Definitions for ahr
ahr

WikipediaRate this definition:0.0 / 0 votes

1. ahr

   The aryl hydrocarbon receptor (also known as AhR, AHR, ahr, ahR, AH receptor, or dioxin receptor) is a protein that in humans is encoded by the AHR gene. The aryl hydrocarbon receptor is a transcription factor that regulates gene expression. It was originally thought to function primarily as a sensor of xenobiotic chemicals and also as the regulator of enzymes such as cytochrome P450s that metabolize these chemicals. The most notable of these xenobiotic chemicals are aromatic (aryl) hydrocarbons from which the receptor derives its name. More recently, it has been discovered that AhR is activated (or deactivated) by a number of endogenous indole derivatives such as kynurenine. In addition to regulating metabolism enzymes, the AhR has roles in regulating immunity, stem cell maintenance, and cellular differentiation.The aryl hydrocarbon receptor is a member of the family of basic helix-loop-helix transcription factors. AHR binds several exogenous ligands such as natural plant flavonoids, polyphenolics and indoles, as well as synthetic polycyclic aromatic hydrocarbons and dioxin-like compounds. AhR is a cytosolic transcription factor that is normally inactive, bound to several co-chaperones. Upon ligand binding to chemicals such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), the chaperones dissociate resulting in AhR translocating into the nucleus and dimerizing with ARNT (AhR nuclear translocator), leading to changes in gene transcription.

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1. Ahr

   Ahr is a river in Germany, a left tributary of the Rhine. Its source is at an elevation of approximately 470 metres above sea level in Blankenheim in the Eifel, in the cellar of a timber-frame house near the castle of Blankenheim. After 18 kilometres it crosses from North Rhine-Westphalia into Rhineland-Palatinate. The Ahr flows through Ahr valley or Ahrtal, passing through the towns of Schuld, Altenahr and Bad Neuenahr-Ahrweiler. Between Remagen and Sinzig, at about 50 m above sea level, it flows into the Rhine. The length is roughly 89 km, of which 68 km is within Rhineland-Palatinate. The Ahr has a gradient of 0.4% in its lower course, and 0.4-0.8% in its upper course. The Ahr and its tributaries are a main drainage system of the eastern Eifel. The watershed is approximately 900 km². There were isolated settlements in the Ahr valley beginning at the latest in Roman times, evidenced by the Roman villa near Ahrweiler. Owing to their isolated location, the upper and middle parts of the course were sparsely populated. That changed from the mid-19th century.

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1. AHR

   What does AHR stand for? -- Explore the various meanings for the AHR acronym on the Abbreviations.com website.

Surnames Frequency by Census RecordsRate this definition:0.0 / 0 votes

1. AHR

   According to the U.S. Census Bureau, Ahr is ranked #41501 in terms of the most common surnames in America.
   
   The Ahr surname appeared 524 times in the 2010 census and if you were to sample 100,000 people in the United States, approximately 0 would have the surname Ahr.
   
   92.5% or 485 total occurrences were White.
   4% or 21 total occurrences were of Hispanic origin.
   1.1% or 6 total occurrences were Black.
   1.1% or 6 total occurrences were Asian.
   1.1% or 6 total occurrences were of two or more races.

How to pronounce ahr?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say ahr in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of ahr in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of ahr in Pythagorean Numerology is: 9

Examples of ahr in a Sentence

1. Schuld Mayor Helmut Lussi:

   I think that flood protection systems would not have helped me because Jeff Da Costa can not calculate this, what happens to the river Ahr with such masses of water.

Popularity rank by frequency of use

References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Ahr
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=ahr
3. ^ Surnames Frequency by Census Records
   https://www.census.gov/topics/population/genealogy/data/2010_surnames.html