Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

Videos de Conceptos Relacionados

The Fossil Record

The Fossil Record

The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...

Lampbrush Chromosomes

Lampbrush Chromosomes

In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops resemble the...

Microbial Morphologies

Microbial Morphologies

Bacterial and archaeal cells exhibit remarkable diversity in shape and structure, critical in their adaptability and functionality. Among bacteria, the most commonly observed shapes include cocci and bacilli. Cocci are spherical and may exist singly or in groupings such as pairs (diplococci), chains (streptococci), clusters (staphylococci), or tetrads. Bacilli, in contrast, are rod-shaped and can also occur as single cells, in pairs, or chains, depending on their environmental and genetic...

Diversity of Protists III

Diversity of Protists III

Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...

Evolution of Microbial Genome

Evolution of Microbial Genome

Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.

Microbial Mats

Microbial Mats

Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por

Same author

A ∼0.5 Myr perturbation of carbon and mercury cycles during the Middle Triassic biotic radiation.

Science advances·2026

Same author

Middle Cerebral Artery Doppler and Cerebroplacental Ratio Predict Adverse Neurological Outcomes in Fetal Growth Restriction.

Prenatal diagnosis·2026

Same author

Development and Validation of an In Vitro Ocular Irritation Test for Ophthalmic Medical Devices with a Novel Reconstructed Human Corneal Epithelium Model.

Bioengineering (Basel, Switzerland)·2026

Same author

Progesterone and IL-6 Expression Are Modulated by Follicular Fluid in Granulosa Cell Cultures.

Biomolecules·2025

Same author

Recovery from trauma after forced induction in paediatric anaesthesia through patient-centred care.

BMJ case reports·2025

Same author

Postural test to differentiate primary aldosteronism from low-renin hypertension: a retrospective single-center study.

Journal of endocrinological investigation·2025

Search research articles

Video Experimental Relacionado

Updated: May 10, 2026

Technique for Studying Arthropod and Microbial Communities within Tree Tissues

Technique for Studying Arthropod and Microbial Communities within Tree Tissues

Published on: November 16, 2014

Un micro mundo en el ámbar del Triásico.

Alexander R Schmidt¹, Eugenio Ragazzi, Olimpia Coppellotti

¹Museum für Naturkunde der Humboldt-Universität zu Berlin, 10115 Berlin, Germany. alexander.schmidt@museum.hu-berlin.de

|December 15, 2006

Resumen

El ámbar antiguo conserva microorganismos de hace 220 millones de años, revelando bacterias, hongos, algas y protozoos. Estos hallazgos muestran que las primeras redes alimentarias se han mantenido morfológicamente sin cambios durante millones de años.

Más Videos Relacionados

Processing Embryo, Eggshell, and Fungal Culture for Scanning Electron Microscopy

Processing Embryo, Eggshell, and Fungal Culture for Scanning Electron Microscopy

Published on: August 16, 2019

Microbiota of Attine Ants' Gardens: Visualizing a Microbial Landscape by Scanning Electron Microscopy

Microbiota of Attine Ants' Gardens: Visualizing a Microbial Landscape by Scanning Electron Microscopy

Published on: October 4, 2024

Videos de Experimentos Relacionados

Last Updated: May 10, 2026

Technique for Studying Arthropod and Microbial Communities within Tree Tissues

Technique for Studying Arthropod and Microbial Communities within Tree Tissues

Published on: November 16, 2014

Processing Embryo, Eggshell, and Fungal Culture for Scanning Electron Microscopy

Processing Embryo, Eggshell, and Fungal Culture for Scanning Electron Microscopy

Published on: August 16, 2019

Microbiota of Attine Ants' Gardens: Visualizing a Microbial Landscape by Scanning Electron Microscopy

Microbiota of Attine Ants' Gardens: Visualizing a Microbial Landscape by Scanning Electron Microscopy

Published on: October 4, 2024

Área de la Ciencia:

Paleontología Paleontología.
Microbiología Microbiología.
Geología Geología Geología.

Sus antecedentes:

El ámbar es un excelente medio para preservar los microorganismos.
Las inclusiones microbianas en ámbar de más de 135 millones de años de antigüedad son raras y previamente no documentadas.

Objetivo del estudio:

Para informar sobre el descubrimiento de microorganismos excepcionalmente conservados en ámbar de 220 millones de años.
Para investigar la paleoecología y la evolución de los microorganismos del Mesozoico Inferior.

Principales métodos:

Datación geológica de muestras de ámbar.
Análisis microscópico de las inclusiones dentro del ámbar.
Clasificación taxonómica de los microorganismos.

Principales resultados:

El descubrimiento de gotas de ámbar de 220 millones de años de antigüedad que contienen diversos microorganismos.
Identificación de bacterias, hongos, algas y protozoos que se pueden asignar a los géneros existentes.
La preservación de los microorganismos proporciona información sobre los ecosistemas terrestres del Mesozoico Inferior.

Conclusiones:

Los niveles basales de las redes alimentarias terrestres se han mantenido morfológicamente consistentes desde el Triásico hasta el presente.
Este descubrimiento ofrece una ventana única al antiguo mundo microbiano y su historia evolutiva.