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嫌氣性細菌 Erwinia carotovora subsp. carotovora에 의한 大麻皮의 精練
金永哲,金基淸,吳讚敎 全南大學校 農漁村開發硏究所 1991 農業科學技術硏究 Vol.26 No.-
後前의 Bacillus subtilis 菌에 의한 大麻皮의 纖維精練 方法을 改善하기 위해 Erwinia carotovora subsp. carotovora(植物 軟腐 病原菌)의 生育 培地別, 培地 pH別, 處理溫度別 및 處理時間別 pectin의 分解率과 現地 工場에서의 實用實驗의 精練程度 및 pectin 分解率에 基礎한 새로운 精練方法을 開發하였다. 1. 大麻皮 精練을 위한 E. carotovora의 利用에 있어서 母液培地로는 Nutrient broth나 0.5% pepton水보다는 最少無機염類培地가 pectin分解率에 있어서 가장 높았고 B. subtilis보다 pectin分解 活性이 훨씬 높았다. 2. Pectin分解率이 가장 높았던 E. carotovora 母液培地(最少無機염類培地)의 pH는 7.0에서 부터 8.0 사이였다. 3. E. carotovora를 利用한 大麻皮 精練 處理溫度는 30~35℃, 處理時間은 24~36時間이 合理的이었다. 4. 生産工場에서 實用試驗의 結果 B. subtilis 보다 E. carotovora가 精練效果에 있어서 越等히 좋았고, 1次 處理完了液을 그대로 2次 處理에 利用할 수 있었으며 보다 精練效率이 좋았다. 5. 以上의 結果에서 E. carotovora를 利用한 大麻皮 精練의 새로운 方法을 提示하면 다음과 같다. 菌母液으로는 最少無機염類培地(pH 7.0~8.0)를 利用하고 精練條件으로는 處理溫度 30℃, 處理時間 24~35時間, 連續 2回 處理하며, 强制합氣는 不必要하나 廢液의 滅菌處理가 必要하다. Fermentation conditions for the hemp refining by an anaerobic bacterium, Erwinia carotovora subsp. carotovora, were investigated. Percentage of the hemp pectin decomposition(% HPD) by the bacteria grown in the minimal broth, was measured as a indicator of fermentation since the % HPD was higher in the minimal broth than in the nutrient broth or 0.5% pepton water. The Optimal pH and temperature for the % HPD were pH 7.0~8.0 and 30~35℃, respectively. Fermentor test a factory demonstrated that E. carotovora is more effective organism than B. subtilis, which has been used up to now, for hemp refining at least in the condition of using minimal broth.
전립선영상 판독과 자료체계 2.1 버전: 개요와 비판적인 의견
Chan Kyo Kim 대한영상의학회 2023 대한영상의학회지 Vol.84 No.1
The technical parameters and imaging interpretation criteria of the Prostate Imaging Reporting and Data System version 2 (PI-RADS v2) using multiparametric MRI (mpMRI) are updated in PI-RADS v2.1. These changes have been an expected improvement for prostate cancer evaluation, although some issues remain unsolved, and new issues have been raised. In this review, a brief overview of PI-RADS v2.1 is and several critical points are discussed as follows: the need for more detailed protocols of mpMRI, lack of validation of the revised transition zone interpretation criteria, the need for clarification for the revised diffusion-weighted imaging and dynamic contrast-enhanced imaging criteria, anterior fibromuscular stroma and central zone assessment, assessment of background signal and tumor aggressiveness, changes in the structured report, the need for the parameters for imaging quality and performance control, and indications for expansion of the system to include other indications.
한국 정상인과 제2형 당뇨병 환자에서 췌도베타세포의 정량
김병기,이광우,이정민,문인성,김용귀,이교영,손호영,차봉연,강무일,윤건호,강성구,고승현,김성래,서선희,김동구,이명덕,강찬석 대한당뇨병학회 2000 Diabetes and Metabolism Journal Vol.24 No.5
Background: There have been several reports about insulin secretory impairment in non-obese type 2 diabetic patients and even in impaired glucose tolerant subjects in Korea. Insulin secretory impairment might be induced by insufficient beta-cell mass, functional defects of beta-cells or both. To clarify the cause of impaired insulin secretion in type 2 non-obese diabetic patients in Korea, betacell masses were quantified in normal and type 2 diabetic subjects. Method: Normal pancreases were procured by 6 heart-beating non-diabetic donors under informed consent from relatives and approval of the university ethical committee. To quantify the beta cell mass and insulin content in various part of the pancreas, first we divided it into 3 parts: head, body and tail, and then each three parts were weighed and subdivided again into 8 segments equally. For diabetic patients, tissue sections were obtained from 15 partial or total pancreatectomized type 2 diabetic patients of any causes. After being fixed, tissues were immunostained using the Streptavidin-biotin-peroxidase method with anti-insulin antibody. Beta cells were counted by point count method. Results: The mean value of total pancreas weight of normal subjects (n=b) was 77.1±14.6 g, that of mean relative volume of beta cells in the pancreas was 2.1±0.9%, ranging from 1.4% to 3.1%(head 2.3±0.6%, body 1.8±0.2%, tail 2.2±0.4%). Mean value of total beta cell mass which was calculated from relative volume of beta-cells and weight of each portions was 1.3±0.3 g, ranging from 1.2 g to 1.9 g (head 0.6±0.3 g, body 0.4±0.2 g, tail 0.4±0.2 g). Mean insulin content per pancreas was 63.6±46.6 ㎍, ranging from 27.8 to 137.2 ㎍/pancreas (head 25.1±19.1 ㎍, body 20.8±15.5 ㎍, tail 17.7±14.9 ㎍). In diabetic patients, relative volume of beta cells in tissues were variable from 0.4% to 2.8% and there was good correlation between beta-cell mass and body mass index of the diabetic patients. However we can't find the correlation among relative volume of beta-cell, (r²=0.55, p$lt;0.05) duration of diabetes and age. Remarkable heterogeneity for loss of beta-cells in the islets of diabetic patients was observed even in the same lobe of pancreas. There were no evidence of lymphocytic infiltration in the islets. Conclusion: Insufficient beta cell mass seems to be a main cause for insulin secretory impairment in non-obese type 2 diabetic patients in Korea.
Kim, Jung-Hyun,Lee, Jeong-Soon,Kim, Young-Chan,Chung, Shin-Kyo,Kwon, Chong-Suk,Kim, Young-Kyoon,Kim, Jong-Sang The Korean Society of Food Science and Nutrition 2003 Preventive Nutrition and Food Science Vol.8 No.4
The potential of seven flavonoid glycosides to induce quinone reductase (QR), an anticarcinogenic marker enzyme, in murine hepatoma cells (hepalc1c7) and its mutant cells (BPRc1) was evaluated. Among test compounds, kaempferol-3-O-glucoside, luteolin-6-c-glucoside, and quercetin-3-O-glucoside (Q-3-G) induced QR in hepalc1c7 cells in a dose-dependent manner. However, in BPRc1 cells lacking arylhydrocarbon receptor nuclear translocator (ARNT), only Q-3-G caused a significant induction of quinone reductase at the concentration range of 0.5 to 8 ug/mL, suggesting that it is a monofunctional inducer. Q-3-G induced not only phase 2 enzymes, including QR and glutathione-S-transferase, but also nitroblue tetrazolium reduction activity in HL-60 cells, a biochemical marker for cell differentiation promoting agents. In conclusion, Q-3-G merits further study to evaluate its cancer chemopreventive potential.
Development of Reverse Electrodialysis Power Generation Technology
Chan-Soo Kim(김찬수),Han-Ki Kim(김한기),Young-Woo Choi(최영우),Mi-Soon Lee(이미순),Kyo-Sik Hwang(황교식),Ji-Hyung Han(한지형),Nam-Jo Jeong(정남조),Kang-Min Cheon(전강민),Su-Cheol Hong(홍수철),Gyeong-Hwa Jeong(정경화) 한국신재생에너지학회 2015 한국신재생에너지학회 학술대회논문집 Vol.2015 No.11
KIM, MIN HWAN,PARK, JI AE,WOO, SANG-KEUN,LEE, KYO CHUL,AN, GWANG IL,KIM, BYOUNG SOO,KIM, KWANG IL,LEE, TAE SUP,KIM, CHAN WHA,KIM, KYEONG MIN,KANG, JOO HYUN,LEE, YONG JIN Spandidos Publications 2015 International journal of oncology Vol.46 No.3
<P>Gastrin-releasing peptide receptor (GRPR) is overexpressed by a variety of human tumors and in particular, identified to be upregulated in prostate cancers. The current study aimed to develop clinically translatable BBN analogue-based radioligands for positron emission tomography (PET) of GRPR-positive tumors. We developed radiolabeled BBN analogues and modified radiolabeled galacto-BBN analogues and then investigated their tumor-targeting efficacy in vivo. The chelator 1,4,7-triazacyclononane, 1-glutaric acid-4,7 acetic acid (NODAGA) was used to radiolabel the peptides with Cu-64. The peptides were evaluated by measuring cell-based receptor-binding affinities. Biodistribution experiments and small animal imaging using PET were performed in nude mice bearing subcutaneous PC3 human prostate cancer xenografts. The conjugates were radiolabeled with yields >99%. The stability assay showed that [Cu-64] NODAGA-BBN and [Cu-64]NODAGA-galacto-BBN remained stable in both human and mouse serum for 1 h at 37 degrees C. PET images of PC3 tumor-bearing nude mice were acquired at 1, 3, 24, 48 and 72 h after injection. [64Cu]NODAGA-galacto-BBN showed retention in tumors for 72 h, low liver uptake, and rapid renal clearance. PET imaging results were also confirmed by biodistrubution 1 and 3 h after injection. [Cu-64]NODAGA-BBN and [Cu-64]NODAGA-galacto-BBN are promising new PET probes for GRPR-positive prostate cancer.</P>
Innovative reverse-electrodialysis power generation system for carbon capture and utilization
Kim, Hanki,Kim, Young-Eun,Jeong, Nam-Jo,Hwang, Kyo-Sik,Han, Ji-Hyung,Nam, Joo-Youn,Jwa, Eunjin,Nam, Sung-Chan,Park, Sung-Youl,Yoon, Yeo-Il,Kim, Chan-Soo Elsevier 2017 Journal of CO2 Utilization Vol.20 No.-
<P><B>Abstract</B></P> <P>Global warming has become a serious threat biosphere and effective measures are required to mitigate its intensification. To this end, carbon capture and sequestration (CCS) is a promising technology, while post-combustion capture (PCC) has been developed from CCS. However, an energy penalty during the regeneration step of the CO<SUB>2</SUB> absorbent has remained a critical problem. In the present study, a lab-scale test was conducted on carbon capture with reverse-electrodialysis (CCRED) to evaluate its potential to overcome the technical and economic drawbacks of CCS and RED. The results show that a normalized peak power density of 1W/m<SUP>2</SUP>, equal to 328.6kJ/kgCO<SUB>2</SUB>, could be obtained. The peak power density was 2000-fold higher than that in previous studies. By utilizing CO<SUB>2</SUB> as an energy source in CCRED, this novel process can compensate for the energy penalty in conventional CCS.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Lab-scale carbon capture with reverse-electrodialysis (CCRED) test was conducted to overcome the drawbacks of CCS and RED. </LI> <LI> Normalized peak power density of 1W/m<SUP>2</SUP>, equal to 328.6kJ/kgCO<SUB>2</SUB>, could be obtained from lab-scale CCRED unit. </LI> <LI> The peak power density was 2000-folded higher than in previous studies. </LI> </UL> </P>