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PIV를 이용한 Dynamic Axial 교반시스템의 유동 특성에 관한 연구
배기화(Kihwa Bae),김정환(Junghwan Kim),박재현(Jae hyoun Park),박형욱(HyungWook Park),김봉환(Bong Hwan Kim) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
The agitation system which is used generally in industry has one axis in one drive motor and the form which has 1~2 impellers accomplishes. From origination nine PIV measurements led about agitation system of the form which has 2 dynamic axes in one drive motor the agitation ability of the agitation system which has shortening and compared. In compliance with the research which sees the agitation system which has the dynamic axis only compared in the agitation system which has rejecting and with the fact that has a more superior agitation effect appeared.
PIV를 이용한 Dynamic Axial 교반시스템의 유동 특성에 관한 연구
배기화(Kihwa Bae),김정환(Junghwan Kim),박재현(Jae hyoun Park),박형욱(HyungWook Park),김봉환(Bong Hwan Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
The agitation system which is used generally in industry has one axis in one drive motor and the form which has 1~2 impellers accomplishes. From origination nine PIV measurements led about agitation system of the form which has 2 dynamic axes in one drive motor the agitation ability of the agitation system which has shortening and compared. In compliance with the research which sees the agitation system which has the dynamic axis only compared in the agitation system which has rejecting and with the fact that has a more superior agitation effect appeared.
납의 반복투여에 의한 랫드 신장과 간장에서 GST 발현에 미치는 영향
조정식,김철규,신동환,한범석,김준규,조용연,김신희,이근영,안진홍,조미행,고진경,양기화 식품의약품안전청 2001 식품의약품안전청 연보 Vol.5 No.-
납은 체내에 축적쓸 결우 겄강을 해치는 것뜨로 알려진 대표적인 환경오염물질이다. 특히 신경계, 생식기계, 면역계, 조혈잠기 및 신장에 영향을 주는 것으로 보고되고 있다- 껑리적인 상태나 이 물질에 대한 적응 과정이 일껄을 통하여 계속 변화하기 때문에 최근에는 은해물질에 대한 연령단계별 독성 발현 연구가 활밭히 이루어지고 있다. 납의 주오-한 표적장기인 신장과 간장에서 연령별 GST 활성도 변화와 GSff 및 지방과산화의 변화를 관찰하기 위하여 1, 2, 5, 8 개월령의 수컷 랫드에 음수로 0, 0.04, 0.?, 0.8%의 lead acetate를 투여하였다. 간장의 GST는 1,2,5개월령의 고농도 lead acetate 투여군예서만 활성이 존가하는 것으로 나타났고 8개월령은 다른 연령군과 비교하여 증가한 증향을 나타내었는 페 보상성 증가라 생각된다. 진장의 GST 활성도는 투여농도에 따른 영항은 나타내지 않았고 대조군의 8개월령에서 감소하는 경향을 나타낸 것은 연령에 의한 강소라 생각된다. MDA 생성은 간장과 신장에서 또두 투여농도글 따른 변화는 관찰되지 않았고 8개월령의 랫드 간장에서 MDA 생성이 다른 연령군에 비하여 증가한 경향을 나타낸 것은 고령에 따른 지방과산화의 증가라 생각된다. 간장쑥서의 GSll 수즌은 연령예 따른 변하와 투여농도에 따른 변화를 나타내지 않았고, 8개월령의 0.8%음수 투여군에서 증가하브는데 그것은 창산화 작용의 감소에 따른 생체 보상적 반응에 의하여 증가한 것으로 생각된다 음수릎 통한 납-쏜복투여 실험에서 1, 2, 5, 8개월령의 랫드에 특징적인 G5 활성도의 변화극 4'?팔할누 .었으며, 깥찰된 변확는 연령에 따른 변화라 생각된다. 연령과 낟의 oxidative stress에 끽란 상관관계를 관찰f'기 위하여 여러 종류의 항깐화 효소 및 항산화 물질을 분석하고 고령의 랫드에 대한 연구가 이루어져야 할 것으로 생각된다. Recent studies shown that lead causes oxidative stress by inducing of reactive oxygen species, reducing the antioxidant defense system of cells via depleting glutathione, inhibiting sulfhydry-dependent enzymes, interfering with some essential metals needed for antioxidant enzyme activities, and increasing susceptibility of cells the oxidative attack by altering the membrane integrity and fatty acid composition. The age related changes in the oxidative status of glutahione, lipid peroxidation, and the activity of the enzymatic antioxidant defense system, as well as the influence of aging on the susceptibility to the effects of lead acetate were investigated in rats of different ages. The effect of repeated exposure to lead acetate on the expression of glutathione S-transferase(GST) and the levels of reduced glutathione(GSH) and malondialdehyde(MDA) was determined. Male Sprague Dawley rat at 1, 2, 5 and 8 months were exposed to 0, 0.04, 0.2 and 0.8% lead acetate in drinking water for 13 weeks and fed a commercial diet. The activity of GST was elevated in liver 1, 2 and 5 months highly exposed groups and the age associated increases in 8 months groups may be an attempt by the organism to counter balance the decreases in the reducing power of liver. MDA levels were not effected by lead exposure in liver and kidney. The increased liver MDA levels in 8 months groups compared with young rats means that increased lipoperoxidation is a consequence of aging. Glutathione levels responsible for the regulation of intracellular level of lipid peroxidation during ageing were not effected by lead exposure in liver. The increase of GSH in 8 months highly dosed group may be an adaptive response. This study demonstrates that repeated lead exposure by drinking water dose not cause dramatic changes in expression of GST, and that some changes are not a result of oxidative stress.
마이크로웨이브 진공건조로 생산된 마늘, 고추 분말의 품질특성
김다인(Dain Kim),여성순(Seoungsoon Yeo),신의철(Euicheol Shin),송혁환(Hyukhwan Song),김기화(Kihwa Kim),이형용(Hyoungyong Lee),정윤화(Yoonhwa Jeong),김미숙(Misook Kim),이영승(Youngseung Lee) 한국식품영양과학회 2018 한국식품영양과학회지 Vol.47 No.10
이 연구는 열풍, 동결, 마이크로웨이브 진공 건조방법으로 생산한 마늘, 고추 분말의 품질을 비교하고 특성을 알아보는 것이 목적이었다. 일반성분에서는 건조방법에 따른 유의적인 차이를 보이지 않았다. 열풍 건조한 마늘, 고추 분말의 pH가 유의적으로 낮은 값을 보였고 동결건조 한 마늘, 고추분말의 용해도가 유의적으로 높은 값을 보였고 원물의 색상을 가장 잘 나타냈다. 수용성비타민은 마늘, 고추 분말 모두 열풍건조에서 비타민 B₁, B₂의 값이 유의적으로 낮게 나왔고 마이크로웨이브 진공건조에서 비타민 B₃, C의 값이 유의적으로 낮게 나타났다. 마늘 분말은 건조방법에 따른 무기질 함량의 차이가 없었으나 고추 분말은 동결건조 분말의 P, Mg, Mn, Cu, Zn 값이 유의적으로 낮게 나타났다. 물성은 마늘 분말에서는 열풍건조 분말의 응집성이 유의적으로 높은 값을 보였고 고추 분말에서는 마이크로웨이브 진공건조 분말의 응집성이 유의적으로 높게 나타났다. 소비자 조사결과 건조방법에 따른 분말의 외관 및 향 강도의 차이는 나타났으나 분말을 조리식품에 적용했을 때에는 소비자 기호도에 영향을 미치지 않았다. This study was conducted to compare and characterize the quality of garlic and chili pepper powders prepared by hot air drying (HD), freezing drying (FD), and microwave vacuum drying (MVD) methods. There was no significant difference in proximate analysis according to drying methods. The pH of HD dried garlic and chili pepper powder was 6.30 and 5.02 respectively, which were significantly lower than that of the MVD. The solubility of garlic powder was highest for FD, while the FD and MVD showed higher solubility of chill pepper powder. Both samples showed significantly lower values of vitamin B₁ and B₂ for HD and significantly lower values of vitamin C for MVD. There was no difference in the mineral contents of garlic powder according to the drying methods and the P, Mg, Mn, Cu, and Zn values of chili pepper powder were lowest for FD. The cohesiveness of HD powder was significantly higher in garlic powder, while the cohesiveness of MVD powder was significantly higher in chili pepper powder. Sensory evaluation showed no significant difference in characteristics when dry powder was applied to cooked food.
Diagnosis and treatment of a calf with patent urachus
Ha, Seungmin,Kim, Sooyoung,Kim, Seongmin,Park, Sookyoung,Lee, Soochan,Jung, Kihwa,Kim, Euntae,Gang, Seokjin,Han, Taeseok The Korean Society of Veterinary Service 2018 韓國家畜衛生學會誌 Vol.41 No.1
A 2-month-old female Holstein Friesian calf was noted to leak urine from the umbilicus during urination. She urinated through both the umbilicus and the urethra. A conduit from the umbilicus to the bladder was identified with ultrasonography. Uroperitoneum was ruled out because blood urea nitrogen and creatinine were within reference ranges. Surgery was performed to resect the patent urachus. Urachitis was identified during surgery. Dexamethasone and an antibiotic were used for the inflammation and postoperative cares. Meloxicam was substituted for dexamethasone since the calf showed side effects to dexamethasone. The calf recovered completely and there was no urine leakage from the umbilicus.
Diagnosis and treatment of a calf with patent urachus
( Seungmin Ha ),( Sooyoung Kim ),( Seongmin Kim ),( Sookyoung Park ),( Soochan Lee ),( Kihwa Jung ),( Euntae Kim ),( Seokjin Gang ),( Taeseok Han ) 한국동물위생학회(구 한국가축위생학회) 2018 韓國家畜衛生學會誌 Vol.41 No.1
A 2-month-old female Holstein Friesian calf was noted to leak urine from the umbilicus during urination. She urinated through both the umbilicus and the urethra. A conduit from the umbilicus to the bladder was identified with ultrasonography. Uroperitoneum was ruled out because blood urea nitrogen and creatinine were within reference ranges. Surgery was performed to resect the patent urachus. Urachitis was identified during surgery. Dexamethasone and an antibiotic were used for the inflammation and postoperative cares. Meloxicam was substituted for dexamethasone since the calf showed side effects to dexamethasone. The calf recovered completely and there was no urine leakage from the umbilicus.
A case of livedoid vasculopathy with subcutaneous involvement
( Junki Kim ),( Kihwa Choi ),( Jiyeoun Lee ),( Taeyoung Yoon ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1
Livedoid vasculopathy has been accepted as a nonvasculitic disorder, usually involve the superficial and mid-dermis. Sometimes vasculopathy in the underlying subcutis can occur in cases of connective tissue disease. We report a case of livedoid vasculopathy with underlying subcutaneous involvement in a 24-year-old man who has no underlying connective tissue disease. Skin lesions revealed superficial ulceration, purpura, atrophie blanche, and reticulate erythema on the lower extremities, and a skin biopsy showed a minimal dermal perivascular lymphocytic infiltrate with marked fibrin thrombi and fibrin deposits along luminal vessel walls, consistent with features of livedoid vasculopathy. And also a perivascular lymphocytic infiltrate with marked fibrin thrombi and fibrin deposits along luminal vessel walls were also found in the underlying subcutaneous tissue. To our knowledge, this is the first case report of livedoid vasculopathy with subcutaneous involvement in a man who has no underlying disease.
A case of nodular lichen sclerosus et atrophicus
( Junki Kim ),( Kihwa Choi ),( Jiyeoun Lee ),( Taeyoung Yoon ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1
Lichen sclerosus et atrophicus (LSA) is a chronic inflammatory skin disease, which most commonly involves the anogenital region and presents as atrophic plaques. Herein, we report a vulvar lichen sclerosus presenting as a nodular lesion which is a unique clinical feature. A 60-year-old woman has a yellowish nodule and twoslightly raised whitish plaques on the vulva. A skin biopsy from the nodule showed an effaced epidermis and homogenized edematous papillary dermis which is more thicker in the nodular lesion than that in the slightly raised plaque lesion. Vulva lichen sclerosus usullay present as porcelain-white atrophic plaque, but sometimes slightly raised plaque have been reported previously. Nodular lichen sclerosus et atrophicus has not been reported before, so this is the first report of nodular LSA.