Alkali-dissolving hydrothermal synthesis of zeolite P from fly ash

Micro & nano letters

article

Peng Wang¹  Qi Sun¹  Yujiao Zhang²  Jun Cao¹ 

[1] College of Materials and Metallurgy, Guizhou University;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology

关键词: dissolving;    crystal growth from solution;    thermal stability;    adsorption;    scanning electron microscopy;    zeolites;    fly ash;    desorption;    X-ray diffraction;    differential scanning calorimetry;    Fourier transform infrared spectra;    fluorescence;    solid-state phase transformations;    alkali-dissolving hydrothermal synthesis;    zeolite P;    fly ash;    pseudospherical form;    X-ray diffraction;    X-ray fluorescence;    Fourier-transform infrared spectroscopy;    zeolite materials;    thermogravimetry-differential scanning calorimetry;    adsorption-desorption method;    scanning electron microscopy;    Brunauer–Emmett–Teller analysis;    bound water content;    phase transistion temperature;    thermal stability;    temperature 400.0 degC;    N2;   

DOI  :  10.1049/mnl.2018.5650

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Polycystic ovary syndrome(PCOS) is a heterogeneous disorder of uncertain etiology , it is the most common endocrinopathy in women and most common cause of anovulatery infertility ,characterized by chronic anovulation and hyperandrogenemia .The present study was designed to investigate the effect of silymarin which is known to have antioxidant and insulin sensitivity effects on the  levels of glucose, insulin ,testosterone ,leutinizing hormone(LH) and progesterone .Ovulation rate and Homeostasis Model Assessment of insulin Resistance (HOMA) ratio were determined .A 3-months of treatment were conducted in 60 PCOS patients in three well-matched groups .The first one (n=20),received silymarin(750mg/day)  .The second group received metformin(1500mg/day) while the third group treated by combination of metformin (1500mg/day )and silymarin (750mg/day). All these groups  had taken the drugs in divided doses. The results showed significant improvement in all parameters at the end of treatment .The percentage of increment in progesterone levels after completion of treatment were 12.12, 15.9, and 17.51 in groups 1, 2, and 3 respectively and the number of patients  ovulated after 3 months of treatment  were 4,5, and 10 in groups 1,2, and 3 respectively. However they are more better in group of patients who were treated with combination of silymarin  with metformin.In conclusion the addition of silymarin to metformin in treatment of PCOS patients has improving effect on disturbed hormones and ovulation rate.

【 授权许可】

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