background: phenol, as a pure substance, is used in many fields because of its disinfectant, germicidal, local anesthetic, and peptizing properties. aqueous solutions of phenol are produced as waste in industries and discharged into the environment. therefore, elevated concentrations of phenol may be found in air or water because of industrial discharge or the use of phenolic products. method: ...

The effects of some synthetic sweeteners on the rheological and physical properties of guar gum in dilute solutions were investigated.Measurements include the determination of intrinsic viscosity and the particle size, surface weighted mean [D3, 2], volume weighted mean [D4,3] and specificsurface area ofguar gum andsyntheticsweeteners mixtures. T...

In recent years, the scientific community has made some dramatic advances in the ability to chemically synthesize genomelength strands of DNA. These advances have coincided with a growing understanding of the functions of individual genes and gene networks. With the available knowledge of how whole genomes function, and the technical capability of synthesizing whole genomes, it will be possible...

iron, cobalt and copper are metals, which appear together in many real samples, both natural and artificial. recently a classical univariate micellar colorimetric method has been developed for determination of these metal ions. the organized molecular assemblies such as micelles are used in spectroscopic measurements due to their possible effects on the systems of interest. the ability of micel...