http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조세현,정운화,천충우,윤영필 대한슬관절학회 2002 대한슬관절학회지 Vol.14 No.2
슬개골-대퇴골 관절의 합병증은 슬관절 전치환술 후 가장 흔한 합병증 중의 하나로, 이런 합병증을 예방하기 위해 슬관절 전치환술 시 슬개골을 치환할 것인가, 아니면 보존할 것인가에 대하여 아직도 많은 논란이 되고 있다. 1993년 8월부터 200년 8월까지 퇴행성 관절염 및 류마티스 관절염으로 슬개골 치환을 하지 않고 인공슬관절 전치환술을 시행한 환자 중 2년이상 추시가 가능했던 36명, 43례를 연구대상으로 하였다. 전례에서 슬개골의 퇴행성 변화에 관계없이 슬개골 보존술(즉 슬개골을 치환하지 않고 슬개골 성형술만 실시함)을 시행하였으며, 추시 기간은 최단 2년에서 최장 10년으로 평균 54개월이었다. 수술전 슬개골의 방사선 사진으로 정상 슬개골을 A군 (10례), 중등도의 퇴행성 변화를 B군 (20례), 심한 퇴행성 변화를 C군 (13례)으로 분리하여 세군의 슬관절 전방부 동통, 운동범위, 계단 오르기 능력 등의 임상적 소견과 슬개골 경사(patellatilt) 및 외측 슬개골 전위(lateral patella shift)의 두 가지 방사선사학적 소견을 비교 분석하였다. 35명중 퇴행성 관절염이 29명, 류마티스 관절염이 6명였으며, 임상적 분석은 American Knee Society Score(KSS)를 사용하였다. 최종추시시 평균 Knee Society Score (KSS)는 A군 93.1점, B군 92.7점, C군 94.2점이었다. 총 43례중 슬관절 전방부 동통을 호소한 예는 A군 2례, C군 2례로 4례 (9.3%)뿐이었으며, 이들은 보행 시는 동통이 없으나, 쪼그린 자세나 계단을 오르내릴 때 동통을 호소하였다. 세군간의 슬관절 운동범위, 계단 오르기 능력 등의 비교에서는 유의한 차이가 없었으며, 방사선학적 비교에서 외측 슬개골 전위는 유의한 차이가 없었고, 슬개골 경사는 A군과 B군에서는 유의한 차이가 없었으나, C군에서는 유의하게 차이가 있었으므로 술전 슬개골의 퇴행성 변화가 심할수록 슬개골 경사가 증가됨을 알 수 있었다(p=0.01). Patello-femoral problem is one of the common complications in total knee arthroplasty and whether to replace the patella or retain it has long been controversial in order to prevent the complications. 43 cases (35 patients) of total knee arthroplasty with patellar retention performed by single surgeon between August 1993 and August 2000 were reviewed retrospectively. The follow-up period averaged 54 months (range, 24-120months). The whole cases were divided into three groups according to the preoperative radiographs. Group A was normal patella (10 knees), Group B was borderline arthritic patella (20 knees), and Group C was severely deformed patella (13 knees). All of 43 knees, regardless of preoperative radiological degree of arthritis received patelloplasty including removal of osteophytes, subchondral shaving and lateral retinacular release was performed in 20 knees (47%). Each groups was evaluated in terms of the objective criteria of anterior knee pain, range of motion, stair climbing ability, and roentgenographic findings. All 35 patents were diagnosed as osteoarthritis in 29 and rheumatoid arthritis in 6. American Knee Society Score (KSS) was assessed for the clinical analysis and lateral patella shift and patella tilt were assessed for roentgenographic analysis. The mean Knee Society Score at final follow-up was 94 in group A, 93 in group B, and 94 in group C. Mild anterior knee pain was reported in 9.3% (Group A: 2 cases, Group C: 2 cases). patellar tilt was significantly higher in C group (oneway ANOVA test, p=0.01), representing that advanced patello-femoral arthritis caused increased patellar tilt. There was nither significant difference in terms of range of motion, and stair climbing ability nor of patellar shift among all three groups. TKA with patelloplasty, not resurfacing the patella, provided satisfactory results without significant problems regardless of the preoperative degree of patello-femoral arthritis.
Yun She,Chunwei Zhang,Mohammad Azis Mahardika,Anindityo Patmonoaji,Yingxue Hu,Shintaro Matsushita,Tetsuya Suekane 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-
This study presented a pore-scale investigation on the dynamic displacement of oil subjected to ex-situand in-situ surfactantflooding using X-ray microtomography. The ex-situ surfactant solution was preprepared,whereas the in-situ surfactant was generated directly with the chemical reaction inside porousmedia. The results showed that oil removal from the pore spaces relied on the combination of piston-like,pore-bodyfilling and a weak emulsification mechanism in the ex-situ system, whereas the in-situ systemwas dominated by a strong emulsification process. The threshold capillary pressure was decreasedsignificantly owing to interfacial tension reduction and wettability alteration, which enhanced the oilcluster mobilization. Therefore, the in-situ system produced the highest oil recovery efficiency of 86.9%compared with ex-situ system and waterflooding. The emulsifying ability was evaluated through oilcluster size distributions and their dynamic evolution. The networks or branches disappeared andemulsified into small oil ganglia and singlets, thereby leading to a significant decrease in the averageequivalent diameter. Finally, strong emulsification in the in-situ system was attributed to quick andprecise surfactant aggregation at the oil–water interface that induced blebbing, whereas the ex-situ casewas dominated by slow surfactant transport relying on advection and diffusion in theflow mainstream.
She-Min Zhu,Da-Hai Zheng,Yuesong Shen,Yun-Shun Qiu,Bing Li,Yan-Wei Zeng,Shubao Shen,Shemin Zhu 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.24 No.-
Effects of catalyst loading amount, reaction temperature, O2 concentration, NH3/NO molar ratio and SO2 on low-temperature catalytic performance of the Mn–La–Ce–Ni–Ox (Mn/La/Ce/Ni = 2.5:2.5:1:1 in mol)/ PPS for NH3-SCR of NO were mainly studied. Results showed that the filter with catalyst loading amount of 250 g/m2 obtained more than 95% NO removal efficiency at 200 8C under filtration velocity of 1 m/min. The NO removal efficiency was still above 85% by injecting 300 ppm SO2 at 200 8C. Anyway, the Mn–La– Ce–Ni–Ox/PPS catalytic filter is promising to achieve the expectation of simultaneous removing particulate and NOx from low-sulfur flue gas in cement kiln.
Gamma Irradiation-reduced IFN-γ Expression, STAT1 Signals, and Cell-mediated Immunity
( Seon Kyu Han ),( Jie Young Song ),( Yeon Sook Yun ),( She Yoon Yi ) 생화학분자생물학회 2002 BMB Reports Vol.35 No.6
The signal transducer and activator of transcription (STAT)1 is a cytoplasmic-transcription factor that is phosphorylated by Janus kinases (Jak) in response to interferon γ (IFN-γ). The phosphorylated STAT1 translocates to the nucleus, where it turns on specific sets of IFN-γ-inducible genes, such as the interferon regulatory factor (IRF)-1. We show here that gamma irradiation reduces the IFN-γ mRNA expression. The inhibition of the STAT1 phosphorylatlon and the IRF-1 expression by gamma irradiation was also observed. In contrast, the mRNA levels of IL-5 and transcription factor GATA-3 were slightly induced by gamma irradiation when compared to the non-irradiated sample. Furthermore, we detected the inhibition of cell-mediated immunity by gamma irradiation in the allogenic-mixed lymphocytes` reaction (MLR). These results postulate that gamma irradiation induces the polarized-Th2 response and interferes with STAT1 signals, thereby causing the immunosuppression of the Th1 response.
Li, Jing,Liu, Juntao,Wang, Guoqiang,Cha, Joon-Yung,Li, Guannan,Chen, She,Li, Zhen,Guo, Jinghua,Zhang, Caiguo,Yang, Yongqing,Kim, Woe-Yeon,Yun, Dae-Jin,Schumaker, Karen S.,Chen, Zhongzhou,Guo, Yan American Society of Plant Biologists 2015 The Plant cell Vol.27 No.3
<P>Arabidopsis protein NCA1 interacts with catalases in the cytosol and increases catalase activity through maintaining catalase folding state, which is required for stress responses.</P><P>Catalases are key regulators of reactive oxygen species homeostasis in plant cells. However, the regulation of catalase activity is not well understood. In this study, we isolated an <I>Arabidopsis thaliana</I> mutant, <I>no catalase activity1-3</I> (<I>nca1-3</I>) that is hypersensitive to many abiotic stress treatments. The mutated gene was identified by map-based cloning as NCA1, which encodes a protein containing an N-terminal RING-finger domain and a C-terminal tetratricopeptide repeat-like helical domain. NCA1 interacts with and increases catalase activity maximally in a 240-kD complex in planta. In vitro, NCA1 interacts with CATALASE2 (CAT2) in a 1:1 molar ratio, and the NCA1 C terminus is essential for this interaction. CAT2 activity increased 10-fold in the presence of NCA1, and zinc ion binding of the NCA1 N terminus is required for this increase. NCA1 has chaperone protein activity that may maintain the folding of catalase in a functional state. NCA1 is a cytosol-located protein. Expression of <I>NCA1</I> in the mitochondrion of the <I>nca1-3</I> mutant does not rescue the abiotic stress phenotypes of the mutant, while expression in the cytosol or peroxisome does. Our results suggest that NCA1 is essential for catalase activity.</P>