جستجوی مقالات مرتبط با کلیدواژه « fe » در نشریات گروه « پزشکی »

In view of growing environmental issues there is a requirement for the immediate eradication of pesticides and its residues from local and commercial streamlets. Quinalphos is one of the most common organophosphorous pesticide especially used in agricultural fields bring about a great impact in environment thereby affecting the health of aquatic organisms and humans. Among the various type of method that has been implemented, photocatalytic reaction is considered as the most relevant technique for the removal of toxic organic contaminants. In this study, modified TiO2 has been synthesized by doping with Fe, S using a simple one-step sol-gel method. The incorporation of Fe3+ and the distribution of S nonmetal in TiO2 crystal lattice were affirmed by the XRD, SEM and FT-IR analysis. The band gap energy of Fe/S/TiO2 nanocomposite has been narrowed to 2.5eV and its photocatalytic activity was extended to the visible region. Thus Fe/S/TiO2 photocatalyst was employed for the eradication of Quinalphos and the complete mineralization was achieved in 12 min of visible light irradiation and it is analyzed by TOC analysis. Furthermore, the reusable feature of the catalyst was demonstrated to be utilised for twelve cycles. The penetration of pesticide residues on protein pockets of fishes was predicted by molecular docking. Furthermore, the reduction in toxicity level of the effluent was examined by using aquatic organisms. Thus Fe/S/TiO2 nanocomposite is an efficient photocatalyst to oxidize emerging organic contaminants due to its high synergetic effect of visible light absorbing tendency and low recombination effect of charge carriers.

Pharmaceutical pollutants are one of the most important pollutants for water resources, and their health and environmental effects have been well estimated.Absorption is one of the best methods of the removal of antibiotics using nanocomposite.
This experimental study was performed on Nano composites. The PAC/Fe/Si/Zn Nano composite was successfully synthesized using a co-precipitation method in which iron (Fe), silicon (Si) and zinc (Zn) were loaded on the activated carbon powder (PAC). The structural features of the as-synthesized Nano composite were determined using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectroscopy (EDS). The as-synthesized Nano composite was utilized to remove azithromycin and cefixime from aqueous solution with the assistance of UV light. The effect of operational parameters such as pH, irradiation time, initial azithromycin/cefixime concentration and Nano composite dose on UV-assisted removal performance was evaluated using an optimization process.
The UV-assisted removal activities indicated more removal percentage (99.7%) for azithromycin compared to cefixime (95.6%). The kinetics of removal was tested using Langmuir-Hinshelwood model, indicating the first-order reaction kinetics as the best model for UV-assisted removal of both azithromycin and cefixime. Adsorption equilibrium data were modeled using Langmuir and Freundlich isotherms. Azithromycin equilibrium adsorption showed a good fit with both Langmuir and Freundlich models, while the most suitable model for cefixime adsorption was estimated to be Langmuir isotherm. 
The findings showed that PAC/Fe/Si/Zn Nano composite were well able to degrade non-biodegradable antibiotics in aqueous solutions, which is very valuable from environmental aspects.

 Bread has long been one of the most popular foods and is the major source to supply energy, protein, minerals, and vitamins. The type of bread making process may affect its nutritional value. This study aimed to investigate bread baking methods and their effects on protein efficacy ratio (PER) and the status of some iron-related blood parameters in rats.

 Four diets were used in this study, including a control diet (animals chow), fermented bread, non-fermented bread, and soda bread. At first, some chemical parameters of flour and bread were measured, and then PER and some hematological parameters were determined in rats. Descriptive statistics include mean ± standard deviation (SD), and analytical statistics include one-way ANOVA and Tukey post hoc test. P < 0.05 was considered statistically significant.

 The wheat flour’s Fe was 18.68 mg/kg. The PER value was negative in the group that received soda bread, and the weight gain was the lowest in the soda bread group. Ferritin, RBC, Hematocrit, BUN, MCV, and MCHC mean values were significantly lower in the rats that received soda bread than other groups. There were no differences among groups in MCH.

 Although bread can be used as a major source to supply energy protein and other nutritional values, the soda bread making process may decrease protein efficacy ratio and cause debilitation of hematological parameters. These effects of soda can disrupt the body's physiological processes and lead to disease in the long run.

Magnetic nanoparticles have been highly regarded because of their unique properties, such as hyperthermia, medicine control release, and diagnostic applications. The main aim of the current paper is to offer a new system for the modification of Fe3O4 (SPIONs) superparamagnetic nanoparticles physically and chemically with polymers through physical retention. These modified nanoparticles have been used to encapsulate cisplatin as an anticancer medicine and the effect of nanocapsulated cisplatin has been studied in lung cancer (A549) cell line. Using ring-opening polymerization Triblock copolymer PCL-PEG-PCL was prepared of ɛ-caprolactone (PCL) in the presence of polyethylene glycol (PEG). Magnetic iron nanoparticles were also prepared and identified. Using Fourier Transform Infrared Spectroscopy (FTIR), the bulk features of the copolymers were determined. Nanoparticles loaded with Cisplatin have been ready using the copolymer containing iron superparamagnetic nanoparticles via double emulsion solvent evaporation method and evaluated for medicine entrapment efficiency (%), the quantity of medicine, size, and surface morphology. Cytotoxic tests have been considered using the MTT assay method in lung carcinoma (A549)-treated cells. The results of the study demonstrated that nanocapsulated cisplatin had a significant cytotoxic and anticancer effect in vitro of the lung cancer cell line and it can be concluded that this approach has the ability to fail some of the main chemotherapy constraints and can be an appropriate approach for future programs in the treatment of lung cancer.

The purpose of present study was to evaluate fluoride, nitrate, iron, manganese and total hardness in drinking water of wells and reservoirs in Fereidonkenar, Mazandaran, Northern Iran and compare the results with national and international standards. This cross-sectional descriptive study was carried out on data during five years from the spring of 2008 until the autumn of 2013. Studies were performed on 430 samples in the different seasons and years taken from water and wastewater company (WWC). The results showed that the average fluoride, nitrate, iron, manganese, total hardness concentrations obtained were 0.42, 10.2, 0.136, 0.03, 382.28 mg/l, respectively. The analysis showed a negative correlation between nitrate and fluoride, iron and manganese and a positive correlation with the hardness. The mean fluoride concentration was less than the standard. Total hardness value was more than recommend standard. Nitrate was below 50 mg/l, in accordance with national and international standards. The amount of iron and manganese in drinking water were acceptable. So, except for low fluoride and high total hardness, there was no any problem in other investigated parameters.