오차드그라스의 예취빈도에 따른 무기태질소의 단기시용 효과

조익환,이용세,전하준 대구대학교 과학기술연구소 1998 科學技術硏究 Vol.5 No.2

A study was made to estimate the economic level(Necon.) of mineral nitrogen and a proper cutting frequency for the dry matter production of Orchardgrass (Dactlyis glomerata L.) during the harvested years in 1993∼1995. Annual mineral nitrogen was applied at the levels of 0, 90, 180, 270 and 360 kg ha^(-1) in 3 cuttings, 0, 120, 240. 360 and 480 kg ha^(-1) in 4 cuttings, and 0. 150. 300. 450 and 600 kg ha^(-1) in 5 cuttings, respectively. The dry matter yields of all cutting frequencies in 1993 were significantly higher than in the other harvested years. Mean dry matter yield were 13.1, 12.7 and 14.3 tons ha-1 in 3, 4 and 5 cuttings, respectively. Higher efficiencies of dry matter production in response to mineral nitrogen application were recorded as 12.9 kg at level of 360 kg ha^(-1) yr-1 in 3 cuttings. 27.3 kg at level of 240 kg ha-1 yr^(-1) in 4 cuttings, and 20.5 kg at level of 150 kg ha-1 yr-1 in 5 cuttings, respectively. Significantly higher dry matter yields appeared as 4.6 tons ha-1 at 1st cut in 3 cuttings, 3.7 tons and 4.1 tons ha^(-1) at 2nd cut in 4 and 5 cuttings, respectively. The estimated marginal dry matter yields(Ymar.) were 11.7∼12.3 tons ha^(-1) at ranges of economic N level of 285.5∼316.6 kg ha^(-1) yr^(-1) in 3 cuttings, 10.4∼10.5 tons ha-1 at ranges of 176.7∼196.6 kg ha^(-1) yr^(-1) in 4 cuttings, and 11.2∼11.6 tons ha^(-1) at ranges of 246.1∼286.0 kg ha^(-1) yr^(-1) in 5 cuttings, respectively. Maximun dry matter yields(Ymax.) were 14.3 tons at the level of limiting N(Nmax.) of 379.5 kg ha^(-1) yr^(-1) in 3 cuttings. 11.1 ton at level of limiting N of 298.4 kg ha^(-1) yr^(-1) in 4 cuttings, and 12.3 ton at level of limiting N of 467.7 kg ha^(-1) yr^(-1) in 5 cuttings, respectively. Economic N level in all cuts were in the ranges of 85.1∼116.1 kg ha^(-1) cut^(-1) in 3 cuttings, 31.3∼69.7 kg ha^(-1) cut^(-1) in 4 cuttings, and 30.8∼81.4 kg ha^(-1) cut^(-1) in 5 cuttings, respectively.

Bloodstream Infections and Clinical Significance of Healthcare-associated Bacteremia: A Multicenter Surveillance Study in Korean Hospitals

Son, Jun Seong,Song, Jae-Hoon,Ko, Kwan Soo,Yeom, Joon Sup,Ki, Hyun Kyun,Kim, Shin-Woo,Chang, Hyun-Ha,Ryu, Seong Yeol,Kim, Yeon-Sook,Jung, Sook-In,Shin, Sang Yop,Oh, Hee Bok,Lee, Yeong Seon,Chung, Doo The Korean Academy of Medical Sciences 2010 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.25 No.7

<P>Recent changes in healthcare systems have changed the epidemiologic paradigms in many infectious fields including bloodstream infection (BSI). We compared clinical characteristics of community-acquired (CA), hospital-acquired (HA), and healthcare-associated (HCA) BSI. We performed a prospective nationwide multicenter surveillance study from 9 university hospitals in Korea. Total 1,605 blood isolates were collected from 2006 to 2007, and 1,144 isolates were considered true pathogens. HA-BSI accounted for 48.8%, CA-BSI for 33.2%, and HCA-BSI for 18.0%. HA-BSI and HCA-BSI were more likely to have severe comorbidities. <I>Escherichia coli</I> was the most common isolate in CA-BSI (47.1%) and HCA-BSI (27.2%). In contrast, <I>Staphylococcus aureus</I> (15.2%), coagulase-negative <I>Staphylococcus</I> (15.1%) were the common isolates in HA-BSI. The rate of appropriate empiric antimicrobial therapy was the highest in CA-BSI (89.0%) followed by HCA-BSI (76.4%), and HA-BSI (75.0%). The 30-day mortality rate was the highest in HA-BSI (23.0%) followed by HCA-BSI (18.4%), and CA-BSI (10.2%). High Pitt score and inappropriate empirical antibiotic therapy were the independent risk factors for mortality by multivariate analysis. In conclusion, the present data suggest that clinical features, outcome, and microbiologic features of causative pathogens vary by origin of BSI. Especially, HCA-BSI shows unique clinical characteristics, which should be considered a distinct category for more appropriate antibiotic treatment.</P>

예취빈도에 따른 질소시비가 오차드 그라스의 영양가와 양분수량에 미치는 영향

조익환,전하준,김민 대구대학교 과학기술연구소 1999 科學技術硏究 Vol.6 No.2

This experiment was carried out to investigated the effects of levels of mineral nitrogen under various cutting systems on the nutritive value and nutrient yields of orchardgrass (Dactylis glomerata L.) during harvested years in 1993-1995. The contents of crude protein (CP), total digestible nutrients (TDN), relative feed value (RFV) and annual nutrient yields in relatively wet year (1993) were significantly higher than those in the other harvested years, but the tendency of contents of acid detergent fiber (ADF) and neutral detergent fiber (NDF) were against. The contents of CP, TDN, RFV of all cutting frequencies were highest at the last cut, but lowest at the 2nd cut. The annual nutrient yields were highest at the 1 st cut in 3 cuttings, and at the 2nd cut in 4 and 5 cuttings, respectively. Significantly higher contents of CP in all cutting frequencies appeared in according to increase the levels of mineral nitrogen, but the contents of ADF were lower with nitrogen fertilization of 60 kg ha^(-1) cut^(-1) in 4 and 5 cuttings than those in non-fertilized plots. Higher efficiencies of dry matter production (kg DMY kg^(-1) N), crude protein production (kg CPY kg^(-1) N) and total digestible nutrients production (kg TDNY kg^(-1) N) in response to mineral nitrogen fertilization were recorded as 12.9, 1.4 and 7.6 kg at level of 360 kg ha^(-1) in 3 cuttings, 27.3. 2.7 and 16.0 kg at level of 120 kg ha^(-1) in 4 cuttings, 20.5, 2.0 and 12.7 kg at level of 360 k, ha^(-1) in 5 cuttings, respectively. In all treatments, negative correlation between CP and ADF or NDF appeared (P<0.001). Positive correlations were recorded between CP and TDN or RFV. and among TDN and nutrient yields (P<0.01).

몬순기후와 복잡지형의 특성을 갖는 광릉 산림유역의 물과 탄소순환에 대한 교차규모 연구로부터의 교훈

이동호 ( Dong Ho Lee ),김준 ( Joon Kim ),김수진 ( Su Jin Kim ),문상기 ( Sang Ki Moon ),이재석 ( Jae Seok Lee ),임종환 ( Jong Hwan Lim ),손요환 ( Yo Whan Son ),강신규 ( Sin Kyu Kang ),김상현 ( Sang Hyun Kim ),김경하 ( Kyong Ha Kim 한국농림기상학회 2007 한국농림기상학회지 Vol.9 No.2

광릉 슈퍼사이트에서 대기와 식생간의 에너지와 물질교환 규명은 지형과 식생의 복잡성으로 인해 많은 기술적인 어려움에 직면하고 있다. 따라서 KoFlux 연구에서는 상호보완적인 다중 분야의 연구를 통해 이러한 어려움을 극복하기 위한 시도를 해 오고 있다. 본 논문에서는 현재 진행중인 KoFlux 연구의 예비결과 중 특히 광릉사이트에서의 물/탄소수지, 물과 탄소순환의 상호관련성 그리고 몬순기후하의 생태계에서 탄소순환에 미치는 수문학적 요인의 중요성에 대해 중점적으로 논의하고자 한다. 광릉낙엽활엽수림의 순생태생산량 (NEP)은 광범위한 생태학적 연구결과에 따르면 약 ~2.6 t C/ha/y로 예상된다. 이를 미기상 플럭스 관측 결과와 함께 고려할 때 광릉 산림은 탄소의 중요한 육상흡원으로서 기능함을 예상할 수 있다. 다양한 생태수문 관측에 의해 규명된 유역단위 물수지에 의하면 연단위 전체강수량의 약 30-40%가 증발산 (ET)에 해당함을 나타내고 있다. 광릉산림의 대표적인 수종인 졸참과 서어나무의 잎에서 얻어진 탄소 안정동위 원소 조성에 근거하여 계산된 식물 성장기간의 평균 물 이용효율(WUE)은 약 ~12 μmol CO2/mmol H2O에 해당된다. 얻어진 증발산량과 물이용효율은 유역단위의 생태계 생산량을 산출하는데 이용될 수 있다. 나이테 성장량과 토양호흡량의 연단위 변화는 강수량과 강수의 패턴에 의해 크게 영향을 받음을 보이고, 이는 몬순기후에 영향을 받는 동아시아 지역 생태계에서 탄소 순환과정이 수문학적 조건과 밀접한 상관관계를 가짐을 지시한다. 연구지역의 공간적 특성을 정량화하기 위해 관측지의 구조 및 기능적 단위를 규명하기 위한 연구가 진행되고 있고 이를 통해 서로 다른 시공간 규모에서 진행되고 있는 연구의 결과물을 체계적으로 연결 통합하고 나아가 보다 광역적인 규모에서 대표적인 물/탄소 수지를 산출하기 위한 연구가 시도되고 있다. KoFlux Gwangneung Supersite comprises complex topography and diverse vegetation types (and structures), which necessitate complementary multi-disciplinary measurements to understand energy and matter exchange. Here, we report the results of this ongoing research with special focuses on carbon/water budgets in Gwangneung forest, implications of inter-dependency between water and carbon cycles, and the importance of hydrology in carbon cycling under monsoon climate. Comprehensive biometric and chamber measurements indicated the mean annual net ecosystem productivity (NEP) of this forest to be ~2.6 t C ha-1 y-1. In conjunction with the tower flux measurement, the preliminary carbon budget suggests the Gwangneung forest to be an important sink for atmospheric CO2. The catchment scale water budget indicated that 30~40% of annual precipitation was apportioned to evapotranspiration (ET). The growing season average of the water use efficiency (WUE), determined from leaf carbon isotope ratios of representative tree species, was about 12 μmol CO2/mmol H2O with noticeable seasonal variations. Such information on ET and WUE can be used to constrain the catchment scale carbon uptake. Inter-annual variations in tree ring growth and soil respiration rates correlated with the magnitude and the pattern of precipitation during the growing season, which requires further investigation of the effect of a monsoon climate on the catchment carbon cycle. Additionally, we examine whether structural and functional units exist in this catchment by characterizing the spatial heterogeneity of the study site, which will provide the linkage between different spatial and temporal scale measurements.

만성 요통이 여성의 골밀도와체간근력에 미치는 영향

박준용,하상배 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.5

비기능성 부신피질암 1례

하달봉,이경섭,손형규,이준희,원유홍,김동훈,장태정 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

비기능성 부신피질암은 발생 빈도가 극히 드문 악성 종양이며, 내분비학적 임상증상이 없어 주로 복부 종물에 의해 우연히 발견된다. 그래서 대부분 종양의 크기가 거대하고 전이로 진행된 경우가 흔하며, 절제술만으로는 치유 불가능한 경우가 많아 예후가 불량한다. 최근 저자들은 약 10년간 간헐적인 좌측 측복통과 흉부 압박감으로 내원하여, 이학적 검사 및 방사선학적 검사상 복부 종물이 확인되고 생화학적 검사에서 비기능성으로 판명된 52세 남자 환자에서 근치적 신절제술을 시행하여 병리조직검사상 비기능성 부신피질암으로 진단되었기에 문헌 고찰과 함께 보고하는 바이다. Nonfunctioning adrenocortical carcinoma is extremely rare, which is diagnosed most often in older man because of mass effect. Most tumors are discovered too late for curative resection, and advanced tumors are associated with a poor prognosis. Herein we report on a 52-year-old man with nonfunctioning adrenocortical carcinoma, treated by radical nephrectomy.

송화분을 이용한 간기능 증진제 개발 연구

하은주,이해경,한준표 대구효성가톨릭대학교 1993 연구논문집 Vol.47 No.1

To investigate the effect of the pine pollen on serum and liver of rat pretreated with carbon tetrachloride. Rats were first administrated CCl₄and then treated orally with the water-washed pine pollen as indicated in the book of "Imperial courtcookery" The results are summarized as follows ; GPT activity of rat administrated the pine pollen was lower than that of rat treated with CCl₄to induce a chronic liver injury and was similar to that of nontreatment group. Totla cholesterol in serum of pine pollen administrated rat decreased significantly compared with that of the CCl₄-treated group. There was a noticeable improvement in the activity of the live protein synthesis of pine polllen-administrated rat, compared with that of CCl₄-treated group. Body weight of non-treated group are increased but that of CCl₄-treated and pine pollen-treated group were retarded according to time.

여성에서 체간 근력이 골밀도에 미치는 영향

박준용,하상배 大韓再活醫學會 1998 Annals of Rehabilitation Medicine Vol.22 No.6

人工酸性비가 大豆와 고추의 葉被害率과 葉綠素 含量에 미치는 影響

전하준,백준호 대구대학교 과학기술연구소 1996 科學技術硏究 Vol.3 No.2

This study was conducted to investigate the relationships between the responses of soybean and red pepper to simulated acid rain, the simulated acid rain(SAR) of pH 1.8, 2.3 and normal rain of pH 6.0 applied from 30 days after emergence of soybean and red pepper to harvest at the two-week interval. SAR of pH 1.8 and 2.3 caused brown spots in the Ieaves of soybean and red pepper and the injured rates were severe as the pH of SAR lowered. Chlorophyll content of soybean and red pepper decreased as the pH of SAR lowered. Visual injured rate affected by simulated acid rain treated 3 times were negatively correlated with chlorophyll content of soybean and red pepper.

中國歷代 釋奠儀禮의 史的 考察

趙駿河 東洋哲學硏究會 1999 東洋哲學硏究 Vol.20 No.-