The application of comparator instrumental neutron activation analysis (INAA) combined with the internal standard method was considered to analyze solid volumetric samples different rocks, 15–20 g mass, for Au content. Fe used as its mass fraction determined by X-ray fluorescence (XRF) help a laboratory energy dispersive XRF spectrometer RLP-21T, Kazakhstan. puck-like about 29 mm across diamete...

landfill and incineration are two common methods mostly used for disposal of huge quantities of solid wastes. the bioconversion ability of earthworms in vermicomposting process of organic waste in different types of bedding materials was investigated to produce more valuable products as an economical and effective alternate method for solid waste management. in this work organic waste (obtained...