http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 손영환 (검색결과 204 건)
- 무료
- 기관 내 무료
- 유료
-
發光박테리아 Vibrio fischeri를 利用한 有害物質의 生物學的 毒性評價
손영환,이희무,류재근,유홍일 한국환경독성학회 1994 환경독성보건학회지 Vol.9 No.2
This study was performed to determine the aquatic toxicity (EC_(50), 30min) on luminescent bacteria Vibrio fischeri of heavy metals, pesticide, and another toxic materials. 1. EC_(50) of heavy metals on Vibrio fischeri was mercury 0.62mg/l, cadmium 5.94mg/l, lead 1.53mg/l, chromium 4.28mg/l, and Cu 11.09mg/l. 2. EC_(50) of organophosphate pesticide Diazinon was 4.50, and parathion 2.67mg/l. 3. EC_(50) of Arsenic, was 4.78 cyanide phenol, 5.03, 14.77mg/l. 4. The toxic materials with low EC_(50) on V. fischeri and high inhibition increase rate according to the increase of material concentration were Hg, 2.4-D. The ones with low EC_(50) and low inhibition increase rate were Pb, Parathion, Endosulfan. The ones with high EC_(50) and high inhibition increase rate were Cr^(6+), Diazinon, As, CN, Cd. The one Phenol showed high EC_(50) and low inhibition increase rate.
-
-
Fall cone을 이용한 풍화토의 풍화도 측정(실트질 모래에 대하여)
손영환,장병욱,김성필 한국농공학회 2008 한국농공학회논문집 Vol.50 No.1
It is essential to analyze and classify the physical characteristics of weathered granite for engineering purposes. This paper is to suggest a physical method to determine the degree of weathering of weathered soils. A new classification method for determining the degree of weathering is suggested, based upon the results from laboratory tests including fall cone test.According to the proposed physical method using fall cone apparatus, the measured values of the samples from the same area show distinctive difference of weathering. The water content tends to increase with increasing the degree of weathering at the same penetration in fall cone test. And relationship between CWI and water content are expressed one equation in Whasung area and Ilsan area.
-
Breakage Index of Weathered Soil Reflecting Breakage Level and Weathering Degree
손영환,장병욱 대한토목학회 2009 KSCE JOURNAL OF CIVIL ENGINEERING Vol.13 No.5
The particle of weathered soil is easily broken by stress, which is significantly influenced by environments and field conditions. In addition, the degree of weathering of soil leads to the change of the breakage level of the soil and the strength parameters of its structure. In this research, breakage level of disturbed weathered soil in each condition of compaction was monitored and then analyzed using a compaction test, X-ray Fluorescence Spectroscopy (XRF), sieve analysis test, Scanning Electron Microscope (SEM), and direct shear test. These analyzed results indicate that the key grain size contributing to the breakage level is changed in accordance with the water content of a compaction test. Consequently, with the key grain size a new breakage index is proposed to evaluate breakage levels of the weathered soil specimens. This index not only evaluates the degree of weathering but also identifies the breakage level in this experiment. The particle of weathered soil is easily broken by stress, which is significantly influenced by environments and field conditions. In addition, the degree of weathering of soil leads to the change of the breakage level of the soil and the strength parameters of its structure. In this research, breakage level of disturbed weathered soil in each condition of compaction was monitored and then analyzed using a compaction test, X-ray Fluorescence Spectroscopy (XRF), sieve analysis test, Scanning Electron Microscope (SEM), and direct shear test. These analyzed results indicate that the key grain size contributing to the breakage level is changed in accordance with the water content of a compaction test. Consequently, with the key grain size a new breakage index is proposed to evaluate breakage levels of the weathered soil specimens. This index not only evaluates the degree of weathering but also identifies the breakage level in this experiment.
-
-
-
수은과 비소로 오염된 시료의 측정주파수와 농도 변화에 따른 전기적 특성
손영환,봉태호,장병욱,Son, Young-Hwan,Bong, Tae-Ho,Chang, Pyoung-Wuck 한국농공학회 2008 한국농공학회논문집 Vol.50 No.6
In general, ground pollution can be classified with soil pollution and underground water pollution. And ground pollution contaminates the land with garbage dumps and other harmful waste products as heavy metals that can also eventually enter our water supply. This study was conducted to define a characteristics of the electrical resistivity and the permittivity of weathered soil that was contaminated with heavy metals as Mercury and Arsenic. It is not easy whether contamination of soil as subsurface contamination is decided or not and at an early stage especially do that. Therefore the electrical resistivity and the permittivity were used to make up for this defects. These methods are more economical and more effective than the existing methods. And variation of the electrical resistivity and the permittivity values were found against the change of concentration of Mercury and Arsenic aqueous solutions and measuring frequency. These analyzed results indicate that the electrical resistivity and the permittivity tend to decrease against increasing measuring frequency. The electrical resistivity and the permittivity are also found to show the function of frequency.
-
-
Fall Cone을 이용한 풍화도 측정(실트질 모래에 대하여)
손영환,김성필,장병욱,Son, Young-Hwan,Kim, Seong-Pil,Chang, Pyoung-Wuck 한국농공학회 2008 한국농공학회논문집 Vol.50 No.1
It is essential to analyze and classify the physical characteristics of weathered granite for engineering purposes. This paper is to suggest a physical method to determine the degree of weathering of weathered soils. A new classification method for determining the degree of weathering is suggested, based upon the results from laboratory tests including fall cone test. According to the proposed physical method using fall cone apparatus, the measured values of the samples from the same area show distinctive difference of weathering. The water content tends to increase with increasing the degree of weathering at the same penetration in fall cone test. And relationship between CWI and water content are expressed one equation in Hwaseong area and Ilsan area.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
