In fact, he would have perceived this sun, as yet in the gaseous state, and composed of moving molecules, revolving round its axis in order to accomplish its work of concentration.
Another phenomenon would now have passed before the observer's eye, and the molecules situated on the plane of the equator, escaping like a stone from a sling of which the cord had suddenly snapped, would have formed around the sun sundry concentric rings resembling that of Saturn.
"This is the breakthrough," says Matthias Weidemuller, a physicist who was formerly at the University of Freiburg in Germany and whose group recently succeeded in making an ultracold lithium-cesium molecule
. "The thing that drives the whole field is to create ultracold systems that you can manipulate and observe."
The process of activating T cells involves a number of proteins, including the "T-cell receptor," a molecule
on the surface of a T cell that recognizes and binds to proteins from the cells or tissues that will subsequently be attacked by the immune system.
Even if the amino acids are different, it is the overall structure that defines the activity of the molecule
." However, Projan admits, "I'll be skeptical about the impact of this work until we have a molecule
that works by [these] rules and a molecule
that also works in an infection model."
Sugar (sucrose)--a natural plant product--is a molecule
(two or more atoms joined together by a chemical bond) made up of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (see diagram, right).
Curiously, an important part of the chlorophyll molecule
is almost identical to a part of hemoglobin, which carries oxygen through our bloodstreams.
When the rod-shaped liquid crystal molecules
are added, one end of each molecule
attaches to an exposed carbon atom, resulting in the alignment of all the liquid crystal molecules
in the direction of the rows.
What you're describing with the phrase molecular nanotechnology is a completely different approach which rests on the principle that your first building block is the molecule
At altitudes below 15 km, gas molecules
are closely packed and each molecule
travels only a few dozen nanometers before it collides with another.
Then they bonded the collagen with a lipophilic, or oil-clinging, molecule
that helps it penetrate the epidermis.
The purpose of this program announcement is to encourage basic research on the detection and manipulation of single molecules
. Recent advances in optical imaging and biomechanical techniques have shown that it is possible to make observations on the dynamic behavior of single molecules
, to determine mechanisms of action at the level of an individual molecule
, and to explore heterogeneity among different molecules
within a population.
with a knack for picking up and delivering atoms may prove a useful tool for atomic-scale construction.
At the beginning of the dance, a catalyst molecule
joins with one starting molecule
, forming a chemical ring.
Rather than X rays, the source of information is radiation emitted by an exquisitely fast vibration of electric charge within the molecule
. In place of imaging human tissue layer by layer, as a medical CT scan does, the scientists assemble images of slivers of molecules
into detailed portraits that, for the first time, depict the spatial distribution--the quantum actions--of the molecules
' outermost electrons.