Quality Characteristics of Jeju Beets Treated by Various Drying Conditions

A-Ra Ko,Hee-Jung Jin,Ji-Hyun Im,Jung-Hyun Nam,Ji-Yeon Chun 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10

Beets (Beta vulgaris) contain a lot of betalains, a type of natural pigment, so they are known to be red and have strong antioxidant abilities. This study was conducted to compare the physicochemical properties of Jeju beets processed by hot air drying and combined drying. Beets were sliced to 3 mm and dried by hot air drying (13 hours at 50°C, 6 hours at 60°C, or 4.5 hours at 70°C) or combined drying (hot air and infrared radiation). Appearance, water activity, moisture content, pH, color, rehydration ratio (RR), total polyphenol content (TPC), FRAP value, DPPH radical scavenging ability, and ABTS radical scavenging ability were determined. In hot air drying, as the drying temperature increased, water activity, moisture content, and b* value were decreased while L*, a* value, RR, TPC, FRAP value, and ABTS radical scavenging ability were increased. The combined drying had lower water activity and pH value; moreover, it had a higher L*, a* value, RR, TPC, FRAP value, DPPH radical scavenging ability, and ABTS radical scavenging ability. In this study, it was found that the combined drying was more suitable than hot air drying to maintain the antioxidant ability of beet.

열풍 및 복합건조된 제주산 비트의 이화학적 특성과 항산화 활성

고아라(A-Ra Ko),남정현(Jung-Hyun Nam),진희정(Hee-Jung Jin),임지현(Ji-Hyun Im),김한상(Han-Sang Kim),천지연(Ji-Yeon Chun) 한국식품영양과학회 2022 한국식품영양과학회지 Vol.51 No.6

본 연구에서는 기존 비트의 한계점을 극복하고 고품질의 건조 비트를 제조하기 위한 기초 자료를 제시하고자 제주산 비트를 다양한 온도 조건에서 열풍 및 적외선 복합건조 하였고, 이에 따른 품질변화를 비교하여 건조 조건이 비트의 이화학적 특성과 항산화 활성에 미치는 영향에 대해서 조사하였다. 3 ㎜ 두께로 비트를 절단한 후 70℃에서 4.5시간, 60℃에서 6시간, 50℃에서 13시간 열풍건조 하거나 100℃에서 1시간 복합건조 하였다. 열풍건조한 비트는 건조 온도가 높아질수록 수분함량, 수분활성도, b<SUP>*</SUP>값(황색도), betanin 함량이 감소했고 건조수율과 pH에는 변화가 없었으며, L<SUP>*</SUP> 값(명도), a<SUP>*</SUP> 값(적색도), ΔE 값(건조 전 원물과의 색차), 재복원율, vulgaxanthin-Ⅰ 함량, 총 폴리페놀 함량, DPPH 라디칼 소거능, ABTS⁺ 라디칼 소거능, FRAP 활성은 증가하는 경향을 보였다. 그중에서 수분활성도, a<SUP>*</SUP>값, ΔE 값, FRAP 활성은 건조 온도가 높아짐에 따라 유의적으로 변화하였다. 복합건조한 비트는 열풍건조한 비트보다 L<SUP>*</SUP>값, a<SUP>*</SUP> 값, ΔE 값, 재복원율, 총 폴리페놀 함량, DPPH 라디칼 소거능, ABTS⁺ 라디칼 소거능, FRAP 활성이 유의적으로 높았고 pH는 유의적으로 낮았으며, 수분함량, 수분활성도, b<SUP>*</SUP>값, betanin 함량, vulgaxanthin-Ⅰ 함량에서는 열풍건조한 비트와 유의적인 차이를 나타내지 않았다. 이상의 결과에 따르면 복합건조한 비트가 다른 조건에서 건조를 진행한 비트에 비해 소요되는 시간이 매우 짧고 pH가 낮으며, 재복원율, 총 폴리페놀 함량, 항산화 활성이 높아 고품질의 건조 비트를 제조하기 위해서는 열풍뿐만이 아니라 적외선도 적절히 병용하는 것이 적합할 것으로 보인다. Beet (Beta vulgaris L.) is a healthy food that has recently attracted the consumer’s attention. However, beet has low storage stability due to the high moisture content. Therefore, a drying process is necessary to improve the beet quality. In this study, Jeju beet was dried by applying two processes: hot air drying (4.5 hours at 70℃, 6 hours at 60℃, 13 hours at 50℃) and combined drying (hot air and infrared radiation, 1 hour at 100℃). The effect of both processes was investigated on the physicochemical properties and antioxidant activity was investigated. The dried beets were compared for their appearance, drying yield, moisture content, water activity, pH value, color, rehydration ratio, betalain pigment content, total polyphenol content, DPPH radical scavenging activity, ABTS⁺ radical scavenging activity, and FRAP assay. The beet subjected to combined drying was determined to have high storage properties due to its low moisture content and pH value. In addition, the combined dried beet showed the highest rehydration ratio and antioxidant activity. Taken together, our results indicate that an appropriate combination of hot air and infrared radiation is suitable to produce high-quality dried beet.

열처리 및 해동방법에 따른 냉동 감자와 당근의 품질 변화

임지현(Ji-Hyun Im),남정현(Jung-Hyun Nam),고아라(A-Ra Ko),진희정(Hee-Jung Jin),김두리(Duri Kim),김창숙(Chang-Sook Kim),천지연(Ji-Yeon Chun) 한국식품영양과학회 2022 한국식품영양과학회지 Vol.51 No.6

본 연구에서는 냉동 감자와 당근의 전처리 및 해동 방법에 따른 변화를 관찰하기 위해 hot water blanching 및 steam blanching 처리한 것과 전처리하지 않은 대조구를 개별 급속냉동 하였고, 이후 상온해동, 유수해동, 전자레인지 해동을 진행하여 이화학적, 물리적, 영양학적 변화를 분석하였다. 해동속도는 상온해동, 유수해동, 전자레인지 해동 순으로 빨라졌으며, 전자레인지 해동 방법이 약 24~70배 정도 빠르게 해동되었다. Blanching 처리구의 경우 낮은 해동감량을 나타내었으며 이에 따라 수분함량이 증가하는 경향을 나타내었다. 감자의 색도는 가열 전처리하였을 때 대조구에 비하여 L<SUP>*</SUP>값과 a<SUP>*</SUP> 값이 유의적으로 차이를 나타내어 blanching 처리가 감자의 갈변현상을 억제하는 것으로 판단된다. 조직감은 전처리의 영향을 받아 blanching 처리를 함에 따라 조직이 연화되어 경도가 감소하는 경향을 나타내었다. pH와 총 페놀 함량은 전처리와 해동 공정에 따른 유의적 차이가 나타나지 않았다. DPPH 라디칼 소거능과 비타민 C함량은 steam blanching 처리했을 때 모든 해동 방법에서 높은 수치를 나타냈기 때문에 해동 후 감자와 당근의 항산화 효과를 높게 유지하기 위해서는 steam blanching 처리가 적절할 것으로 판단된다. 이상의 결과를 종합했을 때 감자와 당근의 해동 후 품질 변화는 해동 방법보다 blanching 처리에 따른 것으로 추측되며, 냉동 전 blanching 처리는 해동 시 발생하는 품질 변화를 억제할 수 있고, 특히 steam blanching 처리 후 유수해동 하는 것이 영양성분을 높게 유지해 주는 것으로 판단된다. This study investigates the effects of various blanching methods (hot water blanching (HB) or steam blanching (SB)) and thawing methods (room temperature thawing (RT), running water thawing (WT), and microwave thawing (MT)) on the quality attributes of frozen potatoes and carrots. Blanched potatoes and carrots were frozen using individual quick freezing (−35℃), followed by applying various thawing methods. We observed increased thawing speed in the order of RT, WT, and MT. The MT method was about 24 to 70 times shorter than the other methods. The thawing losses were influenced by the blanching methods which affect the drip loss and moisture contents of potatoes and carrots. The blanching process reduced the browning of potatoes but did not affect color of the carrots. No change was obtained in the pH value when considering different blanching or thawing methods. The hardness of potatoes and carrots tended to be lowered by blanching treatment. SB treated potatoes and carrots had high DPPH radical scavenging ability and vitamin C content. Especially, the WT treated potatoes and carrots had the highest total polyphenol content. Our results confirmed that SB is an excellent pre-treatment for potatoes and carrots from the nutritional aspect, and blanching pre-treatment before the freezing process could suppress the quality changes that occur during the thawing processes. Furthermore, we propose that RT after SB treatment for potatoes and carrots is probably the most suitable method to maintain their nutritional quality.

시각장애학교에서 음악교과를 가르치는 교사의 수업 전문성 탐구 과정에 대한 자문화기술지

고아라(Ko A Ra),홍재영(Hong Jae Young) 한국시각장애교육재활학회 2021 시각장애연구 Vol.37 No.3

연구 목적: 이 연구는 시각장애학교에서 음악을 가르치는 교사가 겪은 경험을 면밀히 살펴보고, 이러한 경험을 통해 수업전문성을 탐구해가는 과정을 알아보는 데 목적이 있다. 연구 방법: 연구 목적 달성을 위해 자문화기술지 방법을 활용하였다. 연구 결과: 첫째, 연구자로서의 나는 음악수업 전문성의 부족과 특수교사로서의 전문성 부족을 마주했다. 둘째, 연구자로서의 나는 음악수업 전문성 향상을 위해 음악적 기능과 지식을 함양시켜 나갔으며 음악수업을 통해 실천적 지식을 축적해나갔다. 또한 반성적 사고를 행하며 수업의 질을 개선해나갔으며 사회적 지지 속에서 수업 전문성 계발을 지속하고 보다 다양한 수업을 시도하기 위한 토대를 마련할 수 있었다. 결론: 이러한 연구를 통하여 시각장애학교에서 음악 교과를 가르치는 교사의 수업 전문성 함양 및 시각장애학교 음악수업의 질 개선에 대한 시사점을 도출할 수 있었다. 이 연구의 결과는 향후 시각장애학교 음악수업의 질 개선에 필요한 기초 정보를 제공하는 데 기여할 수 있을 것이다. Purpose: This study closely examines the experience of teaching a music class at a school for the visually impaired and investigates the process of nurturing the expertise practical knowledge through such an experience by using autoethnography. Method: The autoethnography research method was used in order to achieve the research objective. Results: First, I was faced a lack of expertise on music classes and a lack of expertise as a special teacher. Second, I was developed musical skills and knowledge to improve my expertise in music classes and accumulated practical knowledge through music classes. It also improved the quality of the class through reflective thinking and was able to continue to develop class expertise under social support and lay the foundation to try more diverse classes. Conclusion: Through this research, I was able to draw implications on nurturing the expertise of music teachers and improving the quality of music classes at a school for the visually impaired. The research findings are expected to provide the preliminary data necessary to enhance the quality of music classes at a school for the visually impaired.

Mayer-Rokitansky-Kuster-Hauser syndrome 환자에서 발병된 난소암

김성주 ( Sung Joo Kim ),김지현 ( Ji Hyun KIM ),박영한 ( Young Han Park ),강정배 ( Jung Bae Kang ),임채춘 ( Chae Chun Rhim ),전영은 ( Young Eun Jeon ),고아라 ( A Ra Ko ),박수예 ( Sue Ye Park ) 대한산부인과학회 2012 Obstetrics & Gynecology Science Vol.55 No.12

Vaginal aplasia is an unusual congenital anomaly of the genital tract with an incidence of 1 in 4,000 female births. The vast majority of the cases are part of Mayer-Rokitansky-Kuster-Hauser syndrome (MRKHs). In this syndrome, while the vagina is absent and the uterus is missing or extremely rudimentary, the ovarian function is normal and the secondary sexual characteristics are normally developed. The aim of the study is to present a case of ovarian cancer that developed on the ovary of a woman with MRKH syndrome.

A Case of Spinal Cord Cavernoma Mimicking Transverse Myelitis

김영아(Young-A Kim)ㆍ정민희(Min-Hee Jeong)ㆍ이은혜(Eun Hye Lee)ㆍ염미선(Mi-Sun Yum)ㆍ나영신(Young-Shin Ra)ㆍ고태성(Tae-Sung Ko) 대한소아신경학회 2010 대한소아신경학회지 Vol.18 No.1

척수의 해면 혈관종은 척수에서 생기는 드문 병변이며 소아에서 특히 드물다. 저자들은 하지의 근력저하와 감각소실, 배뇨장애를 호소한 14세 여아로 급성 횡단성 척수염으로 치료 받은 후 호전되었으나, 11개월 후 증상 재발하여 시행한 자기공명영상 소견상 척수의 해면 혈관종으로 진단받고 수술적제거를 받은 후 신경학적 증상의 호전을 보인 1례를보고하는 바이다. 소아에서 급성 사지 마비 증세를보일 경우, 드물지만 감별진단으로 척수의 해면 혈관종 또한 고려해 보아야 할 것으로 생각된다. A 14-year-old girl presented with recurrent, progressive lower leg weakness and decrease in sensation. When the symptoms first appeared, she was misdiagnosed as transverse myelitis and was treated with methylprednisolone. Eleven months later, when she had the same symptoms, spine magnetic resonance images showed the characteristic findings of spinal cord cavernoma and she underwent surgical intervention. Spinal cord cavernomas are rare lesions. Because of their highly bleeding tendency, acute neurological deterioration occurs secondary to hemorrhage within the spinal cord. In order to prevent intramedullary hemorrhage and to halt the progressive neurological decline, surgical resection is recommended. We experienced a case of spinal cord cavernoma presenting with recurrent transverse myelitis clinically.

Film Session Q&A 1 : 04 ; Laparoscopic Radical Cervicectomy with Pelvic Lymphadenectomy

( A Ra Koh ),( Kyung Tai Kim ),( Jaeman Bae ),( Won Moo Lee ),( Unsuk Jung ),( Jung Hwa Ko ),( Joong Sub Choi ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-

목적: Present an unusual case 방법: A 73-year-old Korean woman, 3-0-3-3, was transferred to our department because vaginal bleeding for three months.. In 25 years ago, she underwent subtotal hysterectomy with BSO due to myoma, in other hospital. The MRI showed that tumor size was more than 4 point 5 centimeter and there was no sign of lymphadenopathy. The level of SCC and CEA were increased.She underwent laparoscopic radical cervicectomy wih pelvic lymphadenectmy. I performed parametrial dissection and ureterolysis after systemic pelvic lymphadenectomy. I started dissecting the ureter up to the crossing with the uterine artery. Then the anterior parametrium was entered by blunt dissection working on the ureter. It was easier to unroof the ureter following its course into the anterior parametrium, woking directly on its adventitial sheath along its lateral and superior aspect. 결과: There were no intra-and postoperative complications. The final histopathologic report showed squamous cell carcinoma. She is receiving adjuvant chemotherapy and radiation after surgery. 결론: When we perform laparoscopic radical cervicectomy, unroofing the ureter following its course into the anterior parametrium is easier and feasible, woking directly on its adventitial sheath along its lateral and superior aspect.

Film Session Q&A 2 : Laparoscopic Restaging Surgery for woman with Unexpected Ovarian Malignancy

( Jae Man Bae ),( Kyung Tai Kim ),( Won Moo Lee ),( Jung Hwa Ko ),( A Ra Koh ),( Un Suk Jung ),( Joong Sub Choi ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-

A 39-year-old Korean woman with prior laparoscopic left salpingo-oophorecetomy, presented with unexpected ovarian malignancy which was resulted from the ruptured clear cell carcinoma from the left ovary during her surgery. She is self-employed and did not want a laparotomic restaging surgery to slow her down. We performed laparoscopic restaging surgery including peritoneal washing cytology, LAVH with RSO, laparoscopic pelvic lymphadenectomy, laparoscopic para-aortic lymphadenectomy, omentectomy, appendectomy, and multiple peritoneal biopsies. The final diagnosis was FIGO stage IC of clear cell carcinoma from the left ovary, and then she had four cycles of adjuvant chemotherapy.

패션 브랜드의 SNS 마케팅에 관한 연구 - 기술 수용 모델을 중심으로 -

고아라 ( A Ra Ko ),김선희 ( Sun Hee Kim ) 복식문화학회 2014 服飾文化硏究 Vol.22 No.6

The purpose of this study is to analyze the factors that lead to continuous use intention of SNS marketing. The research model was designed to investigate the SNS factors that affect use intention based on TAM (Technology Acceptance Model) suggested by Davis (1986). The survey focused on age twenties to thirties male and female who had experience in receiving fashion brands message through Facebook. 329 questionnaires were used to analyze the results of study, and SPSS 12.0 was used to conduct factor analysis, reliability analysis, and multiple regression analysis. The results of this research are as follows. First, interaction/playfulness, information, reliability, and convenience of access were extracted as the characteristics of fashion brands SNS marketing. Second, all SNS factors had significant relation on perceived usefulness. But only interaction/playfulness and convenience of access showed significant relation on perceived ease of use. Third, perceived usefulness and perceived ease of use affected continuous use intention. Forth, continuous use intention had significant relation on brand attitude and showed direct and indirect significant relation to purchase intention.

Template-free synthesis and characterization of mesoporous tungsten nitride nanoplates

Ko, A-Ra,Han, Sang-Beom,Lee, Young-Woo,Park, Kyung-Won Royal Society of Chemistry 2011 Physical chemistry chemical physics Vol.13 No.28

<P>We report well-defined mesoporous β-W<SUB>2</SUB>N nanoplates prepared by using layered WO<SUB>3</SUB>·H<SUB>2</SUB>O without templates. The tungsten nitride nanoplates exhibit typical mesoporous structures with size-controlled monomodal pore distributions.</P> <P>Graphic Abstract</P><P>The mesoporous tungsten nitrides with tunable pore sizes are prepared by template-free synthesis using layered tungsten oxides as a function of reaction time. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cp20711c'> </P>