منابع مشابه
Swarming Motility: It Better Be Wet
When grown on a soft agar surface in a rich medium, cells of Salmonella typhimurium elongate, produce extra flagella and move over the surface in a coordinated manner. In mutants with defects in the chemotaxis signaling pathway, the agar plates remain dry and the cells' flagella are short. Recent work shows that the anti-sigma factor controlling late-gene flagellar synthesis is secreted less by...
متن کاملMotility, Swarming, and Growth of Proteus
Kopp, RIUDOLF (Hygiene-Institut der Universitat, Freiburg, Germany), AND JOHANNES MULLER. Effects of related anionic detergents on flagellation, motility, swarming, and growth of Proteus. Appl. Microbiol. 13:950-955. 1965.-The effects of a series of sodium alkyl sulfates (C4 to C16) on flagellation, motility, swarming, and growth of Proteus were examined. The concentrations of the various sodiu...
متن کاملMeasurement of Proteus cell motility during swarming.
The motilities of Proteus long forms during swarming on agar were measured on cells transferred to liquid suspension. During concentric-ring formation on solid medium, when the edge of the swarm was advancing slowly or had stopped, the velocity of long-form motility was low. When the colony was spreading rapidly, long-form velocitywas relatively high. This periodic variation in cell velocity, w...
متن کاملIs it better to be injured when you are pregnant?
THERE HAS BEEN MUCH INVESTIGATION into the differential effects of sex hormones on the response to injury and hemorrhage. The preponderance of experimental reports have demonstrated that the hormonal milieu, in particular, increased levels of 17b-estradiol and decreased testosterone, affects cell-mediated immunity and organ system tolerance of shock through complex receptor-mediated and cell-sp...
متن کاملSedation: it is better to be safe than sorry.
Editor—We recently came across an editorial in the British Journal of Anaesthesia entitled 'Is sedation by non-anaesthetists really safe?' written by Drs Webb and Hunter. 1 This topic is becoming more and more at the forefront in our speciality. After spending many years as an anaesthesiologist and taking care (hands on) of patients, including neonates and patients up to 106 yr old, using all t...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2005
ISSN: 0960-9822
DOI: 10.1016/j.cub.2005.07.042