Magnetic Resonance Spectroscopy
Electrochemical impedance spectroscopy to assess vascular oxidative stress. (1/93)(+info)
A novel broadband impedance method for detection of cell-derived microparticles. (2/93)(+info)
Analysis of the willow root system by electrical impedance spectroscopy. (3/93)(+info)
Yersinia enterocolitica induces epithelial barrier dysfunction through regional tight junction changes in colonic HT-29/B6 cell monolayers. (4/93)(+info)
A preliminary evaluation of multi-probe resonance-frequency electrical impedance based measurements of the breast. (5/93)(+info)
Label-free electrochemical cocaine aptasensor based on a target-inducing aptamer switching conformation. (6/93)A novel label-free electrochemical nucleic acid aptasensor for the determination of cocaine by the immobilization of thiolated self-assembled DNA sequences on a gold nanoparticles-modified electrode is presented. When cocaine was complexed specifically to the aptamer, the configuration of the nucleic acid aptamer switched to a locked structure and the interface of the biosensor changed, resulting in a variation of the corresponding peak current of an electrochemical probe ([Fe(CN)(6)](3-/4-)). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were employed to characterize modifications of the electrode surface. The peak current was detected by differential pulse voltammetry (DPV). Under the optimized experimental conditions, the presented sensor exhibits a nice specificity towards cocaine. The decrease of the peak current response of the aptasensor has a linear relationship with the concentration of cocaine ranging from 1.0 x 10(-6) to 1.5 x 10(-4) mol L(-1) with a detection limit of 3 x 10(-7) mol L(-1) at 3sigma. The proposed aptasensor can be easily regenerated by the denaturalization of aptamer-target complexes in a heated water bath at 80-90 degrees C. Besides, this biosensor has a high reproducibility and selectivity, which can be a promising method to detect cocaine in real samples. (+info)
Investigating antibody interactions with a polar liquid using terahertz pulsed spectroscopy. (7/93)(+info)
Factors contributing to formation of edema in volume overloaded continuous ambulatory peritoneal dialysis patients. (8/93)(+info)
Dielectric spectroscopy is a type of material characterization technique that measures the dielectric properties of a material as a function of frequency. The dielectric property of a material refers to its ability to store electrical energy in the form of polarization when an external electric field is applied. In dielectric spectroscopy, the material's response to an alternating electric field is measured, and the resulting complex permittivity (which includes both real and imaginary components) is used to characterize the material's dielectric behavior.
The technique involves applying a small amplitude AC voltage to the material while measuring the current flow through it. The frequency of the applied voltage can be varied over a wide range, typically from millihertz to gigahertz. By analyzing the phase shift and amplitude of the resulting current, the complex permittivity of the material can be determined as a function of frequency.
Dielectric spectroscopy is widely used in materials science, physics, chemistry, and biology to study the structure, dynamics, and composition of various materials, including polymers, ceramics, glasses, colloids, and biological tissues. The technique can provide valuable information about the material's molecular mobility, relaxation processes, conductivity, and other dielectric properties, which can be used for quality control, process monitoring, and fundamental research.
I'm sorry for any confusion, but "spectrum analysis" is not a commonly used medical term. Spectrum analysis is a term that is more frequently used in the fields of physics, mathematics, and engineering to describe the process of breaking down a signal or a wave into its different frequencies and amplitudes, creating a visual representation called a spectrum.
If you have any concerns about a medical issue, I would recommend consulting with a healthcare professional for accurate information and guidance.
Medical definitions of water generally describe it as a colorless, odorless, tasteless liquid that is essential for all forms of life. It is a universal solvent, making it an excellent medium for transporting nutrients and waste products within the body. Water constitutes about 50-70% of an individual's body weight, depending on factors such as age, sex, and muscle mass.
In medical terms, water has several important functions in the human body:
1. Regulation of body temperature through perspiration and respiration.
2. Acting as a lubricant for joints and tissues.
3. Facilitating digestion by helping to break down food particles.
4. Transporting nutrients, oxygen, and waste products throughout the body.
5. Helping to maintain healthy skin and mucous membranes.
6. Assisting in the regulation of various bodily functions, such as blood pressure and heart rate.
Dehydration can occur when an individual does not consume enough water or loses too much fluid due to illness, exercise, or other factors. This can lead to a variety of symptoms, including dry mouth, fatigue, dizziness, and confusion. Severe dehydration can be life-threatening if left untreated.
Magnetic Resonance Spectroscopy (MRS) is a non-invasive diagnostic technique that provides information about the biochemical composition of tissues, including their metabolic state. It is often used in conjunction with Magnetic Resonance Imaging (MRI) to analyze various metabolites within body tissues, such as the brain, heart, liver, and muscles.
During MRS, a strong magnetic field, radio waves, and a computer are used to produce detailed images and data about the concentration of specific metabolites in the targeted tissue or organ. This technique can help detect abnormalities related to energy metabolism, neurotransmitter levels, pH balance, and other biochemical processes, which can be useful for diagnosing and monitoring various medical conditions, including cancer, neurological disorders, and metabolic diseases.
There are different types of MRS, such as Proton (^1^H) MRS, Phosphorus-31 (^31^P) MRS, and Carbon-13 (^13^C) MRS, each focusing on specific elements or metabolites within the body. The choice of MRS technique depends on the clinical question being addressed and the type of information needed for diagnosis or monitoring purposes.
Electrochemistry is a branch of chemistry that deals with the interconversion of electrical energy and chemical energy. It involves the study of chemical processes that cause electrons to move, resulting in the transfer of electrical charge, and the reverse processes by which electrical energy can be used to drive chemical reactions. This field encompasses various phenomena such as the generation of electricity from chemical sources (as in batteries), the electrolysis of substances, and corrosion. Electrochemical reactions are fundamental to many technologies, including energy storage and conversion, environmental protection, and medical diagnostics.
I'm sorry for any confusion, but "microwaves" is not a term typically used in medical definitions. Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; they are commonly used in communication devices and home appliances such as microwave ovens. If you have any questions related to health or medicine, please provide more context so I can give you a more accurate response.
Near-infrared spectroscopy (NIRS) is a non-invasive optical technique that uses the near-infrared region of the electromagnetic spectrum (approximately 700-2500 nanometers) to analyze various chemical and physical properties of materials, primarily in the fields of biomedical research and industry. In medicine, NIRS is often used to measure tissue oxygenation, hemodynamics, and metabolism, providing valuable information about organ function and physiology. This technique is based on the principle that different molecules absorb and scatter near-infrared light differently, allowing for the identification and quantification of specific chromophores, such as oxyhemoglobin, deoxyhemoglobin, and cytochrome c oxidase. NIRS can be employed in a variety of clinical settings, including monitoring cerebral or muscle oxygenation during surgery, assessing tissue viability in wound healing, and studying brain function in neuroscience research.
I'm sorry for any confusion, but static electricity is not a term that has a specific medical definition. Static electricity is an electrical charge that builds up on the surface of objects. This occurs when there is an imbalance of electric charges within or on the surface of a material. It can be caused by certain conditions, such as friction, which can build up an electric charge.
While not a medical term, static electricity can have various effects in different settings, including medical ones. For instance, it can cause issues with electronic equipment used in healthcare settings. Additionally, some people may experience a shock or spark when they touch a conductive object that has been charged with static electricity. However, these occurrences are not typically considered medical conditions or issues.
John H. Miller Jr.
David C. Watts
Blood glucose monitoring
Terahertz spectroscopy and technology
Perrin friction factors
Electromagnetic absorption by water
Rotational correlation time
Thermally stimulated current spectroscopy
Electric dipole moment
Dielectric spectroscopy - Wikipedia
Broadband Dielectric Spectroscopy with a Microwave Ablation Antenna - TUprints
An investigation of dielectric barrier discharge in Ar and Ar/NH3 mixture using cross-correlation spectroscopy | Masarykova...
Laboratory of Dielectric Spectroscopy
Nonlinear dielectric spectroscopy of live cells using superconducting quantum interference devices | Applied Physics Letters |...
Alignment and relaxation dynamics of dye molecules in host-guest inclusion compounds as probed by dielectric spectroscopy
Analyses of various insulating polymers by broadband dielectric spectroscopy<...
Dielectric spectroscopy of diglycidyl ether of bisphenol-A at glass transition temperature
Dielectric Spectroscopy | Zurich Instruments
Hybrid dielectric waveguide spectroscopy of individual plasmonic nanoparticles
Genetic programming as an analytical tool for non-linear dielectric spectroscopy
Electronic excitations and the calculation of dielectric functions | Theoretical Spectroscopy Group
Highly sensitive characterization of glucose aqueous solution with low concentration: Application to broadband dielectric...
Label Free Detection Market Size, Share and Trends | Forecast By 2026
High Voltage and Insulation Materials Laboratory | KTH
Dynamics of Advanced Polymer Systems studied by Dielectric Spectroscopy and Rheology: From Binary Glass Formers to...
The dielectric spectroscopy of human red blood cells: The differentiation of old from fresh cells - Fingerprint - The...
Dielectric spectroscopy and application of mixing models describing dielectric dispersion in clay minerals and clayey soils |...
2019, Thesis, Fabrication, characterization and dielectric spectroscopy of BaTiO₃-styrene butadiene styrene stretchable thin...
Monitoring real-time enzymatic hydrolysis of Distillers Dried Grains with Soluble (DDGS) by dielectric spectroscopy following...
Water's Quantum Jazz - Dancing with Macromolecules
Broadband Dielectric Spectroscopic Detection of Ethanol: A Side-by-Side Comparison of ZnO and HKUST-1 MOFs as Sensing Media |...
Landscape of Charge Carrier Transport in Doped Poly(3-hexylthiophene): Noncontact Approach Using Ternary Combined Dielectric,...
Alumni of the Department of Physical Chemistry II - Universität Regensburg
Controlling dynamics in extended molecular frameworks | Nature Reviews Chemistry
"Optical emission spectroscopy of high voltage cold atmospheric plasma " by Russell Scott Brayfield
Søren Højgaard Jensen - Aalborg University's Research Portal
Santoro, Gonzalo | DIGITAL.CSIC
APS -2009 APS March Meeting - Session Index MAR09
Broadband Dielectric Spectroscopy4
- We used broadband dielectric spectroscopy in the frequency range from 10 -2 Hz up to 10 7 Hz and we found dynamics of the primary (- and intermolecular Johari-Goldstein (JG) (-processes are strongly correlated in diglycidyl ether of bisphenol-A over a wide temperature from 193 to 283K and pressure P range from 0.1 to 600 MPa. (scirp.org)
- Depolarized dynamic light scattering, broadband dielectric spectroscopy, rheology, and differential scanning calorimetry were employed to systematically study the influence of MW on the mechanism of ionic transport and segmental dynamics in these materials. (osti.gov)
- Slow motion of confined molecules: NMR and broadband dielectric spectroscopy investigations. (mpg.de)
- A series of alternating maleimide (MI) copolymers with fluorinated side chains have been investigated using broadband dielectric spectroscopy. (ipfdd.de)
- Dielectric spectroscopy (which falls in a subcategory of impedance spectroscopy) measures the dielectric properties of a medium as a function of frequency. (wikipedia.org)
- Often, data obtained by electrochemical impedance spectroscopy (EIS) is expressed graphically in a Bode plot or a Nyquist plot. (wikipedia.org)
- Dielectric spectroscopy is a form of impedance spectroscopy where the dielectric properties (dielectric constant and dissipation factor) of a medium or sample are characterized as a function of frequency. (zhinst.cn)
- Analysis of the ionic and dielectric properties of perovskites by impedance spectroscopy. (mpg.de)
- This paper presents an alternative method for glucose monitoring which is based on electrical impedance spectroscopy. (bvsalud.org)
- OBJECTIVE: To assess whether electrical impedance spectroscopy (EIS) as an adjunctive technology enhances the performance of colposcopy. (bvsalud.org)
- The electrochemical properties of the biosensor were characterized by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). (bvsalud.org)
Measures the dielectric1
- Dielectric spectroscopy measures the dielectric response of a sample to an external electromagnetic field applied over a range of frequencies. (i-sis.org.uk)
- Together with single-molecule spectroscopy and scanning electron microscope, we studied the polarization property of individual MAPbBr3 aggregates, which shows the well-known dielectric screening effect cannot fully explain the absorption polarization from weakly elongated objects (even with irregular shapes). (lu.se)
- With this Dynamics workshop, our goal is to bring together leading experts in the field of membrane dynamics, with a particular focus on neutrons and X-rays, but also complementary techniques including NMR, single molecule spectroscopy and computer modeling. (lu.se)
- In general, dielectric mechanisms can be divided into relaxation and resonance processes. (wikipedia.org)
- Dielectric relaxation as a whole is the result of the movement of dipoles (dipole relaxation) and electric charges (ionic relaxation) due to an applied alternating field, and is usually observed in the frequency range 102-1010 Hz. (wikipedia.org)
- The alignment and relaxation dynamics of a polar dye molecule, N,N-dimethyl-4(4-nitrophenylazo)aniline (DNAA), in zeolite L and perhydrotriphenylene (PHTP) channels were investigated by means of a combination of optical, dielectric, and quantum-chemical methods. (unimi.it)
- Dielectric Relaxation Spectroscopy allows us to probe the relaxation dynamics of polymer systems. (tufts.edu)
- Overhauser effect spectroscopy, dielectric relaxation and fluorescence spectroscopy. (lu.se)
- For this purpose we employ the combination of experimental techniques in real and reciprocal spaces, including grazing incidence X-ray scattering and fluorescence, off-specular neutron scattering, flicker spectroscopy, etc. (lu.se)
- C equivalent circuit models can be established, and the dielectric constant (permittivity) is extracted as a result. (zhinst.cn)
- The dielectric property of a material is expressed in a complex number known as permittivity. (i-sis.org.uk)
- The real part of permittivity measures the energy stored, the imaginary part measures the energy loss and is called the dielectric loss. (i-sis.org.uk)
- In order to respond to such a trend, dielectric properties of insulating polymers at high frequencies have to be clarified, although the importance of clarifying low-frequency properties is still very high, especially for use as high voltage insulators. (elsevierpure.com)
- Similar behaviour was found for confined water in various biological and non-biological environments, and a range of 18 solutions including low molecular weight organic glass formers, polymers, sugars as well as protein and DNA probed with broad band dielectric spectroscopy (see Box) between 10 -2 and 10 7 Hz . (i-sis.org.uk)
- In this thesis, the dynamics of molecular as well as polymeric glass formers is investigated by measuring their dielectric (DS) and rheological response. (uni-bayreuth.de)
- On the basis of technology, the market is segmented into cellular dielectric spectroscopy, bio-layer interferometry, surface plasmon resonance, optical waveguide grating technology and others. (alliedmarketresearch.com)
- Because the design of the ablation antenna and the success of the treatment greatly depend on the accurate knowledge of the dielectric properties of the tissue being treated, it is highly valuable to have a microwave ablation antenna that is also able to perform in-situ dielectric spectroscopy. (tu-darmstadt.de)
- Finally, the results of this paper clarify to which extent the antenna can be used to measure dielectric properties and paves the way to future improvements and the introduction of this functionality into microwave thermal ablation treatments. (tu-darmstadt.de)
- The temporal evolution of the iodine doping process of poly(3-hexylthiophene) (P3HT) was monitored directly through electron paramagnetic resonance (EPR) and optical absorption spectroscopy, as well as differential electrical conductivity by the microwave conductivity measurement. (elsevierpure.com)
- This paper reviews non-invasive blood glucose measurements via dielectric spectroscopy at microwave frequencies presented in the literature. (mdpi.com)
- Detailed appendices provide additional information on subjects as diverse as crystallography, spectroscopy, thermochemical data, analytical chemistry, corrosion resistance, and economic data for industrial and hazardous materials. (lu.se)
- Numerical simulations were performed to investigate the functionality of the floating sleeve of the antenna and to find the optimal de-embedding model and calibration option for obtaining accurate dielectric properties of the area of interest. (tu-darmstadt.de)
- Results show that, as in the case of the open-ended coaxial probe, the accuracy of the measurement greatly depends on the likeness between the calibration standards' dielectric properties and the material under test. (tu-darmstadt.de)
- To study the temporal evolution of the dielectric properties, it is possible to take advantage of the LabOne Plotter (see Figure 3) or Data Acquisition (DAQ) modules to carry out measurements in the time domain. (zhinst.cn)
- In this paper we present the investigation results on the dielectric properties of glucose aqueous solutions over a large frequency band spanning from 2 to 18 GHz. (univ-lille.fr)
- His research focused on fundamental and applied investigations of the piezoelectric, ferroelectric, and dielectric properties of a wide range of materials. (epfl.ch)
- Dielectric barrier discharges (BDs) are known to operate in two distinctive modes. (muni.cz)
- Here, we show how by using a grating coupler and a low NA objective, quantitative spectroscopic information similar to standard dark-field spectroscopy can be obtained at the single-nanoparticle level. (chalmers.se)
- abstract = "By modelling the non-linear effects of membranous enzymes on an applied oscillating electromagnetic field using supervised multivariate analysis methods, Non-Linear Dielectric Spectroscopy (NLDS) has previously been shown to produce quantitative information that is indicative of the metabolic state of various organisms. (ucl.ac.uk)
- Association Equilibria of Organo-Phosphoric Acids with Imines from a Combined Dielectric and Nuclear Magnetic Resonance Spectroscopy Approach. (mpg.de)
- As the crystal phase of NWs can be precisely and reliably tailored, our findings open up for new semiconductor optoelectronics with controllable nanoscale emission of electrons through vacuum or dielectric barriers. (lu.se)
- An impedance study of dielectrics is needed to fully understand the material physics as well as to optimize device performance. (zhinst.cn)
- Blood serum samples were analyzed for PCB congeners using gas chromatography/mass spectroscopy (GC/MS). Results were reported as concentrations of individual PCB congeners per unit volume of blood serum, and also as lipid-based concentrations. (cdc.gov)
- Materials or systems exhibiting multiple phases (such as composites or heterogeneous materials) commonly show a universal dielectric response, whereby dielectric spectroscopy reveals a power law relationship between the impedance (or the inverse term, admittance) and the frequency, ω, of the applied AC field. (wikipedia.org)
- The charges may be separated by a considerable distance and therefore make contributions to the dielectric loss that are orders of magnitude larger than the response due to molecular fluctuations. (wikipedia.org)
- A related effect is Maxwell-Wagner-Sillars polarization, where charge carriers blocked at inner dielectric boundary layers (on the mesoscopic scale) or external electrodes (on a macroscopic scale) lead to a separation of charges. (wikipedia.org)
Investigated by means1
- The discharges were investigated by means of cross-correlation spectroscopy. (muni.cz)