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열처리 및 초고압 처리를 통한 감귤 및 사과주스의 Polyphenoloxdiase (PPO)와 Peroxidase (POD)의 불활성화 동역학 연구
이원석 ( Won Suk Lee ),김창남 ( Chang Nam Kim ),최성원 ( Sung Won Choi ),허남윤 ( Nam Yoon Hur ),박석준 ( Seok Jun Park ),김병용 ( Byung Yong Kim ),백무열 ( Moo Yeol Baik ) 한국산업식품공학회 2015 산업 식품공학 Vol.19 No.3
주스의 품질악화를 초래하는 효소를 불활성화시키기 위해서 감귤 주스와 사과 주스 추출물에 초고압 처리와 열처리를 하여 각 시료의 PPO와 POD의 불활성화 정도를 확인하고 동역학 모델에 적용하여 이들의 불활성화 특성을 연구하였다. 감귤 주스와 사과 주스에서 모두 PPO가 POD보다 열과 압력에 대해서 상대적으로 내성을 갖는 것을 알수 있었으며, 초고압 처리 과정을 거쳤을 때 보다는 열처리 과정을 거쳤을 때 PPO와 POD가 효과적으로 불활성화되는 것을 확인할 수 있었다. 초고압 기술은 처리 후에도 제품의 영양분과 색의 변화에 영향을 미치지 않기에, 최상의 상태와 품질로 제품을 제공 할 수 있는 장점을 가지고 있지만, 효소를 불활성시키기에는 부족하다는 단점을 가지고 있다. 이를 보완하여 산업적으로 이용되어지기 위해서는 영양분이 파괴되지 않는 열 처리 조건을 잡고, 효소를 효과적으로 불활성시킬 수 있는 초고압 처리 조건과 결합하여 최상의 결과를 얻을 수 있는 조건을 찾는 연구가 필요하다고 판단된다. Although HHP processing is getting popular in the food industry, there are limited researches focused on the inactivation kinetics of enzymes such as polyphenoloxdiase (PPO) and peroxidase (POD) under HHP. The objective of this work was to elucidate the thermal and non-thermal inactivation kinetics of PPO and POD in citrus and apple juices. The citrus and apple used in this experiment were purchased from the local market. Fruit juices were extracted using a blender and were treated by heat (at 70-80oC for 10-30 min) and pressure (at 100-500 MPa for 10-60 min). HHP conditions used in this study were not sufficient enough to inactivate PPO and POD in both citrus and apple juices. PPO was relatively more heat and pressure stable than POD. Results of the HHP treatment could not be applied to kinetic modeling because the inactivation degree of both enzymes was almost insignificant. Through the results of the activation energy, this study suggested that the POD of citrus needed less energy than the POD of apple in order to inactivate enzymes.
임종수 ( Jong Soo Lim ),김희정 ( Hui Joung Kim ),오현이 ( Hyun Yi O ),이태욱 ( Tea Uk Lee ),박석준 ( Suk Jun Park ) 한국가축위생학회 2008 韓國家畜衛生學會誌 Vol.31 No.3
This survey was conducted to investigate the infection of caprine arthritis encephalitis virus (CAEV). From April to October 2007, we examined a total of 173 goats in 7 dairy goat-breeding farms located in Na-ju, Hae-nam, Young-am, and Young-gwang area of Jeonnam province. The results show that 41 (23.7%) goats are positive for CAEV, confirmed by nested PCR of 173 blood samples. Regional analysis revealed that a positive proportion for CAEV was 50.0% in Young-gwang, 25.6% in Young-am, 25.0% in Hae-nam, and 10.9% in Na-ju. Clinical signs were observed in 17 (9.8%) goats, of which 6 suffered from arthritis, 7 from mastitis, and 4 from pneumonia. Among the examined 173 goats, 8(4.6%) goats are positive for CAEV accompanied with CAE symptoms. There was a tendency to be much higher(p<0.05) levels of natrium(Na), chlorine(Cl) in CAEV-positive than in CAEV-negative goats. However, other serum biochemical values were no statistically significant effect.
항 C(rh`) 항체에 의한 지연 용혈성 수혈 반응 1 예
서정민,박동준,김판규,이혜경,조철수,심규식,박석준,이정득 대한내과학회 1993 대한내과학회지 Vol.45 No.1
A delayed hemolytic transfusion reaction precipitated by anti-C (rh') is described in a previously transfused 40-year-old man. Seven days after the transfusion of the 7 pints of red cells for anemia due to Mallory-Weiss syndrome, he experienced a fall in hematocrit and hemoglobinuria accompanied by a positive direct and indirect antiglobulin test. Anti-C (rh') was identified in the patients serum by Panel cell screening test.
위에 발생한 사구종양 1 예 : 내시경 초음파검사 소견을 중심으로 Role of Endoscopic Ultrasonography
김성철,이덕기,이동주,김종형,황동인,신현민,류두열,김석은,박석준 대한소화기내시경학회 2000 Clinical Endoscopy Vol.21 No.5
A glomus tumor of the stomach is a rare submucosal lesion that was first described by De Busscher in 1948. Submucosal tumors of the stomach are mostly leiomyoma, leiomyosarcoma, and malignant lymphoma. It is difficult to diagnose this kind of tumor preoperatively, We present a patient with a gastric glomus tumor which showed the characteristic endoscopic ultrasonographic (EUS) finding. Our case was also diagnosed by pathology after surgery. The major EUS findings in the present case are circumscribed low echoic mass in the forth submucosal layer and an internal heterogenous echo mixed with high echoic spots. The EUS seems to be useful in distinguishing between glomus tumor and other submucosal tumors.