/V3P@NF) by a stepwisemethod. Firstly, Co, V layered double hydroxides (CoV-LDHs) is grown directly on Ni foam (NF)substrate by solvothermal method. Secondly, CoV-LDHs@NF is transferred into 2-MeIm solution andits surface is coated with a layer of imidazolate zeolite skeleton (ZIF). Finally, ZIF-Co2P/V3P@NF catalystis obtained by low-temperature phosphorization method. The performance of hydrogen evolution reaction(HER) and oxygen evolution reaction (OER) can be adjusted by tuning molar ratio of Co/V, and theoptimized ZIF-Co2P/V3P@NF-2 manifests superior performance due to its core–shell structure coveredby ZIF skeleton, rich heterogeneous interfaces, as well as the positive synergistic interaction betweenthe Co2P and V3P. The overpotentials are only 57 mV@10 mA cm2 for HER and 261 mV@10 mA cm2for OER. Remarkably, the alkaline electrolyzer assembled with ZIF-Co2P/V3P@NF-2 catalyst acquires asmall operating voltage of 1.54 V to drive the current density of 10 mA cm2 and displays excellentlong-term durability. This work provides a novel opinion for design and preparation of non-noble metalelectrocatalysts.
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Gultekin, Guldal Inal,Yilmaz, Seda Gulec,Kahraman, Ozlem Timirci,Atasoy, Hande,Dalan, A. Burak,Attar, Rukset,Buyukoren, Ahmet,Ucunoglu, Nazli,Isbir, Turgay Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.3
Uterine leiomyomas (ULM), are benign tumors of the smooth muscle cells of the myometrium. They represent a common health problem and are estimated to be present in 30-70% of clinically reproductive women. Abnormal angiogenesis and vascular-related growth factors have been suggested to be associated with ULM growth. The angiotensin-I converting enzyme (ACE) is related with several tumors. The aim of this study was to identify possible correlation between ULM and the ACE I/D polymorphism, to evaluate whether the ACE I/D polymorphism could be a marker for early diagnosis and prognosis. ACE I/D was amplified with specific primer sets recognizing genomic DNA from ULM (n=72) and control (n=83) volunteers and amplicons were separated on agarose gels. The observed genotype frequencies were in agreement with Hardy-Weinberg equilibrium ($x^2=2.162$, p=0.339). There was no association between allele frequencies and study groups ($x^2=0.623$; p=0.430 for ACE I allele, $x^2=0.995$; p=0.339 for ACE D allele). In addition, there were no significant differences between ACE I/D polymorphism genotype frequencies and ULM range in size and number ($X^2=1.760;$ p=0.415 for fibroid size, $X^2=0.342;$ p=0.843 for fibroid number). We conclude that the ACE gene I/D polymorphism is not related with the size or number of ULM fibroids in Turkish women. Thus it cannot be regarded as an early diagnostic parameter nor as a risk estimate for ULM predisposition.
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