Geomagnetic field strength 3.2 billion years ago recorded by single silicate crystals
Article Abstract:
A C[O.sub.2] laser heating approach along with direct-current SQUID magnetometer measurements is used to obtain palaeodirections and intensities from single silicate crystals that host magnetic inclusions. 3.2-Gyr-old field strengths that are within 50% of the present-day value indicate that a viable magnetosphere sheltered the early Earth's atmosphere from solar wind erosion.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
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Weighing of biomolecules, single cells and single nanoparticles in fluid
Article Abstract:
An analysis to demonstrate that suspended microchannel resonators weigh single nanoparticles, single bacterial cells and sub-monolayers of absorbed proteins in water with sub-femtogram resolution is conducted. It is observed that viscous loss due to the fluid is negligible as compared to the intrinsic damping of silicon crystal resonator.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
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Structural and temporal requirements for geomagnetic field reversal deducted from lava flows
Article Abstract:
A study proposes that the older lavas record the onset of a geodynamo process, which only on occasion would result in polarity change. The result reveals that complete reversals require a significant period for magnetic flux to escape from the solid inner core and sufficiently weaken its stabilizing effect.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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