Ground spices are food ingredients that can enrich the taste, aroma and taste of dishes have a very limited service life. Many manufacturers use formalin as preservative to overcome short shelf life ground spices. Formalin is clear, colorless or almost liquid with pungent odor. The prohibited in Regulation, because formaldehyde toxic (poisonous). This study identified content instant market Mal...

The avocado plant (Persea Americana Mill.) is a medicinal and belongs to the Lauraceae family which has many properties. Avocado skin contains flavonoid compounds that can be used protect reduce damage due UV rays. active substances contained in americana are flavonoids quercetin. In sample on quercetin as standard solution from peel for avocado. This study aims determine levels of antioxidant ...

gabapentin is an anticonvulsant widely used in the treatment of epilepsy. no peculiar chromophore is available on the gabapentin moiety for direct analysis by absorption spectrophotometry. a sensitive spectrophotometric method for the determination of gabapentin in bulk, pharmaceutical formulations and human plasma has been developed. in this method, gabapentin directly derivatized with vanilli...

Objective: Honey is a natural sweet substance known for various health benefits and used in many traditional medicines dietary supplements. It contains bioactive constituents like sugars, amino acids, polyphenols, flavonoids minerals. Quality control of honey an essential part ensuring its therapeutic usage. In the present study, was analyzed by using spectroscopic approaches physicochemical me...

ABSTRACT The objectives of this study were to investigate the effects different concentrations Suaeda rigida polysaccharides (SRPs) on physiological characteristics frog heart and gastrocnemius muscle, compare their similarities differences, analyze mechanisms. CaCl2 acetylcholine (Ach) selected respectively be co-incubated with high concentration SRPs observe contraction frog. activities acety...

UV-visible and atomic spectrophotometry and HPLC techniques were applied for the determination of tetracycline (TC) in pharmaceutical preparations via complexation of the drug with Au(III) and Hg(II) ions in solutions. The mole ratio of TC to metal ions was 1 : 1. Maximum peak absorption at λ 425 and 320 nm for the two ions, respectively, was optimized at heating temperature 75°C for 15 minutes...

Polyamine ligands are very versatile compounds due to their water solubility and flexibility. In the present work, we have exploited the binding ability of a polyamine molecular linker (L (2-)) bearing different functional groups, which favors the self-assembling of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) into 1D nanochains in aqueous solution. The chainlike assemblies of Au...

Solution equilibrium studies on Cu(2+)-L(1)-L(2) ternary systems have been performed by pH-potentiometry, UV-Vis spectrophotometry and EPR methods {where L(1) corresponds to a polyamine such as ethylenediamine (en), diethylenetriamine (dien), N,N,N',N',N″-pentamethyldiethylenetriamine (Me(5)dien)} and L(2) denotes 2-aminoethylphosphonic acid (β-alaninephosphonic acid)}. The results suggest the ...

Magnesium fluoride is an ultraviolet (UV) transparent material which is widely used in optical applications over a wide wavelength range. We have developed a novel atomic layer deposition (ALD) process for depositing magnesium fluoride thin films for the first time. MgF2 films were grown at 250–400 uC using Mg(thd)2 and TiF4 as precursors. The crystallinity, morphology, composition, thicknesses...