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감자의 4x×2x 종간교잡 후대 식물체의 배수성 차이에 따른 氣孔細胞의 量的形質 變化와 반수체식물 선발효과
Hyun Mook Cho(趙賢默),Hei Young Kim-Lee(金惠英),Il Gin Mok(睦一振) 한국육종학회 1994 한국육종학회지 Vol.26 No.1
To select haploids from the progeny plants obtained by interploidal and interspecific crosses of potatoes, stomatal cell characters were examined at three different growth stages as a potential indicator of ploidy level. The mean stomatal cell densities were 66.9, 45.0 and 38.5 per unit area(34 ㎛²) in haploid, triploid and tetraploid plants, respectively. The length and width of stomata were 27.5 : 18.8㎛, 34.3 : 21.0㎛ and 36.5 : 22.0㎛ in haploid, triploid and tetraploid plants, respectively. These characters had significant differences between ploidy levels with in the progeny plants but had relatively large quantitative variation within ploidy levels. On the other hand, the number of chloroplasts in a pair of guard cells, having the mean of 12.2, 18.4 and 20.2 in haploid, triploid and tetraploid plants, respectively, had large differences between ploidy levels with narrow variation within a ploidy level. These results indicated that counting chroloplasts in the guard cells among stomatal cell characters could be adopted as a rapid and accurate method for identifying haploids from large number of progeny plants of interploidal and interspecific crosses.
조현길(Hyun-Kil Cho),이은웅(Eung-Woong Lee),김준호(Jun-Ho Kim),정종호(Jong-Ho Jeong),김일중(Il-Jung Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
To investigate a arc behavior when the flux density linking arc current is different, two kinds of models having the different flux density with each other are proposed. Calculations of the flux density and the electromagnetic force acting on arc column using finite element method is described in this paper. And, arc behavior photographs by the high speed camera are illustrated at breaking DC 100V, 100A on the resistance load. So, the arc driving forces are compared with according to the arc types.
임신 초기 3차원 초음파로 양막대를 확인한 뇌없음증이 동반된 양막대 증후군 증례
조현진 ( Hyun Jin Cho ),김연미 ( Yeon Mee Kim ),전균호 ( Gyun Ho Jeon ),전성욱 ( Sung Wook Chun ),정철회 ( Chul Hoi Jeong ),지용일 ( Yong Il Ji ) 대한산부인과학회 2011 Obstetrics & Gynecology Science Vol.54 No.3
Amniotic band syndrome (ABS) is entrapment of fetal parts by disrupted amnion and formation of fibrous amniotic band. As results, it causes a variety of fetal malformation involving the limbs, the craniofacial region and trunk. A visualization of free floating amniotic band is appropriate diagnostic method for ABS. Three dimensional (3D) and four dimensional (4D) ultrasounds are useful to diagnosis ABS. However prenatal diagnosis is difficult especially when they do not circulate a limb or cause single abnormality. In the cases of anencephaly, a differentiation between ABS and primary neural tube defect is important because the recurrence rate is significantly different. We reported a case that a fetal anencephaly with hydrops was diagnosed using prenatal 3D and 4D ultrasound then confirmed as amniotic band syndrome by autopsy at 12 weeks of gestation. After autopsy, we demonstrated amniotic band through 3D ultrasound review.
조현일 ( Hyun Il Cho ),조성윤 ( Song Yun Cho ),김영미 ( Young Mi Kim ),전동주 ( Dong Ju Jeon ),김은경 ( Eun Kyoung Kim ) 한국화상학회 2002 한국화상학회지 Vol.8 No.1
광변색 디아릴에텐 유도체의 형광특성에 관해서 조사하였다. 디아릴에텐 유도체는 1,2-비스(2-메틸벤조[b]티오펜-3-일)헥사플루오르시클로펜텐 (BTF6)을 출발 물질로 하여 6,6’의 위치에 극성 작용기를 도입함으로서 합성하였다. 이러한 유도체의 색은 자외선 단파장(325nm)을 조사하면 붉은색으로 변화되고 다시 가시광선을 조사함으로서 무색으로 소색되었다. 광변색성의 고리화 반응과 디아릴에텐 유도체의 형광특성은 방향족고리에 치환된 치환체에 의해서 영향을 받았다. 형광수율은 광변색 효율이 낮은 디아릴에텐 유도체에서 높게 나타났다. 이는 디아릴에텐의 형광은 여기된 parallel 이성체로부터 기인한다는 것을 의미한다. Fluorescence property of photochromic diarylethene derivatives was investigated. The diarylethene derivatives were synthesized by attaching polar groups to 6, 6`-positirn of 1,2-bis(2-methylberuo[b]thiophene-3-yl )hehexafluorocyclopentene(BTF6). The color of the diarylethene derivatives was changed to red upon excitation with a ultraviolet light(325 nm) and disappeared by irradiation with a visible(λ>500nm) light. Photochromic cyclization reactions and fluorscence properties of the diarylethene derivatives were influenced by the substituent in the aryl group. High fluorescene quantum yield was observed in the diarylethene derivative having low photochromic quantum yield, indicating that fluorescence originates from the exited state of a parallel isomer.
임신 3삼분기 산전진찰에서 발견된 선천성 횡격막 탈장에 동반된 선천성 흉강내 신장
조현진 ( Hyun Jin Cho ),남소현 ( So Hyun Nam ),전성욱 ( Sung Wook Chun ),정철회 ( Chul Hoi Jeong ),지용일 ( Yong Il Ji ),전균호 ( Gyun Ho Jeon ),박병섭 ( Byung Seob Park ) 대한산부인과학회 2012 Obstetrics & Gynecology Science Vol.55 No.12
Congenital thoracic kidney is a rare congenital malformation, caused by renal malpositioning during embryogenesis or congenital diaphregmatic hernia with herniation of kidney. Prenatal diagnosis of congenital thoracic kidney has been only rarely reported, underlying congenital diaphragmatic hernia should always be suspected in cases of congenital thoracic kidney. We present a case in which the prenatal diagnosis of an ectopic intrathoracic kidney was made on routine anatomical survey at 29 weeks` gestation.
조현진 ( Hyun Jin Cho ),전균호 ( Gyun Ho Jeon ),전성욱 ( Sung Wook Chun ),정철회 ( Chul Hoi Jeong ),지용일 ( Yong Il Ji ) 대한산부인과학회 2011 Obstetrics & Gynecology Science Vol.54 No.5
The Septic shock is a major cause of maternal death during pregnancy which has a great influence on the fetal state. Septic abortion is the representative cause. However, there are many different causes or unknown causes as well. As soon as the diagnosis of septicemia, it should be treated immediately and aggressively. According to the gestational age and fetal condition such as fetal distress, the delivery time should be decided. This case is of a mother who suffered from septic shock at the 23rdweek of the pregnancy. The cause of the septicemia could not be found in this case, but the patient was able to recover through early aggressive treatment. The fetus was in a favorable condition so the patient was able to give birth to the baby in full-term after recovering from sepsis.
單位生殖에 의한 감자 半數體植物 誘起 Ⅲ. 色素遺傳子 發現樣相에 따른 半數體植物 選拔
Hyun Mook Cho(趙賢默),Hei Young Kim Lee(金惠英),Il Gin Mok(睦一振) 한국육종학회 1993 한국육종학회지 Vol.25 No.1
Interspecific and Interploidal crosses were made between tetraploids and diploids to induce potato haploids. Tetraploids female parents were grouped into three different types according to the pigments on the stem. Pigments on seeds, seedlings and mature plants were used as phenotyphic markers to select haploids. Haploids were derived only from non-embryo spot seeds from all of the three types of the female parents. The positive selection for non-pigmented plants at seed and seedling stage was highly accurate to select haploid in the progenies of the female parents with green stem (group G), except the cv. Russet Burbank. Most of seedlings with white hypocotyl in the progenies of female parents with basal purple(group BP) or whole purple stem(group P), were haploids. However, 45.5% and 69.5% of the seedlings with white-purple hypocotyl derived from these groups were haploids, respectively. Because of the matroclinous effect of their female parents on plant pigmentation, the negative selection for purple pigmented plants at seed, seedling, growth and subsequently, harvest stage, was effective. As a consequence, a two step selection method was applicable for group BP and P ; select the seedlings with only white hypocotyl at seedling stage as haploids, and discard all the plants with purple pigments on the hypocotyl, stem and tuber skin according to gradual plant growth. Up to now, from 1,253 of non-embryo spot seeds, 199 haploid plants were confirmed by the phenotypic markers and subsequently root-tip chromosome counting. The efficiency of haploid induction through interspecific and interploidal crosses was affected by different tetraploids female parents.