𝔖 Bobbio Scriptorium

✦ LIBER ✦

Present state of and outlook for iron powder manufacture abroad

✍ Scribed by V. B. Akimenko; E. A. Krasheninnikov; V. V. Rukin; Zh. I. Dzneladze; Ya. L. Gipsh; L. Kh. Strokovskii; I. A. Gulyaev; G. L. Fridman

Book ID: 112489475
Publisher: Springer
Year: 1979
Tongue: English
Weight: 721 KB
Volume: 18
Category: Article
ISSN: 1573-9066
DOI: 10.1007/bf01159621

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📜 SIMILAR VOLUMES

A conference on the present state and fu

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A rapid procedure for the manufacture of

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✍ Martin, Lawell F. ;Prout, William A. 📂 Article 📅 1940 🏛 Elsevier ⚖ 275 KB 👁 1 views

Mining and metallurgical section: Stated

Mining and metallurgical section: Stated Meeting held Wednesday, February 9th, Mr. A. E. Outerbridge, Jr., in the chair. Mr. Paul Kreuzpointner, Testing Department, Pennsylvania Railroad, Altoona, Pa., read a paper entitled “The Practical Aspect of Present Methods of Testing Iron and Steel,” illustrated with the aid of lantern slides and specimen test-pieces. Discussed and referred for publication

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A study of the Assays of the Powdered Ex

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✍ Fricke, Howard H. ;Kaufman, K.L. 📂 Article 📅 1939 🏛 Elsevier ⚖ 436 KB 👁 2 views

Acute and Chronic Toxicity of Veratrum V

Acute and Chronic Toxicity of Veratrum Viride††The Veratrum viride studied was the whole-powdered drug marketed by Irwin, Neisler & Co. under the name, Vertavis. The work reported herein was supported by a grant from this firm. The batch of powder used in these experiments was stated by the manufacturer to have been assayed biologically by the Craw method on Daphnia magna. One Craw unit of the material studied was stated to be 15.6mg. With regard to this assay, Mr. R. O. Craw has been so kind as to allow us to publish a brief explanation: A reference lot of Yerolrum oirid; powder was set-aside as a standard and a 10% w/v aqueous extract was made of this powder. The average median length of life in 50 assays of 1000 daphnia on immersion in the solution was determined to be 2.22 hours. The daphnia were considered dead when the heart was found to be in systolic standstill on microscopic examination. Succeeding lots of powder were assayed and their potency determined by relating the median length of life of daphnia to 2.22 hours, which is one unit. Twenty assays of 10 animals each were used on each lot of powder.‡‡The authors wish to thank Dr. J. F. A.,McManus of the Department of Pathology for a pathologic report on the tissues, and Mr. James Thomas and Mrs. Bobby E. Teague for technical assistance.

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