Sentences with phrase «leaf waxes»

"Leaf waxes" refer to the protective coating on the surface of leaves, which helps prevent water loss and protects them from external factors like pests and UV radiation. Full definition
Long after stems and roots have faded away, leaf wax residue can be preserved for hundreds of millions of years.
Wondering if I need to leave some wax aside to top up after?
Estimates relied on measurements of forms of carbon and hydrogen in leaf wax recovered from ocean sediment cores collected off the Sahara's west coast.
Brown researchers have compiled a detailed Indonesian climate record of the last 60,000 years, tracking telltale indicators in sedimentary cores: titanium levels (a marker for surface water runoff) and the carbon isotopes of leaf wax, a marker for plant varieties (grasses indicate dry conditions).
The findings are based on analyses of ancient plant leaf wax found in the sediments of the Gulf of Guinea in combination with computer models of the climate system.
(hint: try parchment paper — it doesn't leave a wax taste)
They measured the amounts of carbon isotopes in plant - leaf wax found in the sediments and from that determined what types of plants had lived in the two areas during the past 27,000 years.
One of the most enduring markers she examines is a commonplace substance known as leaf wax.
Once I found General Finishes High Performance Top Coat (Flat) and read how incredibly durable it is, I've left wax behind and have never looked back!!!
The dye clings to the unwaxed areas of the cloth, leaving the waxed areas white.
By examining plant leaf wax remnants in sediment core samples taken from beneath the Ross Ice Shelf, the research team found summer temperatures along the Antarctic coast 15 to 20 million years ago were 20 degrees Fahrenheit (11 degrees Celsius) warmer than today, with temperatures reaching as high as 45 degrees Fahrenheit (7 degrees Celsius).
I only leave the wax for about half an hour at the most before buffing though as I find any longer and it's hard work.
Unlike other lip care products I've reviewed, Baby Lips isn't hard or stiff and doesn't leave a wax - like coating on my lips after use.
The afternoon sessions on water isotopes in precipitation was quite exciting because of the number of people looking at innovative proxy archives, including cave records of 18O in calcite, or deuterium in leaf waxes, which are extending the coverage (in time and space) of this variable.
Let kids be kids, and leave the waxing and self - consciousness for their awkward teen years - instead of yours.
She uses this knowledge of plants, and specifically their leaf waxes, to document past changes in plant life and rainfall patterns, including studies on the expansion of grasslands in Africa and the revegetation of Antarctica during a prior warming event.
By analyzing the leaf wax from ancient marine sediments, the team determined the region's past rainfall patterns and also gathered clues about what types of plants were growing.
That finding was buttressed by another proxy of rainfall: carbon isotopes from plant leaf wax.
Different plants have different carbon isotopes in their leaf wax.
New research has outlined a new methodology for estimating ancient atmospheric water content based on fossil plant leaf waxes.
Because plants alter the chemical composition of the wax on their leaves depending on how dry or wet the climate is, the leaf wax from the sediment core's layers provides a record of past fluctuations in rainfall.
To figure out the region's ancient rainfall patterns from the sediment core, the researchers analyzed the ancient leaf wax that had blown into the ocean from terrestrial plants.
The total leaf wax content was 0.5 % of the dry leaf weight, and the caffeine and theobromine contents of the leaf wax varied from 0.16 to 127.6 mcg / mg and from 0 to 9.5 mcg / mg of wax respectively.
Studies have identified and quantified the amount of caffeine and theobromine in the leaf waxes of Yerba Mate.
An analysis of the leaf wax provided a record of the water taken up by the plants when they lived.
Within the sediment, they found plant - leaf wax, an indication of ancient vegetation.
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