in this scientific research, mno2 nanoparticles (nps) have been successfully prepared by a precipitation method using kmno4, mnso4.h2o and h2o2 (30%) as the precursors. as-prepared sample was identified by x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem) and infrared (ir) techniques. the transmission electron microscopy (tem) showed 7-8 nm rang...

curcumin is a natural polyphenolic compound with anti-cancer, anti-inflammatory, and anti-oxidation properties. low water solubility and rapid hydrolytic degradation are two challenges limiting use of curcumin as therapeutic agent. in the current study, the role of the native/modified forms of bovine serum albumin (bsa) and casein, as food-grade biopolymers and safe drug delivery systems, on th...

in this work at the first step calcium hydroxide nano-particles were synthesized via sono-chemical method at room temperature. at the second step aminated multi-walled carbon nano-tubes was prepared via chemical modification of surfaces of cnt. finally modified-mwcnt and ca(oh)2 were added to paraloid matrix by aid of ultrasonic irradiation. paraloid-modified-mwcnt-ca(oh)2 nanocomposite was use...

Cadmium sulfide nanoparticles were grown using wet chemical method by dissolving the reactants of cadmium acetate and sodium sulfide in the presence of thioglycerol (TG) as capping agent in ethanol solvent. Different nanoparticle sizes and size distribution were obtained through varying the molarities of thioglycerol. At higher TG concentration, synthesis provides a nearly monodisperse nanopart...

sulphur mustard (sm) is an alkylating agent that was first used as a chemical warfare agent during the first world war in 1917. sm is readily absorbed from the skin, respiratory and gastrointestinal tract and is distributed to several organs. sm may act rapidly and persistently upon dna replicating mechanism of the individual cells during mitosis particularly in the hematopoietic system. of 233...

Effects of chemical structure changes on the thermal, mechanical, and crystalline properties of rigid rod epoxy resins have been studied for azomethine epoxy, biphenol epoxy, and tetramethyl biphenol epoxy. Rigid rod epoxies have exhibited better properties than those of the flexible bisphenol A epoxy. The chemical structures of both rigid rod epoxy and curing agent control the properties of cu...

Silver is composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms. Silver nanoparticles have been a potent antibacterial, antifungal, anti-viral and anti-inflammatory agent. A simple, eco-friendly, inexpensive biosynthetic method was employed to synthesize silver nanoparticles.  The present study aimed at the comparative study of silver nanopartic...

Silver is composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms. Silver nanoparticles have been a potent antibacterial, antifungal, anti-viral and anti-inflammatory agent. A simple, eco-friendly, inexpensive biosynthetic method was employed to synthesize silver nanoparticles.  The present study aimed at the comparative study of silver nanopartic...

Chemical leukoderma occurs due to the toxic effect of a variety of chemical agents. Mechanisms include either destruction or inhibition of melanocytes. We report two male patients (36 and 51 years old) who presented with multiple hypopigmented macules and patches on the neck, wrist, and legs after exposure to dimethyl sulfate in a chemical industry. Physical examination revealed irregular depig...