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Md. Abul Hasnat,Mehnaz Pervin,박사라,장용창,임지홍,김영준,김영옥,권혁중,임병우 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.2
The anti-inflammatory effects of oat extracts in vitro and in vivo were determined based on antioxidant functions. To examine the effect of oat extracts in murine macrophage RAW 264.7 cells, MTT assays were used and nitric oxide (NO) production was analyzed based on absorbance and inducible nitric oxide synthase (iNOS) expression levels using Western blot analysis. Immunoglobulin expression levels were determined using an enzyme-linked immunosorbent assay (ELISA). Oat extracts showed significant (p<0.05) antioxidant properties and restored the cell viability of LPS-stimulated RAW 264.7 cells, compared with controls. NO production and iNOS protein levels were also reduced by oat extracts. DSS (3%)-administered mice manifested symptoms similar to human colitis patients, and oat extracts attenuated the symptoms of colitis. Preventive and therapeutic administration of oat extracts used as antioxidants can ameliorate inflammatory conditions in cells and DSS-induced colitis in mice.
Md. Abul Hasnat,Mehnaz Pervin,김다혜,김영준,이정준,표한종,이충우,임병우 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.2
Antioxidant and anti-inflammatory activities of water extract and fermented hydrolysate of abalone (Haliotis discus hannai Ino) were examined. Experimental models were used to characterize the antioxidant activities, which were compared with the standard antioxidants α- tocoferol and EDTA (ethylenediamine tetraacetic acid). Antioxidant activities of water extract and fermented hydrolysate were examined at the cellular level and evaluated for anti-inflammatory activities in LPS (lipopolysaccharides)- stimulated murine RAW 264.7 macrophages. Production of the pro-inflammatory mediators nitric oxide (NO) and prostaglandin (PGE2) was significantly (p<0.05) inhibited by treatments with abalone water extract and fermented hydrolysate, compared with controls. Abalone (Haliotis discus hannai Ino) can be considered as a potential source of natural antioxidants and dietary supplements.
Md Sufi Ullah Siddik Bhuyan,Eun Hei Lee,Abul Hasnat MD Ashraful Alam,Soa Choi,Ruri Lee,Kwanghyeon Song,Yong Chan Seo 한국폐기물자원순환학회 2015 한국폐기물자원순환학회 학술대회 Vol.2015 No.11
Subcritical hydrolysis followed by methyl estrification was used to produce bio-diesel from low valued waste cooking oil at mild reaction conditions in this study. More than 90% fatty acid methyl esther (FAME) conversion was achieved by subcritical hydrolysis without using catalysts at 275℃ for 45 minutes. The highest conversion to linoleic acid (C18:2) was obtained at this condition. The higher content of free fatty acid (FFA) in waste cooking oil resulted in higher conversion to FAME. It was also observed more prominent at high temperature due to auto catalytic behavior of FFA. FAME yield found about 92% without using catalyst; whereas 98% yield was obtained using 80% TiO2 loading S-TiO2/MCM-41 catalyst at 220℃ and 20 minutes. The amount of FAME increased may be due to trans-esterification of un-reacted TG, DG, and MG with methanol remained during the hydrolysis stage. The higher FAME conversion means the better quality bio-diesel.
( Md Sufi Ullah Siddik Bhuyan ),( Eun Hei Lee ),( Abul Hasnat Md Ashraful Alam ),( Soa Choi ),( Ruri Lee ),( Kwanghyeon Song ),( Yong Chan Seo ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 심포지움 Vol.2015 No.2
Subcritical hydrolysis followed by methyl estrification was used to produce bio-diesel from low valued waste cooking oil at mild reaction conditions in this study. More than 90% fatty acid methyl esther (FAME) conversion was achieved by subcritical hydrolysis without using catalysts at 275℃ for 45 minutes. The highest conversion to linoleic acid (C18:2) was obtained at this condition. The higher content of free fatty acid (FFA) in waste cooking oil resulted in higher conversion to FAME. It was also observed more prominent at high temperature due to auto catalytic behavior of FFA. FAME yield found about 92% without using catalyst; whereas 98% yield was obtained using 80% TiO2 loading S-TiO<sub>2</sub>/MCM-41 catalyst at 220℃ and 20 minutes. The amount of FAME increased may be due to trans-esterification of un-reacted TG, DG, and MG with methanol remained during the hydrolysis stage. The higher FAME conversion means the better quality bio-diesel.
( Md Sufi Ullah Siddik Bhuyan ),( Eun Hei Lee ),( Abul Hasnat Md Ashraful Alam ),( Soa Choi ),( Ruri Lee ),( Kwanghyeon Song ),( Yong Chan Seo ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 추계학술발표논문집 Vol.2015 No.-
Subcritical hydrolysis followed by methyl estrification was used to produce bio-diesel from low valued waste cooking oil at mild reaction conditions in this study. More than 90% fatty acid methyl esther (FAME) conversion was achieved by subcritical hydrolysis without using catalysts at 275℃ for 45 minutes. The highest conversion to linoleic acid (C18:2) was obtained at this condition. The higher content of free fatty acid (FFA) in waste cooking oil resulted in higher conversion to FAME. It was also observed more prominent at high temperature due to auto catalytic behavior of FFA. FAME yield found about 92% without using catalyst; whereas 98% yield was obtained using 80% TiO<sub>2</sub> loading S-TiO<sub>2</sub>/MCM-41 catalyst at 220℃ and 20 minutes. The amount of FAME increased may be due to trans-esterification of un-reacted TG, DG, and MG with methanol remained during the hydrolysis stage. The higher FAME conversion means the better quality bio-diesel.