Sentences with phrase «known chemical composition»

As we don't currently have any real Mars regolith to experiment on, Qiao and his team used a Mars simulant — a material developed by NASA that closely approximates the known chemical composition and grain size of the real thing.

Nor is it particularly important to know the chemical composition of a man, except for the purposes of amusing or shocking audiences in popular lectures by telling them that they are so much hydrogen, oxygen, carbon, nitrogen, potassium, sulfur, and so on, worth one dollar and ninety - eight cents on the current market in chemicals.

«If we know the chemical composition of the nuclear waste coming out from those plants, we can definitely work on it.»

Not exact matches

When it comes to salt you can know second - handedly about salt, what it's chemical composition is made of, where you can find it, what can you use it for, but if somehow you never actually tasted salt before and you want to know what salt tastes like or if for some reason you should happen to need to know what salt tastes like, how are you going to know what salt tastes like second - handedly?

They haven't been subjected to clinical trials, and often little is known about their chemical composition, side effects or efficacy.

We know very little about the chemical compositions of space objects out there.

The team discovered each animal emits an intense odor that broadcasts the chemical composition of what is known as their major histocompatibility complex, or MHC, genotype.

Knowing how the internal and surface structure of a battery material changes over a wide range of chemical compositions will aid future studies on cathode transformations and could also lead to the development of new battery materials.

However, 10 years ago this idea was challenged when analyses of glass beads attributed to Ile - Ife showed that some had a chemical composition very different from that of known glass production areas.

For decades, astronomers thought that the stars that made up a given globular cluster all shared the same ages and chemical compositions — but we now know that they are stranger and more complicated creatures.»

Different parent populations, such as the Milky Way disk or halo, dwarf satellite galaxies or globular clusters, are known to have radically different chemical compositions.

The land also includes buckthorn, a non-native plant species, which is known to change the chemical composition of the soil and remove light from the canopy trees.

Known as subdwarfs, these stars are also fusing hydrogen in their core and so they mark the lower edge of the main sequence's fuzziness resulting from chemical composition.

Scientists have long known that plants impact the composition of the soil microbiome in the area surrounding their roots by sending out chemicals (metabolites).

By this theorem, once a star's chemical composition and its position on the main sequence is known, so too is the star's mass and radius.

Its distance is known precisely, and the discovery also enables researchers to place strong constraints on important factors such as its mass, orbit, age, and chemical composition without reference to the spectrum of light received from its surface.

However, spectroscopy should be able to estimate stellar masses, which for red giants directly infer ages provided their chemical composition is known.

For instance, today cellulose acetate is the chemical composition of the fiber preferred for many types of textiles, while regenerated cellulose or the product of the viscose industry and known as rayon makes up the great bulk of hundreds of millions of pounds now produced annually.

(The wiki values imply densities of 0.72 to 0.74 kg / L for gasoline, 0.762 for Gasohol E10 (10 % ethanol by volume); for 0.73 kg / L and a composition of 84.117 to 85 wt % C (the former calculated for octane, the later given by an encyclopedia (Britannica Macropedia entry «Chemical Elements» p. 945, sorry don't know the year, I'm looking at a photocopy) for petroleum, g CO2 / gal from combustion should be 8517 to 8606.

We know that spray foam, when used in interiors, can be harmful due to its flammability and chemical composition; however, in this application, it's on the exterior side of the concrete, and does admittedly provide great insular advantages and does fulfill the qualities of «water control, air control, vapor control, and thermal control» needed for the so - called «perfect wall.»

While scientists generally agree that this solar system's sun and planets came from the same nebular cloud, they do not know enough about how Earth obtained its chemical composition to understand its evolution or why the other planets are different from one other.

Our research team has spent the past two decades examining the chemical composition of the longest - lived animal that doesn't live in a colony known to science — the ocean quahog clam — to find out how the climate of the North Atlantic ocean has changed in relation to the atmosphere.

The researchers had to estimate such variables as the chemical composition of the atmosphere, the amount of sunlight reflected by Earth's surface back into the atmosphere, and the movement of heat and salinity in the oceans at a time when all the continents were consolidated into the giant land mass known as Pangaea.

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