• Journal of Plant Biology
• /
• v.14 no.4
• /
• pp.14-18
• /
• 1971

Lilium Miquelianum Makino is a species which originated in Korea. The Karyotype of the species was examined in materials collected at Mts. Kaya, Kasan, Chejung, and Kaji. The results are as follows: 1) The somatic chromosome number was found to be 2n=24. 2) The karyotype is described as: K=2Am＋2Bkm＋2Csst＋2Dsst＋2Ests＋2Fst＋2Gst＋2Hst＋2Ist＋2Jsst＋2Kst＋2Lst m: metacentric, sm: submetacentric st: subtelocentric, s: secondary constriction 3) A single subcentric supernumerary B-chromosome was found in some bulbs from Mt. Kasan. 4) The shape of the supernumerary B-chromosome was similar to that of the E chromosome which had separated at its secondary constriction and lost its lower chromosome fragment. 5) From three to eight nucleio of varying sizes were found in the telophase or interphase nucleus of root tip cells. The maximum number of eight nucleoli corresponds to the number of chromosomes that have a secondary constriction.

• The KSFM Journal of Fluid Machinery
• /
• v.16 no.2
• /
• pp.5-9
• /
• 2013

The aim of present study is to evaluate the stability of GM(Metacentric Height) calculation and investigate the damping effect of free rolling test. Moreover, GZ(Righting arm in stability) curve shows that it can provide reasonable design conditions for Fish boat. The roll damping characteristics of the improved model for an 7.9 ton class fishing boat are investigated through the free roll test in towing tank. The safety and boarding sensitivity are evaluated by GM calculation and roll motion period. Therefore, the results in this paper describe that the effect for improved hull is more improved than the original hull.

• The Korean Journal of Malacology
• /
• v.4 no.1
• /
• pp.42-49
• /
• 1988

The chromosome of Cipangopaludina chinensis malleata Chunchon area in 1988 was analysed by using aceto-orcein squash techniques of spermatogonial tissues to obtain mitotic and meiotic chromosomes. The chromosome cycle did not differ, in general, from that found in other snails, C. chinensis malleata has 18 diploid chromosomes and they were identified and classified into 2 groups. The mitotic chromosome complement of this species consists of 2 pairs of metacentric and 7 pairs of submetacentric chromosomes, Spermatogonial metaphase chromosomes range in length from 4.10 ${\mu}{\textrm}{m}$ for the largest pair to 2.20 ${\mu}{\textrm}{m}$ for the smallest pair.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2002.11b
• /
• pp.36-37
• /
• 2002

율무(Coix lacryma-jobi)의 핵형 분석을 한 결과 1번 염색체는 short arm과 long arm의 크기가 같은 metacentric chromosome이었으며, 전체의 염색체에 대한 상대적인 길이가 12.8로 가장 길었다. 1번 염색체는 단완과 장완의 양쪽 터미널에 각각 하나씩의 밴드를 나타냈으며 단완과 장완 각각에 interstitial band가 나타났다. 또한 1번 염색체는 단완 끝에 부수체를 갖는 NOR 염색체임을 알 수 있었다. 2번 염색체는 Short arm에 비해 long arm이 길었으며, 전체의 염색체에 대한 상대적인 길이는 11.8로 1번 염색체 다음으로 길었다. 2번 염색체 단완 끝에 하나의 터미널 밴드와 양완의 중간에 각각 interstitial 밴드를 나타냈다. 3번 염색체는 2번 염색체 보다 short arm의 길이보다 더 짧았으며, 상대적인 길이는 10.8로 2번 염색체보다 짧았다. 3번 염색체는 단완 끝에 하나의 terminal 밴드와 centromere 밴드를 나타냈다.(중략)

• Parasites, Hosts and Diseases
• /
• v.52 no.4
• /
• pp.449-451
• /
• 2014

The karyotypes of Biomphalaria tenagophila collected from Rio de Janeiro, Brazil were studied using the air-drying method. Somatic cells of this species had 2n=36. The 18 chromosome pairs were identified and classified into 3 groups. The diploid cell has 7 pairs of metacentric, 8 pairs of submetacentric, and 3 pairs of subtelocentric chromosomes. Observed chromosomes ranged from 2.4 to $6.4{\mu}m$, and the total length was $122.3{\mu}m$. This is the first report on the chromosome of B. tenagophila.

• The Korean Journal of Malacology
• /
• v.13 no.1
• /
• pp.21-27
• /
• 1997

한국에 분포되어 있는 논우렁이과(Viviparidae)권패류는 논우렁이(Cipangopaludina chinensis malleata)와 큰논우렁이(C. japonica), 두 종이 보고되어 있으나 형태학적 유사성 때문에 감별이 용이치 않다. 우선, 본 연구에서는 두 종간에 염색체 수와 핵형분석 결과를 비교해 보고자 하였다. 두 종 모두 염색체 수는 2n=18이었으며 성염색체는 구별할 수 없었고, 두쌍의 metacentric과 7쌍의 submetacentric염색채를 갖고 있었다. 두 종간 평균 염색체 크기에는 큰논우렁이가 논우렁이보다 약 10 $\mu\textrm{m}$정도 크게 나타났다.

• Special Issue of the Society of Naval Architects of Korea
• /
• 2007.09a
• /
• pp.32-42
• /
• 2007

Container vessels are required to have a large KMT to load many containers which requires a wide transom stern form. The wide transom stern generates large stern waves particularly at the scantling draft. This means that reducing the stern wave leads to resistance reduction. Numerical analyses and Model tests for duck-tail of the stern part have been performed to reduce the resistance of the container vessel having the wide transom on the scantling draft and optimize the form of duck-tail with the change of the design parameter i.e. length and edge height. The optimized duck-tail increases the speed by 0.8 % at scantling draft.

• Journal of Plant Biology
• /
• v.36 no.3
• /
• pp.281-284
• /
• 1993

A karyotype of cytotype BB plant in Scilla scilloides Complex was established and the frequency of B-chromosomes were investigated. Chromosome complements of BB genome were composed of five pairs of subtelocentric and four pairs of metacentric chromosomes. Chromosome 1 has satellite with nucleolar organizer. Polymorphism was found in chromosome 2. The karyotype of cytotype BB will be available for analysis of genome composition in various cytotypes of S. scilloides Complex. The frequency of B-chromosome was 78.6%. Numbers of B-chromosome ranged from 1 to 4 and plants with 2B-chromosomes were predominant (57.2%). Two type of B-chromosomes, F and F', were found; F is a large iso-chromosome and F' a small one.

• The Korean Journal of Zoology
• /
• v.16 no.3
• /
• pp.171-176
• /
• 1973

Metaphases were obtained from the bone marrow cells of B. kangii Yoon, by means of direct air-drying technique. The karylogical characteristics of this species were as follows; 1) The diploid chromosome number was 22(2n=22) which might be divided into six large and five small homololgous chromosmes. 2) All homologous chromosomes of this species were metacentrics. 3) The secondary constriction was not found in all members of chromosomes. 4) There was no evidence for the existence of a specific sex chromosome pair in this species.

• Korean Journal of Plant Resources
• /
• v.4 no.1
• /
• pp.5-12
• /
• 1991

A combination of acerocarininc-Wright C-banding technique was utilized to identify each chromosomes in durum wheat ,Triticum durum var. Hordeiforme (2n=4x=28 AABB), This technique elucidated qualitativr and quantitative traits of the indi-vidual chromosomes In coinplement. Most comspicuous bands were observed at thecentromere of B-genome chronmosomes. Each chromosomes of A-genome had some-what weak centromeric, proximal and terminal bands. Chromosomes 2A and 4A hasa small subterminal bands. 6A is smallest and metacentric chromosome and , has two faint interstitial band. Chromosomes 1B and 6B showed satellite and constriction lage band. Short arm of 3B has three heavily interstitial bands. Both arms of chromosome 4B has a lagc centromeric band and a very lage proximal band. 5B had heavilycentromeric band and the long arm showed prominent two interstitial bands. Chromo-somes 25 and 7B has a small terminal band of both arms.