In this approach, a pneumatic flow injection-tandem spectrometer system, without a delivery pump, has been developed to study chromium speciation. In this system, suction force of pneumatic nebulizer of a flame atomic absorption spectrometer has been used for solution delivery through the manifold. Cr(VI) and total Cr concentrations were determined using UV-Vis and FAAS spectrometers, respectiv...

Preliminary results are reported from the HERMES experiment at HERA/DESY for the spin asymmetry g 1 =F 1 and the polarised structure function g p 1 of the proton and for an extraction of polarised quark-distributions from a combination of Helium-3 and Hydrogen data The HERMES experiment at DESY uses the HERA 27.5 GeV polarised positron beam in combination with a polarised internal gas target to...

Several margarine base stock candidates have previously been prepared for the purpose of finding better, more oxidatively stable food components: high-saturate vegetable oils, randomized vegetable oils, vegetable oil-hard stock blends, and interesterified vegetable oil-hard stock blends. Here are reported the triacylglycerol compositions of these products, determined using reverse-phase high-pe...

The objective of this study was to determine the in vitro percutaneous penetration of silver and characterize the silver species released from textiles in different layers of full thickness human skin. For this purpose, two different wound dressings and a garment soaked in artificial sweat were placed in the donor compartments of Franz cells for 24 hours. The concentration of silver in the dono...

Microwave plasma torch (MPT), traditionally used as the light source for atomic emission spectrophotometry, has been employed as the ambient ionization source for sensitive detection of uranium in various ground water samples with widely available ion trap mass spectrometer. In the full-scan mass spectra obtained in the negative ion detection mode, uranium signal was featured by the uranyl nitr...

Elemental mercury has been imbued with magical properties for millennia, and various cultures use elemental mercury in a variety of superstitious and cultural practices, raising health concerns for users and residents in buildings where it is used. As a first step in assessing this phenomenon, we compared mercury vapor concentration in common areas of residential buildings versus outdoor air, i...

This contribution describes operation and results of a polarimeter, as it will be used for HER-MES, obtained at an atomic beam test source with test storage cells of mean wall collision numbers up to 3500. The HERMES experiment at the HERA electron storage ring is designed to study the spin structure of the nucleons. It will measure spin dependent deep inelastic scattering from the proton and n...

The accurate resonance frequency of the transition (F, M ) = (4, 0) ++(3 , 0) in the ground state of cesium-l33 is expressed In the form of an operational equation f o r an atomic beam spectrometer. Emphasized are the terms in this equation which correct for the beam direction dependence and radiation field dependence of measured resonance frequencies: F where i and j refer to opposite beam dir...

Background and Aims: The Clusiaceae family is known for its bioactive compounds with beneficial antioxidant anti-inflammatory properties. objectives of this study were to 1) identify quantify the individual polyphenol in methanolic extract from peel, pulp aril fruit Clusia quadrangula by UPLC-MSMS, evaluate their properties, 2) analyze fatty acid profile, minerals composition 3) determine antib...

The study was conducted on Manyera River, Niger State Nigeria due to the mining activities in the area as the river is mainly used as the source of livelihood of people around it. Samples of water, fishes and sediments were collected along the river course in March, 2013. Samples were persevered and taken to the laboratory for analysis by Cold Vapor Atomic Absorption Spectrometer. The water col...