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        Response surface methodology approach to optimize coagulation-flocculation process using composite coagulants

        Huaili Zheng,Tiroyaone Tshukudu,Xuebin Hua,Jun Yang,Mingzhuo Tan,Jiangya Ma,Yongjun Sun,Guocheng Zhu 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.3

        Response surface method and experimental design were applied as alternatives to the conventional methods for optimization of the coagulation test. A central composite design was used to build models for predicting and optimizing the coagulation process. The model equations were derived using the least square method of the Minitab 16 software. In these equations, the removal efficiency of turbidity and COD were expressed as second-order functions of the coagulant dosage and coagulation pH. By applying RSM, the optimum condition using PFPD1 was coagulant dosage of 384 mg/L and coagulation pH of 7.75. The optimum condition using PFPD2 was coagulant dosage of 390 mg/L and coagulation pH of 7.48. Confirmation experiment demonstrated a good agreement between experimental values and model predicted. This demonstrates that RSM and CCD can be successfully applied for modeling and optimizing the coagulation process using PFPD1 and PFPD2.

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        Magnetic, dielectric and optical properties of five-layered Aurivillius phase Bi6Fe2Ti3O18-based ceramics

        Xuzhong Zuo,Enjie He,Jin Bai,Shunjin Zhu,Xucai Kan,Zhenzhen Hui,Jie Yang,Xuebin Zhu,Jianming Dai 한국물리학회 2019 Current Applied Physics Vol.19 No.12

        The structural, magnetic, dielectric and optical properties of Aurivillius Bi6Fe2Ti3O18-based ceramics were investigated in detail. The replacement of Co for Fe/Ti ions obviously varies the grain morphology. Compared with Bi6Fe2Ti3O18 (BFTO) with antiferromagnetic ordering, a spin glass state can be observed in Bi5.25La0.75Fe2Ti3O18 ceramic, while other samples exhibit the ferromagnetic behavior. The specimen Bi6Fe2Ti2(NbCo)0.5O18 (BFTNCO) represents the largest remanent magnetization Mr of 0.93emu/g among all the samples, which can be attributed to the combination of a short lattice parameter c and a large lattice distortion as well as more magnetic ions in a unit cell. The room-temperature dc conductivity of BFTNCO is one order magnitude lower than that of BFTO. In addition, the band gaps of Co-doped samples are about 0.2eV smaller than these of Co-free samples. This work provides a promising path forward to tailor the multiferroic and optical properties in five-layered Aurivillius compounds.

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        A Single-Arm Phase II Study of Nab-Paclitaxel Plus Gemcitabine and Cisplatin for Locally Advanced or Metastatic Biliary Tract Cancer

        Ting Liu,Qing Li,Zhen Lin,Chunhua Liu,Wei Pu,Shasha Zeng,Jun Lai,Xuebin Cai,Lisha Zhang,Shuyang Wang,Miao Chen,Wei Cao,Hongfeng Gou,Qing Zhu 대한암학회 2024 Cancer Research and Treatment Vol.56 No.2

        Purpose Patients with advanced biliary tract cancer (BTC) have a poor survival. We aim to evaluate the efficacy and safety of nab-paclitaxel plus gemcitabine and cisplatin regimen in Chinese advanced BTC patients.Materials and Methods Eligible patients with locally advanced or metastatic BTC administrated intravenous 100 mg/m<sup>2</sup> nab-paclitaxel, 800 mg/m<sup>2</sup> gemcitabine, and 25 mg/m<sup>2</sup> cisplatin every 3 weeks. The primary endpoint was progression-free survival (PFS). The secondary endpoints included overall survival (OS) and adverse events, while exploratory endpoint was the association of biomarkers with efficacy.Results After the median follow-up of 25.0 months, the median PFS and OS of 34 enrolled patients were 7.1 months (95% confidence interval [CI], 5.4 to 13.7) and 16.4 months (95% CI, 10.9 to 23.6), respectively. The most common treatment-related adverse events at ≥ 3 grade were neutropenia (26.5%) and leukopenia (26.5%). Survival analyses demonstrated that carcinoembryonic antigen (CEA) levels could monitor patients’ survival outcomes. A significant increase in the number of infiltrating CD4+ cells (p=0.008) and a decrease in programmed death-1–positive (PD-1+) cells (p=0.032) were observed in the response patients.Conclusion In advanced BTC patients, nab-paclitaxel plus gemcitabine and cisplatin regimen showed therapeutic potential. Potential prognostic factors of CEA levels, number of CD4+ cells and PD-1+ cells may help us maximize the efficacy benefit.

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