... to a new doctoral dissertation at Stockholm University in Sweden, based on analyses of deposits of pollen grains, it is possible that all of Sweden was virtually free of ice for long periods during ...
According to a new analysis of deposits of pollen grains, it is possible that all of Sweden was virtually free of ice for long periods during the latest ice age. The findings show that the glaciation ...
... our countries had received a third of the ANDRILL samples."
Some colleagues had noted an increase in pollen grains of woody plants in the sample immediately above, but none of the other samples had ...
... three-dimensional information – the image shows the "flattened" top half of the pollen. If a pollen grain has a furrow at this point, it can be seen on the image. From this information, the system ...
... world capable of isolating the sperm cells in the pollen grain of the model plant Arabidopsis thaliana. ... Pollen grains contain two sperm cells (the sexual cells) and an accompanying vegetative nucleus ...
... , are to date the only research group in the world capable of isolating the sperm cells in the pollen grain of the model plant Arabidopsis thaliana. This technique was crucial in a study to be ...
... the mystery completely independently of their counterparts in Leipzig, discovered in their samples pollen grains that were typical for the Ukraine. These included relatively large quantities of ...
... pollen protects it from deterioration for thousands of years. While it is possible to distinguish the pollen grains of maize and its close relatives from other grasses, it is more difficult, except ...
... asthma attacks. The most prominent hypothesis as to why it happens, the authors of the paper say, is that "pollen grains may rupture upon contact with rainwater, releasing respirable allergens, and ...
... 'double fertilization' process was how each single pollen grain could produce 'twin' sperm cells. ...
"Plants with a mutated version of this gene produce pollen grains with a single sperm cell instead ...
... pollen and proteins from the pistil interact; this determines the acceptance or rejection of individual pollen grains."
In the study, researchers used two specific pistil proteins, NaTTS and 120K, ...
... particles derived from combustion in diesel engines may remain adherent to the surface of pollen grains increasing their allergen activity) are other of the factors which contribute to the allergic ...
... delivery system, a tiny spherical container averaging less than 5 microns or the diameter of the smallest pollen grains.
The spheres are formed around solid microparticles that are either the drug to ...
... plant pollen grains, sperm cells, which carry the genetic material to be passed on to progeny, are cocooned ... journal Cell.
Transposons are "revealed" in a specific pollen cell type
The CSHL team made ...
... use a mathematical model based on Brownian motion (the kind of random motion you see when you watch pollen grains buffeted about in a drop of water) to determine how well stabilizing ...
