Effect of the foliar application of selenium on selenium content of whole- crop barley

In-Bea Choi,Jung-Joon Lee,Jae-Hwan Nho,Kwang-Min Cho,Sang-Kyun Cho,Tai-Il Park,Hyeong-Ho Park,Tae-Hwa Song,Kee-Jong Kim,Ik-Hwan Jo 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07

A field experiment was conducted to evaluate the varietal variation of Se concentration and to determine the effects of selenium foliar applications on the productivity and agronomic characteristics of the whole-crop barleys. Se fertilizer was foliar applied at five levels(0, 50, 100, 200, 400 ppm) and two forms (sodium selenite and sodium selenate solution) at stem elongation stage, the middle of April. Cultivar effects on whole-plant Se contents were small and not significant. Regardless treatments, there were no remarkable effects on dry matter yield and forage quality of whole crop barleys. Se contents of plant was higher in selenate application by 3~10 times than selenite. In selenate treatments, as Se levels were raised from 50 ppm to 400ppm the Se contents were increased from 331ppb to 3433ppb and Se contents were positively correlated with the rate of Se application levels. Selenium(Se) is an essential nutritional trace element, which is needed for growth and reproduction in all living animals. But the line between the requirement and harmfulness of Se is narrow since selenium is a highly toxic element. The level of Se in feeds of plant varies depending on plant species, growing season and soil which the plants grow on. Because of low concentration of Se in domestic soils, the selenium availability to plants is limited and it is necessary to supplement feed with selenium. Generally organic Se is less toxic and more efficiently utilized than inorganic Se. Under the condition that antibiotics use in feed are prohibited, selenium enriched whole-crop barley can be one way to improve animal health.

승용차의 부분부하제어를 위한 스크류형 과급기 개발

배재일,배신철,Bea, Jae-Il,Bae, Sin-Chul 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.10

Turbo- or Super-charging has been used to boost engine power for Gasoline- and Diesel Engine since beginning of 20th century. So far turbo-charger has enjoyed a high reputation in the charging field for its technical advantages such as no demand of operation power from engine and an excellent charging effect in a static operation at mid- and high engine speed. A mechanically driven super-charger, however, is now popular due to the high engine power at quick change of the driving mode - high engine torque even at low engine speed. Since super-charger needs operation power from engine, it is difficult to improve its relatively higher fuel consumption than that of turbo-charger. This negative point is still an obstacle to the wide use of supercharger. Super-charger using screw-type compressor will fulfill the purpose to reduce fuel consumption by minimizing operation power owing to no charge at idling or part load driving condition. This study aims to develop power control concept to achieve the minimization of operation power. A screw type super-charger was modified in design partially and installed with an internal bypass valve and a bypass tube to control charging pressure at part load. The various control concepts show a possibility to reduce operation power of super-charger.

셀레늄의 엽면시비가 총체보리의 생육 및 셀레늄 흡수에 미치는 영향

최인배 ( In Bea Choi ),김경훈 ( Kyeong Hun Kim ),김상민 ( Sang Min Kim ),김양길 ( Yang Kil Kim ),이미자 ( Mi Ja Lee ),박태일 ( Tae Il Park ),김경호 ( Kyung Ho Kim ),최재성 ( Jae Seong Choi ),박광근 ( Kwang Geun Park ),한옥규 ( Ouk 전북대학교 농업과학기술연구소 2014 농업생명과학연구 Vol.45 No.2

겨울철 사료 작물인 청보리을 대상으로 국내 토양의 특성상 부족하기 쉬운 셀레늄을 엽면시비하여 청보리의 생육 및 사료가치와 셀레늄 함량 등을 조사하였고, 청보리 품종별 셀레늄 흡수능의 차이를 알아보았다. 셀레늄을 4월 중순에 50에서 400ppm까지 농도를 높여 엽면시비한 결과 출수기 등 생육이나 수량, 사료가치에는 대조구와 유의한 차이가 없었다.셀레늄 화합물에 따라 식물체에 흡수되는 정도가 달랐는데 농도를 달리하여 처리하였을 때 selenite 시험구에서는 건물내 셀레늄 함량이 0.12~0.28ppm이었으나 selenate 시험구에서는 0.33~3.43ppm 으로 selenate 형태의 셀레늄 화합물이 엽면시비에 더 적합한 것으로 조사되었다. selenate 수용액을 50g/ha의 농도로 엽면시비한 시험구의 수확 후 건물 내 셀레늄 함량은 0.34ppm으로 가축 사료의 적정 셀레늄 함량인 0.1~0.3ppm에 가장 근접하였다. 또한 청보리 품종에 따른 셀레늄 흡수능력 차이는 적은 것으로 조사돼 셀레늄이 강화된 청보리 생산을 위해서는 조사료생산량과 가축의 기호성 등을 고려하여 적정 품종을 선택하여 재배할 수 있을 것으로 생각된다. A field experiment was conducted to evaluate the effects of foliar application type and dosage of selenium on the productivity, feed quality and selenium concentration of whole crop barley. Whole crop barley ‘Youngyang’ and other cultivars were applied selenium as foliar spray from two different selenium compounds(sodium selenite and sodium selenate) and at four different level, 50, 100, 200, 400 ppm at the stem elongation stage(the middle of April). The forage productivity and feeding quality of ‘Youngyang’ was not affected by selenium types and dosage. Selenium content in dry matter was 3~10 times higher when Se was applied in the form of sodium selenate than sodium selenite at the same selenium level and it shows the selenate form is more effective. When selenate 50 ppm was applied as foliar spray, selenium concentration in ‘Youngyang’ was 0.34 ppm and this is regarded the suitable treatment to satisfy the recommended selenium concentration(0.1~0.3 Se mg/Kg) in animal feed. The absorption of Se among whole crop barley varieties were not different and ‘Youngyang’, ‘Yuyeon’, ‘Uho’, ‘Yuho’ are recommended for selenium enriched whole corp barley because of their stable productivity and higher palatability.

호흡 변이도의 최신 연구 동향

김선애 ( Seon Ae Kim ),박성일 ( Seung Il Park ),박영배 ( Young Bea Park ),박영재 ( Young Jae Park ) 대한한방신경정신과학회 2016 동의신경정신과학회지 Vol.27 No.2

Objectives: In human, there is a diversity in the breathing pattern, for instance inspiratory and expiratory time, volume, breathing frequency, and breath-to-breath variation. Expecially, respiratory variability can provide important information about breathing regulation and physiological flexibility. it is significant to not only breathing index but also physiological index. Methods: Thus this paper reviews the literature on respiratory variability with the aim of clinical application. Results: We could find the interrelationships and respiratory variability between emotions, psychopathy, sighing, mental and physical activity. Conclusions: As a result, respiratory variability can serve an important physiological index in the clinical area and reflects how our bodies act in diverse environments under various condition.

연구보문 : 자연과학 ; 동계 사료용 맥류와 하계 사료용 옥수수 작부체계 연구

조상균 ( Sang Kyun Cho ),조광민 ( Kwang Min Cho ),박태일 ( Tae Il Park ),박형호 ( Hyeong Ho Park ),노재환 ( Jae Hwan Roh ),최인배 ( In Bea Choi ),오영진 ( Young Jin Oh ),송태화 ( Tae Hwa Song ),김기종 ( Kee Jong Kim ),박기훈 ( Ki 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.3

This experiment was carried out for two years from 2010 to 2011 in Kimjae city to provide basis of ``Winter forage crop-Summer forage corn`` cultivation system in southern area of Korea. The cultivars tested were ``Gokwoo`` as rye, ``Kumgang`` as wheat and ``Youngyang`` as barley as winter forage crops and ``Kwangpyeongok`` as corn for the summer forage crop. Regarding to winter forage crops, biomass of rye in fresh weight was 301.4 ton/ha and its income indicated 1,841 thousands Korean Won (KRW)/ha, an increase of 141% compared to naked barley grain production(NBGP). Biomass of barley was 30.6 ton/ha and the income showed 3,151 thousand KRW/ha, an increase of 242% compared to NBGP. Biomass of wheat recorded as 40.5 ton/ha with the most productive result among three winter forage crops and the income was 3,740 thousand KRW/ha, meaning 287% increase in comparison with NBGP. Regarding to summer forage corn cultivation, biomass production after rye was 56.7ton/ha in fresh weight and its income gained 4,731 thousand KRW/ha with an increase of 88% compared to single cropping rice(SCR). Biomass after barley produced 51.4ton/ha and the income was 3,828 thousand KRW/ha, showing a increase of 71% compared SCR. Biomass after wheat recorded as 31.0 ton/ha with the lowest productivity among three summer forage cultivations after each winter forage crops and the income of 372 thousand KRW/ha, an increase of 7% in comparison with SCR. With regard to total roughage production of each winter-summer forage crop combinations, total biomass production of ryecorn system was 87.1 ton/ha and the income recorded 6,572 thousand KRW/ha, similar to that of NBGP plus SCR. Biomass of barley-corn system produced 87.4ton/ha and the income was 6,979 thousand KRW/ha, a 105%-rise over that of NBGP plus SCR. Biomass of wheat-corn system recorded 71.6 ton/ha with the lowest result among three winter-summer forage corp combinations and the income of 4,112 thousand KRW/ha with an growth of 62% in comparsion with that of NBGP plus SCR.

소형수조에서 음향재료의 반향음감소와 투과손실 측정시스템 구성

신미루,조정홍,이경택,김재수,전재진,함일배,강창기,Shin, Mi-Ru,Cho, Jung-Hong,Lee, Kyung-Teak,Kim, Jea-Soo,Jeon, Jae-Jin,Ham, Il-Bea,Kang, Chang-Gi 한국음향학회 2011 韓國音響學會誌 Vol.30 No.2

Since the detection probability is critically dependent on the target strength (TS) in active sonar and on the radiated noise level (RNL) in passive sonar, the acoustic materials for echo reduction (ER) and transmission loss (TL) are widely used for the stealth of underwater targets. In this paper, a measurement system based on the small water tank, for the frequency range of greater than 30 kHz, is developed and verified using reference targets. In order to design the water tank and the geometry of test samples, a program is developed to calculate the arrival time of interfering signals due to the reflection from water tank walls and also due to the diffraction from the edge of the test samples. Considering all the interfering signals, an optimal experimental configuration for water tank and test samples is designed and used throughout the experiment. Next, the signal processing algorithms to estimate ER and TL are developed based on the measured propagation loss reflecting the geometric spreading characteristics of the transducer. Finally, a set of reference targets such as aluminium plate and perfectly reflecting plate are used in a small water tank to verify the developed measurement system. 본 논문은 반향음과 투과음을 감소시키기 위한 평판형 음향재료의 성능평가 장치를 제작하고 측정시스템을 구성하며 표준표적을 이용한 검증을 통해 신뢰성을 확보하는 데 목적이 있다. 반향음감소와 투과손실 측정은 신호간섭이 없도록 대형수조에서 실시되는 것이 일반적이지만, 본 논문에서는 신호간섭을 고려해야 하는 소형수조에서 최저 30 kHz까지 측정이 가능한 측정시스템을 구성하였다. 이를 위해 신호모의를 통해 신호간섭이 없는 최적의 기하학적 배치를 도출하였으며, 획득한 신호를 시간영역과 주파수영역의 총 네 가지 방법으로 ER과 TL을 도출하는 신호처리 알고리즘을 확립하였다. 마지막으로 대형수조에서의 전파손실 실측실험을 통해 측정시스템을 보정하고 알루미늄 판과 스티로폼을 표준표적으로 사용한 측정결과를 Brekhovskikh Layer Model과 비교하여 측정시스템 검증을 수행하였다.