http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Fugang (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
Production of Xylooligosaccharides from Corncobs Using Ultrasound-assisted Enzymatic Hydrolysis
Juntao Sun,Zhichao Zhang,Fugang Xiao,Ximei Jin 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.6
Xylooligosaccharides were obtained using ultrasound-assisted enzymatic hydrolysis from xylan that was alkali extracted from corncobs. Effects of alkali treatments on xylan extraction were investigated. The influence of operational conditions in ultrasound-assisted enzymatic hydrolysis on xylooligosaccharide production was also studied. Optimal conditions for xylan extraction were determined to be an alkaline concentration of 15%, a corncobs to alkaline solution ratio of 1:20, a reaction temperature of 100°C, and a reaction time of 2 h. Optimal conditions for xylanase-catalyzed hydrolysis of xylan to xylooligosaccharides were determined to be an enzyme concentration of 4 g/L, an ultrasound power of 200 W, a reaction temperature of 50°C and a reaction time of 10 min. Using a combination of ultrasound and enzyme increased the reducing sugar content by approximately 50%, compared with using of enzymes alone. Ultrasound and enzymes exert a synergistic effect.
-
Friction and Wear of Self-mated SiC and Si3N4 in Green Water-based Lubricant
Shuai Yan,Bin Lin,Feng Liu,Fugang Yan 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.
Hydrostatic/hybrid bearings have been used in many engineering applications. In order to address the disadvantages of lubricating oil such as pollution and resource consumption, researchers are trying to use water to replace oil in these bearings. To eliminate the corrosivity of water and increase its viscosity, additives were added in water and this new lubricant is called “green water-based lubricant”. Ceramics are considered to be very suitable tribo-pair materials in water. In order to select the best material in the green water-based lubricant and explore the effect of the additives, this paper carried out friction and wear experiments of self-mated SiC and self-mated Si3N4 in this new lubricant on a ring-toring tribometer. The results show that self-mated SiC possesses better running-in property, higher load-carrying capacity,lower friction coefficient, lower wear rate and smoother surface topography. The results show that the self-mated SiC and green water-based lubricant is a promising combination to replace the metal/oil system in hydrostatic/hybrid bearings.
-
Wei, Guangfei,Yang, Feng,Wei, Fugang,Zhang, Lianjuan,Gao, Ying,Qian, Jun,Chen, Zhongjian,Jia, Zhengwei,Wang, Yong,Su, He,Dong, Linlin,Xu, Jiang,Chen, Shilin The Korean Society of Ginseng 2020 Journal of Ginseng Research Vol.44 No.6
Background: Panax quinquefolius and Panax notoginseng are widely used and well known for their pharmacological effects. As main pharmacological components, saponins have different distribution patterns in the root tissues of Panax plants. Methods: In this study, the representative ginsenosides were detected and quantified by desorption electrospray ionization mass spectrometry and high-performance liquid chromatography analysis to demonstrate saponin distribution in the root tissues of P. quinquefolius and P. notoginseng, and saponin metabolite profiles were analyzed by metabolomes to obtain the biomarkers of different root tissues. Finally, the transcriptome analysis was performed to demonstrate the molecular mechanisms of saponin distribution by gene profiles. Results: There was saponin distribution in the root tissues differed between P. quinquefolius and P. notoginseng. Eight-eight and 24 potential biomarkers were detected by metabolome analysis, and a total of 340 and 122 transcripts involved in saponin synthesis that were positively correlated with the saponin contents (R > 0.6, P < 0.05) in the root tissues of P. quinquefolius and P. notoginseng, respectively. Among them, GDPS1, CYP51, CYP64, and UGT11 were significantly correlated with the contents of Rg1, Re, Rc, Rb2, and Rd in P. quinquefolius. UGT255 was markedly related to the content of R1; CYP74, CYP89, CYP100, CYP103, CYP109, and UGT190 were markedly correlated with the Rd content in P. notoginseng.
-
Bo Jiang,Xuewen Hu,Leyu Zhou,Haibo Wang,Yazheng Liu,Fugang Gou 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.2
The ferrite–bainite microstructures and mechanical properties in a hot-rolled dual phase steel with different transformationtemperatures were investigated in this paper. The deformation behavior of bainite and ferrite was analyzed by using in situscanning electron microscope. The results showed that the ferrite and bainite can be refined and the volume fraction of bainitecan be slightly increased by 5% by decreasing the ferrite transformation temperature from 690 to 635 °C and increasing thebainite transformation temperature from 400 to 450 °C. The strengthening mechanism was dislocation difference in polygonaland acicular ferrite and then the grain size difference of ferrite. The hole expansion ratio increased from 52.9 to 83.7% withthe ferrite transformation temperature decreasing. The cracks or voids were smaller in size and also the number in steel withthe lower ferrite transformation temperature after expanding. The microstructure separation along the boundary betweenbainite and ferrite and the slip band in the ferrite appeared at the non-uniform deformation stage. However, fewer appearedin the microstructure of steel with lower ferrite transformation temperature. Cooperative deformation of ferrite and bainiteand finer microstructure in steel with lower ferrite transformation temperature were the mechanisms why the cracks couldnot easily nucleated and propagated, respectively. Thus this was also why there was a better hole expansion ratio.
-
Yutian Fan,Liwei Lu,Tao Zhou,Hua Zhang,Fugang Qi,Min Ma,Zhiqiang Wu,Weitao Jia,Sha Zhang,Weiying Huang 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.10
In this work, a novel process of repeated upsetting-extrusion (RUE) was used to fabricate the AQ80 magnesium (Mg) alloy. The effects of deformation passes on the microstructure and microhardness of the RUEed AQ80 Mg alloy were studied. The results showed that {10–12} extension twins appeared in the sample after 1 pass of deformation compared to the initial sample, which divided the coarse grains and achieved the preliminary refinement of the grains. The grains were uniformly refined further with increasing RUE deformation passes, and after 3 passes, the average grain size was reduced from 27.4 to 3.0 μm. The grains were refined mainly by continuous dynamic recrystallization (CDRX), particle-stimulated nucleation (PSN), and discontinuous dynamic recrystallization (DDRX) mechanisms. After RUE deformation, the peak component of the texture was tilted by 0–20° toward the extrusion direction (ED) because of the increased activation of pyramidal < c + a > slip. The microhardness of the 3-pass RUE deformed sample increased by 12.9% compared to the initial sample. This is mainly attributable to fine-grained strengthening and second phase strengthening.
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
