Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 1998 for “"chemicals"”.
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Toxicology of endocrine disrupting chemicals
Endocrine disrupting chemicals (EDCs) are defined by the World Health Organization’s International Program on Chemical safety as “An exogenous substances or mixture that alters the functions of the endocrine system and consequently causes an adverse effect in an intact organism or its progeny, or …
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Erosion-corrosion mitigation using chemicals
The presence of entrained sand in oil and gas production is becoming increasingly prevalent as wells age and this is leading to erosion-corrosion in C02-saturated conditions becoming a major mechanism of material attack. Its understanding, prediction and control are key challenges to sound …
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Cytological effects of certain organic chemicals
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Botany and Plant Pathology, 1952
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Biorefining Sewage for Energy and Green Chemicals
Anaerobic digestion (AD) has become a well-established method for the treatment of organic wastes, such as sewage sludge, whilst recovering valuable products in the process. Typically, AD produces biogas in the form of carbon dioxide and methane but environmental concerns surrounding fugitive …
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Active hyperspectral imaging of chemicals on surfaces
… is a promising technique for the detection of chemicals at standoff distances. In active HSI, a target is illuminated by a laser source at many different wavelengths and a camera obtains an image of the illuminated scene at each wavelength. In this research, the feasibility of hyperspectral …
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Atlantic Green Chemicals : bio-glycol plants : business plan
Atlantic Green Chemicals (AGC) has made a license agreement with its sister company Icelandic Process Development (IPD) about building and managing three Glycerin to Glycols Plants based on IPD patent that transforms glycerin (a byproduct from bio-diesel production) to Propylene Glycol (PG) using …
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Analytics of endocrine disrupting chemicals in environmental matrices
De laatste jaren is er een toenemende maatschappelijke bezorgdheid en wetenschappelijke discussie ontstaan rond de verspreiding en de mogelijke effecten van stoffen met een vermoedelijke of bekende hormoonverstorende werking. Het huidige doctoraatsonderzoek kadert binnen deze problematiek en …
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Citrus Limonoids: Functional Chemicals in Agriculture and Foods
The search for limonoids started long back when scientists started looking for the factor responsible for bitterness in citrus. Studies showed that limonoids are highly oxygenated, modified terpenoids and have recently attracted attention because compounds belonging to this group have exhibited a …
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Warehouse network design for a commodity chemicals manufacturer
… warehouse network belonging to a Thai commodity chemicals manufacturer. The objective is to determine an optimal warehouse network configuration that minimizes the firm's total transportation and warehousing cost. Inventory turns and storage capacity constraints are found to be the key drivers of …
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A Survey of Superfund Chemicals in Massachusetts Farms
Heavy metals and organic pollutants in the environment can present a public health threat, and understanding how different pollutants are distributed in our agricultural resources and in the food chain is fundamental to predicting and preventing their negative health impacts. The purpose of this …
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Green Photochemistry: The synthesis of fine chemicals with sunlight
This research examines the dye-sensitised photooxygenation procedure as a case study to demonstrate ‘green’ photochemistry. There are three main streams to the research, namely the optimisation of juglone (5-hydroxy-1,4-naphthoquinone) synthesis under green conditions, the extension of the …
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Liberal environmentalism and the international law of hazardous chemicals
… environmental negotiations on hazardous chemicals (including wastes), and the implications of these norms for the protection of the environment and human health from the thousands of chemicals on the market. The key trait of liberal economic norms in relation to global environmental …
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Public awareness and risk perceptions of endocrine disrupting chemicals
Endocrine disrupting chemicals (EDCs) are exogenous chemicals found in food, consumer products, and the environment. EDCs are ubiquitous in modern life and human exposure is associated with many negative health effects such as reproductive disorders, metabolic disorders, and hormone related …
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Investigation of Chalcopyrite Leaching Kinetics by Alternative Leaching Chemicals
Chalcopyrite (CuFeS2) is one of the most abundant sulfide minerals in the world copper deposit. It is known as a refractory sulfide mineral due to passivation during leaching process in a conventional leaching system. In this study, alternative lixiviants, MSA (methanesulfonic acid, CH4SO3) and …
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Resource efficiency and chemicals: energy, emissions and material flows
Industrial chemicals and their derivatives are all-pervasive. Plastic, rubber and synthetic textiles adorn our buildings, vehicles and countless other elements of the modern built environment. Modern agricultural systems could not function at their current level of output without synthetic …
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Marine dock optimization for a bulk chemicals manufacturing facility
… on marine dock optimization for a major bulk chemicals manufacturer. The authors have surveyed the research literature to find commonalities in various approaches to the problem of dock optimization- in the petrochemical shipping industry as well as in allied operational environments such as …
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Electrocatalytic Conversion of Carbon Dioxide to Value-Added Chemicals
… provides another pathway to generate high-value chemicals. We developed a methodology to perform electrocatalytic carboxylation without requiring sacrificial anodes. The key design principle involves adding a salt with an inorganic cation that can suppress nucleophilic side reactions, which lead …
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