News tagged with leave

New AMA module helps identify physician distress

(HealthDay)—A new resource has been developed to help physicians identify distressed colleagues and help them to access care, according to a report published by the American Medical Association (AMA).

Oct 04, 2016
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Longer maternity leave linked to better infant health

For each additional month of paid maternity leave offered in low- and middle-income countries (LMICs), infant mortality is reduced by 13%, according to a new study by researchers from McGill University and UCLA Fielding School ...

Mar 30, 2016
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In botany, a leaf is an above-ground plant organ specialized for photosynthesis. For this purpose, a leaf is typically flat (laminar) and thin. There is continued debate about whether the flatness of leaves evolved to expose the chloroplasts to more light or to increase the absorption of carbon dioxide. In either case, the adaption was made at the expense of water loss. In the Devonian period, when carbon dioxide concentration was at several times its present value, plants did not have leaves or flat stems. Many bryophytes have flat, photosynthetic organs, but these are not true leaves. Neither are the microphylls of lycophytes. The leaves of ferns, gymnosperms, and angiosperms are variously referred to as macrophyll, megaphylls, or euphylls.

Leaves are also the sites in most plants where transpiration and guttation take place. Leaves can store food and water, and are modified in some plants for other purposes. The comparable structures of ferns are correctly referred to as fronds. Furthermore, leaves are prominent in the human diet as leaf vegetables.

This text uses material from Wikipedia, licensed under CC BY-SA

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