Phytochemical screening of solvent extracts from Callilepis laureola plant was studied. Methanol and water extracts, respectively, revealed that phytochemical constituents found in both extracts were phenolics and gums. Reducing sugars were only observed in water extract while phytosterols and flavanoids were only found in methanol extract. Other phytochemical constituents such as saponins, gly...

[1] We collected 56 marine gravity cores from the Pacific seafloor offshore Central America which contain a total of 213 volcanic ash beds. Ash-layer correlations between cores and with their parental tephras on land use stratigraphic, lithologic, and compositional criteria. In particular, we make use of our newly built database of bulk-rock, mineral, and glass major and trace element compositi...

Phytochemical screening of solvent extracts from Callilepis laureola plant was studied. Methanol and water extracts, respectively, revealed that phytochemical constituents found in both extracts were phenolics and gums. Reducing sugars were only observed in water extract while phytosterols and flavanoids were only found in methanol extract. Other phytochemical constituents such as saponins, gly...

The design of geotextile containers for dewatering applications typically requires good retention of the confined fill material solids. This becomes difficult to achieve when the fill material is fine grained and the pore openings are large. Furthermore, the proper retention becomes critical if the confined material is contaminated. Fly ash is one of the fine-grained geomaterials that exhibit b...

The slagging and fouling characteristics of the heat recovery steam generator (HRSG) for ferrosilicon electric furnaces are discussed in this paper. Three ash samples were taken from the HRSG of a ferrosilicon furnace in Ningxia Province, China, which suffered from serious slagging and fouling. X-ray fluorescence (XRF), X-ray powder diffraction (XRD) and scanning electron microscope (SEM) were ...

Context: Nigella sativa Linn. (Ranunculaceae) is native to southwest Asia. This tree species has been of interest to researchers because it has a long history of folklore usage in various systems of medicines. Objective: Pharmacognostic Standardization, Physico and Phytochemical Evaluation of the seeds of N. sativa were carried out to determine its macro-and microscopical characters and also so...

The fine localization of mineral matter in spores of Bacillus megaterium and Bacillus cereus was studied by the technique of microincineration adapted for use with the electron microscope. The specimens, which included intact and thin-sectioned spores as well as shed spore coats, were burned either in the conventional way at high temperature or by a new technique using electrically excited oxyg...

A study of sulfur-rich sludge (71.6% pyrite) dissolution at alkaline conditions (pH ca.9) was investigated using non-stirred and stirred flow-through experiments at room temperature (26 ± 1.2oC) and O2 partial pressure of 0.20 atm. The dissolution rate of pyrite-rich sludge was calculated based on the S release (aqueous SO4) at the steady-state. Results show that: (1) in the nonstirred reactor ...