منابع مشابه
The Kinky Propulsion of Spiroplasma
Bacteria have evolved many different means of generating movement. In this issue of Cell, Shaevitz et al. (2005) describe the swimming movement of a helical bacterium called Spiroplasma. They discover that Spiroplasma propels itself by generating two temporally distinct kinks that travel the length of the bacterium. These results point to the existence of a contractile apparatus that drives cel...
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One of the most demonised forms of consensual sexuality is BDSM (bondage and discipline, domination and submission, and sadomasochism). Many counsellors still consider it appropriate to make negative comments about BDSM in a way that is perceived unacceptable in relation to other aspects of sexuality (Hudson-Allez, 2005). Kolmes, Stock and Moser (2006, p.315) found 118 reports of ‘biased or ina...
متن کاملKinky Brane Worlds
We present a toy model for five-dimensional heterotic M-theory where bulk three-branes, originating in 11 dimensions from M five-branes, are modelled as kink solutions of a bulk scalar field theory. It is shown that the vacua of this defect model correspond to a class of topologically distinct M-theory compactifications. Topology change can then be analysed by studying the time evolution of the...
متن کاملKinky D - Strings
We study two-dimensional SQED viewed as the world-volume theory of a D-string in the presence of D5-branes with non-zero background fields that induce attractive forces between the branes. In various approximations, the low-energy dynamics is given by a hyperKähler, or hyperKähler with torsion, massive sigma-model. We demonstrate the existence of kink solutions corresponding to the string inter...
متن کاملComparison of the membrane composition of Spiroplasma citri and the corn stunt Spiroplasma.
Components of membranes isolated from Spiroplasma citri and corn stunt spiroplasma grown at 28 degrees C were analyzed. On a protein basis, lipid phosphorus was lower and cholesterol was higher in S. citri. Only minor differences between the two species were found in fatty acid composition, reduced nicotinamide adenine dinucleotide diaphorase, and adenosine triphosphatase.
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ژورنال
عنوان ژورنال: Cell
سال: 2005
ISSN: 0092-8674
DOI: 10.1016/j.cell.2005.09.003