Dielectric studies on the reaction of the intracellular matter of fish red blood cells to detergent toxicity.

Abstract:

:Results from dielectric studies on the freshwater fish Cyprinus carpio exposed to a sublethal concentration of sodium alkyl benzene sulphonate were compared with those from untreated control fish; recovery from the test solution was also checked. The influence of the anionic detergent on the intracellular matter of fish red blood cells was investigated by measurement of electrical conductivity and permittivity using a method that did not harm the cell membrane. The results were compared with a calculation using Wagner's and Hanai 's equation. It has been found that electrical conductivity and permittivity increase with time of exposure to detergent and the results indicate an almost linear relationship. The dielectric data, however, reveal anomalous behaviour for both conductivity and permittivity on the 16th and 30th, and 12th and 30th days, respectively. This may be associated with a structural change in the red blood cells.

journal_name

Phys Med Biol

authors

Bielinska I,Terlecki J

doi

10.1088/0031-9155/29/5/005

subject

Has Abstract

pub_date

1984-05-01 00:00:00

pages

525-34

issue

5

eissn

0031-9155

issn

1361-6560

journal_volume

29

pub_type

杂志文章
  • Accelerated time-of-flight (TOF) PET image reconstruction using TOF bin subsetization and TOF weighting matrix pre-computation.

    abstract::Time-of-flight (TOF) positron emission tomography (PET) technology has recently regained popularity in clinical PET studies for improving image quality and lesion detectability. Using TOF information, the spatial location of annihilation events is confined to a number of image voxels along each line of response, there...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/61/3/1309

    authors: Mehranian A,Kotasidis F,Zaidi H

    更新日期:2016-02-07 00:00:00

  • Automatic classification of DMSA scans using an artificial neural network.

    abstract::DMSA imaging is carried out in nuclear medicine to assess the level of functional renal tissue in patients. This study investigated the use of an artificial neural network to perform diagnostic classification of these scans. Using the radiological report as the gold standard, the network was trained to classify DMSA s...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/59/7/1789

    authors: Wright JW,Duguid R,McKiddie F,Staff RT

    更新日期:2014-04-07 00:00:00

  • THz time domain spectroscopy of biomolecular conformational modes.

    abstract::We discuss the use of terahertz time domain spectroscopy for studies of conformational flexibility and conformational change in biomolecules. Protein structural dynamics are vital to biological function with protein flexibility affecting enzymatic reaction rates and sensory transduction cycling times. Conformational m...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/47/21/318

    authors: Markelz A,Whitmire S,Hillebrecht J,Birge R

    更新日期:2002-11-07 00:00:00

  • Dead time correction and counting statistics for positron tomography.

    abstract::A correction for loss of events due to dead time in dynamic positron emission tomography (PET) is presented. The model employs a paralysing dead time to describe the behaviour of a tomograph over the range of event rates normally encountered in patient studies (up to 200 000 events/s per detector layer). The Donner 28...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/30/5/002

    authors: Mazoyer BM,Roos MS,Huesman RH

    更新日期:1985-05-01 00:00:00

  • Recent experimental results on W-values for heavy particles.

    abstract::The total ionisation produced by ions stopped in nitrogen, methane and carbon dioxide has been measured in the energy range 25-375 keV using a chamber described previously. The chamber was operated alternately as a proportional counter and as an ionisation chamber to measure respectively the particle rate and the tota...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/25/3/010

    authors: Nguyen VD,Chemtob M,Chary J,Posny F,Parmentier N

    更新日期:1980-05-01 00:00:00

  • Optimization of the accuracy of retention and washout measurements of 99mTc-Sestamibi from breast tumours using an anthropomorphic phantom.

    abstract::Quantifying the retention or washout of (99m)Tc-Sestamibi (MIBI) in breast tumours in vivo may provide a basis for predicting the chemotherapy response. The aim of this study is to investigate the variations and limitations of the different methods used to quantify these parameters. A phantom was developed that allowe...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/50/9/013

    authors: Marshall C,Griffiths PA

    更新日期:2005-05-07 00:00:00

  • Quantitative evaluation of myocardial function by a volume-normalized map generated from relative blood flow.

    abstract::Our study aimed to quantitatively evaluate blood flow in the left ventricle (LV) of apical hypertrophic cardiomyopathy (APH) by combining wall thickness obtained from cardiac magnetic resonance imaging (MRI) and myocardial perfusion from single-photon emission computed tomography (SPECT). In this study, we considered ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/52/14/019

    authors: Fukami T,Sato H,Wu J,Lwin TT,Yuasa T,Kawano S,Iida K,Akatsuka T,Hontani H,Takeda T,Tamura M,Yokota H

    更新日期:2007-07-21 00:00:00

  • Thoracic low-dose CT image processing using an artifact suppressed large-scale nonlocal means.

    abstract::The x-ray exposure to patients has become a major concern in computed tomography (CT) and minimizing the radiation exposure has been one of the major efforts in the CT field. Due to plenty high-attenuation tissues in the human chest, under low-dose scan protocols, thoracic low-dose CT (LDCT) images tend to be severely...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/57/9/2667

    authors: Chen Y,Yang Z,Hu Y,Yang G,Zhu Y,Li Y,Luo L,Chen W,Toumoulin C

    更新日期:2012-05-07 00:00:00

  • An exponential growth of computational phantom research in radiation protection, imaging, and radiotherapy: a review of the fifty-year history.

    abstract::Radiation dose calculation using models of the human anatomy has been a subject of great interest to radiation protection, medical imaging, and radiotherapy. However, early pioneers of this field did not foresee the exponential growth of research activity as observed today. This review article walks the reader through...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章,评审

    doi:10.1088/0031-9155/59/18/R233

    authors: Xu XG

    更新日期:2014-09-21 00:00:00

  • Image reconstruction.

    abstract::We give an overview of the role of Physics in Medicine and Biology in the development of tomographic reconstruction algorithms. We focus on imaging modalities involving ionizing radiation, CT, PET and SPECT, and cover a wide spectrum of reconstruction problems, starting with classical 2D tomography in the 1970s up to ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章,评审

    doi:10.1088/0031-9155/51/13/R09

    authors: Defrise M,Gullberg GT

    更新日期:2006-07-07 00:00:00

  • In vivo and in vitro dielectric properties of feline tissues at low radiofrequencies.

    abstract::The dielectric constant and conductivity of muscle, liver, spleen and kidney of cats in vivo and in situ immediately following the animal's death were measured at frequencies from 10 kHz to 100 MHz. A novel multi-ring capacitive sensor and a computer-controlled automatic network analyser (ANA) were employed. The resul...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/31/8/007

    authors: Surowiec A,Stuchly SS,Keaney M,Swarup A

    更新日期:1986-08-01 00:00:00

  • Beam characterisation of the 1.5 T MRI-linac.

    abstract::As a prerequisite for clinical treatments it was necessary to characterize the Elekta 1.5 T MRI-linac 7 MV FFF radiation beam. Following acceptance testing, beam characterization data were acquired with Semiflex 3D (PTW 31021), microDiamond (PTW 60019), and Farmer-type (PTW 30013 and IBA FC65-G) detectors in an Elekta...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/1361-6560/aab566

    authors: Woodings SJ,Bluemink JJ,de Vries JHW,Niatsetski Y,van Veelen B,Schillings J,Kok JGM,Wolthaus JWH,Hackett SL,van Asselen B,van Zijp HM,Pencea S,Roberts DA,Lagendijk JJW,Raaymakers BW

    更新日期:2018-04-19 00:00:00

  • The validation of tomotherapy dose calculations in low-density lung media.

    abstract::The dose-calculation accuracy of the tomotherapy Hi-Art II(R) (Tomotherapy, Inc., Madison, WI) treatment planning system (TPS) in the presence of low-density lung media was investigated. In this evaluation, a custom-designed heterogeneous phantom mimicking the mediastinum geometry was used. Gammex LN300 and balsa wood...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/54/8/004

    authors: Chaudhari SR,Pechenaya OL,Goddu SM,Mutic S,Rangaraj D,Bradley JD,Low D

    更新日期:2009-04-21 00:00:00

  • Reduction of scatter in breast CT yields improved microcalcification visibility.

    abstract::The inadequate visibility of microcalcifications-small calcium deposits that cue radiologists to early stages of cancer-is a major limitation in current designs of dedicated breast computed tomography (bCT). This limitation has previously been attributed to the constituent components, spatial resolution, and utilized ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/1361-6560/abae07

    authors: Ghazi P

    更新日期:2020-12-04 00:00:00

  • Measurement of patient entrance surface dose rates for fluoroscopic x-ray units.

    abstract::Measurements of patient entrance surface dose rate provide valuable data for interpreting results from dose-area product studies on fluoroscopic x-ray equipment. Methods for measurement of entrance surface dose rate with backscatter and incident dose rate without backscatter have been investigated. Entrance surface do...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/40/5/008

    authors: Martin CJ

    更新日期:1995-05-01 00:00:00

  • Structural and practical identifiability of dual-input kinetic modeling in dynamic PET of liver inflammation.

    abstract::Dynamic 18F-FDG PET with tracer kinetic modeling has the potential to noninvasively evaluate human liver inflammation using the FDG blood-to-tissue transport rate K 1. Accurate kinetic modeling of dynamic liver PET data and K 1 quantification requires the knowledge of dual-blood input function from the hepatic artery ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/1361-6560/ab1f29

    authors: Zuo Y,Sarkar S,Corwin MT,Olson K,Badawi RD,Wang G

    更新日期:2019-09-05 00:00:00

  • Out-of-field doses from pediatric craniospinal irradiations using 3D-CRT, IMRT, helical tomotherapy and electron-based therapy.

    abstract::Medulloblastoma treatment involves irradiation of the entire central nervous system, i.e. craniospinal irradiation (CSI). This is associated with the significant exposure of large volumes of healthy tissue and there is growing concern regarding treatment-associated side effects. The current study compares out-of-field...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/1361-6560/aa6c9e

    authors: De Saint-Hubert M,Verellen D,Poels K,Crijns W,Magliona F,Depuydt T,Vanhavere F,Struelens L

    更新日期:2017-07-07 00:00:00

  • Improved procedure for neuromagnetic localisation.

    abstract::We describe an improved algorithm for localising equivalent sources of biomagnetic fields in the human brain. The algorithm is an improvement over the sphere model in that it considers two distinct surfaces: an ellipsoid, to model the region of the skull on which the sensors are placed, and a sphere as the medium in w...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/32/1/017

    authors: Pistella F,Barone P,Narici L,Ocello N,Pizzella V,Romani GL

    更新日期:1987-01-01 00:00:00

  • A quantitative assessment of the depth sensitivity of an optical topography system using a solid dynamic tissue-phantom.

    abstract::A solid dynamic phantom with tissue-like optical properties is presented, which contains seven discrete targets impregnated with thermochromic pigment located at different depths from the surface. Changes in absorption are obtained in response to localized heating of the targets, simulating haemodynamic changes occurr...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/54/20/016

    authors: Correia T,Banga A,Everdell NL,Gibson AP,Hebden JC

    更新日期:2009-10-21 00:00:00

  • Microdosimetric investigations on collimated fast neutron beams for radiation therapy: II. The problem of radiation quality and RBE.

    abstract::The correlation between radiation quality and cellular RBE of a mixed n-gamma field produced by a collimated fast-neutron beam produced by the bombardment of 14 MeV deuterons on Be in a water phantom is investigated. The microdosimetric parameters yF and YD are used for a physical description of the local distribution...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/26/1/006

    authors: Booz J,Fidorra J

    更新日期:1981-01-01 00:00:00

  • Computer-aided diagnosis of lung cancer: the effect of training data sets on classification accuracy of lung nodules.

    abstract::This study aims to develop a computer-aided diagnosis (CADx) scheme for classification between malignant and benign lung nodules, and also assess whether CADx performance changes in detecting nodules associated with early and advanced stage lung cancer. The study involves 243 biopsy-confirmed pulmonary nodules. Among ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/1361-6560/aaa610

    authors: Gong J,Liu JY,Sun XW,Zheng B,Nie SD

    更新日期:2018-02-05 00:00:00

  • Depth of ionization chamber in water.

    abstract::The device developed by the authors and described here enables the user to measure the depth from the water surface to the point of measurement for a cylindrical ion chamber with a waterproof plastic cap in a water phantom, free of surface-tension error with a high precision. The device seeks vertical orientation and ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/40/8/007

    authors: Tailor RC,Tello VM

    更新日期:1995-08-01 00:00:00

  • Linear dimension reduction of sequences of medical images: I. Optimal inner products.

    abstract::A general theory is presented for minimizing noise in linear dimension reduction of sequences of medical images when the factors and the covariance matrix and mean of the noise are given. A dimension reduction is optimal when all diagonal elements in the covariance matrix of the noise in the signal (factor) space are ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/40/11/010

    authors: Hermansen F,Lammertsma AA

    更新日期:1995-11-01 00:00:00

  • Directional x-ray dark-field imaging.

    abstract::We introduce a novel x-ray imaging approach that yields information about the local texture of structures smaller than the image pixel resolution inside an object. The approach is based on a recently developed x-ray dark-field imaging technique, using scattering from sub-micron structures in the sample. We show that t...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/55/12/004

    authors: Jensen TH,Bech M,Bunk O,Donath T,David C,Feidenhans'l R,Pfeiffer F

    更新日期:2010-06-21 00:00:00

  • Monte Carlo correction factors for a Farmer 0.6 cm3 ion chamber dose measurement in the build-up region of the 6 MV clinical beam.

    abstract::Reference dosimetry of photon fields is a well-established subject and currently available protocols (such as the IAEA TRS-398 and AAPM TG-51) provide methods for converting the ionization chamber (IC) reading into dose to water, provided reference conditions of charged particle equilibrium (CPE) are fulfilled. But th...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/51/6/011

    authors: Pena J,Sánchez-Doblado F,Capote R,Terrón JA,Gómez F

    更新日期:2006-03-21 00:00:00

  • Estimation of mean glandular dose for contrast enhanced digital mammography: factors for use with the UK, European and IAEA breast dosimetry protocols.

    abstract::The UK, European and IAEA protocols for breast dosimetry in mammography use tabulations of conversion factors, which relate measurements of incident air kerma to the mean glandular dose to the breast. To supplement the existing tabulations, a Monte Carlo computer program has been used to calculate conversion factors f...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/59/9/2127

    authors: Dance DR,Young KC

    更新日期:2014-05-07 00:00:00

  • Modelling pencil-beam divergence with the electron pencil-beam redefinition algorithm.

    abstract::The electron pencil-beam redefinition algorithm (PBRA), which is used to calculate electron beam dose distributions, assumes that the virtual source of each pencil beam is identical to that of the broad beam incident on the patient. In the present work, a virtual source specific for each pencil beam is modelled by inc...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/46/11/306

    authors: Boyd RA,Hogstrom KR,White RA,Starkschall G

    更新日期:2001-11-01 00:00:00

  • Three-dimensional FDTD simulation of biomaterial exposure to electromagnetic nanopulses.

    abstract::Ultra-wideband (UWB) electromagnetic pulses of nanosecond duration, or nanopulses, have recently been approved by the Federal Communications Commission for a number of different applications. They are also being explored for applications in biotechnology and medicine. The simulation of the propagation of a nanopulse t...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/50/21/007

    authors: Simicevic N

    更新日期:2005-11-07 00:00:00

  • Commissioning of pencil beam and Monte Carlo dose engines for non-isocentric treatments in scanned proton beam therapy.

    abstract::This work describes the dosimetric commissioning of the treatment planning system (TPS) RayStation v6.1 from RaySearch Laboratories (Stockholm, Sweden) for a synchrotron-based scanned proton beam delivery with isocentric and non-isocentric setups at MedAustron. Focus was on the comparison of the pencil beam (PBv4.1) a...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/1361-6560/ab3557

    authors: Carlino A,Böhlen T,Vatnitsky S,Grevillot L,Osorio J,Dreindl R,Palmans H,Stock M,Kragl G

    更新日期:2019-08-28 00:00:00

  • Respiration gated radiotherapy treatment: a technical study.

    abstract::In order to optimize external-beam conformal radiotherapy, patient movement during treatment must be minimized. For treatment on the upper torso, the target organs are known to move substantially due to patient respiration. This paper deals with the technical aspects of gating the radiotherapy beam synchronously with ...

    journal_title:Physics in medicine and biology

    pub_type: 杂志文章

    doi:10.1088/0031-9155/41/1/007

    authors: Kubo HD,Hill BC

    更新日期:1996-01-01 00:00:00