• 제목/요약/키워드: biological study

검색결과 14,726건 처리시간 0.048초

Preliminary study on the central nervous system depressant effect of Picrorhiza kurrooa Royle. (Scrophulariaceae) in mice models

  • Rahman, Tasmina;Rahman, Khandaker Ashfaqur;Rajia, Sultana;Alamgir, Mahiuddin;Khan, Mahmud Tareq Hassan;Choudhuri, M Shahabuddin Kabir
    • Advances in Traditional Medicine
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    • 제8권4호
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    • pp.448-451
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    • 2008
  • Picrorhiza kurrooa Royle. is a well known medicinal plant among the indigenous medical practitioners of India. Present study is the first time to report the activity on the central nervous system. Preliminary study of the hot water extract showed significant depressant activity on the hole board test as evidenced from the ambulation and head dipping scores. The extract showed better activity compared to diazepam on the duration of pentobarbital induced sleeping time.

수학과 생명과학계열의 협조적 교과과정 개발 방향의 연구 (A Study of Curriculum Renewal of Interdisciplinary between Mathematics and Life & Biological Science)

  • 최은미
    • 한국수학교육학회지시리즈A:수학교육
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    • 제47권3호
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    • pp.337-351
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    • 2008
  • The intersection between mathematics and biology is rapidly expanding. The purpose of this paper is to develop college mathematics curriculum to improve the quantitative and mathematical skills of life & biological science students, and to help them better appreciate the importance and utility of mathematics. We deal with 4 questions. We first study how mathematics plays an important role in biological education and the history of biology. Secondly, we do a case study about partnership between mathematics and biology societies not only in university but in highschool of US, specially via Bio2010 and Math & Bio2010. We then investigate a way to enhance new mathematics curriculum as a service in biological science. Finally, we survey university students' basic background in order to determine the level of curriculum. From our investigation, we suggest some points to renew curriculum.

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유류로 오염된 토양의 생물학적 처리기법에 관한 연구 (A Study on the Biological Remediation Technology for Oil Contaminated Sites)

  • 조재립
    • 한국품질경영학회:학술대회논문집
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    • 한국품질경영학회 2004년도 품질경영모델을 통한 가치 창출
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    • pp.307-312
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    • 2004
  • Contamination of industrial sites has happened by a variety compounds. Petroleum hydrocarbons, which are readily biodegradable, are reported principle contaminats in most industrial sites. Therefore, the use of biological processes will be a promising technology for remediation of industrial sites. This paper addresses the possible use of biological processes in remediation of contaminated industrial sites and discusses the background and main streams of the process. The paper also characterizes representative biological systems developed for application.

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Marine algal flora of Oho-ri, Gosung-gun, Gangwon-do, Korea

  • Bae, Eun Hee;Oak, Jung Hyun;Lee, Eun-Young
    • Journal of Species Research
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    • 제3권1호
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    • pp.79-94
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    • 2014
  • It was found that a total of 94 species of marine algae, 13 green algae, 24 brown algae, and 57 red algae, are living at the seashore of Oho-ri in this study. 739 voucher specimens for 94 species were made based on plants from March to September 2010 at the 3 islets, including Heukdo, Goraebawi, and Juckdo. Voucher specimens were catalogued and deposited in the herbarium of the National Institute of Biological Resources (KB) of Korea.

A Study of Isoetes L. in Korea

  • Jung, Jong-duck;Park, Hong-Keun
    • 한국식물학회:학술대회논문집
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    • 한국식물학회 2000년도 춘계학술발표대회:발표눈문요지록
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    • pp.15-15
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    • 2000
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Phylogenetic Analysis of Mitochondrial DNA Control Region in the Swimming Crab, Portunus trituberculatus

  • Cho, Eun-Min;Min, Gi-Sik;Kanwal, Sumaira;Hyun, Young-Se;Park, Sun-Wha;Chung, Ki-Wha
    • Animal cells and systems
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    • 제13권3호
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    • pp.305-314
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    • 2009
  • The control region of mitochondrial DNA (13516-14619) is located between srRNA and $tRNA^{lle}$ gene in swimming crab, Portunus trituberculatus. The present study was investigated the genetic polymorph isms of the control region in samples of P. trituberculatus collected at coastal waters of the Yellow Sea in Korea. A total of 300 substitution and indel polymorphic sites were identified. In addition to SNPs and indel variation, a hypervariable microsatellite motif was also identified at position from 14358 to 14391, which exhibited 10 alleles including 53 different suballeles. When the hypervariable microsatellite motif was removed from the alignment, 95 haplotypes were identified (93 unique haplotypes). The nucleotide and haplotype diversities were ranged from 0.024 to 0.028 and from 0.952 to 1.000, respectively. The statistically significant evidence for geographical structure was not detected from the analyses of neighbor-joining tree and minimum-spanning network, neither. This result suggest that population of P. trituberculatus are capable of extensive gene flow among populations. We believed that the polymorph isms of the control region will be used for informative markers to study phylogenetic relationships of P. trituberculatus.

인공심장용 폴리머 밸브의 역류 특성 분석 (A study on the performance of the polymer valve in Total Artificial Heart)

  • 이정주;최종훈;이정훈;이서우;엄경식;안재목;민병구
    • 대한의용생체공학회:학술대회논문집
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    • 대한의용생체공학회 1998년도 추계학술대회
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    • pp.241-242
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    • 1998
  • For the aritificial heart valve, two types of valves-polymer and mechanical valve- are generally used. The polymer valve is used as a new low-cost artificial valve. Among the several properties of the artificial valve, the low-regurgitation property is important because it can provide better cardiac output characteristic. So in this study we analyzed and compared the regurgitation property of the mechanical valve which is generally used nowdays and the polymer valve which was made in our group. As results, the polymer valve showed the better regurgitation property compared to the mechanical valve approximately by 3 times, and increased the cardiac output by 10%.

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Suppressive Effect of a Carbohydrate Fraction from Eclipta prostrata on the Apoptosis of the Mouse Splenocytes in Culture

  • Bae, Eun-Kyong;Kim, Na-Ri;Yun, Mi-Jung;Youn, Hyong-Chol;Youn, Kyung-Joon;Lee, Kang-Ro;Youn, Hyun-Joo
    • Biomolecules & Therapeutics
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    • 제16권4호
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    • pp.403-409
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    • 2008
  • Eclipta prostrata grows abundantly in the tropical and the sub-tropical parts of the world including most part of the Korean Peninsula. The plant has been traditionally used for the treatment of a number of inflammatory diseases including hepatitis and enteritis but the nature of its immuno-modulating activity needs more studies. In this study, water-soluble sugar-containing fractions were purified from the herb and their effects on the culture of mouse splenocytes were examined. One of the fractions significantly suppressed apoptosis of the splenocytes in culture, which involves the gene expression regulation of a number of cytokines and cytokine receptors including MIP1-$\beta$. This study could explain an immunological activity of Eclipta prostrata and would lead to identify an immuno-active compound from the plant.

Diversity of Fungi Isolated from Soil of Jeollabuk-do and Chungcheongbuk-do, Korea

  • Yadav, Dil Raj;Adhikari, Mahesh;Kim, Sang Woo;Kim, Hyun Seung;Um, Yong Hyun;Lee, Youn Su
    • 한국균학회소식:학술대회논문집
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    • 한국균학회 2015년도 추계학술대회 및 정기총회
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    • pp.30-30
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    • 2015
  • This study was conducted aiming with the assessment of fungal diversity in soil samples collected from different locations of Jeollabuk-do and Chungcheongbuk-do, Korea. Forty soil samples were collected in 2015 and fungi were isolated through serial dilution technique. Isolated fungi were purified and differentiated according to their morphological and microscopic characteristics. In total, 150 different representative isolates were recovered and the genomic DNA of each isolate was extracted by using QIAGEN$^{(R)}$ Plasmid Mini Kit (QIAGEN Sciences, USA) and the identification of fungi was carried out by sequence analysis of internal transcribed spacer (ITS) region of the 18S ribosomal DNA (18S rDNA). Recovered isolates belonged to 37 family, 67 genera and 108 species. Aspergillus spp., Penicillium spp., Trichoderma spp., Chaetomium spp. And Fusarium spp. were the most dominant taxa in this study. Out of total species, 20 species were identified as new records for Korea.

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