Abstract：
:Growth rates and cell diameters were determined from 12 species of plant roots exposed to a 60-Hertz (Hz) electric field of 360 Volts per meter (V/m) in an aqueous inorganic nutrient medium [conductivity: 0.07-0.09 Siemens per meter (S/m)]. The degree of growth depression ranged from zero to nearly 100 percent of control. Cell diameters ranged from 13.5 to 31.8 micron as an averaged value for procambial, cortical, and meristem cells. Sensitivity to the electric field as determined by root growth rate reduction increased with increasing cell size. Sensitivity also increased with increase in 60 Hz induced transmembrane potentials; the transmembrane potential threshold for growth reduction was about 6.0 mV and the potential for near-complete cessation of growth was about 10-11 mV. Two different hypothetical mechanisms of action by which applied electric fields induce biological effects at the cellular level were tested. The two mechanisms pertain to different possible modes of action of applied electric fields: one mechanism postulates the involvement of the transmembrane field, the other mechanism postulates the tangential electric field as the important factor for inducing biological effects. The data support the transmembrane and not the tangential field mechanism. It is concluded that the effects observed are consistent with a membrane related mechanism and that there is a narrow range (a few mV) between threshold and debilitating induced membrane potentials.
journal_name
Radiat Environ Biophysjournal_title
Radiation and environmental biophysicsauthors
Inoue M,Miller MW,Carstensen EL,Brayman AAdoi
10.1007/BF01210937subject
Has Abstractpub_date
1985-01-01 00:00:00pages
303-14issue
4eissn
0301-634Xissn
1432-2099journal_volume
24pub_type
杂志文章abstract：:Dose conversion coefficients (DCCs) for assessment of internal and external radiation exposures to terrestrial and aquatic biota are compiled for 75 radionuclides, for 14 terrestrial and 22 aquatic reference organisms. DCC values for internal exposure are calculated based on a homogeneous distribution of the radionucl...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-008-0159-y
更新日期：2008-04-01 00:00:00
abstract：:Waterborne radioactive releases into the Techa River from the Mayak Production Association in Russia during 1949-1956 resulted in significant doses to about 30,000 persons who lived in downstream settlements. The residents were exposed to internal and external radiation. Two methods for reconstruction of the external ...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-015-0611-8
更新日期：2015-11-01 00:00:00
abstract：:The results of a study in which groups of sheep were given single oral administrations of 14C, 3H and 35S and then slaughtered over a period of 1 year are reported. The experimental data were used to investigate the potential of metabolically based models for describing the transfer of the three radionuclides to sheep...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s004110050078
更新日期：1998-02-01 00:00:00
abstract：:The Goiânia accident, Brazil, was used as an opportunity to quantify the contributions of different mechanisms, in particular mass loading, leading to caesium uptake by leafy vegetables in a semi-urban environment contaminated with 137Cs. Soil splash contributions of 70-90% were quantified for lettuce and 50-60% for g...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01210458
更新日期：1994-01-01 00:00:00
abstract：:In this study, temporal variations of indoor radon concentrations in Bulgaria were investigated. The radon concentrations were measured by nuclear track detectors as part of the Bulgarian National Survey, performed in the dwellings of 28 regional districts. The detectors were exposed through a year in two consecutive ...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-019-00789-y
更新日期：2019-08-01 00:00:00
abstract：:The kinetics of fluoresceindiacetate (FDA)-hydrolysis in erythrocytes, CHO-cells and homogenized cells was investigated by means of fluorescence spectroscopy. At a 10(-6)m FDA concentration the enzymatic conversion in the homogenized cells can be described by first order reactions. When studying intact cells, total ki...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01331024
更新日期：1977-04-27 00:00:00
abstract：:The fluorescent intercalation complex of ethidium bromide with DNA was used as a probe to demonstrate damage in the base-pair region of DNA, due to the action of superoxide radicals. The O.2- radical itself, generated by gamma-radiolysis of oxygenated aqueous Na-formate solutions, is rather ineffective with respect to...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01326732
更新日期：1984-01-01 00:00:00
abstract：:The aim of this study was to verify whether extremely low frequency (ELF) magnetic fields (MF) could affect transposition activity like some environmental stress factors such as heat shock or UV irradiation. Using an Escherichia coli Lac Z(-) strain transformed with a plasmid containing a Tn 10 derivative element expr...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-003-0192-9
更新日期：2003-07-01 00:00:00
abstract：:During anthropogenic activities, such as agricultural soil management and traffic on unpaved roads, size distribution measurements were performed of atmospheric particulate radionuclides at a site in the Chernobyl 30-km exclusion zone. Analysis of cascade impactor measurements showed an increase of the total atmospher...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s004110050118
更新日期：1998-10-01 00:00:00
abstract：:The Auger electron emitter 123I was examined in the form of 4-[123I]iodoantipyrine and as [123I]NaI for its effectiveness in killing cells of different sensitivity to photon irradiation. Micronucleus assays showed that 4-[123I]iodoantipyrine is 2-3 times more effective in cell inactivation than [123I]NaI. This can be ...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s004110000083
更新日期：2001-03-01 00:00:00
abstract：:Carrier-free 11C-labeled carbon monoxide was produced by proton irradiation of a nitrogen gas flow target via the 14N(p, alpha)11C process followed by on-line reduction of the predominantly formed 11C-carbon dioxide with a yield of 0.4 mCi/muAmin. After appropriate quality control about 2 mCi of carrier-free 11C-carbo...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01323415
更新日期：1975-12-04 00:00:00
abstract：:Model experiments with two structurally different proteins (alcohol dehydrogenase and salmine) show that glycine, alanine, and tyrosine are by far more frequently involved in photochemically induced cross-link formations with DNA than is cysteine. The yields for cross-link formation of thymidine with salmine (cysteine...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01332171
更新日期：1976-07-30 00:00:00
abstract：:The major goal of this study was to identify and quantitatively describe the association between the characteristics of chronic (low-dose rate) exposure to (low LET) ionizing radiation and cellularity of peripheral blood cell lines. About 3,200 hemograms (i.e., spectra of blood counts) obtained over the years of maxim...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-010-0269-1
更新日期：2010-05-01 00:00:00
abstract：:Those working in interventional cardiology are exposed to varying radiation doses during diagnostic and interventional procedures. The work presented in this paper aimed to monitor the effective doses received by different categories of medical staff members practicing interventional cardiology procedures including se...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-020-00862-x
更新日期：2020-11-01 00:00:00
abstract：:It is shown by UV absorption and absolute fluorescence spectroscopy of solutions containing both DNA and quinacrine that the components experience mutual radio-protection due to scavenging of water radicals. From measurements at different ionic strengths it is inferred that quinacrine bound to DNA is more efficiently ...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF02339804
更新日期：1975-06-13 00:00:00
abstract：:Survival and G2 dalay following exposure to either 60Cobalt-gamma-rays or 241Americium-alpha-particles were studied in eight mammalian cell lines of human and animal origin including human fibroblasts from normal individuals and from patients with Ataxia telangiectasia or Fanconi's anemia. For both endpoints the effec...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01325466
更新日期：1982-01-01 00:00:00
abstract：:The risk of cancer after diagnostic X-rays received as fetus or during early childhood has been investigated in many studies. The results of recent epidemiological studies are summarized in a present systematic review. The strategies for literature search, inclusion criteria, and items for study quality assessment wer...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章,评审
doi：10.1007/s00411-008-0171-2
更新日期：2008-07-01 00:00:00
abstract：:Frequently knowledge of elemental content of human organs and tissues is required for a variety of applications. These can include brachytherapy and radiotherapy planning, radiation dosimetry and radiation protection. Revised reference values of chemical element mass fractions in normal and cancerous prostate tissues ...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-020-00884-5
更新日期：2021-01-02 00:00:00
abstract：:The effect of negative pions (peak and plateau), photons (140 kV and 29 MeV), and 20 MeV electrons on the proliferative capacity of Ehrlich ascites carcinoma cells was investigated. Proliferative survival curves plotted for the modalities employed are presented. Under the experimental conditions used, the peak pions w...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01358287
更新日期：1979-08-10 00:00:00
abstract：:In the mountainous "Hohe Tauern" region of Salzburg (Austria), milk samples have been collected in a long-term montitoring programme since 1988, at eight alpine sites used for extensive, seasonal stock farming. For this alpine environment with its acidic soils developed on silicate bedrock, high soil-to-plant transfer...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-008-0192-x
更新日期：2009-02-01 00:00:00
abstract：:Total body Irradiation (TBI) is often used for conditioning, prior to bone marrow transplantation. Doses of 8-14 Gy in 1-8 fractions over 1-4 days are administered using low dose rate external beam radiotherapy (EBRT). When necessary, consolidation EBRT using conventional doses, fractionation and dose rate is given. T...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-009-0238-8
更新日期：2009-11-01 00:00:00
abstract：:About a century ago, Conrad Röentgen discovered X-rays, and Henri Becquerel discovered a new phenomenon, which Marie and Pierre Curie later coined as radio-activity. Since their seminal work, we have learned much about the physical properties of radiation and its effects on living matter. Alas, the more we discover, t...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章,评审
doi：10.1007/s00411-007-0146-8
更新日期：2008-02-01 00:00:00
abstract：:C57Bl6-lacZ animals were exposed to a range of low dose-rate simulated solar particle event (sSPE) radiation at the NASA-sponsored Research Laboratory (NSRL) at Brookhaven National Laboratory (BNL). Peripheral blood was harvested from animals from 1 to 12 days after total body irradiation (TBI) to quantify the level o...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-010-0291-3
更新日期：2010-08-01 00:00:00
abstract：:The sulphur-containing radioprotectors mercaptoethylamine (MEA), aminoethylisothiourea (AET), 2- aminothiazoline , 4-oxo-2- aminothiazoline , and S-S-3- oxapentane -1,5- diisothiourea , and the radioprotective biogenic amines serotonin, histamine, and dopamine, caused the elevation of cAMP content and intensified the ...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01213732
更新日期：1984-01-01 00:00:00
abstract：:Human female lymphocytes were exposed to X-rays in vitro at 7 different doses between 40-280 R. In 830 metaphases chromosome analyses were carried out with either conventional staining or G-banding, respectively. 486 breakpoints are non-randomly distributed between chromosomes and chromosome arms. An excess of lesions...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01340573
更新日期：1979-01-01 00:00:00
abstract：:Within the track structure code PARTRAC, DNA strand break induction by direct and indirect radiation action was calculated for the E. coli catabolite gene activator protein (CAP) DNA complex with (125)I located at the position of the H(5) atom of the cytosine near the center. The shape of the resulting DNA fragment si...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-004-0231-1
更新日期：2004-05-01 00:00:00
abstract：:This work describes the radiological assessment of the near-surface Maisiagala radioactive waste repository (Lithuania) over the period 2005-2012, with focus on water pathways and special emphasis on tritium. The study includes an assessment of the effect of post-closure upgrading, the durability of which is greater t...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-013-0459-8
更新日期：2013-05-01 00:00:00
abstract：:The number and type of stem cells in spleen and bone marrow of mice were determined after exposure to a single dose of 150 R on day 6, to a single dose of 500 R on day 6 or day 9 or to a fractionated dose of 150 R + 350 R on day 6 and 9. The stem cells were assayed on the basis of colony forming units (CFU) in spleen ...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01324267
更新日期：1980-01-01 00:00:00
abstract：:Since the early 1990s, information on radiation-exposed populations other than those exposed from the Chernobyl accident in 1986 has become increasingly available for international scientific research. It is essential to understand how the cohorts of exposed populations have been defined and what mechanisms can be use...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章,评审
doi：10.1007/s00411-001-0128-1
更新日期：2002-03-01 00:00:00
abstract：:Quantitative cancer incidence data exist for various laboratory animal models, but little of this information is usable for estimating human risks, primarily because of uncertainties about possible mechanistic differences among species. Acceptance and utilization of animal data for human risk assessment will require a...
journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/s00411-007-0106-3
更新日期：2007-06-01 00:00:00
