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Dive into the research topics where Geoffrey Woodard is active.

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Featured researches published by Geoffrey Woodard.


Advances in food research | 1951

The pharmacological evaluation of antioxidants.

Arnold J. Lehman; O.G. Fitzhugh; Arthur A. Nelson; Geoffrey Woodard

Publisher Summary This chapter presents a general plan for the pharmacological investigation, which permits a thorough appraisal of the toxicology of an antioxidant. Many compounds have been found to possess antioxidant properties, the more common compounds being gum guaiac, gallic acid, catechol, and hydroquinone. Naturally occurring antioxidants have received considerable attention, the purpose being to develop a nontoxic substance suitable for food use. Lecithin, cephalin, tocopherols, and products obtained from cereals, yeasts, sugars, and other food substances have been proposed. The criteria that are considered necessary for establishing the usefulness of a chemical as an antioxidant have been listed. Of the many chemicals proposed for antioxidant use and under active investigation, available pharmacological data on the compounds have been listed. The chapter tabulates a summary of the acute toxicity of the antioxidants. Chronic studies on propyl gallate have been conducted in animals such as guinea pigs and dogs, and lifetime feeding studies in rats have been carried out. The predominant pathologic lesions produced by the various antioxidants after lifetime feeding to rats have been summarized.


Chemical & Engineering News | 2010

Summary of Toxicological Studies of the Insecticide DDT

John H. Draize; Geoffrey Woodard; O. Garth Fitzhugh; Arthur A. Nelson; R. Blackwell Smith; Herbert O. Calvery

PRESENTED here is a brief resume of the toxicological studies in this laboratory of the synthetic insecticide DDT ( 1 ). Detailed reports of these investigations will appear elsewhere ( 2, 3, 4 )· Experiments to determine the toxicity and action of DDT have been carried out along the following lines: Acute and subacute application to the akin of rabbits, rats, guinea pigs, and dogs. Acute and subacute feeding to rats, mice, guinea pips, and chicks. Chronic feeding to rats and dogs. Skin irritation and sensitization. Pharmacological investigations as to the site and mode of action. Gross and microscopic pathology and blood studies of poisoned animals. Skin Application Solid. DDT in micronized powder form did not penetrate the intact rabbit skin sufficiently to produce signs of toxicity or irritation, perhaps because of the insoluble nature of this compound. Solution. When DDT in 30% solution in dimethyl phthalate was applied in single doses of 3.9, 6.0, and 9.4 ml. per ...


Archive | 1956

Allgemeines über die Giftigkeit von Lebensmittel-Zusätzen

Arnold J. Lehman; Wilbur I. Patterson; Bernard Davidow; Ernest C. Hagan; Geoffrey Woodard; Edwin P. Laug; John P. Frawley; O. Garth Fitzhugh; Anne R. Bourke; John H. Draize; Arthur A. Nelson; Bert J. Vos

Die Menschheit ware langst ausgerottet, wenn der Organismus nicht die Fahigkeit besase, auch mit den meisten Giften fertig zu werden. Unsere Literaten bringen das gern zusammen mit der vielgeruhmten „Zahigkeit des Menschengeschlechts“, worunter zu verstehen ware, wenn etwa jemand besondere korperliche oder seelische Strapazen auf sich nehmen kann, ohne zu erkranken, oder wenn er wider Erwarten eine lebensgefahrliche Krankheit ubersteht. Diese Zahigkeit zeigt sich aber nicht darin, das etwa ein beruhmter Fusballspieler oder ein sonst notorisch zaher Mensch der Erkrankung entgehen wurde, wenn man ihm das Virus der infektiosen Gelbsucht einimpft. Die Zahigkeit im besonderen Fall einerVergiftung besteht nur darin, das in einem groseren Kollektiv von Menschen der empfindliche Mensch — der nicht der schwachliche Mensch zu sein braucht — eine kleinere Dosis dieses Giftes, der unempfindliche Mensch — der im ubrigen stark oder schwachlich sein kann — eine grosere Dosis notig hat, damit eine bestimmte Schadigung gesetzt wird; wird die Dosis genugend gesteigert, so kommen sie alle ums Leben, Zahe und Verweichlichte, Alte und Junge, Gesunde und Kranke, ebenso wie die Atomenenergie sich um diese Zahigkeit des Menschengeschlechts nicht viel kummert.


Journal of Pharmacology and Experimental Therapeutics | 1944

METHODS FOR THE STUDY OF IRRITATION AND TOXICITY OF SUBSTANCES APPLIED TOPICALLY TO THE SKIN AND MUCOUS MEMBRANES

John H. Draize; Geoffrey Woodard; Herbert O. Calvery


Journal of the National Cancer Institute | 1953

Tumors of the urinary bladder, gall bladder, and liver in dogs fed o-aminoazotoluene or p-dimethylaminoazobenzene.

Arthur A. Nelson; Geoffrey Woodard


Journal of Pharmacology and Experimental Therapeutics | 1948

Toxicological investigations of compounds proposed for use as insect repellents.

John H. Draize; Elsie Alvarez; Marie F. Whitesell; Geoffrey Woodard; E. Conway Hagan; Arthur A. Nelson


Industrial & Engineering Chemistry | 1948

Metabolism of Chlorinated Hydrocarbon Insecticides

Geoffrey Woodard; Bernard Davidow; Arnold J. Lehman


Journal of Pharmacology and Experimental Therapeutics | 1950

ABSORPTION, DISTRIBUTION, AND EXCRETION OF SODIUM FLUOROACETATE (1080) IN RATS

Ernest C. Hagan; L. L. Ramsey; Geoffrey Woodard


Journal of Nutrition | 1948

The Toxicity of Flours Treated with Various “Improving” Agents

Jack L. Radomski; Geoffrey Woodard; Arnold J. Lehman


Journal of Pharmacology and Experimental Therapeutics | 1944

ACUTE AND SUBACUTE TOXICITY OF DDT (2,2,-bis(p-CHLOROPHENYL)-1,1,1-TRICHLOROETHANE) TO LABORATORY ANIMALS

Geoffrey Woodard; Arthur A. Nelson; Herbert O. Calvery; Virginia D. Johnson; Diana S. Kramer; Paul M. Jenner

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Arthur A. Nelson

Food and Drug Administration

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Arnold J. Lehman

Food and Drug Administration

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Herbert O. Calvery

Food and Drug Administration

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Jack L. Radomski

Food and Drug Administration

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O. Garth Fitzhugh

Food and Drug Administration

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Anne R. Bourke

Food and Drug Administration

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Bernard Davidow

Food and Drug Administration

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Edwin P. Laug

Food and Drug Administration

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Ernest C. Hagan

Food and Drug Administration

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John P. Frawley

Food and Drug Administration

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