Sentences with phrase «calcium ratio»
Without pH information, temperature reconstruction from magnesium to calcium ratios of such algae could be rather misleading», Dr. Jan Fietzke points out.
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She took 10 to 20 samples from each annual band of each core and analyzed the samples for the strontium / calcium ratio using atomic emission spectrometry.
Sufficient vitamin D is needed for calcium absorption as is a proper potassium / calcium ratio in the blood.
Corals substitute more strontium when the water is cold and less when the water is warm, so the strontium / calcium ratio of a bit of skeleton can reveal what the water temperature was when that piece of skeleton formed.
She took 10 to 20 samples from each annual band of each core and analyzed the samples for the strontium / calcium ratio using atomic emission spectrometry.
«When you measure the two of them together, you can use the strontium - calcium ratio to take away the temperature and that gives you a clear rainfall signal,» explains paleoclimatologist Nerilie Abrams of the British Antarctic Survey.
Because the otolith keeps growing throughout the animal's life, its chemical composition mirrors a fish's journey: Parts grown at sea have a higher strontium to calcium ratio than parts grown while the fish was in fresh water.
According to the Yale Bright Star Catalogue, 1991 5th Revised Edition notes entry for HR 98, however, the star has a lithium / calcium ratio that is 10 times Sol's.
An appropriate magnesium to calcium ratio is currently thought to be 1:1, according to Dr. Dean who has studied this issue for the past 15 years.
Too much phosphorus creates an imbalance of the two minerals, so the kidneys must excrete just enough phosphorus to maintain a healthy phosphorus - to - calcium ratio.
This helps balance the phosphorus: calcium ratio.
A phosphorus to calcium ratio is very important for cats.
This is especially true if phosphorus and calcium ratios are altered, which can result in malnutrition and growth abnormalities, particularly in large breed puppies.
The group highlighted the added value of measuring paired coral strontium / calcium ratios (Sr / Ca) and oxygen isotope ratios (δ18O), two key proxies for sea surface temperature that are often referred to as paleothermometers (δ18O also reflects sea surface salinity).
Corals substitute more strontium when the water is cold and less when the water is warm, so the strontium / calcium ratio of a bit of skeleton can reveal what the water temperature was when that piece of skeleton formed.