Browsing Physics by Title
Now showing items 78-97 of 164
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Ion Traffic Across Cellular Membranes
(East Carolina University, 2010)The cell membrane protects the delicate internal machinery of the cell and hosts a complex transport system for ion exchange with the environment. Energy is continually expended to maintain a transmembrane electrical ... -
Kinetics of Germination of Individual Spores of as Measured by Raman Spectroscopy and Differential Interference Contrast Microscopy
(2013)Geobacillus stearothermophilus is a gram-positive, thermophilic bacterium, spores of which are very heat resistant. Raman spectroscopy and differential interference contrast microscopy were used to monitor the kinetics of ... -
Label-free classification of cultured cells through diffraction imaging
(2011-05)Automated classification of biological cells according to their 3D morphology is highly desired in a flow cytometer setting. We have investigated this possibility experimentally and numerically using a diffraction imaging ... -
Laser tweezers and Raman spectroscopy systems and methods for the study of microscopic particles
(2005-05-24)Methods and systems for studying microscopic particles are provided. An optical trap for a selected microscopic particle can be formed with a laser beam at a first power level. The laser beam can have a variable power level ... -
Levels of Ca2+-Dipicolinic Acid in Individual Bacillus Spores Determined Using Microfluidic Raman Tweezers
(East Carolina University, 2007-07)Pyridine-2,6-dicarboxylic acid (dipicolinic acid [DPA]) in a 1:1 chelate with calcium ion (Ca-DPA) comprises 5 to 15% of the dry weight of spores of Bacillus species. Ca-DPA is important in spore resistance to many ... -
Lèvy noise induced steady states
(East Carolina University, 2022-06-08)Systems far from equilibrium organize themselves to accommodate energy throughput. It is also in these nonequilibrium systems where noise has often been found to follow alpha-stable distributions, commonly called Lévy ... -
Lèvy noise induced steady states
(East Carolina University, 2022-06-08)Systems far from equilibrium organize themselves to accommodate energy throughput. It is also in these nonequilibrium systems where noise has often been found to follow alpha-stable distributions, commonly called Lèvy ... -
Localization of soniferous fish using a sparse hydrophone array and conventional steered response power method
(East Carolina University, 2019-12-10)A sparse seven-channel hydrophone array was deployed in intertidal marsh creeks located within the North-Inlet-Winyah-Bay Nature Reserve at Baruch Marine Field Laboratory in Hobcaw Barony, Georgetown, South Carolina, USA. ... -
Magnetic Control of NanoEL via Magneto-Mechanical Actuation: A proof of Concept for a Potential Nanotherapeutic Approach
(East Carolina University, 2023-05-03)Cancer treatment is one of the major health problems that burdens society. According to the latest publication of the American Cancer Society, the cancer mortality rate has reached 32% in 2022 in the US. To address these ... -
Mathematical Modeling of Oxygen Transport, Cell Killing and Cell Decision Making in Photodynamic Therapy of Cancer
(East Carolina University, 2012)In this study we present a model of in vitro cell killing through type II Photodynamic Therapy (PDT) for simulation of the molecular interactions leading to cell death in time domain in the presence of oxygen transport ... -
Memory of Germinant Stimuli in Bacterial Spores
(2015-11)Bacterial spores, despite being metabolically dormant, possess the remarkable capacity to detect nutrients and other molecules in their environment through a biochemical sensory apparatus that can trigger spore germination, ... -
Memory of Germinant Stimuli in Bacterial Spores
(2015-12-31) -
Methods and systems for optically characterizing a turbid material using a structured incident beam
(2010-04-08)Methods and systems for optically characterizing a turbid sample are provided. A structured light beam is impinged on the sample. The sample includes an embedded region. A reflected light image of the structured light beam ... -
MODIFICATION OF CELL SURVIVAL RATES BY CERIUM OXIDE NANOPARTICLES FOR EXPOSURE TO PROTON RADIATION
(East Carolina University, 2017-05-03)Radiation therapy is a well-established and widely used treatment for a variety of malignancies in the human body. Current radiotherapy methods most frequently use x-rays to deliver a lethal dose to tumors with sufficient ... -
Multi-wavelength beam splitting systems for simultaneous imaging of a distant object in two or more spectral channels using a single camera
(2016-09-29)An optical imaging system and related methods are provided that acquire images of an object at a distance in different spectral regions using only one camera. The systems and methods are adaptable to applications where ...