Image of the Week - September 10, 2018
CIL:39062 - http://cellimagelibrary.org/images/39062
Description: This light micrograph shows the outside edge of two seminiferous tubules of a mouse testis. This section is a 1um thick transverse section, stained with toluidine blue to highlight the cells, with the nucleus staining a darker blue. The dark blue line separating the two seminiferous tubules consists mostly of myoid (muscle) tissue. The majority of cells seen in this image (arranged in layers) are germ cells, which, by repeated cell division, eventually produce spermatozoa. Chromosomes are visible in most of the nuclei of the cells. The cell with a deeply-stained nucleus and even darker nucleolus is a Sertoli cell (‘nurse cell’) that has fine cytoplasmic extensions branching between the other cells to nurture the developing germ cells.
Author: Spike Walker
Licensing: Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales (CC BY-NC-ND 2.0 UK)
Ahora todo tiene sentido xD
Nucleus…in a GIF!
Two weeks ago, in a remarkable move, the State Plant Board of Arkansas voted to ban the sale and use of a weedkiller called dicamba. It took that action after a wave of complaints about dicamba drifting into neighboring fields and damaging other crops, especially soybeans.
That ban is still waiting to go into force. It requires approval from a committee of the state legislature, which will meet on Friday.
Estimates of dicamba’s damage, however, continue to increase. Since the Plant Board’s vote, the number of dicamba-related complaints in Arkansas has soared to 550. Reports of damage also are increasing in the neighboring states of Tennessee, Missouri and Mississippi. The total area of damaged soybean fields could reach 2 million acres.
“I’ve never seen anything even close to this,” says Larry Steckel, a weed specialist at the University of Tennessee. “We have drift issues every year in a handful of fields, but I’ve never seen anything like this.”
Dicamba is not a new weedkiller; it’s been around for 50 years. It’s being used in a new way, though, because the biotech company Monsanto is now selling new soybean and cotton varieties that have been genetically altered to tolerate dicamba.
A sprayer covers a soybean field with an herbicide to control weeds. Scott Sinklier/Getty Images
Gene mutations seem a little “Twilight Zone” to us.
Mitosis, Neurons, and the DNA replication complex.
Team Chloroplast or Team Mitochondrion?
Poster of this available here!
WIP
here’s a happy cell to welcome summer :)
A bacterium living on the diatom of and amphipod
(Reddit)
Zoooooooooooom