effects of chronic irradiation on conifers.

by Wilma Patricia Sweaney in [Toronto]

Written in English
Published: Pages: 36 Downloads: 747
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  • Coniferae,
  • Plants -- Effect of radiation on

Edition Notes

ContributionsToronto, Ont. University. Theses (M.Sc.)
LC ClassificationsLE3 T525 MSC 1967 S84
The Physical Object
Pagination[36 leaves]
Number of Pages36
ID Numbers
Open LibraryOL16780959M

UV blood irradiation is an odd treatment, with an peculiar history. UV light does have many effects on tissues, as a trip to Hawaii can rapidly demonstrate to a pasty Oregonian. In my world UV is used to sterilize the environment and UV kills off everything from MRSA to C. difficile to tuberculosis. This book is the seventh in a series of titles from the National Research Council that addresses the effects of exposure to low dose LET (Linear Energy Transfer) ionizing radiation and human health. Updating information previously presented in the publication, Health Effects of Exposure to Low Levels of Ionizing Radiation: BEIR V, this. Acute radiation syndrome (ARS), also known as radiation sickness or radiation poisoning, is a collection of health effects due to exposure to high amounts of ionizing radiation over a short period of time. Symptoms can begin within an hour and may last for several months. Symptoms within the first few days typically include nausea, vomiting, and loss of appetite. Late-onset effects of exposure to ionising radiation on the human body have been identified by long-term, large-scale epidemiological studies. The cohort study of Japanese survivors of the atomic bombings of Hiroshima and Nagasaki (the Life Span Study) is thought to be the most reliable source of information about these health effects because of the size of the cohort, the exposure of a Cited by:

Objective: The purpose of this study was to assess the effects of hyperbaric oxygen (HBO) and near-infrared light therapy on wound ound Data: Light-emitting diodes (LED), originally developed for NASA plant growth experiments in space show promise for delivering light deep into tissues of the body to promote wound healing and human tissue by:   List of Disadvantages of Food Irradiation. 1. No Promises One of the problems with food irradiation is that there is no definitive way of killing all of the organisms that can come into contact with our foods. Some organisms are in fact resistant to the mild radiation that is utilized. 2. Animals.   The effect of low-intensity laser (GaAsAl) irradiation on bone repair in the femurs of mice was investigated. An experimental model of hole injury with surgery drills was used in 20 mouse femurs followed by a study of the effect of low-energy laser irradiation on bone repair. The experimental model was divided into two by: Low level laser irradiation has an anti-inflammatory effect, both general and local. Materials and methods: The research was done on patients who had chronic periodontal disease (mild periodontitis) with expressed clinical symptoms of gingival inflammation. All patients in the study underwent conservative by:

effects of chronic irradiation on conifers. by Wilma Patricia Sweaney Download PDF EPUB FB2

Radialion Bolarg,Vol. 8, pp. 59 to Pergamon Press. Printed in Great Britain. GERMINATION AND SURVIVAL OF CONIFERS FOLLOWING CHRONIC GAMMA IRRADIATION OF SEED* G. CLARK and W.

SWEANEY Zoology Department, University of Toronto, Toronto 5, Canada W. BUNTING Nursery Superintendent, Department of Lands and Forests, Orono, Ontario, Canada D.

Cited by: 6. As in acute irradiation experiments, hypersensitivity of coniferous trees to radiation was observed also effects of chronic irradiation on conifers.

book chronic irradiation experiments [10, 11]. The mean lethal dose-rate after irradiating six species of coniferous trees for 3 years was R/day ( mGy/day), which was approximately 10% of the mean lethal dose-rate in seven species of Author: Yoshito Watanabe. Kalchenko VA, Spirin DA () Genetic effects revealed in populations of Pinus sylvestris L.

growing under exposure to small doses of chronic irradiation. Russ J Genet – Google Scholar Author: Stanislav Geras’kin, Alla Oudalova, Nina Dikareva, Elena Chernonog, Julia Prytkova, Vladimir Dikarev.

The radiosensitivity of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), from two provenances representing the coastal and interior regions in Brit Cited by: 1. Effects of simulated radioactive fallout buildup and decay on survival and yield of lettuce, maize, radish, squash and tomato A.H.

Sparrow, Brenda Floyd, P.J. Bottino Pages Part III discusses the results of fast neutron irradiation while Part IV covers the relative biological efficiency of fast neutrons and gamma rays for chronic exposures.

Show less. Chronic Radiation Hazards: An Experimental Study with Fast Neutrons describes a large-scale experiment on the hazards to be expected from low and very low levels of chronic irradiation by fast neutrons.

Chronic irradiation permits exposure during all stages of development and produces more severe and more varied morphogenetic responses (without killing) than acute irradiation. Morphogenetic responses to radiation have been reviewed by Johnson (a), Tolbert and Pearson (), Gunckel and Sparrow (), Sparrow and Gunckel ( a), and Cited by: Effect of X-irradiation and post irradiation storage of peanut seed on nucleic acid metabolism in cotyledons.

[29] Greenwood L N and Knowles J F Effect of chronic irradiation on the humoral immune response of a marine fish, the eelpout (Zoarces viviparus L) Int.

Radi at. Biol. 67 71–7 A AR. Observations of effects of radiation exposure on populations and ecosystems are briefly discussed. The typical reactions of phytocenosis to irradiation at high doses are known to be reduction in.

In relation to the end-points studied for chronic irradiation, the effects on reproductive capacity have been the most extensively analysed (% of the chronic data), followed by mortality (34%), morbidity (11%) and mutation induction (%).Cited by: From Wikipedia, the free encyclopedia.

Jump to navigation Jump to search. Chronic radiation syndrome (CRS) or chronic radiation enteritis is a constellation of health effects of radiation that occur after months or years of chronic exposure to high amounts of radiation.

Chronic radiation syndrome develops with a speed and severity proportional to the radiation dose received, i.e., it is a deterministic effect. Chronic gamma irradiation of an oak-pine forest produced striking changes in the soil microfungal community.

Under low irradiation, the population was typical of sandy, podzolic, conifer-hardwood. Phillips TL. An ultrastructural study of the development of radiation injury in the lung.

Radiology. Jul; 87 (1)– [] [Google ScholarGerber GB, Dancewicz AM, Bessemans B, Casale G. Biochemistry of late effects in rat lung after hemithoracic by: The effects of radiation therapy on the reproductive system are especially significant because patients may want to cryopreserve their eggs or sperms for later use.

The severity of these effects can be seen by the fact that 1 in every 6 women exposed to radiation therapy in childhood experienced ovarian failure. The most common isolates in the post irradiation chronic sinusitis group was S.

aureus while those in the other group were Haemophilus influenzae, and Pseudomonas aeruginosa. The isolation rate of gram-positive cocci in the post irradiation group was higher than in the non irradiated patients.

(% compared with 30%, respectively; P. Menstrual Pain Assessment. All participants (n = 51) completed two questionnaires, the verbal rating scale (VRS) and the numeric rating scale (NRS) [33, 34], to assess the extent of pain on days 1 to 3 of three menstrual shown in Figure 1, the pain assessment for the first menstrual cycle was conducted without any belt (blank group).For the second and third menstrual cycles Cited by: 1.

Under laser blood irradiation, anti-inflammatory effects were observed that improved the immunologic activity of the blood 1. The hypoxia of the tissue is improved which leads to a normalization of the tissue metabolism. In addition the fibrinolysis will be activated. Apart from the Cited by: 2.

The effects of chronic irradiation on the life-time breeding performance of the small tropical fish, Poecilia reticulata, have been investigated at mean dose-rates of 017, 040 and 127 rad hour − total fecundity was markedly (P Cited by: RadiationEffectsDamage - 3 - K. Holbert 2. General Radiation Effects The general types of radiation effects on materials can be categorized into (1) Impurity Production, that is, transmutation of nuclei into other nuclei which themselves may be radioactive; this mechanism is caused by neutrons through fission and activation (capture).

Radiocobalt has been used as a source of gamma rays in a study of the effect of chronic irradiation on growing plants. The installation and method of operation of sources of approximately 16 and curies is described.

The Co60 was placed in the center of an experimental plot in such a fashion that it could be operated safely by remote by: Food irradiation, the process of bathing edibles in heavy doses of gamma radiation to preserve them, was first put into practical use by the U.S.

Army back in To investigate the effects of acute and chronic γ-irradiation on antioxidant enzymes, we examined activity of four antioxidant enzymes: catalase (CAT), peroxidase (POD), ascorbate peroxidase, and.

Low Doses (Chronic) Biological effects of radiation are typically divided into two categories. The first category consists of exposure to high doses of radiation over short periods of time producing acute or short term effects.

The second category represents exposure to low doses of radiation over an extended period of time producing chronic or. Food irradiation can kill insects, moulds and bacteria, but it cannot kill viruses. Effects of irradiation on food Some foods, such as dairy foods and eggs, cannot be irradiated because it causes changes in flavour or texture.

Fruits, vegetables, grain foods, spices. Saplings surviving the chronic gamma irradiation showed various response to the radiation, namely, growth inhibition and abnormality in appearance. Most conspicuous effect of the radiation was the growth inhibition, especially, in the exposure range around 10 R/day for the conifers and 80 to Al/day for the broad-leaved trees.

Effects of chronic irradiation on plants. Dose rate (µGy h−1)Species Radiation Effects described End-point Reference – Pine Gamma Reduced trunk growth of mature Morbidity [16] trees Death of some conifers; little Mortality [4] changes in populations (1–5)× Pine Gamma Reduced canopy cover of individual Morbidity [4]Cited by: The acute effects of total-body irradiation are also ameliorated by antioxidant therapies.

Administration of MnSOD-PL prior to total-body irradiation not only improved survival from the LD 50/30 dose of Gy in C57BL/6HNsd mice but also ameliorated the late radiation-induced life shortening in male mice (12).Cited by: Unfortunately, this book can't be printed from the OpenBook.

If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF. Progress is reported in a study of the effects of ionizing radiation on the reproductive process and survival of forest trees.

Data are presented from studies on tue effect of low level chronic gamma irradiation on a pitch pine- oak forest. Blood irradiation therapy is a alternative medical procedure in which the blood is exposed to low level light (often laser light) for therapeutic reasons.

The practice was originally developed in the United States, but most recent research on it has been conducted in Germany (by UV lamps) and in Russia (in all variants). Low-level laser therapy has been tested for a wide range of conditions Specialty: Hematology.Life-cycle chronic gamma exposure of Arabidopsis thaliana induces growth effects but no discernable effects on oxidative stress pathways Post-irradiation, the conifers showed dose-rate.Suggested Citation:"6 Evidence of Biological Effects of RF Exposure Relevant to PAVE PAWS Radar System." National Research Council.

An Assessment of Potential Health Effects from Exposure to PAVE PAWS Low-Level Phased-Array Radiofrequency Energy. Washington, DC: The National Academies Press.

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