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 377 for “"Laboratory Studies"”.
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Numerical and Laboratory Studies of Ultrasonic Anderson Localization
… of Anderson localization in two dimensions and a laboratory study of weak localization in three dimensions are presented. The two-dimensional study was performed by mathematically modelling a system of masses connected to a rigid base by springs of random stiffness. The masses were connected …
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Field and laboratory studies of the mechanics of faulting
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.
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Laboratory Studies of Gas-Grain Processes on Cosmic Dust Analogues
… However, it has not been measured in the laboratory. In this thesis, this parameter is measured by using both an indirect and a direct method. The measured value agrees with model predictions based on astronomical observations. The formation of two oxygen-containing molecules, water and …
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Dissolved phosphorus removal in denitrifying bioreactors: field and laboratory studies
… being monitored showed more P removal than the laboratory batch tests (e.g., field sites averaged 55±163 mg P removed/kg with a median of 12 mg/kg; batch tests averaged 0.7±6.2 mg P removed/kg with a median of 0.6 mg/kg). Three of the full size bioreactors had woodchips that matched those used …
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Laboratory studies of atmospheric photochemistry in indoor and outdoor environments
… transport models. We represent historical laboratory experiments in a box model, enabling explicit estimates of the unmeasured RO2 and oxidant chemistry that influences aerosol formation. This work shows that reaction conditions are dynamic, changing within and between experiments, and …
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Laboratory studies using sodium-bearing waste simulant - ADL 26-94
The purposes of this study were to develop a chemical precipitation procedure that would treat the sodium bearing waste (SBW) and to determine if polymer addition could condition the resulting sludge. Chemical precipitation parameters such as impeller mixing speed, rate of base addition, amount of …
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Laboratory studies of the multiday oxidative aging of atmospheric organic aerosol
… atmosphere and their numerous reaction pathways. Laboratory experiments have generally focused on the initial formation of OA from volatile organic compounds (VOCs), but have neglected processes that can change the composition and loading of OA over longer timescales ("aging").
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Laboratory studies of ionospheric plasma processes with the Versatile Toroidal Facility (VTF)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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Field and laboratory studies of venezuelan equine encephalitis virus ecology in Chiapas, Mexico.
… was examined from a field approach and from a laboratory approach. This virus was not previously associated with equine disease in Mexico. The evolution of the equine virulent phenotype was thought to have resulted in a mosquito vector switch from Culex (Melanoconion) taeniopus to Aedes …
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Laboratory studies of chlorine activation reactions on ice using an aerosol flow reactor
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Studies of Arctic Tropospheric Ozone Depletion Events Through Buoy-Borne Observations and Laboratory Studies
<p>The photochemically-induced destruction of ground-level Arctic ozone in the Arctic occurs at the onset of spring, in concert with polar sunrise. Solar radiation is believed to stimulate a series of reactions that cause the production and release of molecular halogens from frozen, salty surfaces, …
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Laboratory studies on the feeding behaviour of juvenile Cape horse mackerel, Trachurus trachurus capensis
Laboratory studies were conducted on juvenile horse mackerel to examine feeding selectivity and rates of zooplankton consumption of two size classes of fish. Fish were fed a variety of natural zooplankton assemblages and sequential subsampling of water in the experimental tanks provided estimates …
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Prymnesium parvum effects on green algae, cladocerans and fish in field and laboratory studies.
… reduced D. magna survival and reproduction in laboratory and field studies, providing the first evidence of P. parvum impacts on cladocera. Nutrient treatment of N:P = 20 in the field decreased aquatic toxicity of P. parvum to cladocerans and fish. Whereas a potential relationship was observed …
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Numerical, field and laboratory studies of three-dimensional flow structures at river channel confluences
… of situations, difficult to obtain in either the laboratory or field. This thesis uses a three-dimensional numerical model, a relatively new tool in geomorphology, to investigate these questions. For example, a set of systematic experimental simulations in asymmetrical laboratory-style channels in …
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Laboratory studies on the spawning and the early life history of Pacific halibut (Hippoglossus stenolepis)
There is a growing interest in halibut research in many countries because of its market and scientific value. The first successful spawning of Pacific halibut in captivity in the United States was conducted during February and March, 1988, and eight larvae were produced in that spawning season. …
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