Results 1 to 10 of about 20,614 (221)

Ray-finned fishes (Actinopterygii) from the Upper Jurassic (Oxfordian) of the Atacama Desert, Northern Chile [PDF]

open access: yesPeerJ, 2022
This contribution presents novel records of ray-finned fishes from the Oxfordian of Cerritos Bayos, northern Chile. This includes a Pachycormiformes diversity represented by macropredatory forms (aff. Hypsocormus sp.
Rodrigo A. Otero
doaj   +3 more sources

Cáncer de mama en seis familias del Tolima y el Huila: mutación BRCA1 3450del4 [PDF]

open access: yesBiomédica: revista del Instituto Nacional de Salud, 2020
Introducción. El cáncer de mama es un problema mundial de salud pública; entre el 5 y el 10 % de los casos presentan agregación familiar, lo que se explicaría por la presencia de mutaciones en genes de alto riesgo como el BRCA1 y el BRCA2.
Jennyfer Benavides   +9 more
doaj   +2 more sources

Taxonomía de los hongos: un rompecabezas al que le faltan muchas piezas [PDF]

open access: yesBiomédica: revista del Instituto Nacional de Salud, 2023
Los hongos son organismos polifacéticos presentes en casi todos los ecosistemas de la tierra, donde establecen diversos tipos de simbiosis con otros seres vivos. A pesar de ser reconocidos por los humanos desde la antigüedad –y de la cantidad de trabajos
Álvaro León Rúa-Giraldo
doaj   +2 more sources

Impact of dietary intervention and supplementation on the physiological profile of individuals with down syndrome [PDF]

open access: yesScientific Reports
Down syndrome, or trisomy 21 (T21), is a genetic neurodevelopmental disorder (NDD) often associated with various health challenges. In this population, physiological alterations remain poorly recognized, including dysregulated interactions among systems ...
Irving Hernández-Prior   +5 more
doaj   +2 more sources

Filogenia del reino Chromista

open access: yesRevista Sextante, 2019
La clasificación de los organismos vivos ha sido modificada numerosas veces, debido a que algunos grupos han sido difíciles de catalogar. Actualmente se reconocen siete reinos: Animalia, Plantea, Protozoa, Fungí, Archaea, Bacteria y Chromista.
Edy Luz Monterroza   +3 more
doaj   +2 more sources

New Paleogene records of cartilaginous fishes (Chondrichthyes) from central Chile, including the oldest lamnid diversity from the southeastern Pacific [PDF]

open access: yesPeerJ
Background The Paleogene chondrichthyan diversity of the southern hemisphere is mostly known in Antarctica, southernmost South America and New Zealand, but records from the southeastern Pacific remain sparse to date.
Rodrigo A. Otero
doaj   +3 more sources

Freud e a filogenia anímica [PDF]

open access: yesRevista Del Departamento De Psicología - UFF, 2007
Este ensaio investiga a presença, na obra de Freud, da idéia de uma filogenia anímica paralela, concomitante e dependente da filogenia somática descrita pelos teóricos da evolução. Objetivamos mostrar como se forma esta vizinhança da psicanálise com a biologia evolutiva, sublinhando que na filogenia esboçada por Freud, formas psíquicas típicas se ...
Monah Winograd
exaly   +3 more sources

The first embryo, the origin of cancer and animal phylogeny. I. A presentation of the neoplastic process and its connection with cell fusion and germline formation [PDF]

open access: yesFrontiers in Cell and Developmental Biology, 2023
The decisive role of Embryology in understanding the evolution of animal forms is founded and deeply rooted in the history of science. It is recognized that the emergence of multicellularity would not have been possible without the formation of the first
Jaime Cofre, Kay Saalfeld
doaj   +2 more sources

New cladotherian mammal from southern Chile and the evolution of mesungulatid meridiolestidans at the dusk of the Mesozoic era [PDF]

open access: yesScientific Reports, 2021
In the last decades, several discoveries have uncovered the complexity of mammalian evolution during the Mesozoic Era, including important Gondwanan lineages: the australosphenidans, gondwanatherians, and meridiolestidans (Dryolestoidea).
Agustín G. Martinelli   +8 more
doaj   +2 more sources

Filogenia, sistemática e entomologia prática: heteroptera (Hemiptera) [PDF]

open access: yesNeotropical Entomology, 1998
A aplicação do trabalho em sistemática e filogenética pode ter muitos efeitos práticos na entomologia aplicada. A filogenia é o estudo das relações evolucionárias dos organismos; a sistemática usa os resultados da filogenia para contrair sistemas de classificação.
exaly   +3 more sources

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