Biogenic amine formation and bacterial contribution in <i>Cheonggukjang</i>, a Korean traditional fermented soybean food

Jeon, Ah Ran,Lee, Jae Hoan,Mah, Jae-Hyung Elsevier 2018 LWT- Food science and technology Vol.92 No.-

<P>To evaluate the safety of Cheonggukjang, 60 different samples collected from 8 provinces all across the country were analyzed for biogenic amine contents by HPLC. The aromatic vasoactive amine (beta-phenylethylamine and tyramine) contents in some Cheonggukjang samples exceeded safe levels for consumption. Bacterial and enterococcal counts of Cheonggukjang samples were 9.70 +/- 0.43 and 6.00 +/- 1.52 Log CFU/g, respectively, and strains of Bacillus (n = 433) and Enterococcus (n = 55) isolated from Cheonggukjang samples were tested for biogenic amine production in assay media. Histamine and putrefactive amines (putrescine and cadaverine) were detected more abundantly in cultures of Bacillus strains, while tyramine was detected in larger quantities in cultures of Enterococcus strains. Subsequently, strains selected based on their specific abilities to produce the aforementioned respective biogenic amines were applied to soybeans to undergo fermentation, and biogenic amine contents in the soybeans were measured during the fermentation period. Unexpectedly, Bacillus strains produced slightly lower levels of histamine, but significantly higher levels of beta-phenylethylamine and tyramine than Enterococcus strains. Altogether, this study suggests that Bacillus species are as significant as Enterococcus species for biogenic amine production in Cheonggukjang, including tyramine, and should be controlled accordingly for the reduction of biogenic amine contents in the food.</P>

Effect of maxillary sinus graft on the survival of endosseous implants: A 10-year retrospective study

Jeon, Hye-Ran,Pang, Eun-Kyoung,Pae, Ah-Ran,Kim, Myung-Rae,Kang, Na-Ra Korean Academy of Periodontology 2008 Journal of Periodontal & Implant Science Vol.38 No.2

Purpose: The aim of this study was to determine the survival rates of implants placed in grafted maxillary sinuses and compare the results obtained with graft materials, implant surfaces and timing of implant placement. Materials and Methods: Between January 1996 and December 2005, 391 implants were placed in 161 patients who underwent sinus grafting treatment simultaneously or separately at Ewha Womans University Hospital. According to inclusion criteria, 272 implants were placed in 102 patients with 112 sinus grafts (30 females, 72 males), aged 26 to 88 years (mean age $49.0{\pm}9.7$). The follow-up period ranged from 12 to 134 months (mean F/U $47{\pm}32$). Survival rates were evaluated according to graft material, implant surface and timing of implant placement. The Kaplan-Meier procedure and the log rank (Mantel-Cox) test were used to estimate survival rates and test for equality of survival rates between different groups of patients. Results: Ten-year cumulative survival rate for implants placed in the grafted sinuses was 90.1%. The survival rates for autogenous bone, combination and bone substitutes were 94.6%, 85.9% and 100%, respectively (p > 0.05). According to implant surface, survival rates were 84.8% in machined group and 97.5% in rough group (p < 0.05). The survival rates were 92.9% in delayed group and 86.0% in simultaneous group (p > 0.05). Conclusion: Ten-year cumulative survival rate for implants placed in the grafted sinuses was 90.1%. Rough-surfaced implants have a higher survival rate than machined-surfaced implants when placed in grafted sinuses (p < 0.05).

Screening of Starter Candidates for Reduction of Biogenic Amines in Cheonggukjang

Ah Ran Jeon,Kyung Mi Son,Ji Eun Song,Hye Jin Song,Bo Young Byun,Il Beom Park,Xuezhi Bai,Jung Hyuck Park,Jae-Hyung Mah 한국식품영양과학회 2012 한국식품영양과학회 학술대회발표집 Vol.2012 No.10

인동꽃 에센셜 오일의 항산화 및 항염 활성

전아림 ( Ah-lim Jeon ),이미란 ( Mi-ran Yi ),강창희 ( Chang-hee Kang ),부희정 ( Hee-jung Bu ) 대한미용학회(구 대한미용과학회) 2016 대한미용학회지 Vol.12 No.4

This study examined the antioxidant and anti-inflammatory effects of essential oil from the flowers of Lanicera japonica in order to verify whether the oil can be used as a cosmetic ingredient. Antioxidative capacity was evaluated by bioassay using total polyphenol and flavonoid contents as well as 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity. Total polyphenol and flavonoid contents were 31.8±1.1 mg GAE/g and 42.0±0.6 mg QE/g, respectively. ABTS radical scavenging activity was 84.6±0.3% and DPPH free radical scavenging activity was 42.2±1.3% (at a concentration of 500 μg/mL). The antimicrobial activity of essential oil from the flowers of L. japonica against skin pathogens was determined using the paper disc diffusion method, the minimum inhibitory concentration, and the minimum bactericidal concentration values. Essential oil from L. japonica flowers showed antimicrobial activities against Staphylococcus aureus and Propionibacterium acnes. For the study of anti-inflammatory activity in RAW 264.7 cell, essential oil from L. japonica flowers inhibited not only nitrogen oxide production but also the expression of pre-inflammatory cytokines such as, tumor necrosis factor-α, interleukin (IL)-6 and IL-1β in a dose-dependent manner. Especially, at a concentration of 400 μg/mL, essential oil from L. japonica flowers strongly inhibited the cytokines production by 96.4±0.2, 72.6±4.5, 99.1±5.7, 97.6±2.6%, respectively. These results suggests that essential oil from L. japonica flowers has considerable potential as a cosmetic ingredient with antioxidative and anti-inflammation effects.

An Effective Method of Anesthesia in Canine Model Experiment

Hye-Ran Jeon,Sun-Kyoung Lee,Seoung-Ho Lee,Keum-Ah Han 한국실험동물학회 2006 Laboratory Animal Research Vol.22 No.4

In dentistry, new dental materials and techniques is developing rapidly and needs for research about these materials and techniques are increasing. In department of periodontology, Ewha Womans University, many experiments about management of alveolar bone defect, implant procedure in maxillary sinus, guided tissue regeneration (GTR) procedure, treatment of peri-implantitis have been carried out using Canis familiaris. In carrying these experiment, we found very effective and clinical method of animal anesthesia. This method is composed of intramuscular injection of ketamine and xylazine and inhalation anesthesia using enflurane. Purpose of this report is to describe an effective anesthesia method in canine model experiment.

결절맥락막혈관병증 환자에서 라니비주맙치료군과 애플리버셉트치료군 간의 치료 효과 비교

Minkyung Song,Ah Ran Cho,Yoon Jeon Kim,June-Gone Kim,Young Hee Yoon,Joo Yong Lee 한국망막학회 2018 Journal of Retina Vol.3 No.1

Purpose: To compare the clinical efficacy of intravitreal ranibizumab and aflibercept in treatment-naïve patients with polypoidal choroidal vasculopathy (PCV). Methods: We retrospectively analyzed the medical records of 82 eyes with treatment-naïve PCV who were treated with ranibizumab or aflibercept and followed for at least six months. Best-corrected visual acuity (BCVA), central foveal thickness (CFT) as measured by optical coherence tomography (OCT), and polyp size in indocyanine green angiography (ICGA) were used for evaluation. The primary endpoint was change at 12 months relative to baseline with respect to BCVA and CFT. Secondary endpoints were anatomical changes in OCT and ICGA findings from baseline. Results: Data from 46 eyes were considered for the primary endpoint. Twenty-five and 21 eyes received ranibizumab and aflibercept, respectively. Statistically significant improvements in BCVA and CFT compared with baseline were noted in both groups. Of 82 eyes assessed for secondary endpoints, 52 and 30 received ranibizumab and aflibercept, respectively. The subretinal fluid , pigment epithelial detachment , and subfoveal thickness decreased significantly throughout the follow-up in each group. Polyp regression was found in 37.5% and 32.4% of the ranibizumab- and aflibercept-treated groups, respectively. However, there was no significant difference in the treatment results between the drugs. Conclusions: In a comparison of the clinical efficacy of intravitreal ranibizumab and that of aflibercept in patients with PCV, the treatment groups showed similar clinical results in terms of functional and anatomical outcomes after 12 months.

국내산 대나무 3종의 해부학적 특성

전우석 ( Woo-seok Jeon ),김윤기 ( Yun-ki Kim ),이주아 ( Ju-ah Lee ),김아란 ( Ah-ran Kim ),( Byantara Darsan ),정우양 ( Woo-yang Chung ),김남훈 ( Nam-hun Kim ) 한국목재공학회 2018 목재공학 Vol.46 No.1

본 연구에서는 주요 바이오매스 자원의 하나인 대나무의 효율적 활용을 위한 기초자료를 수집하기 위하여, 국내산 대나무 3종(맹종죽, 솜대 및 왕대)의 해부학적 특성을 광학현미경 및 주사전자현미경으로 비교·분석하였다. 또한 X선 회절법에 의해 셀룰로오스의 결정특성을 분석하였다. 횡단면 관찰 결과, 3종 모두 유관속Ⅰ형으로 종간 동일한 형태를 보였다. 또한 횡단면의 내측부에서 외측부로 갈수록 유관속의 출현빈도가 더 높았고, 유관속을 둘러싸고 있는 유관속초의 비율도 커졌다. 구성세포 치수 측정 결과, 섬유길이는 모든 종에서 외측부의 값이 내측부의 값보다 컸으며, 내측부와 외측부 모두 왕대의 섬유길이가 가장 길었다. 섬유길이의 유의성 검정 결과 3종 모두 내측부와 외측부간에 유의성이 나타났다. 횡단면에서 측정한 도관 직경 및 유세포 직경은 맹종죽의 값이 가장 컸으며, 방사 및 접선단면에서 측정한 유세포 길이 및 폭은 맹종죽과 왕대가 유사한 값을 나타냈고, 솜대가 가장 작았다. 셀룰로오스의 결정특성 분석 결과 상대결정화도 및 결정 폭은 외측부가 내측부에 비해 다소 높았으며, 왕대의 상대결정화도 및 결정 폭이 다른 2종에 비해 다소 높았다. Bamboo is one of the major biomass resources in the world. To obtain valuable information for effective use of bamboo resources in Korea, the anatomical characteristics of the commercial Korean bamboo species (Phyllostachys pubescens, Phyllostachys nigra, and Phyllostachys bambusoides) were analyzed. The structures in bamboo culm were observed by optical and scanning electron microscopy. Also the crystalline properties as relative crystallinity and crystallite width were measured by an X-ray diffraction method. The three Korean bamboo species had the vascular bundle type Ⅰ with tylosoid in intercellular space. In the outer part of culm, vascular bundles showed denser spacing than inner part. The fiber length in outer part samples of the three bamboo species showed longer than inner part samples. Furthermore, the fiber length showed a significant difference between inner part and outer part in three bamboo species, showing the longest fiber length in Phyllostachys bambusoides. Phyllostachys pubescens showed the greatest diameter in vessel and parenchyma on cross section. Parenchyma cells in Phyllostachys pubescens and Phyllostachys bambusoides showed similar length and width in both radial and tangential sections. The relative crystallinity and crystallite width in outer part samples of the three bamboo species showed higher values than those in inner part samples, with the greatest values from Phyllostachys bambusoides.

[P10-94] Isolation of Two Antioxidative Compounds from a Medicinal Herb, Ulmi Cortex

Uhee Jung,Yoon-Ah Lee,Ill-Yun Jeong,Soyeong Jeon,Kwon Jeong,Hae-Ran Park,Sung-Kee Jo 한국식품영양과학회 2006 한국식품영양과학회 학술대회발표집 Vol.2006 No.10

Enhanced light output power of near UV light emitting diodes with graphene / indium tin oxide nanodot nodes for transparent and current spreading electrode

Seo, Tae Hoon,Lee, Kang Jea,Park, Ah Hyun,Hong, Chang-Hee,Suh, Eun-Kyung,Chae, Seung Jin,Lee, Young Hee,Cuong, Tran Viet,Pham, Viet Hung,Chung, Jin Suk,Kim, Eui Jung,Jeon, Seong-Ran The Optical Society 2011 Optics express Vol.19 No.23

Qualitative and Quantitative Anatomical Characteristics of Four Tropical Wood Species from Moluccas, Indonesia¹

Wahyu Hidayat,Yun Ki Kim,Woo Seok Jeon,Ju Ah Lee,Ah Ran Kim,Se Hwi Park,Rohny S Maail,Nam Hun Kim 한국목재공학회 2017 목재공학 Vol.45 No.4

The objective of this study was to compare the wood anatomical characteristics of local tree species in Moluccas, Indonesia i.e., Moluccan ironwood (Intsia bijuga), linggua (Pterocarpus indicus), red meranti (Shorea parvifolia), and gofasa (Vitex cofassus). Qualitative evaluation was conducted by observing the anatomical structure in cross, radial, and tangential sections of each sample. For the quantitative evaluation, the dimensions of vessels, rays, and fibers were measured. Qualitative evaluation showed that crystals were observed in Moluccan ironwood, linggua, and gofasa, while resin canals were only observed in red meranti. Tyloses were frequently observed in gofasa but infrequently observed in linggua and red meranti. Quantitative evaluation showed that Moluccan ironwood with the higher density had thicker fiber wall, higher quantity of ray number, and wider rays than the other species. Red meranti had higher values of ray height and fiber length than the other three species. The results also revealed that linggua showed the highest values of relative crystallinity and crystallite width. Red meranti and gofasa showed similar values of relative crystallinity and crystallite width, while Moluccan ironwood showed the lowest values. The basic qualitative and quantitative anatomical characteristics discussed could provide useful information for further utilizations of such wood species.