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Quantitative analysis of capsaicinoids in Capsicum annuum using HPLC/UV
Gia Han Tran,Hyejin Cho,Chohee Kim,Ohyeol Kweon,Jun Yeon Park,Sullim Lee,Sanghyun Lee 한국응용생명화학회 2023 Journal of Applied Biological Chemistry (J. Appl. Vol.66 No.-
Capsicum annuum belongs to the Solanaceae family, crops of which are extensively cultivated worldwide. It is a food source containing various nutrients and vitamins and also serves as a medicine for treating ailments. The burning feeling experienced while consuming Capsicum fruits is due to the presence of capsaicinoids, particularly capsaicin and dihydrocapsaicin. This study aimed to assess the content of these two compounds in 34 varieties of capsicum and paprika. High-performance liquid chromatography with a gradient elution system and a reversephase YMC Pack-Pro column with UV detection at 280 nm was employed. The results revealed that, among the 34 samples, only six samples (samples 1, 15, 20, 29, 32, and 34) contained capsaicin and dihydrocapsaicin, and their highest contents were found in sample 1 - variety name: Sungil-c (capsaicin: 3.42 mg/g extract, dihydrocapsaicin: 1.20 mg/g extract). These findings suggest that the content of these two compounds is attributed to the variety and is influenced by geographical location and environmental factors. Additionally, this study provides a basis for establishing a C. annuum variety with high capsaicin and dihydrocapsaicin contents.
Gia Ann,Ye eun Park,Ji Yeon Park,Dongwhan Kim 한국HCI학회 2024 한국HCI학회 학술대회 Vol.2024 No.1
This study explores the potential of AI chatbots in streamlining the reporting of malicious comments, addressing the challenges posed by the existing online sue system of the Korean National Police Agency. Employing a Wizard of Oz method, participants conducted two experimental tasks, comparing their experiences with human agents and AI chatbots in the context of cyber defamation reporting. Participants were asked to assume the role of YouTubers and respond to simulated malicious comments, with subsequent surveys and interviews assessing their perceptions of fairness, trust, and emotional impact. The results revealed a preference for AI chatbots, which were perceived as fairer and more trustworthy from objectivity. However, the need for enhancing chatbots conversational capabilities and providing more comprehensive responses and legal information was raised. Our findings suggest that integrating AI chatbots could potentially reduce the stress and complexity of the reporting process, encouraging user engagement and improving overall system efficiency.
Gia Ginelle Carandang,김경진 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.12
The inert purge gas plays an important role in mass manufacturing of optical fibers, as it is usually the mixture gas of helium and argon. The natural and forced convective effects of purge gas are numerically investigated through the process simulation of glass fiber drawing in a short draw tower furnace by employing an iterative computational scheme of neck-down prediction formulation and computational fluid dynamics simulation of purge gas flow. The furnace geometric model and process conditions are based on realistic manufacturing process. It is found that neck-down shape and draw tension are quite insensitive to change of gas flow rate and helium contents level. In contrast, the recirculatory flow pattern around preform neck-down region is observed when helium contents are low, suggesting the difficulty in flushing of contamination particles out of furnace system. The increase of helium contents combined with increased flow rate in purge gas mixture could completely remove such undesirable flow patterns.
Investigation of Diseases of Thai koi, Anabas testudineus (BLOCH) from Farming Conditions in Winter
Gias Uddin Ahmed(지아스 우딘 아메드),Mili Dhar(미리 드하르),Mohammed Nurul Absar Khan(모함메드 누늘 압사르 칸),Jae-Suk Choi(최재석) 한국생명과학회 2007 생명과학회지 Vol.17 No.10
방글라데시의 양식어류 생산에서 가장 큰 문제점은 어병이며, 어병을 진단하는 위해서는 병변부의 조직병리학적 진단이 필수적이다. 방글라데시의 주요 잉어과에 속하는 몇몇 어류에 대해서는 조직병리학적 연구가 진행되었지만, 고유종(indigenous species)이면서 담수 소형어류인 어종에 대해서는 거의 연구가 이루어지지 않은 상태이다. 그러므로 본 연구는 보양식으로 경제적 가치가 높은 Thai koi (Anabas testudineus)에 대한 조직병리학적 특성을 규명하고자 하였다. 2006년 8월부터 2007년 2월까지 7개월간 방글라데시 미멘싱(Mymensingh)지역의 두 양어장에서 임상학적 그리고 조직병리학적 관찰을 통해 Thai koi(A. testudineus)의 건강상태를 조사하였다. 어류개체의 홍반, 출혈, 외상, 원생동물 피낭(cyst)과 같은 비정상적 증상에 대한 임상학적 진단을 월별로 조사하였다. 동절기양어장의 수질 요인 중에서 수온, 용존산소량과 같은 변수는 어류에게 적합하지 않은 것으로 나타났다. 임상학적으로는 12월부터 1월 사이에 병에 걸린 어류가 더 많았고, 8월과 9월 사이 그리고 2월에는 외형상으로는 거의 정상에 가까웠다. 12월과 1월에 피부탈락, 피부외상, 궤양과 꼬리지느러미의 손실과 같은 여러 가지의 임상학적 증상이 나타났다. 조직병리학적 측면에서 8월과 9월 기관의 구조는 정상으로 나타났다. 10월과 11월 사이에는 미미한 병적 증상들이 발견되었고, 12월과 1월에는 조직괴사, 핵응축(pyknosis), 염증, 출혈, 이상비대(hypertrophy), 세포과형성(hyperplasia), 1·2차 새판(gill lamellae)의 손상과 같은 현저한 조직병리학적 변화가 발견되었다. 반면에 2월에는 어류의 병적증상이 점차적으로 감소하였다. 개개의 어류양식장을 고찰해 보았을 때, Relance Aqua Farm의 어류가 Sotota Mastshya Hatchery의 어류보다 더 감염률이 높았다. 본 연구 결과는, Thai koi의 월별 임상학적·조직병리학적 진단을 통해, 어병 발생 시기를 예측하고, 예방하기 위한 기초자료로 활용될 수 있다. Investigation on health conditions of Thai koi (Anabas testudineus) were carried out through clinical and histopathological observations from different farms of Mymensingh district for seven months during August 2006 to February 2007. Fish sampling and water quality parameters (temperature, dissolved oxygen and pH) were monitored on a monthly basis. Clinical examination of fishes was also carried out for any kind of abnormalities at monthly intervals. Samples of skin, muscle, gill, liver and kidney were observed by histological technique. Among the water quality parameters the values of water temperature, dissolved oxygen were found to be at unfavorable level for fish during the colder months in the farms. Clinically it was observed that fishes were more affected from December to January and almost normal in appearance during August to September and February. Different clinical symptoms like scale loss, dermal lesion, ulcer and loss of caudal fin were noticed in December and January. In histopathological study, structures of fish organs were normal from August to September. In the months of October and November, minor pathologies were found to be started. Marked pathological changes like necrosis, pyknosis, inflammation, hemorrhage, hypertrophy, hyperplasia, missing of primary and secondary gill lamellae were observed in the months of December and January. Whereas, in the month of February the pathological condition of fish gradually reduced. Again when considered individual fish farm, fishes of Reliance Aqua Farm were more affected than Sotota Matshya Hatchery. The study showed that severity of clinical and pathological changes were increased in December and January. During the period EUS and protozoan diseases were noticed in A. testudineus of the investigated farms.