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.
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Showing 1 to 20 of 78 for “"hygroscopic"”.
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Inducing Liquid Evaporation with Hygroscopic Gels
… current study presents a novel aluminum-free the hygroscopic gel which can potentially serve as an antiperspirant. A synthetic sweat duct has been developed to mimic the sweating behavior of humans and to test the synthesized gels. Hygroscopic materials readily absorb and/or adsorb water from a …
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Exergetic and Thermoeconomic Analysis of The Hygroscopic Cycle
En esta tesis, tras realizar una revisión exhaustiva de los desafíos, perspectivas e impactos del sector de generación eléctrica y los ciclos de potencia existentes, se presentan las principales características del Ciclo Higroscópico (HC). A continuación, una serie de pruebas experimentales a …
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Engineering tough, hygroscopic, and active hydrogels for surgical simulation and anti-biofouling
… glycerol within the gel network, leading to a hygroscopic material that draws humidity from the surrounding ambient air. Both of these properties of toughness and non-drying are combined in Chapter 4 to demonstrate the 3D printing of suturable organ mimics for preoperative planning and surgical …
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Method for investigating the hygroscopic and optical character of organic carbon in atmospheric aerosols
The hygroscopic and optical characteristics of organic carbon aerosols impact the radiative energy balance of the atmosphere, and therefore Earth’s climate. This thesis discusses the development of a method to fractionate organic carbon according to climate-relevant properties. Ion-exchange High …
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A water and greenhouse gas inventory for hygroscopic and conventional evaporative building-scale cooling systems
… a conventional wet-cooling HVAC tower to a novel hygroscopic system. Greenhouse gas emissions (GHG) were quantified for direct electricity consumption and the energy associated with water and wastewater conveyance and treatment using power plant and cooling system data, municipal water treatment …
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Modeling study of the hygroscopic, optical, and cloud-activation properties of aerosols from biofuel combustion
… on the size distribution, mixing state, hygroscopicity, optical properties, CCN activity, and total quantity of aerosols emitted from biofuel combustion. The change in cloud characteristics due to biofuel burning aerosols is uncertain, in part, due to the uncertainty in the added number …
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Hygroscopic growth and cloud condensation nuclei activity of fresh and chemically-aged biomass-pyrolyzed organic aerosol
… organic carbon (OC) particles to determine its hygroscopic growth at sub-saturated relative humidities (RH) as well as CCN activity and droplet sizes at super-saturated humidity. This thesis investigates changes in these properties upon controlled, atmospherically-relevant exposures of NH3, O3 …
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Laboratory experiments on warm fog dissipation.
… recent results of studies involving the use of hygroscopic materials and ionic surfactants as warm fog dispersants are covered in a brief survey of the literature. The fog chamber, equipment and experimental procedures used in this study are described in detail. Seeding agents utilized during …
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Parameterizing Climate-Relevant Properties of Biofuel and Biomass Particulate Emissions Based on Combustion Conditions
… Soot from wood combustion did not display any hygroscopic growth directly after generation or when aged for 24 hours with direct co-pollutants. Wood burning soot did display some hygroscopic growth when mixed with a larger mass fraction of hygroscopic smoldering emissions; however the mixture's …
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Atmospheric organic aerosol - water interactions
… same does not stand for the organic components. Hygroscopic water soluble organic material can enhance the water absorption of the particles, affecting their climate forcing. This dissertation explores the hygroscopic properties of atmospheric organic aerosol, the first part of the thesis is …
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Mechanisms of convective drying in thick beds of solids
… The experimental work covered thick beds of hygroscopic and non-hygroscopic materials (glass beads of different diameters, polystyrene pellets, activated alumina and wood powder) at air temperatures of 54°C to 84°C. Tests were carried out in a laboratory drying apparatus comprising a wind …
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Numerical modeling of the early stage of cloud formation in a simulation chamber
… droplets by condensation upon a spectrum of hygroscopic nuclei. The model is applicable to cloud simulation chamber conditions as well as to the study of the role of these nuclei on cloud base microstructure.</p> <p>Equations are given for the growth by condensation of water vapor on a …
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Geraniaceae seed-inspired soft robots for environmental actuation and sensing
… soft robots, ingeniously engineered for hygroscopic actuation and sensing. Through a mutually beneficial fusion of form and function, these artificial structures emulate the awe-inspiring mechanisms of seed dispersal. Delving deeper into the domain of soft robotics, this research unfolds …
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An experimental and theoretical investigation of the migration of moisture in cocoa beans
… as the result of a temperature gradient in hygroscopic porous materials, in particular, cocoa beans. The aim of the research has been to determine experimentally the bulk moisture diffusion coefficient for cocoa, and, by quantifying it, to investigate the contribution of such diffusion to …
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Aerosol Optical Properties and the Influence of Particulate Organic Matter
… (i.e., glutaric and succinic acids) decrease the hygroscopic growth of aerosol particles when compared with aerosol particles composed of pure inorganic compounds (i.e., sodium chloride and ammonium sulfate) and that increasing the mass ratio of these organic species results in a reduction in the …
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An investigation of the stickinness mechanism and the role of nodes in cribellar spider capture thread
… equations describing van der Waals and hygroscopic forces can predict the observed stickiness of these threads. This model supports the hypothesis that van der Waals forces allow non-noded cribellar fibrils to adhere to smooth surfaces, whereas noded fibrils employ van der Waals forces …
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Arctic Aerosol Sources and Continental Organic Aerosol Hygroscopicity
… issue: the sources of Arctic aerosol and the hygroscopicity of continental organic aerosol. Small particles were observed in Baffin Bay during September 2008 that coincided with high atmospheric and ocean surface dimethyl sulphide (DMS) concentrations suggesting that the aerosol formed from …
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Vulvo-vaginitis due to Neisser's diplococcus : a treatise on the above subject with special reference to treatment, based on a series of cases numbering approximately one hundred, at the Edinburgh V.D. Clinic from 1927-1933
… or replacement of the glycerine - since it is hygroscopic - by 20 parts of alcohol, and therefore 80 parts of water, would in all probability be equally satisfactory. Furthermore, this form of treatment should be persevered with. And finally, if the results were a little disappointing, the …
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