• 제목/요약/키워드: CHN

검색결과 68건 처리시간 0.025초

Cloning and Characterization of a Gene Cluster for Cyclohexanone Oxidation in Rhodococcus sp. TK6

  • Choi Jun-Ho;Kim Tae-Kang;Kim Young-Mog;Kim Won-Chan;Park Kunbawui;Rhee In-Koo
    • Journal of Microbiology and Biotechnology
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    • 제16권4호
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    • pp.511-518
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    • 2006
  • A gene cluster for cyclohexanone oxidation was cloned from Rhodococcus sp. TK6, which is capable of growth on cyclohexanone as the sole carbon source. The 9,185-bp DNA sequence analysis revealed seven potential open reading frames (ORFs), designated as ssd-chnR-chnD-chnC-chnB-chnE-partial pcd. The chnBCDE genes encode enzymes for the four-step conversion of cyclohexanone to adipic acid, catalyzed by cyclohexanone monooxygenase (ChnB), $\varepsilon-caprolactone$ hydrolase (ChnC), 6-hydroxyhexanoate dehydrogenase (ChnD), and 6-oxohexanoate dehydrogenase (ChnE). Furthermore, the presence of a regulatory element in the downstream region of the chnD gene supports the notion that chnR is a putative regulatory gene. Among them, the activity of ChnB was confirmed and characterized, following their expression and purification in Escherichia coli harboring the modified chnB gene (chnB gene with 6 successive codons for His at the 3' terminus).

Cloning and Characterization of Cyclohexanol Dehydrogenase Gene from Rhodococcus sp. TK6

  • CHOI JUN-HO;KIM TAE-KANG;KIM YOUNG-MOG;KIM WON-CHAN;JOO GIL-JAE;LEE KYEONG-YEOLL;RHEE IN-KOO
    • Journal of Microbiology and Biotechnology
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    • 제15권6호
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    • pp.1189-1196
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    • 2005
  • The cyclohexanol dehydrogenase (ChnA), produced by Rhodococcus sp. TK6, which is capable of growth on cyclohexanol as the sole carbon source, has been previously purified and characterized. However, the current study cloned the complete gene (chnA) for ChnA and its flanking regions using a combination of a polymerase chain reaction (PCR) based on the N-terminal amino acid sequence of the purified ChnA and plaque hybridization from a phage library of Rhodococcus sp. TK6. A sequence analysis of the 5,965-bp DNA fragment revealed five potential open reading frames (ORFs) designated as partial pte (phosphotriesterase), acs (acyl-CoA synthetase), scd (short chain dehydrogenase), stp (sugar transporter), and chnA (cyclohexanol dehydrogenase), respectively. The deduced amino acid sequence of the chnA gene exhibited a similarity of up to $53\%$ with members of the short-chain dehydrogenase/reductase (SDR) family. The chnA gene was expressed using the pET21 a(+) system in Escherichia coli. The activity of the expressed ChnA was then confirmed (13.6 U/mg of protein) and its properties investigated.

CHN-corder의 응용과 연소 flask에 의한 미량 유기 Cl, Br, S의 분리정량 (원소-분석을 식품 혼합물 정량에 응용) (Mirco-method for Analysis of Chloride, Bromine and Sulfur in Organic Compounds by Application of CHN Corder and Combustion Flask)

  • 박만기
    • 약학회지
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    • 제13권2_3호
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    • pp.57-61
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    • 1969
  • From the principle of CHN-Corder analysis, it is obvious that seperation of chlorine and bromine in a sample is nearly impossible. In order to analyze, chlorine, bromine, and sulfur seperately in a sample which is a single organic compound or a mixture of organic drugs, combination of flask combustion method and CHN-Corder was successfully attempted.

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중국 수의의 문헌적 고찰 (A Study on the Literature of Chinese Shroud)

  • 유관순
    • 복식
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    • 제25권
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    • pp.105-118
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    • 1995
  • Chinese shroud through literature are as follows. 1. Taetae, SimeI, P'oo, Hansam, Ko, Mal, Nukpaek , Kwatu, Ch'ungi, Pokkn, Myokmok, Ri, Aksu, Mo and m were used the most in China. 2. The cloths of Chinese shroud were p'o, Paek , Kyon and Kum. The colors of the Chinese shroud were Hyon, Hun and white. 3. The size of the Chinese shroud is as follows . The size of the Ch'ungi was similar to the size of jujube kernel, the length of Myokmok was one Chk two Chn or one Chk two Chn or one Chk five Chn, the length of Aksu was one Chjk two Chn and it's width was five Chn. The chil of Mo reached the hands and the length of Swae was three Chk and the length of m was five Chn. 4. In Chinese shroud, , cotton was put in P'oo. Aksu was tide by the strings at two corners. Myokmok was tied by the strings of four corners. The tip of the m was divided and Mo warpped the whole body. 5. The clothes of Soryom was nineteen Ch'ing. The clothes of Taeryom in Kum were one hundred Ch'ing in the Chinese. The impliment of Soryon were Kum, kyo, SangeI, SaneI, Ch'im , Yok and Kyon in the Chinese shroud. In the case of the implement of TAeryom, the chinese shroud had Kum , Kyo, SangeI, Sane, Ch'im and Yok.

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아동간호의 본질적 토대와 사명에 관한 논고(論考) (A Critical Discussion on the Academic Fundamentals and the Missions of Child Health Nursing)

  • 조갑출
    • Child Health Nursing Research
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    • 제21권4호
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    • pp.311-319
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    • 2015
  • Purpose: To reilluminate academic fundamentals and missions of child health nursing (CHN). Methods: Critical review of literature. Results & Conclusion: The academic fundamentals of CHN were analyzed for three different basis; philosophical, theoretical, and legal & ethical basis. The philosophical basis of CHN was summarized as six beliefs; A child is an important human resource and a valuable asset for future society; A child should be respected as a unique and dignified human being; A child has his/her own unique developmental needs; A child is a vulnerable client and should be advocated for; Atraumatic care should be provided to each child; Child health care should be family-centered. The essence of the theoretical basis were reilluminated into caring theory and client advocacy theory. The legal basis of CHN was stated as pertaining to the various child-related laws and international conventions, such as UN Convention on the Rights of the Child. The ethical basis were stated as 4 principles of biomedical ethics and The UNESCO Universal Declaration on Bioethics and Human Rights. The mission of the CHN was stated and the role of CHN was described as one who is a child rights advocator, professional caring service provider, policy maker, health educator, researcher.

선천성수신증 환아에서 방광요관역류 및 요로감염 발생에 대한 고찰 (Vesicoureteral Reflux and Urinary Tract Infection in Children with Congenital Hydronephrosis)

  • 김종호;곽재령;박지민;배기수
    • Childhood Kidney Diseases
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    • 제13권2호
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    • pp.222-228
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    • 2009
  • 목적 : 선천성 수신증 환아에서 방광요관역류(VUR)가 어떠한 관련이 있는지 또한 요로감염 발생 여부와 어떠한 연관이 있는지 정보가 부족하다. 이에 연구자들은 VCUG를 시행 받은 선천성 수신증 환아를 대상으로, 수신증과 VUR 간의 연관성 및 요로감염 발생 여부에 대하여 분석을 하여 환자관리에 도움이 되는 정보를 마련하고자 하였다. 방법 : 연구는 2002년 1월 1일부터 2008년 12월 31일까지 아주대학교 병원에서 선천성 수신증으로 진단된 생후 1개월 이내의 환아 중, VCUG를 시행 받은 122명을 대상으로 후향적 연구를 하였다. 측정치의 통계분석은 SPSS version 16.0을 사용하여 logistic regression, T-test, chi-square test 등을 실시하였으며, P<0.05인 경우 통계학적으로 유의한 것으로 평가하였다. 결과 : 총 122명의 선천성 수신증 환자 중 남자가 많았고(73%), 주로 편측 수신증을 가진 환자가 많았으며(77%), 그 중 좌측(84.0%) 수신증 환자가 유의하게 많았다. VUR은 총 23명(18.9%)에서 발견되었다. 수신증의 심한 정도는 좌우측에 따른 차이를 보이지 않았으며, VUR의 정도도 좌우측에 따른 차이를 보이지 않았다. 수신증을 1-4단계로 나누었을 때, 각 단계별로 VUR의 발생빈도 차이는 관찰할 수 없었으나, 수신증을 경한 수신증(1-2단계)과 중한 수신증(3-4단계)으로 나누었을 때 중한 수신증에서 VUR의 발생 빈도가 유의하게 높음을 확인할 수 있었다. 또한 영아기 동안에 요로감염 발생을 살펴보면, 수신증이 심하거나 VUR이 있을 경우 그 발생빈도가 높았다. 결론 : 선천성 수신증 환아에서 수신증의 정도가 심할 경우 더욱 VUR의 빈도가 더 높았으며, VUR이 존재할 경우 영아기에 요로감염이 더 흔히 발생함을 알 수 있었다.

과배란처리(過排卵處理)에 대(對)한 Mouse의 배란반응(排卵反應)의 계통차(系統差) (Strains Difference of Ovulatory Response in Mice to Superovulation-treatment)

  • 전창기;이시지마 요시
    • 농업과학연구
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    • 제5권2호
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    • pp.77-79
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    • 1978
  • 본(本) 연구(硏究)는 5계통(系統)(CF#1, C57BL/6, ICR, dd, CHN)의 mouse에 있어서 과배란처리(過排卵處理)에 대한 반응차(反應差)를 조사(調査)하기 위하여 수행(遂行)되었다. 과배란처리(過排卵處理)는 5IU의 PMS를 피하(皮下)에 주사(注射)한 다음 58시간(時間) 후(後)에 5IU의 HCG를 피하주사(皮下注射)하였으며, 배란수(排卵數)의 조사(調査)는 HCG 주사(注射) 24시간후(時間後)에 도살(屠殺)하여 난관내(卵管內)의 난자수(卵子數)를 현미경하(顯微鏡下)에서 계정(計定)하였다. 평균배란수(平均排卵數)는 CF#1, C57BL/6, ICR, dd 및 CHN계통(系統)에서 각각 21.3, 17.9, 20.7, 21.0 및 20.5개였다.

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'Chinese Herb Nephropathy'란 용어는 올바른 것인가? (Is the term of Chinese Herb Nephropathy proper?)

  • 최기림;이진신;장원만;안영민;안세영;두호경;이병철
    • 대한한방내과학회지
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    • 제21권4호
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    • pp.543-548
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    • 2000
  • After Vanherweghem J-L reported the rapidly progressive interstitial renal fibrosis that developed in patients taking the slimming preparation compounded with chinese Herb in Belgium 1993. Chinese Herb Nephropathy(CHN) has become known as a new renal disease, CHN is described as the decrease of urinary renal enzyme, neutral endopeptidase(NEP). N-acetyl-${\beta}$-Dglucosaminidase(NAG). increase of urinary low molecular protein, ${\alpha}$1-microglobulin, ${\beta}$2-microglobulin. clara cell protein(CC16), retinol-binding protein(RBP) in clinical findings, and the proximal tubular atrophy, interstitial fibrosis. urothelial atrophy. glomerular sclerosis in histology, Because CHN was caused by Chinese herb contained in slimming preparation, western medical doctors have thought that all Herb medicine might have caused renal disease and prohibit the taking of any Herb medicine, However. CHN was actually caused by the aristolochic acid contained in some Herb medicines. Aristolochia manshuriensis, Aristolochia fang chi, which is the substitutions of Akebia quinata, Stephania tetrandra has being used in clinical. Aristolochia manshuriensis. Aristolochia fang chi were different with Akebia quinata. Stephania tetrandra in botany, and it have not been classified with medicines in Oriental medicine, That is, the aristolochic acid, not Herb medicines. causes CHN, So, Chinese Herb Nephropathy should be changed to Aristolochic acid Nephropathy.

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수입 옥수수들의 TME가와 In vitro 방법에 의해 측정한 ME가의 비교 (Comparison of TME Values of Imported Corns and ME Values Determined by In vitro Method)

  • 조중호;백인기;현영
    • Journal of Animal Science and Technology
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    • 제49권6호
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    • pp.737-744
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    • 2007
  • 수입 옥수수들의 TME가를 구하고 진정 아미노산 이용율(TAAA) 그리고 여타 진정 영양소 이용율을 측정하기 위하여 57주령 된 Hy-Line rooster 24수를 대사 케이지에 수용하고 미국산 (USA), 아르헨티나산(ARG), 중국산(CHN), 중국산‐premium(CHNP) 등 원산지별로 5수씩 공시하였고 내인성 에너지가와 아미노산을 측정하기 위해 4수를 절식구로 두어 총 4회에 걸쳐 4주 간격을 두고 대사시험을 실시하였다. 얻어진 TME값은 In vitro 방법에 의해 측정한 MEn, ME 그리고 MEpc와의 상관계수를 구하였다. 풍건물(as fed) 기준으로 한 TME 값에 있어서 USA구가 3,745로 ARG구 3,555 그리고 CHNP구 3,517 보다 유의하게(P<0.01) 높았고 CHN구 3,671kcal/kg와는 유의한 차가 없었다. 건물(DM) 기준 TME 값은 USA구가 4,144로 CHN구 4,060와 CHNP구 4,008과는 유의한 차가 없었으나 ARG구 4,001kcal/kg 보다는 유의하게(P<0.05) 높았다. 옥수수의 phenylalanine, histidine 그리고 arginine의 TAAA는 수입 옥수수간에 유의한 차이가 있었는데 USA가 가장 높았다. 그러나 전체 아미노산의 TAAA에 있어서는 유의차가 없었으나 USA 옥수수가 89.4%로 다른 원산지 옥수수들인 ARG 89.3%, CHN 89.1%, CHNP 86.5% 보다 다소 높았다. 영양소 이용률에 있어서 NFE 이용율은 USA, ARG 그리고 CHN 옥수수가 CHNP 옥수수 보다 유의하게(P<0.05) 높았으며 조단백, 조지방, 조섬유 및 조회분의 이용율에는 시료간에 유의한 차가 없었다. TME가와 In vitro 방법에 의해 측정된 MEn가 사이의 상관계수는 0.91로 P<0.1이었으나 TME가와 ME가 그리고 TME가와 MEpc가 사이에서의 상관계수는 각각 0.90과 0.83으로 P>0.1이었다. 결론적으로 미국산 옥수수가 TME값과 아미노산 이용율이 가장 높았고 중국산 premium corn은 중국산 regular corn과 비교했을 때 유의한 차이가 없었다. In vitro 방법으로 옥수수의 TME가를 추정할 경우 MEn값 산출 공식을 이용하는 것이 적합하다고 사료된다.

Estimating Benchmark Dose and Permissible Intake Level Using Subchronic Toxicity Data of Aristolochia Contorta

  • Lee, Hyomin;Eunkyung Yoon;Myungsil Hwang;Lee, Geunyung;Jisun Yang;Kihwa Yang;Kwangsup Kil
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2002년도 Molecular and Cellular Response to Toxic Substances
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    • pp.198-198
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    • 2002
  • Occurrence of Chinese Herbs Nephropathy (CHN) has been reported in young women who had taken a slimming pills containing some chinese herbs. Aristolochic acid (AA) known as a carcinogen, was suspected as the major causal factor of CHN. AA is major component of fruit of A. contorta was used in Korean Traditional Medicine.(omitted)

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