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Cheng Chen,Min Li,Chunxia Wang,Shaohai Fu,Wenjun Yan,Chuansheng Chen 한국섬유공학회 2018 Fibers and polymers Vol.19 No.6
The wool fabrics were treated by ultraviolet (UV) radiation and then dyed with Camellia sinensis (L.) O. Ktze var. waldensae (S.Y.Hu) Chang (yellow-bud tea) extract using meta-mordant dyeing method. The results indicated that the hydrophilicity of wool fabrics was improved after UV radiation treatment, which was conducive in improving color performance for the meta-mordant dyeing with yellow-bud tea extract of wool fabrics. The optimal dyeing process was that the powdered extract (5.0 % o.w.f) and the CuSO4 (2.0 % o.w.f) were added to the dyeing liquor, the pH value was adjusted to 3.5-4.0 by HCOOH, the wool fabrics treated by UV radiation for 10 min and then were dyed at a bath ratio of 1:50 under 95 oC for 70 min. By means of three-factor quadratic current rotation revolving design (TQCRRD) method, the computation results of the mathematical equations and models indicated that UV radiation was the most important factor for meta-CuSO4 dyeing with yellow-bud tea extract for wool fabrics.
Performance of fluidized bed electrode in a molten carbonate fuel cell anode
Jubing Zhang,Zhaoping Zhong,Jianmin Xiao,Zongming Fu,Jinxiao Zhao,Weiling Li,Min Yang 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.8
A fluidized bed electrode could lower concentration polarization and activation polarization because of its high mass and heat transfer coefficient. The polarization characteristics of the fluidized bed electrode are systematically investigated in a molten carbonate fuel cell anode with an O_2/CO_2/gold reference electrode. The results show that polarization performance of the anode is improved by selecting proper flow rates of H_2, O_2 and CO_2, choosing suitable nickel particle content together with appropriate O_2/CO_2 ratio, and increasing reaction temperature as well as the area of the current collector. Limiting current density of 115.56 mA·cm^(−2) is achieved under optimum performance as follows:a cylindrically curved nickel plate current collector, nickel particle content of 7.89%, the reaction temperature of 923 K,H_2 flow rate of 275 mL·min^(−1), O_2/CO_2 flow rate of 10/20 mL·min−1 and O_2/CO_2 ratio of 1 : 2.
Dipeptide-Based Solution for Peritoneal Dialysis : Investigations with a Rat Model
Park, Min Sun,Lee, Jse Won,Joo, Jae Hak,Ryu, Chang Beom,Waniewski, Jacek,Werynski, Andzrei,Fu¨rst, Peter,Bergstro¨m, Jonas,Lindholm, Bengt,Lee, Hi Bahl 대한신장학회 1995 Kidney Research and Clinical Practice Vol.14 No.2
Objectives: To investigate the potential effect of dipeptides as osmotic agents, the peritoneal fluid and solute transport characterisitcs were evaluated during peritoneal dialysis using dipeptide-based dialysis solution in rat Methods: A 4 hour single peritoneal dialysis was performed in 12 normal Sprague- Dawley rats. The dipeptide solution(DPS) contained two different di-peptides (AB and AC) containing 3 different amino acids(A, B and C). The total molar concentration of the solution was 169 mmol/l(n=6). The electrolyte concentrations were sodium 132, calcium 1.75, magnesium 0.75, chloride 102, all in mmol/I. Bicarbonate 35 mmol/l was used as a buffer in DPS. The pH of DPS was 7.4. The glucose-based dialysis solution(GBS, Dianeal 3.86% solution containing 3.86 g/1 of anhydrous glucose) was used to provide control values(n=6). Sodium hydroxide 5 mmol/l was added into GBS to achieve the pH value of 7A and therefore the initial dialysate sodium concentration was 136mmol/1. The calculated osrnolality was 439 mmol/kg in DPS and 486 mmol/kg in GBS. Infusion volume was 30 ml. Intraperitoneal dialysate volume was estimated from the dilution of volume marker, I human serum albumin(RISA), with corrections for the elimination of RISA from the peritoneal cavity(Kz, ml/min) and sample volume. The diffusive transport coefficient(Kf3p) and the sieving coefficient(S) were estimated using modified Babb-Randerson-Farrell model. Results: The intraperitoneal volume over time curve and the maximum intraperitoneal volume(V_Dmax) were lower with DPS than with GBS. The peritoneal fluid reabsorption rate estimated by the volume marker elimination rate Kz, was significantly lower with DPS than with GBS. The intraperitoneal net volume change between 180 min and 240 min (Qv$gt;w .w) was significantly lower with DPS than with GBS. During dialysis with DPS the intraperitoneal concentrations of dipepitdes(AB and AC) decreased and the three amino acids, A, B and C, derived from the two dipeptides rapidly in the peritoneal cavity. At the end of a 4hr dialysis, the plasma concentrations of the three amino acids, A, B and C, increased rapidly and reached the concentrations of 51.8, 5.6 and 1.5 times higher thand their baseline values, respectively, while dipeptides were not traced in plasma. Kpp for urea and glucose with DPS were significantly lower than those values with GBS. Conclusion: It is concluded that dipeptides can be good alternative osmotic agents that provides prolonged ultrafiltration and nutrient amino acids from dialysate. However, the use of two dipeptides containing one common amino acid sholuld be avoided to prevent unphysilologically high concentration of certain arnino acid in plama, The future study on the altered peritoneal transport charateristics for urea and glucose with DPS is needed.
SURFACTANT-ASSISTED VAPOR DIFFUSION SYNTHESIS OF CoFe 2 O 4 HOLLOW SPHERES
MIN FU,YUN ZHAO,QINGZE JIAO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.4
Uniform CoFe 2 O 4 hollow spheres with diameter of about 300 nm and a shell thickness of ap-proximately 60 nm were synthesized by a easy vapor di®usion method in the presence of polyvinylpyrrolidone (PVP), in combination with calcination at 550?C. The structure and morphology ofas-prepared samples were characterized by electron microscopy and X-ray di®ractometry (XRD). The hollow spheres exhibited a high saturation magnetization value of 66.4 emu/g and coercivityof 417 Oe at room temperature. A possible formation mechanism for the CoFe 2 O 4 hollow sphereswas proposed.
Purification and Characterization of Mitochondrial Mg2+-Independent Sphingomyelinase from Rat Brain
Jong Min Choi,Yongwei Piao,Kyong Hoon Ahn,Seok Kyun Kim,Jong Hoon Won,Jae Hong Lee,Ji Min Jang,In Chul Shin,Zhicheng Fu,Sung Yun Jung,정의만,김대경 한국분자세포생물학회 2023 Molecules and cells Vol.46 No.9
Sphingomyelinase (SMase) catalyzes ceramide production from sphingomyelin. Ceramides are critical in cellular responses such as apoptosis. They enhance mitochondrial outer membrane permeabilization (MOMP) through self-assembly in the mitochondrial outer membrane to form channels that release cytochrome c from intermembrane space (IMS) into the cytosol, triggering caspase-9 activation. However, the SMase involved in MOMP is yet to be identified. Here, we identified a mitochondrial Mg2+-independent SMase (mt-iSMase) from rat brain, which was purified 6,130-fold using a Percoll gradient, pulled down with biotinylated sphingomyelin, and subjected to Mono Q anion exchange. A single peak of mt-iSMase activity was eluted at a molecular mass of approximately 65 kDa using Superose 6 gel filtration. The purified enzyme showed optimal activity at pH of 6.5 and was inhibited by dithiothreitol and Mg2+, Mn2+, N2+, Cu2+, Zn2+, Fe2+, and Fe3+ ions. It was also inhibited by GW4869, which is a non-competitive inhibitor of Mg2+-dependent neutral SMase 2 (encoded by SMPD3), that protects against cytochrome c release-mediated cell death. Subfractionation experiments showed that mt-iSMase localizes in the IMS of the mitochondria, implying that mt-iSMase may play a critical role in generating ceramides for MOMP, cytochrome c release, and apoptosis. These data suggest that the purified enzyme in this study is a novel SMase.
Hung-Chun Fu,Jen-Ruei Chen,Min-Yu Chen,Keng-Fu Hsu,Wen-Fang Cheng,An Jen Chiang,Yu-Min Ke,Yu-Chieh Chen,Yin-Yi Chang,Chia-Yen Huang,Chieh-Yi Kang,Yuan-Yee Kan,Sheng-Mou Hsiao,Ming-Shyen Yen 대한부인종양학회 2018 Journal of Gynecologic Oncology Vol.29 No.5
Objective: Choice of hysterectomy and adjuvant treatment for International Federation of Gynecology and Obstetrics (FIGO) 2009 stage II endometrioid endometrial cancer (EEC) is still controversial. Aims of this study were to evaluate survival benefits and adverse effects of different hysterectomies with or without adjuvant radiotherapy (RT), and to identify prognostic factors. Methods: The patients at 14 member hospitals of the Taiwanese Gynecologic Oncology Group from 1992 to 2013 were retrospectively investigated. Patients were divided into simple hysterectomy (SH) alone, SH with RT, radical hysterectomy (RH) alone, and RH with RT groups. Endpoints were recurrence-free survival (RFS), overall survival (OS), disease-specific survival (DSS), adverse effects and prognostic factors for survival. Results: Total of 246 patients were enrolled. The 5-year RFS, OS, DSS and recurrence rates for the entire cohort were 89.5%, 94.3%, 96.2% and 10.2%, respectively. Patients receiving RH had more adverse effects including blood loss (p<0.001), recurrent urinary tract infections (p=0.013), and leg lymphedema (p=0.038). Age over 50-year (HR=9.2; 95% confidence interval [CI], 1.2–70.9) and grade 3 histology (HR=7.28; 95% CI, 1.45–36.6) were independent predictors of OS. Grade 3 histology was an independent predictor of RFS (HR=5.13; 95% CI, 1.38–19.1) and DSS (HR=5.97; 95% CI, 1.06–58.7). Patients receiving adjuvant RT had lower locoregional recurrence (p=0.046), but no impact on survival. Conclusion: Different treatment modalities yield similar survival outcomes. Patients receiving SH with RT had lower locoregional recurrent with acceptable morbidity. Age and tumor grading remained significant predictors for survival among patients with FIGO 2009 stage II EEC.