Monitoring of heavy metals, bisphenol A and phenol migrated from food packages for delivery

Hyunnho Cho,Ho Cheol Yun,Ji Yoon Lee,Hyeon Jeong Kwon,Eun Jung Jeong,Da Young Kim,Seong Ju Lee,Jung Mi Kang 한국분석과학회 2022 분석과학 Vol.35 No.1

Physicochemical properties and oxidative stability of frying oils during repeated frying of potato chips

Yu, Ki Seon,Cho, Hyunnho,Hwang, Keum Taek 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.3

Physicochemical properties and oxidative stability of refined coconut oil (RCO), refined soybean oil (SBO), pure olive oil (POO), and vegetable shortening (VST) during repeated frying of potato chips were determined. Polyunsaturated fatty acids of all the oils significantly decreased after frying. Tocopherols in SBO, POO and VST, and DPPH radical scavenging activities of POO and VST significantly decreased after frying. $L^*$ values of the oils significantly decreased, and $a^*$ and $b^*$ values significantly increased after 80 times repeated frying. Conjugated dienes and p-anisidine value of SBO after 80 times repeated frying were 21.8 mmol/L and 47.7, respectively, the highest among the oils. Levels of total polar compounds of all the oils after 80 times repeated frying were between 8.1 and 9.5%, not exceeding rejection limit after frying. Compositions and contents of alkanals, 2-alkenals, and 2,4-alkadienals in the oils during frying were largely affected by their fatty acid compositions.

유자(Citrus junos)씨와 유자씨 유지의 메탄올 추출물에 의한 HT-29 대장암 세포 생장 억제 효과 및 유효 성분 분석

김경은(Kyungeun Kim),조현노(Hyunnho Cho),정하나(Hana Jung),이희재(Hee Jae Lee),황금택(Keum Taek Hwang) 한국식품과학회 2017 한국식품과학회지 Vol.49 No.3

본 연구의 목적은 유자씨와 유자씨 유지로부터 HT-29 암세포생장 억제효과를 확인하고 주요 원인 물질을 확인하는 것이다. 유자씨, 헥산 추출 유자씨 유지, 냉압착 유자씨 유지로부터 60% 메탄올을 이용하여 추출물(각각 ES, EHO, ECO)을 얻었다. 추출물의 성분은 HPLC-MS를 이용하여 확인하였다. ES, EHO, ECO를 HT-29 세포에 처리하여 생장 억제 효과를 확인한 결과, EHO와 ECO가 유의적인 효과가 있었다(p<0.05). 반면, ES와 리모닌, 노밀린은 24시간과 48시간 처리 후에 암세포 생장 억제 효과가 없었다(p>0.05). 유자씨 유지 추출물의 암세포 생장 억제효과에 주요 역할을 하는 성분을 탐색하기 위해 제조용 LC로 EHO와 ECO를 분획하여 이 분획물의 암세포 생장 억제 효과와 조성을 확인하였다. 분획물 중에서 EHO의 3개 분획물과 ECO의 2개 분획물이 유의적인 HT-29 세포 생장 억제 효과가 있었다(p<0.05). 이 5개 분획물의 HPLC-MS 분석 결과, 아이소핌피넬린, 버갑텐, 이찬젠신이 주요 성분일 것으로 추정되었다. 아이소핌피넬린, 버갑텐, 이찬젠신을 HT-29 세포에 처리한 결과, 이찬젠신이 유의적인 생장 억제 효과가 있었고(p<0.05), 아이소핌피넬린과 버갑텐은 약간의 생장 억제 효과가 있었으나 유의적이지는 않았다(p>0.05). 따라서 아이소핌피넬린, 버갑텐, 이찬젠신이 유자씨 유지 내의 주요 암세포 생장 억제 물질이며, 이 중에서 이찬젠신이 그 활성이 가장 높은 물질인 것으로 추정한다. The purpose of this study was to investigate the anti-proliferative effect of methanolic extracts from Citrus junos (yuja) seeds and yuja seed oils against HT-29 human colon cancer cells and to identify the key compounds responsible for this effect. Extracts from yuja seeds, yuja seed oil prepared using hexane, and cold-pressed yuja seed oil were prepared using 60% methanol (ES, EHO, and ECO, respectively). The key compounds in the extracts were determined using HPLC-MS. Among the extracts, EHO and ECO inhibited proliferation of HT-29 cells. EHO and ECO were fractionated using preparative LC and the bioactive compounds were determined. Five of the fractions showed a significant antiproliferative effect and the main compounds in the fractions were isopimpinellin, bergapten, and ichangensin. These compounds showed anti-proliferative effects on HT-29 cells when treated individually, and ichangensin showed the highest anti-proliferative activity. These results suggest that these compounds may be responsible for the anti-cancer effect of EHO and ECO.

Effect of Black Raspberry Seed Oil on Inflammatory Markers in Serum, Liver, and Adipose Tissue of db/db Mice

Hee Jae Lee,Hana Jung,Hyunnho Cho,Keum Taek Hwang 한국식품영양과학회 2015 한국식품영양과학회 학술대회발표집 Vol.2015 No.8

가열 처리한 더덕 열수추출물의 이화학 및 관능 특성

안수지(Susie Ahn),김재철(Jaecheol Kim),조현노(Hyunnho Cho),박선영(Sun Young Park),황금택(Keum Taek Hwang) 한국식품과학회 2016 한국식품과학회지 Vol.48 No.2

본 연구에서는 더덕 껍질의 활용도를 높이고 식품소재, 특히 차원료로서의 가능성을 제시하기 위하여 더덕을 껍질과 육질로 나누어 가열 처리한 더덕으로부터 열수추출물을 제조하여 이화학 및 관능 특성을 비교하였다. 더덕 열수추출물의 pH는 껍질이 육질보다 낮았고(p<0.05), 색도는 볶은 껍질과 육질의 L값이 낮고 b값이 높았다(p<0.05). 총당 함량은 껍질의 경우에 증건군이 볶음군보다 많았으나(p<0.05), 환원당 함량은 껍질의 경우에 열풍건조군이, 육질의 경우에 대조군이 많았다. 조 사포닌 함량은 대조군 육질, 볶은 육질, 열풍건조한 육질에 많았다(p>0.05). 껍질의 열수추출물이 육질의 열수추출물보다 총 폴리페놀 함량이 많고 DPPH 라디칼 소거능도 높았다(p<0.05). 더덕 분말을 차로 만들어 관능검사한 결과, 더덕 껍질로 만든 차는 향과 전반적 기호도에서 더덕 육질로 만든 차와 유의적 차이가 없었다(p>0.05). 결론적으로 대부분 폐기물 처리되는 더덕 껍질은 육질보다 총 폴리페놀 함량이 많고 산화방지 활성이 뛰어났으며, 더덕 껍질 차의 향과 전반적 기호도가 더덕 육질로 만든 차와 유사한 관능 특성을 가지고 있으므로 차의 재료로 활용할 수 있을 것으로 기대한다. In this study, the physicochemical and sensory characteristics of hot water extracts of Codonopsis lanceolata root skin (RS) and root flesh (RF) subjected to different heat treatments were analyzed to determine whether C. lanceolata RS can be used as a tea material. C. lanceolata RS and RF were roasted, hot-air dried (HDS and HDF, respectively), or steamed and hot-air dried (SHDS and SHDF, respectively). The heat-treated samples were extracted with hot water (90℃) for 90 min. The hot water extracts of RS and RF had lower L-values and higher b-values than the other samples. The RS extracts had significantly higher polyphenol content and DPPH radical scavenging activities than RF samples. In the sensory evaluation, the color acceptability of the teas made from CS, HDS, and SHDS were found to be significantly different from those of the teas made from their respective flesh samples. The results suggest that the hot water extract of the C. lanceolata RS can be utilized as a tea material.

Dietary Black Raspberry Seed Oil Ameliorates Inflammatory Activities in db/db Mice

Lee, Hee Jae,Jung, Hana,Cho, Hyunnho,Lee, Kiuk,Kwak, Ho-Kyung,Hwang, Keum Taek Springer 2016 Lipids Vol.51 No.6

<P>The objective of this study was to evaluate the status of the markers related to inflammation in db/db mice fed black raspberry seed (BRS) oil, which is rich in alpha-linolenic acid. Mice were divided into four groups: (1) C57BL/6 mice fed 16 % calories from soybean oil (normal CON); (2) C57BL/KsJ-db/db mice fed 16 % calories from soybean oil (CON); (3) C57BL/KsJ-db/db mice fed 8 % calories from soybean and 8 % calories from BRS oil (BRS 50 %); and (4) C57BL/KsJ-db/db mice fed 16 % calories from BRS oil (BRS 100 %). After 10 weeks, n-6/n-3 fatty acid ratios were significantly (P < 0.05) lower in the livers and epididymal adipose tissues of the BRS 50 % and BRS 100 % mice than in the CON. Serum TNF alpha and IL-6 were significantly (P < 0.05) lower in the BRS 50 % and BRS 100 % than in the CON. Serum IL-10 was significantly (P < 0.05) higher in the BRS 100 % than the CON. In the liver and epididymal adipose tissue, mRNA levels of pro-inflammatory markers in the BRS 50 % and BRS 100 % were lower than in the CON. Anti-inflammatory markers were higher in the epididymal adipose tissues of the BRS 50 % and BRS 100 % than in the CON. In the epididymal adipose tissue, macrophage infiltration markers (F4/80 and CD68) and leptin mRNA were significantly (P < 0.05) lower in the BRS 50 % and BRS 100 % than in the CON. Results of this study suggest that BRS oil may have anti-inflammatory effects in obese diabetic mice by ameliorating inflammatory responses.</P>

Bioactivities of the Herb Extracts Used for Gamhongroju, a Korean Liqueur

Sae-Rom Lee,Hana Jung,Hyunnho Cho,Changho Jhin,Keum Taek Hwang,Seok Tae Jeong,Tae-Young Kim 한국식품영양과학회 2011 Preventive Nutrition and Food Science Vol.16 No.4

In this study, antioxidative and anti-inflammatory activities of the herb (cinnamon, clove, glehnia root, ginger, violet-root cromwell, licorice, citrus peel and longan) extracts used for gamhongroju, one of the popular liqueurs in Korea, were investigated. Twenty grams of individual herbs were extracted in 60% purified ethanol and freeze-dried. A mixture of the individual herb extracts (HEM) was separately prepared. Cytotoxicity of the individual extracts and HEM on murine RAW264.7 macrophage cells were examined along with their recovering activity on H2O2-treated RAW264.7 cells. Antioxidant and anti-inflammatory activities of the extract-treated cells were determined by measuring superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities, and Trolox equivalent antioxidant capacity (TEAC), nitric oxide (NO) and prostaglandin E2 (PGE2) levels. Violet-root cromwell extract showed the least cytotoxicity in terms of treated concentration. Most of the extracts, below levels of cytotoxicity, recovered the H₂O₂-treated cells. Treatment with some of the extracts increased SOD and GPx activities and TEAC levels while a majority inhibited the production of NO and PGE2 in lipopolysaccharide (LPS)-treated cells.

<i>Aster pseudoglehni</i> extract stimulates cholecystokinin and serotonin secretion <i>in vitro</i> and reduces gastric emptying <i>in vivo</i>

Kim, Hye Young,Kim, Kyong,Lee, Yu Mi,Cho, Hyunnho Elsevier 2017 Journal of Functional Foods Vol.35 No.-

<P><B>Abstract</B></P> <P> <I>Aster pseudoglehni</I> (Asteraceae) (AP) is a perennial plant from the Asteraceae family that is indigenous to Korea, and has traditionally been used as famine relief food in Korea. However, the effect of AP on food intake has not been characterized scientifically. The present study aimed to investigate the effect of the aqueous ethanolic extract of AP (AEE-AP) on food intake-related parameters <I>in vitro</I> and <I>in vivo</I>. AEE-AP stimulated cholecystokinin (CCK) secretion in enteroendocrine STC-1 cells, and serotonin (5-HT) secretion in RIN14B cells, an enteroendocrine cell model. Furthermore, AEE-AP affected physiological processes related to food intake in rats. Single oral administration of AEE-AP activated c-Fos in the dorsal vagal complex (DVC) and the arcuate nucleus of the hypothalamus (ARC), and delayed gastric emptying in rats. Our results demonstrated that AEE-AP regulated food intake-related parameters in the enteroendocrine system and gastrointestinal motility that affect food intake and eventually obesity.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>Aster pseudoglehni</I> (AP) stimulated cholecystokinin and serotonin secretion <I>in vitro</I>. </LI> <LI> Oral administration of AP activated c-Fos in brain feeding regions in rats. </LI> <LI> Oral administration of AP delayed gastric emptying in rats. </LI> </UL> </P>

Analysis of the Cytotoxicity of Green Pigment Produced on the Surface of Roasted and Retorted Chestnuts Using Immune Cells and Gastrointestinal Cancer Cells

Hana Jung,Ji-Hyun Jeong,Hee Soon Cheon,Jun-Bong Choi,Hyunnho Cho,Changho Jhin,Keum Taek Hwang 한국식품영양과학회 2011 Preventive Nutrition and Food Science Vol.16 No.3

Roasted and retorted (RR) chestnuts develop green pigment spots on their surface during storage. The purpose of this study was to evaluate the cytotoxicity of the green pigment using RAW 264.7, MOLT-4, KATOⅢ and HT-29 cells. The pigment scraped from RR chestnuts (GP), whole RR chestnuts with green pigment spots (GC), whole RR chestnuts without green pigment (WC) and roasted and frozen stored chestnuts (FC) were extracted in 10% DMSO. MOLT-4 cells were less resistant to the cytotoxicity of the chestnut extracts than the RAW 264.7 cells. The GP extracts did not show different responses against H2O2-induced oxidative stress and LPS-induced NO production compared to the other extracts. The chestnut extracts did not have proliferative activity on either of the KATOⅢ or HT-29 cells (p>0.05). Our results from the comparison of the green pigment produced on the surface of the RR chestnuts to chestnuts that do not develop the green pigment suggest that the pigment may not be harmful in terms of either cytotoxicity towards immune cells or proliferation of gastrointestinal cancer cells.

국내산 나무딸기류 과일의 항산화 및 암세포 항증식 활성

정하나(Hana Jung),이희재(Hee Jae Lee),조현노(Hyunnho Cho),황금택(Keum Taek Hwang) 한국식품영양과학회 2012 한국식품영양과학회지 Vol.41 No.12

본 연구에서는 국내에서 재배한 나무딸기류 과일(blackberry, Korean raspberry, black raspberry, boysenberry, golden raspberry)을 손으로 으깨거나 녹즙기를 사용하여 추출하여 이 추출물의 항산화 성분 및 항산화능을 분석하고, in-vitro 모델을 이용하여 각 추출물의 NO 소거능과 암세포 항증식 활성을 분석하였다. 과일추출물의 총 polyphenol과 flavonoid 함량은 각각 0.6~8.9 mg/g과 0.1~7.9 mg/g으로 그 종류에 따라 다양하였다. Black raspberry 추출물은 갈지 않고 추출하여도 다른 나무딸기류 과일에 비하여 polyphenol과 flavonoid를 매우 많이 함유하고 있었으며, blackberry, Korean raspberry, golden raspberry를 갈아서 추출한 것이 으깨어서 추출한 것보다 polyphenol 함량과 항산화능이 유의적으로 높았다. 또한 나무딸기류 과일추출물의 항산화능은 총 polyphenol(R=0.995) 및 flavonoid(R=0.967) 함량이 높을수록 증가하는 상관관계가 있었다. 나무딸기류 과일추출물 모두 0.25 mg/mL 이상의 농도에서 유의적인 NO 소거능을 보였으며, 과일을 으깨어 추출한 것과 갈아서 추출한 것 간에 차이는 없었다. 나무딸기류 과일추출물을 0.1, 0.25, 0.5 mg/mL의 농도로 HT-29와 KATO-3 암세포에 처리하였을 때 이들 세포의 증식을 각각 3~32%와 0~57%씩 억제시켰다. Blackberry와 Korean raspberry는 0.5 mg/mL 농도에서 갈아서 추출한 추출물이 으깬 것보다 유의적으로 HT-29 암세포 증식을 억제했으며, KATO-3 암세포에서는 과일을 으깨어 추출한 것과 갈아서 추출한 것 간에 차이가 없었다. 나무딸기류 과일추출물의 NO 소거능이 증가할수록 HT-29(R=0.602)와 KATO-3(R=0.498) 암세포 증식 억제효과도 증가하였다. This study was conducted to determine the polyphenols, flavonoids and antioxidant activity (FRAP) of the extracts (crushed by hand or a homogenizer) of Rubus fruits (blackberry, Korean raspberry, black raspberry, boysenberry and golden raspberry) produced in Korea. In addition, their nitric oxide (NO) scavenging activity in RAW 264.7 cells and anti-proliferative activity in HT-29 and KATO-3 cells were investigated. Polyphenol and flavonoid contents in the Rubus fruits ranged from 0.6 to 8.9 and from 0.1 to 7.9 mg/g fresh fruit, respectively. Black raspberry had the highest polyphenol and flavonoid contents among the Rubus fruits. The homogenized extracts of blackberry, Korean raspberry and golden raspberry fruits showed significantly higher polyphenol and FRAP values than the hand-crushed extracts. FRAP values of the Rubus fruit extracts were significantly correlated with their polyphenol (R=0.995) and flavonoid (R=0.967) contents. The Rubus fruit extracts suppressed the NO secretions in LPS-treated RAW264.7 cells. There were no significant differences between extracts obtained by crushing by hand and those obtained using a homogenizer. Proliferation rates of HT-29 and KATO-3 cancer cells treated with the Rubus fruit extracts at 0.1, 0.25 and 0.5 mg/mL were reduced by 3~32% and 0~57%, respectively. The homogenized extracts of blackberry and Korean raspberry fruits had significantly higher anti-proliferation activity against HT-29 cancer cells than the hand-crushed extracts. However, extraction method did not show any significant difference on proliferation of KATO-3 cancer cells. The NO scavenging activity of the Rubus fruit extracts were significantly correlated with the anti-proliferation activities of the HT-29 (R=0.602) and KATO-3 cells (R=0.498).