biology hazards of radiation and radiation protection

... models developed and used in various offices of EPA's Office of Air and Radiation These emissions models provide estimates of emissions of five criteria air pollutants2 from each of several key ... Leland Deck of Stratus Consulting; Jim Wilson and Frank Divita of E.H Pechan and Associates; Sharon Douglas and Boddu Venkatesh of ICF International; Neil Wheeler of Sonoma Technologies; and ... Davidson, and Jason Lynch; and contractor staff Andrew Bollman, Maureen Mullen and Kirstin Thesing of E.H Pechan and Associates; Belle Hudischewskyj, Tom Myers, Yi Hua Wei, and Jay Haney of ICF...

Ngày tải lên: 15/03/2014, 16:20

... and survey radiation, and the use of such instrumentation; and of to all the (3) the individual's responsibility to adhere to the NRC’s regulations and the Commands's radiation material (4) radiation ... monitor, and survey radiation, and the use of such instrumentation; and (2) biological effects of radiation; (4) radiation safety techniques and procedures This training will include the use of time, ... material, radiation generating devices, and radioactive and mixed waste with which they may be working; d A working knowledge of the USACE and his or her USACE Command Radiation Protection Program, and...

Ngày tải lên: 05/03/2014, 19:20

... understanding of the sources of medically applied radiation and appropriate protective measures allows medical and other health personnel to work safely with or near sources of radiation Ionizing radiation ... aspects of radiation safety and all types of radiation- producing sources have been developed by state and federal agencies, for the most part based upon recommendations of various radiation protection ... (not required for every license) and a Radiation Safety Officer 5.3 Radiation Safety Committee (RSC) and Radiation Safety Officer (RSO) The size of the program and federal or state licensing requirements...

Ngày tải lên: 15/03/2014, 06:20

... mechanisms of acute radiation injury in different organs Pathogenesis of Chronic Radiation Damage The pathogenesis of chronic radiation damage is even more complex than that of acute radiation damage and ... radiation treatment of head and neck cancers Acta Oncol 1988;27:185–194 Prof K.R Trott, Department of Radiation Biology, St Bartholomew’s and the Royal London School of Medicine and Dentistry, Charterhouse ... understood, and is likely complex This paper will overview our current understanding only of the effects of epidermal growth factor (EGF) and its receptor (EGFR) in cell and tumor response to radiation and...

Ngày tải lên: 28/03/2014, 11:20

... areas of applied radiation protection Radiation dosimetry, instrumentation, and external and internal radiation protection are extensively treated The chemical and biological effects of radiation ... Atomic Physics and Radiation Classical Physics Discovery of X Rays Some Important Dates in Atomic and Radiation Physics Important Dates in Radiation Protection Sources and Levels of Radiation Exposure ... to about half of the problems In summary, in its new edition, Atoms, Radiation, and Radiation Protection has been updated and expanded both in breadth and in depth of coverage Most of the new material...

Ngày tải lên: 04/06/2014, 16:05

... 4.2 Proof of Convergence Obviously, the existence and uniqueness of smooth solutions of 2.3 are equivalent to that of 4.6 or 4.9 Then, in order to rigorously justify the convergence of 2.3 to ... 1.1 and their convergence to the solutions of the compressible and nonisentropic Euler equations in a time interval independent of For this propose, we use the method of iteration scheme and ... are nonisentropic and compressible Euler equations The aim of this paper is to justify rigorously the local existence of smooth solutions of system 1.1 and the convergence of system 1.1 to this...

Ngày tải lên: 21/06/2014, 11:20

... Effect of ultraviolet radiation on the hatchability and survival of eggs and larvae of sheep nematode 61 Table The survival rate of ultraviolet radiated nematode larvae Time of observation (days) Radiation ... each of the six petri dishes used Five of these were exposed to UV radiation from a lamp source emitting a wavelength of 2.54 mm from a distance of 560 mm from the base of the containers to the radiation ... expose to high level of (60 minutes) of radiation might have been as a result of radiation damage to the larvae and hence interference with larval ability to induce hatching UV radiation cannot explain...

Ngày tải lên: 07/08/2014, 17:22

... stands at the Duparquet Lake Research Station (48º 30' N, 79º 20' W) originated from a 1923 fire and were characterised by mature stands of aspen, Jack pine, and spruce One of the spruce stands ... The Quebec stands were all located on clay soils Forest stands on Vancouver Island were located in a 89year-old Douglas-fir stand and a 45-year-old red alder stand The Douglas-fir stand was located ... when compared to the aspen and jack pine stands On Vancouver Island, overcast and clear sky RLRsensor were generally higher in Douglas fir stands between 90° and 70º, and lower below those elevations...

Ngày tải lên: 08/08/2014, 00:22

... stand affects growth and biomass partitioning of seedlings of European beech (Fagus sylvatica L.) and pendunculate oak (Quercus robur L.) and (ii) to what extent reductions of light quantity and ... coming through the canopy and/ or by the changed spectral composition of the radiation below the canopy In particular the ratio of the red components of radiation to those of the far red (R/FR-ratio) ... (tenth of a mm) of the main stem at the half length of the stem, length of first order branches (mm), diameter (tenth of a mm) of first order branches at its base were measured At the end of the...

Ngày tải lên: 08/08/2014, 01:21

... description of canopy water and CO exchange first demands that we model the absorption of net radiation and PAR by each layer The maritime pine forest of south-west France (Les Landes) consists of well-separated ... non-inter= density of solar radiation at LAI x and R is the net radiation at LAI x, (x) n and where all flux densities have units of cepted flux = = -2 Wm Example of radiation balance of a sunny day ... reflectance and transmittance of needles are estimated by summing the product of spectral reflectance and transmittance by the spectral density of the incident beam radiation of a selected clear day, and...

Ngày tải lên: 08/08/2014, 19:21

... involved in study conception and design and reviewing previous research GG was involved in scquisition of data and drafting of manuscript BE was involved in study conception and design BB was involved ... reconstruction of the resultant defect, total closure of the defect and providing structural stability should be aimed Any defects of smaller than cm at any location on the thoracic wall and any defects ... mediastinal invasion or lesions of extremely large sizes In our patient, the size of the lesion was 50% smaller and the findings of mediastinal invasion regressed upon two cures of neoadjuvant chemotherapy...

Ngày tải lên: 09/08/2014, 07:22

... supervision of planning, manuscript proof EV: physics data collection and analysis AC: physics data collection and analysis AR: patient accrual, management and data collection, manuscript proof and study ... outcome of treatments was recorded in terms of observed acute toxicity, particularly incidence of disuria and diarrhoea Toxicity scoring was assessed by non blind radiation oncologists in charge of ... diagnosis was assessed by means of standard diagnostic procedures including CT and MR imaging and clinical examination of patients Results Figure shows examples of dose distributions for two patients...

Ngày tải lên: 09/08/2014, 08:22

... conformity and spared more normal lung from irradiation, and therefore may have induced a low rate of severe radiation pneumonitis The diagnosis of radiation pneumonitis is established by a history of ... of China (30870738) We thank Drs Zhongxing Liao and Joe Y Chang of the University of Texas M D Anderson Cancer Center of Texas, USA for reviewing the manuscript Author Details Department of Radiation ... incidences of SARP in the group with V5 42% were 3% and 38%, respectively (p = 0.001) Schallenkamp suggested V10 and V13 to be the predictors of radiation pneumonitis risk The incidences of...

Ngày tải lên: 09/08/2014, 08:23

... al Radiation Oncology 2010, 5:40 http://www.ro-journal.com/content/5/1/40 Page of Table 1: Comparison of dosimetric parameters for irradiation of portal vein thrombosis and target volumes and ... Commission of Radiation Units and Measurements: ICRU 62 Bethesda, MD; 1999 Sheng K, Molloy JA, Read PW: Intensity-modulated radiation therapy (IMRT) dosimetry of the head and neck: a comparison of treatment ... interpretation of the study CHH drafted the manuscript CJ C, CCL, TEW, SCL, MJC and KHC took care of patients HCT, NSC and HJT made the treatment planning and carried out all plans comparisons and evaluations...

Ngày tải lên: 09/08/2014, 08:23

... article as: Ferrigno et al.: Comparison of conformal and intensity modulated radiation therapy techniques for treatment of pelvic tumors Analysis of acute toxicity Radiation Oncology 2010 5:117 Submit ... been published about use of IMRT in gynecological cancers [19,20,22], and [25], in rectal cancer [21] and in bladder cancer [12] All these studies showed a lower rate of radiation- induction toxicity ... a very uncomfortable symptom and can cause dehydration and malabsorption of vitamins, lactose, and bile acids [4] Another important finding was the higher absence of GI symptoms (grade 0) in IMRT...

Ngày tải lên: 09/08/2014, 09:20

... component of total DNA breakage, and that the inhibition of apoptosis allows for more proper estimation of radiation- induced DNA DSB repair and apoptosis itself First, we found spontaneous cleavage of ... for the determination of DNA double-strand breaks International journal of radiation biology 1989, 56:437-448 McMillan TJ, Tobi S, Mateos S, Lemon C: The use of DNA double-strand break quantification ... software, Bio-Rad) The sum of fluorescence within DNA smears was used for calculations and assessing differences in between experiments Determination of H2AX and activated caspase-3 by immunofluorescence...

Ngày tải lên: 09/08/2014, 09:20

... an SUV max of 6,0 and an maximum diameter of 1,6 cm The patient received IMRT irradiation of the pelvic lymph nodes to 45 Gy (five weekly fractions of 1,8 Gy) with a total boost dose of 66,6 Gy ... time of FEC-PET/CT scanning Open symbols denote SUVmax values of lymph nodes, closed squares those of the prostatic gland or fossa No correlation was found (R2 for combined data of prostate and ... volume In intermediate and high risk patients with primary disease, the prostate gland and seminal vesicles were included up to a maximum dose of 66,6 Gy In case of involvement of the seminal vesicles,...

Ngày tải lên: 09/08/2014, 09:20

... cell carcinomas and at least a 6-month interval between prior radiation and reirradiation (61 recurrences and 18 second primaries) The patients received a split-course regimen of radiation (total ... II study of low-dose paclitaxel and cisplatin in combination with split-course concomitant twice-dailyreirradiation in recurrent squamous cell carcinoma of the head and neck: results of Radiation ... was a median interval of 5.5 months for time to progression The 1-year and 2-year local control and overall survival rates for all patients were 51.2% and 30.7%, and 48.5% and 16.1%, respectively...

Ngày tải lên: 09/08/2014, 09:21

... collection of tissue samples and data AB participated in the conception of the study, BN assisted with the TMA construction and revision of the manuscript, UHS participated in revision of the manuscript, ... in the conception and design of the study, LBJ participated in the collection of tissue samples, data and revised the manuscript, KJ participated in the conception and design of the study, statistical ... Gaber et al.: Effects of radiation therapy on tissue and serum concentrations of tumour associated trypsin inhibitor and their prognostic significance in rectal cancer patients Radiation Oncology...

Ngày tải lên: 09/08/2014, 09:21

... II and III MPM, and the authors reported accuracy of 77% for CT, 86% for PET, 80% for Magnetic Resonance Imaging (MRI), and 100% for PET-CT in patients with stage II disease, and accuracy of ... because of significant toxicity concerns Linden et al treated 47 MPM patients with a dose of 40 Gy in 20 fractions with and without chemotherapy and they informed that all of patients experienced radiation ... help enormously in resolving the problems of overestimation and underestimation of GTV and mitigate their negative consequences for radiation management of tumors at many sites, including MPM We...

Ngày tải lên: 09/08/2014, 10:20