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Hee-Beom Yang*,Han-Byol Song*,Ji-Won Han,Joong Kee Youn,Dayoung Ko,Young Jin Ryu,Ji Young Kim,Hyun-Young Kim 대한외과학회 2023 Annals of Surgical Treatment and Research(ASRT) Vol.104 No.1
Purpose: Appendectomy is one of the most common surgeries in children. Although various radiological examinations are performed, they do not always reveal a definitive diagnosis of appendicitis. This study aimed to investigate the clinical course of equivocal appendicitis, identify the factors associated with appendectomy, and suggest appropriate management for these patients. Methods: Patients younger than 19 years who visited Seoul National University Bundang Hospital with a differential diagnosis of appendicitis from January 2013 to December 2017 were included. All participants conducted ‘appendiceal CT’ with a scoring scale of 1–5. The higher the score, the higher the likelihood of a radiologic diagnosis of appendicitis. We defined the appendicitis CT score of 2–4 as equivocal appendicitis (n = 143). Medical records were reviewed retrospectively for demographics, further examination as abdominal ultrasonography, and appendectomy status (yes or no). The mean follow-up period was 15.6 ± 71 days. Results: Equivocal appendicitis accounted for 16.7%. Additional ultrasonography test was performed in 24.5% (35 of 143). In total, 34 patients (23.8%) underwent appendectomy. Among the patients with appendiceal CT scores 2, 3, and 4, 4.9%, 50.0%, and 87.5% underwent appendectomy, respectively. Higher WBC count, higher appendicitis CT score, and readmission were significantly associated with appendectomy in patients with equivocal appendicitis. Conclusion: Higher appendicitis CT score and WBC level were positively associated with appendectomy. Careful observation can be a treatment option in appendicitis CT score 2 or 3 groups. Appendectomy is the first-line treatment for patients with appendicitis score 4. Additional ultrasonography test is advisable to determine treatment modality for equivocal appendicitis.
양희범(Hee-Beom Yang),이성철(Seong-Cheol Lee),김세림(Se-Lim Kim),이민석(Min-Suk Lee),이진호(Jin-Ho Lee),김태춘(Tae-Choon Kim),김영걸(Young-Gul Kim),송관정(Kwan-Jeong Song) 한국차학회 2008 한국차학회지 Vol.14 No.2
차에서 효율적인 교배육종 시스템을 확립코자 몇 가지 교배조합에서의 연차 간 결실율과 종자 형성율을 평가하였다. 10% 자당, 2% 한천, pH 5.6의 화분 발아 배지에서의 화분 발아 검정은 인공교배에 이용한 화분의 활력이 정상적이었음을 나타냈다. 인공교배 3일 후 이내에 화분관은 화주를 통해 자방의 상단을 침입하는 것으로 나타났다. 교배조합에 따른 결실율은 3.7~57.7%, 열매 당 종자 수는 1.4~3.0 개 내외를 나타냈다. 연차 간 변이에 있어서 열매 당 종자 수의 변이는 미미했고, 결실율의 변이는 다소 크게 나타났다. 자방은 3개의 심실로 구성되고 심실 당 4개의 배주가 위치하여 총 12개 배주가 형성됨을 확인하였다. Aiming to establish an efficient conventional breeding system in tea (Camellia sinensis), fruit set and seed formation with seasonal variation were evaluated at some cross combinations. The pollen germination test was conducted on a medium consisting of 10% sucrose, 2% agar, pH 5.6 and the result indicated that pollens used in artificial pollination had normal germination activity. Pollen tubes penetrated through style into ovary within 3 days after artificial pollination. Fruit set was ranged at 3.7~57.7% and average number of seeds per fruit was varied at 1.4~3.0. Amount of variation was little at average number of seeds per fruit, but much high at fruit set. Morphological analysis determined that one ovary had three carpels and 12 ovules, including 4 ovules a one carpel, respectively.
차 종자 저장 및 파종 처리가 종자의 발아에 미치는 영향
양희범(Hee-Beom Yang),이성철(Seong-Cheol Lee),김세림(Se-Lim Kim),이민석(Min-Suk Lee),이진호(Jin-Ho Lee),김영걸(Young-Gul Kim),송관정(Kwan-Jeong Song) 한국차학회 2008 한국차학회지 Vol.14 No.2
본 연구는 차나무 교배육종 기술체계를 확립할 목적으로 차나무 교배 실생의 획득률을 높일 수 있는 기초 자료를 얻고자 수행하였으며, 차나무에서 채종된 종자의 발아온도, 저온처리 기간, 종피 처리, 침윤 기간, 저장 방법 등 몇 가지 요인이 차 종자 발아에 미치는 영향을 분석하였다. 발아온도는 Saemidori, Topyung 및 Okumidori 3품종 모두 25℃에서 발아율이 가장 높게 나타났다. 그리고 저온처리의 영향은 Saemidori와 Okumidori 두 품종 종자 모두 저온처리 기간 50일, 63일, 75일이 38일보다 발아율과 발아속도가 높게 나타났다. 자연 건조된 Topyung 종자의 경우 종피 제거처리가 발아율이 64%로 종피 부분적 파쇄와 무 처리구보다 훨씬 높았고 Saemidori 종자의 종피 제거 처리구의 최종 발아율은 83.3%로 무 처리구의 47.5%보다 높게 나타났다. 침윤 처리 실험에서 Yabukita 종자의 최종 발아율은 침윤 2, 3, 4일 후 파종된 종자가 높았고 Okumidori 종자는 침지 3, 4일 후 파종된 종자가 높았다. 종자 보관 방법에 있어서 Yabukita 종자는 습윤 보관이 건조 보관한 종자보다 발아율이 높았고 Topyung, Okumidori 종자는 두 처리구들 간에 차이가 없었다. 발아속도는 3품종의 종자에서 모두 습윤 보관의 경우 높게 나타났고 종자 생체중이 증가되었다. The study was conducted to obtain fundamental data related to efficient increase of the seedling population aiming to establish an efficient cross breeding system for tea plants. Several parameters affecting seed germination, such as germination temperature, chilling duration, seed coat treatment, imbibition duration, and storage method, were evaluated. Of germination temperature, the highest germination percentages were obtained at 25℃ for all three varieties of Saemidori, Topyung, and Okumidori. Chilling duration of 50, 63, and 75 days had higher germination percentages and speeds of germination than those of 38 days in both varieties of Saemidori and Okumidori. Final germination percentage by seed coat removal in Topyung dried naturally showed 64 %, much higher than those by partial seed coat crack and control, and that for Saemidori, 83.3%, higher than 47.5% for control. Imbibition duration of 2, 3, and 4 days in Yabukita and those of 3 and 4 days in Okumidori showed higher germination percentages than the others. Wetness of seed storage method indicated higher germination percentage than dryness in Yabukita, however there were no differences in germination percentages of Topyung and Okumidori by storage method. On the other hand, speed of germination was higher at wetness for all three varieties in accordance with increase of seed fresh weight.
Tae-Yang Noh,Beom-Hee Lee,Byeong-Mok Park1,Ah-Ran Cha,Hee-Chul Yang 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2
Nuclear power plants in Korea stores approximately 3,800 drums of paraffin solidification products. Due to the lack of homogeneity, these solidification products are not allowed to be disposed of. There is therefore a need for the separation of paraffin from the solidification products. This work developed an equipment for a selective separation of paraffin from the solidification product using the vacuum evaporation and condensational recovery method in a closed system. The equipment mainly consists of a vacuum evaporator and a condensational deposition recovery chamber. Nonisothermal vacuum TGAs, kinetic analyses and kinetic predictions were conducted to set appropriate operation conditions. Its basic operability under the established conditions was first confirmed using pure paraffin solid. Simulated paraffin solidification product fixing dried boric acid waste including nonradioactive Co and Cs were then fabricated and tested for the capability of selective separation of paraffin from the simulated waste. Paraffin was selectively separated without entertainment of Co and Cs. It was confirmed that the developed equipment could separate and recover paraffin in the form of nonradioactive waste.