958 resultados para Sulfur mines and mining
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Mode of access: Internet.
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Mode of access: Internet.
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"Bibliography of selected references": p. 607-609.
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v. I. The modern democracy, the citizen and the law - Legal ethics - Law : its origin, nature, development - Courts : federal and state - Law of contracts -- v. 2. Law of torts -- v. 3. Criminal Law - Law of criminal procedure - Law of persons and domestic relations -- v. 4. Personal property and bailments - Law of liens and pledges - Law of agency - Law of sales of personal property -- v. 5. Law of real property -- v. 6. Law of descent and distribution, wills and administration, guardian and ward - Law of landlord and tenant - Law of irrigation and water rights - Law of mines and mining -- v. 7. Equity - Law of trusts - Law of quasi-contacts - Law of estoppel -- v. 8. Law of negotiable instruments - Law of suretyship and guaranty - Law of mortgages : real and chattel - Interpretation of statutes -- v. 9. Law of private corporations - Law of partnership - law of banks, banking and trust companies - Law of receivers -- v. 10. Pleadings in civil actions at common law and under modern statutes - Practice in civil actions - Law of equity pleading - Law of evidence - Laws of attachment and garnishments - Law of judgments and executions - Law of extraordinary remedies - Law of habeas corpus -- v. 11. Constitutional law : definitions and general principles - Organization and powers of the United States Government - Constitutional guaranties of fundamental rights - Eminent domain - Taxation - Naturalization -- v. 12. Conflict of laws - International law - Law of interstate commerce - Law of bankruptcy - Law of patents - Law of copyright - Law of trademarks - Unfair competition and good-will -- v. 13. Law of public service companies, especially common carriers - Law of municipal corporations - Law of public officers and elections - Parliamentary law -- v. 14. Law of damages - Law of insurance - Admiralty law - Medical jurisprudence - Forms -- v. 15. Blackstone's Commentaries.
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Mode of access: Internet.
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Nos. [1]-240, 1882-91, form v. 1-13; nos. 241-310, 1892-Oct. 1897, have no volume numbers; nos. 311-336, Nov. 1897-1899, form v. 16, nos. 11-12, v. 17-18, no. 11.
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About pioneer days.--About big business.--About travel adventures.
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Senior thesis written for Oceanography 445
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Reduced organic sulfur (ROS) compounds are environmentally ubiquitous and play an important role in sulfur cycling as well as in biogeochemical cycles of toxic metals, in particular mercury. Development of effective methods for analysis of ROS in environmental samples and investigations on the interactions of ROS with mercury are critical for understanding the role of ROS in mercury cycling, yet both of which are poorly studied. Covalent affinity chromatography-based methods were attempted for analysis of ROS in environmental water samples. A method was developed for analysis of environmental thiols, by preconcentration using affinity covalent chromatographic column or solid phase extraction, followed by releasing of thiols from the thiopropyl sepharose gel using TCEP and analysis using HPLC-UV or HPLC-FL. Under the optimized conditions, the detection limits of the method using HPLC-FL detection were 0.45 and 0.36 nM for Cys and GSH, respectively. Our results suggest that covalent affinity methods are efficient for thiol enrichment and interference elimination, demonstrating their promising applications in developing a sensitive, reliable, and useful technique for thiol analysis in environmental water samples. The dissolution of mercury sulfide (HgS) in the presence of ROS and dissolved organic matter (DOM) was investigated, by quantifying the effects of ROS on HgS dissolution and determining the speciation of the mercury released from ROS-induced HgS dissolution. It was observed that the presence of small ROS (e.g., Cys and GSH) and large molecule DOM, in particular at high concentrations, could significantly enhance the dissolution of HgS. The dissolved Hg during HgS dissolution determined using the conventional 0.22 μm cutoff method could include colloidal Hg (e.g., HgS colloids) and truly dissolved Hg (e.g., Hg-ROS complexes). A centrifugal filtration method (with 3 kDa MWCO) was employed to characterize the speciation and reactivity of the Hg released during ROS-enhanced HgS dissolution. The presence of small ROS could produce a considerable fraction (about 40% of total mercury in the solution) of truly dissolved mercury (< 3 kDa), probably due to the formation of Hg-Cys or Hg-GSH complexes. The truly dissolved Hg formed during GSH- or Cys-enhanced HgS dissolution was directly reducible (100% for GSH and 40% for Cys) by stannous chloride, demonstrating its potential role in Hg transformation and bioaccumulation.
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The Peruvian economy depends for its growth on the export of natural resources and investment in the mining and hydrocarbon sectors. Peruvian governments and mining corporations have confronted anti-mining protests in different ways. While the current government has introduced policies of social inclusion to soften the negative effects of the operations of mining capital and policies of dialogue to engage social actors with the essence of governmental policies, mining companies use corporate social responsibility programs as a cover for the devastating effects of their operations on the environment and the livelihoods and habitats of the indigenous and peasant communities. Curiously, in the current context of the declining commodity prices and export volumes the Peruvian government strengthens its extractivist model of development. This article argues that whatever government that follows the rules of capital cannot but favor the corporations. It points out the main adversaries of the indigenous and peasant communities and the problems to transform the locally and/or regionally struggle into a nationwide battle for another development model.
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DSDP Hole 504B is the only hole in oceanic crust to penetrate through the volcanic section and into hydrothermally altered sheeted dikes. We have carried out petrologic and sulfur isotopic analyses of sulfide and sulfate minerals and whole rocks from the core in order to place constraints on the geochemistry of sulfur during hydrothermal alteration of ocean crust. The nearly 600 m-thick pillow section has lost sulfur to seawater and has net d34S = -1.8 per mil due to degassing of SO2 during crystallization and subsequent low temperature interaction with seawater. Hydrothermally altered rocks in the 200 m-thick transition zone are enriched in S and 34S (4300 ppm and +3.0 +/-1.2 per mil, respectively), whereas the more than 500 m of sheeted dikes contain 720 ppm S with d34S = +0.6 +/-1.4 per mil. These data are consistent with the presence of predominantly basaltic sulfur in hydrothermal fluids deep in the crust: following precipitation of anhydrite during seawater recharge, small amounts of seawater sulfate were reduced at temperatures >250°C through conversion of igneous pyrrhotite to secondary pyrite and minor oxidation of ferrous iron in the crust. The S- and 34S-enrichments of the transition zone are the results of seawater sulfate reduction and sulfide deposition during subsurface mixing between upwelling hot (up to 350°C) hydrothermal fluids and seawater. Seawater sulfate was probably reduced through oxidation of ferrous iron in hydrothermal fluids and in the transition zone rocks. Alteration of the upper crust resulted in loss of basaltic sulfur to seawater, fixation of minor seawater sulfur in the crust and redistribution of magmatic sulfur within the crust. This caused net increases in sulfur content and d34S of the upper 1.8 km of the oceanic crust.