This review is devoted to answering the important question of physical and chemical aspects of dating archaeological remains, particularly, ancient structures. Basically, stratigraphy and typology are considered relative dating techniques while radiocarbon dating, dendrochronolog...
Open access
Research Article10.9734/AJOPACS/2018/40349
In the present work, optimization of extraction natural dye from neem (Azadirachta indica) leaves with respect to dye bath concentration on silk fabric was studied before and after exposing to artificial daylight for 160 h. The effect o...
Open access
Research Article10.9734/AJOPACS/2018/40614
Objectives: The objectives of this research are 1) to examine the units of parameters in quasi-steady state approximation (QSSA) equations (inequalities) with a view to confirming or otherwise the dimensional consistency, 2) to slightly modify the general equation of rate constan...
Open access
Research Article10.9734/AJOPACS/2018/40904
2-Dimensional imaging was used to investigate the presence of leachate and contaminant plume around septic tank within the Staff Quarters in University of Benin, Benin City, Nigeria. This conventional 2-D electrical resistivity survey method was carried out by engaging the Wenner...
Open access
Research Article10.9734/AJOPACS/2018/40338
PbSe thin films were electrodeposited onto ITO substrate with variation of deposition voltage (1-5V). The deposited thin films were characterized using the four point probe technique to determine their electrical properties. The sheet resistivity of the thin films was found to v...
Open access
Research Article10.9734/AJOPACS/2018/40383
By applying quantum tunneling effect for photons generated from ZPF vacuum, it is considered that some of them can be generated as superluminal particle. If they have electric charges, they radiated electromagnetic energy by the Cherenkov effect. This leads to another explanation...
Open access
Research Article10.9734/AJOPACS/2018/40340
Total petroleum hydrocarbon (TPH) is of immense interest to environmental chemist because they are toxic to human system and animals. Some of the TPH compounds are carcinogenic and poses serious health problem to humans and aquatic life. Hence, there is need for continuous check...
Open access
Research Article10.9734/AJOPACS/2018/38035
Fused pyrimidines,2,4,6,8-Tetrahydro-5-(4/-ethylphenyl)-10-aryl-2,4,6,8-tetraoxo-5H,10H-pyrido[2,3-d:6,5-d/]dipyrimidines, were prepared in good yield through a simple, clean and three-component one-pot cyclo-condensation reaction of a barbituric acid, aromatic aldehyde and 4-eth...
Open access
Research Article10.9734/AJOPACS/2018/39709
Aims: The following study is aimed to prepare five derivatives of 2-thiobarbituric acid under microwave irradiation (MWI) and conventional heating method and investigate their biological activities. Study Design: A classic white ProLine Microwave (720 W, 2450 MHz) with nine power...
Open access
Research Article10.9734/AJOPACS/2018/40562
This work presents the results of sorption studies of orange G and phenol Red dyes onto palm kernel shell activated carbon (PKS-AC). The adsorbent was prepared by chemical activation using zinc chloride. The effect of various parameters such pH, initial ion concentration, contact...
Open access
Research Article10.9734/AJOPACS/2018/39338