The Gorgan Bay is an important ecosystem receiving discharge from their tributaries. In this study, concentration of Pb, Zn, Ni, Fe, Al, Cu and As was seasonally determined at 22 sampling points during 2012-2013.Sediment samples were collected using a Van Veen grab. The levels of heavy metals were determined by ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry) and AAS (Atomic Ab...

Improved baseplate materials are required to provide superior reliability and heat transfer as IGBT power density increases. The key is for the baseplate thermal coefficient of expansion (TCE) to be matched to the module design and to have sufficient thermal conductivity (κ). Aluminum Silicon Carbide (AlSiC), a metal matrix composite material, provides a TCE that is compatible with the attachme...

The aim of the study was to determine whether using chemical and radiochemical analysis of lake sediments can highlight changes in the climate. Also it was studied whether human impact on the environment can be observed and to what extent such changes are in agreement with historical data. Samples of 16 cm thick sediment cores from the Smreczynski Staw Lake were collected and divided into 1 cm ...

The antimicrobial properties of copper have been recognized for several years; applying these properties to the prevention of diseases such as bovine mastitis is a new area of research. The aim of the present study was to evaluate in vitro the antimicrobial activity of copper on bacteria isolated from subclinical and clinical mastitis milk samples from two regions in Chile. A total of 327 micro...

Pair-fed rats were given diets containing 250 ppm added Cu with or without 5% Senecio jacobaea (S J), a poisonous plant containing the highly toxic pyrrolizidine alkaloids (PA). Levels of Cu, Zn and Fe were determined in whole liver, kidney, spleen, serum and subcellular fractions of liver. Serum ceruloplasmin and hematocrit values were also obtained. At 5 wk, a 7.5-fold increase in liver Cu wa...

Sustainable Aqueous Nanomaterials In article number 2204459, Pawel M. Kozlowski, Sachin Handa, and co-workers show that, when irradiated, aqueous micellar nanomaterial containing Cu(II) nanoparticles in-situ provides micelle-bound Cu(I) species via single electron transfer, enabling ppm level powerful catalysis in water as a sustainable reaction medium.

Effects of supplemental dietary Zn levels of 0, 50, 500 and 5,000 ppm on the mineral concentration in milk of first- and second-parity sows were evaluated. Colostrum from sows fed 5,000 ppm of supplemental Zn contained less Cu and P than colostrum from sows on the other treatments. Calcium was reduced in the colostrum from sows fed 0 or 5,000 ppm Zn. Copper was reduced and Zn increased in milk ...