Affordable Access

Publisher Website

The modulation of nitrate-enhanced hypothermia by sulphur compounds in cold-exposed sheep

Authors
Journal
Animal Feed Science and Technology
0377-8401
Publisher
Elsevier
Publication Date
Volume
39
Identifiers
DOI: 10.1016/0377-8401(92)90053-9
Disciplines
  • Design

Abstract

Abstract Four rumen fistulated wethers maintained on grass hay were used in a water bath test designed in a 4 × 4 Latin square. Nitrate (1.3 g NaNO 3 kg −0.75 body weight) was administered into the rumen without or with l-cysteine (0.21 g sulphur equivalent kg −0.75 body weight) or sulphide (0.105 sulphur equivalent kg −0.75 body weight) as a single dose 30 min after the morning feeding. Physiological saline was administered as control treatment. The water bath test was performed 2.75 h after administration of treatments by immersion of the animals in water at 38 °C and 18 °C. Respiratory gas exchange and metabolic rate were monitored by an open-circuit respiratory system during the water bath tests. Administration of nitrate without sulphur compounds induced an increase in methaemoglobin to 21% of total haemoglobin and a decrease in respiratory gas exchange and metabolic rate. Consequently, during exposure to 18 °C the rate of decrease in rectal temperature of the nitrate treated animal decreased at a two-fold rate of those on the saline treatment. Both l-cysteine and sulphide effectively counteracted the metabolic, Iterations induced by nitrate.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Enhanced responsiveness to insulin in sheep expose...

on The American journal of physio... April 1983

Quinine-induced hypothermia in cold-exposed rats.

on Pharmacology Biochemistry and... May 1977

Quinine-induced hypothermia in cold-exposed rats

on Pharmacology Biochemistry and... Jan 01, 1977

Insulin secretion in sheep exposed to cold.

on The Journal of Physiology September 1980
More articles like this..