유아의 과학적 탐구능력 증진을 위한 과학교육 프로그램 개발 : “물”에 대한 발견과 발명

이현옥,한정희,손지현,손여민,정은주,김소리 서울여자대학교 2006 아동연구 Vol.12 No.-

.

사업체 급식의 HACCP 제도 도입을 위한 인지도 조사

이헌옥,심재영,신현아,정덕화,엄애선 한국조리과학회 2002 한국식품조리과학회지 Vol.18 No.3

For the introduction of HACCP to industry food service, a survey was conducted from 150 dieticians and 40 managers on their recognition on HACCP system. The questionnaire of the survey included the status of current food safety management, management responsibilities, recognition on HACCP, problems in HACCP introduction. The majority of respondents was satisfied with the current food safety management, and the food service managers were more confident than dieticians in terms of food safety. Foodservice managers (100%) and dieticians (96%) recognized HACCP system; however, they responded the application of HACCP to industry food service were only 27% and 12.5%, respectively. They pointed out the reasons that they cannot introduce HACCP to their industry food service were the lack of benefits and good facilities. Dieticians strongly recognized the need of correction of food safety management in industry food service, compared with food service managers. The results suggest that the introduction of HACCP to industry food service should be accomplished by continuous education and information on food safety, improving facilities and a variety of benefits to HACCP-implemented companies from the government.

입자충전상 여과장치에서의 집진효율 개선에 관한 연구

박옥현,손영수 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.52 No.-

이동식 입자충전층 여과장치의 효율을 개선하기 위해 향류, 병류 및 교차류에 대해 기류속도, 충전물 침강속도, 충전물 크기 및 분진부하 등의 조작조건을 각각 0.24∼0.47m/s, 2.98∼ 16.71g/s, 2∼6㎜ 및 3.5∼17.24㎎/s 범위에서 변화·조작 하면서 제진효율 측정실험을 수행하였다. 실험에 사용된 시료 분진은 1차 입자상 대기오염물질인 fly ash였고 그 입경범위는 1∼8㎛였으며, 입도분포는 대수정규분포였고, 기하평균경은 약 1.7㎛였다. GBF장치의 입구 및 출구에서 채취된 분진은 Coulter counter(Model TA Ⅱ and PCA Ⅰ)를 이용해서 크기별 개수농도로 측정되었으며, 효율계산시에 질량농도로 환산하였다. 본 연구를 통해 얻은 주요한 결론들은 다음과 같다; 모든 기류방향에서 기류속도가 증가함에 따라, 충전물 이동속도 감소에 따라, 그리고 충전물이 클 경우엔 분진부하가 감소함에 따라 각각 포집효율이 증가하는 경향을 보였다. 향류에서는 충전물 크기가 작을수록 제진효율이 증가하였으나 병류와 교차류에서는 그런 경향이 나타나지 않았다. 제진효율에 각 운전조건들이 미치는 영향은 복잡하기 때문에 이동식 GBF에서의 제진효율 평가를 위해 각 운전조건들을 독립변량으로 하는 중회귀식들을 만들었던 바, 이 식들을 적용해서 구한 효율 평가치들을 실측치들과 비교하므로서 특히 향류 및 교차류 때의 중회귀식들의 유용성이 확인되었다. In order to improve dust collection efficiency of moving granular bed filter (;MGBF) experiments measuring dust removal efficiency for countercurrent flow, concurrent flow and crosscurrent flow have been carried out under control of dust laden gas velocity, packing velocity, packing size and dust load in the range 0.24∼0.47m/s, 2.98∼16.71 g/s, 2∼6㎜ and 3.5∼17.24㎎/s, respectively. Fly ashes taken from a power plant whose equivalent diameter ranges from 1 to 8㎛ were selectively used as sample dust. Size distribution was log normal and geometric mean diameter was about 1.7㎛. Size of dusts taken at inlet and outlet of collector was measured by using Coulter counter(Model TAⅡ and PCA Ⅰ) according to each grade in number concentration, and the results were converted to mass concentration for efficiency calculation. Significant conclusions were drawn as follows ; For each flow type, collection efficiency tends to increase as dust laden gas velocity increases, as packing velocity decreases, and as dust load decreases when packing size is big. For countercurrent flow dust removal efficiency increased as packing size become smaller while such tendency did not happen for concurrent flow and crosscurrent flow. Since the effect of various operational conditions on dust removal efficiency is complex, multiple regression equations of efficiency were established using operation variables as independent ones. Particularly those regressions for countercurrent flow and crosscurrent flow appear to be useful.

P277 : Moisturizing effect of Rubus coreanus extract containing lotion on human skin

( Hyun Ok Son ),( Sin Wook Chun ),( Sang Yoon Lee ),( Shin Han Kim ),( Byung In Ro ),( Han Kyoung Cho ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2

Background: Rubus coreanus has been used as traditional alternative medicine for treatment of asthma and allergenic disease for centuries. Recent studies reported that the anti-inflammatory effect and immune-modulation effect of Rubus coreanus in cultured cell system or animal model. Though many previous reports proved potent mechanisms of Rubus coreanus for treatment of atopic disorders but its topical effect in clinical examination was not reported yet. Objectives: To measure the moisturizing effect of a cosmetic lotion containing 1% of R. coreanus Methods: Single application of the R. extract lotion increase skin hydration level and lasted for 24 hours. Results: Skin barrier function disturbed by tape stripping was recovered faster than non-treated control. 4 weeks of repeated treatment of the lotion significantly increase hydration level of skin from the baseline Conclusion: These results are the first clinical report for the Rubus coreanus regarding its topical treatement and moisturizing effect. Rubus coreanus extract lotion can be a good topical moisturizer for atopic skin.

A clinical study of patients with alopecia during 8 years

( Hyun Ok Son ),( Sin Wook Chun ),( Suk Young Lee ),( Jong Baik Kim ),( Byung In Ro ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2

Background: Alopecia is a loss of hair from scalp or body. Alopecia has an effect on quality of life psychosocially and cosmetically. Objectives: To evaluate the prevalence of patients with alopecia including androgenic alopecia (AGA), alopecia areata(AA; AT, AU included) and other alopecia. Methods: We collected retrospective data from the medical records with 3,045 out-patients who were diagnosed as alopecia in the Alopecia Clinic, Department of Dermatology, Myongji Hospital during 8 years from March, 2007 to February, 2015. Results: The incidence of alopecia was as follows: AGA (67.7%, n=2,060), AA(28.0%, n=853), telogen effluvium(1.8%, n=56) and others(2.5%, n=76: woolly hair, trichotillomania, cicatricial, traction alopecia). The sex distribution showed 1593 men (52.3%) and 1452 women (47.7%). The age distribution showed a peak incidence in the 3rd to 4th decade (48.4%, n=1,475). Of the 1,198 male pattern hair loss (MPHL) patients,Norwood Hamilton type IIIv was the most common(19.5%). Of the 862 female pattern hairloss(FPHL) patients, Ludwig’s type I was the most common(65.6%). Conclusion: This study supports the fact that the number of patients with early-onset alopecia is increasing recently in Korea.

P348 : Molluscum contagiosum with atypical manifestation in adult

( Hyun Ok Son ),( Sang Yoon Lee ),( Sin Wook Chun ),( Suk Young Lee ),( Han Kyoung Cho ),( Byung In Ro ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.1

A case of intraepidermal epithelioma of Borst-Jadasshon

( Hyun Ok Son ),( Sin Wook Chun ),( Suk Young Lee ),( Jong Baik Kim ),( Han Gyu Choi ),( Han Kyoung Cho ),( Byung In Ro ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1

Intradermal epithelioma of Borst-Jadasshon was first reported in 1904 by Borst. It is a rare cutaneous neoplasm but the existence of intradermal epithelioma of Borst-Jadasshon as a distinct entity has been disputed. The Borst-Jadassohn epithelioma refers to a histopathological appearance rather than a precise clinicopathological entity. The true nature of the intraepidermal epithelioma of Borst-Jadasshon is poorly understood. Histologically, it is characterized by nests of neoplastic cells situated within and surrounded by normal keratinocytes. Some believe it merely represents a morphological phenomenon that can be encountered in a number of distinct benign or malignant lesions, including clonal seborrheic keratosis, clonal Bowen’s disease, hidroacanthoma simplex and porocarcinoma. A 54-year-old woman presented to our hospital with nodule on left calf. It was often pruritic. The lesion was a single flat-topped, skin-colored and firm nodule. Under the impression of clinically dermatofibroma, biopsy was done. The skin biopsy specimen showed acanthosis and well-defined islands within the epidermis.

A case of sparganosis diagnosed by ultrasonography

( Hyun Ok Son ),( Sin Wook Chun ),( Suk Young Lee ),( Jong Baik Kim ),( Han Gyu Choi ),( Han Kyoung Cho ),( Byung In Ro ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1

Sparganosis is a parasitic infestation caused by sparganum,a plericercoid larvae of the tapeworms belonging to the genus Spirometra. Humans are accidental hosts in the life cycle of sparganosis, becoming infected by contact or ingestion of the first or second intermediate hosts such as a frog or snake. The life-span of the sparganum in humans is not exactly known, but it can survive for at least 9 years. The larvae migrate to the subcutaneous tissues in human, which the diseases usually manifest within a subcutaneous mass. The lesion may be pruritic and give a tender or non-tender sensation. Sparganosis may also involve internal organs, including the eye, brain, and spinal cord. Sparganosis is typically diagnosed by surgical removal of the worms due to the difficulty of preoperative diagnosis. In some cases, the precise diagnosis can be missed due to a lack of suspicion by the primary physician. In this case, we have experienced a case of sparganosis, diagnosed by ultrasonography. A 58-year-old woman with a history of the ingestion of a frog decades ago, presented to our hospital with single nodule on right thigh. Under the impression of clinically lipoma, ultrasonography was done. The ultrasonography showed hypoechoic serpiginous tubular lesions in the subcutaneous soft tissue. After diagnosing sparganosis, we have extracted the sparganum which measured about over 20cm in length.

P277 : A case of disseminated superficial actinic porokeratosis

( Hyun Ok Son ),( Sang Yoon Lee ),( Sin Wook Chun ),( Suk Young Lee ),( Byung In Ro ),( Han Kyoung Cho ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.1

Lobulated intradermal nevus in young woman

( Hyun Ok Son ),( Sin Wook Chun ),( Suk Young Lee ),( Jong Baik Kim ),( Han Gyu Choi ),( Han Kyoung Cho ),( Byung In Ro ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1

Lobulated intradermal nevus is a rare entity characterized by the distinct clinicohistopathological findings and is similar to a regressing melanocytic nevus. In 1991, Cho et al. first reported 3 cases of lobulated intradermal nevi and suggested that their cases represented an unusual form of regressing melanocytic nevus. It clinically showed yellowish lobulated growth and histopathologically exhibited fat cell infiltration amidst nests consisting nevus cells, dermal fibrosis and neuroid differentiation of nevus cells. These changes are typically encountered in elderly individuals and usually not expected in young patients. We report a case of lobulated intradermal nevus in a young female patient. A 31-year-old woman presented to our hospital with scalp mass which developed for over 10 years. It was asymptomatic. The lesion was a single pedunculated mass with a yellowish lobulated suface and with focal hyperpigmentation. Under the impression of clinically skin tag or nevus lipomatous superficialis, biopsy was done. The skin biopsy specimen showed fatty infiltration within nests of nevus cells with dermal fibrosis.