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음식물 폐기물류로 제조된 퇴비의 고형연료 가치 평가 연구
이경섭,장한별,정은지,도아름,하진욱 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2
In 2019, the daily generation of food waste in Korea was 14,314 tons, which is a steady increase compared to the past. To efficiently use food waste as an effective resource, composting and feeding are carried out. In Korea, attention is gradually focused on a sustainable resource circulation society. Compost made of food waste has problems with foreign substances, heavy metals, and salt content, and solid fuelization research is being actively conducted to compensate for this. In this study, infrared spectroscopy(FT-IR), organic content measurement(TGA), and chemical composition were measured to compare the fuel characteristics with wood pellets, which are major solid fuels, in order to examine the physical and chemical properties of food waste compost.
A New Flavanone Glycoside from the Dried Immature Fruits of Poncirus trifoliata
HAN, Ah-Reum,KIM, Jong-Bin,LEE, Jun,NAM, Joo-Won,LEE, Ik-Soo,SHIM, Chang-Koo,LEE, Kyung-Tae,SEO, Eun-Kyoung 이화여자대학교 약학연구소 2008 藥學硏究論文集 Vol.- No.18
A new flavanone glycoside, (2R)-5-hydroxy-4'-methoxyflavanone-7-0-{β-glucopyranosyl-(1->2)-β-glucopyranoside} (1), was isolated from the EtOAc extract of dried immature fruit of Poncirus trifoliata, together with three known compounds, (2S)-poncirin (2), (2S)-naringin (3), and (2S)-poncirenin (4). The structure of compound 1 was elucidated by spectroscopic data analysis, including 1D and 2D NMR experiments. Among the isolates, compound 2 exhibited considerable inhibitory activity against lipopolysaccharide (LPS)-induced prostaglandin E₂ (PGE₂) and interleukin-6 (IL-6) production, and mRNA expression in RAW 264.7 murine macrophage cells.
A New Flavanone Glycoside from the Dried Immature Fruits of <i>Poncirus trifoliata</i>
Han, Ah-Reum,Kim, Jong-Bin,Lee, Jun,Nam, Joo-Won,Lee, Ik-Soo,Shim, Chang-Koo,Lee, Kyung-Tae,Seo, Eun-Kyoung Pharmaceutical Society of Japan 2007 Chemical & pharmaceutical bulletin Vol.55 No.8
<P>A new flavanone glycoside, (2<I>R</I>)-5-hydroxy-4′-methoxyflavanone-7-<I>O</I>-{β-glucopyranosyl-(1→2)-β-glucopyranoside} (1), was isolated from the EtOAc extract of dried immature fruit of <I>Poncirus trifoliata</I>, together with three known compounds, (2<I>S</I>)-poncirin (2), (2<I>S</I>)-naringin (3), and (2<I>S</I>)-poncirenin (4). The structure of compound 1 was elucidated by spectroscopic data analysis, including 1D and 2D NMR experiments. Among the isolates, compound 2 exhibited considerable inhibitory activity against lipopolysaccharide (LPS)-induced prostaglandin E<SUB>2</SUB> (PGE<SUB>2</SUB>) and interleukin-6 (IL-6) production, and mRNA expression in RAW 264.7 murine macrophage cells.</P>
Han, Ah-Reum,Kim, Jongtae,Yang, Il-Hyung The Korean Association Of Orthodontists 2021 대한치과교정학회지 Vol.51 No.1
Objective: The aim of this study was to evaluate the correlation between the vertical position of maxillary first molar and vertical skeletal measurements in lateral cephalograms by using new linear measurements on the vertical axis of coordinates with calibration. Methods: The vertical position of maxillary first molar (U6-SN), and the conventionally used variables (ConV) and the newly derived linear variables (NwLin) for vertical skeletal patterns were measured in the lateral cephalograms of 103 Korean adults with normal occlusions. Pearson correlation analyses and multiple linear regression analyses were performed with and without calibration using the anterior and posterior cranial base (ACB and PCB, respectively) lengths to identify variables related to U6-SN. Results: The PCB-calibrated statistics showed the best power of explanation. ConV indicating skeletal hyperdivergency was significantly correlated with U6-SN. Six NwLin regarding the position of palatal plane were positively correlated with U6-SN. Each multiple linear regression analysis generated a two-variable model: sella and nasion to palatal plane. Among the three models, the PCB-calibrated model yielded highest adjusted R2 value, 0.880. Conclusions: U6-SN could be determined by the vertical position of the maxilla, which could then be used to plan the amount of molar intrusion and estimate its clinical stability. Cephalometric calibration on the vertical axis of coordinates by using PCB for vertical linear measurements could strengthen the analysis itself.
Han, Ah-reum,Kim, Moon-Jung,Kwak, Geun-Hee,Son, Jonghyeon,Hwang, Kwang Yeon,Kim, Hwa-Young American Chemical Society 2016 Biochemistry Vol.55 No.36
<P>Many bacteria, particularly pathogens, possess methionine sulfoxide reductase A (MsrA) and B (MsrB) as a fusion form (MsrAB). However, it is not clear why they possess a fusion MsrAB form rather than the separate,enzymes that exist in most organisms. In this study, we performed biochemical and kinetic analyses of MsrAB from Treponema denticola (TdMsrAB), single-domain forms (TdMsrA and TdMsrB), and catalytic Cys mutants (TdMsrAB(C11S) and TdMsrAB(C285S)) We found that the catalytic efficiency of both MsrA and MsrB increased after fusion of the domains and that the linker region (iloop) that connects TdMsrA and TdMsrB is required for the higher catalytic efficiency of TdMsrAB. We also determined the crystal structure of TdMsrAB at 2.3 angstrom, showing that the iloop mainly interacts with TdMsrB via hydrogen bonds. Further kinetic analysis using the iloop mutants revealed that the iloop-TdMsrB interactions are critical to MsrB and MsrA activities. We also report the structure in which an oxidized form of dithiothreitol, an in vitro reductant for MsrA and MsrB, is present in the active site of TdMsrA. Collectively, the results of this study reveal an essential role of the iloop in maintaining the higher catalytic efficiency of the MsrAB fusion enzyme and provide a better understanding of why the MsrAB enzyme exists as a fused form.</P>
Han, Ah-Reum,Paik, Young-Sook The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.6
Two new acetophenone glncosides, 2,6-dihydroxy-4-methoxyacetophenone 3-C-${\beta}$-D-glucoside (1) and 2,6-dihydroxy-4-methoxyacetophenone 3-C-${\beta}$-D-(6'-O-ganoyl)glucoside (2), together with three known compounds, eugenin (3), 8-C-glucosylnoreugenin (4), and gallic acid (5) were isolated from the EtOAc soluble fraction of the MeOH extract of clove buds (Syzygium aromaticum). Of these, compound 2 showed significant prolyl endopeptidase inhibitory activity with $IC_{50}$ value of $17.2{\pm}1.1\;{\mu}M$, suggesting it may have potential use against memory impairment and cognitive decline.
Cytotoxic Constituents of the Octocoral Dendronephthya gigantea
Han Ah Reum,Song Jun Im,Jang Dae Sik,Min Hye Young,Lee Sang Kook,Seo Eun Kyoung The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.3
A known monoalkyl glycerol ether, ($\pm$)-1-nonadecyloxy-2,3-propanediol (1) was isolated from the ethyl acetate extract of a soft coral Dendronephthya gigantea as a weakly cytotoxic constituent against four human cancer cell lines, A549, HT-29, HT-1080, and SNU-638. In addition, a known ceramide, (28,3R,4E,8E)-N-hexadecanoyl-2-amino-4,8-octadecadiene-1 ,3-diol (2), was also isolated as an inactive constituent. This is the first report on the isolation of the compounds 1 and 2 from the octocoral, Dendronephthya species.
Han, Ah-Reum,Kim, Hyo Young,So, Yangkang,Nam, Bomi,Lee, Ik-Soo,Nam, Joo-Won,Jo, Yeong Deuk,Kim, Sang Hoon,Kim, Jin-Baek,Kang, Si-Yong,Jin, Chang Hyun Hindawi 2017 International journal of analytical chemistry Vol.2017 No.-
<P>The flowers of<I> Chrysanthemum morifolium</I> Ramat. have been used as an herbal tea and in traditional medicine, and the plant has been developed to produce horticultural cultivars of various colors and shapes. In this study, a new chrysanthemum cultivar with dark purple petals (<I>C. morifolium</I> cv. ARTI-Dark Chocolate; ADC) was developed by radiation-induced mutation breeding of its original cultivar with purple striped white petals (<I>C. morifolium</I> cv. Noble Wine, NW). The phenolic profile and antioxidant property of ADC were investigated and compared with NW and the commercially available medicinal herb,<I> C. morifolium</I> with yellow petals (CM), in order to find a scientific support to produce a new source of natural antioxidant. Flavonoid and phenolic acid profiles of the ethanol extracts of the three flowers were analyzed by high-performance liquid chromatography-diode array detector-electrospray ionization mass spectrometry (HPLC-DAD-ESIMS), while antioxidant properties were evaluated using the 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging assay. Among the tested flowers, ADC possessed the strongest antioxidant capacity and the highest phenolic contents. Flavonoids (acacetin, apigenin, luteolin, acacetin-7-<I>O</I>-<I>β</I>-glucoside, apigenin-7-<I>O</I>-<I>β</I>-glucoside, luteolin-7-<I>O</I>-<I>β</I>-glucoside, and linarin) and phenolic acids (chlorogenic acid and mixture of 1,4-, 1,5-, and 3,5-dicaffeoylquinic acids) were identified and quantified.</P>
Identification of a New Fatty Acid from the Seeds of Coix lachryma-jobi var. ma-yuen
Han, Ah-Reum,Kil, Yun-Seo,Kang, Unwoo,Youn, I-Soo,Choi, Goeun,Lee, Yoo Jin,Nam, Joo-Won,Lee, Je-Hyun,Hong, Jongki,Lee, Sang Kook,Seo, Eun-Kyoung Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.4