Synthesis and characterization of ampelopsin glucosides using dextransucrase from Leuconostoc mesenteroides B-1299CB4: Glucosylation enhancing physicochemical properties

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Vol 51 (6-7) ◽  
pp. 311-318 ◽  
Author(s):  
Hye-Jin Woo ◽  
Hee-Kyoung Kang ◽  
Thi Thanh Hanh Nguyen ◽  
Go-Eun Kim ◽  
Young-Min Kim ◽  
...  
2017 ◽  
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pp. 2527-2535 ◽  
Author(s):  
Maryam Yousefi ◽  
Majid Abdouss ◽  
Ali Akbar Miran Beigi ◽  
Ali Naseri

2016 ◽  
Vol 82 (1) ◽  
pp. 588-596 ◽  
Author(s):  
Wenbo Liu ◽  
Jiangping Nie ◽  
Xiaoli Tan ◽  
Huiqiang Liu ◽  
Nannan Yu ◽  
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Vol 304 ◽  
pp. 112718 ◽  
Author(s):  
Duo Zhang ◽  
Biao Li ◽  
Mei Hong ◽  
Yu-Xia Kong ◽  
Jing Tong ◽  
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2009 ◽  
Vol 83 (6) ◽  
pp. 1009-1016 ◽  
Author(s):  
Jin Kang ◽  
Young-Min Kim ◽  
Nahyun Kim ◽  
Du-Woon Kim ◽  
Seung-Hee Nam ◽  
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2007 ◽  
Vol 40 (5) ◽  
pp. 1124-1129 ◽  
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Jin-Ha Lee ◽  
Deok-Young Jhon ◽  
Woo-Jin Jun ◽  
Seong-Soo Kang ◽  
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2012 ◽  
Vol 16 ◽  
pp. 9-14 ◽  
Author(s):  
Sardar Ali ◽  
Noor Asmawati Mohd Zabidi ◽  
Duvvuri Subbarao

Cobalt and iron are common catalysts used in the Fischer-Tropsch (FT) reaction. This paper presents the synthesis and characterization of monometallic and bimetallic cobalt and iron nanoparticles supported on carbon nanotubes (CNTs). The CNTs-supported nanocatalysts were synthesized by a wet impregnation method at various ratios of Fe:Co. The physicochemical properties of the samples were analyzed by H2-temperature programmed reduction (TPR), CO and H2-chemisorption analyses, transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. The effects of incorporation of Fe into Co on the physicochemical properties of Co/CNTs in terms of degree of reduction, CO and H2 chemisorptions and morphologies were investigated. TEM showed that metal nanoparticles were well dispersed on the external surface and inside the CNTs. For monometallic Co/CNTs and Fe/CNTs, the average metal particle size was 5±1 nm and 6±1 nm, respectively. For the bimetallic 70Co30Fe/CNTs nanocatalysts, the average particle size was found to be 4±1 nm. Metal particles attached to the outer walls were bigger than the ones inside the CNTs. H2-TPR analysis of Co/CNTs indicated two temperature regions at 330°C (low temperature) and 491°C (high temperature). The incorporation of iron into cobalt nanocatalysts of up to 30 % of the total metal loading enhanced the catalyst’s H2 and CO chemisorptions capacities and reducibility.


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