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Enrichment and isolation of phenol from its aqueous solution using foam fractionation
Shenghao Guo,Zhao Liang Wu,Wei Liu,Hongzhen Li,Di Huang,Nan Hu 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.36 No.-
In this work, the feasibility of foam fractionation for the enrichment and isolation of phenol from itsaqueous solution was studied by using cetyltrimethyl ammonium bromide (CTAB) as the collector. Atwo-stage foam fractionation technology was developed for simultaneously obtaining a high enrichmentratio and a high recovery percentage. Under the suitable operating conditions, the enrichment ratio andrecovery percentage of phenol reached as high as 84.46 and 93.43%, respectively. Subsequently, foamfractionation was also used to isolate phenol from CTAB in the first stage foamate, in which theinteraction between phenol and CTAB could be weakened by adjusting pH. The concentration of CTABsignificantly decreased from 11.230 g/L in the feeding solution to 0.620 g/L in the residual solution byusing the foam fractionation, while the concentration of phenol slightly decreased from 2.533 g/L to2.450 g/L. The results indicated that it was practicable to successively enrich and isolate phenol from itsaqueous solution by using foam fractionation.
Yang Wang,Victoria Nisenblat,Liyuan Tao,XinYu Zhang,Hongzhen Li,Caihong Ma 대한부인종양학회 2019 Journal of Gynecologic Oncology Vol.30 No.3
Objective: To evaluate the effectiveness of oral contraceptive pill (OCP) as therapy for endometrial hyperplasia (EH) without atypia in reproductive-aged women compared with oral progestin. Methods: A retrospective cohort study was carried out in our reproductive center. Consecutive patients diagnosed with infertility and non-atypical EH identified through electronic database who met inclusion criteria (n=309). Patients were assigned to two treatment groups: OCP (n=216) and oral progestin (n=93); clinical and reproductive outcomes were recorded. Results: Reversal of EH to normal endometrium, clinical pregnancy, live birth and miscarriage rate. Women in OCP group were younger, had higher prevalence of Polycystic Ovary Syndrome and other uterine pathology and longer duration of infertility than women in progestin group. Reversal of EH was observed in 93.52% women on OCP and in 86.02% women on progestin (p=0.032; adjusted odds ratio [aOR]= 2.35; 95% confidence interval [CI]=1.06-5.21) after the initial course of treatment for 2 to 6 months. Cyclic OCP (n=184) resulted in better response to treatment compared to continuous OCP (n=32) (95.11% vs. 84.38%; p=0.039; aOR =3.60; 95% CI =1.12-11.55). Clinical pregnancy rate in OCP group was marginally higher than progestin group (87/208, 41.83% vs. 27/90, 30.00%; p=0.054). Miscarriage (25.29% vs. 29.63%; p=0.654) and live birth rate (31.25% vs. 21.11%; p=0.074) were comparable between the groups. Conclusion: For the first time we demonstrate that OCP is an effective therapy for nonatypical EH and is associated with higher remission rate compared with oral progestin. Reproductive outcomes are reassuring and comparable between the two groups.