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오픈케이슨기초의 침하촉진을 위한 AIR-JET 공법의 적용성 분석
박진원,류제천,임희대 忠南大學校 産業技術硏究所 2003 산업기술연구논문집 Vol.18 No.2
By air jet method, settlement time was much decreased and settlement was reached even to the depth which conventional method could not. The friction reduction increased more than 20 to 30%. In addition to this merits, air jet method can make caisson settlement without separating loading or increasing dead loads. By this method, size of caisson sections can be reduced for resulting in tremendous cost reduction. Also, caisson damage by blasting can be prevented with this method.
권진욱,이규승,박승희 충남대학교 농업과학연구소 1995 농업과학연구 Vol.22 No.2
In order to find a way to utilize paper mill sludge, its composting was conducted with anaerobic waste of kraft paper sludge, raw kraft paper sludge, and CMC sludge(CMC : Sodium Carboxymethylcellulose) under aerobic condition at 50℃. It took 3 days for initial fermentation with anaerobic waste and CMC sludge, and six days with raw kraft paper sludge. Each compost was applied to radish(Rhaphanus Stativus L.), and absorption rate of staple nutrients increased 6.7~9.3 times higher in N, 17~21 times in P and 2~3 times in K than control at the harvesting stage. Also, organic matter contents were increased 1.5~2.3 times 4.5~5.3 times in CEC compared to control soil.
DJ-1 deficiency impairs synaptic vesicle endocytosis and reavailability at nerve terminals
Kyung, Jae Won,Kim, Jin-Mo,Lee, Wongyoung,Ha, Tae-Young,Cha, Seon-Heui,Chung, Kyung-Hwun,Choi, Dong-Joo,Jou, Ilo,Song, Woo Keun,Joe, Eun-Hye,Kim, Sung Hyun,Park, Sang Myun National Academy of Sciences 2018 Proceedings of the National Academy of Sciences Vol.115 No.7
<P>Mutations in DJ-1 (PARK7) are a known cause of early-onset autosomal recessive Parkinson's disease (PD). Accumulating evidence indicates that abnormalities of synaptic vesicle trafficking underlie the pathophysiological mechanism of PD. In the present study, we explored whether DJ-1 is involved in CNS synaptic function. DJ-1 deficiency impaired synaptic vesicle endocytosis and reavailability without inducing structural alterations in synapses. Familial mutants of DJ-1 (M26I, E64D, and L166P) were unable to rescue defective endocytosis of synaptic vesicles, whereas WT DJ-1 expression completely restored endocytic function in DJ-1 KO neurons. The defective synaptic endocytosis shown in DJ-1 KO neurons may be attributable to alterations in membrane cholesterol level. Thus, DJ-1 appears essential for synaptic vesicle endocytosis and reavailability, and impairment of this function by familial mutants of DJ-1 may be related to the pathogenesis of PD.</P>
Park, Daehwan,Lee, Jin Yong,Cho, Heui Kyoung,Hong, Woo Jin,Kim, Jisun,Seo, Hyemyung,Choi, Ikjang,Lee, Youngbok,Kim, Juhyeon,Min, Sun-Joon,Yoon, So-Hyun,Hwang, Jae Sung,Cho, Kwang Jin,Kim, Jin Woong American Chemical Society 2018 Biomacromolecules Vol.19 No.7
<P>We herein propose a polymeric nanovehicle system that has the ability to remarkably improve cellular uptake and transdermal delivery. Cell-penetrating peptide-patchy deformable polymeric nanovehicles were fabricated by tailored coassembly of amphiphilic poly(ethylene oxide)-<I>block</I>-poly(ε-caprolactone) (PEO-<I>b</I>-PCL), mannosylerythritol lipid (MEL), and YGRKKRRQRRR-cysteamine (TAT)-linked MEL. Using X-ray diffraction, differential scanning calorimetry, and nuclear magnetic resonance analyses, we revealed that the incorporation of MEL having an asymmetric alkyl chain configuration was responsible for the deformable phase property of the vehicles. We also discovered that the nanovehicles were mutually attracted, exhibiting a gel-like fluid characteristic due to the dipole-dipole interaction between the hydroxyl group of MEL and the methoxy group of PEO-<I>b</I>-PCL. Coassembly of TAT-linked MEL with the deformable nanovehicles significantly enhanced cellular uptake due to macropinocytosis and caveolae-/lipid raft-mediated endocytosis. Furthermore, the <I>in vivo</I> skin penetration test revealed that our TAT-patchy deformable nanovehicles remarkably improved transdermal delivery efficiency.</P> [FIG OMISSION]</BR>
Park, Jin Soo,Park, Ga Young,Choi, Han Gyul,Kim, Seong Joung,Kim, June Hyun,park, Min Cheol,Kim, Yun Kyung,Han, Sang Yong,Jo, Eun Heui Korean AcupunctureMoxibustion Medicine Society 2017 대한침구의학회지 Vol.21 No.4
Objectives : The purpose of this study was to evaluate the effects of water extracts of Eucommiae cortex (EC), Psoraleae semen (PS), and their combination on receptor activator of nuclear factor-kappa-B ligand (RANKL)-induced osteoclast differentiation. Methods : We assayed the protein expression levels of nuclear factor of activated T-cells, cytoplasmic 1 (NFATc1), c-Fos, mitogen-activated protein kinases (MAPKs), and ${\beta}-actin$ in cell lysates using western blotting. Similarly, mRNA expression levels of NFATc1, c-Fos, tartrateresistant acid phosphate (TRAP), and glyceraldehyde-3-phosphate dehydrogenase, spermatogeni (GAPDHS) from bone marrow macrophages (BMMs) were analyzed using reverse transcription-polymerase chain reaction (RT-PCR). Furthermore, we determined the anti-osteoporotic effects of the water extracts of EC, PS, and their combination in a lipopolysaccharide (LPS)-induced bone-loss mouse model. Results : The in vitro data revealed showed that the combination of EC and PS extract showed a more remarkable inhibition of osteoclast differentiation than each herb did alone. The combination downregulated the induction of c-Fos, NFATc1, and TRAP by suppressing the phosphorylation of p38 and c-Jun N-terminal kinases (JNKs) and inhibiting nuclear factor kappa-light-chain-enhancer of activated B cells ($NF-{\kappa}B$). Lastly, the in vivo data showed that PS reduced the LPS-induced bone erosion. Conclusion : The result of this study suggests that EC and PS could be potential therapeutic agents for bone loss diseases such as osteoporosis.
Park, Cheol,Jeong, Jin-Woo,Lee, Dae-Sung,Yim, Mi-Jin,Lee, Jeong Min,Han, Min Ho,Kim, Suhkmann,Kim, Heui-Soo,Kim, Gi-Young,Park, Eui Kyun,Jeon, You-Jin,Cha, Hee-Jae,Choi, Yung Hyun MDPI 2018 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.19 No.8
<P>Osteoarthritis (OA) is a degenerative joint disease that is characterized by irreversible articular cartilage destruction by inflammatory reaction. Among inflammatory stimuli, interleukin-1β (IL-1β) is known to play a crucial role in OA pathogenesis by stimulating several mediators that contribute to cartilage degradation. Recently, the marine brown alga <I>Sargassum serratifolium</I> has been reported to exhibit antioxidant and anti-inflammatory effects in microglial and human umbilical vein endothelial cell models using lipopolysaccharide and tumor necrosis factor-α, but its beneficial effects on OA have not been investigated. This study aimed to evaluate the anti-osteoarthritic effects of ethanol extract of <I>S. serratifolium</I> (EESS) in SW1353 human chondrocytes and, in parallel, primary rat articular chondrocytes. Our results showed that EESS effectively blocked the generation of reactive oxygen species in IL-1β-treated SW1353 and rat primary chondrocytes, indicating that EESS has a potent antioxidant activity. EESS also attenuated IL-1β-induced production of nitric oxide (NO) and prostaglandin E<SUB>2</SUB>, major inflammatory mediators in these cells, which was associated with the inhibition of inducible NO synthase and cyclooxygenase-2 expression. Moreover, EESS downregulated the level of gene expression of matrix metalloproteinase (MMP)-1, -3 and -13 in SW1353 chondrocytes treated with IL-1β, resulting in their extracellular secretion reduction. In addition, the IL-1β-induced activation of nuclear factor-kappa B (NF-κB) was restored by EESS. Furthermore, EESS reduced the activation of p38 mitogen-activated protein kinase (MAPK) and phosphatidylinositol-3-kinase (PI3K)/Akt signaling pathways upon IL-1β stimulation. These results indicate that EESS has the potential to exhibit antioxidant and anti-inflammatory effects through inactivation of the NF-κB, p38 MAPK, and PI3K/Akt signaling pathways. Collectively, these findings demonstrate that EESS may have the potential for chondroprotection, and extracts of <I>S. serratifolium</I> could potentially be used in the prevention and treatment of OA.</P>