중부지역 옥수수 파종기에 따른 생육단계 및 수량성 변화

서종호, 문중경, 정건호, 서민정, 구자환, 박장환, 배환희, 신성휴, 권영업 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

Maize hybrids were planted on April 1, April 25, May 20 and June 15 in 2012, 2013 at the experimental paddy and upland fields in Suwon city , respectively to know changes of growth stage and yield according to different planting time. Maize planting on April 1 was not recommended because total growing days at planting on April 1 was not different with that at planting on April 25 due to many days from planting to emergence over 20 days at planting on April 1. Total growing days were not much different among three planting time after April 25 because days from silking to maturity was lengthened though days from planting to silking was shortened at later planting time. Stalk weight was decreased as planting time was delayed, particularly at planting times after May 20 at paddy field by excess water injury during early growth stage. But, grain yield was not low as in May and June. It is needed to introduce early maturity maize variety as Yanganok at late planting for higher grain yield and enough time for soil preparation for next winter crops

硏究論文 : 국지적으로 분포하는 식물에 대한 기후 및 환경변수 영향

권혁수 ( Hyu Ksoo Kwon ),류지은 ( Ji Eun Ryu ),서창완 ( Chang Wan Seo ),김지연 ( Ji Yeon Kim ),도재화 ( Jae Hwa Tho ),서민환 ( Min Hwan Suh ),박종화 ( Chong Hwa Park ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2012 한국환경복원기술학회지 Vol.15 No.6

Climate is generally accepted as one of the major determinants of plants distribution. Plants are sensitive to bioclimates, and local variations of climate determine habitats of plants. The purpose of this paper is to identify the factors affecting the distribution of narrow-range plants in South Korea using National Survey of Natural Environment data. We developed species distribution models for 6 plant species using climate, topographic and soil factors. All 6 plants were most sensitive to climatic factors but less other factors at national scale. Meliosma myriantha, Stewartia koreana and Eurya japonica, distributed at southern and coast region in Korea, were most sensitive to precipitation and temperature. Meliosma myriantha was mostly effected by annual precipitation and precipitation of driest quarter, Stewartia koreana was effected by annual precipitation and elevation, and Eurya japonica was affected by temperature seasonality and precipitation of driest quarter. On the other hand, Spiraea salicifolia, Rhododendron micranthum and Acer tegmentosum, distributed at central and northern inland in Korea, were most sensitive to temperature and elevation. Spiraea salicifolia was affected by mean temperature of coldest quarter and annual mean temperature, Rhododendron micranthum and Acer tegmentosum were affected by mean temperature of warmest quarter and elevation. We can apply this result to future plant habitat distribution under climate change.

Development of vitrification protocol in Rubia akane (nakai) hairy roots using a systematic approach.

Park, Sang-Un,Kong, Hyunjung,Shin, Dong-Jin,Bae, Chang-Hwan,Lee, Sheong-Chun,Bae, Chang-Hyu,Rha, Eui-Shik,Kim, Haeng-Hoon Royal Veterinary College 2014 Cryo letters Vol.35 No.2

<P>A solution-based vitrification protocol is a process of sequentially changing-solutions from which both influx of cryoprotectants (loading) and efflux of water (dehydration) were accomplished before cryo-exposure. Hence, we need to properly control the concentration /composition of the cryoprotectant solutions.</P>

6LoWPAN을 위한 단편 패킷의 저전력 멀티홉 전송 기법

김일휴,남영진,김 창 훈 대구대학교 정보통신연구소 2010 情報通信硏究 Vol.7 No.1

The fragmentation and reassembly of IP data packet is one of the most important function in the 6LoWPAN based communication between Internet and wireless sensor network. However, since the 6LoWPAN determines the destination node with 16-bits or 64-bits address, it increases the number of fragmentation and reassembly. In order to reduce the number of fragmentation and reassembly, this paper presents a new scheme that can be applicable to 6LoWPAN. When a fragmented packet header is constructed, we can have more space for data. This is because we use 8-bits routing table ID instead of 16-bits or 64-bits MAC address to decide the destination node. Analysis shows that our design has roughly 7% or 22% less transmission number of fragmented packets, depending on MAC address size(16-bits or 64-bits), compared with the previously proposed scheme in RFC4944. The reduced fragmented packet transmission means a low power consumption since the packet transmission is the very high power function in wireless sensor networks. Therefore the presented fragmented transmission scheme is well suited for low-power wireless sensor networks. 6LoWPAN 프로토콜의 주요 기능 중 단편과 재조합의 기능은 무선 센서네트워크와 인터넷간의 데이터 전송을 가능하게 하는 가장 중요한 기능이다. 그러나 6LoWPAN에서는 IP 패킷의 단편화시 16-비트 혹은 64-비트의 주소로서 목적지를 판단하기 때문에 데이터 패킷을 위한 공간이 부족하여 단편 및 재조합의 횟수를 증가 시킨다. 본 논문에서는 6LoWPAN상에서 데이터의 단편 횟수를 줄일 수 있는 새로운 기법을 제안한다. 제안된 기법은 단편 패킷 헤더 구성 시 주소가 아닌 8-비트 라우팅 테이블 Id를 사용함으로써 데이터 저장을 위한 더 많은 공간을 확보 할 수 있다. UTRC-SN110 센서 노드를 이용한 실험 결과 기존 RFC4944에서 제안된 단편 패킷 전송 방식과 비교 분석한 결과 16-비트 주소방식보다 약 7%, 64-비트 주소방식보다 약 22%의 전송 횟수 감소를 보인다. 무선 센서노드에서 패킷의 전송은 많은 전력을 소모하기 때문에 패킷 전송횟수의 감소는 전력 소모량의 감소를 의미한다. 따라서 본 논문에서 제안한 단편 패킷 전송기법은 에너지 사용량이 중요한 무선 센서네트워크 응용에 적합하다 할 수 있다.

인천지역 한 대학병원에서 진단된 기관지천식 중 직업관련성 천식

채창호,진영우,김은아,최승원,강성규,최용휴 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.2

Bronchial Asthma could be developed by occupational origin. 4-16% of bronchial asthmas are known to be related to occupational exposure. However, occupational asthma has not been reported from the periodic occupational health examination, but reported through case report from clinicians. The authors analysed hospital records to find out work-related bronchial asthma and their occupational characteristics at a university hospital in Inchon. All records which were confirmed as bronchial asthma in adult by an allegist from June, 1996 to May, 1998 were selected. Through record reviewing, any suspected work related asthma was selected and the inteview was done by phone or at the out-patient clinic. The possible cases were confirmed by additional tests including specific bronchial provocation test. Sixteen(3.9%) out of 411 bronchial asthma were confirmed as work-related asthma. Eight cases out of 16 worked at furniture industry, three worked at dye manufacturing and two worked at musical instrument manufacturing industry. Others worked at farm and machinary industry. The confirmed asthmogen were toluene diisocyante(8), reactive dye(3), and grain dust(1). None of the cases was detected as work-related asthma in the periodic health examination. Twelve out of sixteen occupational asthma patients discontinued their work. The results suggested that many patients with occupational asthma were not reported and the periodic health examination was not an effective system for detecting the workrelated asthma. Thus setting up the surveillance system involving allergist or pulmonologist would be important to detect and prevent occupational asthma.

등척성 신전운동 시 요부근의 근 활성도

유원규,정영종,이재호,김창인 한국전문물리치료학회 2001 한국전문물리치료학회지 Vol.8 No.1

Back extension exercises have been used for rehabilitation of the injured low back, prevention of injury, and fitness training programs. However, excessive loading on low back can exacerbate existing structural weakness. The purpose of this study was to compare muscle activity of low back muscles during back extension exercises. Twenty healthy male subjects were evaluated, Electromyographic (EMG) activities of low back muscles at L1 and L5 level were recorded during seven different back extension exercises and two reference tasks by surface EMG and saved for data analysis. Reference tasks of lifting 20% and 40% of their body weight were included for comparison. The result were as follows: 1) Single-arm extension and single-leg extension exercises on quadruped position appeared to constitute a low-risk exercise for initial extensor strengthening. 2) When arm extension was combined with contralateral leg extension on quadruped position, EMG activities of low back muscles were increased, 3) EMG activity of low back muscles was highest during the trunk extension exercises on prone position. 4) EMG activities of low back muscles during arm and leg extension exercises on quadruped position were less than those of reference task of lifting 40% of their body weight. These results have important implications for progressive back extensor muscle

중이온 빔 조사에 의한 담배의 돌연변이 유도와 내염성 식물의 선발

배창휴,Abe, Tomoko,민경수,김동철,정재성,이춘환,임용표,이효연 충남대학교 생물공학연구소 1999 생물공학연구지 Vol.7 No.-

중이온 빔을 이용한 방사선 돌연변이의 기초자료를 얻고자 담배의 수분·수정 직후의 원배에 100 Gy의 중이온빔을 조사하여 M_1세대의 종자를 얻었다. NaCI 2.0과 2.5%를 포함된 MS배지에 M_1 세대의 종자를 파종하여 17개통의 NaCI 저항성 식물체를 선발하였다. 저항성 식물체는 BY-4품종에 ^14N빔을 조사한 처리구에서만 관찰되었다. M_1 세대의 저항성 식물체의 경우 영양생장기간 중에는 외형적 변이가 관찰되지 않았으나 생식생장기의 화기에 있어서는 다양한 변이가 관찰되었다. 특히 암술 수술의 길이의 변화, 꽃잎의 변화, 불완전 화분립, 줄기당 꽃의 착생수 감소 등의 변이가 발생하였다. M_1 세대에서 17개의 NaCI저항성 계통 중에서 8계통은 M_2 세대에도 저항성형질이 발현되었고, 또한 M_2 세대의 3계통은 Mannitol이 포함된 배지에서 저항성을 보여주었다. Tobacco proembryos were irradiated with 100 Gy of heavy-ion beams (^14N, ^20Ne : 135 Mev/u) after 24 to 96 hours of pollination as a mutagen and screened M_1 generation for morphological mutants and salt-tolerant plants. Morphological and physilolgical characteristics of the salt-tolerant plants derived from the irradiated proembryo are discussed in this report. Mutants irradiated porembryos with the beams after pollination produced various kinds of morphological variation. A total of 17 salt-tolerant plants were selected from tobacco cultivar (BY-4) by treatment with ^14N beam. Shapes of filament and pollen grain of most salt-tolerant plants were abnormal compared with non-irradiated wild type, and seeds weight and fertility obviously decreased. The germination rates of the several M_2 lines on the saline and the mannitol condition were higher than that of wild type.

Effects of LED Light Illumination on Germination, Growth and Anthocyanin Content of Dandelion (Taraxacum officinale)

Ryu, Jai Hyunk,Seo, Kyoung Sun,Choi, Gab Lim,Rha, Eui Shik,Lee, Sheong Chun,Choi, Seong Kyu,Kang, Si-Yong,Bae, Chang-Hyu The Plant Resources Society of Korea 2012 한국자원식물학회지 Vol.25 No.6

Dandelion has been widely utilized for medicinal and edible purposes. This research was conducted to evaluate the effect of supplemental LED (light-emitting diode) light on germination, growth characteristics and anthocyanin content of dandelion (Taraxacum officinale) seedling using LED blue (460 nm), red (660 nm, R), blue + red (B:R=6:4) and fluorescent lamp light treatment. By LED illumination to T. officinale seed germination speed was delayed, and germination rate was the highest in the fluorescent light. The growth characteristics (plant height, number of leaves, root length and fresh weight) were greatly influenced by supplemental LED light compared with control treatment, and the growth promotion was the most effective in the red LED illumination. After 60 days of red and mixed LED light treatments, anthocyanin content of dandelion plants was significantly changed. The anthocyanin content was increased by 12~19 mg/100 g under the red LED and the mixed light conditions compared with the control and the blue LED. Results indicate that illumination with red and mix LEDs, compared with other light treatments, is beneficial for promotion of growth and anthocyanin content in dandelion.

Incorporation Effect of Green Manure Crops on Improvement of Soil Environment on Saemangeum Reclaimed Land during Silage Corn Cultivation

Chang-Hyu Yang,Jang-Hee Lee,Nan-Hyun Baek,Pyeong Shin,Kwang-Min Cho,Sang-Bok Lee,Gyeong-Bo Lee 한국토양비료학회 2013 한국토양비료학회지 Vol.46 No.3

This study was carried out to investigate the incorporation effect of green manure crops (GMC) such as the hairy vetch on improvement of soil environment in reclaimed land during silage corn cultivation over the past two years. Plots consisted of conventional fertilization (CF) and incorporation of GMC were divided by addition rate of nitrogen fertilizer (100 kg ha<SUP>-1</SUP>) with 30 ? 100% of non nitrogen fertilization (NNF). Soil physico-chemical properties and growth and yield potential of silage corn were examined. The tested soils showed strong alkali and saline properties with low contents of organic matter and available phosphate while contents of exchangeable sodium and magnesium were high. Soil salinity increased during cultivation of summer crop. However, corn was not affected by salt content. The fresh weight of GMC at incorporation time was 18,345 kg ha<SUP>-1</SUP>. Content of total nitrogen was 3.09% and the C/N ratio was 12.8 at incorporation time. Fresh and dry matter yield of silage corn were higher in the order of N30% reduction, CF, N50% reduction, N70% reduction, N100% reduction and NNF. Fresh and dry matter yield potential of silage corn for N30% reduction were comparable to those of CF. Bulk density of the soil decreased with incorporation of GMC, while porosity was increased. The soil pH decreased while content of exchangeable calcium, available phosphate, and organic matter increased. Also contents of exchangeable sodium and potassium decreased with incorporation of GMC. The data indicate that incorporation of hairy vetch can improve soil physical and chemical properties and reduce nitrogen fertilizer application especially for alkali saline reclaimed soil such as Saemangeum reclaimed land.

Study of Characteristics on Nitrogen Mineralization in Organic Fertilizers

Chang-Hyu Yang(양창휴),Taek-Kyum Kim(김택겸),Jin-Hee Ryu(유진희),Ji-Ho Jeong(정지호),Snag-Bok Lee(이상복),Chul-Hyun Yoo(류철현),Jae-Duck Kim(김재덕),Ui-Gum Kang(강위금) 한국토양비료학회 2008 한국토양비료학회 학술발표회 초록집 Vol.2008 No.9