28 research outputs found
Health Hazard Evaluation Report: HETA-91-0246-2354: Dimond Ice Chalet; Anchorage, Alaska
No full textIn response to a request from the Anchorage, Alaska Health Department, an evaluation was made of health effects among emergency responders exposed to a CFC-22 (75456) release at the ice-skating rink (SIC-7999) in the Dimond Center shopping mall. The 24-year-old assistant manager of the rink died of asphyxiation while trying to stop a refrigerant leak inside a compressor room. Two other workers lost consciousness and were resuscitated. Two members of an adjoining health club were overcome while swimming in the pool. Possible health effects were investigated in 106 individuals who were in the building during the incident. Emergency responders and other individuals who were in the mall reported symptoms, including lightheadedness, dizziness, eye/nose/throat irritation, headache, giddiness, and weakness. The author concludes that a fatal hazard existed at the Dimond Ice Chalet at the time of the incident. The author recommends measures for employers who operate CFC type refrigeration systems, including a periodic maintenance program, a hazard communication program, the posting of confined spaces, engineering controls, a comprehensive respirator program, and a comprehensive emergency action plan
Kakim obrazom D'artan'ân prevratilsâ v Žana Dartova?
Get PDFIren Rozdobudko, a contemporary Ukrainian writer wrote her novel Milday’s Last Dimond in 2002. The novel was planned to be the continuation o f Alexander Dumas’ well-known novel The Three Musketeers, with the aim to rehabilitate Milady. In her writings the author plays extensively with the names of her heroes. The literary onomastics of Iren Rozdobudko’s detective story Milady ’s Last Dimond reveals the functions of the proper names in the literary text as well as Rozdobudko’s naming strategy
Effect of vasopressin on sodium excretion and plasma antinatriferic activity in the dog
No full text Vasopressin (VP) was administered for 1 h intravenously to hydropenic, anesthetized dogs in doses of 1.0-1.25 mU/kg per min. In 14 experiments, sodium excretion (UNA V) increased from a mean of 13 +/- 5 to a peak of 96 +/- 21 mueq/min 40 min after beginning infusion (P less than .001). Urine flow and potassium excretion increased from 0.18 +/-.04 ml/min and 20 +/- 2 meuq/min to peak values of 0.6 +/- .08 ml/min and 61 +/- 9 mueq/min, respectively (P less than .001), with no significant increase in glomerular filtration rate. No significant changes in UNA V occurred in eight sham control experiments of in six experiments in which VP was given at 75 muU/kf per min. To test the hypothesis that VP might be natriuretic indirectly by releasing a natriuretic substance, plasms ultrafiltrates were tested for toad bladder antinatriferic activity(AA). During steady-state control, AA was -10 +/- 3%. Thirty and sixty minutes after beginning VP, AA increased to -24 +/- 3% (P less than .05) and -26 +/- 2% (P less than .001), respectiviely. No significant change in plasma AA occurred in either sham controls or in animals given the subnatriuretic VP dose. Incubation of plasma with 1,000 muU/ml VP caused no increase in AA. The data show that VP natriuresis is accompanied by an increase in plasms AA. The results suggest that vasopressin natriuresis in hydropenic dogs at least in part to the release of a humoral inhibitor of renal tubular sodium transport. </jats:p
The Press Secretary: a role study
No full textThesis (M.S.)--Boston UniversityPLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at [email protected]. Thank you.2999-01-0
Prescribing by mental health nurses: the UK perspective
No full textPURPOSE. This article aims to discuss the growth of mental health nurse (MHN) prescribing in the United Kingdom as an exemplar for readers to compare progress in their own countries and context. This study also aims to provide a historical overview of this process in the United Kingdom where MHNs prescribe safely and competently.
CONCLUSIONS. Finally, evidence has shown that MHNs with prescriptive authority are competent when prescribing when compared to psychiatrists.
PRACTICE IMPLICATIONS. Despite organizational barriers and educational concerns, MHN prescribing is becoming embedded in the healthcare context in the United Kingdo
Temporal variation in the symbiosis and growth of the temperate scleractinian coral Astrangia poculata
Get PDFAuthor Posting. © Inter-Research, 2007. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 348 (2007): 161-172, doi:10.3354/meps07050.Seasonal variation in the algal symbiosis and growth of Astrangia poculata, a facultatively symbiotic temperate scleractinian, was explored in Rhode Island, USA. Coral pigmentation and growth were measured simultaneously and repeatedly in both zooxanthellate (corals with symbionts) and azooxanthellate (symbiont free) colonies at 2 sites (~10 km apart) over a 15 mo period using non-destructive digital image analysis methods. A chlorophyll density proxy based on coral pigmentation was derived from multivariate analysis of color data from coral images, and polyps were enumerated to measure colony growth. Among zooxanthellate corals, predicted chlorophyll density exhibited significant seasonal fluctuations that were positively related to temperature, with maxima occurring during late summer and early autumn. Pigmentation dynamics in azooxanthellate corals were more variable, although many of these corals displayed temporal fluctuations in pigmentation. Growth also exhibited seasonal fluctuations positively related to temperature, and ceased during the coldest 3 to 4 mo of the year. Corals lost live polyps during the winter as a result of tissue thinning and dormancy, which rendered the colony unable to fend off settling organisms. Although zooxanthellate colonies were able to grow faster than azooxanthellate colonies, coral pigmentation explained only 23% of the variation in growth rate, emphasizing the importance of heterotrophy as the primary source of nutrition for A. poculata at this northern margin of its range.This study
was supported by an American Academy of Underwater
Sciences student scholarship to J.D., as well as by the URI
Department of Biological Sciences, and National Science
Foundation grants to E.C
A Preliminary Note on Egg Production from Milk-Fed Mosquitoes
Get PDFAuthor Institution: Department of Zoology and Entomology, The Ohio State University, Columbus 1
A Preliminary Note on Some Nutritional Requirements for Reproduction in Female Aedes Aegypti
Get PDFAuthor Institution: Department of Zoology and Entomology, The Ohio State University, Columbus 1
Three Perspectives on Multilevel Selection: An Experimental, Historical, and Synthetic Analysis of Group-Level Selection
Get PDFabstract: During the 1960s, the long-standing idea that traits or behaviors could be
explained by natural selection acting on traits that persisted "for the good of the group" prompted a series of debates about group-level selection and the effectiveness with which natural selection could act at or across multiple levels of biological organization. For some this topic remains contentious, while others consider the debate settled, even while disagreeing about when and how resolution occurred, raising the question: "Why have these debates continued?"
Here I explore the biology, history, and philosophy of the possibility of natural selection operating at levels of biological organization other than the organism by focusing on debates about group-level selection that have occurred since the 1960s. In particular, I use experimental, historical, and synthetic methods to review how the debates have changed, and whether different uses of the same words and concepts can lead to different interpretations of the same experimental data.
I begin with the results of a group-selection experiment I conducted using the parasitoid wasp Nasonia, and discuss how the interpretation depends on how one conceives of and defines a "group." Then I review the history of the group selection controversy and argue that this history is best interpreted as multiple, interrelated debates rather than a single continuous debate. Furthermore, I show how the aspects of these debates that have changed the most are related to theoretical content and empirical data, while disputes related to methods remain largely unchanged. Synthesizing this material, I distinguish four different "approaches" to the study of multilevel selection based on the questions and methods used by researchers, and I use the results of the Nasonia experiment to discuss how each approach can lead to different interpretations of the same experimental data. I argue that this realization can help to explain why debates about group and multilevel selection have persisted for nearly sixty years. Finally, the conclusions of this dissertation apply beyond evolutionary biology by providing an illustration of how key concepts can change over time, and how failing to appreciate this fact can lead to ongoing controversy within a scientific field.Dissertation/ThesisDoctoral Dissertation Biology 201
High patient doses in interventional cardiology due to physicians' negligence: How can they be prevented?
No full textInterventional cardiology procedures are usually associated with high patient doses and even deterministic radiation effects may occur. Expensive digital flat panels are preferably used to lower doses, and Athens General Hospital has recently installed one. However, this study shows that it is the cardiologists' practice that lowers patients' doses. Doses delivered to patients during two time periods (pre and after radiation protection training) on a total of 1196 coronary angiographies and 506 percutaneous transluminal coronary angioplasties were measured and analysed per cardiologist. Local reference levels (LRLs) were assessed and compared with the preliminary RLs provided by the European Research Program DIMOND. Results showed that although after the training patients' dose area product, fluoroscopy time, cumulative dose and number of images acquired were lowered, the situation remained unchanged for the cardiologist who delivered the highest doses. The question to answer next is how this bad practice can be prevented since no dose constraints apply to diagnostic or therapeutic procedures using ionising radiation. © The Author 2008. Published by Oxford University Press. All rights reserved
