Dr. David B Peakall

David Beaumont Peakall (17 March 1931 - 18 August 2001) was an internationally recognised Toxicologist. His research into the effects of DDE and DDT on eggshells contributed to the ban on DDT in the US. He proved that the chemicals caused thinning of eggshells, leading to a reduction in the population of various bird species. He also pioneered research on the effects of PCBs on birds. March 17 is the 76th day of the year (77th in leap years) in the Gregorian calendar. ... 1931 (MCMXXXI) was a common year starting on Thursday (link is to a full 1931 calendar). ... August 18 is the 230th day of the year (231st in leap years) in the Gregorian calendar. ... 2001 (MMI) was a common year starting on Monday of the Gregorian calendar. ... Toxicology (from the Greek words toxicon and logos) is the study of the adverse effects of chemicals on living organisms. ... Dichlorodiphenyldichloroethylene is the full name of DDE which is a breakdown product of DDT. The full name of this compound is 1,1-bis-(4-chlorophenyl)-2,2-dichloroethene, and this compound is formed by the loss of hydrogen chloride (dehydrohalogenation) of DDT 1,1-bis-(4-chlorophenyl)-2,2... DDT or Dichloro-Diphenyl-Trichloroethane is the first modern pesticide and is one of the best known synthetic pesticides. ... United States may refer to: Places: United States of America SS United States, the fastest ocean liner ever built. ... Labelling transformers containing PCBs Polychlorinated biphenyls (PCBs) are a class of organic compounds with 1 to 10 chlorine atoms are attached to biphenyl and a general structure of C12H10-xClx. ...

Early Years and Studies

David was born in Purley, Surrey, England and lived in Coulsdon, Surrey, as a boy. He demonstrated a keen interest in ornithology as well as chemistry, which led him to work as a volunteer at the RSPB reserve at Minsmere. He received a Ph.D. in Physical Chemistry in 1956 from the University of London, and a D.Sc. from Oxford University in 1979 for his thesis on the ecological effects of pollutants. He became a member of the American Ornithologists' Union in 1961 and an Elective Member in 1972. Purley is a place in the London Borough of Croydon. ... Not to be confused with Surry. ... Motto (French) God and my right Anthem God Save the King (Queen) England() – on the European continent() – in the United Kingdom() Capital (and largest city) London (de facto) Official languages English (de facto) Government Constitutional monarchy  -  Queen Queen Elizabeth II  -  Prime Minister Tony Blair MP Unification  -  by Athelstan 967  Area... Coulsdon is a place in the London Borough of Croydon on the Brighton Road (A23). ... Ornithology (from the Greek ornis = bird and logos = word/science) is the branch of zoology concerned with the scientific study of birds. ... It has been suggested that the central science be merged into this article or section. ... The Royal Society for the Protection of Birds (RSPB) is Europes largest wildlife conservation charity. ... RSPB Minsmere is a nature reserve, run by the RSPB, in Suffolk, England. ... Doctor of Philosophy (Ph. ... Physical chemistry is the application of physics to macroscopic, microscopic, atomic and particulate phenomena in chemical systems[1]within the field of chemistry traditionally using the principles, practices and concepts of thermodynamics, quantum chemistry, statistical mechanics and kinetics. ... 1956 (MCMLVI) was a leap year starting on Sunday of the Gregorian calendar. ... The University of London is a university based primarily in London. ... Sc. ... The University of Oxford, located in the city of Oxford in England, is the oldest university in the English-speaking world. ... For the song by the Smashing Pumpkins, see 1979 (song). ... A thesis (from Greek position) is an intellectual proposition. ... The American Ornithologists Union (AOU) an ornithological organization in the USA. Unlike the National Audubon Society, its members are primarily professional ornithologists rather than amateur birders. ... 1961 (MCMLXI) was a common year starting on Sunday (the link is to a full 1961 calendar). ... 1972 (MCMLXXII) was a leap year starting on Saturday. ...

Career

In 1960, Walter R. Spofford hired David as a research associate in the Department of Anatomy of the Upstate Medical Center in Syracuse, New York, where he used egg albumen protein electrophoresis to determine phylogenetic relationships in the Falconiformes. In 1962, he was appointed assistant professor of Pharmacology. In 1968, he went to Cornell University as a research affiliate at the Laboratory of Ornithology and a senior research associate in the Section of Ecology and Systematics in the Biological Sciences Division. He initially worked on making the Laboratory of Ornithology's Nest Record Card Program accessible to researchers. He also worked to emphasize the importance of spatial and temporal data on bird nesting. Human heart and lungs, from an older edition of Grays Anatomy. ... Clinton Square in Downtown Syracuse Syracuse is an American city in Central New York. ... NY redirects here. ... It has been suggested that Electrophoretic mobility be merged into this article or section. ... A phylogeny (or phylogenesis) is the origin and evolution of a set of organisms, usually of a species. ... Families Accipitridae Pandionidae Falconidae Sagittariidae The order Falconiformes is a group of about 290 species of birds that include the diurnal birds of prey. ... 1962 (MCMLXII) was a common year starting on Monday (the link is to a full 1962 calendar). ... A professor is a senior teacher and researcher, usually in a college or university. ... Pharmacology (in Greek: pharmakos (φάρμακον) meaning drug, and logos (λόγος) meaning science) is the study of how substances interact with living organisms to produce a change in function. ... 1968 (MCMLXVIII) was a leap year starting on Monday. ... Cornell University is a private university located in Ithaca, New York, USA. Its two medical campuses are in New York City and Education City, Qatar. ... Ornithology (from the Greek ornis = bird and logos = word/science) is the branch of zoology concerned with the scientific study of birds. ... This article or section does not cite any references or sources. ... Biological systematics is the study of the diversity of life on the planet earth, both past and present, and the relationships among living things through time. ... Biology studies the variety of life (clockwise from top-left) E. coli, tree fern, gazelle, Goliath beetle Biology is the science of life (from the Greek words bios = life and logos = word). ...

This led to David working full time on raptor pesticide problems, combining his passion for birds with his skills as a chemist. He measured DDE levels in Peregrine eggs collected in Alaska from 1969 to 1973, and showed a strong inverse relationship between DDE content and eggshell thickness. The chemical industry claimed that shell thinning occurred too rapidly after the introduction of DDT in 1946 for DDT to be the cause. David filled blown peregrine eggs collected from the critical period with solvent and measured DDE in the extracted lipids. DDE was present in sufficient concentrations to account for significant eggshell thinning in 1946 in Great Britain and as early as 1948 in California. Later, he would apply similar methods to California Condor eggshell fragments as evidence that this species was extremely sensitive to DDE. His testimony at U.S. congressional hearings contributed to the banning of DDT use in the United States. While at Cornell, David also conducted studies on the ability of pesticides to induce breakdown of steroids, to alter vitamin D metabolism and calcium up-take, and on the role of carbonic anhydrase and calcium ATPase in eggshell thinning. He also pioneered research on the effects of PCBs on birds. Look up raptor in Wiktionary, the free dictionary. ... A cropduster spreading pesticide. ... Dynamic Data Exchange (DDE) is an old technology for communication between multiple applications under Microsoft Windows and also OS/2. ... Peregrine Falcon Peregrine Investments Holdings Limited Peregrine Systems Peregrine is also a name and means wanderer This is a disambiguation page — a navigational aid which lists pages that might otherwise share the same title. ... Official language(s) none Capital Juneau Largest city Anchorage Area  Ranked 1st  - Total 663,267 sq mi (1,717,855 km²)  - Width 808 miles (1,300 km)  - Length 1,479 miles (2,380 km)  - % water 13. ... DDT or Dichloro-Diphenyl-Trichloroethane is the first modern pesticide and is one of the best known synthetic pesticides. ... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ... WARNING IF YOU HAVE SUFFERED A COLD YOU MAY BE AT RISK!!! So come on down to your local King Soopers and get Antiterscriperant for $100. ... In chemistry and biology, Steroids are a type of lipid, characterized by a carbon skeleton with four fused rings. ... Vitamin D is a fat soluble vitamin that contributes to the maintenance of normal levels of calcium and phosphorus in the bloodstream. ... A few of the metabolic pathways in a cell. ... General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Standard atomic weight 40. ... Carbonic anhydrase (carbonate dehydratase) is a family of metalloenzymes (enzymes that contain one or more metal atoms as a functional component of the enzyme) that catalyze the rapid interconversion of carbon dioxide and water into carbonic acid, protons, and bicarbonate ions. ... Calcium ATPase is a form of ATPase which transfers calcium after a muscle has contracted. ... Labelling transformers containing PCBs Polychlorinated biphenyls (PCBs) are a class of organic compounds with 1 to 10 chlorine atoms are attached to biphenyl and a general structure of C12H10-xClx. ...

In 1975 David went to Ottawa to become a research scientist and Chief of the Toxic Chemicals Division in the Canadian Wildlife Service (CWS) of Environment Canada. During his leadership, the contributions of the Division increased in magnitude and scope. To the existing strengths in analytical chemistry, field biology, pesticide registration and tissue banking, he added specialists in cytogenetics, heavy metals and biochemical toxicology, and a team to focus on the problems of fish-eating birds of the Great Lakes. He established an aviary and techniques to uncover the physiological mechanisms of pollutant effects observed in the field. He became an adjunct professor at the University of Ottawa. 1975 (MCMLXXV) was a common year starting on Wednesday. ... Motto: Advance Ottawa/Ottawa en avant Location of the City of Ottawa in the Province of Ontario Coordinates: Country Canada Province Ontario Established 1850 as Town of Bytown Incorporated 1855 as City of Ottawa Amalgamated January 1, 2001 Government  - Mayor Larry OBrien  - City Council Ottawa City Council  - Representatives 8... The Canadian Wildlife Service or CWS (French: Service canadien de la faune, SCF) is an agency of the Government of Canada, administered by the Department of the Environment, also known as Environment Canada. ... Environment Canada is the department of the government of Canada with responsibility for coordinating environmental policies and programs as well as preserving and enhancing the natural environment and conservation of wildlife. ... Analytical chemistry is the analysis of material samples to gain an understanding of their chemical composition and structure. ... A metaphase cell positive for the bcr/abl rearrangement using FISH Cytogenetics is the study of the structure of chromosome material. ... A heavy metal is any of a number of higher atomic weight elements, which has the properties of a metallic substance at room temperature. ... The Great Lakes from space The Great Lakes are a group of five large lakes in North America on or near the Canada-United States border. ... A professor is a senior teacher and researcher, usually in a college or university. ... For the university in Ottawa, Kansas, see Ottawa University. ...

David's major contribution to the Great Lakes gull work was an egg swap programme between "clean" and "dirty" colonies, to isolate the effect of parental behavior from that of embryo toxicity. He also participated in analyzing the effects on songbirds of spraying New Brunswick forests, fostered the long-term monitoring of contaminant residues in seabird eggs, and for many years was key to the success of the Research Advisory Board of the WWF-CWS Wildlife Toxicology Fund. David guided his scientific team in their collaborative investigations with CWS regional biologists on such problems as reproductive declines in falcons, effects of mercury and acid precipitation on loons and other waterfowl, and the effects of dioxin in pulp mill effluent on Great Blue Heron reproduction. From 1979 to 1985, he conducted his own extensive collaborative research program on the sub-lethal effects of oil on seabirds, working at the Mount Desert Island Biological Lab in Maine and Memorial University in Newfoundland. He retired from CWS in 1991, moving to Wimbledon, England, a few miles from his childhood home. Motto: Spem reduxit (Hope restored) BC AB SK MB ON QC NB PE NS NL YT NT NU Capital Fredericton Largest city Saint John Official languages English, French (the only constitutionally bilingual province in the country) Government - Lieutenant-Governor Herménégilde Chiasson - Premier Shawn Graham (Liberal) Federal representation in... General Name, Symbol, Number mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12, 6, d Appearance silvery Standard atomic weight 200. ... Acid rain is defined as rain with a pH of below 4. ... Species Gavia stellata Gavia arctica Gavia pacifica Gavia immer Gavia adamsii For other meanings of diver, also see diving. ... Space-filling model of 2,3,7,8- tetrachlorodibenzo-p-dioxin Structure of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) Dioxin is the popular name for the family of halogenated organic compounds, the most common consisting of polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzodioxins (PCDDs). ... Binomial name Ardea herodias Linnaeus, 1758 The Great Blue Heron, Ardea herodias, is a wading bird of the heron family Ardeidae, common all over North and Central America as well as the West Indies and the Galápagos, except in deserts and high mountains where there is no water for... For the song by the Smashing Pumpkins, see 1979 (song). ... 1985 (MCMLXXXV) was a common year starting on Tuesday of the Gregorian calendar. ... Mount Desert Island, in Hancock County, Maine, is one of the larger islands in the United States, being the third largest in the East after Long Island and Marthas Vineyard. ... Official language(s) None (English de facto; French is also an administrative language) Capital Augusta Largest city Portland Area  Ranked 39th  - Total 33,414 sq mi (86,542 km²)  - Width 210 miles (338 km)  - Length 320 miles (515 km)  - % water 13. ... Memorial University of Newfoundland, popularly known as MUN, is a comprehensive university located in St. ... For other uses, see Newfoundland (disambiguation). ... 1991 (MCMXCI) was a common year starting on Tuesday of the Gregorian calendar. ... Wimbledon (pronounced ) is a suburb of London, part of the London Borough of Merton and located seven miles (11. ...

Retirement

In retirement, David remained very active in the fields of toxicology and ornithology. For several years he was a visiting fellow at the University of Reading where he lectured in ecotoxicology, coauthored the widely acclaimed textbook Principles of Ecotoxicology, and in 1992 became a founding coeditor of the new and successful journal Ecotoxicology. In 1996, he coauthored Beyond Silent Spring, and helped to organize a U.S. Department of Energy-funded international workshop on "Nondestructive Biomarkers in Vertebrates." He organized at least two NATO-funded advanced workshops The University of Reading is a Red brick, campus university in the English town of Reading, UK. Established in 1892, receiving its Royal Charter in 1926, the University has a long tradition of research, education and training at a local, national and international level. ... 1992 (MCMXCII) was a leap year starting on Wednesday. ... 1996 (MCMXCVI) was a leap year starting on Monday of the Gregorian calendar, and was designated the International Year for the Eradication of Poverty. ... NATO 2002 Summit in Prague. ...

Personal life

David's interests included cooking, literature, travel and art, and a love of cricket. He enjoyed birding and attending cricket matches; he was a life-long Surrey supporter. Bowler Shaun Pollock bowls to batsman Michael Hussey. ... Surrey County Cricket Club (SCCC) is an English first-class cricket team, based at The Oval cricket ground in south London. ...

Death

David became ill in early August 2001. He died on 18 August 2001 in London. For other uses, see August (disambiguation). ... 2001 (MMI) was a common year starting on Monday of the Gregorian calendar. ... August 18 is the 230th day of the year (231st in leap years) in the Gregorian calendar. ...