{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T00:29:20Z","timestamp":1760920160744,"version":"build-2065373602"},"reference-count":19,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[1976,2,1]],"date-time":"1976-02-01T00:00:00Z","timestamp":191980800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Lipids"],"published-print":{"date-parts":[[1976,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Nonpolar lipids and sound velocity at different distances from the skin surface within a sample of pilot whale melon were studied. Thin layer chromatography, sensitive radioisotopic methods, and an ultrasonic echo scanner were used. Wax esters had a maximum concentration at 11\u201312 cm from the skin surface. Non\u2010 and monoisovalero triglycerides both exhibited a minimum at 8\u201310 cm, whereas the diisovalero species increased steadily from the skin surface towards the center of the pilot whale head. A minimum of sound velocity, ca. 1340 m\/s, was found at 9\u201311 cm, thus coinciding with a region rich in isovaleric acid esterified in wax and diisovalero triglycerides. These findings are compatible with predictions based on the known correlations between lipid structure and sound velocity. Consequently, additional evidence for refraction of sound in pilot whale melon is presented. This is important in understanding the system of echolocation of toothed whales.<\/jats:p>","DOI":"10.1007\/bf02532666","type":"journal-article","created":{"date-parts":[[2006,11,22]],"date-time":"2006-11-22T02:25:45Z","timestamp":1164162345000},"page":"153-156","source":"Crossref","is-referenced-by-count":23,"title":["Variations in lipid composition and sound velocity in melon from the North Atlantic pilot whale,<i>Globicephala melaena melaena<\/i>"],"prefix":"10.1002","volume":"11","author":[{"given":"Jonas","family":"Blomberg","sequence":"first","affiliation":[{"name":"Department of Medical Biochemistry, Faculty of Medicine University of G\u00f6teborg Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lars\u2010Erik","family":"Lindholm","sequence":"additional","affiliation":[{"name":"Department of Applied Electronics Chalmers School of Technology G\u00f6teborg Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[1976,2]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"329","volume-title":"\u201cMarine Bioacoustics,\u201d","author":"Norris K.A.","year":"1964"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF02534272"},{"key":"e_1_2_1_4_1","first-page":"674","volume":"6","author":"Litchfield C.","year":"1971","journal-title":"Ibid."},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/0005-2760(71)90158-5"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/0305-0491(75)90095-4"},{"key":"e_1_2_1_7_1","first-page":"6","volume-title":"PhD Thesis","author":"Margaillan L.","year":"1930"},{"key":"e_1_2_1_8_1","first-page":"1630","volume":"188","author":"Margaillan L.","year":"1929","journal-title":"Compt. Rend."},{"key":"e_1_2_1_9_1","unstructured":"Blomberg J. andB.N.Jensen 11th Congr. of the Int. Soc. for Fat Res. G\u00f6teborg Sweden June1972 Abstr. 223."},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00389480"},{"key":"e_1_2_1_11_1","unstructured":"Blomberg J. 11th Congr. of the Int. Soc. for Fat Res. G\u00f6teborg Sweden June1972 Abstr. 41."},{"key":"e_1_2_1_12_1","first-page":"135","volume-title":"\u201cD\u00fcnnschichtchromatographic,\u201d","author":"G\u00e4nshirt H.","year":"1967"},{"key":"e_1_2_1_13_1","doi-asserted-by":"publisher","DOI":"10.1021\/bi00820a020"},{"key":"e_1_2_1_14_1","first-page":"383","volume-title":"\u201cDer Ultraschall,\u201d","author":"Bergmann L.","year":"1954"},{"key":"e_1_2_1_15_1","first-page":"109","volume":"25","author":"Schaaffs W.","year":"1951","journal-title":"Ergeb. 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