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대식세포에서 산화질소 생성에 대한 當歸 에탄올 추출물의 억제효과
정미영,박히준,정지행,김진용,강전모,이나경,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2007 東西醫學硏究所 論文集 Vol.2007 No.-
Objective : The Angelica gigas Nakai ethanol extract (AGE) was investigated to compare nitric oxide (NO) production and NF-kB activity from RAW 264.7 cells, since NO and nuclear factor-kB(NF-kB) have been shown to be factors implicated In inflammatory disease. Method : AGE was prepared by extracting medicinal herb with 70% (v/v) ethanol solution. We investigated production nitric oxide (NO) and inducible nitric oxide synthase (iNOS) gene expression by ARE in LPS-stimulated RAW 264.7 macrophage cells. We also investigated inhibition of LPS-induced activation of NF-kB on western blot. Result : LPS-induced RAW 264.7 cells increascd NO production and ,iNOS expression. Upon treatment with AGE, nitrite production was significantly inhibited in a concentration-dependent manner compared to the untreated control. AGE inhibited this LPS-induced ,iNOS mRNA and protein in a dose-dependent manner. AGE markedly inhibited the expression of iNOS mRNA and protein at a concentration of 100 μg/ml. LPS-induced RAW 264.7 cells with AGE blocked inhibitory factor-kBα degradation. Conclusion : This study shows that AGE seems to attenuate inflammation through inhibition of NO production and iNOS expression by blockade of NF-kB activation in LPS-stimulated RAW 264.7 cells.
차준용,이정민,모상영,이재달,배기서,홍영기 忠南大學校 産業技術硏究所 1996 산업기술연구논문집 Vol.11 No.2
Fiber-reinforced composite materials are used in a wide variety of applications in the advanced field of industries such as electric clutch, motor, car, space and aviation etc. It is well known that the brake lining made of fiber-reinforced composites show excellent friction and wear properties compared to the conventional asbestos brakes and also are known to have high absorption energy and excellent high temperature properties in braking. In order to endow high friction and wear stability to the commercial brake lining, the waste fiber such as cotton, PAN, PET, nylon,kevlar, glass and it's binary mixture fibers were used the fiber reinforcements. The fiber/phenolic resin system has been carried out by preform molding method. The friction tester was especially designed and prepared for evaluation of frictional properties such as friction coefficient and stability. The physical properties of fiber reinforced composites were investigated in terms of the 3-point bending strength, the properties of friction, and morphology. The results obtained from the work are as follows ; 1. The friction properties of the cotton fiber reinforced composites were similar to those of the commercial brake linings, but in the cases of reinforcement of kevlar, glass. we can improve those properties, 2. The proper amount of organic and inorganic fiber mixtures can improve the properties of friction and the mechanical properties, 3. It is more desirable to manufacture hybrid fiber reinforced composites because single cotton or synthetic fiber reinforced composites aren't improved frictional properties, and 4. On evaluating frictional properties of waste fiber reinforced composites, frictional properties of waste fiber reinforced composites are superior to commercial disc lining. Therefore we can confirm practical possibility of waste fiber reinforced disc lining.
이정범,배준상,민영기,양훈모 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.1
Tropical inhabitants are able to tolerate heat through permanent residence in the tropics. To clarify the peripheral mechanisms of the suppressed thermal sweating in tropical natives, sweating responses to acetylcholine (ACh), a primary transmitter of the sudomotor innervation, were compared between healthy Korean and African males. ACh was iontophoretically administered on the forearm. Directly activated and axon reflex-mediated sweat responses were evaluated by quantitative sudomotor axon reflex test (QSART). The sweating of axon reflex (nicotinic receptor) onset-time was 0.42 min shorter (P<0.01) and the sweat volumes (muscarinic receptors) were 75% (P<0.01) and the ACh sweat volumes of axon reflex (nicotinic receptor) 79% higher (P<0.01) in the Koreans than the Africans. Iodine-impregnated paper method revealed that sweat gland density was 45.1% higher (P<0.01) and sweat gland output per single gland was 18.4% larger (P<0.001) in the Koreans compared to the Africans. These results indicate that suppressed thermal sweating in Africans is, at least in part, attributed to the suppressed glandular sensitivity to ACh through both recruitment of sweat glands and sweat output per each gland.
QTL analysis related to grain qualities under high temperature during ripe stage in rice
Jeong-Ju Kim,Young-Jun Mo,Woon-Cheol Shin,Ki-Young Kim,Jeom-Ho Lee 한국육종학회 2014 한국육종학회 심포지엄 Vol.2014 No.07
This study was conducted to identify quantitative trait loci (QTL) related to grain qualities under high temperature during ripening stage using 187 Korean rice varieties. To analyze grain qualities under high temperature during ripening stage, grain appearance such as head rice and chalky grains percentage and physicochemical characteristics were investigated and SNP genotyping of 187 Korean varieties was conducted for association analysis related with grain qualities under high temperature. Five traits exhibited continuous distributions in the non-glutinous Korean varieties, indicating that these traits are controlled by multiple genes. Association mapping among non-glutinous Korean varieties was conducted using 223 markers showed polymorphism among 384 SNP markers. Six QTLs for chalk grains percentage were mapped to chromosomes 1, 4, 10 and 11. These six QTLs were linked to the SNP marker id1014176 on chromosome 1, id4010924 on chromosome 4, id10000644 on chromosome 10 and id11011505 on chromosome 11, and explained approximately 21, 61, 50, 23, 23 and 21% of the total phenotypic variance. Four QTLs for head rice percentage in chromosomes 4, 10 explained the total phenotypic variance by over 47% and around 20%. Fifteen QTLs for RVA characteristics including hot paste viscosity, peak viscosity and setback viscosity were mapped to chromosome 1, 6, 7, 12 and QTLs were explained around 20% of the total phenotypic variance.
Pedestrian Detection System Using CENTRIST Algorithm on SIMT Based Image Signal Processor
Jun-mo Jeong,Hee-kyeong Jeon,Jong-joon Park 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.12
This paper proposed a pedestrian recognition using CENTRIST algorithm on the basis of SIMT based Image signal processor. The conventional pedestrian recognition used algorithms such as Haar-like feature and HOG, but the huge amount of calculation makes it difficult to operate in real time in a restricted environment such as an embedded environment. This paper sought to improve the operation speed by processing the pedestrian recognition in parallel with the use of SIMT based Image signal processor and CENTRIST algorithm with less amount of calculation compared to other algorithms. The pedestrian recognition implemented in ISP exhibited the improved performance, which is about 2.7 times higher than that of the pedestrian recognition executed by Cortex-A9.
( Jun Mo Jeong ),( Kyoung In Lee ),( Sun Min Kim ) 한국응용생명화학회 2014 Journal of Applied Biological Chemistry (J. Appl. Vol.57 No.1
We aim to develop a simple method for simultaneous and quantitative determination of benzoic acid, caffeic acid and chlorogenic acid in seeds of Eriobotrya japonica. In addition, antibacterial effect of these three phenolic acids was examined. A basic method is performed on the high performance liquid chromatography system coupled to an UV-detector (230 nm) and reverse phase C-18 column (4.6×150 mm, 5 μm). Each phenolic acid was confirmed via liquid chromatography-mass spectrometry (MS)/MS system under the multiple-reaction monitoring with negative-ion electrospray ionization (ESI(-)) mode. It is demonstrated that the method was could be applied to samples for an analytical study of the phenolic acids. On the other hand, three phenolic acids in seeds of E. japonica exhibited antibacterial effect against several pathogenic bacteria. Of these, benzoic acid was found to have stronger antibacterial effect.
Jeong, Sinyoung,Park, Ji Yong,Cha, Myeong Geun,Chang, Hyejin,Kim, Yong-il,Kim, Hyung-Mo,Jun, Bong-Hyun,Lee, Dong Soo,Lee, Yoon-Sik,Jeong, Jae Min,Lee, Yun-Sang,Jeong, Dae Hong Royal Society of Chemistry 2017 Nanoscale Vol.9 No.7
<P>Antibody-conjugated nanoparticles (NPs) have attracted great attention in diagnostic and therapeutic applications due to their high sensitivity and specificity for biotargets, as well as their wide applicability. Unfortunately, these features are significantly affected by antibody conjugation methods in terms of conjugation efficiency, orientation of the target binding site in the antibody, and denaturation during chemical conjugation reactions. Furthermore, the number of conjugated antibodies on each NP and the overall targeting efficacy are critical factors for a quantitative bioassay with antibody-conjugated NPs. Herein, we report a versatile and oriented antibody conjugation method using copper-free click chemistry. Moreover, the number of conjugated antibodies and their binding capacity were quantitatively and experimentally evaluated using fluorescently-labeled antibodies and antigens. The strong binding capability of antibody-conjugated NPs prepared using the copper-free click chemistry-based conjugation strategy was 8 times superior to the binding capability seen following the use of the EDC/NHS-coupling method. Additionally, the versatility of the developed antibody conjugation method was also demonstrated by conjugation of the antibody to three kinds of silica-encapsulated NPs.</P>