SciELO - Scientific Electronic Library Online

 
vol.89 issue2Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, BrazilWater temperature, body mass and fasting heat production of pacu (Piaractus mesopotamicus) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Anais da Academia Brasileira de Ciências

Print version ISSN 0001-3765On-line version ISSN 1678-2690

Abstract

BARBOSA, MARCÍLIA M. et al. Evaluation of methods for the quantification of ether extract contents in forage and cattle feces. An. Acad. Bras. Ciênc. [online]. 2017, vol.89, n.2, pp.1295-1303.  Epub Apr 27, 2017. ISSN 0001-3765.  https://doi.org/10.1590/0001-3765201720160708.

The objective of this study was to compare the estimates of ether extract (EE) contents obtained by the Randall method and by the high-temperature method of the American Oil Chemist's Society (AOCS; Am 5-04) in forages (n = 20) and cattle feces (n = 15). The EE contents were quantified by using the Randall extraction or AOCS method and XT4 filter bags or cartridges made of qualitative filter paper (80 g/m²) as containers for the samples. It was also evaluated the loss of particles, and concentration of residual chlorophyll after extraction and the recovery of protein and minerals in the material subjected to extraction. Significant interaction was observed between extraction method and material for EE contents. The EE estimates using the AOCS method were higher, mainly in forages. No loss of particles was observed with different containers. The chlorophyll contents in the residues of cattle feces were not affected by the extraction method; however, residual chlorophyll was lower using the AOCS method in forages. There was complete recovery of the protein and ash after extraction. The results suggest that AOCS method produces higher estimates of EE contents in forages and cattle feces, possibly by providing greater extraction of non-fatty EE.

Keywords : crude fat; feed analysis; filter bags; non-polar compounds.

        · text in English     · English ( pdf )