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Response surface analysis of removal of a textile dye by a Turkish coal powder
Khataee, Alireza,Alidokht, Leila,Hassani, Aydin,Karaca, Semra Techno-Press 2013 Advances in environmental research Vol.2 No.4
In the present study, an experimental design methodology was used to optimize the adsorptive removal of Basic Yellow 13 (BY13) using Turkish coal powder. A central composite design (CCD) consisting of 31 experiments was employed to evaluate the simple and combined effects of the four independent variables, initial dye concentration (mg/L), adsorbent dosage (g/L), temperature ($^{\circ}C$) and contact time (min) on the color removal (CR) efficiency (%) and optimizing the process response. Analysis of variance (ANOVA) showed a high coefficient of determination value ($R^2=0.947$) and satisfactory prediction of the polynomial regression model was derived. Results indicated that the CR efficiency was not significantly affected by temperature in the range of $12-60^{\circ}C$. While all other variables significantly influenced response. The highest CR (95.14%), estimated by multivariate experimental design, was found at the optimal experimental conditions of initial dye concentration 30 mg/L, adsorbent dosage 1.5 g/L, temperature $25^{\circ}C$ and contact time 10 min.
Aydin Hassani,Reza Darvishi Cheshmeh Soltani,Semra Karaca,Alireza Khataee 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
In the present work, adsorption of basic red 46 (BR46) by nano-sized montmorillonite (MMT)/calciumalginate (CA) composite was optimized using central composite design. The maximum dye removal of85.07% was obtained at an initial dye concentration of 30 mg L 1, adsorbent dosage of 2 g L 1, contacttime of 60 min and temperature of 25 8C. The adsorption capacity decreased with decreasing both initialpH and mixing speed. The pseudo-second order kinetic model had the highest correlation coefficient(R2 = 1.00). Based on the Langmuir isotherm model, the maximum adsorption capacity of MMT/CA wasabout 35 mg g 1.
Survival of gynecological cancers in Turkey: where are we at?
Murat Gultekin,Selin Dundar,Irem Kucukyildiz,Mujdegul Zayifoglu Karaca,Guledal Boztas,Semra Hatice Turan,Ezgi Hacikamiloglu,Bekir Keskinkilic 대한부인종양학회 2017 Journal of Gynecologic Oncology Vol.28 No.6
Objective: To investigate the 5-year relative survival rates in gynecological cancers diagnosed and treated in Turkey by year 2009 and to compare the results with developed countries. Methods: Data of patients diagnosed for ovarian, corpus uteri or cervix uteri cancer at year 2009 are collected from 9 national cancer registry centers. Date of deaths are retracted from governmental Identity Information Sharing System (KPS). In order to calculate relative survival rates, national general population mortality tables are obtained from Turkish Statistical Institute (TurkStat). Hakulinen method is used for computing curves by R program. Data for European, Asian and some developed countries were obtained from official web pages. Results: A total of 1,553 patients are evaluated. Among these, 713 (45.9%) are corpus uteri cancers, while remaining 489 (31.5%) are ovarian and 351 (22.6%) are cervix uteri. Five-year overall relative survival rates are 85%, 50%, and 62% for corpus uteri, ovarian, and cervix uteri, respectively. These figures are between 73%–87% for corpus uteri, 31%–62% for ovarian and 61%–80% for cervix uteri in developed countries. Stage is the most important factor for survival in all cancers. Five-year relative survival rates in corpus uteri cancers are 92%, 66%, and 38% for localized, regional, and distant metastatic disease, respectively. These figures are 77%, 57%, and 29% for ovarian; 80%, 50%, and 22% for cervix uteri. Conclusion: This is the first report from Turkey giving national overall relative survival for gynecological cancers from a population based cancer registry system.
Alireza Khataee,Aydin Hassani,Reza Darvishi Cheshmeh Soltani,Murat Kıranşan,Semra Karaca,Canan Karaca 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.1
The removal of two anionic dyes, C.I. Acid Orange 7 (AO7) and C.I. Acid Red 17 (AR17), by ultrasoundassisted adsorption on the modified nanoclay in aqueous solutions was studied. The modified nanoclay was characterized by SEM/EDX, BET, XRD and FT-IR techniques. The average crystal size for the interlayer spacing of the modified nanoclay was about 14.3 nm. Central composite design (CCD) was used for the optimization of the operational parameters, including the initial dye concentration, sonication time, adsorbent dosage and temperature. The results demonstrated a good agreement between the predicted values obtained by the model and the experimental values for both AO7 (R2= 0.959) and AR17 (R2=0.971).
Afsar, Cigdem Usul,Gunaldi, Meral,Kum, Pinar,Sahin, Berksoy,Erkisi, Melek,Kara, Ismail Oguz,Paydas, Semra,Duman, Berna Bozkurt,Ercolak, Vehbi,Karaca, Feryal,Uyeturk, Ummugul,Guner, Sebnem Izmir Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.21
Background: The aim of this study was to investigate the general characteristics of patients with deep vein thrombosis (DVT) and pancreatic cancer as well as evaluate the relationship between mean platelet volume (MPV), DVT and survival. Materials and Methods: Seventy-seven patients with pancreatic cancer, who were admitted to Cukurova University Medical Faculty, Department of Medical Oncology, were enrolled in the study Results: The mean age was $59{\pm}20$. Forty-nine (63.6%) were men and 28 women (36.4%). Sixty-eight (88.3%) patients had adenocarcinoma and 9 (11.7%) had a malignant epithelial tumor. Thirty-six (46.7%) had liver metastasis at diagnosis. Twenty-six (33.8%) patients were alive, 20 (26%) were dead and in 31 (40.2%) the status was unknown. Only 14 (18.1%) patients had DVT. In 42 (54.5%) patients MPV values were normal, in 28 (36.4%) patients they were above normal, and in 7 (9.1%) patients they were below normal. There was no statistically significant difference between gender, tumour localization, chemotherapy and survival rates (p:0.56, p:0.11, p:0.21). There was no significant difference between DVT, gender, localisation, histological subtype, the presence of metastasis, stage and if the patient had been treated with chemotherapy (p:0.5, p:0.6, p:0.2, p:0.32, p:0.1, p:0.84). There was also no significant difference between MPV and DVT (p:0.57) but there was a significant difference between liver metastasis and DVT (p:0.02). Age, stage, the presence of metastasis and DVT were prognostic in pancreatic cancer patients. Conclusions: Cases of pancreatic cancer with liver metastasis should be studied more carefully as thrombosis is more common in these patients.