• 식물분류학회지
• /
• 제39권4호
• /
• pp.247-253
• /
• 2009

한국산 쑥속 20분류군의 분류를 위하여 체세포 염색체수를 조사하였다. 본 연구에서 취급된 분류군들의 체세포 염색체수는 2n = 16, 18, 34, 36, 50, 52, 54로서 기본 염색체수는 x=8, 9, 10, 13, 17이었으며, 실제비쑥(A. japonica var. angustissima 2n = 36)의 체세포염색체수는 본 연구에서 처음으로 밝혀졌다. 사철쑥 (A. capillaris 2n = 18), 섬쑥(A. japonica var. hallaisanensis 2n = 36), 갯제비쑥(A. japonica subsp. littoricola 2n = 36), 개똥쑥(A. annua 2n = 18), 개사철쑥(A. carvifolia 2n = 18), 큰비쑥(A. fukudo 2n = 16), 맑은대쑥(A. keiskeana 2n = 18), 넓은잎외잎쑥(A. stolonifera 2n = 36), 그늘쑥(A. sylvatica 2n = 16), 물쑥(A. selengensis 2n = 36), 산쑥 (A. montana 2n = 52), 뺑쑥(A. lancea 2n = 16), 산흰쑥(A. sieversiana 2n = 18) 등의 13분류군의 염색체수는 기존 보고와 일치하였으며, 기존 보고와 다르게 파악된 종류는 제비쑥(A. japonica var. japonica 2n = 18, 36 vs 2n = 36), 더위지기(A. sacrorum 2n = 18, 54 vs 2n = 54), 덤불쑥(A. rubripes 2n = 16, 34 vs 2n = 16), 쑥(A. indica 2n = 34, 36 vs 2n = 34), 참쑥(A. codonocephala 2n = 18, 50, 54 vs 2n = 50), 황해쑥(A. argyi 2n = 34, 36, 50 vs 2n = 34)의 6분류군이었다. 한국산 쑥속의 체세포 염색체수는 제비쑥, 더위지기, 참쑥, 황해쑥, 산쑥, 그늘쑥의 분류에 매우 유용한 형질이었다.

• 대한화학회지
• /
• 제26권1호
• /
• pp.43-48
• /
• 1982

Phthalimido기와 2, 2, 2-trichloroethyl기를 공유한 화합물들, 즉 2,2,2-trichloroethyl phthalimidoacetate (1a), 2,2,2-trichloroethyl 6-phthalimidohexanoate (2a), 2,2,2-trichloroethyl 2-phthalimidopropanoate (3a) 및 2,2,2-trichloroethyl N-phthaloylcarbamate (4a)를 합성하여 초산수용액(방법 A), THF 수용액(방법 B)및 triethylamine을 포함한 THF 수용액(방법 C)에서 아연분말과 각각 반응시킨 결과, 방법 A와 B의 경우에는 2, 2, 2-trichloroethyl기가 환원분해 됨과 동시에 phthalimido기도 3-hydroxyphthalimidino기로 환원됨을 알았으며, 방법 C의 경우에는 phthalimido기는 환원되지 않고 2, 2, 2-trichloroethyl 기 만이 선택적으로 환원 분해됨을 발견하였다.

• 한국인터넷방송통신학회논문지
• /
• 제11권4호
• /
• pp.157-164
• /
• 2011

$n=pq$인 합성수 $n$을 $p$와 $q$로 소인수분해하는 것은 매우 어려운 문제이다. 대부분의 소인수분해 알고리즘은 $a^2{\equiv}b^2$ (mode $n$)인 제곱 합동이 되는 ($a,b$)를 찾아 $a^2-b^2=(a-b)(a+b)$ 공식에 의거 유클리드의 최대공약수 공식을 적용하여 $p=GCD(a-b,n)$, $q=GCD(a+b,n)$으로 구한다. 여기서 ($a,b$)를 얼마나 빨리 찾는가에 알고리즘들의 차이가 있다. 제곱합동의 기초가 되는 페르마 알고리즘은 $a^2-b^2=n$을 찾는다. 본 논문은 $a^2-b^2=kn$, ($k=1,2,{\cdots}$)를 찾는 방법을 제안하였다. 제안된 방법에서 $b$는 5의 배수로 $b_1=0$ 또는 5가 반드시 한 개는 존재한다고 가정한다. 첫 번째로, $n_2n_1$에 대해 $b_1=0$와 $b_1=5$을 만족하는 $kn$을 구하여 $k$를 결정한다. 두 번째로, $a^2-b^2=kn$이 되는 $a_2a_1$을 결정한다. 세 번째로, $kn$ < $a^2$ < $(k+1)n$ 범위에 속하는 $\sqrt{kn}$ < $a$ < $\sqrt{(k+1)n}$의 범위를 결정하여 $a_2a_1$ 값들에 대해 $a^2-b^2=kn$으로 ($a,b$)를 구한다. 제안된 알고리즘을 몇 가지 사례에 적용한 결과 페르마 알고리즘에 비해 수행 속도를 현격히 단축시키는 효과를 얻었다.

• 대한화학회지
• /
• 제52권3호
• /
• pp.249-256
• /
• 2008

3-Acetyl/Formyl 4-hydroxy-2H(1)-benzopyran-2-one를 malonitrile와 ethyl cyanoacetate로 처리하여 각각 1,1-dicyano-2-[4/-hydroxy-2/H(1)-benzopyran-2/-one-3/-yl] ethene/propene 2a-h와 ethyl-2-cyano-3-[4/-hydroxy-2/H (1)-benzopyran-2/-one-3/-yl] propenoate/butenoate 3a-h를 얻었다. NaN3와 2a-h의 1.3 dipolar 반응에서 4a-h인 tetrazole유도체를 얻었다. 3a-h는 PPA를 이용한 고리화 반응으로 3-cyano-2H,5H-pyrano [3, 2-c] benzopyran-2,5-diones 5a-h를 얻었다. 5a-h는 NaN3와1.3 dipolar 반응으로 -(1/H-tetrazol-5/-yl)-2H,5H-pyrano[3, 2-c] benzopyran-2,5-diones 6a-h얻었다. 화합물의 구조는 스펙트럼과 자료 분석을 기초로 입증했다.모든 화합물은 항균 활성을 검사하였고 의미있는 항균성을 가짐을 밝혔다. 2h화합물과 4h 화합물은 50 킽/mL에서 활성을 보였다

• 대한화학회지
• /
• 제54권4호
• /
• pp.429-436
• /
• 2010

Guanine (1)으로부터 생물활성이 있는 halogenopurines계 화합물을 합성하였다. Guanine을 acetic anhydride와 반응시켜서 2,9-diacetylguanine (2-1)을 합성하여 얻어진 화합물을 $POCl_3$와 반응시켜서 화합물 3a를 합성하고, 다음 단계에서 2-amino-6-halogenopurines (3b-d)를 합성하였다. 2-Halogenopurines (2-2a-d, 4-2a-d, 5a-d)을 2-amino-6-substituted purines (1, 3a, 4-1)로부터 효율적으로 합성한 후에, 새로운 화합물인 2-2a, 2-2c, 2-2d, 4-2c, 4-2d, 5b, 5c 및 5d를 합성하였다. 합성한 화합물의 구조를 원소분석, $^1H$ NMR, mass spectral data로 확인하였으며, 합성한 화합물에 대한 항균 활성을 시험하였다.

• Plant Resources
• /
• 제3권3호
• /
• pp.179-183
• /
• 2000

The present study was carried out to clarify the chromosome numbers and karyotype of Atractylodes japonica Koidz. ex Kitam. and A. macrocephala Koidz.. The somatic chromosome numbers of two species were same; basic chromosome number x=12, and somatic chromosome numbers 2n=24. The present result of A. japonica Koidz. ex Kitam. was same to previously reports and that of A. macrocephala Koidz. was reported first in this study. Size and shape of chromosome were some different from A. japonica Koidz. ex Kitam. and A. macrocephala Koidz.. The karyotype of A. japonica Koidz. ex Kitam. was described as follows; 2n : 24 : 8L + 14M +2S : 2 $A^{sm}$ +2 $B^{m}$ +2 $C^{m}$ +2 $D^{st}$ + 2 $E^{m}$ +2 $F^{m}$ +2 $G^{m}$ +2 $H^{sm}$ + 2 $I^{m}$ + 2 $J^{m}$ + 2 $K^{m}$ + 2 $L^{m}$ . And the karyotype of A. macrocephata Koidz. was described as follows; 2n : 24 : 10L +12M +25 : 2 $A^{m}$ +2 $B^{sm}$ +2 $C^{sm}$ +2 $D^{sm}$ +2 $E^{sm}$ +2 $E^{sm}$ +2 $G^{sm}$ +2 $H^{m}$ +2 $I^{m}$ 2 $J^{m}$ +2 $K^{m}$ +2 $L^{m}$ . .

• ALGAE
• /
• 제18권3호
• /
• pp.191-197
• /
• 2003

Histones are important proteins that interact with the DNA double helix to form nucleosome. Two putative histone genes, GjH2A-1 and GjH2A-2 were isolated from a red alga Griffithsia japonica. The putative open reading frame of GjH2A-1 and GjH2A-2 shared high similarity with the previously reported amino acid sequences of histone H2As. They have a motif consisting of seven amino acids A-G-L-Q-F-P-V, which matches the histone H2A motif [AC]-G-L-x-F-P-V. Phylogenetic trees were constructed from amino acid sequences of 38 histone H2As. The histone H2As were divided into two groups: major H2As and H2A.F/Z variants. The major histone H2A group consisted of animals, fungi, plants + green algae, and red algae H2A subgroups. The animal histone H2A subgroup was divided into vertebrates, echinoderms, nematodes, insects, and segmented worms H2As. The putative red algal histone genes, GjH2A-1 and GjH2A-2, constituted an independent lineage. This is the first report on red algal histone genes.

• Bulletin of the Korean Chemical Society
• /
• 제16권10호
• /
• pp.981-984
• /
• 1995

New diamineplatinum(Ⅱ) complexes of cyclohexylidenemalonate (chm) ligand, A2Pt(OOC)2C=C(CH2)4CH2 (1, A2=ethylenediamine (en); 2, A2=propylenediamine (pn); 3, A=NH3; 4, A=isopropylamine (ipa)) have been prepared. Their oxidation with H2O2 has led to the corresponding dihydroxoplatinum(Ⅳ) complexes: cis, cis, trans-A2Pt((OOC)2C=C(CH2)4CH2)(OH)2 (5, A2=en; 6, A2=pn; 7, A=NH3; 8, A=ipa). The title complexes have been characterized by means of various spectroscopies and X-ray crystallography. 5 crystallizes in the monoclinic space group P21/a (Z=4) with a=12.098(7) Å, b=9.552(2) Å, c=16.258(4) Å, β=98.03(5)° and V=1860(1) Å3. The structure was refined to R=0.074. The local geometry around platinum atom is approximately octahedral with each hydroxide group in trans position. These platinum complexes are stable in aqueous solution. Pt(Ⅳ) complexes are readily reduced to the corresponding Pt(Ⅱ) complexes by ascorbic acid.

• Journal of the Korean Statistical Society
• /
• 제22권1호
• /
• pp.39-54
• /
• 1993

In the three-factor nested variance component model with equal numbers in the cells given by $y_{ijkm} = \mu + A_i + B_{ij} + C_{ijk} + \varepsilon_{ijkm}$, the exact confidence intervals of the variance component of $\sigma^2_A, \sigma^2_B, \sigma^2_C, \sigma^2_{\varepsilon}, \sigma^2_A/\sigma^2_{\varepsilon}, \sigma^2_B/\sigma^2_{\varepsilon}, \sigma^2_C/\sigma^2_{\varepsilon}, \sigma^2_A/\sigma^2_C, \sigma^2_B/\sigma^2_C$ and $\sigma^2_A/\sigma^2_B$ are not found out yet. In this paper approximate lower and upper confidence intervals are presented.

• 대한예방한의학회지
• /
• 제3권1호
• /
• pp.125-145
• /
• 1999

The effects of Wang-ttum, Magnetic Water, Magnetic field and Sibjeondaebotang on hemodynamics in sleep deprivation were studied. The results as follows; 1. In case of Wang-ttum operated group, significant changes were observed at 12 p.m., 2 a.m., 4 a.m. in maximum blood pressure for the first and second overnight stay and at 2 a.m. for the third and, respectively, average blood pressure at 12 p.m., 2 a.m. for the 1st and 2nd overnight stay, minimum blood pressure at 10 p.m.. 12 p.m.. 2 a.m. for the 1st overnight stay and at 10 p.m., 12 p.m. for the 2nd and at 12 p.m. for the 3rd, pulse rate at 12 p.m., 2 a.m., 4 a.m., 6 a.m., for 1st and 2nd and at 2 a.m., 4 a.m. for the 3rd and 4th, TP-KS at 12 p.m., 2 a.m., 4 a.m., 6 a.m. for the 1st and 2nd and at 2 a.m., 4 a.m., 6 a.m. for the 3rd, PRP at 10 p.m., 12 p.m., 2 a.m., 4 a.m., 6 a.m. for the 1st and 2nd and at 12 p.m., 2 a.m., 4 a.m. for the 3rd and at 2 a.m., 4 a.m. for the 4th, TPR at 10 p.m., 12 p.m., 2 a.m., 4 a.m., 6 a.m. from 1st to 4th overnight stay. 2. In case of taking magnetic water group, significant changes were observed at 2 a.m., 4 a.m. in pulse rate for the 1st overnight stay and, respectively, PRP at 2 a.m. for the 1st, TRP at 10 p.m., 12 p.m., 2 a.m., 4 a.m., 6 a.m. for the 1st and 4th. 3. In case of attaching magnet group, TPR was significantly observed at 10 p.m. for the 1st overnight stay. 4. In case of medicating Sibjeondaebotang group, significant changes were observed at 10 p.m., 12 p.m., 2 a.m., 4 a.m., 6 a.m. in maximum blood pressure for the 1st and 2nd overnight stay and at 12 p.m., 2 a.m., 4 a.m., 6 a.m. for the 3rd and at 2 a.m., 4 a.m., 6 a.m. for the 4th and, respectively, average blood pressure at 10 p.m., 12 p.m. for the 1st and 2nd and at 10 p.m. for the 3rd and 4th, minimum blood pressure at 10 p.m., 12 p.m. from 1st to 4th, pulse rate at 2 a.m., 4 a.m., 6 a.m. from 1st to 3rd and at 2 a.m., 4 a.m. for the 4th, TP-KS at 10 p.m., 12 p.m., 2 a.m., 4a.m., 6 a.m. for the 1st and at 10 p.m., 2 a.m., 4 a.m., 6 a.m. for the 2nd and at 2 a.m., 4 a.m., 6 a.m. for the 3rd and at 6 a.m. for the 4th, PRP at 12 p.m., 2 a.m., 4 a.m., 6 a.m. for the 1st and at 10 p.m., 12 p.m., 2 a.m., 4 a.m., 6 a.m. for the 2nd and 3rd and at 12 p.m., 2 a.m., 4 a.m., 6 a.m. for the 4th, TPR at 10 p.m., 12 p.m., 2 a.m., 4 a.m., 6 a.m. from 1st to 4th. As mentioned obove, the effects of Wangttum and Sibjeondaebotang on hemodynamics in sleep deprivation were observed both the impulse of SIM-YANG and mutual function of QI-HYOL. The effects of Magnetic water and Magnetic field were observed the side of mutual function of QI-HYOL.