the study aimed to come up with a list of specific macroalgae species, which could be used to biomonitor specific metal elements in the coastal waters of east africa. water extraction, edta, aqua regia extraction and optimized bcr 3-step sequential extracts were used to mimic bioavailable metals under various environmental conditions. the results indicated that ulva lactuca could be used as a b...

Introduction: Fe (T1/2= 1.49 My) is a key a short-lived radioactive nuclide because it is the only one for which an origin from irradiation by cosmic rays is impossible. Fe is a neutron-rich nuclei and its production rate during irradiation processes around the early Sun (because of the low cross sections of appropriate reactions and of the low abundance of targets) is at least two orders of ma...

During a period of 60 days assays were carried out with the moss Pohlia nutans transplanted from an uncontaminated control site to a dump consisting of a heavily polluted mine and smelter wastes located near wałbrzych in southwestern Poland. within the same period also samples of native P. nutans growing on the dump substrate were collected together with the same species from a control site. Co...

We report Ni isotope ratio results for Ni from metal in iron meteorites and from metal and olivine in pallasites. The investigation of pallasites was undertaken because (1) previous work on pallasites showed evidence for in situ decay of Mn (t1⁄2 = 3.7 Ma) in olivines [1,2] and of Pd (t1⁄2 =6.5 Ma) in metal [3]; (2) evidence for the in situ decay of Fe (t1⁄2 = 1.5 Ma) in eucrites [4,5]; (3) pos...

We evaluated the levels of essential elements as Cu, Cr, Fe and Zn, and toxic elements as Al, Ni, Pb and Cd in a total of 40 samples of different legumes and 56 samples of different nuts, that are widely consumed in Spain. These elements were determined in the samples mineralized with HNO(3) and V(2)O(5), using electrothermal atomic absorption spectrometry (ETAAS) as the analytical technique. R...

Abstract Reforming of toluene with model exhaust gas was carried out as Reformed EGR gasoline engine mainly at 773 K Ni-M/Mg/Al (Ni 12 wt%, M = Fe, Co, Cu) prepared from corresponding hydrotalcite-like compounds. Ni-Fe/Mg/Al (Fe/Ni = 0.1–0.5) showed clearly higher performance than Ni/Mg/Al in terms activity, coke-deposition resistance and stability. In contrast, (M/Ni = 0.25, M = Co, similar be...

It is shown that if the Al inventory of the early solar system, taken as (Al/Al) , is a result 25 5 5 # 10 , of injection of fresh debris from a Type II supernova (SNII), then Fe/Fe would have to be between 3 # and . This inferred correlation of Al and Fe is based on the observation that both nuclei are 27 25 10 1 # 10 produced dominantly in the O/Ne zone and that for SNII ejecta Al/Fe is betwe...

Introduction: ECIGs are currently under scrutiny concerning their safety, particularly in reference to the impact ECIG liquids (E-liquids) have on human health. One concern is that aerosolized E-liquids contain trace metals that could become trapped in respiratory tissues and induce pathology. Methods: To mimic this trapping, peristaltic pumps were used to generate and transport aerosol onto mi...