• KOREAN JOURNAL OF CROP SCIENCE
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• v.42 no.2
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• pp.129-133
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• 1997

A total 943 accession of soybeans (G. max) and 50 wild soybeans (G. soja) were examined for leucine aminopeptidase (LAP) isozyme variation by 5％ polyacrylamide gel electrophoresis(PAGE) and isoelectric focusing(IEF) of pH 4~6.5. The Lap1*b by PAGE was the most common phenotype in both G. max and G. soja. The frequency of Lap1*b allele was observed to be higher in G. max(1.00) than in G. soja(0.96) of Korea. This result shows that G. max is fixed for Lapl*b allele at the Lap1 locus. LAP isozyme band type I and II were found using IEF of pH 4~6.5 in G. max and G. soja of Korea. Type I was observed from 92.8％ in G. max and 92.0％ in G. soja, and type II was discovered in 7.2％ G. max and 8.0％ G. soja. This result suggested the possibility to be found more various band types.

• Journal of the Korean Orthopaedic Association
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• v.54 no.6
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• pp.562-566
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• 2019

Osteochondroma is a common benign bone tumor, but relatively rare in the spine. Spinal osteochondroma originates mainly from the posterior column and sometimes invades the spinal canal causing cord compression and myelopathy. A 36-year-old man was admitted to the authors' institution with a two-year history of neck pain. A radiology examination revealed osteochondroma, arising from the left superior articular process of the T1 vertebra with significant central canal narrowing. Most cases of the spinal osteochondroma originate in the cervical vertebra, but there are few reports of an origin of the cervicothoracic junction. This paper reports a case of osteochondroma at the cervicothoracic junction with a review of the relevant literature.

• The Korean Journal of Malacology
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• v.12 no.2
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• pp.133-140
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• 1996

한국산 다판류 4종의 정소를 재료로 warm drying method를 이용하여 핵형 분석을 실시하였다. 연두군부과 (Ischnochitonidae)에 속하는 북방줄군부(Lepidezona albrechtii)의 염색체, 그리고 한쌍의 차중부염색체로 구성되어 있으며,줄군부(Lepidozona coreanica)의 염색체는 2n=24, 중부 염색체 8쌍, 중부 또는 차중부염색체로 구성되어 있었으며, 크기로는 별도의 염색체군으로 나누어지지 않았다. 따가리과(Mopaliidae)에 속하는 따가리(Placiphorella stimpsoni)의 염색체는 2n=24, n=12, 핵형분석결과 6쌍의 중부염색체, 한쌍의 차단부, 그리고 5쌍의 말단부염색체였으며, 1변과 2번 염색체쌍은 다른 염색체쌍들 보다 월등히 큰 것으로 나타났다. 군부과 (Chitonidae)에 속하는 꼬마군부(Chiton kurodai)의 염색체는 2n=24, n=12,중부염색체 7쌍, 차중부 4쌍, 그리고 한쌍의 차단부염색체였고. 1번 염색체쌍이 크기에 의해 다른 염색체쌍들과 구분되었다. 본 연구의 결과와 과거의 연구 결과를 종합하면, 연두군부 과는 2n=24;따가리과는 2n=12및 24; 군부과는 2n=24및 26의 염색체를 갖고 있는 것으로 요약되며, 군부속 (Ginus Chiton)에서는 속내 종간 숫적 변이가 나타남이 확인되었다.

• Korean Journal of Ichthyology
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• v.24 no.4
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• pp.287-291
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• 2012

To verify the validity of Hemiculter eigenmanni (Jordan and Metz, 1913), we conducted morphological analysis on two syntypes of Hemiculter leucisculus (Basilewsky, 1855) and holotype of H. eigenmanni. Although some morphological differences were recognized between two nominal type specimens, it is concluded intraspecific or geographic variation through comparison with many specimens collected from Korea. Previously suggested synonymy between H. leucisculus and H. eigenmanni was reconfirmed, therefore the latter becomes a junior synonym of the former.

• Korean Journal of Microbiology
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• v.37 no.1
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• pp.56-60
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• 2001

Molecular typing of Bacillus anthracis has been extremely difficult due to the lack of polymorphic DNA markers. Aiming to develop a DNA marker specific for Bacillus anthracis and to be able to discriminate this species from Bacillus genus, we applied the random amplified polymorphic DNA (RAPD)-PCR. We have identified B. anthracis from various Bacillus species. The analysis performed by RAPD clearly demonstrated substantial genetic variations among Bacillus species. This type of analysis is an easy, quick and highly discriminatory technique that may help in diagnosis of anthrax.

• The Korean Journal of Zoology
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• v.36 no.1
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• pp.28-35
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• 1993

한국과 일본에 분포하는 갈겨니(Z. temmincki)를 대상으로 유전적 변이를 조사한 결과 한국에 분포하는 갈겨니 A(mm)-type과 일본에 분포하는 B-type(Watanabe and Mizuguchl, 1988)은 유전적으로 매우 가까운 동일 종으로 나타났고 한국산 갈겨니 B (MS)-type과 일본산 갈겨니 A-type의 유연관계가 가장 멀게 나타났다. 따라서 한국 및 일본에 분포하는 갈겨니는 모두 3종이 존재하는 것으로 추정되며 일본과 한국에 각각 2종씩이 분포하는 것으로 나타났다. 이들 갈겨니의 분화시기는 홍적세시기(Pleistocene)에 이루어진 것으로 추정되었다.

• Korean journal of applied entomology
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• v.23 no.2 s.59
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• pp.102-108
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• 1984

These researches were carried out to investigate the morphology of different species of Trichoderma and the possibilities of differentiation of the species of Trichoderma by electrophoretic methods. Variations between the isolates of a species of Trichoderma indicate the genetical differences, also isozyme and protein patterns will be useful to investigate genetical variations betweens the isolates. It might be possible that distinct bands of isozymes of esterase, phosphotase, catalase, catalase differentiate species of Trichoderma.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.26 no.1
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• pp.56-68
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• 1981

A maize line was selected in 1979 among 1000 Korean local maize lines collected in 1977. The selected maize line was characterized by having three to four tillers and eight to 10 ears on each individual plant. The line was assumed to have a great potential as a silage crop. The investigation was conducted as one of the serial studies on the Korean maize collected lines to provide basic information on the genetic variabilities of the multi-eared and tillered (MET) line and on other agronomic characters, prior to use the line as material for future breeding works for silage crop. The MET line and Suwon #19, single cross hybrid, as check variety were planted on May 1, 15 and 30, in three different levels of plant populations. The results obtained were summarized as follows: 1. The genetic variabilities of multi-ear and tillering habits were greater than environmental variabilities. 2. Total dry leaf weight of individual plant of MET line was also significantly higher than that of Suwon #19. 3. The mean number of tillers and ears bearing on the individual plant of MET line varied greatly with plant densities. The number of tillers and ears was on the average 2.9 and 7.0, respectively, when planted in 60cm. by 60cm. 4. The total dry matter and dried stem weight of the individual plant on MET line were comparable to those of Suwon #19. 5. The kernel weight from the individual plant of MET line was 5 to 40% less than that of Suwon #19, depending upon the plant densities. 6. The Kernel to stover ratio was higher for Suwon #19 than for the MET line. (41% to 35%). 7. The MET line had shown first tiller two weeks after planted on May 1. The second and third tillers appeared three to five days after the appearance of the first tiller. 8. The MET line was very specific in tillering habits. All the tillers were borne on the first few nodes of main stem below the soil surface. 9. The tillering habits of MET line were vigorous in the early part of the growing season, but less vigorous in the later part of the growing season. The number of efficient tillers bearing useable ears, was around two to three, when planted in 60cm. by 60cm. 10. The difference of plant height between main stem and first few tillers was around 10cm. 11. The ear size of MET line was around one-third of the major corn belt hybrids. The shape of ear of MET line was conical, with different diameter. 12. The kernel of the MET line was flinty with small soft starch patches on the endosperm part. 13. The 100 kernel weight was around 15gr., which is about one half of the major high yielding hybrids. 14. The ear height of MET line was comparatively higher than that of Suwon #19. 15. Significantly high and positive phenotypic correlation coefficients were obtained among major plant characters. 16. The growth rate of MET line was slower than that of Suwon #19. 17. MET line and Suwon #19 were both heavily infected with black streaked mosaic virus.

• Korean Journal of Agricultural and Forest Meteorology
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• v.20 no.3
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• pp.233-242
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• 2018

This study explored the richness patterns of vascular plant species and evaluated the effects of the climatic and habitat variables on the observed patterns along elevational gradients on the Mt. Baekhwa, South Korea. Plant data were recorded from 70 plots and a total of 187 plant species with 78 woody and 109 herbaceous species were recorded along two study transects, the Banyasa and Bohyunsa transects, on the Mt. Baekhwa. A total of 154 plant species with 66 woody and 88 herbaceous species and 131 plant species with 58 woody and 73 herbaceous species were recorded along the Banyasa and Bohyunsa transects, respectively. We used simple ordinary least squares regression model, multi-model inference and variation partitioning to analyze the relative contribution of climatic and habitat variables on the elevational richness patterns. Species richness pattern for vascular plants along the Banyasa transect monotonically decreased with elevation, whereas plant species richness showed reversed hump-shaped pattern along the Bohyunsa transect. Although the elevational patterns of species richness for vascular plants were different between the both transects, habitat variables are more important predictors than climatic variables for the elevational patterns of plant species richness along our study transects on the Mt. Baekhwa. These results indicate that elevational diversity patterns of vascular plants may be different even between nearby elevational transects in a mountain ecosystem but the diversity patterns may be controlled by same drivers.

• Microbiology and Biotechnology Letters
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• v.26 no.2
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• pp.102-109
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• 1998

To investigate the increased acid tolerance of a acid-resistant mutant Leuconostoc mesenteroides M-100 improved as a kimchi starter, proton permeability, ATPase acitivity, glycolysis activity, $Mg^{2+}$ releasement, and membrane fatty acid composition were studied and comprised with its wild type Leuconostoc mesenteroides Mw. In the proton permeability experiment, the mininum values of the average half time ($t_{1/2}$) of pH equilibration through the cell membrane of the Mw and the M-100 were about 8.6 min and 9.2 min in 150 mM KCI solution, respectivily. In the 3% NaCl solution, the $t_{1/2}$ values of the Mw and the M-100 were 6min and 8.6 min, respectivily. The values and pHs of maximal specific activities of ATPase originated from the Mw and the M-100 were 0.6U at pH 5.5 and 0.8U at pH 5.5, respectivily. The result of pH dependence of glycolysis showed that the M-100 had higher activities than that of Mw except at pH 5.0. The releases of magnesium from the Mw and the M-100 were observed about 36.5% and 13% at pH 4.0 after 2 hours, respectivily. The results of comparison of membrane fatty acid composition of the Mw with the M-100 showed that $C_{12}$, $C_{14}$, $C_{18:1}$, and $C_{19:0cyclo}$ were major different fatty acids between two strains and the content of $C_{18:1}$, and $C_{19:0cyclo}$ were 23.4%, 10.2% in the Mw and 15.1%, 12.2% in the M-100. These results indicated that acid tolerance of the M-100 was significantly improved in comparison with its wild type Mw.