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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
681

Action of autochthonous bacteria on the decay of enteric viruses in groundwater /

Wall, Katrina. January 1900 (has links)
Thesis (Ph.D.)--Murdoch University, 2006. / Thesis submitted to the Division of Science and Engineering. Includes bibliographical references (leaves 148-163)
682

Aspects of the environmental chemistry of technetium /

Gawenis, James Allen, January 2001 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.
683

The struggle for access to land and water resources in Zimbabwe : the case of Shamva District /

Matondi, Prosper Bvumiranayi. January 2001 (has links)
Thesis (Ph. D.)--Swedish University of Agricultural Sciences, 2001. / Errata slip inserted. Includes bibliographical references.
684

Effluents from an aquaculture research station and stream water quality

Soongsawang, Suthira. Boyd, Claude E., January 2010 (has links)
Thesis (Ph. D.)--Auburn University. / Abstract. Includes bibliographical references (p. 64-67).
685

The application of differential pulse stripping voltammetry in the determination of trace metals in wet precipitation /

Le Roux, Shirley Theodora Rose. January 1900 (has links)
Thesis (MTech (Physical Sciences))--Peninsula Technikon, 1999. / Word processed copy. Summary in English. Includes bibliographical references (leaves 75-79). Also available online.
686

Water treatment system for bottled water

Kopzhanova, Aiym 25 November 2013 (has links)
Without water, as is known, there is no life. A person uses about 75 tons of water for the whole life. Thereby, about 80% of diseases come with water people drink because it is simply dirty, according to Louis Pasteur. The fact is that consuming tap water leads to 85 known diseases that result in twenty-five million deaths each year. In addition, dirty water consumption accelerates the aging process by 30%. Tap water is drinkable, but not necessarily beneficial. The fact that the dirty water flows out of the tap means that the water contains a large quantity of chemical and mechanical impurities as well as a variety of viruses and bacteria. For example, if a person drinks water with high content of iron for a long time, the possibility of getting liver disease is high. The tap water quality that has always been consumed by people from Zhezkazgan, Republic of Kazakhstan violates even the required standards for tap water. Therefore, any kind of water business is encouraged in that area. The most viable way to help this problem is bottled water production. The great number of papers and materials was used, analyzed and delivered in this report. In addition, a Russian company, Ecodar LLP, was contacted to acquire information about the most advanced technology in water treatment field. This report provides general description of water treatment technology to start a bottled water production business in Zhezkazgan / text
687

Analytical methods and strategies for using the energy-water nexus to achieve cross-cutting efficiency gains

Sanders, Kelly Twomey 17 February 2014 (has links)
Energy and water resources share an important interdependency. Large quantities of energy are required to move, purify, heat, and pressurize water, while large volumes of water are necessary to extract primary energy, refine fuels, and generate electricity. This relationship, commonly referred to as the energy-water nexus, can introduce vulnerabilities to energy and water services when insufficient access to either resource inhibits access to the other. It also creates areas of opportunity, since water conservation can lead to energy conservation and energy conservation can reduce water demand. This dissertation analyzes both sides of the energy-water nexus by (1) quantifying the extent of the relationship between these two resources and (2) identifying strategies for synergistic conservation. It is organized into two prevailing themes: the energy consumed for water services and the water used in the power sector. In Chapter 2, a national assessment of United States' energy consumption for water services is described. This assessment is the first to quantify energy embedded in water at the national scale with a methodology that differentiates consistently between primary and secondary uses of energy for water. The analysis indicates that energy use in the residential, commercial, industrial, and power sectors for direct water and steam services was approximately 12.3 quadrillion BTU or 12.6% of 2010 annual primary energy consumption in the United States. Additional energy was used to generate steam for indirect process heating, space heating, and electricity generation. Chapter 3 explores the potential energy and emissions reductions that might follow regional shifts in residential water heating technologies. Results suggest that the scale of energy and emissions benefits derived from shifts in water heating technologies depends on regional characteristics such as climate, electricity generation mix, water use trends, and population demographics. The largest opportunities for energy and emissions reductions through changes in water heating approaches are in locations with carbon dioxide intensive electricity mixes; however, these are generally areas that are least likely to shift toward more environmentally advantageous devices. In Chapter 4, water withdrawal and consumption rates for 310 electric generation units in Texas are incorporated into a unit commitment and dispatch model of ERCOT to simulate water use at the grid scale for a baseline 2011 case. Then, the potential for water conservation in the power generation sector is explored. Results suggest that the power sector might be a viable target for cost-effective reductions in water withdrawals, but reductions in water consumption are more difficult and more expensive to target. / text
688

Physicochemical aspects of particle breakthrough in granular media filtration

Kim, Jinkeun, 1968- 02 August 2011 (has links)
Not available / text
689

A study of habitat, growth and nutrition of water hyacinth in Hong Kong

Lam, Siu-man., 林少文. January 1991 (has links)
published_or_final_version / abstract / toc / Botany / Master / Master of Philosophy
690

Growth of Pseudomonas cepacia in double distilled water

Doyle, Jack David January 1981 (has links)
No description available.

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