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 87 for “"Biological cells"”.
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Phase derivative microscopy of biological cells and tissues
… and therefore, it is suitable for studying live biological samples. This thesis introduces the principle of PDM, the setup, and also applications of PDM, including high contrast imaging, live cell dynamics study, and unstained tissue biopsies.
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Signal processing in biological cells : proteins, networks, and models
… of abstraction the information processing in biological cells in order to understand the algorithms implemented by the signaling pathways that perform the processing. An example of how to emulate one of these algorithms in other signal processing contexts is also presented. At a high modeling …
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Dielectrophoresis study of electroporation effects on dielectric properties of biological cells
… affects the dielectric properties of cells. Dielectric measurement techniques can provide a label-free and non-invasive modality to study this phenomenon. In this thesis we introduce a dielectrophoresis (DEP) based technique to study changes in the cytoplasm conductivity of single …
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An opto-fluidic architecture for image-based sorting of biological cells and particles
… options for viably sorting and capturing biological cells based on visual information. This thesis presents a novel opto-fluidic architecture which enables potentially viable image-based cell sorting. The architecture combines a trivially-fabricated microfluidic device with a laser and …
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Digital Holographic Micro-Interferometery for the Measurement of the Refractive Index of Biological Cells
… can be used to measure the refractive index of biological cells at different wavelengths that extend to the near-infrared spectrum was built. The interference pattern produced by the reference and object beams was recorded by a CCD camera. The recording process followed a special procedure …
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Brownian motion of macromolecules inside single intact biological cells : microscope laser light scattering spectroscopy
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1986.
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A Computational Study of The Electrical Response of Biological Cells with Realistic Three-Dimensional Morphologies
One of the unique features of a biological cell is the cell membrane that protects the cell interior by establishing a physical barrier between the cytoplasm and the extracellular matrix and governs the distribution of the cytoskeleton to control the three-dimensional (3D) morphology of a cell. …
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Thermodynamics and kinetics of ice nucleation inside biological cells during freezing : as applied to mouse oocytes
Thesis (Ph. D.)--Harvard University--Massachusetts Institute of Technology Division of Health Sciences and Technology, Program in Medical Engineering and Medical Physics, 1989.
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Microstructurally-based constitutive models of cytoskeletal networks for simulation of the biomechanical response of biological cells
The elastic and viscoelastic stress-strain behavior of cytoskeletal networks, important to many cellular functions, is modeled via a microstructurally-informed continuum mechanics approach. The force-extension behavior of the individual filaments is captured with a new analytical expression of the …
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Dynamic Electrical Responses of Biological Cells and Tissue to Low- and High-Frequency Irreversible Electroporation Waveforms
… tissue leading to loss of homeostasis among the cells in the treatment zone. Predicting these treatments is challenging as the electric field (EF) induced through the electrode configuration is heterogeneous and is affected by several adjustable parameters. Computational treatment planning models …
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Resolving bacteria with the coulter counter
… in the electronic particle method of counting biological cells; among these are the biological cells, diluent, and electronic circuitry. Apparently the variability in the electronic circuitry caused the calibration of laboratory orifices to be impossible according to conventional methods.
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Computation of electromagnetic fields in assemblages of biological cells using a modified finite difference time domain scheme. Computational electromagnetic methods using quasi-static approximate version of FDTD, modified Berenger absorbing boundary and Floquet periodic boundary conditions to investigate the phenomena in the interaction between EM fields and biological systems.
… the electrical behaviour of individual biological cells exposed to electromagnetic fields. In this area of solving linear problem, the most frequently used technique for computing the EM field is the Finite-Difference Time-Domain (FDTD) method. When modelling objects that are small …
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A computer model for investigating the biomechanical effects of radiation exposure on pathological and non-pathological living human cells
… 500nm due to the strain hardening effect for biological cells and that the biological cells non-linear force response becomes marked after the 500nm region. The orientation of actin was investigated and a bimodal variation was statistical significant, although the larger tendency was for a 90 …
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Form from within : scaling up self-constructing biological architectures through a novel application of synthetic morphogenesis
… (ASSEMBLE), that brings about self-constructing biological structures at the architectural scale by merging scientists' newly developing ability to control the morphogenetic power of living matter with architects' and builders' discrete assembly method, which they have used for centuries to scale …
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Low Reynolds number biohybrid swimming
… are a new class of mechanical systems which use biological cells as machine components in microscale to mesoscale actuators and motile structures. Eukaryotic cells come pre-programmed to accomplish a wide range of functionalities, from sensing environmental factors to providing contractile …
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Maskless photopatterning of cells in microfluidic devices/
… methods for printing and patterning of live biological cells, there is a need for a method capable of printing with the resolution of single biological cells to organize them into complex structures. In order to fill this need, building upon previous design of a dynamic lithography system, a …
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Parameter Estimation in Biological Cell Cycle Models Using Deterministic Optimization
… the accuracy of the models in representing real biological cells. Typically people search for the best parameters to these models using computers only as tools to run simulations. In this thesis methods and results are described for a computer program that searches for parameters to a series of …
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Using Fluorescent Probes to Study the Location and Interaction of Disaccharides within Lipid Bilayers
… in order to help aid in the preservation of biological cells. Researchers have attempted to replicate this phenomenon in vitro through a freeze-drying technique known as lyopreservation and have shown trehalose to be an effective lyoprotecting agent. However, lyopreservation is very …
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Pulse electric field exposure effect on morphological properties of HeLa cells
… 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 (MATLAB) and …
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Development of light actuated chemical delivery platform on a 2-D array of micropore structure
… in the fundamental information transfers within biological systems. Thus, the ability to mimic the natural chemical signal modulation would provide significant contributions to understand the functional signaling pathway of biological cells and develop new prosthetic devices for neurological …
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