Abstract:
:It is shown that the properties of ATPase (EC 3.6.1.3) of Micrococcus luteus depend only to some extent on the state of the membrane to which it is attached. Its interaction with the membrane appears to be largely controlled by polar forces. It is shown, however, that the UV-sensitivity of the membrane-bound ATPase is also significantly influenced by the state of membrane lipids.
journal_name
Radiat Environ Biophysjournal_title
Radiation and environmental biophysicsauthors
Volotovskij J,Risi S,Dose Kdoi
10.1007/BF01323619keywords:
subject
Has Abstractpub_date
1976-03-30 00:00:00pages
13-8issue
1eissn
0301-634Xissn
1432-2099journal_volume
13pub_type
杂志文章abstract::The antioxidant properties of hydroxycinnamic acid derivatives (HCA) were studied by laser flash photolysis. The transient species with maximum absorption at 360 nm were assigned to the phenoxyl radical of HCA. The SO (4) (.-) induced oxidation of HCA was also investigated. It was shown that the interaction of SO (4) ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-006-0041-8
更新日期:2006-05-01 00:00:00
abstract::The naturally synchronous development of early mouse embryos was exploited to address the question, whether micronuclei require a mitosis for expression or whether they can be expressed in the same cell cycle, in which exposure to X-rays or caffeine took place. Experiments with 2-cell and with 4-cell embryos showed th...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01219345
更新日期:1991-01-01 00:00:00
abstract::Native horseradish peroxidase, as well as its reduced and carboxymethylated form, and the apoenzyme, showed resistance to photodynamic action. Sensitivity to this action was detected only in reduced and carboxymethylated apoenzyme, when the photooxidation of its histidine residues was observed. When analyzing the bulk...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01212653
更新日期:1985-01-01 00:00:00
abstract::Various transport models are presently used to predict the long-term migration behaviour of fallout radiocesium on the soil. To examine to what extent the uncertainty of these predictions is influenced by the spatial variability of the migration rates, we determined the depth profiles of Chernobyl-derived 137Cs at 100...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s004110000062
更新日期:2000-09-01 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::To explore possible applications of iodoacetate (IA), a glycolytic inhibitor, in cancer treatment, we screened its cytotoxicity and radioprotective/sensitizing efficacy in three different mammalian cell lines; A549 (human lung carcinoma), MCF7 (human mammary cancer), a non-cancerous CHO (Chinese hamster ovary) cells a...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-017-0699-0
更新日期:2017-08-01 00:00:00
abstract::The work reported here was originally motivated by a discussion of Monte Carlo computer codes for electron transport in water given in Report No. 130 by the National Council on Radiation Protection and Measurements (NCRP). It was pointed out (correctly) that a published depth-dose distribution calculated by the Oak Ri...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-003-0201-z
更新日期:2003-10-01 00:00:00
abstract::Among the various methods for studying the relative effects of transmutation and radiation of incorporated nuclides, simulation of beta radiation by external gamma exposure is of practical importance. Self-irradiation and mutual irradiation of the labeled cells cannot be neglected in any case. Furthermore, additional ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01326755
更新日期:1975-01-01 00:00:00
abstract::For radiation exposures employing targeted sources such as particle microbeams, the deposition of energy and dose will depend on the spatial heterogeneity of the sample. Although cell structural variations are relatively minor for two-dimensional cell cultures, they can vary significantly for fully differentiated tiss...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-011-0371-z
更新日期:2011-08-01 00:00:00
abstract::Microcalorimetric experiments on growth and maintenance metabolism of Saccharomyces strains ranging from haploid to hexaploid are described. During growth, the mean dry weight, the mean volume and the maximum heat flux of the cells are nearly linear functions of ploidy. These parameters are correlated with the cell co...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01323624
更新日期:1976-03-30 00:00:00
abstract::Ionizing radiation can produce adverse biological effects in astronauts during space travel. Of particular concern are the types of radiation from highly energetic, heavy, charged particles known as HZE particles. The aims of our studies are to characterize HZE particle radiation induced biological effects and evaluat...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-006-0089-5
更新日期:2007-06-01 00:00:00
abstract::Irradiation of human lymphocytes by alpha-particles under different conditions has been seen to be substantially more effective in the induction of dicentric chromosomes than irradiation by gamma-rays. However, the relative biological effectiveness (RBE) determined in these studies differed by a factor of more than 10...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s004110050028
更新日期:1996-08-01 00:00:00
abstract::More accurate reconstruction of the radioactive contamination of the Techa River system in 1949-1951 has been made on the basis of refined data on the amounts and the rate of discharge of radionuclides into the Techa River from the Mayak Production Association; this has led to the development of a modified Techa River...
journal_title:Radiation and environmental biophysics
pub_type: 历史文章,杂志文章
doi:10.1007/s00411-012-0414-0
更新日期:2012-11-01 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::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::In mice, persisting radiation-induced growth retardation of hematopoietic tissue suggested that at least part of the surviving stem cells are genetically injured. Additional mitotic stress some time after the radiation insult might remove injured stem cells, thus improving the overall recovery of the irradiated bone m...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01211410
更新日期:1987-01-01 00:00:00
abstract::The migration of radionuclides from waste repositories to the biosphere potentially leads to a contamination of soil. Due to the importance of food production, the mobilisation and accumulation behaviour of long-lived radionuclides in the soil plays a key role in performance assessment studies. In this paper, the main...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章,评审
doi:10.1007/s004110100098
更新日期:2001-06-01 00:00:00
abstract::Exposure to ionizing radiation has well-documented long-term effects on cancer rates and other health outcomes in humans. While in vitro experimental studies had demonstrated that the nature of some radiation effects depend on both total dose of the radiation and the dose rate (i.e., the pattern of dose distribution o...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-016-0670-5
更新日期:2017-03-01 00:00:00
abstract::To investigate whether residual radiation damage in hematopoietic tissue is measurable in situ by a change in cell turnover, the retention of the thymidine analogue 5-(125-I)iodo-2'-deoxyuridine (125-IUdR) following incorporation into DNA of cells in bone marrow and spleen of mice was measured 35 days after 0-500 rad ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01325468
更新日期:1982-01-01 00:00:00
abstract::The effect of supplying three different stable iodine levels (about 70, 80, and 160 mg day-1) in the daily feed of four dairy cows has been studied for the excretion pattern of 131I. None of the different treatments had a statistically significant effect. A mean milk transfer coefficient of 0.015 +/- 0.001 d l-1 was d...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01212680
更新日期:1994-01-01 00:00:00
abstract::Combined action of irradiation (IR), shear stress, and high blood pressure is well recognized to induce damage to vasculature, while data on pathological effects of IR in large peripheral vessels with low blood pressure are scarce. The purpose of the present study was hence to investigate time- and dose-dependent effe...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-013-0492-7
更新日期:2014-03-01 00:00:00
abstract::The oxyhemoglobin saturation (HbO2) of single red blood cells within tumor microvessels (diameter: 3-12 micrometers) of DS-Carcinosarcoma was studied using a cryophotometric micromethod. In untreated control tumors (mean tissue temperature approx. 35 degrees C) the measured values scattered over the whole saturation r...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01323754
更新日期:1982-01-01 00:00:00
abstract::Activity concentrations of the selected radionuclides (40)K, (226)Ra and (232)Th were measured in surface soil samples collected from 38 cities in the southwest region of Nigeria by means of gamma spectroscopy with a high-purity germanium detector. Measured activity concentration values of (40)K varied from 34.9 +/- 4...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-009-0225-0
更新日期:2009-08-01 00:00:00
abstract::The biological phenomena observed at low doses of ionizing radiation (adaptive response, bystander effects, genomic instability, etc.) are still not well understood. While at high irradiation doses, cellular death may be directly linked to DNA damage, at low doses, other cellular structures may be involved in what are...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-015-0622-5
更新日期:2016-03-01 00:00:00
abstract::The relationship between occupational exposure to extremely low-frequency electromagnetic fields and adult leukaemia has been studied extensively during the last decade. The first studies were based on crude exposure assessments, estimated through job titles, with no or only limited control confounding factors. The re...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章,评审
doi:10.1007/s004110050036
更新日期:1996-11-01 00:00:00
abstract::Blue (F450) and green (F530) leaf fluorescence were studied together with the red chlorophyll fluorescence (emission maxima F690 and F735) during light-induced chlorophyll fluorescence induction kinetics (Kautsky effect) in predarkened leaves of wheat (Triticum aestivum L.) and soybean (Glycine max L.). The intensity ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01225923
更新日期:1993-01-01 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::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::The rate constants for the photodynamic inactivation of hen egg-white lysozyme at different temperatures were studied. Arrhenius plots of the methylene blue sensitized photo-inactivation of lysozyme gave an experimental activation energy of 7.5 kcal/mol. The rate constants for the photodynamic inactivation of lysozyme...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01326898
更新日期:1979-02-23 00:00:00
abstract::Mass attenuation coefficient, μm, atomic cross-section, σi, electronic cross-section, σe, effective atomic number, Zeff and effective electron density, Nel, were determined experimentally and theoretically for some vitamins (retinol, beta-carotene, thiamine, riboflavin, niacinamide, pantothenic acid, pyridoxine, bioti...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-012-0427-8
更新日期:2012-11-01 00:00:00