• 제목/요약/키워드: 16p11.2

검색결과 3,294건 처리시간 0.032초

섬진강 하구역에서 염분구배에 따른 일본재첩의 분포와 성장특성 (Growth characteristics and distribution pattern of a brackish water clam, Corbicula japonica along an estuarine salinity gradient in Seomjin River)

  • 백승호;서진영;최진우
    • 한국산학기술학회논문지
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    • 제16권10호
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    • pp.6852-6859
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    • 2015
  • 본 연구는 섬진강에서 염분구배에 따른 일본채첩의 분포와 성장특성을 조사하기 위해서 14개 정점에서 봄과 이른 여름사이 현장조사를 수행하였다. 저층의 염분은 상류 정점14에서 1.02 psu로 가장 낮게, 광양만 정점1에서 32.9 psu로 가장 높게 나타났고, 섬진강 상류로 올라갈수록 지수함수적으로 염분이 감소하는 것을 파악하였다. 특히 정점11에서 염분이 급격하게 떨어져 15 psu전후를 유지하였고, 이 구간을 염분전이지역이라고 할 수 있었다. 일본재첩의 분포는 염분농도구배에 따라서 의존되는 양상을 보였고, 최고밀도는 정점13에서 $2,102inds.m^{-2}$ 로 가장 높았고, 다음으로 정점11에서 $1,507inds.m^{-2}$로 관찰되었다. 여기서, 염분의 차이에 따른 일본재첩의 성장특성에 초점을 두어 평가한 결과, 일본재첩 각장에 대한 전중량의 관계는 정점13($R^2=0.91$, P<0.001)에서 정점11($R^2=0.72$, P<0.001)보다 유의하게 높은 상관성을 보였다. 반대로, 각장대비 각고와 각폭에 대한 관계는 정점13보다 정점11에서 높은 상관성이 관찰되었다(P<0.001). 아울러 비만도지수 또한 정점13에서 채집한 재첩이 정점11보다 유의하게 높게 나타났다(t-test= -22.87, P<0.001). 이와 같은 결과는 염분에 대한 스트레스로부터 방어기작의 차이로 판단되며, 염분이 낮은 정점13에서는 패각보다 체성장에 더 많은 에너지를 투입하고, 염분의 변화가 심한 정점11에서는 재첩의 육질을 보호하기 위해서 패각을 튼튼하게 만드는 생존전략으로 판단된다. 이와 같은 염분에 대한 방어기작의 차이는 생태학적으로 일본재첩의 생존전략에 중요한 역할을 하고 있는 것으로 기대된다.

수면박탈에 의한 P300 잠복기 연장과 성격요소와의 연관성 (Correlation Between the Prolongation of P300 Latency during Sleep Deprivation and Personality Variables)

  • 이헌정;전혜연;김용구;서광윤;김린
    • 수면정신생리
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    • 제10권1호
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    • pp.61-66
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    • 2003
  • 목 적:수면박탈은 인지기능의 저하를 가져오며 이는 신 경생리학적 변화인 P300의 잠복기 연장과 진폭의 저하를 가져온다고 보고된다. 또한 이러한 수면박탈에 의한 변화 정도에 개인의 특성이 영향을 줄 수 있다고 알려져 있다. 본 연구는 수면박탈에 의한 P300의 잠복기 연장 정도와 성격 특성의 관련성에 관하여 살펴보고자 하였다. 방 법:18명의 피험자에게 37시간 동안 수면박탈이 시행되었으며, 2일간의 실험기간동안 아침 7시와 저녁 7시에 총 4차례 P300 검사를 시행하였다. 또한 첫날 10시경에 MMPI와 STAI-T 검사를 시행하였다. 총 4회의 P300의 변화 중 아침, 저녁의 검사 결과끼리 paired t-test를 시행하였다. 이 결과에 기초하여 수면박탈에 의하여 P300의 잠복기 연장이 심하지 않은 군(n=9)(Group A)과 심한 군(n=9) (Group B), 두 군으로 나누었으며, 두 군의 MMPI의 각 척도 점수와 STAI-T 점수를 t-test 통하여 비교하였다. 결 과:수면박탈에 의하여 유의한 P300 잠복기의 연장이 있었다(p<0.005). 그러나 진폭에 있어서는 저녁시간에만 유의한 진폭의 감소가 있었다(p<0.005). 잠복기 연장이 심한 경우(Group B)와 심하지 않은 경우(Group A)를 나누어 MMPI 각 척도 값들을 t-test 시행한 결과, Group B가 Group A에 비하여 Mf척도(t=-2.16, df=16, p=0.046)와 Pa척도(t=-2.61, df=16, p=0.019)에서 유의하게 점수가 높았으며, F척도는 통계적으로 유의한 정도는 아니지만 Group B가 Group A보다 점수가 높았다(t=-2.11, df=16, p=0.052). 결 론:MMPI 소척도 중 F, Mf, Pa 척도가 높은 사람이 P300의 변화로 표현되는 수면박탈에 의한 정보처리 효율성의 저하에 취약한 것으로 보인다. 즉, F 상승으로 표현되는 주관적인 심리적 호소가 많음, Mf의 상승으로 표현되는 예민, 수동, 의존적인 면 그리고, Pa척도의 상승으로 나타나는 예민하고 투사 및 외향화하는 성격이 수면박탈에 취약하다고 추정할 수 있겠다.

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Fibrin 용해 균주의 분리 및 특성 (Isolation and Characterization of a Bacterium with a Fibrinolytic Activity)

  • 정용준
    • KSBB Journal
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    • 제14권1호
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    • pp.103-108
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    • 1999
  • 혈전 용해효소를 생산하는 미생물을 탐색하기 위하여 장류 및 토양사료로부터 미생물을 분리하여 그 중 fibrin 용해활성이 높고 기질특이성이 우수한 S7-l6 균주를 선발하였다. 선발된 미생물은 Gram 양성의 간균으로 운동성이 있고, catalase 양성이었으며 포자를 형성하는 것으로 관찰되어 BClcilius sp. S7-16으로 명명하였다. $\alpha$cill$\mu$ sp S7-16의 효소생산 조건을 검토한 결과,0.5% (w/v) polypeptone, 0.5% (w/v) yeast extract, 0.3% (w/v) NaCI, 0.l%(w/v) $KH_2P0_4$, 0.3% (w/v) $KH_2P0_4$, 0.01% (w/v) $MgSO_4.7H_20$(pH7.0)의 배지조성하에서 $35^{\circ}C$애서 180 rpm으로 24시간 회전진탕배양하였을 때 fibrin 용해효소 생산이 최대를 보였으며, 이때 casein 용해활성은 나타나지 않았다. Fibrin 용해효소의 효소적 특성을 조사하기 위해 이 조건하에서 얻어진 배양상동액에 20~60% ammomum sulfate 분획침전을 행하여 조효소액을 조제하였으며, 얻어진 조효소액은 pH4~11의 범위에서 안정하였으며, $50^{\circ}C$까지 비교적 활성이 유지되는 열안 정성을 보여주었다. 조효소액의 최적 pH와 온도는 각각 7.5, $40^{\circ}C$부근에서 최적활성을 보였다.

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Flavobacterium jocheonensis sp. nov., Isolated from Marine Green Alga Ulva pertusa

  • Choi, Ha Ri;Park, So Hyun;Heo, Moon Soo
    • Journal of Microbiology and Biotechnology
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    • 제29권8호
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    • pp.1266-1272
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    • 2019
  • A bacterial strain, labeled $UR11^T$, was isolated from green alga Ulva pertusa collected from Jeju Island, Korea. $UR11^T$ was identified as a gram-negative, rod-shaped, motile by gliding and aerobic bacterial strain with yellow colonies on R2A plates. The strain $UR11^T$ grew over at a temperature range of $10^{\circ}C$ to $30^{\circ}C$ (optimally at $25^{\circ}C$), a pH range of 6.0-11 (optimally at pH 7.0) and a Nacl range of 0.5-5% Nacl (w/v). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain $UR11^T$ was a member of the genus Flavobacterium. Strain $UR11^T$ shared close similarity with F. jejuensis $EC11^T$ (98.0%) F. jumunjinense $HME7102^T$ (96.1%), F. haoranii $LQY-7^T$ (95.3%), F. dongtanense $LW30^T$ (95.1%), and F. ahnfeltiae 10Alg $130^T$(94.9%). The major fatty acids (>5%) were $iso-C_{15:0}$ (33.9%), $iso-C_{15:1}$ G (12.4%), $iso-C_{17:0}$ 3-OH (9.0%), $isoC_{16:0}$ (7.0%) and $iso-C_{15:0}$ 3-OH (6.3%). The major polar lipids were phosphatidylethanolamine, seven unknown aminolipids, two unknown aminopolarlipids and two unknown lipids. DNA-DNA hybridization value was 58% at strain $UR11^T$ with F. jejuensis $EC11^T$. Based on phenotypic, chemotaxonomic and phylogenetic evidence, strain $UR11^T$ represents a novel species of the genus Flavobacterium, for which the name Flavobacterium jocheonensis sp. nov. is proposed. The type strain is Flavobacterium jocheonensis is $UR11^T$ (=KCTC $52377^T$ =JCM $31512^T$).

Association between C16orf47 Gene and Serum Liver Enzyme Levels in the Korean Population

  • Ahn, Hyo-Jun;Eom, Yong-Bin
    • 대한의생명과학회지
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    • 제19권3호
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    • pp.239-244
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    • 2013
  • Serum liver enzyme levels are widely used in the clinical diagnosis of liver diseases and the assessment of liver status. They also have epidemiological significance to be prospective risk factors for type 2 diabetes, cardiovascular disease. In the previous study, single nucleotide polymorphisms (SNPs) in several genes have been reported to be associated with serum liver enzyme levels in American population. We aimed to confirm whether the genetic variation of C16orf47 (chromosome 16 open reading frame 47) gene also influence the serum liver enzyme levels in Korean population. We genotyped variants in or near C16orf47 in a population-based sample including 994 unrelated Korean adult. Here, we performed association analysis to elucidate the possible relations of genetic polymorphisms in C16orf47 gene with serum liver enzyme levels. By examining genotype data of a total of 944 subjects in 5 hospital health promotion center, we discovered the C16orf47 gene polymorphisms are associated with serum liver enzyme levels. The common and highest significant polymorphism was rs7203412 (${\beta}$=3.68, P=3.66E-06) with glutamic oxaloacetic transferase (GOT) and rs7203412 (${\beta}$=6.2, P=7.06E-05) with glutamic pyruvate transaminase (GPT) in all group. Furthermore, the SNP rs7203412 was consistently associated with GOT (${\beta}$=6.41, P=6.78E-08) and GPT (${\beta}$=11.53, P=2.81E-06) in men group. Consequently, we found statistically significant SNP in C16orf47 gene that are associated with serum levels of GOT and GPT. In addition, these results suggest that the individuals with the minor alleles of the SNP in the C16orf47 gene may be more elevated serum liver enzyme levels in the Korean population.

The Crystal Structure of One Natural Compound Cyclo-(1,10-Docandiamino-11,20-Docanedioic) Amide (1,12-Diazacyclodocosane-2,11-Dione)

  • Wei, Wan-Xing;Pan, Yuan-Jiang
    • Bulletin of the Korean Chemical Society
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    • 제23권11호
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    • pp.1527-1530
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    • 2002
  • 1,12-diazacyclodocosane-2,11-dione was first isolated from a plant Phyllanthus niruri Linn. Its structure has been determined by means of spectroscopy methods and X-ray crystallography. Two peptide groups in the big ring (lactam) are the main factors influencing intermolecular contacts. The hydrogen-bond interaction of these hydrophilic groups is observed in the crystal structure. Meanwhile, C-H···O hydrogen bonds in molecules contribute to the formation of the whole crystal. These two kinds of hydrogen-bond form six- member rings among molecules. This compound crystallizes in the triclinic space group P-1 with a= 9.588(1) $\AA$, b= $9.850(1)\AA$, c = $11.810(1)\AA$, $\alpha=$ 68.18(1)$^{\circ}C$ , $\beta=$ 84.98(1), $\gamma$ = 86.03(1)$^{\circ}C$ , V = $1030.66(17)\AA3$ , Z = 2. A disorder of five-member carbon chain in the whole ring is observed in the title compound. The bond angle 105.8(4) is determined for a extreme configuration C(14)-C(15)-C(16), and 117.7(10) for another extreme configuration C(14')-C(15')-C(16'). In this crystal, two molecules are tied each other by short intermolecular hydrogen bonds, the oxygen atom being tied by hydrogen bond to nitrogen atom of another two molecules. The NMR and IR spectral data coincides to the structure of the compound.

Early Diagnosis of ABCB11 Spectrum Liver Disorders by Next Generation Sequencing

  • Lee, Su Jeong;Kim, Jung Eun;Choe, Byung-Ho;Seo, An Na;Bae, Han-Ik;Hwang, Su-Kyeong
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • 제20권2호
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    • pp.114-123
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    • 2017
  • Purpose: The goal of this study was the early diagnosis of ABCB11 spectrum liver disorders, especially those focused on benign recurrent intrahepatic cholestasis and progressive familial intrahepatic cholestasis. Methods: Fifty patients presenting neonatal cholestasis were evaluated to identify underlying etiologies. Genetic analysis was performed on patients suspected to have syndromic diseases or ABCB11 spectrum liver disorders. Two families with proven ABCB11 spectrum liver disorders were subjected to genetic analyses to confirm the diagnosis and were provided genetic counseling. Whole exome sequencing and Sanger sequencing were performed on the patients and the family members. Results: Idiopathic or viral hepatitis was diagnosed in 34%, metabolic disease in 20%, total parenteral nutrition induced cholestasis in 16%, extrahepatic biliary atresia in 14%, genetic disease in 10%, neonatal lupus in 2%, congenital syphilis in 2%, and choledochal cyst in 2% of the patients. The patient with progressive familial intrahepatic cholestasis had novel heterozygous mutations of ABCB11 c.11C>G (p.Ser4*) and c.1543A>G (p.Asn515Asp). The patient with benign recurrent intrahepatic cholestasis had homozygous mutations of ABCB11 c.1331T>C (p.Val444Ala) and heterozygous, c.3084A>G (p.Ala1028Ala). Genetic confirmation of ABCB11 spectrum liver disorder led to early liver transplantation in the progressive familial intrahepatic cholestasis patient. In addition, the atypically severe benign recurrent intrahepatic cholestasis patient was able to avoid unnecessary liver transplantation after genetic analysis. Conclusion: ABCB11 spectrum liver disorders can be clinically indistinguishable as they share similar characteristics related to acute episodes. A comprehensive genetic analysis will facilitate optimal diagnosis and treatment.

Phytochemical Constituents of the Leaves of Hosta longipes

  • Kim, Chung Sub;Kim, Ki Hyun;Lee, Kang Ro
    • Natural Product Sciences
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    • 제20권2호
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    • pp.86-90
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    • 2014
  • Phytochemical investigation of the 80% MeOH extract from the leaves of Hosta longipes resulted in the isolation of sixteen compounds (1 - 16). The structures of the compounds were elucidated by spectroscopic methods to be methyl 10,10-dimethoxydecanoate (1), methyl 10-hydroxy-8E,12Z-octadecadienoate (2), methyl coriolate (3), trans-phytol (4), phytene-1,2-diol (5), phyton (6), (3S,5R,6S,7E,9R)-7-megastigmene-3,6,9-triol (7), (3S,5R,6S,9R)-3,6,9-trihydroxymegastigman-7-ene (8), shikimic acid (9), p-coumaramide (10), trans-N-p-coumaroyltyramine (11), cis-N-coumaroyltyramine (12), tryptophan (13), thymidine (14), adenosine (15), and deoxyadenosine (16). Compound 1 was synthesized, but not yet isolated from natural source, and compounds 2-16 were isolated for the first time from this plant source.

유동상 담체를 이용한 Loop Reactor에서 유기물 및 질소, 인 제거 (The Removal of Organics, Nitrogen and Phosphorus in Loop Reactor Using Fluidized Media)

  • 선용호
    • KSBB Journal
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    • 제24권4호
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    • pp.353-360
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    • 2009
  • 본 연구에서는 혐기조 및 무산소조, 호기조로 구성된 상향류식 고정상 담체 반응장치와 호기조로 고정상 담체 대신에 유동상 담체를 사용한 Loop Reactor로 이루어진 장치에서 생활하수를 이용하여 성능실험을 수행한 후 HRT에 따른 유기물 및 T-N, T-P 등 오염물질의 제거 특성을 비교 분석하였다. 두 반응기 모두 평균 BOD 제거율과 SS 제거율은 HRT가 증가함에 따라 증가하다가 HRT 16 h 이상에서는 일정한 수치를 나타내고 있으며 HRT 16 h에서 고정상 담체 반응기와 Loop Reactor의 평균 BOD 제거율은 각각 86.6%, 90.9%이었으며 평균 SS 제거율은 각각 78.0%, 88.2%로 Loop Reactor의 경우가 각각 4.3%, 10.2%의 더 높은 BOD와 SS 제거율을 나타내었다. 또한 평균 $COD_{Cr}$, 제거율 및 평균 $COD_{Mn}$ 제거율은 BOD와 SS 제거율과 마찬가지로 HRT가 증가함에 따라 증가하다가 HRT 16 h에서 일정한 수치를 나타내고 있으며 고정상 담체 반응기와 Loop Reactor의 평균 $COD_{Cr}$, 제거율은 각각 63.5%, 75.2%이었으며 평균 $COD_{Mn}$ 제거율은 각각 60.7%, 73.6%로 Loop Reactor의 경우가 11.7%, 12.9% 더 높은 제거율을 나타내었다. 반면에 평균 T-N 제거율 및 T-P 제거율은 두 반응기 모두 HRT가 증가함에 따라 제거율은 계속 증가하는 양상을 보여주고 있으며 HRT 16 h에서 Loop Reactor의 경우 평균 T-N 제거율 및 평균 T-P 제거율은 각각 33.6%, 54.5%로 고정상 담체 반응기보다 14.1%, 10.8%의 더 높은 제거율을 나타내었다. 이상의 결과에서 Loop Reactor가 성능이 훨씬 더 우수하였으며 최적 HRT는 16 h임을 알 수 있었다.

Effect of Genotype on Whole-body and Intestinal Metabolic Response to Monensin in Mice

  • Fan, Y.K.;Croom, W.J.;Daniel, Linda;McBride, B.W.;Koci, M.;Havenstein, G.B.;Eisen, E.J.
    • Asian-Australasian Journal of Animal Sciences
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    • 제19권4호
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    • pp.554-562
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    • 2006
  • Two lines of mice, M16 selected for rapid growth and a randomly selected control ICR as well as their reciprocal crosses were used to study the effects of genotype on whole-body energetics and intestinal responses to monensin. Six mice, eight weeks of age, from each line or reciprocal cross were assigned to one of two treatments, 1) drinking water containing 20 mmol/L monensin dissolved in 0.5% V/V ethanol, and 2) drinking water containing 0.5% V/V ethanol (control) for two weeks. After 11 days (age of 9 weeks and 4 days), whole-body $O_2$ consumption was measured. At the end of two weeks, jejunal $O_2$ consumption, intestinal tissue composition and histomorphometrics as well as the rate and efficiency of glucose absorption were estimated. In comparison with the control, monensin administration in drinking water resulted in less daily water intake (13.4 vs. 15.5 ml/mouse, p<0.01), less protein to DNA ratio of jejunal mucosa (5.41 vs. 6.01 mg/mg, p<0.05), lower villus width (88 vs. $100{\mu}m$, p<0.05), and less jejunal tissue $O_2$ consumption enhancement by alcohol (7.2 vs. 10.5%, p<0.01) in mice. Other than those changes, monensin had little (p>0.05) effect on variables measured in either line of mice or their reciprocal cross. In contrast, the M16 line, selected for rapid growth, as compared to the ICR controls or the reciprocal crosses, had less initial (pre-monensin treatment) whole-body $O_2$ consumption per gram of body weight (1.68 vs. $2.11-2.34{\mu}mol/min{\cdot}g$ BW, p<0.01) as compared to the ICR and reciprocal crosses. In addition, the M16 mice exhibited greater growth (412 vs. 137-210 mg/d, p<0.05), better feed efficiency (41.7 vs. 19.9-29.3 mg gain/g feed, p<0.05), shorter small intestines adjusted for fasted body weight (1.00 vs. 1.22-1.44 cm/g FBW, p<0.05), wider villi (109 vs. $87-93{\mu}m$, p<0.05), more mature height of enterocytes (28.8 vs. $24.4-25.1{\mu}m$, p<0.05) and a lower rate (91 vs. $133-145{\eta}mol\;glucose/min{\cdot}g$ jejunum, p<0.05) and less energetic efficiency (95 vs. $59-72{\eta}mol$ ATP expended/${\eta}mol$ glucose uptake, p<0.05) of glucose absorption compared to the ICR line and the reciprocal cross. Monensin had little (p>0.05) effect on whole-body $O_2$ consumption and jejunal function, whilst selection for rapid growth resulted in an apparent down-regulation of intestinal function. These data suggest that genetic selection for increased growth does not result in concomitant changes in intestinal function. This asynchrony in the selection for production traits and intestinal function may hinder full phenotypic expression of genotypic growth potential.