• Journal of Biosystems Engineering
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• 제30권2호
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• pp.114-120
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• 2005

In this study, a biological reaction and measurement control system was developed to rapidly measure the insecticide imidacloprid residues in agricultural products. The biological reaction part of the system was designed to include micro-pumps and valves for fluid transport, and a polystyrene covet as a reaction chamber. The measurement control part of the system consisted of a photodiode with a light-emitting diode for optical density measurement, and a control microcomputer to implement assay. Signal output was read as the rate of change in optical density at 645 nm. The sensitivity of the system was 2.2 ng/mL ($IC_50$). The system could execute a measurement cycle in about 19 minutes. Research will be continued to develop an automatic sampler fur imidacloprid residues from agricultural products.

• 한국환경농학회:학술대회논문집
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• 한국환경농학회 2011년도 30주년 정기총회 및 국제심포지엄
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• pp.281-281
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• 2011

• 한국환경농학회:학술대회논문집
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• 한국환경농학회 2011년도 30주년 정기총회 및 국제심포지엄
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• pp.291-291
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• 2011

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.362.2-362.2
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• 2002

Antofine belongs to the Phenathroindolizidine group of alkaloids. This natural products exhibit interesting biological properties such as antitumour activity. and anti-inflammentory. Wittig reaction of phenathrenealdehyde with the phosponium salt provided the phenathreneazidealkene in good yield. Intramolecular 1.3-dipolar cycloaddition of the resulting azidealkent in refluxing benzene proceeded the imine. It was reduced with cyanoborohydride of Noyori's Asymmetric Hydrogenation. (omitted)

• Natural Product Sciences
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• 제19권2호
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• pp.77-119
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• 2013

The genus Patrinia, belonging to the Valerianaceae family, includes ca. 20 species of herbaceous plants with yellow or white flowers, distributed in Korea, China, Siberia, and Japan. Among them, P. scabiosaefolia (yellow Patrinia), P. saniculaefolia, P. villosa (white Patrinia), and P. rupestris are found in Korea. Several members of this genus have long been used in folk medicine for the treatment of inflammation, wound healing, ascetics, and abdominal pain after childbirth. Thus far, ca. 217 constituents, namely flavonoids, iridoids, triterpenes, saponins, and others have been identified in this genus. Crude extract and isolated compounds have been found to exhibit anticancer, anti-inflammatory, antioxidant, antifungal, antibacterial, cytotoxic activities, lending support to the rationale behind several of its traditional uses. The present review compiles information concerning the phytochemistry and biological activities of Patrinia, with particular emphasis on P. villosa, as studied by our research group.

• 응용통계연구
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• 제25권1호
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• pp.125-138
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• 2012

최근 들어 바이오시밀러에 대한 국내외 관심이 매우 증가하고 있다. 바이오시밀러가 오리지널 생물의약품과 효능과 안전성이 유사함을 보이기 위해서는 최종적으로 임상시험을 수행하여야 한다. 본 논문에서는 이러한 임상시험의 수행과 통계적 분석에 필요한 여러 방법들과 외국의 사례 그리고 관련된 가이드라인들을 살펴볼 것이다.

• Archives of Pharmacal Research
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• 제11권1호
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• pp.41-44
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• 1988

Several 4-cyano-1-benzofuranyl-1-butanone derivatives were synthesized and screened for potential antiinflammatory and analgesic activities. The effect of structural variation of these molecules on biological activities was systematically examined. Among these compounds $V_a,\;V_c\;and\;VI_e$ were found to demonstrate a significant antiinflammatory effect. Compounds $VI_e,\;V_a,\;I_d,\;I_band\;VII_f$ were also significantly effective as analgesic ones.

• Journal of Microbiology and Biotechnology
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• 제32권7호
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• pp.911-917
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• 2022

As valuable antibiotics, microbial natural products have been in use for decades in various fields. Among them are polyene compounds including nystatin, amphotericin, and nystatin-like Pseudonocardia polyenes (NPPs). Polyene macrolides are known to possess various biological effects, such as antifungal and antiviral activities. NPP A1, which is produced by Pseudonocardia autotrophica, contains a unique disaccharide moiety in the tetraene macrolide backbone. NPP B1, with a heptane structure and improved antifungal activity, was then developed via genetic manipulation of the NPP A1 biosynthetic gene cluster (BGC). Here, we generated a Streptomyces artificial chromosomal DNA library to isolate a large-sized NPP B1 BGC. The NPP B1 BGC was successfully isolated from P. autotrophica chromosome through the construction and screening of a bacterial artificial chromosome (BAC) library, even though the isolated 140-kb BAC clone (named pNPPB1s) lacked approximately 8 kb of the right-end portion of the NPP B1 BGC. The additional introduction of the pNPPB1s as well as co-expression of the 32-kb portion including the missing 8 kb led to a 7.3-fold increase in the production level of NPP B1 in P. autotrophica. The qRT-PCR confirmed that the transcription level of NPP B1 BGC was significantly increased in the P. autotrophica strain containing two copies of the NPP B1 BGCs. Interestingly, the NPP B1 exhibited a previously unidentified SARS-CoV-2 RNA-dependent RNA polymerase (RdRp) inhibition activity in vitro. These results suggest that the Streptomyces BAC cloning of a large-sized, natural product BGC is a valuable approach for titer improvement and biological activity screening of natural products in actinomycetes.

• 한국미생물·생명공학회지
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• 제42권2호
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• pp.106-113
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• 2014

대추 및 포도를 이용하여 고부가가치성 소재 개발 및 특화작물로서 개발하기 위하여 이들을 이용한 알코올 발효와 초산 발효를 한 후 발효물들의 생리활성을 검증하였다. 항산화 활성을 측정결과 초산 발효물보다 알코올 발효물이 우수한 활성을 나타내었으며, 그 중 대추의 알코올 발효물이 다른 발효물보다 높은 항산화 활성을 나타내었다. 미백효과 측정결과 또한 대추의 알코올 발효물이 우수한 효능을 나타내었으나, immunofluorecence를 이용한 미백효과측정결과 대추의 초산 발효물이 미백에 관련된 단백질 발현을 저해하는 것으로 나타내었다. 대추 및 포도의 발효물들은 대식세포에서 lipopolysaccharide에 의해 생성된 nitric oxide를 농도 의존적으로 감소시켰으며, 알코올 발효물이 초산 발효물보다 우수한 효능을 나타내었다. 발효물들의 항균력을 측정한 결과 포도의 초산 발효물이 Propionibacterium acnes를 제외한 모든 균주에 항균력을 나타내었으며, Escherichia coli에 대해서는 포도의 알코올 발효물과 대추의 알코올 발효물이 높은 항균력을 나타내었다.

• 농약과학회지
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• 제16권1호
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• pp.43-53
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• 2012

국내 유통 친환경인증 엽채류와 엽경채류 중 잔류농약 실태를 파악하기 위해 서울 등 전국 9개 지역의 대형마트와 친환경인증 농산물 판매소에서 상추 등 21종의 친환경인증 엽채류 및 엽경채류를 2010년 7월과 8월 2회 채취 하였으며, 총 시료수는 637(유기농산물 395, 무농약농산물 242)점이었다. 수집된 시료는 GC-ECD/NPD, HPLC-DAD/FLD를 이용한 다성분 동시분석법으로 잔류농약을 분석하였다. 분석 결과 양배추 등 8점의 시료에서 alachlor를 포함한 6종의 농약이 검출되어 1.3%의 검출율을 보였으며, 검출농약의 잔류량은 alachlor 0.043, chlorfenapyr 0.022-0.324, diazinon 0.024, dicofol 0.05-0.138, dithiopyr 0.008, metolachlor 0.025 mg/kg이었다. 시료에서 검출된 농약의 잔류량은 모두 잔류허용기준을 초과하지 않았고 일일섭취추정량 대비 일일섭취허용량은 25% 미만으로 안전한 것으로 판단되었으나 농약이 검출된 시료 중 5점은 친환경농산물 인증기준을 초과하여 부적합 농산물로 분류되었다.