in this study, we explained a nanobiosensor for dna sequence detection, featuring sequence specificity, cost efficiency, speed, and ease of use. without the need for labels or indicators, it may be ideal for the detection of biological agents. this review describes recent advances in electrochemical impedance spectroscopy (eis) with an emphasis on using nanoparticles and nanotechnology. a power...

a new and simple method followed by atomic absorption spectrometry has been developedfor indirect determination of ascorbic acid (aa). the proposed method was based on the oxidationof aa to dehydroascorbic acid with cu2+cation(200mgl-1)in an ammonium thiocyanatesolution atph2.4. aa reduces cu2+to cu+followed by the precipitation of cu+ with scn-. then, the excess ofcu2+in the solution was measu...

resonances are intrinsic characteristics of an elastic object, which are completely independent of thesource of excitation. the appropriate utilization of the information contained within the resonancespectra and the identification of the resonance frequencies of the object can be used as a potent toolfor material characterization. in this paper, a new mathematical model for the wave diffractio...

europium (eu) doped zno microsphere based nano-sheets were synthesized through hydrothermal method. effects of different concentrations of europium on structural and optical properties of zno nano-sheets were investigated in detail. prepared un-doped and eu-doped zno samples were characterized using x-ray diffraction (xrd), energy dispersive x-ray spectroscopy (edx), scanning electron microscop...

electron paramagnetic resonance (epr) spectroscopy, also known as electron spin resonance(esr) especially among physicists, is a strong and versatile spectroscopic method forinvestigation of paramagnetic systems, i.e. systems like free radicals and most transition metalions, which have unpaired electrons. the sensitivity and selectivity of epr are notable andintriguing as compared to other spec...

in this research, tellurium (te) film with thicknesses of 100-250 nm were deposited on ceramic substrates by thermal evaporation at 373 k. the thickness of the film was determined by rutherford backscattering spectroscopy. the influence of the thickness on the structural, morphological and molecular bonds was characterized using xrd, scanning electron microscope, and raman spectroscopy. the xrd...

background: a few elements of soil are radioactive. soil can transfer radionuclide into plants feeding human. sometimes their   levels are as high as to be concern of human healthy. rice has an important share for iranian foods especially in north of iran. therefore we decided to obtain radionuclides concentration emitting g rays in lahijan city (northern iran) rice fields using g spectroscopy....

A general theoretical description of dual-beam photothermallensing spectroscopy is given. The results are valid for most general conditions, that is, for flowing as well as stationary media, for optically thick as well as optically thin media, and also for any transverse modes of incident pump beams

sepiolite deposits have been recently discovered in northeastern iran. however, there is still little information about its physicochemical and mineralogical characteristics. therefore, the collapse of the sepiolite (with sizes of < 63 μm) structure induced by temperature elevation in an electric furnace at 350, 550, and 850 °c for 4 hours was studied using x-ray diffraction (xrd) in combinatio...

several novel mononuclear zn(ii) complexes, [zn(bpy)l2], where bpy=2,2’-bipyridine and l=monoanions of phenylcyanamide (pcyd), 4-methylphenylcyanamide (4-mepcyd), 3,5-dimethylphenylcyanamide(3,5-me2pcyd),4-methoxyphenylcyanamide(4-meopcyd), 3,5-dimeth-oxyphenylcyanamide (3,5-meo2pcyd), 3-chlorophenylcyanamide (3-clpcyd), 2,3-dichlorophenyl-cyanamide (2,3-cl2pcyd), 4-bromophenylcyanamide (4-brpc...