HYDROPROCESSING HEAVY OILS AND BITUMEN USING UD CATALYSTS: EFFECT OF THE FEEDSTOCK NATURE ON PRODUCT STABILITY Enzo Peluso and Pedro Pereira-Almao Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, Canada T2N 1N4 Introduction Technologies for upgrading heavy feedstocks can be divided into two general routes: (i) carbon rejection and (ii) hydrogen addition processes.1 Both routes have important limitations, and considerable effort have been committed to develop new technologies, or to improve existing ones, in order to process these unconventional oils which contain high amounts of coke precursor materials and contaminants.

FUNDAMENTAL AND APPUED TOXICOLOGY 5, 327-340 (1985) Downloaded from toxsci.oxfordjoumals.org at HAM-TMC Library on February 2, 2011 Chronic Inhalation of Short Asbestos Fibers1,23 S.

Toxicologic Pathology http://tpx.sagepub.com/ Asthma/Allergic Airways Disease: Does Postnatal Exposure to Environmental Toxicants Promote Airway Pathobiology?

REVISED (9/4/96) An Updated Mortality Study of Workers at a Petroleum Refinery in Beaumont, Texas Gerhard K.

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Risk Assessment and Child Health Jonathan M.

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Reproductive environmental health Patrice Sutton, Linda C.

Letters Scientists Appeal to Quebec Premier Charest to Stop Exporting Asbestos to the Developing World January 28, 2010 Dear Premier Charest: As scientists from 28 countries, ded icated to protecting public health, we appeal to you to respect the overwhelmingly consistent body of scientific evidence and the consid ered judgment of the World Health Organization (WHO) that all forms of asbestos have been shown to be deadly and that safe use of any form of asbestos has proven impos sible anywhere in the world.

Review Occupational Benzene Exposure and the Risk of Lymphoma Subtypes: A Meta-analysis of Cohort Studies Incorporating Three Study Quality Dimensions Jelle Vlaanderen,1 Qing Lan,2 Hans Kromhout,1 Nathaniel Rothman,2* and Roel Vermeulen1* 1Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands; 2Division of Cancer Epidemiology and Genetics, National Cancer Institute, Department of Health and Human Services, National Institutes of Health, Bethesda, Maryland, USA Background: The use of occupational cohort studies to assess the association of benzene and lymphoma is complicated by problems with exposure misclassification, outcome classification, and low statistical power.

392 Thepathogenesisofaplasticanaemia c C G G a r y , Royal Infirmary and Christie Hospital, Manchester ~ The association of fatty atrophy of haemopoietic although there is no doubt as to the association marrow with multiple cytopenias in the blood was fkst between this drug and marrow aplasia.