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Am J Ind Med. Radon testing in households with a residential smoker - United States, — Centers for Disease Control.

Symbiotic Associations Between Termites and Prokaryotes

Introduction to health physics. Cember H, Johnson TE. The dose to the trachea and bronchi from the decay products of radon and thoron. Influence of radon daughter exposure at low doses on occurrence of lung cancer in rats. Radiation Protection Dosimetry. Combined effects of inhalation of radon daughter products and tobacco smoke. Pulmonary toxicology of respirable particles.

Oak Ridge, TN: U. Department of Energy; Lung carcinogenesis during in vivo cigarette smoking and radon daughter exposure in rats. Recent Results Cancer Res. Lesions and lung cancers induced in rats by inhaled radon at various equilibriums with radon daughters. In: Karbe E, Park J, editors. Experimental lung cancer.

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Carcinogenesis and bioassays. Cancers induced by Rn in the rat. Studies on atmospheric electrical conductivity related to radon and its progeny concentrations in the lower atmosphere at Mysore.

Atmos Environ. Mortality among workers in the Florida phosphate industry. J Occup Med. Bethesda, MD: U. National Library of Medicine; Radon and radon isotopes. January 26, Fluorine compounds of xenon and radon. PbPo tooth content and radon daughter exposure.

Relationship between the Pb content of teeth and exposure to Rn and Rn daughters. Risk assessment extrapolations and physiological modeling. Toxicol Ind Health.

Radon: Characteristics, natural occurrence, technological enhancement, and health effects. Prog Nucl Energy. Cohen BL. A national survey of Rn in U.

Particle deposition in human and canine tracheobronchial casts: A determinant of radon dose to the critical cells of the respiratory tract. A diffusion barrier charcoal adsorption collector for measuring Rn concentrations in indoor air. Lead concentrations in the bone, blood and excreta of a former uranium miner.

Lack of evidence for an association between the frequency of mutants or translocations in circulating lymphocytes and exposure to radon gas in the home.

An update on the NIST radon-in-water standard generator: its performance efficacy and long-term stability. Cumulative organ radioactivity concentrations of radon and its progeny following ingestion.

Journal of Nuclear Medicine. Cothern CR. In: Cothern C, Smith J, editors. Environmental radon. History and uses. Drinking-water contribution to natural background radiation. The biokinetics and dosimetry of radon in the human body following ingestion of ground water.

Environmental Geochemistry and Health. Cross FT. Radon inhalation studies in animals. Radiat Prot Dosim. Invited commentary: Residential radon risks from the perspective of experimental animal studies.

Comment on: Am J Epidemiol 4 Histopathologic, morphometric and physiologic investigation of lungs of dogs exposed to uranium ore dust. International conference on radiation hazards in mining.

Development of lesions in Syrian golden hamsters following exposure to radon daughters and uranium ore dust. Influence of radon daughter exposure rate and uranium ore dust concentration on occurrence of lung tumors.

Proceedings of the specialist meeting on the assessment of radon and daughter exposure and related biological effects. An overview of PNL radon experiments with reference to epidemiological data.

In: Thompson R, Mahaffey J, editors. Life-span radiation effects studies in animals: What can they tell us? Springfield, VA: U. Influence of radon daughter exposure rate, unattachment fraction, and disequilibrium on occurrence of lung tumours.

Carcinogenic effects of radon daughters, uranium ore dust and cigarette smoke in beagle dogs. Morphology of respiratory tract lesions in rats exposed to radon progeny. Damber L, Larsson LG. Combined effects of mining and smoking in the causation of lung carcinoma. Acta Radiol Oncol.

Radon in homes and risk of lung cancer: Collaborative analysis of individual data from 13 European case-control studies.

Comment in: BMJ ; Residential radon and lung cancer--detailed results of a collaborative analysis of individual data on persons with lung cancer and 14, persons without lung cancer from 13 epidemiologic studies in Europe.

Risk of lung cancer associated with residential radon exposure in south-west England: A case-control study. Comment in: Br J Cancer 79 Br J Cancer.

Physiological parameters in laboratory animals and humans. Pharmacology Research. Semen analyses among uranium miners. In: Wiese W, editor. Birth defects in the Four Corners area. Transcript of a meeting. Dobbin M. Deep breath down under. US News World Rep.

Model for assessing radiation dose to epithelial cells of the human respiratory tract from radon progeny. Washington, DC: U. NuDat 2. National Nuclear Data CenterU. SDepartment of Energy.

June 23, Eatough JP. Alpha-particle dosimetry for the basal layer of the skin and the radon progeny Po and Po.

Phys Med Biol. Radon and thoron associated dose to the basal layer of the skin. Personal monitoring of Po and Po radionuclide deposition onto individuals under normal environmental exposure conditions. Quantitative aspects of radon daughter exposure and lung cancer in underground miners.

Br J Ind Med. Human exposure. In vivo measurement of lead as an indicator of cumulative radon daughter exposure in uranium miners. Radiation dose to the human respiratory tract from inhalation of radon and its progeny. Appl Radiat Isot. Radiation poisoning; pp. Interim radon and radon decay product measurement protocols. By contrast, observations on river-influenced shelves indicate a high abundance of terrigenous material in sea ice and the potential for increasing DOC concentrations with sea-ice melting Eicken, ; Eicken et al.

The varying results of these studies suggest the impact of sea ice on DOM is region-dependent and warrants further study. With a few exceptions Anderson et al. It is less clear how DOM is distributed throughout the deep Arctic. Profiles of transient tracers e. Griffith et al. The observed variations in the age of water and DOC suggest that DOC could be degraded in the deep Arctic and may exhibit unique vertical concentration gradients absent in other ocean basins.

The primary objective of this study is to improve understanding of the sources, concentrations and distributions of DOM, and the processes that shape patterns of spatial and temporal variability. Sources of freshwater are quantified to examine the regional influence of meteoric water and sea-ice melt on DOM in polar surface waters. The patterns observed in Arctic surface waters are discussed in the context of climate-driven changes in circulation. Profile samples were collected at various depths 2— m at 17 stations using a rosette sampler equipped with 24 Niskin bottles and a Conductivity-Temperature-Depth CTD probe Sea-Bird SBE45 used to measure water salinity, temperature, and pressure.


Additional total silicon concentrations were measured on separate samples using an Agilent Inductively-coupled Plasma Mass Spectrometry at the University of South Florida, St. Petersburg, FL. Map of the study region and sampling locations in the western Arctic Ocean.

Original Research ARTICLE

Water samples were collected from the surface 8 m and depth profiles 2— m; denoted by numbers during three summer cruises in , , and The blue, red, and black dashed lines show the average sea-ice edge for September , , and , respectively. The broad spatial scale of sampling in this study covered a wide range of environments that varied substantially in sea-ice cover Figure 1.

Sea-ice area in the Arctic Ocean reached a low of 3. Comparisons in summer sea ice cover among , , and revealed a notable ice reduction in in the northern Chukchi Borderland, southern Mendeleev Plain, and the central and southern areas of the Canada Basin Figure 1. Milli Q water and deep-sea reference standards University of Miami were injected every 6th sample.In: Drake HL ed Acetogenesis. Indoor radon and lung cancer in China. Health Phys. Biol Bull — Google Scholar Cleveland LR Symbiosis among animals with special reference to termites and their intestinal flagellates.

Comment in: Health Phys 91 4 , author reply