Background & Aims of the Study: Methylene blue (MB) is a risk for human and environment. Adsorption process is one of the removal mechanisms of MB. The purpose of this research was the evaluation of low cost adsorbent of walnut bark granule for MB dye removal from aqueous environments. Materials & Methods: In this experimental research, the effect of various operating parameters...

Pesticides are chemical substances used to control pests in an effort to increase crop production and quality, and food storage. The levels of pesticides in different environmental compartments, such as water, soil, agricultural foods, and products of animal origin, have become a relevant issue. In this study, the levels of pesticide residues in Sabarmati River of Gujarat, India, have been inve...

Mục tiêu: Đánh giá phương pháp định lượng đồng trong huyết tương bằng kỹ thuật quang phổ hấp thụ nguyên tử sử dụng lò điện trên máy AA-7000 của Shimadzu. Đối tượng và nghiên cứu: Giới hạn trắng, giới phát hiện, lượng, khoảng tuyến tính, độ chụm chính xác được đánh giá. Kết quả: Giới hạn trắng, giới phát hiện, định lượng của pháp lần lượt là 0,44 µmol/L, 1,06 µmol/L và 2 µmol/L. Khoảng tính là -...

The concentrations of heavy metals were determined from wastewater samples collected the Gusii treatment plant, May to July, 2021. Heavy metal analysis was done using a flame atomic absorption spectrophotometer, model AA 7000 Shimadzu, Japan. results showed that Zinc and Cadmium below detection limit for all sampling sites. Lead Copper (Mean ± SE) ranged between 0.34 0.06 mg/L 0.86 0.08 0.25 0....

Статья посвящена химической модификации природного полимера хитозана с целью повышения его качества и пригодности для дальнейшего синтеза наночастиц пленок. Были синтезированы образцы хитозана, очищенные гидроксидом натрия последующим переосаждением, обладающие повышенной степенью деацетилирования сниженной молекулярной массой. Также обработкой янтарной кислотой, цистеином, соляной кислотой пол...

Aromatic hydrocarbons present in Iraqi national surface water were believed to be raised principally from combustion of various petroleum products, industrial processes and transport output their precipitation on water.Polycyclic aromatic (PAHs) included the priority pollutant list due toxic carcinogenic nature. The concern about contamination consequent human exposure have encouraged developme...

A sensitive, simple, and specific liquid chromatographic method coupled with electrospray ionization-mass spectrometry (MS) is presented for the determination of sertraline in plasma. With zaleplon as the internal standard, sertraline is extracted from the alkalized plasma with cyclohexane. The organic layer is evaporated and the residue is redissolved in the mobile phase of methanol-10 mmol/L ...

Benzene is an important carcinogenic substance used in many industrial processes. Inhalation of this substance can cause both acute and chronic toxicity. In this study, monitoring of benzene exposure by high-performance liquid chromatography for urine trans,trans-muconic acid (ttMA) determination in 94 subjects, (49 control subjects and 45 mechanics) was performed. The mean urine ttMA level in ...

Experimental Section: Materials. Alpha-cyclodextrin (α-CD) was purchased from Sigma Chemical Company. Trisodium citrate (C6H5Na3O7·2H2O) and hydrogen tetrachloroaurate(III) (HAuCl4·4H2O) were purchased from China National Pharmaceutical Group Corporation (Shanghai, China). All the chemicals were of analytical grade and were used without further purification. Sartorius ultrapure water (18.2 MΩ·c...

The plant Tagetes lucida Cav. (syn. T. florida Sweet, T. schiedeana Less.) is an aromatic herb distributed naturally from Mexico to Honduras, at elevations between 1 000 and 2 000 m. It is used as a spice, for medicine, as insecticide and as ornamental plant. It is cultivated commercially in Costa Rica as a spice herb; it contains an oil having an anise-like odor, and the fresh aerial parts of ...