Cyclic 활성슬러지 공정을 이용한 돈사폐수의 영양소 제거특성

조용진,임재명,이호식 江原大學校 附設 環境硏究所 1999 環境硏究 Vol.16 No.-

The cyclic activated sludge process is a modified activated sludge using the sequencing batch reactor(SBR) operation that can achieve the combination of carbon oxidation and nutrient removal. The operational characteristics of cyclic activated sludge process include a time-sequenced operation of anaerobic/aerobic/anoxic condition in a single reactor to achieve a maximum efficiency. The application of cyclic activated sludge process is, however, usually focused on the low strength wastewater including domestic sewage. As a result, limited attention has given to the high strength wastewater, especially for the piggery wastewater. The primary objective of this study is to evaluate an optimum operational cyclic to achieve combination of organic and nutrient removal using the piggery wastewater. The factors affecting inhibitory effects on nitrification during the cyclic operation is further determined. The result of this study, optimum operational cyclic of activated sludge process is 1hr : 2hr A/O(anoxic/oxic) ratio. Also, It was efficient that the SRT is operated more than 10 days and the specific nitrification rates were 0.04~0.24 ㎎N/gMv/hr at 20℃. Nitrification inhibition of piggery wastewater was found to occur at an influent volumetric loading over 0.3 NH₄-N ㎏/㎥/d. After a biological treatment, remaining phosphorus removal experiments were executed in oxidized ferrous column. As a result, the experiment showed the high density of variation in concentration by contact time on air. As for column aeration, completely phosphorus removal time was 25 minutes in contact time on air(20 hr) with aeration and 400 minutes(w/aeration) and 580 minutes(w/o aeration) in contact time on air(0 hr) respectively.

核置換에 의한 3n Populus alba×glandulosa의 育成 "in virto" 硏究

黃震聲,金鼎錫,尹基植 진주산업대학교 1985 論文集 Vol.23 No.-

생장이 속한 allotriploid의 Populus alba×glandulosa를 육성하기 위한 기초연구의 일환으로 2n-pollen의 대량획득 방법과 핵상별 anther culture의 최적방법을 규명하여 다음과 같은 결과를 얻었다. 1. Pectinase 1%, cellulase 2%, 그리고 D-mannitol 0.6M 등의 조성 enzyme액에서 pollen을 진탕처리한 결과 언 핵상의 pollen이나 80∼200분에서 cell wall이 용해되었다. 2. Pollen의 발아촉진을 위한 n-hexane처리의 회수와 핵상과는 관계가 없다. 3. Pollen의 X-ray에 대한 감수성은 핵상과 상관이 없고 고선량에서는 n과 2n-pollen 다같이 회분관 신장속도에 영향하였다. 4. Centrifuge force에 의한 n과 2n-pollen의 침강속도는 2n-pollen이 속하였다. 5. Anther culture를 위한 basic media와 plant hormone의 조성은 n-pollen에서는 W.S. basic media에 BAP 0.1ppm+NAA 0.5ppm이 가장 좋고 2n-pollen에서도 W.S. basic media에 BAP 0.1ppm NAA 0.5ppm이 가장 좋았다. The studies were carried out in order to induce vigorous growth through allotriploids of poplus alba<glandulosa. The results are as follows. 1. From n-, and 2n-pollen treated with enzyme solution containing 1% pectinase, 2% cellulase and 0.6M D-mannitol, the highest rate of pollen of cell wall dissolved were obtained in the 80 to 200 min. tretament. 2. n-, and 2n-pollen treated with n-hexane was no difference in the pollen germinatian. 3. n-, and 2n-pollen radiated with x-ray of 100-500kr was influence on the elongation speed of pollen tubes. 4. Sinking speed of pollen grains through centrifugal force was speedy in the tetraploid than in the diploid. 5. The production of callus through 2n-and 4n-anther culture varied with basic media and plant hormone, but good production was obtained from Wolter and Skoog medium containing 0.1ppm BAP and 0.5ppm NAA. 6. n-, and 2n-pollen plantleetsers were induced form populus alba×glandulosa anther cultured "in vitro" on synthetic medium.

Antiadhesive effect and safety of oxidized regenerated cellulose after thyroidectomy

Kyoung Sik Park,Kyu Eun Lee,Do Hoon Ku,Su-Jin Kim,Won Seo Park2,Hoon Yub Kim3,,Mi Ra Kwon1,Yeo-Kyu Youn1 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.84 No.6

Purpose: To evaluate the antiadhesive effects and safety of an oxidized regenerated cellulose (Interceed) after thyroidectomy. Methods: Seventy-six thyroidectomized patients were prospectively randomized into two groups with regard to the use of Interceed. We evaluated each group for their adhesive symptoms using four subjective and four objective items at the 2nd week, 3rd and 6th month after thyroidectomy. All patients were examined for vocal cord motility by indirect laryngoscope at each period. Results: Total adhesion scores at each postoperative follow-up period decreased with time, but were not significantly different in each group. The median score for swallowing discomfort for liquid was significantly lower in the Interceed group than in the control group 2 weeks after surgery. In addition, the severity of skin adhesion to the trachea was reduced in the Interceed group compared with the control group 6 months after surgery. During the study, there were no adverse effects or significant differences in postoperative complications between the groups. Conclusion: Interceed appeared to be safe and effective in improving neck discomfort at early postoperative periods and preventing skin adhesion to the trachea 6 months after thyroidectomy.

구강악안면 영역의 치성 감염 환자에 대한 세균학적 연구

김일규,윤승환,오성섭,최진호,오남식,김의성,이성호,배수환,강문수 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.4

Oral & maxillofacial infections are most commonly odontogenic in origin. Although such infections are usually self-limiting, they may occasionally spread deeply into fascial spaces or planes far from the initial site of involvement. If early diagnosis and appropriate therapy is delayed, complications such as mediastinal extension, retropharyngeal spread and airway obstruction could happen to the patients. For the study of the microbiology, we have retrospectively analysed the oral & maxillofacial infected patients in the Dept. of Oral & Maxillofacial Surgery, In-Ha University Hospital from 1997 September to 2000 April. The results were as follows 1.The male patients were more common than female, with male 61.9% and female 38.1%. 2.Dental originated infections were most common cause with the incidence of 62%. 3.Most common fascial space involved was buccal space 42cases(37.2%) followed by submandibular space 13cases(11.5%), infraorbital space 13cases(11.5%), masseteric space 11cases(9.7%) , periapical abscess 11cases(9.7%) . 4.The causative organisms isolated from the pus culture were Gram Positive Bacterial species, which were 46cases(31.9%) of Streptococcus viridans, 16cases(8.6%) of α and β-hemolytic streptococcus, 4cases(3.1%) of Strep.-group D non enterococci, 7cases(5.1%) of Staphylococcus Coa. Neg., 5cases(3.9%) of Staphylococcus aureus, 3cases(2.3%) of Enterococcus faecalis, 1case(0.8%) of Bacillus species, 1case(0.8%) of Peptostreptococcus, 1case(0.8%) of Clostridium and Gram negative bacterial species, which were 4cases(3.1%) of Acinetobacter baumannii, 2cases(1.6%) of Pseudomonas aeruginosa, 2cases(1.6%) of Burkholderia cepacia, 1case(0.8%) of Neisseria species, 1case(0.8%) of Klebsiella pneumoniae, 1case(0.8%) of Klebsiella oxytoca, 1case(0.8%) of Escherichia coli. 5.In drug sensitivity test, high resistant tendency was found in Penicillin system(Penicillin G 83.3%, Ampicillin 60%) and Aminoglycosides (Gentamycin 50%, Tobramycin 45.5%), but tertiary Cephalosporin system(Cefoperazone 9.1%, Ceftazidime 18.2%), and glycopeptides system (Teicoplanin 0% , Vancomycin 0%) showed lower resistancy.

인슐린 비의존성 당뇨병에 동반된 심상성 천포창 1 례

이상준,박진용,임태형,윤영호,권순대,남창욱,허규찬,박근용,구본식,김상표,장종억 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.3

저자들은 인슐린 비의존형 당뇨병 환자에서 통증성 구강내 미란 및 전신성 수포성 미란을 동반한 심상성 천포창 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Various skin conditions such as diabetic dermopathy, necrobiosis lipoidica diabeticorum, bullosis diabeticorum, granuloma annulare occur frequently in diabetes, although common lesions may be associated by chance. Pemphigus vulgaris(PV) is a blistering skin disease seen predominantly in elderly patients. This disorder is characterized by the loss of cohesion between epidermal cells with the resultant formation of intraepidermal blisters. These blisters rupture easily, leaving denuded areases that may crust and enlarge peripherally. In half or more of patients, lesions begin in the mouth: approximately 90% of patients have oromucosal involvement at some time during the course of their disease. But the relationship of this disorder with diabetes is not clear. We experienced a case of pemphigus vulgaris associated with NIDDM in 67 years old woman who was admitted due to painful oral ulcer and control of blood glucose, so we present this case with a review of literatures.

LCA 기법을 적용할 제품의 우선순위 선정 방법론

신동희,권은선,문승식,김만영,정종연,허진호 한국전과정평가학회 2004 한국전과정평가학회지 Vol.5 No.1

본 연구의 목적은 일정한 논리적 절차를 거쳐서 객관적인 전과정평가의 우선순위를 선정하기 위한 일반적인 방법론의 개발이다. 우선 전과정평가 대상이 되는 제품(산업군)의 우선순위를 평가하기 위해서 제품의 환경성과 관련된 환경규제, 국내외 전과정평가 수행사례, 유해물질 등을 평가항목으로 설정하였다. 설정된 평가항목들에 대한 자료조사 및 분석을 통하여 세분화한 데이터베이스를 생성하였으며, 또한 학계 및 산업계의 의견을 반영하기 위해 전과정평가 전문가 및 산업계 관계자들을 대상으로 설문조사를 실시하였다. 설문조사결과를 바탕으로 각각의 평가항목 및 세부평가항목의 가중치를 부여하였고, 각 평가항목별로 점수를 설정하였다. 본 연구에서 개발한 방법론은 우선순위를 비교해야하는 제품(산업군)들이 각각의 평가항목에서 설정해놓은 해당 점수를 부여받게 된다. 부여받은 각 평가항목의 점수들을 모두 합산하면 평가대상이 되는 제품(산업군)에 대해 하나의 우선순위 평가 점수를 갖게 된다. 이와 같은 과정으로 방법론이 구축되었으며, 사례연구를 통하여 방법론의 타당성을 검증하였다. 이렇게 산출된 우선순위 평가점수를 평가하고자하는 제품(산업군)들과 비교하여 높은 점수를 갖는 제품(산업군)이 전과정평가를 먼저 실시하는 것이 바람직하다는 결론을 얻을 수 있다. The purpose of this study is to develop a general method to decide the priority of LCA application through a logical procedure. First of all, evaluation categories were developed to decide priority of subject products(industrial groups). The evaluation categories consist of environment regulations related to subject product, LCA case studies, hazardous substances, etc. The subdivided database was constructed through researching and analyzing information about the selected evaluation categories. In addition, a questionnaire was conducted to reflect the opinions from academic and industrial circles. Based on the result of the questionnaire, each evaluation category and sub-evaluation category were weighed differently, and certain points were assigned to them. According to the method developed in this study, comparing industrial groups or products for prioriting will have its total score that is a sum of points assigned to each evaluation category. This results that an industrial group or product having higher score than the others becomes the subject to apply LCA.

Expression of growth hormone/insulin-like growth factor axis genes in olive flounder (Paralichthys olivaceus) fed a diet with partial replacement of dietary fish meal

Jin-Sung Moon,Dae Han Oh,Su-Jin Park,Jin-Song Seo,Dong-Uk Kim,Seong-Hwan Moon,Hung Sik Park,Sang-Gu Lim,Kang-Woong Kim,Bong-Joo Lee,Sang-Woo Hur,Hyeong-Jun Lee,Taek Jeong Nam,Youn Hee Choi 한국수산과학회 양식분과 2019 한국수산과학회 양식분과 학술대회 Vol.2019 No.5

균일한 컬러 디밍 가능한 100W급 무대조명용 혼색기법 개발

윤진식(Jin-Sik Youn),박정욱(Joung-Wook Park),홍진표(Jin-Pyo Hong),송상빈(Sang-Bin Song),임영철(Young-Cheol Lim) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월

A stage lighting is used for representing the mood of the stage as a director intends. Since a LED has several advantages such as a fast responsibility and a dimming ability, it is most useful for developing a stage lighting as a lighting source. However, it is necessary to develop the color mixing technique considered the wave length spectrum of the LED for dimming the color uniformly. In this paper, we measure the wave length power spectrum of the LED module and simulate the color coordinates by using the chromaticity diagram of the CIE1931 and the pwer spectrum data. Also, we establish the experiment set and compare the simulation result with the experimental result.

Development of method to discriminate the geographical origin of sorghum using XRF with multivariate data analysis

Yong-Sik Youn,Jae-Min An,Dong-Jin Kang,Ji-Hye Lee,Jeong-A Choi,Da-Hey Jin,Seong-Hee Lee,Seong-Hun Lee 한국분석과학회 2020 학술대회논문집 Vol.2020 No.11

Development of method to discriminate the geographical origin of lotus root using XRF with multivariate data analysis

Yong-Sik Youn,Jae-Min An,Dong-Jin Kang,Ji-Hye Lee,Jeong-A Choi,Da-Hey Jin,Ji-Yeon Eom,Seong-Hun Lee 한국분석과학회 2021 학술대회논문집 Vol.2021 No.5