Quantcast

Latest Grant Jensen Stories

Some Bacteria Attack Using Poison Daggers
2012-02-27 10:00:41

[ Watch the Video ] Bacteria have evolved different systems for secreting proteins into the fluid around them or into other cells. Some, for example, have syringe-like exterior structures that can pierce other cells and inject proteins. Another system, called a type VI secretion system, is found in about a quarter of all bacteria with two membranes. Despite being common, researchers have not understood how it works. Now a team, co-led by researchers at the California Institute of...

2011-09-08 20:54:30

Researchers at the California Institute of Technology (Caltech) have obtained the first high-resolution, three-dimensional images of a cell with a nucleus undergoing cell division. The observations, made using a powerful imaging technique in combination with a new method for slicing cell samples, indicate that one of the characteristic steps of mitosis is significantly different in some cells. During mitosis, two sets of chromosomes get paired up at the center of the cell's nucleus. Then...

a3003fc2fa187d8ac9a47e4a8b99bcb41
2009-09-25 05:49:58

Findings show that structure is the same throughout bacterial kingdom, and may provide insight into more complex signaling pathways Using state-of-the-art electron microscopy techniques, a team led by researchers from Caltech has for the first time visualized and described the precise arrangement of chemoreceptors"”the receptors that sense and respond to chemical stimuli"”in bacteria. In addition, they have found that this specific architecture is the same throughout a wide...


Word of the Day
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
Related