1. importsource = "00280836-2010-05-06.txt"
Se encontraron 120 resultados.
Artículo:

Designed biomaterials to mimic the mechanical properties of muscles

Autor:

Shanshan Lv

Resumen:

Here, artificial proteins are described that mimic the molecular architecture of titin — a protein that helps to govern the passive elastic properties of muscle. The new artificial proteins combine structured and unstructured domains, and can be photochemically crosslinked into a solid biomaterial that is resilient at low strains and extensible and tough at high strains. This provides an example of tailoring the macroscopic properties of a material through engineering at the single-molecule level

Página:

69

Publicación:

Nature

Volúmen:

464

Número:

7294

Periodo:

06 Mayo 2010

ISSN:

00280836

SrcID:

00280836-2010-05-06.txt

  • Documento número 307499
  • Actualizado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Creado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Enlace directo
Artículo:

Fast torsional waves and strong magnetic field within the Earth’s core

Autor:

Nicolas Gillet

Resumen:

The magnetic field inside the Earth's outer core cannot be directly probed. The intensity of the magnetic field at the core–mantle boundary is estimated to be 0.3 mT, and geodynamo models predict a value about ten times larger (3 mT) for the core's interior. Other data, however, indicate an internal field of only around 0.2 mT. This discrepancy has now been resolved: an ensemble inversion of core flow models finds a torsional wave recurring every 6 years, leading to an estimated field strength of around 4 mT inside the core

Página:

74

Publicación:

Nature

Volúmen:

464

Número:

7294

Periodo:

06 Mayo 2010

ISSN:

00280836

SrcID:

00280836-2010-05-06.txt

  • Documento número 307500
  • Actualizado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Creado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Enlace directo
Artículo:

Seismic and aseismic slip on the Central Peru megathrust

Autor:

Hugo Perfettini

Resumen:

Slip on a subduction megathrust can occur during an earthquake or aseismically. The size, location and frequency of earthquakes that a megathrust can generate depend on where and when aseismic creep is taking place, and what fraction of the long-term slip it accounts for. Here this issue is addressed by looking at the central Peru megathrust, and specifically at the Pisco earthquake of 2007. The findings show that aseismic creep accounts for 50–70% of the slip budget on the seismogenic portion of the megathrust

Página:

78

Publicación:

Nature

Volúmen:

464

Número:

7294

Periodo:

06 Mayo 2010

ISSN:

00280836

SrcID:

00280836-2010-05-06.txt

  • Documento número 307501
  • Actualizado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Creado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Enlace directo
Artículo:

Pronuclear transfer in human embryos to prevent transmission of mitochondrial DNA disease

Autor:

Lyndsey Craven

Resumen:

Mutations in mitochondrial DNA (mtDNA) are a common cause of human genetic disease. It has been shown in non-human primates that nuclear transfer techniques might be an approach to prevent the transmission of mtDNA mutations. The proof of principle has now been extended to human embryos. Pronuclei were transferred between human zygotes, which developed onwards to the blastocyst stage in vitro. Carry-over of mtDNA from the donor zygotes to the recipients was minimal

Página:

82

Publicación:

Nature

Volúmen:

464

Número:

7294

Periodo:

06 Mayo 2010

ISSN:

00280836

SrcID:

00280836-2010-05-06.txt

  • Documento número 307502
  • Actualizado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Creado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Enlace directo
Artículo:

Cis-interactions between Notch and Delta generate mutually exclusive signalling states

Autor:

David Sprinzak

Resumen:

Notch and Delta are transmembrane proteins that allow neighbouring cells to communicate during development. Here, quantitative time-lapse microscopy has been used to show that the response of Notch to Delta on a neighbouring cell is graded, whereas its response to Delta on the same cell is sharp and occurs at a fixed threshold. A mathematical model explores how this new design principle enhances the sharpness of developmental boundaries set by classical lateral inhibition

Página:

86

Publicación:

Nature

Volúmen:

464

Número:

7294

Periodo:

06 Mayo 2010

ISSN:

00280836

SrcID:

00280836-2010-05-06.txt

  • Documento número 307503
  • Actualizado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Creado el martes, 23 de mayo de 2017 03:58:16 p. m.
  • Enlace directo