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토착 야초류(어저귀, 자귀풀)의 수경재배를 이용한 2,4,6-trinitrotoluene(TNT) 분해 연구
권영석 ( Kwon Yeong Seog ),김동일 ( Kim Dong Il ),정연규 ( Jeong Yeon Gyu ),배범한 ( Bae Beom Han ),이인숙 ( Lee In Sug ),장윤영 ( Jang Yun Yeong ) 한국물환경학회 2004 한국물환경학회지 Vol.20 No.1
In this study, uptake and translocation of 2,4,6-trinitrotoluene(ThT) by plant in a hydroponic culture was quantified with two indigenous plant species, Aeschynomene indica and Abutilon avicennae on various initial concentrations of TNT ranging from 20 to 80 ㎎TNT/L. Experiments were sterilized to exclude the activity of microorganisms and conducted in duplicate. Weight loss of two plant species in added TNT culture media was higher than in control. At over 20㎎TNT/L, there appeared to be phytotoxicity from TNT as indicated by severe yellow-chlorosis and increase of falling leaves. TNT removal rate normalized(K) to the plant fresh weight of Abutilon avicennae and Aeschynomene indica was that the higher TNT concentrations resulted in lower TNT removal rate normalized(K) to the plant fresh weight. Approximately 96% of the TNT in viable microflora-hydroponic culture was removed after 96h of the experiments.
Kwon, Jeong-eun,Lee, Seon-Yeong,Seo, Hyeon-Beom,Moon, Young-Mee,Ryu, Jun-Geol,Jung, Kyung-Ah,Jhun, Joo-Yeon,Park, Jin-Sil,Hwang, Soo-Seok,Kim, Joo-Myeong,Lee, Gap Ryol,Park, Sung-Hwan,Cho, Mi-La Elsevier 2018 Immunology letters Vol.197 No.-
<P><B>Abstract</B></P> <P>Yin Yang 1 (YY1) is a ubiquitously expressed transcription factor that functions in cooperation with various cofactors to regulate gene expression. In the immune system, YY1 enhances cytokine production and T helper (Th) 2 effector cell differentiation, resulting in the activation of inflammation. However, no studies have reported the role of YY1 in Th17 cell regulation, which is implicated in rheumatoid arthritis (RA). We investigated the expression of YY1 in Th17 cells <I>in vitro</I> and revealed increased levels of YY1 mRNA and protein. To elucidate the function of YY1 pathogenesis in RA, we used a collagen-induced arthritis (CIA) mouse model with YY1 deficiency. Deficiency of YY1 reduced the severity of arthritis and joint destruction. Moreover, Th17 cells were dramatically reduced in YY1-deficient mice. The cytokine interleukin (IL)-17 was decreased in YY1-deficient CD4+ T cells <I>ex vivo</I> and <I>in vivo</I>. Interestingly, the level of signal transducer and activator of transcription 3 (STAT3), tumor necrosis factor-α, IL-17, IL-6, and IL-1β were markedly decreased in YY1-deficient mice with CIA. The cytokine-inducing function of YY1 was more specific to IL-17 than to interferon-γ. YY1 plays a role in Th17 cell differentiation and RA pathogenesis. Our findings suggest that future RA therapies should target the regulatory mechanism involved in Th17 cell differentiation, in which YY1 may cooperate with the STAT3 signaling pathway.</P> <P><B>Highlights</B></P> <P> <UL> <LI> YY1 as new target for RA therapies involved in Th17 cell differentiation. </LI> </UL> </P>
Somatostatin 수용체 스캔에 양성인 갑상선 여포선종이 동반된 말단비대증 1예
권석호,황영웅,박용범,윤용석,원영준,임승길,이현철,허갑범 대한내과학회 1997 대한내과학회지 Vol.53 No.3S
말단비대증으로 진단된 48세 여자에서 somatostatin 수용체 스캔에 양성인 갑상선종양을 발견하여, 병리소견상 갑상선 여포선종으로 밝혀진 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Recently, the new technique that allows the in vivo visualization in man of the somatostatin receptor positive tumor after iv adminstration of the 123I-coupled somatostatin analogue Tyr-octreotide (somatostatin receptor scan) was developed. We have experienced a forty eight-year-old female patient with acromegaly and multiple thyroid nodules. Somatostatin receptor scan was performed. Unexpectedly, both pituitary tumor and multiple thyroid nodules were presented with positive by somatostatin receptor scan and we thought that multiple thyroid nodules might be malignancy, probably medullary thyroid carcinoma. Therefore, bilateral subtotal thyroidectomy was performed and pathologic finding showed thyroid follicular adenoma.
Beom Soo Kim,Jae Yong Song,Eun-Yeong Kwon 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.12
Silver nanoparticles are used in many industries due to their disinfection and antibacterial properties. Biological methods of nanoparticle synthesis have been suggested as possible ecofriendly alternatives to chemical and physical methods. In this study, biologically synthesized silver nanoparticles using Magnolia kobus leaf extract were coated on the surface of latex foam products using dip coating (exposure to nanoparticle solution) or ultrasonic treatment. SEM image of the treated foam showed that silver nanoparticles were uniformly coated on the surface of latex foam. Antibacterial properties were tested by counting viable Escherichia coli cells after 24 h growth in shake flask cultures containing latex foams coated with silver nanoparticles. Foams coated with silver nanoparticles showed higher antibacterial activities compared with foams untreated. Smaller silver nanoparticles synthesized at higher temperature showed higher antibacterial activity due to the larger specific surface area and higher content of silver nanoparticles. The growth of E. coli decreased with increasing the concentration of silver nanoparticles. Ultrasonic treatment showed higher adsorption and lower desorption of silver nanoparticles to and from the foams compared with dip coating, resulting in higher antibacterial activity.