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정은호(Eun-Ho Jung),박기원(Ki-Won Park) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2
The study experimented to understand the ice making characteristics on to kinds of round tube type and oval tube type using ice maker. The experiment were carried out under various conditions, that used brine temperature -10~-6℃, brine flow rate 1.0~1.8 m/s and inlet water temperature 6~12℃ etc. Mass of ice per making area increased according to the decrease of the brine temperature and inlet water temperature, but that was increased according to the increase of the brine flow rate.
정은호(Eun-Ho Jung),박기원(Ki-Won Park) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.5
Ice accumulating system patterned ice-an-coil is the way of refrigerating regenerative materials on the surface of copper-tube inserted into the inside of ice-storage. The study experimented to understand ice-an-coil type ice making characteristics according to changing shape of ice making tube. The experiment were carried out under various conditions, that used brine temperature(-10℃, -6℃), brine flow rate(1.0 ㎧, 1.8 ㎧) and inlet water temperature(6℃, 12℃) etc. Mass of ice per making area increased according to the decrease of the brine temperature and inlet water temperature, but that was increased according to the increase of the brine flow rate. And I set up two hypotheses and compared the capacity of ice-making of the two cases; each had the same thermal area and one had an round-shaped copper tube but the other had an oval-shaped copper tube.
비상품 양파추출물의 Mouse 피부암 및 위장암 억제효과
이찬중(Chan-Jung Lee),김희대(Hee-Dae Kim),정은호(Eun-Ho Choung),서전규(Jun-Kyu Suh),박철우(Cherl-Woo Park),하영래(Yeong-Lae Ha) 한국식품영양과학회 2000 한국식품영양과학회지 Vol.29 No.3
상품가치가 없는 비상품구로부터 추출한 OWE를 mouse의 피부암 및 위장암 저해 효과에 관한 실험을 한 결과 피부암의 경우 control구에서는 6주부터 종양이 발생하여 23주에는 mouse 당 2.9개의 종양이 발생하였으나, 20 mg OWE 처리구에서는 8주부터 종양이 발생하여 23주에는 mouse 당 1.3개의 종양이 발생하여 control에 비해 55.2%의 종양 억제효과가 있었다. 20 mg quercetin 처리에서는 6주부터 종양이 발생하기 시작하여 23주에는 mouse 당 1.2개의 종양이 발생하였다. 처리별 암 발생율은 20 mg OWE 처리에서 85.7%, 20 mg quercetin처리에서는 76.2%의 발생율을 보여 control의 95.2%에 비해 낮은 암발생율을 보였다. 위장암의 경우 control에서는 mouse당 9.2개의 종양이 발생하였고, 50 mg OWE 및 25 mg OWE 처리에서는 각 6.1, 6.3개의 종양이 발생하여 control에 비해 각각 33.7%, 31.5%의 종양억제효과가 있었다. 그리고 25 mg quercetin처리에서는 mouse 당 5.3개의 종양이 발생하였다. 처리별 암발생율은 50 mg OWE 및 25 mg OWE 처리에서 각 88.2%, 94.1%, 25 mg quercetin처리에서 83.3%의 발생율을 보여 control 100%에 비해 낮은 암발생율을 보였다. Effect of the onion waste extract (OWE) on chemical carcinogen-induced mouse epidermal and forestomach carcinogenesis was investigated. Female ICR mice (6~7 weeks of age) were adapted in a temperature- and humidity-controlled house for one week. In a epidermal carcinogenesis model, animals were randomly divided into 3 treatment groups (7 mice/cage, 21 mice/treatment group). Back of the mouse was shaved 10 days before 7,12-dimethylbenz[a]anthracene (DMBA) treatment. OWE (20 mg/0.2 mL acetone) or quercetin (20 mg/0.2 mL acetone) was painted on the back of the mouse on 7th-days, 3th-days and 5-min before the initiation of carcinogenesis with DMBA (50 nmole/0.2 mL acetone). Control mice were received only 0.2 mL acetone. From one week after the initiation, each mouse received twice weekly injection of phorbol 12-myristate 13-O-acetate (TPA: 6 μg/0.2 mL acetate) until the termination of experiment (23 weeks). In forestomach carcinogenesis model, female ICR mice (6~7 weeks of age, 10 mice/cage, 20 mice/treatment group) was randomly divided into 4 treatment groups: 50 mg and 25 mg OWE/0.2 mL soybean oil, 25 mg quercetin/0.2 mL soybean oil, and 0.2 mL soybean oil only. Mouse received sample through garbage on Monday and Wednesday, and benzo[a]pyrene (BP) (2 mg/0.2 mL soybean oil). This treatment process was repeated for 4 weeks. Control mice received soybean oil only. In the case of epidermal carcinogenesis, OWE treatment (1.3 tumors/mouse) reduced the number of tumors per mouse, relative to that of the control (2.9 tumors/mouse), but similar to that of quercetin treatment (1.2/mouse). The tumor incidence (85.7%) in mouse treated with OWE was slightly reduced as compared to that (95.2%) of the control, and slightly higher than that (76.2%) of quercetin treatment group. OWE treatments (50 mg and 25 mg) reduced the number of forestomach tumors per mouse to 33.7% and 31.5% of the control, respectively. However no difference was observed from quercetin treated mouse. Forestomach tumor incidence was also reduced from 100% (control) to 88.2% (50 mg OWE) and 94.1% (25 mg OWE). The tumor incidence of 50 mg OWE was similar to that (83.3%) of 25 mg quercetin treatment. These results indicate that OWE inhibited the initiation of epidermal and gastric carcinogenesis in mice, and the effective dose was similar to quercetin.
혐기바이오비드를 이용한 UASB 반응기의 제지폐수 처리특성
정종태 ( Jong-tai Jung ),한상윤 ( Sang-yun Han ),정은호 ( Eun-ho Chung ) 한국수처리학회 2018 한국수처리학회지 Vol.26 No.3
In this study, Anaerobic beads with 0.85~1.45 ㎜ diameters were produced by direct injection and mixing(100 rpm for 3 minutes) of anaerobic sludge 200 ㎖(average MLSS concentration 38,000 ㎎/L) and 1.5% sodium alginate solution. The paper wastewater treatment of the sequencing batch reactor with anaerobic biobeads could achieve about 85% COD removal after 6 days. With this remarkable results of this study, it can apply to the way of the removal efficiency stabilization and starting up of the UASB reactor because it didn’t happen the sludge rising and washing out although the maximum upflow velocity increased to 0.26 m/hr.
시험관아기로 임신된 쌍태아 중 일측 태아에서 위양성 Acetylcholinesterase를 보인 임신 1례
은미나 ( Mi Na Eun ),김현쳘 ( Hyeon Chul Kim ),신승주 ( Seoung Ju Shin ),차선희 ( Sun Hee Cha ),김낙근 ( Nack Keun Kim ),김지연 ( Ji Yoeun Kim ),정상근 ( Sang Geun Jung ),강석호 ( Suk Ho Kang ),김수진 ( Su Jin Kim ),정은호 ( Eun H 대한주산의학회 2003 Perinatology Vol.14 No.3
임신 중반기 여성에서 개방성 신경관 결손증의 선별검사로서 모체 혈청내 알파태아단백이 이용되고 있다. 모체 혈청 AFP의 증가는 임신 주수의 과소추정이나 신경관 결손증 외에도 태아의 선천성 신증, 식도나 장폐쇄와같은 소화기 질환, 복부결손등의 선천성 기형과 연관이 있으며 이외에도 저체중 출생아, 양수감소증, 태아 사망 및 염색체이상등의 경우에서도 증가하게 된다. 이 경우 초음파 검사를 통해 제태 연령을 재측정하거나 기형 여부, 다태 임신, 태아사망 등을 감별해야 한다. 신경관 결손증이 의심되거나 초음파가 비진단적인 경우, 양수천자를 실시하여 양수내 AFP를 검사하게 되는데, 이 역시 증가한 경우에는 AFP 증가의 위양성의 가능성을 배재하기 위해 Acetylcholinesterase를 측정하는 것이 도움이 된다. AChE 검사는 신경관 결손증을 진단하는데 98% 이상의 검출율을 보이고 있으며 위양성율은 0.14% 정도로 보고 되고 있는데 태아나 모체의 혈액이 감염된 경우 위양성율이 증가된다. 본원에서는 난자 세포질내 정자 주입술(ICSI) 및 접합자 난관내 이식술(ZIFT)을 통해 임신 된 쌍태임신에서 양수검사를 시행하여 일측 태아에서 AFP가 증가하였으며 AChE 또한 양성 소견 보여표적 초음파를 시행하였고, 이상 소견이 보이지 않아 유전상담과 반복 초음파 시행하면서 만삭까지 임신을 유지시켜제왕절개로 정상의 쌍태아를 분만한 예를 경험하였기에 간단한 문헌 고찰과 함께 보고하는 바이다. Maternal serum alpha-fetoprotein(MSAFP) has been a world wide screening test for open neural the tube defect. But elevation of MSAFP is related to not only neural tube defect, but also incorrect gestational age, congenital anomalies such as congenital nephrosis, esophageal & intestinal obstruction, low birth weight, oligohydroamnios, fetal death and chromosomal anomalies. If MSAFP is elevated, gestational age, congenital anomalies such as neural tube defect, multiple pregnancy and fetal death must be evaluated by ultrasound. When the ultrasound is nondiagnostic, amniotic fluid AFP(AFAFP) levels are measured and if AFAFP is elevated, presence or absence of aetylchoineststarase(AChE) is determined to rule out the false positive of amniotic AFP. Amniotic AChE test yielded detection rate of open spina bifida of 99%, 98% for anecephaly and a false-positive rate of 0.34%. We report a case with elevated AFAFP and positive amniotic AChE result in one fetus of the twin pregnancy conceived by ICSI and ZIFT, but in which targeted ultrasound findings were normal, maintained the pregnancy to term and normal twin was delivered by elective cesarean section.