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남산의 소나무림, 신갈나무림, 아까시나무림의 낙엽생산과 토양유기탄소 동태
정헌모 ( Heon Mo Jeong ),김해란 ( Hae Ran Kim ),신동훈 ( Dong Hoon Shin ),이경미 ( Kyoung Mi Lee ),이승혁 ( Seung Hyuk Lee ),한영섭 ( Young Sub Han ),장래하 ( Rae Ha Jang ),이상경 ( Sang Kyeong Lee ),김태규 ( Tae Kyu Kim ),유영한 한국환경생물학회 2013 환경생물 : 환경생물학회지 Vol.31 No.2
남산의 소나무림, 신갈나무림 그리고 아까시나무림에서 2008년 1월부터 2009년 12월까지의 월별 낙엽생산량과 토양의 유기탄소량을 조사하였다. 소나무림은 2008년과 2009년 모두 10월에 낙엽생산량이 가장 많았으며, 2008년 1월과 2009년 12월에 낙엽생산량이 가장 적었다. 신갈나무림은 2008년과 2009년 모두 11월에 낙엽생산량이 가장 많았으며, 2월에 낙엽생산량이 가장 적었다. 아까시나무림은 2008년 11월과 2009년 10월에 낙엽생산량이 가장 많았으며, 2008년 1월과 2009년 12월에 낙엽생산량이 가장 적었다. 이것은 한반도 중부에서 상록성의 소나무림이 낙엽성의 참나무숲 보다 더 일찍 낙엽이 진다는 것을 의미한다. 소나무림과 신갈나무림, 아까시나무림의 2년 평균의 낙엽생산량은 7.07, 6.36, 5.02 ton ha-1로 소나무가 가장 많았다. 소나무림과 신갈나무림, 아까시나무림의 2년 평균의 토양유기탄소량은 76.2, 68.6, 72.5 ton C ha-1로 소나무림에서 가장 많았다. 이처럼 소나무숲에서 높게 나타난 것은 남산에서 신갈나무나 아까시나무를 벌목하여 임목밀도가 줄었기 때문이다. The objective of this study was to estimate dynamics of litter production and soil organic carbon of Pinus densiflora forest, Quercus mongolica forest, and Rhobina pseudo-acasia forest at Mt. Nam as a part of Korea National Long-Term Ecological Research (KNLTER) from 2008 to 2009. Litter production of P. densiflora forest was the highest in October 2008, 2009 and the lowest in January 2008 and December 2009. Litter production of Q. mongolica forest was the highest in November and the lowest in February in 2008 and 2009. Litter production of R. pseudo-acacia forest was the highest in November in 2008 and October in 2009 and the lowest in January in 2008 and December in 2009. It means that leaves of P. densiflora forest shed earlier than deciduous oak forests in Korean central region. An average of litter production for 2 years was 7.07, 6.36, 4.66 ton ha-1 in P. densiflora forest, Q. mongolica forest, R. psuedo-acacia forest, respectively. An average of soil organic carbon matter for 2 years was 88.3, 76.5, 84.2 ton ha-1 in P. densiflora forest, Q. mongolica forest, R. psuedo-acacia forest, respectively.
Activator를 이용한 소아의 하악과두골절의 치험례 : A CASE PEPORT
이정화,박현동,이상호,이난영 大韓小兒齒科學會 2003 大韓小兒齒科學會誌 Vol.30 No.3
하악 과두부는 하악골에서 자주 발생하는 골절부위 중의 하나로 특히, 하악골의 성장이 완성되지 않은 소아의 경우 하악과 두골절이 적절히 치료되지 않으면 안면 기형, 악관절 강직증, 부정교합, 그리고 하악골 발육이상 등을 초래할 수 있다. 소아에서의 하악과두골절의 치료목적은 동통없이 악기능을 정상적으로 회복시켜 악안면골의 성장발육을 정상적으로 유도하는 것이다. 치료방법의 선택은 환자의 나이, 골절된 위치, 골절부위의 이물질의 유무 등에 의해 이루어지나 소아의 경우 가능한 한 비수술적, 기능적 치료가 선호된다. 본 증레에서는 activator를 이용한 하악과두골절의 기능적 요법을 시행하고 골절부위의 기능적 재형성을 유도하면서 10개월간 관찰해 본 결과, 골절 부위의 동통 감소, 정상적 교합관계의 회복, 최대개구량의 증가, 하악의 편위 감소 등의 기능적 회복을 보였고 특이한 자각증상을 보이지 않았다. 소아에서 하악과두골절의 처치법으로 activtor를 이용한 기능적 치료는 동통없이 악기능을 회복시키고, 정상적인 교합관계로 유도할 수 있을 것으로 사료된다. The pediatric condylar fracture occurs very frequently in the mandible, but this injury is occasionally ignored due to difficulty of diagnosis and no cooperation of patient. The adequate initial diagnosis and active treatment must be performed because delayed and improper treatment lead to possible severe complication such as TMJ ankylosis and reta of mandibular development. Most pediatric condylar fracture is mainly performed by the conservative or functional treatment, but it may be required open reduction according to cases. In this study, activator is applied for functional treatment of pediatric condylar frature and fair recovery of jaw function is acquired.
Low Power Pixel-Level ADC Readout Circuit for an Amorphous Silicon-Based Microbolometer
HA, Dong-Heon,HWANG, Chi Ho,LEE, Yong Soo,LEE, Hee Chul The Institute of Electronics, Information and Comm 2009 IEICE transactions on electronics Vol.92 No.5
<P>A new readout integrated circuit is developed for application in an amorphous silicon-based microbolometer array with a pixel pitch of 35µm. The proposed circuit lowers the power dissipation for a pixel-level analog-to-digital converter (ADC), which uses a comparator and a counter for its data conversion. The infrared current of a microbolometer is proportional to the resistivity changes of the microbolometer. Thus, the required number of counter operations for the pixel ADC can be determined according to the microbolometer current variation. The counting number precisely determines how much infrared flux is absorbed. A 14bit counter should normally be used for the pixel ADC for this kind of operation. However, when the proposed current skimming scheme is adopted, the total bits for the counter in the pixel ADC can be reduced to 12bits. Due to the proposed mechanism, the required operational speed of the comparator can lower than that of a conventional circuit. Consequently, the overall power dissipation in the comparator and counter is less than that of a conventional structure. This low power approach is very suitable in the pixel-level ADCs of microbolometers.</P>
서동석(Dong-Seok Seo),김재영(Jae-Young Kim),정재황(Jae-Hwang Jeong),박학수(Hak-Soo Bark),유욱준(Wook-Joon Yu),고상범(Sang-Beom Go),김정헌(Jeong-Heon Kim),장동혁(Dong-Hyouk Jang),서무엽(Mu-Yeb Seo),조빈행(Bin-Haing Cho),성하정(Ha-Jung 한국농약과학회 2003 농약과학회지 Vol.7 No.4
To investigate the toxicological effects of technical of IAP-3006, we performed subchronic oral toxicity study in Sprague-Dawley (SD) rats. In the subchronic dietary study, rats of both sexes were fed diets containing technical of IAP-3006 at concentrations of 0, 1000, 10,000, or 15,000 ppm for 90 days. No clinical signs and mortality were observed in animals treated with technical of IAP-3006 throughout the experimental period. There were also no significant changes in body weights, feed consumption, and any gross or histopathological lesions. Although there were statistically significant differences between the control and treated groups in some relative and absolute organ weights, and hematological and biochemical analyses, the data were in biologically normal ranges and did not show a dose-dependent manner. From these results, it is suggested that subchronic oral toxicity NOEL of technical of IAP-3006 in rats may be over 15,000 ppm.
Optimization of leaf water loss rate assay for rapid and stable drought tolerance screening in rice
Tae-Heon Kim,Soo-Kwon Park,Woon-Ha Hwang,Jong-Hee Lee,Sang-Ik Han,Jun-Hyun Cho,You-Chun Song,Min-Hee Nam,Dong-Soo Park,Dong-Jin Shin 한국육종학회 2014 한국육종학회 심포지엄 Vol.2014 No.07
The global rice reduction due to drought averages 18 Mt, especially, 23 Mha of rice fields in Asia are drought-prone. However, rice breeding programs focusing on drought resistance have made little progress to date. Because proper screening approaches with large scale were not developed to evaluate the drought tolerant degree. In here, we have developed of leaf water loss rate with plastic ware in dark conditions for large screening. Through this bioassay system, we examined drought phenotype degrees of 650 rice varieties. To validate whether this optimized bioassay system is corelated with drought phenotype, we chose 14 varieties having the lowest or highest of the water loss rate. We observed the visual drought phenotype and agricultural traits in green house and field conditions. Apo and Samgang having the lowest of leaf water loss rate showed drought tolerance phenotype, whereas Yeolbaeg and Milyang254 having the highest of leaf water loss rate showed drought sensitive phenotype. Apo displayed proper root length trait and Samgang showed good root dry trait in the greenhouse conditions. These results suggest that a simple screening procedure with water lose rate of leaves is effective to perform large scale screening for drought phenotype in rice.
Analysis of QTLs for vegetative stage drought tolerance using DH population in rice
Tae-Heon Kim,Soo-Kwon Park,Woon-Ha Hwang,Jong-Hee Lee,Sang-Ik Han,Jun-Hyun Cho,You-Chun Song,Min-Hee Nam,Dong-Soo Park,Dong-Jin Shin 한국육종학회 2014 한국육종학회 심포지엄 Vol.2014 No.07
Drought is a one of the most serious abiotic stresses limiting rice production. However, little progress has been made in the genetic analysis of drought tolerance, because it is a complex trait controlled by a number of genes and affected by various environmental factors. The most efficient method for drought tolerance breeding is using drought tolerance genetic resources. We used a doubled-haploid (DH) population consist of 101 lines derived from a cross the drought tolerant cultivar ‘Samgang’ and the drought sensitive cultivar ‘Nagdong’ for QTL analysis. Drought stress was treated by withholding water for 6 weeks, and then rewatered for 7 days. After rewatering visual phenotype was observed according to the standard evaluation system for rice, IRRI. Drought sensitive parent ‘Nagdong’ was almost died, while tolerant parent ‘Samgang’ showed slightly leaf tip dring phenotype. The qdr11 detected on chromosome 11 with flanking markers RM26755-RM287 and accounted for 19% phenotype variation with a LOD score of 3.7.