The first hirnantian (Uppermost Ordovician) Odontopleurid trilobite from western Gondwana (Argentina) [PDF]
, 2014 An odontopleurid trilobite remain is described for the fi rst time from Hirnantian (uppermost Ordovician) rocks of Western Gondwana. Very rare material, represented by a single left librigena, comes from a new fossil locality of the Don Braulio Formation
Halpern, Karen +2 more
core +1 more source
Ultracold chemical reactions of a single Rydberg atom in a dense gas
, 2016 Within a dense environment ($\rho \approx 10^{14}\,$atoms/cm$^3$) at ultracold temperatures ($T < 1\,\mu{}\text{K}$), a single atom excited to a Rydberg state acts as a reaction center for surrounding neutral atoms.
Böttcher, Fabian +12 more
core +2 more sources
Exceptionally preserved Cambrian trilobite digestive system revealed in 3D by synchrotron-radiation X-ray tomographic microscopy. [PDF]
PLoS ONE, 2012 The Cambrian 'Orsten' fauna comprises exceptionally preserved and phosphatised microscopic arthropods. The external morphology of these fossils is well known, but their internal soft-tissue anatomy has remained virtually unknown.
Mats E Eriksson, Fredrik Terfelt
doaj +1 more source
Observation of blue-shifted ultralong-range Cs$_{2}$ Rydberg molecules
, 2012 We observe ultralong-range blue-shifted Cs$_{2}$ molecular states near $ns_{1/2}$ Rydberg states in an optical dipole trap, where $31\leq n\leq34$. The accidental near degeneracy of $(n-4)l$ and $ns$ Rydberg states for $l>2$ in Cs, due to the small ...
D. Booth +5 more
core +1 more source
Planar cell polarity genes Frizzled3a, Vangl2, and Scribble are required for spinal commissural axon guidance [PDF]
, 2016 Background A fundamental feature of early nervous system development is the guidance of axonal projections to their targets in order to assemble neural circuits that control behavior.
Purdy, Ashley M. +2 more
core +2 more sources
Chronostratigraphic Subdivision of the Cambrian of China
Geologica Acta, 2003 The chronostratigraphic framework for the Cambrian of South China is reviewed. Currently four series and nine stages are recognized. The Cambrian of South China is subdivided into one pre-trilobite-bearing series, the Diandongian Series, and three ...
Sanchi Peng
doaj +1 more source
Doubts about the crucial role of the rising-tube mechanism in the formation of sunspot groups
, 2014 Some preliminary processing results are presented for a dataset obtained with the Solar Optical Telescope on the Hinode satellite. The idea of the project is to record, nearly simultaneously, the full velocity and magnetic-field vectors in growing active
Buchnev, A. A. +2 more
core +1 more source
The potential functions of mechanoreceptors found on trilobite larva of Limulus polyphemus (Linnaeus, 1758) [PDF]
Arthropods, 2022 In this study trilobite larvae and early juvenile stages of Limulus polyphemus (Linnaeus, 1758) are examined using light microscopy and scanning electron microscopy to examine the mechanoreceptors present on the cuticle.
John A. Fornshell
doaj
, 2011 The Cambrian rocks of Wales mostly lie within the Avalon composite terrane, apart from a small area of Cambrian rocks of the Monian composite terrane that is discussed in Chapter 9.
Molyneux, S.G., Rushton, A.W.A.
core
Biomineral electron backscatter diffraction for palaeontology [PDF]
, 2016 Electron backscatter diffraction (EBSD) originated in materials science and has transferred to biomineral research providing insight into fossil and modern biominerals.
Aizenberg +78 more
core +1 more source