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안종국,정일민,주호종 建國大學校 附設 農業資源開發硏究所 1997 農資源開發論集 Vol.19 No.-
ABSTRACT Experiment was conducted to investigate the variation of grain quality in a panicle at experimental farm and laboratory of Kon Kuk University from April 1996 to March 1997.Spikelet number on the primary branch was ranged 5 to 6. However, spikelet number on the secondary branch was ranged 3 to 4.Total spikelet number on primary branches in a panicle was about 50 % in Hwaryeongbyeo and Chucheongbyeo. But it was only 35 % in Dasanbyeo which had a lot of secondary branches.Grain weight in the secondary branches were lighter than those in the primary branches. Protein content of milled rice in the primary branches was lower than that of milled rice in secondary branches, while amylose content of milled rice in primary branches was higher than that of milled rice in secondary branches. Protein content of milled rice on the upper part of branches was lower than that on the lower part of branches, while amylose content of milled rice on the upper part of branch was higher than that on the lower part branches in Chucheongbyeo. Fat acidity of rice flour on the primary branches showed lower value than on the secondary branches. Iodine blue value was the same as fat acidity value. Hardness of brown rice on the primary branches was stronger than on the secondary branches.
Ju, Jin-Sook,Choi, Hyo-Soon,Lee, Ho-Jeong,Jung, Chang-young,Lee, Kwang-Ryeol,Bae, Yong-Chul,Ahn, Dong-Kuk Korean Academy of Oral Biology and the UCLA Dental 2004 International Journal of Oral Biology Vol.29 No.2
The present study was performed to examine the antinociceptive effect after microinjection of DAMGO, DPDPE, or U50488 into the central nucleus of the amygdala. Experiments were carried out on 74 male SD rats weighing 350-400 gm and surgical procedures were performed under pentobarbital sodium (40 mg/kg, ip). Anesthetized rats were mounted on a stereotaxic frame and a stainless steel guide cannula (26 gauge) was implanted in the central part of right amygdala and the lateral cerebral ventricle respectively. A 48-hour recovery period from surgery was allowed before starting the recording sessions. The nociceptive jaw opening reflex was recorded in freely moving rats. After injection of 3 or 6 nM DAMGO into the central nucleus of amygdala, digastric electromyogram (dEMG) was suppressed to 74±8% or 43±5 of the control. However, DPDPE or U50488 did not affect dEMG. Intra amygdaloid injection of naloxone blocked the suppression of dEMG in response to microinjection of DAMGO from 46±9 to 95±5% of the control. The dEMG activity was observed after intracerebroventricular injection of naloxone, methysergide, or phentolamine. Naloxone blocked the suppressive effect of DAMGO from 31±9 to 82±11% of the control. Methysergide also blocked the suppressive effect of DAMGO from 39±5 to 61±9m% of the control. However, phentolamine, an a-adrenergic receptor antagonist, did not affect the suppression of dEMG. These results suggest that amygdaloid mu opioid agonist but not delta kappa receptor agonist produce an antinociceptive action in the orofacial area. The antinociception of amygdaloid DAMGO seems to be mediated by opioids and serotonergic pathways.
Colorimetric detection of endogenous hydrogen sulfide production in living cells
Ahn, Yong Jin,Lee, Young Ju,Lee, Jaemyeon,Lee, Doyeon,Park, Hun-Kuk,Lee, Gi-Ja Elsevier 2017 Spectrochimica acta. Part A, Molecular and biomole Vol.177 No.-
<P><B>Abstract</B></P> <P>Hydrogen sulfide (H<SUB>2</SUB>S) has received great attention as a third gaseous signal transmitter, following nitric oxide and carbon monoxide. In particular, H<SUB>2</SUB>S plays an important role in the regulation of cancer cell biology. Therefore, the detection of endogenous H<SUB>2</SUB>S concentrations within biological systems can be helpful to understand the role of gasotransmitters in pathophysiology. Although a simple and inexpensive method for the detection of H<SUB>2</SUB>S has been developed, its direct and precise measurement in living cells remains a challenge. In this study, we introduced a simple, facile, and inexpensive colorimetric system for selective H<SUB>2</SUB>S detection in living cells using a silver-embedded Nafion/polyvinylpyrrolidone (PVP) membrane. This membrane could be easily applied onto a polystyrene microplate cover. First, we optimized the composition of the coating membrane, such as the PVP/Nafion mixing ratio and AgNO<SUB>3</SUB> concentration, as well as the pH of the Na<SUB>2</SUB>S (H<SUB>2</SUB>S donor) solution and the reaction time. Next, the <I>in vitro</I> performance of a colorimetric detection assay utilizing the silver/Nafion/PVP membrane was evaluated utilizing a known concentration of Na<SUB>2</SUB>S standard solution both at room temperature and at 37°C in a 5% CO<SUB>2</SUB> incubator. As a result, the sensitivity of the colorimetric assay for H<SUB>2</SUB>S at 37°C in the incubator (0.0056Abs./μM Na<SUB>2</SUB>S, R<SUP>2</SUP> =0.9948) was similar to that at room temperature (0.0055Abs./μM Na<SUB>2</SUB>S, R<SUP>2</SUP> =0.9967). Moreover, these assays were less sensitive to interference from compounds such as glutathione, <SMALL>L</SMALL>-cysteine (Cys), and dithiothreitol than to the H<SUB>2</SUB>S from Na<SUB>2</SUB>S. This assay based on the silver/Nafion/PVP membrane also showed excellent reproducibility (2.8% RSD). Finally, we successfully measured the endogenous H<SUB>2</SUB>S concentrations in live C6 glioma cells by s-(5′-adenosyl)-<SMALL>L</SMALL>-methionine stimulation with and without Cys and <SMALL>L</SMALL>-homocysteine, utilizing the silver/Nafion/PVP membrane. In summary, colorimetric assays using silver/Nafion/PVP-coated membranes can be simple, robust, and reliable tools for the detection of H<SUB>2</SUB>S that can avoid the complicated and labor-intensive analytical approach used in conventional biology. In addition, we expect that this assay will demonstrate a powerful ability to study pathophysiological pathways that involve H<SUB>2</SUB>S.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We developed a simple and facile colorimetric system for selective H<SUB>2</SUB>S gas detection. </LI> <LI> The silver/Nafion/PVP membrane was coated on the underside of a microplate cover. </LI> <LI> This assay showed high selectivity, good sensitivity, and excellent reproducibility. </LI> <LI> We successfully measured the endogenous H<SUB>2</SUB>S levels in live C6 glioma cells. </LI> </UL> </P> <P><B>Graphical Abstract</B></P> <P>[DISPLAY OMISSION]</P>
Kim, Hyun Kuk,Hong, Young Joon,Jeong, Myung Ho,Kim, Weon,Kim, Sung Soo,Ko, Jum Suk,Lee, Min Goo,Sim, Doo Sun,Park, Keun Ho,Yoon, Nam Sik,Yoon, Hyun Ju,Kim, Kye Hun,Park, Hyung Wook,Kim, Ju Han,Ahn, Yo The Korean Association of Internal Medicine 2011 The Korean Journal of Internal Medicine Vol.26 No.1
<P><B>Background/Aims</B></P><P>Carvedilol is an antioxidant that inhibits smooth muscle cell proliferation and migration. The aim of this study was to investigate the beneficial effects of carvedilol-loaded stents on 2-year clinical outcomes after stent implantation in patients with coronary artery disease.</P><P><B>Methods</B></P><P>We performed a prospective trial with male subjects to compare the safety and effects of carvedilol-loaded BiodivYsio® stents implanted into 20 patients with those of bare-metal BiodivYsio® stents implanted into 21 patients for de novo coronary lesions. The primary end point was the degree of neointimal hyperplasia, which was measured by intravascular ultrasound (IVUS) 6 months after the procedure; the secondary end point was major adverse cardiac events (MACE) at 2 years after implantation. All carvedilol and control stents were deployed successfully.</P><P><B>Results</B></P><P>A 2-year follow-up was completed for 19 patients (95%) in the carvedilol stent group and 20 patients (95%) in the control stent group. IVUS showed a trend toward a larger luminal area (6.86 ± 2.59 vs. 5.47 ± 1.52 mm<SUP>2</SUP>, <I>p</I> = 0.267), smaller neointimal area (1.34 ± 0.70 vs. 2.40 ± 1.73 mm<SUP>2</SUP>, <I>p</I> = 0.18), and reduced net decrease in luminal area (-0.78 ± 0.97 vs. -1.89 ± 1.78 mm<SUP>2</SUP>, <I>p</I> = 0.106) in the carvedilol stent group compared with the control stent group, respectively. There were no significant differences in the incidence of MACE (10.5 vs. 30.0%, respectively, <I>p</I> = 0.132) between the groups at 2 years after stent implantation. Stent thrombosis did not occur in either group after 2 years.</P><P><B>Conclusions</B></P><P>The carvedilol-loaded stents tended to inhibit neointimal hyperplasia without the occurrence of cardiac death, myocardial infarction, or stent thrombosis at 2-year follow-up.</P>
Lee, Young Ju,Ahn, Hyung Joon,Lee, Gi-Ja,Jung, Gyeong Bok,Lee, Gihyun,Kim, Dohyun,Shin, Jae-Ho,Jin, Kyung-Hyun,Park, Hun-Kuk SPIE - International Society for Optical Engineeri 2015 Journal of biomedical optics Vol.20 No.7
<P>The study was to investigate the changes in biochemical properties of activated mature CD8+ T cells related to apoptosis at a molecular level. We confirmed the activation and apoptosis of CD8+ T cells by fluorescence-activated cell sorting and atomic force microscopy and then performed Raman spectral measurements on activated mature CD8+T cells and cellular deoxyribose nucleic acid (DNA). In the activated mature CD8+ T cells, there were increases in protein spectra at 1002 and 1234 cm(-1). In particular, to assess the apoptosis-related DNA spectral signatures, we investigated the spectra of the cellular DNA isolated from resting and activated mature CD8+ T cells. Raman spectra at 765 to 786 cm(-1) and 1053 to 1087 cm(-1) were decreased in activated mature DNA. In addition, we analyzed Raman spectrum using the multivariate statistical method including principal component analysis. Raman spectra of activated mature DNA are especially well-discriminated from those of resting DNA. Our findings regarding the biochemical and structural changes associated with apoptosis in activated mature T cells and cellular DNA according to Raman spectroscopy provide important insights into allospecific immune responses generated after organ transplantation, and may be useful for therapeutic manipulation of the immune response. (C) The Authors. Published by SPIE</P>
Do. Eun-Ju,Yang. Eun-Kyoung,Kim. Kyung-Soon,Kim. Suk-Hee,Park. Yoon-Yub,Ahn. Dong-Kuk,Park. Jae-Sik,Lee. Won-Jung 대한생리학회 1995 대한생리학회지 Vol.29 No.2
The renin-angiotensin system plays an important role in the regulation of blood pressure and in body fluid homeostasis. There is increasing evidence for generation of endogenous angiotensin II in many organs and for its role in paracrine functions. Studies were designed to investigate whether hemorrhage produces rapid changes in the gene expression of angiotensinogen in peripheral and brain tissues. Wistar rats received saline drinking water for 7 days, were bled at a rate of 3mlkg<sup>-1</sup> min<sup>-1</sup> for 7 min, and then decapitated 0, 2, 4, 8, or 24 hr after hemorrhage. Hemorrhage produced a produced hypotension with tachycardia at 2±8 hr, but blood pressure and heart rate had not fully recovered to the basal level at 24 hr. Plasma renin concentration was significantly increased at 2, 4, and 8 hr (maximum sixfold increase at 4 hr) and had returned to the basal level at 24 hr. Renal renin content was significantly increased only at 4 hr after hemorrhage. Angiotensinogen mRNA in both the kidney and liver were stimulated at 2 to 8 hrs, but recovered to the basal level at 24 hr. On the other hand, angiotensinogen mRNA levels il the hypothalamus and brainstem were continuously increased from 2 to 24 hrs. The present study demonstrates the presence of angiotensinogen mRNA in both hepatic and extrahepatic tissues, and more importantly, their up-regulation after hemorrhage. These results suggest that the angiotensinogen-generating systems in the liver, kideny and brain are, at least in part, under independent control and play a local physiological role.