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다수 사용자를 위한 QoS 재협상 알고리즘의 설계 및 평가
金昌根,許美京 진주산업대학교 산업과학기술연구소 1996 산업과학기술연구소보 Vol.- No.3
In this paper we propose QOS renegotiation algorithm for supporting continuous media connection in wide-area environment and participating many users. The QOS renegotiation algorithm consists of specification, calculation, establishment and negotiation, renegotiation, and management step. This algorithm is more suitable to various network conditions because each user considers the stream characteristics. Each user has priority for suoporting contiunous connection in network overload situation. As the network server decreases some low priority users' quality rather than all users quality, the whole networks come to safe situation. In multimedia communication system the QOS renetgotiation algorithm has flexibility in renegotiating performance parameters after connection establishment and ability to react to changing network load conditions.
Physiological changes induced by temperature stress in poplar (Populus alba L.)
( Chang Mi Heo ),( Hyun Jin Song ),( Mi Jin Jeong ),( Ji Yun Min ),( Hak Gon Kim ),( Seon Jeong Sim ),( Ji Youp Lee ),( Young Long Seo ),( Byung Hyun Lee ),( Jae Kyeong Yang ),( Myung Suk Choi ) 한국임학회 2011 산림과학 공동학술대회 논문집 Vol.2011 No.-
Storage method and growth regulator on the seed germination of Allium victorialis L
( Mi Jin Jeong ),( Hyun Jin Song ),( Chang Mi Heo ),( Hak Gon Kim ),( Seon Jeong Sim ),( Eun Su Doh ),( Jun Pork Chang ),( Jaekyung Yang ),( Chung Won Yun ),( Myung Suk Choi ) 한국임학회 2011 산림과학 공동학술대회 논문집 Vol.2011 No.-
Noninvasive Monitoring of Bleomycin-induced Lung Injury in Rats Using Pulmonary Function Test
Mi-Jin Yang,Young-Su Yang,Yong-Bum Kim,Kyu-Hyuk Cho,Jeong-Doo Heo,Kyuhong Lee,Chang-Woo Song 한국독성학회 2008 Toxicological Research Vol.24 No.4
The single intratracheal instillation (ITI) of bleomycin (BLM) is a widely used method for inducing experimental pulmonary fibrosis in rat model. In the present study, pulmonary function tests (PFTs) of tidal volume (VT), minute volume (VM), and respiratory frequency (FR) have been applied to study their possibility as a tool to monitor the progress of BLM-induced lung injury in rat model. Rats were treated with a single ITI of BLM (2.5 ㎎/㎏) or saline (control). Animals were euthanized at 3, 7, 14, 21, and 28 days post-ITI. Lung toxicity effects were evaluated by inflammatory cell count, lactate dehydrogenase (LDH) activity in the bronchoalveolar lavage fluid (BALF), and light microscopic examination of lung injury. The PFT parameters were measured immediately before the animals were sacrificed. BLM treatment induced significant cellular changes in BALF-increase in number of total cells, neutrophils, and lymphocytes along with sustained increase in number of macrophages compared to the controls at days 3, 7, and 14. BALF LDH level was significantly increased compared to that in the controls up to day 14. On day 3, infiltration of neutrophils was observed in the alveolar spaces. These changes developed into marked peribronchiolar and interstitial infiltration by inflammatory cells, and extensive thickening of the interalveolar septa on day 7. At 14, 21, and 28 days, mild peribronchiolar fibrosis was observed along with inflammatory cell infiltration. The results of PFT show significant consistencies compared to the results of other toxicity tests. These data demonstrate that the most suitable time point for assessing lung fibrosis in this model is 14 days post-ITI of BLM based on the observation of fibrosis at 14, 21, and 28 days. Further, the progress of lung injury can be traced by monitoring the PFT parameters of FR, VT, and VM.
Chang-Kyu Heo,Mi-Kyung Woo,Hai-Min Hwang,Ah Ruem Kim,Dae-Yeul Yu,Ju Yeon Lee,Jong Shin Yoo,Chulhun Chang,Jeong Heon Ko,Eun-Wie Cho 한국당과학회 2012 한국당과학회 학술대회 Vol.2012 No.1
Autoantibodies, which are generated by immune system recognizing the presence of the abnormal tumor-associated antigens, are promising biomarkers for the early detection of tumors. Recently, we established a B cell hybridoma pool derived from HBx transgenic mouse, as a source of tumor-associated autoantibodies without using any extracellular antigens, and have characterized the specific target antigens against them. XC154 autoantibody, one of them, has been investigated in this study and its target antigen was identified by mass spectrometric analysis as aminoimidazole carboxamide ribonucleotide transformylase / inosine monophosphate cyclohydrolase (ATIC) that catalyzes the last two steps of de novo purine biosynthesis. A specific mimotope against XC154 autoantibody was screened from the cyclic random hepta-peptide phage library and, using mimotope display M13 phage as a coating antigen for ELISA, we could distinguish patients with hepatocellular carcinoma (HCC) vs. normal subjects with 86.96% sensitivity and 88.24% specificity. These results imply that anti-ATIC autoantibody is induced in patients with HCC and detection of anti-ATIC autoantibody can be used for the diagnosis of HCC. Now, several attempts have been performed to establish a more reliable and convenient assay to detect tumor-assocoated autoantibodies using recombinant proteins displaying cycling peptide instead of mimotope display M13 phage and the usefulness of improved assay will be discussed.
참억새로부터 분리된 S-Adenosylmethionine Synthetase (SAMS) 유전자를 이용한 담배 형질전환체계 확립
Mi Ran Jeon,Eun Soo Seong,Ji Hye Yoo,Jae Hoo Choi,Chang Heum Kim,Byeong Ju Kang,Kweon Heo,Chang Yeon Yu 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.10
Background : Temperature is major factor for growth plant. Recently, because of global warming, abnormal temperature included drought, deluge, sudden temperature change and heavy snow damaged crops in the world. In Korea, crops have been sensitive to low temperature on early growth stage, e.g. fruit tree and ginseng, were damaged owing to sudden heavy snow and cold on Spring. Therefore, recently interest in cold resistance crops were increased in demand rapidly. This study was performed to establish transgenic Nicotiana benthamiana by transforming cold resistant gene related to cold tolerance S-adenosylmethionine synthetase (SAMS) isolated from Miscanthus sinensis. Methods and Results : Total RNA was extracted from leaves of M. sinensis using Trizol assay and isolated MsSAMS. Isolated MsSAMS was insert into SacⅠ- XbaⅠ sites of pMBP1 vector. The vector was transformed to Agrobacterium tumefaciens strain LBA4404 by DH5α. A. tumefaciens with binary plasmid were selected at YEP medium supplemented with kanamycin. Cut leaves of tobacco were co-cultured with selected A. tumefaciens. Co-cultured leaves was grown on regeneration medium for a month at dark condition, and transferred to at light condition. Regeneration shoot from callus were excised and transferred to root-induction medium. Approximately, 58% of leaves explant produced callus. Nearly, 30% of callus had shoot and approximately, 94% of shoots were rooted in root-induction medium. Conclusion : We established an efficient transformation system of N. benthamiana transformed by using MsSAMS gene related to cold tolerance isolated from M. sinensis. We may use the produced transgenic plants to prevent damages carried by cold.
Noninvasive Monitoring of Bleomycin-induced Lung Injury in Rats Using Pulmonary Function Test
Yang, Mi-Jin,Yang, Young-Su,Kim, Yong-Bum,Cho, Kyu-Hyuk,Heo, Jeong-Doo,Lee, Kyu-Hong,Song, Chang-Woo Korean Society of ToxicologyKorea Environmental Mu 2008 Toxicological Research Vol.25 No.2
The single intratracheal instillation (ITI) of bleomycin (BLM) is a widely used method for inducing experimental pulmonary fibrosis in rat model. In the present study, pulmonary function tests (PFTs) of tidal volume ($V_T$), minute volume ($V_M$), and respiratory frequency ($F_R$) have been applied to study their possibility as a tool to monitor the progress of BLM-induced lung injury in rat model. Rats were treated with a single ITI of BLM (2.5 mg/kg) or saline (control). Animals were euthanized at 3, 7, 14, 21, and 28 days post-ITI. Lung toxicity effects were evaluated by inflammatory cell count, lactate dehydrogenase (LDH) activity in the bronchoalveolar lavage fluid (BALF), and light microscopic examination of lung injury. The PFT parameters were measured immediately before the animals were sacrificed. BLM treatment induced significant cellular changes in BALF-increase in number of total cells, neutrophils, and lymphocytes along with sustained increase in number of macrophages compared to the controls at days 3, 7, and 14. BALF LDH level was significantly increased compared to that in the controls up to day 14. On day 3, infiltration of neutrophils was observed in the alveolar spaces. These changes developed into marked peribronchiolar and interstitial infiltration by inflammatory cells, and extensive thickening of the interalveolar septa on day 7. At 14, 21, and 28 days, mild peribronchiolar fibrosis was observed along with inflammatory cell infiltration. The results of PFT show significant consistencies compared to the results of other toxicity tests. These data demonstrate that the most suitable time point for assessing lung fibrosis in this model is 14 days post-ITI of BLM based on the observation of fibrosis at 14, 21, and 28 days. Further, the progress of lung injury can be traced by monitoring the PFT parameters of $F_R$, $V_T$, and $V_M$.
( Seung Mi Kang ),( Ji Yun Min ),( Dong Jin Park ),( Mi Jin Jeong ),( Hyun Jin Song ),( Chang Mi Heo ),( Hak Gon Kim ),( Jae Kyung Yang ),( Cheul Ho Lee ),( Chandrakant S. Karigar ),( Myung Suk Choi ) 한국산림과학회 2010 Forest Science And Technology Vol.6 No.2
This study investigated the ability of potassium chloride (KCl) to elicit the production of bilobalide (BB), ginkgolide A (GA) and ginkgolide B (GB) by Ginkgo biloba cell suspension cultures. The salt stress by KCl treatments increased production of BB, GA and GB in both suspended cells and cultured medium. Especially, treatment of KCl 800 mM of highest concentration was stimulated emission into cultured medium BB, GA and GB compounds accumulated in cells. Although KCl 800 mM severely inhibited cells growth, the maximum content of GA and GB in cells was obtained in the treatment of KCl 800 mM, which was 1.9 and 4.0 times higher than the control. These results thus suggest that salt stress can afford enhanced production of secondary metabolites by plant cell cultures.
Seung-Mi Kang,Ji-Yun Min,Dong-Jin Park,Mi-Jin Jeong,Hyun-Jin Song,Chang-Mi Heo,Hyun-Shik Moon,Jong-Gab Kim,Chandrakant S. Karigar,Myung-Suk Choi 경상대학교 농업생명과학연구원 2011 농업생명과학연구 Vol.45 No.1
An efficient method for the rapid micropropagation of Camptotheca acuminata from axillary buds was established by application of various plant growth regulators. Among various cytokinins, 0.5 mg L-1 BA showed the best performance on shoot multiplication, number average multiple shoots up to 10.8. The propagated shoot cuttings in vitro were elongated on NN basal medium without plant growth regulators. The secondary multiple shoots were induced at the site of initially induced buds. Rooting was induced directly near the base of the shoot on half-strength NN medium containing 0.5 mg L-1 of IBA, whereas high concentration of 1.0 mg L-1 IBA could induce callus at the base of the shoot. The camptothecin content, anticancer compound of the micropropagated plants was contained in various tissues. Camptothecin contents were 1.8 and 2.5 mg g-1 dry weight in stems from propagated in vitro and mother plant, respectively. This result may be used to develop strategies for large-scale propagation of elite C. acuminata trees.