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Antioxidant compounds and activities of burdock and lotus root with heat treatment
Jang Keun Son,Yoon Jo Jeong,Tae Yong You,Tae Hwan Shin,Yeon Jae Jo,Heon Sang Jeong 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study was conducted to evaluate the antioxidant compounds and activities of burdock and lotus root extracts with heat treatment temperatures (raw, 150 and 200℃). Total polyphenol and flavonoid contents, and ABTS and DPPH free radical scavenging activities increased with increasing heating temperature. The highest total polyphenol content was 83.27 mg gallic acid equivalent (GAE)/g (dried sample) in burdock root and 38.06 mg GAE/g in lotus root at 200℃ heating temperature. The highest total flavonoid content was 7.26 mg catechin equivalent (CE)/g in burdock root and 1.45 mg CE/g in lotus root at 200℃ heating temperature. The highest ABTS and DPPH free radical scavenging activities were 8.29 mg ascorbic acid (AAE)/g and 9.60 mg AAE/g in burdock root and 5.07 mg AAE/g and 8.58 mg AAE/g in lotus root at 200℃ heating temperature, respectively. These results suggest that heat treatment of burdock and lotus root can be considered one of the food processing methods that increase antioxidant compounds and activities.
Jang, Jihoon,Kim, Jung-Keun,Choi, Jin-Woo,Hwang, Taek-Sung,Jo, Mijung,Kim, Inhye,Cho, Byoung-Ki,Lee, Eunji The Royal Society of Chemistry 2013 Chemical communications Vol.49 No.73
<P>The amphiphilic block codendrimer self-assembled into supramolecular vesicles with a bilayer membrane in both hydrophilic and hydrophobic solvents. Surface-modified quantum dots (QDs) were successfully entrapped within the wall of vesicles through a simple self-assembly process without any structural disruption.</P> <P>Graphic Abstract</P><P>A Janus amphiphilic codendrimer can lead to the formation of organic–inorganic hybrid hollow capsules by co-assembly with surface-modified quantum dots in both hydrophilic and hydrophobic solvents. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cc42213e'> </P>
Chlorogenic Acid and Coffee Prevent Hypoxia-Induced Retinal Degeneration
Jang, Holim,Ahn, Hong Ryul,Jo, Hyoung,Kim, Kyung-A,Lee, Eun Ha,Lee, Ki Won,Jung, Sang Hoon,Lee, Chang Y. American Chemical Society 2014 Journal of agricultural and food chemistry Vol.62 No.1
<P>This study explored whether chlorogenic acid (CGA) and coffee have protective effects against retinal degeneration. Under hypoxic conditions, the viability of transformed retinal ganglion (RGC-5) cells was significantly reduced by treatment with the nitric oxide (NO) donor <I>S</I>-nitroso-<I>N</I>-acetylpenicillamine (SNAP). However, pretreatment with CGA attenuated cell death in a concentration-dependent manner. In addition, CGA prevented the up-regulation of apoptotic proteins such as Bad and cleaved caspase-3. Similar beneficial effects of both CGA and coffee extracts were observed in mice that had undergone an optic nerve crush (ONC) procedure. CGA and coffee extract reduced cell death by preventing the down-regulation of Thy-1. Our <I>in vitro</I> and <I>in vivo</I> studies demonstrated that coffee and its major component, CGA, significantly reduce apoptosis of retinal cells induced by hypoxia and NO, and that coffee consumption may help in preventing retinal degeneration.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jafcau/2014/jafcau.2014.62.issue-1/jf404285v/production/images/medium/jf-2013-04285v_0008.gif'></P>
Jang, Inae,Jeon, Aeran,Lim, Suk Gyu,Hong, Duk Ki,Kim, Min Soo,Jo, Jae Hyeong,Lee, Sang Tak,Moon, Bongjin,Oh, Han Bin Springer New York LLC 2019 Journal of the American Society for Mass Spectrome Vol.30 No.3
<P>Free radical-initiated peptide sequencing mass spectrometry (FRIPS MS) was employed to analyze a number of representative singly or doubly protonated phosphopeptides (phosphoserine and phosphotyrosine peptides) in positive ion mode. In contrast to collision-activated dissociation (CAD) results, a loss of a phosphate group occurred to a limited degree for both phosphoserine and phosphotyrosine peptides, and thus, localization of a phosphorylated site was readily achieved. Considering that FRIPS MS supplies a substantial amount of collisional energy to peptides, this result was quite unexpected because a labile phosphate group was conserved. Analysis of the resulting peptide fragments revealed the extensive production of <I>a</I>-, <I>c</I>-, <I>x</I>-, and <I>z</I>-type fragments (with some minor <I>b</I>- and <I>y</I>-type fragments), suggesting that radical-driven peptide fragmentation was the primary mechanism involved in the FRIPS MS of phosphopeptides. Results of this study clearly indicate that FRIPS MS is a promising tool for the characterization of post-translational modifications such as phosphorylation.</P> [FIG OMISSION]</BR>
a-Si TFT Integrated Gate Driver Using Multi-thread Driving
Jang, Yong-Ho,Yoon, Soo-Young,Park, Kwon-Shik,Kim, Hae-Yeol,Kim, Binn,Chun, Min-Doo,Cho, Hyung-Nyuck,Choi, Seung-Chan,Moon, Tae-Woong,Ryoo, Chang-Il,Cho, Nam-Wook,Jo, Sung-Hak,Kim, Chang-Dong,Chung, I The Korean Infomation Display Society 2006 Journal of information display Vol.7 No.3
A novel a-Si TFT integrated gate driver circuit using multi-thread driving has been developed. The circuit consists of two independent shift registers alternating between the two modes, "wake" and "sleep". The degradation of the circuit is retarded because the bias stress is removed during the sleep mode. It has been successfully integrated in 14.1-in. XGA LCD Panel, showing enhanced stability.