𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Dehydrogenase activity as criterion for the determination of toxic effects on biological purification systems

✍ Scribed by G. Lenhard

Publisher
Springer
Year
1965
Tongue
English
Weight
366 KB
Volume
25
Category
Article
ISSN
1573-5141

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Effect of Surfactants and Related Biolog
Effect of Surfactants and Related Biological Active Substances on the O2/H2O2 Voltammetry and Its Utilization for Determination of the Total Surfactant Content
✍ Ladislav Novotný; Tomás˘ Navrátil 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 110 KB 👁 2 views

The effect of surfactants on the second voltammetric reduction peak of air oxygen dissolved in aqueous electrolyte solutions is described. Sodium dodecylbenzenesulfonate (DBSNa) was used as a model surfactant in the concentration range 9 × 10 ¹8 -9 × 10 ¹7 mol L ¹1 . With increasing DBSNa concentrat

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.
✍ Perdue, Adoline S. ;Bell, Frances ;Starnes, W.R. ;Hitchcock, Philip ;Teague, R.S 📂 Article 📅 1950 🏛 Elsevier ⚖ 346 KB 👁 1 views