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the time that elapses after the administration of a protein before there appears in the urine an amount of nitrogen equivalent to that administered.Medical dictionary. 2011.
Human impacts on the nitrogen cycle — Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation (Galloway 2003). As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over… … Wikipedia
Silicon nitride — Preferred IUPAC name Silicon nitride … Wikipedia
Bacteria — Taxobox color = lightgrey name = Bacteria fossil range = Archean or earlier Recent image width = 210px image caption = Escherichia coli image is 8 micrometres wide. domain = Bacteria subdivision ranks = Phyla [cite web… … Wikipedia
Melatonin — Not to be confused with Melanin or Melanotan. Melatonin Systematic (IUPAC) name … Wikipedia
climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… … Universalium
Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… … Universalium
relaxation phenomenon — ▪ physics and chemistry Introduction in physics and chemistry, an effect related to the delay between the application of an external stress to a system that is, to an aggregation of matter and its response. It may occur in nuclear, atomic,… … Universalium
Nuklearkatastrophe von Fukushima — Satellitenfoto der Reaktorblöcke 1 bis 4 (von rechts nach links) am 16. März 2011 nach mehreren Explosionen und Bränden. Als Nuklearkatastrophe von Fukushima werden eine Reihe von katastrophalen Unfällen und schweren Störfällen im… … Deutsch Wikipedia
K+S — AG Rechtsform Aktiengesellschaft ISIN DE0007162000 Gründung 3. Oktober … Deutsch Wikipedia
food preservation — Any method by which food is protected against spoilage by oxidation, bacteria, molds, and microorganisms. Traditional methods include dehydration, smoking, salting, controlled fermentation (including pickling), and candying; certain spices have… … Universalium
