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Science News for April 9, 1999


Seeing Movement In The Dark

Researchers at Max Planck Institute found that moving objects appear slower through rod photoreceptors than cone photoreceptors, especially under low light conditions. This underestimation can lead to compensatory speeding-up, which may be fatal.

SourceMax-Planck-Gesellschaft·JournalNature·DateApr 9, 1999

Study Defines Scope Of Vaccine-Preventable Infections

A study conducted in India found that pneumococcal serotypes 1, 6, 19, and others were commonly prevalent, with type-1 found in 25% of cases. The researchers also discovered high rates of antibiotic resistance among S. pneumoniae, particularly in urban areas.

SourceChild Health Research Project·JournalThe Lancet·DateApr 9, 1999

New Findings On Primitive Shark Contradicts Current View Of Jaw Evolution

A new 400-million-year-old primitive shark relative from Bolivia named Pucapampella has been discovered, contradicting the belief that chondrichthyans are primitive due to their jaw characteristics. The fossil suggests that modern shark jaws are an advanced characteristic than the jaws of bony fish.

SourceAmerican Museum of Natural History·DateApr 9, 1999
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Experiment Demonstrates Transistorless Funtional Logic Gate

University of Notre Dame researchers have successfully demonstrated a functioning transistorless logic gate using quantum-dot cellular automata (QCA) technology. The device consists of four quantum dots connected in a ring by tunnel junctions, enabling digital data to be encoded in the positions of only two electrons.

SourceUniversity of Notre Dame·JournalScience·DateApr 9, 1999