A5042200978- Radiation Dose and Imaging
- Mass Spectrometry Techniques and Applications
- Aquatic Ecosystems and Phytoplankton Dynamics
- Radioactive contamination and transfer
- Advanced Radiotherapy Techniques
- Aquatic Invertebrate Ecology and Behavior
- Radioactivity and Radon Measurements
- Nuclear and radioactivity studies
- Nuclear Physics and Applications
- Oral and Maxillofacial Pathology
- Oil Spill Detection and Mitigation
- Marine Biology and Ecology Research
- Advanced X-ray and CT Imaging
- Marine Toxins and Detection Methods
- Risk Perception and Management
- Wind and Air Flow Studies
- Head and Neck Surgical Oncology
- Gas Sensing Nanomaterials and Sensors
- Coastal wetland ecosystem dynamics
- Soil and Water Nutrient Dynamics
- Physiological and biochemical adaptations
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Radiology practices and education
- Radiation Detection and Scintillator Technologies
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
2023-2024
NOAA National Marine Fisheries Service
2023-2024
Alaska Sea Grant
2023-2024
Moss Landing Marine Laboratories
2024
California State University, Monterey Bay
2024
University of Alaska Fairbanks
2023
University of Ottawa
2013
University of Kentucky
2012
Health Canada
2004-2011
Deep River Science Academy
2004
Abstract Background and Aims Coastal Alaska contains vast kelp habitat that supports diverse marine human communities. Over the past century, North Pacific Ocean has undergone oceanographic ecological regime shifts have potential to influence structure function of ecosystems strongly. However, remoteness complexity glacially carved region precludes regular monitoring efforts would be necessary detect such changes. Methods To begin fill this critical knowledge gap, we drew upon historical...
Biological responses to a formerly fi shless lake in the Cascade Range, Oregon (USA) were assessed through monitoring of recent changes and paleolimnological techniques assess earlier changes. We used un- published sheries reports, sediment cores, available unpublished water quality data evaluate lake. Diamond Lake has undergone four periods fiintroductions 20 th century. Rainbow trout (Salmo gairdneri) annually released from 1910-2006, except for 1949 1954. Tui chub (Gila bicolor), an...
This paper describes the radioactive poisoning episode in London 2006 and Health Canada response to locate test any Canadians who might have been contaminated by this event. The search strategies testing methods are explained results given. lessons learned summarised implications for vulnerable populations discussed. greatest public health impact was probably generation of fear concern, especially among those prone health-related anxiety disorders. groups individuals at risk were effectively...
RATIONALE An experimental Isobar Separator for Accelerator Mass Spectrometry (ISAMS) instrument has been used to demonstrate an on‐line separation of HfF 5 − from its isobar WF . This is necessary, in addition sample preparation chemistry, measuring 182 Hf at natural levels by (AMS). METHODS The device utilizes a radiofrequency quadrupole (RFQ) controlled gas cell, wherein anion‐gas reactions eV energies attenuate the interfering isobars analyte molecular anions, leaving AMS analysis. RFQ...
Children with a shunt for hydrocephalus often undergo multiple follow-up head CT scans, increasing the risk long-term effects of ionizing radiation. The study is to define conservative estimate frequent scans pediatric patients and quantify their cumulative radiation doses lifetime attributable developing cancer.All children at age less than 17 years who underwent non-enhanced tertiary hospital between 2007 2011 were identified categorized by total number per period as non-frequently (<3),...
Based on new scientific information and broad public consultation, the Government of Canada updated guideline for exposure to indoor radon launched a multi-year program in 2007. Major achievements accomplished past 3 y current activities underway are highlighted here.
Spontaneous CSF fistula through a congenitally fenestrated sphenoid bone.D J Quint, R Levy, Cornett, C Donovan and MarkertAudio Available | Share
To aid in protecting patients from unnecessary exposures and to reduce radiation burdens the public, a system for tracking patient's medical exposure history related doses would be useful tool. A patient-centred registry, Patient Exposure Registry (PER), is mechanism that provides this tracking. This article outlines objectives of proposed Canadian PER together with considerations preliminary design registry. Implementation strategy discussed. The will allow many initiatives progressing...
Blooms of Alexandrium catenella threaten to disrupt subsistence, recreational, and commercial shellfish harvest in Alaska, as the paralytic toxins (PSTs) produced pose a serious public health risk can lead costly shutdowns for farmers. Current methods PST detection region range from monitoring programs utilizing net tows detect A. direct tissue testing via mouse bioassay (MBA) aquaculture harvest, well various optional subsistence recreational harvesters. The efficacy feasibility these vary,...
Typically the bioassay method for 210Po in urine by alpha spectrometry (AS) involves wet decomposition of sample, which may cause a loss if volatile species are present. To test this hypothesis, samples collected from two rats that were i.v. administered with polonium citrate measured both AS and liquid scintillation counting, where mixed cocktail without any treatment. A split-plot design was used to compare results measurement methods, showing no evidence difference between methods. This...
Current practice for radiation protection associated with 131I therapy mainly focuses on external and internal exposure caused by physical contamination of the hospital staff, other patients family members. However, if volatile is excreted treated patients, these individuals could also be exposed through inhalation 131I. This study quantifies amount rats after intravenous administration metaiodobenzylguanidine (MIBG)-131I or Na131I, two most common forms therapy. The results indicate that in...
Purpose: CT tube current modulation (TCM) represents one of the most important and efficient methods for radiation dose reduction has been well accepted. However, possible influence clinical practice is likely to be ignored although venders may provide protocols instructions. This study designed further investigate quantitative effects operation, including radiograph direction patient positioning, on efficiency TCM by measuring image quality. Methods: An anthromorphologic chest phantom was...