منابع مشابه
Retinitis Pigmentosa. With an Analysis of 17 Cases Occurring in Deaf-Mutes
blood and urine analyses made by Dr. John M. Swan which are of interest, but which throw no fresh light on the cause or diagnosis of the disease. Retinitis Pigmentosa sine pigmento of which one frequently hears, the author regards as merely an early stage of the disease, and states that in such cases the pigments will appear sooner or later. The disease is so constantly bilateral that limitatio...
متن کاملDictyostelium amoebae and neutrophils can swim.
Animal cells migrating over a substratum crawl in amoeboid fashion; how the force against the substratum is achieved remains uncertain. We find that amoebae and neutrophils, cells traditionally used to study cell migration on a solid surface, move toward a chemotactic source while suspended in solution. They can swim and do so with speeds similar to those on a solid substrate. Based on the surp...
متن کاملStraight mutants of Spirillum volutans can swim.
Nonhelical mutant cells of Spirillum volutans ATCC 19554 can swim as fast as the helical cells. Consequently, a helical cell shape is not required for motility of this species, and the function of the polar flagellar fascicles is not merely to cause rotation, and therefore translocation, of the corkscrew-shaped cell.
متن کاملCan phoretic particles swim in two dimensions?
Artificial phoretic particles swim using self-generated gradients in chemical species (self-diffusiophoresis) or charges and currents (self-electrophoresis). These particles can be used to study the physics of collective motion in active matter and might have promising applications in bioengineering. In the case of self-diffusiophoresis, the classical physical model relies on a steady solution ...
متن کاملCan you really swim? Validation of self and parental reports of swim skill with an inwater swim test among children attending community pools in Washington State.
BACKGROUND Drowning is the second leading cause of unintentional injury death among US children. Multiple studies describe decreased drowning risk among children possessing some swim skills. Current surveillance for this protective factor is self/proxy-reported swim skill rather than observed inwater performance; however, children's self-report or parents' proxy report of swim skill has not bee...
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ژورنال
عنوان ژورنال: The Journal of Laryngology, Rhinology, and Otology
سال: 1909
ISSN: 1755-1463,2051-2082
DOI: 10.1017/s1755146300183738