Quality Characteristics of Paste (Anggeum) Added with Peach Puree by Storage Period

Ha-Na Ra,Ga-Yeong Park,Kyung-Mi Kim,Yong-Sik Cho,Ha-Yun Kim 한국식품영양과학회 2018 한국식품영양과학회 학술대회발표집 Vol.2018 No.10

Molecular Mechanisms of Neurologic Disorders(Neurobiology) : The essential role of p53 in TPEN-induced apoptosis

( Ha Na Ra ),( Yang Hee Kim ) 한국생화학분자생물학회 (구 한국생화학회) 2008 생화학분자생물학회 춘계학술발표논문집 Vol.2008 No.-

Improvement of the stability of hydroxyapatite through glass ceramic reinforcement.

Ha, Na Ra,Yang, Zheng Xun,Hwang, Kyu Hong,Kim, Tae Suk,Lee, Jong Kook American Scientific Publishers 2010 Journal of nanoscience and nanotechnology Vol.10 No.5

<P>Hydroxyapatite has achieved significant application in orthopedic and dental implants due to its excellent biocompatibility. Sintered hydroxyapatites showed significant dissolution, however, after their immersion in water or simulated body fluid (SBF). This grain boundary dissolution, even in pure hydroxyapatites, resulted in grain separation at the surfaces, and finally, in fracture. In this study, hydroxyapatite ceramics containing apatite-wollastonite (AW) or calcium silicate (SG) glass ceramics as additives were prepared to prevent the dissolution. AW and SG glass ceramics were added at 0-7 wt% and powder-compacted uniaxially followed by firing at moisture conditions. The glass phase was incorporated into the hydroxyapatite to act as a sintering aid, followed by crystallization, to improve the mechanical properties without reducing the biocompatibility. As seen in the results of the dissolution test, a significant amount of damage was reduced even after more than 14 days. TEM and SEM showed no decomposition of HA to the secondary phase, and the fracture toughness increased, becoming even higher than that of the commercial hydroxyapatite.</P>

관상어 사육에 있어서 pH 조절 및 인산염 제거를 위한 꼬막과 굴 패각의 활용

서하나 ( Ha-na Seo ),이지나 ( Ji-na Lee ),공병욱 ( Byeong-wook Kong ),이영식 ( Young-sik Lee ),라덕관 ( Deog-gwan Ra ),정정조 ( Cheongjo Cheong ) 한국환경기술학회 2018 한국환경기술학회지 Vol.19 No.5

본 연구는 관상어 사육에 있어 꼬막과 굴 패각을 이용한 pH 조절 및 인산염 제거재로서의 활용방안 모색을 목적으로 하였다. XRD 분석결과 비소성 패각에서는 탄산칼슘(CaCO₃)이, 800 ℃ 이상 소성 시에는 산화칼슘(CaO)이 주성분을 이루는 것으로 나타났다. Jar-test를 통한 pH 변화는 주입량이 많을 수록 초기 상승률이 높았으며, 48시간 경과 후 패각 종류와 관계없이 pH 8로 유지되는 것으로 나타났다. 100 L 수조 내에서 pH 변화는 Jar-test 실험과 유사한 경향을 보였다. 패각의 인산염 제거율은 꼬막 패각 4 kg 주입 시 4일 경과 후 제거가 시작되어 15일 후 86.1 %의 제거율을 보였으며, 굴 패각 4 kg 주입 시 3일 경과 후 제거가 시작되어 15일 후 80.6 %의 제거율을 보였다. 꼬막과 굴 패각은 양어장에서 pH 조절과 인산염 제거에 효율적인 수처리재로 활용이 가능할 것으로 판단된다. The purpose of this study is to utilize the ark shell and oyster shell as a pH control and phosphate removal in aquaculture of ornamental fish. XRD analysis showed that carbonate (CaCO₃) was the main component in non-calcinated shell, and calcium oxide(CaO) was the main component in calcinating at 800 ℃ or more. The pH change by jar-test was higher at greater doses and maintained at pH 8 regardless of shell type after 48 hours. The pH change in the 100 L tank was similar to the jar-test experiment. The phosphate removal was started 4 days later and the removal rate was 86.1 % after 15 days when 4 kg of ark shell was injected. When 4 kg of oyster shell was injected, phosphate removal was started 3 days and the removal rate was 80.6 % after 15 days. It is expected to be utilized to pH control and phosphate removal in fish farm using the ark shell and oyster shell.

Quality Characteristics of Tteokbokki Tteok Varying Packing Unit by Heat Treatment

Sa Ra Park,Ok lan Sung,Ha Na Ra,Kyung Mi Kim,Yong Sik Cho,Ha Yun Kim 한국식품영양과학회 2018 한국식품영양과학회 학술대회발표집 Vol.2018 No.10

배호흡운동과 가슴우리팽창운동이 돌림근띠 손상환자의 머리위치 및 어깨자세에 미치는 영향

하나라 ( Na-ra Ha ),신형민 ( Hyeong-min Shin ),김명철 ( Myung-chul Kim ),오현주 ( Hyeon-ju Oh ) 대한물리의학회 2016 대한물리의학회지 Vol.11 No.4

PURPOSE: The aim of this study was to examine the effects of abdominal breathing and thoracic expansion exercises on craniovertebral and cranial rotation angles in patients with rotator cuff injury. METHODS: This study enrolled 19 patients with rotator cuff injury, and ten and nine of the patients were randomly placed in abdominal breathing and thoracic expansion exercise groups, respectively. After pain treatment in each group, breathing exercise was conducted thrice a week for four weeks. The patients were recorded by using a digital camera and Image J (version 1.46, National Institutes of Health, USA), an angle measurement program, was used to analyze changes in the craniovertebral angle, cranial rotation angle, and sagittal shoulder posture. RESULTS: Statistically significant differences in the craniovertebral angle were found in both the abdominal breathing and thoracic expansion exercise groups (p<.05). A significant difference in cranial rotation angle was found in the thoracic expansion exercise group only (p<.05). No statistically significant differences in sagittal shoulder posture were found in both groups (p>.05). CONCLUSION: Although abdominal breathing and thoracic expansion exercises did not effectively change sagittal shoulder posture, the exercises were effective in improving craniovertebral and cranial rotation angles. Therefore, abdominal breathing and thoracic expansion exercises are suggested as effective exercise programs for forward head posture.

발아기간에 따른 단메밀과 쓴메밀의 항산화 성분 및 활성의 변화

라하나 ( Ha-na Ra ),강문경 ( Moon-kyung Kang ),유광연 ( Gwang-yeon You ),김진숙 ( Jin-sook Kim ),김기창 ( Gi-chang Kim ),최송이 ( Song-yi Choi ),김경미 ( Kyung-mi Kim ) 한국식품조리과학회(구 한국조리과학회) 2021 한국식품조리과학회지 Vol.37 No.1

Purpose: This study aimed to investigate the composition and biological activities of common and tartary buckwheat during germination, and to compare them. Methods: The effect of the germination time on vitamin C, γ-amino butyric acid (GABA), rutin and quercetin, total polyphenol and flavonoid contents were determined. Results: The vitamin C content reached a maximum on the fifth germination day. As the time of germination increased, the GABA content of the tartary and common buckwheat increased from 2.49 μ g/100 g and 9.59 μg/100 g to 25.17 μg/100 g and 57.84 μg/100 g, respectively. D-chiro-inositol (DCI) is a bioactive compound that serves as a mediator of insulin action. DCI in common and tartary buckwheat was found to be 129.65, 76.31 mg/100 g, respectively, with a significant increase in the DCI content as germination progressed. During germination, the total polyphenol and flavonoid contents tended to increase as germination time increased. The ABTS and DPPH radical scavenging activities in germinated samples increased with germination time and were caused by an increase in their anti-oxidative activities. Moreover, the results showed that the vitamin C and GABA content of the common buckwheat samples were higher than those of the tartary buckwheat samples with the changing trends of total polyphenols and flavonoids opposite to each other. Conclusion: It may be concluded that germinated buckwheat can find a unique use as a natural health product due to the presence of bioactive compounds with health benefits.

발효강황가루 첨가 수준이 카레소스의 항산화 및 관능적 특성에 미치는 효과

라하나(Ha Na Ra),변양수(Yang Soo Byeon),박지현(Ji Hyun Park),김혜영(Hae Young Kim) 한국식품과학회 2017 한국식품과학회지 Vol.49 No.3

본 연구에서는 기존의 레토르트 포장형 간편가정식용 카레소스의 커리가루 함량보다 일반강황 및 발효강황 가루의 첨가량을 각각 1%와 2% 강화시킨 간편가정식용 건강지향적 카레소스를 개발하여 항산화 및 관능적 특성을 분석하였다. 일반강황가루와 발효강황가루 첨가량이 강화된 카레소스의 색도 측정 결과, 명도 L값은 발효강황가루를 첨가한 시료군이 일반강황가루를 첨가한 시료군보다 유의적으로 어두운 것으로 측정되었으나(p<0.05), 대조군에 비해 실험군의 L값이 유의적으로 높아지는 결과를 보였다(p<0.05). 카레소스의 pH는 대조군이 5.93의 값으로 유의적으로 가장 높은 결과를 보였으며, 발효강황가루를 첨가한 시료군이 일반강황가루를 첨가한 시료군보다 유의적으로 낮은 pH를 나타내었다(p<0.05). 카레밥의 경도는 발효강황 2% 첨가군인 FC2가 42.67의 값으로 대조군 52.00와 비교하여 유의적으로 낮은 결과를 보였으며(p<0.05), FC1은 대조군의 경도에 비해 다소 낮아지는 결과를 보였으나 유의차는 없었다. 총 페놀함량 측정 결과, 일반강황 및 발효강황가루를 첨가한 시료군이 대조군에 비해 유의적으로 높은 결과를 보였으며(p<0.05), 발효강황가루 첨가 시료군이 일반강황가루 첨가 시료보다 유의적으로 높은 함량을 나타내었다(p<0.05). 관능적 특성강도 분석결과, 카레밥 고유의 맛은 발효강황 강화 시료군이 대조군에 비해 유의적으로 높게 평가 되었다(p<0.05). 매운맛과 쓴맛은 대조군과 비교하여 발효강황을 첨가한 FC1, FC2시료군이 유의차를 보이지 않았거나 더 약하게 평가되었다(p<0.05). 소비자 기호도 검사 결과, 발효강황 1% 강화 시료인 FC1의 카레 고유의 맛, 매운맛, 쓴맛 및 전반적 기호도 등은 대조군과 유의차를 보이지 않은 반면에 FC2는 대조군에 비해 유의차가 없거나 유의차는 있으나 약간 낮게 평가 되었다(p<0.05). 이와 같이 항균, 항염, 항암 등의 활성을 나타내는 강황을 이용하여 카레 고유의 맛은 지키면서도 매운맛 및 쓴맛을 개선할 수 있도록 발효하여 제조한 발효강황가루의 함량이 강화된 카레소스는 기존의 카레소스에 비해 항산화 활성이 높고, 소비자기호도가 떨어지지 않는 것으로 조사되었다. 특히 발효강황가루 첨가량이 기존 커리가루 대비 1% 증가된 FC1의 경우, 관능적 특성강도 및 기호도 검사 결과에서 대조군 카레소스와 유의차를 보이지 않아 발효공정을 이용한 간편가정식용 가공식품의 관능적, 항산화적 품질 개선 및 제품의 고품질화를 통한 고부가가치화가 가능할 것으로 생각된다. The aim of this study was to determine quality characteristics of the curry sauce fortified using Curcuma aromatica Salisb. powder with and without fermentation. Here, the sensory, physicochemical, and antioxidant activity characteristics of the fortified curry sauces were measured. The L, b values of the samples containing the fermented C. aromatica Salisb. were significantly higher than those of the control (p<0.05). The total phenol content of the experimental groups was significantly higher than that of the control (p<0.05). There were no significant differences between the control and the sample fortified with fermented C. aromatica Salisb. (FC1) in the acceptance attributes of curry, spiciness and bitterness. Furthermore, the overall acceptance was similar enough to show no differences between the control and FC1. Thus, we can conclude that the curry sauce fortified using the fermented C. aromatica Salisb. by 1% was successfully developed in the competitive HMR market to promote antioxidant activity without decreasing the sensory characteristics.

연구논문 : 간편가정식용 민들레복합추출물 (AF-343) 첨가 선식의 품질특성 및 미생물적 안전성

라하나 ( Ha Na Ra ),김혜영 ( Hae Young Kim ) 한국식품조리과학회(구 한국조리과학회) 2014 한국식품조리과학회지 Vol.30 No.5

We investigated the antioxidant and physicochemical qualities as well as the sensory characteristics, and microbial safety of sunsik containing varied amounts of AF-343, which can help add moisture to the skin and relieve the symptoms of atopic dermatitis. Samples did not show significant differences in pH measurements, but the pH had a tendency to increase with tendencies as increased amounts of AF-343. The total phenolic compound contents and DPPH radical scavenging activity, indicators of biologically active ingredients such as antioxidant, anticancer and antibacterial activity, significantly increased as the amounts of AF-343 increased(p<0.05). In an acceptance test, the samples did not show significant differences, however samples with the 750 mg AF-343 received the highest scores out of all the samples in overall acceptance. All samples were confirmed as microbially safe according to the food code applied to food manufacturers. Aerobic plate counts of the control group were 1.60 log CFU / g, while those of samples with 750 mg AF-343 were 1.70 log CFU / g. E. coli. Pathogenic microorganisms tests were either negative or not detected in all samples.

Improved performance of flexible perovskite light-emitting diodes with modified PEDOT:PSS hole transport layer

Haesook Kim,Ha Na Ra,Ji Sun Kim,Sang-Hyon Paek,Jongwook Park,Young Chul Kim 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.90 No.-

We demonstrated the improved device performance offlexible perovskite light-emitting diodes (PeLEDs)on indium-tin oxide coated poly(ethylene terephthalate) (ITO/PET) substrates by using modified poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as a hole transport layer (HTL). Solvent modification and dopant modification of the PEDOT:PSS solution were carried out by addingisopropyl alcohol (IPA) and poly(sodium 4-styrenesulfonate) (PSS-Na), respectively, to the pristinesolution. Devices with the modified HTLs, PEDOT:PSS + IPA and PEDOT:PSS + PSS-Na, exhibited asignificant enhancement in both luminance and efficiency. The work function of HTL was improved toreduce the energy barrier against the perovskite layer and facilitate hole transport. The perovskitefilmsdeposited on the modified PEDOT:PSS layers showed a uniformly covered surface morphology withoutany defects, resulting in an increased PL intensity. In particular, the perovskitefilm coated on the dopantmodified HTL showed a better crystallinity and reduced luminescence quenching. The PeLED device withthe PEDOT:PSS + PSS-Na HTL exhibited a maximum luminance of 3900 cd/m2, a maximum currentefficiency of 25.1 cd/A, and a maximum external quantum efficiency of 5.9%.