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정진철,윤영호,장동칠,박천수,김숭열 한국환경농학회 2003 한국환경농학회지 Vol.22 No.4
감자의 가공품질에 영향을 미치는 토양 및 기상조건을 구명하기 위하여 국내 주요 감자재배 지역 7곳에 1994년부터 1995년까지 2년에 걸쳐 각 지역별 2~3개 농가에서 감자를 재배하였으며, 각 재배포장의 토양시료 채취 및 괴경을 수확하였다. 지역별 감자 괴경의 가공품질 차이의 원인을 구명키 위하여 토양분석과 수확일 기준으로 수확전 70~10일 사이의 기상조건을 10일 간격으로 조사하였으며, 수확된 괴경의 가공품질과 이들 요인과의 상관계수를 계산하였다. 시험결과 감자의 가공품질은 토양의 화학적 특성 중에서 토양내 유기물함량과 높은 상관계수를 보였다. 또한 기상조건과 관련하여 수확전 30~10일 사이의 최저온도가 낮으며, 일조시간이 많을수록 감자의 가공품질이 향상되었다. 또한 이들 상관관계가 높은 요인들을 대상으로 가공품질 요인에 대한 다중회귀식을 구한 결과 괴경건물율과 칩색도는 비교적 높은 결정계수를 보여주었다. 따라서 우리나라에서 고품질의 가공원료 생산을 위한 적지 선정에 있어 토양중의 유기물 함량과 그 지역의 최저온도 및 일조시간 둥이 고려되어야 할 것으로 생각된다. In order to examine the difference in processing quality of potato tubers among localities, chemical properties of soils were analyzed and climatic conditions were investigated. potatoes (Solanum tuberosum L) were grow at seven localities of Korea during two years from 1994 to 1995. Soil samples and tubers were obtained from 2 to 3 commercial farms per locality with 10 days interval from 70 days before harvesting. As the result of that, higher correlation in processing quality was found with organic material content among soil conditions. On the climatic conditions, minimum temperature and sunshine hours during the period from 30 to 11 days before harvesting exhibited highly significant negative correlations with all quality parameters except reducing sugar content. Additionally, regression equations based on the observed level of these factors showed the relatively high coefficients of determination for dry matter content and chip color. To produce higher quality potatoes for processing, therefore, climatic conditions such as minimum temperature and sunshine hour and soil condition such as organic matter content have to be considered before the selection of areas or fields.
전방 십자인대의 파열시의 자기공명영상:직접소견의 중요성
신현준,이창희,최영칠,전혜정,박정희,김동헌 건국대학교 의과학연구소 2001 건국의과학학술지 Vol.11 No.-
It is Important to know the normal size, shape, and signal intensity of anterior cruciate ligament in the evaluation of knee injury Many studies have reported findings of tear or rupture as well as normal anatomy of these structure, especially with MR images. To our knowledge, there are few studies about normal structures of anterior cruciate ligament in MR images. The purpose of this study is to compare normal finding with tear of anterior cruciate ligament on MRI. Twenty-three cases with rupture of anterior cruciate ligament were evaluated on MRI, measuring the length, thickness, width of anterior cruciate ligament, and angles of anterior and posterior cruciate ligaments. Mean length, thickness, and width of anterior cruciate ligament in patients with rupture were 37.7±4.8mm, 9.0±1.2mm, 8.0±0.8mm, and mean angles of anterior cruciate ligament, and posterior cruciate ligament were 48.1±9.6˚, 118.8±13.1˚. Curvature ratio of posterior cruciate ligament was 0.25±0.09. The results showed significant differences between normal persons and patients with complete or partial rupture, and the mean angle and curvature ratio of posterior cruciate ligament which are known to related with indirect sign in tear of anterior cruciate ligament showed significant differences between ours and that of western countries. These results will be useful in the evaluation of patient wish rupture of anterior cruciate ligament, especially on MRI.
Chang, Dong Chil,Jin, Yong Ik,Nam, Jung Hwan,Cheon, Chung Gi,Cho, Ji Hong,Kim, Su Jeong,Yu, Hong-Seob Elsevier 2018 Field crops research Vol.215 No.-
<P><B>Abstract</B></P> <P>The morphological growth characteristics of shoots, stolons, and tubers were measured on potatoes (<I>Solanum tuberosum</I> L.) grown in irrigation and drought from plant emergence. Three cultivars with a wide range of seasonal maturing patterns, Chubaek (very early), Superior (medium-early), and Jayoung (late), were used. The drought was maintained up to the tuberization stage in the year 2015, and it was extended to early tuber bulking in the year 2016. The drought delayed the time to full canopy development by 2–6days and decreased the growths of shoots in terms of stem length, stem thickness, number of stems, and fresh weight of the shoots. The harvest index was increased in all cultivars due to the decreased shoot growth. The early drought also increased the length of underground stolons. However, the decreases in stem thickness and stem number and the increases in harvest index and stolon length were only significant in the year 2016. Even though the drought did not affect tuberization in early and medium-early cultivars, it decreased early tuber growth by suppressing the longitudinal growth expressed by the ratio of length to width of the tubers. The decrease of tuber growth was observed until the end of the season with the exception of Superior in 2016. In late maturing cultivar, tuber initiation and tuber yield were dependent on the season or length (severity) of the drought. In 2016 when late cultivar, Jayoung, experienced a long drought starting from the emergence of the plants to early tuber bulking, the drought induced earlier tuberization than irrigation treatment, and showed a higher harvest index than in 2015. The early tuberization and tuber bulking due to the long drought induced increased tuber yields. The occurrence of second growth tubers was highly attributed to the maturity of cultivars in both years and the drought in 2016.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Early drought delayed the canopy development of potato plants through decreased growth of shoots such as stem length and fresh weights of shoots. </LI> <LI> Even though drought did not affect tuberization in early and medium-early cultivars, it decreased yield by suppressing longitudinal growth of tubers. </LI> <LI> In late maturing cultivar, tuber initiation and tuber yield were dependent on the length (severity) of the drought. </LI> <LI> Drought induced higher incidence of second growth tubers in early maturing cultivar when the drought period was long and followed by rainfall. </LI> </UL> </P>