In Harrow, we have a community of Asians who originate from Gujarat-a state in north-west India. A study was set up to investigate the trace metal status in this group of Asian vegetarians and non-vegetarians and in a white control group, because the increased demands of pregnancy could precipitate a deficiency in women with marginally adequate diets. The trace element study is part'of a much l...

Introduction: Chondrite matrix is defined as 'the fine-grained, predominantly silicate, material intersti-tial to macroscopic, whole or fragmented, entities such as chondrules, inclusions and large isolated mineral (i.e., silicate, metal, sulphide and oxide) grains' [1]. Matrix materials are derived from a wide variety of sources: presolar grains, solar-nebular condensates, and finely ground li...

On present evidence, 26 of the 90 naturally occurring elements are known to be or are claimed to be essential for animal life. These consist of 11 major elements (carbon, hydrogen, oxygen, nitrogen, sulphur, calcium, phosphorus, potassium, sodium, chlorine and magnesium) and 15 elements generally accepted as trace elements (iron, iodine, copper, manganese, zinc, cobalt, molybdenum, selenium, ch...

(h) Controlled-release glass boluses (35 g) for use in sheep. The bolus contains by weight 13.4% copper. 0.5% cobalt and 0.3% selenium in a soluble glass matrix. (i) Sustained-release rumen bolus (80 g) for cattle. The bolus is composed of a compressed mixture of copper. cobalt. selenium. manganese. zinc. iodine and vitamins A. D and E. The round end of one bolus has been removed to show the 25...

Despite the influence that amphibians have on the flow of energy and nutrients in ecological systems, the role that amphibians play in transporting contaminants through food webs has received very little attention. This study was undertaken to investigate bioaccumulation of trace elements in amphibians relative to other small aquatic organisms in a contaminated wetland. We collected bullfrog la...

In the quest for finding the ideal synchrotron-radiation-induced imaging method for the investigation of trace element distributions in human bone samples, experiments were performed using both a scanning confocal synchrotron radiation micro X-ray fluorescence (SR-µXRF) (FLUO beamline at ANKA) setup and a full-field color X-ray camera (BAMline at BESSY-II) setup. As zinc is a trace element of s...

Correlation analyses were conducted on nickel (Ni), vanadium (V) and zinc (Zn) oral bioaccessible fractions (BAFs) and selected geochemistry parameters to identify specific controls exerted over trace element bioaccessibility. BAFs were determined by previous research using the unified BARGE method. Total trace element concentrations and soil geochemical parameters were analysed as part of the ...

Major and trace element abundances were determined on powders prepared from four distinct chips from Allan Hills (ALH) 84001 to constrain the bulk rock composition, and to assess the trace element abundances of orthopyroxenes and phosphates. Our new determinations were used to evaluate the composition of the parental melt of this stone. An unrealistic light rare earth element (REE)-enriched par...

In this paper we study triangularization of collections of matrices whose entries come from a finite-dimensional division ring. First, we give a generalization of Guralnick's theorem to the case of finite-dimensional division rings and then we show that in this case the reduced trace function is a suitable alternative for trace function by presenting two triangularization results. The first one...