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The Scope of Physics01:17

The Scope of Physics

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Physics is concerned with the interactions of energy, matter, space, and time, in order to discover the underlying mechanisms that underpin all phenomena. The word "physics" comes from the Greek word "phúsis", which means nature. Physics seeks to comprehend the natural world around us at its most fundamental level. It emphasizes the use of quantitative laws to do this, which could be valuable in other fields that want to push the performance boundaries of present...
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RNA-seq03:21

RNA-seq

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
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Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Chromatographic Resolution01:15

Chromatographic Resolution

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In chromatography, a solute moves through a chromatographic column and tends to spread, forming a Gaussian-shaped band. The longer the solute spends in the column, the broader the band becomes. The broadening can lead to overlaps within the column, affecting separation effectiveness.
The effectiveness of separation can be evaluated by determining the level of separation between two neighboring peaks in a chromatogram, which represents the individual components of a sample.
In chromatography,...
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Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Racemic Mixtures and the Resolution of Enantiomers02:30

Racemic Mixtures and the Resolution of Enantiomers

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A racemic mixture, or racemate, is an equimolar mixture of enantiomers of a molecule that can be separated using their unique interaction with chiral molecules or media. Racemic mixtures are denoted by the (±)- prefix. This ‘optical rotation descriptor’ applies to the whole solution of a racemic mixture rather than a specific stereoisomer. Enantiomers typically have the same physical and chemical properties. Hence, they are not easily separable. However, enantiomers can exhibit...
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Video Experimental Relacionado

Updated: Feb 12, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy
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Three-dimensional Optical-resolution Photoacoustic Microscopy

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Seq-Scope-eXpanded: ómicas espaciales más allá de la resolución óptica.

Angelo Anacleto1, Weiqiu Cheng2, Qianlu Feng3,4

  • 1Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, USA.

Nature communications
|February 10, 2026
PubMed
Resumen
Este resumen es generado por máquina.

Seq-Scope-X mejora la transcriptómica espacial (sST) mediante la expansión de los tejidos, logrando una resolución submicrométrica para el perfil de transcriptomas y proteomas completos. Este avance revela diferencias en los compartimentos celulares y funciones metabólicas dinámicas en varios tejidos.

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Área de la Ciencia:

  • Biología Molecular Biología Molecular
  • La genómica es la genómica.
  • Biología celular Biología celular.

Sus antecedentes:

  • La transcriptómica espacial basada en la secuenciación (sST, por sus siglas en inglés) ofrece un mapeo de la expresión génica de todo el transcriptoma.
  • Los métodos actuales de sST carecen de la resolución óptica de las técnicas de imágenes (200-300 nm).
  • Las limitaciones en la resolución dificultan el estudio detallado de las estructuras subcelulares y los patrones de expresión génica.

Objetivo del estudio:

  • Desarrollar un método mejorado de transcriptómica espacial con resolución submicrometrica.
  • Para superar las limitaciones de resolución de las técnicas sST existentes.
  • Para permitir el perfil de transcriptomas y proteomas enteros en tejidos de ultra alta resolución.

Principales métodos:

  • Introducción del Seq-Scope-X (Seq-Scope-eXpanded), una técnica que combina el Seq-Scope con la expansión del tejido.
  • Ampliación física de los tejidos para minimizar la difusión de transcripciones y aumentar la densidad de las características espaciales.
  • Aplicación en el hígado, el cerebro y los tejidos del colon, y adaptación a la proteómica espacial.

Principales resultados:

  • Seq-Scope-X alcanza una resolución submicrometrica, superando las limitaciones de los sST convencionales.
  • Los compartimentos nucleares y citoplasmáticos se resolvieron en casi todas las células del tejido hepático.
  • Se identificaron diferencias generalizadas en los patrones del transcriptoma nuclear frente al citoplasmático, lo que sugiere una conmutación metabólica dinámica en los hepatocitos.
  • Aplicación exitosa en los tejidos del cerebro y el colon, y adaptación a la proteómica espacial en el bazo y las amígdalas.

Conclusiones:

  • Seq-Scope-X es una poderosa plataforma para perfiles de transcriptomas y proteomas completos de ultra alta resolución.
  • El método expande significativamente la precisión espacial para el estudio de la arquitectura y la función celular.
  • Los hallazgos proporcionan nuevos conocimientos sobre la heterogeneidad celular y los mecanismos de la enfermedad en una resolución sin precedentes.