점토벽돌제조용 원료로서 석탄회의 재활용성

나춘기,이무성,홍순강 木浦大學校 工業技術硏究所 1997 工業技術硏究誌 Vol.7 No.-

The purpose of this study is to examine the reusability of fly ashs produced by coal-fired power plants as an raw material in the manufacturing process of building resources such as brick, by investigating, in first, the mineralogical and chemical properties of raw materials including fly ashs of the Honam and the Samcheonpo thermal power plants and clay of the Hwangdeung area, and then examining the quility of pilot productions of fly ash-clay brick having various mixing proportions of fly ash. In general, the coal fly ashs separated in grain size under 200mesh and of Honam power plant have higher alkali contents but lower unburned carbon residues than those over 200mesh and of Samcheonpo power plant. This higher contents of alkali components such as CaO and Na2O and lower contents of unburned carbon have contributed to make dense structure in fly ahs-clay brick manufactured. Therefore, the clay brick manufactured by mixture of the Honam fly ash have more dence structure and much higher compressional strength than that of the Samcheonpo, and shows the trend of increasing the compressional strength from 1100-1300kg/㎠ to 170kg/㎠ with increasing the proportion of fly ash part from 10% to 50%. In contrast to Honam fly ash, the compressional strength of clay brick produced by the Samcheonpo fly ash decrease from 600-720kg/㎠ to 270-300kg/㎠ with increasing the mixing ratio of fly ash from 10% to 50%, due to high unburned carbon contents and low alkali contents of Samcheonpo fly ash.

다래나무 및 노각나무 수액의 성분조성

최선영,나성택,김용환,김행자,성낙주 경상대학교 농업생명과학연구원 2002 농업생명과학연구 Vol.36 No.2

본 실험에서는 다래나무 및 노각나무 수액을 천연 건강음료로 개발하기 위한 기초 자료를 얻고져 물리ㆍ화학적 성질과 유리당, 무기물 및 구성 아미노산 등을 분석하였다. 다래나무와 노각나무 수액의 pH, 비중, 당도, 수분, 회분 및 조단백질의 함량은 거의 비슷하였다. 유리당 함량은 fructose가 다래나무 수액에서 378.4㎎/100㎖, glucose는 노각나무 수액에서 125.4㎎/100㎖로 가장 높은 함량이었다. 무기물 조성은 망간과 알루미늄을 제외한 모든 무기물에서 노각나무 수액에 비해 다래나무 수액에서 함량이 높았으며 특히 칼슘은 다래나무 수액이 172.0㎎/ℓ, 노각나무 수액에서 13.7㎎/ℓ로 다래나무 수액이 노각나무 수액보다 약 13배나 높은 함량을 보였다. 다래나무 및 노각나무 수액은 분석된 총 17종의 구성 아미노산 중 다래나무 수액은 4종, 노각나무 수액에서는 6종이 검출되었는데, 다래나무 수액은 cystine, aspartic acid, serine 그리고 valine의 순으로 노각나무 수액에서는 cystine, glutamic acid, aspartic acid, serine, valine 및 phenylalanine 등의 순으로 함량이 높게 나타났다. Natural compounds such as free sugars, minerals and composition amino acids in Darae(Actinidia arguta) and Korean stewartia(Stewartia koreana) saps were analyzed to establish to the basic data of foods. Free sugars of the saps determined were fructose and glucose which were detected higher amounts as 378.4 and 125.4㎎/100㎖, respectively, but sucrose and maltose were not detected. Among 10 kinds of mineral detected in the saps, the content of calcium in Darae and aluminum in the Korean stewartia saps was the highest 172.0 and 56.1㎎/ℓ, respectively. The calcium content in Darae saps was 13 times higher than that of Korean stewartia saps. The Darae saps were composed of 4 kinds of amino acids such as cystine, aspartic acid, serine and valine, and then Korean stewartia saps 6 kinds of amino acids such as cystine, glutamic acid, aspartic acid, serine, valine and phenylalanine. It is concluded that saps of Darae and Korean stewartia contain a good variety of natural compounds such as free sugars, minerals and amino acids to serve as an excellent source of very natural and health promoting drinks.

전국 단위 감시체계의 현황과 전망

강성규,안연순,지영구,김형옥,하미나,권호장,백남종,김성아,홍윤철,김재용,강대희,정혜선,하은희 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.2

우리나라의 축산분뇨 발생 및 처리 현황

전병관,나성주,김선화 동신대학교 환경연구소 2004 환경연구 Vol.9 No.1

우리나라에서 사육되는 주요 가축들을 대상으로 하여 2000년부터 2003년까지 4년 동안 주요통계자료를 바탕으로 가축의 사육 두수와 배출량, 처리시설 현황 등을 분석한 결과 축산분뇨 발생은 대부분의 가축에서 2002년 이후 소폭 증가하였다. 2003년 기준으로 우리나라의 축산분뇨 공공처리 시설은 47개소이며 자원화가 가능한 처리시설은 20개소로써 이는 전체 처리시설의 42.6%밖에 되지 않는 실정이다. 따라서 자원화를 위한 신규 공공처리시설의 확충이나 기존 공공처리시설의 보강이 필요할 것으로 판단된다. 개별 축산시설의 경우 신규축산 농가와 사육두수를 늘리는 축산농가에 대해서는 반드시 분뇨분리 시설을 설치하도록 유도함으로써 점차적으로 분뇨분리 형태의 축사시설을 정착화 시켜야하며, 지역현황이 고려된 적정 축산두수의 유지와 소규모 축산농가들의 계획된 축산단지로 이전 또는 공동시설화해야 할 것이다. After, based on the major statistical data from year 2000 to 2003, the number of domestic livestock-breeding, the status of treatment plants, and the amount of livestock's waste generation had been analyzed, the amount of livestock's excretions generated were increased within narrow limits. At the basic year of 2003, the public treatment plant of livestock's excretions in Korea were 47 places and among them, only 20 plants(42.6%) could make excretions into resources. Therefore, an expansion of new public treatment plants and reinforcement of the existing plants must be needed. At the individual breeding facility, new stock farmhouse and farmhouse who expands the number of livestock must be induced to set up the livestock's waste treatment plant. Hence, gradationally, livestock's waste treatment plants should be installed widely, and the proper number of the livestock should be maintained under the considered status of an area. Also, Small scale stock farmhouses should move to planned complex and collaborate.

화포습지(경상남도 김해)의 관속식물상

임용석,나성태,마선미,신현철 순천향대학교 기초과학연구소 2004 순천향자연과학연구 논문집 Vol.10 No.2

The flora of vascular plants of wetland in Hwapo, Gimhae, Gyeongsangnam-do were investigated 3 times at 8 sites from 27 June 2001 to 13 September 2001. The flora was composed of 46 families,105 genera, and 136 taxa. Among them, the hydrophytes were confirmed as 29 taxa(21.3%), hygrophytes were 32 taxa(23.5), and terrestrial plants were 75 taxa(55.1%). Hydrophytes were composed of 15 taxa emergent hydrophytes, 5 taxa submerged hydrophytes, 4 taxa floating-leaved hydrophytes, and 3 taxa emergent hydrophytes. The dominant hydrophytes were Phragmites communis Trin. and Zizania latifolia Turcz.. The rare plants of Hydrocharis dubia (Blume) Backer, Rorippa globosa Thell., Trapella sinensis var. antennifera Hara., and Wolffia arrhiza (L.) Wimmer were colledted in these area.

현창늪(경상남도 창녕)의 관속식물상

임용석,마선미,나성태,신현철 순천향대학교 기초과학연구소 2004 순천향자연과학연구 논문집 Vol.10 No.2

The flora of vascular plants of wetland in Hyeonchang swamp, Changnyeong, Gyeongsangnam-do were investigated 3 times from 28 June 2001 to 14 September 2001. The flora was composed of 50 families, 93 genera, and 116 taxa. Among them, the hydrophytes were confirmed as 26 taxa(22.4%), hygrophytes were 34 taxa(29.3%), and terrestrial plants were 56 taxa(48.3)/ Hydrophytes were composed of 15 taxa emergent hydrphytes, 5 taxa submerged hydrphytes, 4 taxa floating-leaved hydrophytes, and 3 taxa free-floating hydrophytes. The dominant hydrophytes and hygrophytes were Phragmites communis Trin., Zizania latifolia Turcz., Miscanthus sacchariflorus Benth., and Persicaria maackiana Nakai. The naturalized plants were colledted 6 taxa.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

Successful Removal of Endobronchial Lipoma by Flexible Bronchoscopy Using Electrosurgical Snare

Seong Cheol Yun,Moon Jun Na,Eu Gene Choi,Sun Jung Kwon,Seong Ju Lee,Sun Hee Oh,Eun Jung Cha,Ji Woong Son 대한결핵 및 호흡기학회 2013 Tuberculosis and Respiratory Diseases Vol.74 No.2

A 62-year-old man with a chronic cough presented with atelectasis of the left upper lobe on chest X-ray. Chest computed tomography showed an atelectasis in the left upper lobe with bronchial wall thickening, stenosis, dilatation, and mucoid impaction. We performed bronchoscopy and found a well-circumscribed mass on the left upper lobe bronchus. The mass was removed by flexible bronchoscopy using an electrosurgical snare and diagnosed with lipoma. An endobronchial lipoma is a rare benign tumor that can be treated by a surgical or endoscopic approach. We report the successful removal of endobronchial lipoma via flexible bronchoscopic electrosurgical snare.

Changes of Seed Quality of Chinese Milk Vetch(Astragalus sinicus L.) During Seed Developmental Stages

Na, Chae-Sun,Lee, Yong-Ho,Hong, Sun-Hee,Jang, Cheol-Seong,Kang, Byeung-Hoa,Lee, Jong-Ki,Kim, Tae-Ho,Kim, Wook The Korean Society of Crop Science 2007 한국작물학회지 Vol.52 No.4

The objective of this study was to investigate the variation of Chinese milk vetch(Astragalus sinicus L.; CMV) seed quality after flowering. We tagged individual open flowers of CMV at the day of maximum flowering(11 May) in Seoul, Korea. Seed samples were harvested serially at 15, 20, 25 and 30 days after flowering(DAF). To compare with dried seeds, non-dried seeds were tested immediately after harvest and the remaining seeds were placed at room temperature for 4 weeks. Seed length, 1000 seed weight, moisture content, germination rate(GR), mean germination time(MGT), germination speed(GS), germination performance index(GPI) and physical dormancy rate(PDR) were investigated. Seed length increased to 2.6 mm and 1000 seed weight reached up to 2.2 g until 25 DAF. Seed moisture content dramatically decreased from 20 to 25 DAF. Moisture content of non-dried seed(7.5%) was similar to that of dried seed(5.5%) at 25 DAF. The rate of seed viability reached up to 94% at 25 DAF. In case of dried seed, GR increased up to 39% at 25 DAF whereas GR of non-dried seed varied from 5 to 10%. GS and GPI of dried seed were significantly higher than those of non-dried seed since 25 DAF. PDR of dried seed has decreased since 20 DAF, whereas PDR of non-dried seed has increased. GR, GS and GPI increased as PDR decreased. Our results evidenced that PDR might be one of major factor in variation of seed quality, of which development was completed at 25 DAF.

Changes of Seed Quality of Chinese Milk Vetch (Astragalus sinicus L.) During Seed Developmental Stages

Chae Sun Na,Yong Ho Lee,Sun Hee Hong,Cheol Seong Jang,Byeung Hoa Kang,Jong Ki Lee,Tae-Ho Kim,Wook Kim 韓國作物學會 2007 한국작물학회지 Vol.52 No.4

The objective of this study was to investigate the variation of Chinese milk vetch(Astragalus sinicus L.; CMV) seed quality after flowering. We tagged individual open flowers of CMV at the day of maximum flowering(11 May) in Seoul, Korea. Seed samples were harvested serially at 15, 20, 25 and 30 days after flowering(DAF). To compare with dried seeds, non-dried seeds were tested immediately after harvest and the remaining seeds were placed at room temperature for 4 weeks. Seed length, 1000 seed weight, moisture content, germination rate(GR), mean germination time(MGT), germination speed(GS), germination performance index(GPI) and physical dormancy rate(PDR) were investigated. Seed length increased to 2.6 mm and 1000 seed weight reached up to 2.2 g until 25 DAF. Seed moisture content dramatically decreased from 20 to 25 DAF. Moisture content of non-dried seed(7.5%) was similar to that of dried seed(5.5%) at 25 DAF. The rate of seed viability reached up to 94% at 25 DAF. In case of dried seed, GR increased up to 39% at 25 DAF whereas GR of non-dried seed varied from 5 to 10%. GS and GPI of dried seed were significantly higher than those of non-dried seed since 25 DAF. PDR of dried seed has decreased since 20 DAF, whereas PDR of non-dried seed has increased. GR, GS and GPI increased as PDR decreased. Our results evidenced that PDR might be one of major factor in variation of seed quality, of which development was completed at 25 DAF.