منابع مشابه
To move or not to move.
Semaphorins were discovered 11 years ago as molecular cues for axon guidance that are conserved from invertebrates to humans. More than 20 semaphorin genes have been identified in mammals and their protein products are now known to be involved in a range of processes from the guidance of cell migration to the regulation of the immune response, angiogenesis and cancer. Plexins, either alone or i...
متن کاملTime to move on.
I am sure it is no coincidence that in the year I have turned 40 a new challenge has beckoned. In a few months I shall be heading off to train for a new career. After 20 years, six different universities and four countries it is time to venture beyond the world of higher education. I am not being terribly bold, though, quite the opposite, as I am moving into primary education. Grant application...
متن کاملTime to Move On?
Cosmology and particle physics have long been dominated by theoretical paradigms: Einstein’s general theory of relativity in cosmology and the Standard Model of particle physics. The time may have come for paradigm shifts. Does cosmological inflation require a modification of Einstein’s gravity? Have experiments at the LHC discovered a new particle beyond the Standard Model? It is premature to ...
متن کاملLearning to Move.
Locomotion-moving the body from place to place-is one of infants' greatest achievements. In addition to conquering gravity, infants must cope with variable and novel constraints on balance and propulsion. At the same time that they are learning to move, changes in infants' bodies, skills, and environments change the biomechanical constraints on movement. Recent work highlights both flexibility ...
متن کاملA national survey of 'inactive' physicians in the United States of America: enticements to reentry
BACKGROUND Physicians leaving and reentering clinical practice can have significant medical workforce implications. We surveyed inactive physicians younger than typical retirement age to determine their reasons for clinical inactivity and what barriers, real or perceived, there were to reentry into the medical workforce. METHODS A random sample of 4975 inactive physicians aged under 65 years ...
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ژورنال
عنوان ژورنال: Nature
سال: 2013
ISSN: 0028-0836,1476-4687
DOI: 10.1038/nature12549