{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,20]],"date-time":"2025-09-20T18:37:13Z","timestamp":1758393433212},"reference-count":34,"publisher":"Cambridge University Press (CUP)","issue":"3","license":[{"start":{"date-parts":[[2007,3,9]],"date-time":"2007-03-09T00:00:00Z","timestamp":1173398400000},"content-version":"unspecified","delay-in-days":9078,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br J Nutr"],"published-print":{"date-parts":[[1982,5]]},"abstract":"<jats:p>1. Certain digestive and metabolic criteria were examined in mature wethers before and following (1) a simple exploratory laporotomy (two sheep), (2) establishment of a rumen cannula plus simple (\u2018T\u2019-shaped) cannulas in the duodenum and ileum (six sheep), (3) establishment of a rumen cannula plus two cannulas in the caecum (four sheep), (4) establishment of a rumen cannula plus re-entrant cannulus in the duodenum and ileum (four sheep) and (5) insertion of catheters into both external jugular veins (four sheep).<\/jats:p><jats:p>2. Metabolizability of a standard ration and nitrogen balance and rumen retention time of the sheep were not significantly changed by any of the surgical procedures carried out.<\/jats:p><jats:p>3. The amount of heat produced per unit metabolic weight of the sheep prepared with re-entrant cannulas increased significantly (21\u00b15\u00b76%; <jats:italic>P<\/jats:italic> &lt; 0\u00b7001).<\/jats:p><jats:p>4. The use of the different preparations in digestive and metabolic studies is discussed.<\/jats:p>","DOI":"10.1079\/bjn19820075","type":"journal-article","created":{"date-parts":[[2005,5,24]],"date-time":"2005-05-24T19:20:35Z","timestamp":1116962435000},"page":"637-644","source":"Crossref","is-referenced-by-count":12,"title":["Effects of gastrointestinal cannulation and jugular vein catheterization on the metabolism of sheep"],"prefix":"10.1017","volume":"47","author":[{"given":"J. C.","family":"Macrae","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. 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