Publications by authors named "E G Blackman"
A lunar core dynamo limited to the Moon's first ~140 million years.
Commun Earth Environ
September 2024
Article Synopsis
- The study of single crystal paleointensity (SCP) indicates that the Moon did not have a sustained core dynamo, with some Apollo basalts suggesting an episodic dynamo instead.
- Analysis of ancient Apollo basalts reveals they record unrealistic magnetization levels and indicate null magnetic fields, implying they do not support the idea of a long-lasting lunar dynamo.
- The findings suggest that the lunar surface may contain evidence of Earth's early atmosphere, potentially trapped in regolith, making it a valuable location for future research.
Understanding magnetic field growth in astrophysical objects is a persistent challenge. In stars and galaxies, turbulent flows with net kinetic helicity are believed to be responsible for driving large-scale magnetic fields. However, numerical simulations have demonstrated that such helical dynamos in closed volumes saturate at lower magnetic field strengths when increasing the magnetic Reynolds number Rm.
View Article and Find Full Text PDFKAR4, the yeast homolog of the mammalian mRNA N6A-methyltransferase complex component METTL14, is required for two disparate developmental programs in Saccharomyces cerevisiae: mating and meiosis. To understand KAR4's role in yeast mating and meiosis, we used a genetic screen to isolate 25 function-specific mutant alleles, which map to non-overlapping surfaces on a predicted structure of the Kar4 protein (Kar4p). Most of the mating-specific alleles (Mat-) abolish Kar4p's interaction with the transcription factor Ste12p, indicating that Kar4p's mating function is through Ste12p.
View Article and Find Full Text PDFArticle Synopsis
- The study discusses experiments using pulsed-power to create differentially rotating plasmas, mimicking conditions found in astrophysical disks and jets.
- Angular momentum is introduced through ablation flows from a wire array, rather than boundary forces, leading to a plasma jet that rotates upwards.
- The jet exhibits subsonic rotation with a velocity of around 23 km/s and shows a quasi-Keplerian velocity profile, completing up to two rotations in about 150 nanoseconds.
Unlabelled: , the yeast homolog of the mammalian mRNA N A-methyltransferase complex component , is required for two disparate developmental programs in : mating and meiosis. To understand 's role in yeast mating and meiosis, we used a genetic screen to isolate 25 function-specific mutant alleles, which map to non-overlapping surfaces on a predicted structure of the Kar4 protein (Kar4p). Most of the mating-specific alleles (Mat ) abolish Kar4p's interaction with the transcription factor Ste12p, indicating that Kar4p's mating function is through Ste12p.
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