Abstract:
:Lacteous fat globules with their membranes from human milk and calostrum were studied by scanning and transmission electron microscopy. The first appear as spheroidal structures with some irregularities on the surface. Under the transmission electron microscope these irregularities are composed of islets from a material morphologically similar to cytoplasm, and with structures that resemble a fragment of rugose endoplasmic reticulum. The membranes in specimens fixed immediately after secretion are tri-layered, similar in appearance to those of a single membrane, but in samples fixed between two and four hours after secretion the details are unclear. Through freeze-etching, the laminar aspect of the fat globules is observed.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Hernández Fsubject
Has Abstractpub_date
1983-11-01 00:00:00pages
245-50issue
2eissn
0034-7744issn
2215-2075journal_volume
31pub_type
杂志文章abstract::Abstract: The phenotypic structure within and between plant populations is generally influenced by their distribution patterns in space and time; therefore, the study of their divergence is a central issue for the understanding of their microevolutive processes. We boarded the hypothesis that three populations of Espe...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v58i4.5410
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2013-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2017-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v56i2.5630
更新日期:2008-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2013-03-01 00:00:00
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journal_title:Revista de biologia tropical
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更新日期:2011-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2013-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2001-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:1984-11-01 00:00:00
abstract::Deforestation of tropical forests is threatening monkey biodiversity and their health status, dependent of an ecologically undisturbed area. To asses this relationship, we analyzed parasite occurrence in their intestines. The study was conducted at the Estación Biológica La Suerte (EBLS), Limón, Costa Rica. The group ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2010-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v56i2.5610
更新日期:2008-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章,评审
doi:
更新日期:1996-08-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2008-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v57i1-2.11324
更新日期:2009-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2008-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2001-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i1.18138
更新日期:2016-03-01 00:00:00
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journal_title:Revista de biologia tropical
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更新日期:1975-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2014-04-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2003-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2003-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v55i1.6073
更新日期:2007-03-01 00:00:00
abstract::Paulownia tomentosa is a fast-growing tree species with a considerable economic potential because of its value for wood as well as its high biomass production, and elevated stress tolerance. The objective of the present study was to evaluate the development of adventitious buds in leaves obtained from four-week-old sh...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2014-06-01 00:00:00
abstract::The Neotropical region exhibits the largest diversity of fish worldwide; however, little is known about the early development of fish species from this region. Therefore, to contribute to this knowledge, this study aimed to morphologically describe the early stages of development (eggs, larvae and juveniles) of S. pap...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v63i1.14121
更新日期:2015-03-01 00:00:00
abstract::Capturing small carnivores is often necessary for obtaining key ecological data. We compared the efficiency of box and leg-hold traps, using live and dead bait, to capture six carnivore species (Herpailurus yagouaroundi (E. Geoffroyi, 1803), Leopardus tigrinus (Schreber, 1775), Nasua nasua (Linnaeus, 1766), Cerdocyon ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v55i1.6083
更新日期:2007-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2000-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2006-12-01 00:00:00