In accomplishing successful electrospray ionization analyses, it is imperative to have an understanding of the effects of variables such as analyte structure, instrumental parameters, and solution composition. Here, we review some fundamental studies of the ESI process that are relevant to these issues. We discuss how analyte chargeability and surface activity are related to ESI response, and h...

Solar thermal fuels (STFs) harvest and store solar energy in a closed cycle system through conformational change of molecules and can release the energy in the form of heat on demand. With the aim of developing tunable and optimized STFs for solid-state applications, we designed three azobenzene derivatives functionalized with bulky aromatic groups (phenyl, biphenyl, and tert-butyl phenyl group...

The growing interest in Ghana’s gold mining sector due to the recent upsurge in the price of gold has impacted greatly on the economy of the country with regard to its revenue generation capacity. There is therefore the need to develop this sector. Hence, any new method which is relatively low cost and has comparable efficiency compared to prevailing conventional methods in delineating new pote...

The mineral alteration patterns in high- to low-temperature geothermal fields affect the induced polarization (electrical conductivity and chargeability) properties of volcanic rocks. Indeed, these are sensitive cation exchange capacity porosity rock, which both dependent on path, temperature, depth burial. Therefore tomography appears as a powerful non-intrusive geophysical method investigate ...

Thorough knowledge of soil lithology and its properties are considerable importance to agriculture. These parameters have a direct impact on water permeability the content in soil, which represent significant factors crop yield, decisively determining design irrigation systems farming processes. In framework this study, considering inevitable impacts climate change, rational management resource...

Complex conductivity measurements of carbonate rocks are scarce despite the occurrence these at surface Earth. The complex spectra 57 samples were measured in a broad frequency range and four salinities (NaCl). A simple model induced polarization is developed to be applied field. in-phase (related conduction) reported as function pore water determine (intrinsic) formation factor conductivity. n...

Electrical Resistivity Imaging (ERI) has emerged as an important technique in geophysical surveys for gaining more information and locating hidden water. This method was used at Parit Raja, Johorto investigate the location of underground water storage. Two-dimensional (2D) geoelectrical imaging been this study. The three different locations study area to identify potential aquifer suitable bore...

Ž . A Time Domain Electromagnetic TDEM survey was carried out in and around the caldera of the Fogo volcano, Cape Verde Islands, to detect the low resistive structures that could be related to groundwater. A sign reversal in the sounding curves was encountered in central-loop measurements for the soundings located in the centre of the caldera along three main radial profiles. The negative trans...