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Lead levels and sources of exposure in migratory game birds after the implementation of lead-free shot in CanadaStevenson, Amy L. January 2002 (has links)
No description available.
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SSRT of 10-4 FeCrAl in LBE and Pb to Characterize Liquid Metal Embrittlement Effects / SSRT-Testing av 10-4 FeCrAl i LBE och Pb för karakterisering av LMEStein, Daniel January 2022 (has links)
In this work the susceptibility of Fe-10Cr-4Al steel to liquid metal embitterment (LME)in low oxygen environment was investigated. slow strain rate testing (SSRT) wereconducted on 10-4 FeCrAl steel in a stagnant lead from 340-480◦C, lead-bismutheutectic (LBE) from 140-450◦C and lead-bismuth mixture at 375◦C with increasingbismuth content from 0.1wt%-40wt%. The results showed that in the stagnant leadenvironment the FeCrAl steel showed no sign of LME with all samples being subjectedto around 25% strain before final break. In LBE the samples were affected by LMEespecially at 350-400◦C. The total elongation to failure reduced in LBE from 25%to 13.1% and a ductility trough from 190-400◦C was observed. In the lead-bismuthmixture there was a reduction in ductility at 5wt% going from 25% to 20% totalelongation, at 15wt% going from 20% to 16% total elongation and at 30wt% going from16% to 13% total elongation. / I det här arbetet har stålet Fe-10Cr-4Al känslighet till liquidmetal embrittlemnt(LME)i låga syre miljöer av flytande bly, mellan 340-480 °C, och Bly/Vismut eutektisk (LBE),mellan 140-450 °C, undersökts. En stegvis ökning av Vismut halten i flytande blygenfördes också från 0.1 wt% Bi till 40 wt% Bi med en fast temperatur på 375 °C.Resultaten från dessa experiment visade att i ren bly miljö så visade stålet Fe-10Cr-4Al inga tecken på LME, alla prover gick till brott runt 25% strain. I LBE blev ståletsvårt på verkat av LME, framför allt inom temperaturer intervallet 350-400 °C. Dentotala förlängningen av proverna blev här reducerat från 25% ner till 13.1% och en klarduktilitets tråg mellan 190-400 °C kunde observeras. I experimenten med gradvisökande Vismut halt observerades markanta nedgångar i stålets duktilitet vid 5 wt%Bi då den droppar från 25% till 20% förlängning, nästa dropp observerades vid 15 wt%Bi, 20%-16% och vid 30 wt% Bi med ett reduktion från 16% till 13%.
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Attityder och uppfattningar om bly kontra blyfri ammunition bland svenska jägare / Attitudes and perceptions about lead versus lead-free ammunition among Swedish huntersSundström, Ellen January 2023 (has links)
This study aimed to examine Swedish hunters' attitudes towards the use of leaded and lead-free ammunition, focusing on their perceptions regarding a potential transition to exclusive lead-free ammunition use. A questionnaire was utilized to gather insights from Swedish hunters about their attitudes and preferences. The results highlighted that the selection of ammunition type is primarily influenced by factors such as performance, availability, and costs. Notably, enhanced familiarity with non-leaded ammunition through increased usage correlated with more positive attitudes towards its adoption. The study also underscored the need to address sentimental values associated with traditional weapons and ammunition in balancing environmental and health considerations. Moreover, it delved into the varying factors influencing decision-making and explored the attitudinal differences between hunters who use lead and lead-free ammunition. In conclusion, it was found that the choice of ammunition among Swedish hunters isn't significantly influenced by gender or age, with lead ammunition being the preferred choice. Despite perceived hurdles associated with non-leaded ammunition, such as performance, cost, and availability, these barriers seemed to diminish with increased familiarity and experience, suggesting that focused education and improved availability could promote its adoption. As such, while perceptions about performance, cost, and availability are critical in hunters' choice of ammunition, these perceptions may evolve with a greater understanding and experience with lead-free alternatives.
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Uptake of Lead by Iron Corrosion Scales: Effects of Iron Mineralogy and OrthophosphateWasserstrom, Lauren W. 24 October 2014 (has links)
No description available.
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PRACTICALITY OF USING AIR LEAD MEASUREMENTS BY PORTABLE X-RAY FLUOURESCENCE TO MANAGE WORKER PROTECTION PROGRAMSBOCK III, EDWARD LAWRENCE January 2002 (has links)
No description available.
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AEROSOLIZATION DURING INDOOR LEAD ABATEMENTCHOE, KYOO-TAE 11 October 2001 (has links)
No description available.
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PATHWAYS OF CHILHOOD LEAD EXPOSURE IN THECITY OF MILWAUKEE, WISCONSINNagaraja, Jyothi January 2013 (has links)
No description available.
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Thermoelectric properties of rare-earth lead selenide alloys and lead chalcogenide nanocompositesThiagarajan, Suraj Joottu 11 December 2007 (has links)
No description available.
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Uranium-lead isotopic investigation of the Archean Imataca complex, Guayana shield, Venezuela.Montgomery, Carla Paige Westlund January 1977 (has links)
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND LINDGREN. / Vita. / Bibliography : leaves 248-259. / Ph.D.
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Lead silicate solubility and the control of lead contamination in drinking waterWeaver, Cameron L. 11 July 2009 (has links)
The intake of lead into the human body has become an area of major concern because high levels of lead are harmful and can cause physiological damage, especially in children. It has been suggested that adding NaSiO₃might control Pb²⁺ contamination of drinking water supplies (c.g., Thresh 1922). PbSiO₃ (am), the white, gelatinous precipitate formed by mixing Na₂SiO₃ solutions with Pb²⁺ bearing solutions, dissolves at pH<7 by the reaction:
PbSiO₃ + H₂O + 2H⁺ = Pb²⁺ + H₄SiO₄
Measurements of the solubility of PbSiO₃ show that the K<sub>eq</sub> for this reaction is 7.41x10⁵ and the ΔG<sub>f</sub>° (PbSiO₃ (am)) is 1061.81 kJ mol⁻¹. This high value of K means that extreme amounts of a Na₂SiO₃ additive are required in a water supply system to reduce the Pb²⁺ concentration to the EPA MCL action level of 15 ppb. Furthermore, the high pH values that result from NaSiO₃ water treatments lead to the formation of lead hydroxycarbonate (hydrocerussite) because this carbonate phase is more stable in the pH range of natural waters (pH 5-8) than lead silicate. / Master of Science
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