Chemosentization effects of cyclic lipopeptides produced by Bacillus amyloliquefaciens JCK-12 on the chemical control of phytopathogenic fungi

Areum Ha,Ae Ran Park,Nan Hee Yu,Ja Yeong Jang,Hokyoung Son,Hae Woong Park,Gyung Ja Choi,Theresa Lee,Jin-Cheol Kim 한국농약과학회 2018 한국농약과학회 학술발표대회 논문집 Vol.2018 No.10

Comparison of Rice Amylose Analysis in Korea and Japan

Areum Chun,Mi-Ra Yoon,Sea-Kwan Oh,Dae-Jung Kim,Ha-Cheol Hong,Im-Soo Choi 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04

Measurement of amylose content is commonly employed as the predictor of rice quality. Amylose is usually measured by absorbance of the amylose-iodine complex by a variety of ways. However, the effort to standardize the way amylose is measured is still working through the world of rice research. For comparing rice amylose analysis methods in Korea and Japan, major japonica rice-producing countries, rice samples with different amylose contents were selected. The rice samples were harvested, dried and milled at the National Institute of Crop Science, Rural Development Administration in Suwon, Republic of Korea. Amylose contents (AC) were analyzed using Concanavalin A method and modified Juliano methods, as representative methods in Korea and Japan, respectively. The AC of rice starch by Concanavalin A method were ranged 9.4~28.8%, on the other hand, the AC of rice flour by modified Juliano method had a wider range AC, 8.7~41.8%; for example, AC of semi-waxy varieties had lower values and AC of high amylose varieties had higher values in modified Juliano methods, even more than 10%. High correlation coefficients between retrogradation (or gelatinization) and AC using Concanavalin A would indicate that the Concanavalin A method could be more explanatory for evaluating rice quality like gelatinization and retrogradation.

도정도에 따른 소곡주의 품질 및 기호도 변이

천아름(Areum Chun),김대중(Dae-Jung Kim),윤미라(Mi-Ra Yoon),오세관(Sea-Kwan Oh),최임수(Im-Soo Choi),홍하철(Ha-Cheol Hong),김연규(Yeon-Gyu Kim) 한국식품영양과학회 2012 한국식품영양과학회지 Vol.41 No.1

한국 전통주인 ‘한산 소곡주’의 품질 연구를 위해 원료인 찰벼의 도정 정도에 따른 주질 특성을 살펴보았다. 소곡주의 원료로 주로 사용되는 동진찰벼를 현미 중량을 기준으로 92%(10분도), 84%(20분도), 76%(30분도), 68%(40분도) 수준으로 도정하여 소곡주를 제조하여 그 원료곡과 소곡주의 품질 특성과 그에 따른 기호도 변화를 분석하였다. 먼저 원료곡의 품질 특성은 도정도가 증가할수록 단백질, 지방 및 회분 함량이 급격히 감소하였으며 색 및 형태적인 변화를 수반하였고, 이는 기존의 보고와 일치하는 결과였다. 도정도에 따른 수분함량의 차이는 없었으며, 10분도를 제외하고는 물리적인 경도 차이도 나타나지 않아, 10분도 이상 시료의 경도 감소는 주로 단백질 함량의 감소와 연관된 것으로 판단되었다. 호화특성 또한 도정도가 증가할수록 전체적인 점성이 증가하는 양상을 뚜렷이 보임을 알 수 있었다. 이는 일차적으로 호화를 억제하는 단백질, 지방 성분들의 감소에 따른 것으로 판단되었으며, 이차적으로 아밀로펙틴 분지 구조가 도정도 증가에 따라 중쇄는 증가하고 장쇄는 감소하는 변화를 나타내어 이에 따른 영향이 있을 것으로 추정되었다. 도 정도에 따른 소곡주 품질은 먼저 전분함량의 증가에 따라 제조수율이 증가하였으며, 알코올 함량의 유의한 차이는 없었으나, 당도와 유리당 함량이 감소하고 총 산도는 증가하여 단맛이 감소하고 신맛이 증가함을 확인할 수 있었다. 색 특성도 20분도 이상부터 명도는 감소하고 황색도가 증가하는 경향이 뚜렷하였으나 소곡주 색 특성에 대한 연구가 전무하여 관련 연구가 필요할 것으로 판단되었다. 도정도별로 소곡주의 소비자 기호도 검사를 실시한 결과 원료곡의 도정도가 증가할수록 소곡주의 소비자 기호도가 떨어지는 것으로 나타났다. 또한 소비자 기호도와 도정도에 따른 소곡주 품질의 상관관계 분석 결과, 소비자 기호도가 소곡주의 당도 및 포도당 함량, pH 및 원료곡의 단백질 함량과 상관관계를 나타내어, 원료곡 도정에 따른 소곡주 고유의 달고 풍부한 맛의 감소가 낮은 소비자 기호도의 원인인 것으로 판단되었다. Sogokju, a Korean glutinous rice wine and one of the oldest Korean traditional wines, is famous for its unique taste acquired from a 100-day incomplete fermentation process. This study investigated the effects of the degree of rice milling on the physicochemical and sensory characteristics of Sogokju. It evaluated the physicochemical characteristics, pasting and color properties, and structural properties of starch using four different degrees of milled rice (Oryza sativa L.) cultivar Dongjinchalbyeo. Samples of brown rice with milling yields of 92%, 84%, 76%, and 68% were produced using both abrasive and friction whiteners. This study showed that the protein, lipid, and ash content of milled rice decreased as the degree of milling increased. The lower hardness of the kernel below milling yield 92% suggested that milling may be related to the lower protein content of the kernel. The pasting curve showed a significant increase in viscosity properties as the degree of milling increased. This is due to the decrease in protein and lipid content, the increase in starch content, and the difference in amylopectin chain-length distribution. Further milling of white rice, based on 92% milling yield, had an effect on the amylopectin chain-length distribution due to the degree of polymerization (DPn) of 37~60. The long chain of amylopectin also contributed to the viscosity. The increase in the degree of milling decreased the glucose and total sugar content of Sogokju. However, it increased the total acidity of Sogokju. Moreover, the lightness of Sogokju decreased while its yellowness increased. These results indicate that the degree of milling can alter the taste and color of Sogokju. The sensory evaluation showed that the increase in the degree of milling decreased consumer preference for Sogokju. The sensory score for Sogokju was positively correlated with its brix degree, glucose content, pH, and protein content of raw rice.

Knock sensing and imaging from structural bending waves

Sangyul Ha,Areum Jang,이경준,손성호 한국통신학회 2022 ICT Express Vol.8 No.4

This paper presents a novel knock imaging technique for human-to-things interfaces. It allows any object to use its own surface as an imaging sensor. The methodology is to sense the structural bending waves caused by the knock and reconstruct the intensity image through the beamforming of the wave signals. To verify this, we prepare a thin piezoelectric sensor array on a square plate. The performances are evaluated by measuring the beam peak, beamwidth, and sidelobe level in the reconstructed image. Finally, a real finger knock test is demonstrated, showing an image reconstruction that the position error is only 3 mm.

뇌졸중 환자의 연하장애 치료 효과에 대한 체계적 고찰

Sung-Kyu Ha,Areum Han,Ki-Eun Kim,Hye-Sik Lee 대한연하장애학회 2019 대한연하장애학회지 Vol.9 No.1

Objective: Dysphagia is a major complication of stroke and causes serious problems, such as lung aspiration. Previous reviews of dysphagia treatments for stroke were limited due to a dearth of available studies. More trialshave been published recently warranting a re-examination of the evidence. The purpose of this systematic reviewwas to examine the effectiveness of interventions for dysphagia in adults following stroke. Methods: The PRISMA Statement with a 27-item checklist was used as a general guide to conduct and reporta quality systematic review. Five electronic databases were searched for randomized controlled trialspublished in English between 2008 and 2017 examining the effectiveness of dysphagia interventionsfollowing stroke. The search terms were entered by combining the keywords related to dysphagia, stroke,interventions, and randomized controlled trials. Results: Fifteen articles were included; the most commonly used interventions were Transcranial MagneticStimulation (4 articles), Neuromuscular Electrical Stimulation (4 articles), and Pharyngeal electrical stimulation(4 articles). Conclusion: This review provides evidence of the effectiveness of interventions for people with dysphagiafollowing stroke, but there were some mixed results. The heterogeneity of the outcome measures as wellas the mixed results highlight the need for further research.

Detection of viable transgenic plant cells in rice callus suspension cultures using PCR combined with Propidium Monoazide treatment

Yang Qin,Yang Ha Kim,Seonha Park,Mingwan Cheon,Areum Jeong,Bumkyu Lee 한국육종학회 2023 한국육종학회 공동학술발표집 Vol.2023 No.-

Effect of Lipopolysaccharide (LPS) on Mouse Model of Steroid-Induced Avascular Necrosis in the Femoral Head (ANFH)

( So Yoon Ryoo ),( Suk Ha Lee ),( Seung Hyun Jo ),( Si Young Lee ),( Areum Kwak ),( Eun Som Kim ),( Jong Ho Lee ),( Jae Woo Hong ),( Hyun Jhung Jhun ),( Young Min Lee ),( Anshul Shyam Sobti ),( Soo Hy 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.3

Avascular necrosis of the femoral head (ANFH) is commonly observed in patients treated with excessive glucocorticoid (GC). Single administration of lipopolysaccharide (LPS) has shown to induce immune stimulatory factors. However, the effect of repeated administration of LPS on GC-induced ANFH has not been studied. Thus, the purpose of this study was (i) to examine the cytokine profile induced by repeated LPS administrations and (ii) to test the effect of repeated LPS treatments on GC-induced ANFH. A mouse necrosis model of ANFH was designed by chronic GC administration with co-treatment of LPS. Mice body weights in the LPS/prednisolone (PDN) co-treated group were lower than that of the untreated control group, but spleen weights were greater than the control group. The levels of IL-6, TNFα, and IL-33 in the liver and spleen of the LPS/PDN group were lower than the untreated control group, whereas TNFα level in the femoral head of the LPS/PDN group increased. Collectively, the effect of repeated LPS on the pathogenesis of GC-induced ANFH was associated with the TNFα level in the femoral head, but the pathogenesis did not correspond to cytokine levels in immune tissues.

Physicochemical Characteristics of Starches in Rice Cultivars of Diverse Amylose Contents

Mi-Ra Yoon,AReum Chun,Sea-Kwan Oh,Ha-Cheol Hong,Im-Soo Choi,Jeong-Heui Lee,Young-Chan Cho,Yeon-Gyu Kim 한국작물학회 2012 Korean journal of crop science Vol.57 No.3

Through the sampling four rice cultivars with differing amylose contents, the relationship between the structural and gelatinization properties of endosperm starches was analyzed. These rice varieties exhibited different chain length distribution ratio within the amylopectin cluster as well as varing amylose levels. The proportion of amylopectin short chains of in Goami cutlivars was higher than the other varieties, whereas the Goami 2 which shows amylose extender mutant properties in the endosperm showed the highest proportion of long chains. In X-ray diffraction analysis of rice starches, the Goami 2 variety displayed a B-type pattern whereas the other varieties were all A-type. Among the cultivars with high and normal rice starch levels, those with the higher amylose contents showed distinctly lower swelling. Goami 2 rice was found to have the highest onset and peak gelatinization temperature from the differential scanning calorimetry results. The four rice cultivars under analysis also showed different rates of hydrolysis by amyloglucosidase. These findings suggest that the composition and chemical structure of the starch content is a major determinant of both the gelatinization and functional properties of rice.

The green algae Ulva fasciata Delile extract induces apoptotic cell death in human colon cancer cells.

Ryu, Min Ju,Kim, Areum Daseul,Kang, Kyoung Ah,Chung, Ha Sook,Kim, Hye Sun,Suh, In Soo,Chang, Weon Young,Hyun, Jin Won Springer 2013 In vitro cellular & developmental biology. Animal Vol.49 No.1

<P>This study investigated the mechanisms underlying the cytotoxicity of the green algae Ulva fasciata Delile. U. fasciata extract (UFE) inhibited the growth of HCT 116 human colon cancer cells by 50% at a concentration of 200 μg/ml. In addition, UFE stimulated the production of intracellular reactive oxygen species, an effect that was abolished by pretreatment with N-acetyl cysteine, which also inhibited the cytotoxic effects of UFE. UFE also induced morphological changes indicative of apoptosis, such as the formation of apoptotic bodies, DNA fragmentation, an increase in the population of apoptotic sub-G(1) phase cells, and mitochondrial membrane depolarization. Concomitant activation of the mitochondria-dependent apoptotic pathway occurred via modulation of Bax and Bcl-2 expression, resulting in disruption of the mitochondrial membrane potential and activation of caspase-9 and caspase-3. This is the first report to demonstrate the cytotoxic effect of U. fasciata on human colon cancer cells and to provide a possible mechanism for this activity.</P>

Organ dose reconstruction for Korean radiation workers study

Tae-Eun Kwon,Areum Jeong,Euidam Kim,Junik Cho,Yoonsun Chung,Dal Nim Lee,Songwon Seo,Seokwon Yoon,Wi-Ho Ha,Young woo Jin,Sunhoo Park 대한방사선방어학회 2021 대한방사선방어학회 학술발표회 논문요약집 Vol.2021 No.04