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RISS 인기검색어
- 검색키워드
- 저자 : Jiejing Zhou (검색결과 3 건)
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Preparation and Characterization of Antioxidant Peptides from Fermented Goat Placenta
Hou, Yinchen,Zhou, Jiejing,Liu, Wangwang,Cheng, Yongxia,Wu, Li,Yang, Gongming Korean Society for Food Science of Animal Resource 2014 한국축산식품학회지 Vol.34 No.6
The goat placenta was fermented by Bacillus subtilis and the optimal fermentation parameters of strongest antioxidant capacity of peptides were obtained using response surface methodology (RSM). The effects of fermentation time, initial pH value and glucose content on the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging capacity of the goat peptides were well fitted to a quadric equation with high determination coefficients. According to the data analysis of design expert, the strongest DPPH radical scavenging capacity value was obtained with the following conditions: content of glucose was 2.23%, initial pH value was 7.00 and fermentation time was 32.15 h. The DPPH radical scavenging capacity commonly referring antioxidant activity showed a concentration dependency and increased with increasing peptide concentration. The effects of temperature and pH were assessed to determine the stability of antioxidant peptides prepared from goat placenta. Antioxidant peptides showed good stabilities when temperature was lower than $70^{\circ}C$. However, the antioxidant peptides lost antioxidant activities rapidly under alkaline and excessive acid condition. Ultrafiltration technique was performed to separate fermentation broth with different Mw (molecular weight). It was found that peptides in the range of < 3 KDa mainly accounted for the antioxidant activities.
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Preparation and Characterization of Antioxidant Peptides from Fermented Goat Placenta
Yinchen Hou,Jiejing Zhou,Wangwang Liu,Yongxia Cheng,Li Wu,Gong Ming Yang 한국축산식품학회 2014 한국축산식품학회지 Vol.34 No.6
The goat placenta was fermented by Bacillus subtilis and the optimal fermentation parameters of strongest antioxidantcapacity of peptides were obtained using response surface methodology (RSM). The effects of fermentation time, initial pHvalue and glucose content on the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging capacity of the goat peptideswere well fitted to a quadric equation with high determination coefficients. According to the data analysis of design expert,the strongest DPPH radical scavenging capacity value was obtained with the following conditions: content of glucose was2.23%, initial pH value was 7.00 and fermentation time was 32.15 h. The DPPH radical scavenging capacity commonlyreferring antioxidant activity showed a concentration dependency and increased with increasing peptide concentration. Theeffects of temperature and pH were assessed to determine the stability of antioxidant peptides prepared from goat placenta. Antioxidant peptides showed good stabilities when temperature was lower than 70oC. However, the antioxidant peptides lostantioxidant activities rapidly under alkaline and excessive acid condition. Ultrafiltration technique was performed to sepa-rate fermentation broth with different Mw (molecular weight). It was found that peptides in the range of < 3 KDa mainlyaccounted for the antioxidant activities.
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Mina Hasman,Jiejing Zhou,Alice Guarisco,Nicholas Chan,Alessandro Beghini,Zhaofan Li,Michael Cascio,Yasemin Kologlu Council on Tall Building and Urban Habitat Korea 2023 International journal of high-rise buildings Vol.12 No.2
Cities cover only 3% of the planet's surface, yet they are responsible for more than 75% of the global emissions. Given the projected urban built area will double by 2060, the carbon emitted from cities will further increase. SOM proposes the Urban Sequoia concept, for buildings that go beyond 'net zero' and absorb carbon from the atmosphere. This concept combines multiple strategies, including the use of an optimised building form with a highly efficient structural system, modularized prefabrication techniques, holistic integration of facade, MEP and interiors' components, bio-based materials, and Direct Air Capture (DAC) technology, to reduce a 40-storey building's whole life cycle carbon emissions by more than 300% over a 100-year lifespan. Calculations of embodied carbon emissions are performed with SOM's in-house Environmental Analysis (EA) Tool to demonstrate the effectiveness of employing Urban Sequoia's design strategies in the design of new buildings using current technologies.
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