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 27 for “"field exposure"”.
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Pulse electric field exposure effect on morphological properties of HeLa cells
… with the investigation of pulsed electric field (PEF) towards biological cells. Biological cells selected in this study are HeLa (cervical cancer) cells. There are two parts of the study, which was involving modeling methods and experimental setup. Modeling method used involves analytical …
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60 Hz magnetic field exposure inhibits protein Kinase C dependent induction of Neuropeptide Y mRNA in PC-12 cells
The effects of MF exposure on the chemically induced production of NPY mRNA in the rat pheochromocytoma, PC-12 cell line.
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60 Hz magnetic field exposure inhibits protein Kinase C dependent induction of Neuropeptide Y mRNA in PC-12 cells
The effects of MF exposure on the chemically induced production of NPY mRNA in the rat pheochromocytoma, PC-12 cell line.
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An informatics approach to prioritizing risk assessment for chemicals and chemical combinations based on near-field exposure from consumer products
… consumer products, and known to have widespread exposure in the general population, have been screened. Toxicity screening is time-consuming, expensive, and complex because simultaneous or sequential exposure to multiple environmental stressors can affect chemical toxicity. Cumulative risk …
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The Effects of Exposure to Extremely Low-Amplitude, Low-Frequency Electric Fields on Skeletal Tissue, In Vitro
… to study the mechanism through which electric fields may increase bone formation, a model system was developed were bone cells or bone organ cultures were exposed to a capacitively-coupled electric field of low frequency (8-25 Hz) and extremely low amplitude (estimated 10<sup>-7</sup> V/cm in …
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Elf magnetic field influence on ION Channels studied by Patch Clamp Technique: exposure set up and "Whole Cell" measurements on Potassium currents
… low frequency (ELF) electromagnetic magnetic fields on potassium currents in neural cell lines ( Neuroblastoma SK-N-BE ), using the whole-cell Patch Clamp technique. Such technique is a sophisticated tool capable to investigate the electrophysiological activity at a single cell, and even at …
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The effects of pulsed static and oscillating magnetic fields on rat pineal serotonin N-acetyltransferase activity
… possible hazardous effects of electromagnetic fields (EMF ' s) has resulted in attempts to address this issue. Several authors have shown that EMF exposure affects biological systems and more specifically the pineal enzyme, serotonin N-acetyltransferase (SNAT), inhibiting the enzyme and thus …
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Factors influencing salt-induced weathering of building sandstone.
… that simulate wet/dry cycles based on field data from a representative Scottish environment. Additional studies involved exposure of samples to SO2 gas and water spray at acid pH. These studies aimed at understanding the effects of environmental factors (relative humidity, temperature, …
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An investigation of the durability of UK grown softwood distribution poles CCA-treated by sap-displacement
… was investigated using full size poles in a field site and representative pole sections in an accelerated decay system.<br/><br/>Analysis of cores removed from the field poles showed a significant difference in the treatability of the four wood species. While satisfactory uptake and …
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Characterization and modeling of the effect of environmental degradation on flexural strength of carbon/epoxy composites
… carbon-fiber/epoxy composite under hygrothermal exposure and applied tensile stress. The hygrothermal conditions capture the synergistic effects of field exposure and extreme temperatures, viz., hot/dry, hot/wet, cold/dry, and cold/wet. Short term tests were performed to determine the flexural …
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Recent lunar magnetism
… is a mystery because common sources of magnetic fields (e.g. core dynamo and long-lived impact plasma fields) have not been present within the last 1.5 Ga. To better characterize the source of magnetization in young lunar samples, we conducted paleomagnetic measurements on several subsamples of …
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Correlation of early leafspot disease in peanut with a weather- dependent infection index
… Florigiant' peanut (Arachis hypogaea L.) at two field sites in Suffolk, Virginia. In one study, plants in 27-cm-diameter plots were inoculated with 20,000 conidia and inoculation dates were replicated in five randomized complete blocks. At location one in 1985 and 1986, lesions/leaf at two weeks …
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Durability behavior of fiber reinforced polymer and steel reinforced polymer for infrastructure applications
… from concrete panels after seven plus years of field exposure and examine any microscopic damage to the GFRP fiber and/or matrix resin; 2. Durability of concrete elements reinforced with Steel Reinforced Polymer (SRP). The key purpose of this study is to assess the bond behavior of …
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Balanced antennas for mobile handset applications. Simulation and Measurement of Balanced Antennas for Mobile Handsets, investigating Specific Absorption Rate when operated near the human body, and a Coplanar Waveguide alternative to the Balanced Feed.
… studied experimentally by measuring antenna near field exposure. The measurement results are correlated with the calculated ones. A new dual-band balanced antenna using coplanar waveguide structure is also proposed, discussed and tested; this is intended to eliminate the balanced feed network. The …
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Entrained Air-Void System For Durable Highway Concrete
… of a drying period to better simulate actual field exposure conditions, 2- Functional modifications including introducing water through capillary suction and changing the freezing solution to incorporate deicing salts, 3- A combination of modification approaches including application of a …
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Thermal biology and establishment potential of two non-native candidate biological control agents, Nesidiocoris tenuis Reuter (Hemiptera: Miridae) and Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae), in the U.K.
… Europe. Through a series of laboratory and field assessments, this study investigates the establishment potential of these two species in cool temperate climates typical of northern Europe. Laboratory results demonstrated a low level of cold tolerance in \(N.\) \(tenuis\) with a …
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Improving the settleability of a metal sulphide suspension by the application of a magnetic field
… to the particle surface by applying a magnetic field. This results in the reduction of inter-particle electrostatic repulsive forces and subsequent increase in the zeta potential of a suspension. For the purposes of this study, a copper sulphide suspension was used. A T-mixer was used as the …
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The Chemical Durability of Elastomeric Bituminous Geomembranes (BGMS) in Different Geoenvironmental Applications at Elevated Temperatures
… and chemical properties of BGMs are examined. Exposure to elevated temperatures resulted in the thermo-oxidative degradation of the bituminous coat that increased its rigidity. Concurrently, the BGM exhibited degradation in the reinforcement layer resulting in the loss of its mechanical …
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Tyrosyl Protein Phosphorylation in Human Bone Cells : Its Potential Role in Mediating Fluoride Induced Osteoblast Proliferation
… and 96kD; IGF-II 220 and 96kD; electromagnetic field exposure 220 and 96kD), and c) Cells which did not respond to fluoride mitogenically were shown to have no significant fluoride-dependent changes in their levels of tyrosyl phosphorylation. With regards to the mechanism by which fluoride …
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