𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Studies on the transition to ureotelism in the earthwormLumbricus terrestris L.

✍ Scribed by Tillinghast, Edward K. ;Janson, Colette H.

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
396 KB
Volume
177
Category
Article
ISSN
0022-104X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The hypothesis that anatomically distinct endocrine centers control the production of urea and ammonia in the earthworm has been examined.

This hypothesis is not supported by the present data.

Ammonia output is markedly increased by a high protein diet, while the urea output is reduced by digestible carbohydrates.

📜 SIMILAR VOLUMES

Excretory pathways of ammonia and urea i
Excretory pathways of ammonia and urea in the earthwormLumbricus terrestris L.
✍ Tillinghast, Edward K. 📂 Article 📅 1967 🏛 John Wiley and Sons 🌐 English ⚖ 556 KB

the gut, while urea is voided via the nephridia. discussed. 1. The earthworm Lumbrkus terrestris voids ammonia principally via 2. The possible significance of these separate pathways for nitrogenous wastes is

The influence of ammonia on the transiti
The influence of ammonia on the transition to ureotelism inXenopus laevis
✍ Janssens, P. A. 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 737 KB

## Abstract Toads of the species __Xenopus laevis__ were immersed in 5 mM NH~4~Cl or 5 mM NaCl for periods of up to 28 days. In stronger solutions of NH~4~Cl, toads died within one hour. The rate of excretion of ammonia and urea and the activities of carbamyl phosphate synthetase, ornithine transca

Branchial and branchiostegite carbonic a
Branchial and branchiostegite carbonic anhydrase in decapod crustaceans: The aquatic to terrestrial transition
✍ Henry, Raymond P. 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 869 KB

## Abstract Carbonic anhydrase (CA) activity was measured in the gills, branchiostegite, and cuticle of 5 species of decapod crustaceans displaying fully aquatic, semi‐terrestrial, and fully terrestrial lifestyles. Density‐gradient and differential ultracentrifugation were used to separate 2 subcel

Ultrasonic absorption studies of poly-be
Ultrasonic absorption studies of poly-benzyl-L-aspartate in mixed solvents, in relation to the helix–coil transition
✍ R. Zana; J. Lang 📂 Article 📅 1973 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 504 KB

## Abstract Ultrasonic absorption measurements were carried out on solutions of polybenzyl‐L‐aspartate (PBLA) in chloroform–dichloroacetic acid (DCA) and in 1,2‐dichloroethane (DCE)–DCA, in the range 3.9–155 MHZ. The helix–coil transition of PBLA produces an increase of absorption which is larger i