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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1945 2
1946 6
1947 5
1948 4
1949 5
1951 13
1952 20
1953 29
1954 29
1955 27
1956 35
1957 36
1958 29
1959 44
1960 38
1961 43
1962 35
1963 1
1964 11
1965 75
1966 183
1967 286
1968 380
1969 410
1970 374
1971 517
1972 538
1973 542
1974 632
1975 568
1976 433
1977 442
1978 432
1979 433
1980 386
1981 372
1982 387
1983 342
1984 371
1985 400
1986 421
1987 359
1988 366
1989 383
1990 405
1991 436
1992 384
1993 449
1994 385
1995 468
1996 453
1997 490
1998 485
1999 445
2000 458
2001 454
2002 490
2003 460
2004 451
2005 509
2006 513
2007 501
2008 456
2009 514
2010 538
2011 572
2012 599
2013 577
2014 573
2015 526
2016 532
2017 519
2018 526
2019 276
2020 11
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23,785 results
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Page 1
Urea.
Wang H, et al. Subcell Biochem 2014 - Review. PMID 25298336
Urea is generated by the urea cycle enzymes, which are mainly in the liver but are also ubiquitously expressed at low levels in other tissues. ...Urea is then eliminated through fluids, especially urine. Blood urea nitrogen (BUN) has been utilized to evaluate renal function for decades. ...
Urea is generated by the urea cycle enzymes, which are mainly in the liver but are also ubiquitously expressed at low levels i
Urea metabolism in man.
WALSER M and BODENLOS LJ. J Clin Invest 1959. PMID 13842664 Free PMC article.
Urea metabolism in chronic renal failure.
Walser M. J Clin Invest 1974. PMID 4825230 Free PMC article.
In the same subjects, urea appearance rate was measured as the sum of urea excretion and the daily change in the urea pool. No negative correlation was noted between urea appearance and urea degradation, as might be expected if portal ammonia were being utilized for protein synthesis. However, urea production was positively correlated (r = 0.76) with urea degradation, suggesting that most of the resulting portal ammonia is converted back to urea. ...
In the same subjects, urea appearance rate was measured as the sum of urea excretion and the daily change in the urea p …
15N-urea metabolism in the functioning human colon: luminal hydrolysis and mucosal permeability.
Moran BJ and Jackson AA. Gut 1990. PMID 2338273 Free PMC article.
The biopsy channel of the colonoscope was used in a novel approach to the study of in vivo colonic nitrogen metabolism in 12 subjects. ...Urinary 15N14N-urea from the right colon was 18% of the dose compared to 13% from the left colon. This represents urea that has been hydrolysed and absorbed as ammonia. ...
The biopsy channel of the colonoscope was used in a novel approach to the study of in vivo colonic nitrogen metabolism in 12 subjects …
Urea metabolism in an azotaemic woman with normal renal function.
Richards P and Brown CL. Lancet 1975. PMID 51963
The blood-urea of a 43-year-old woman with normal renal function was 150 mg. per 100 ml. because she regularly consumed about 400 g. of protein daily. ...Although she had a very large body-urea pool she degraded no more urea than healthy individuals on a normal diet. The failure of endogenous urea hydrolysis to increase in proportion to the blood-urea in renal failure has tentatively been ascribed to toxic effects of compounds retained with urea in renal failure; the findings in this azotaemic patient, who had neither signs nor symptoms of uraemia, cast doubt upon that explanation....
The blood-urea of a 43-year-old woman with normal renal function was 150 mg. per 100 ml. because she regularly consumed about 400 g. …
Metabolism of 15N-labelled urea in the functioning and defunctioned human colon.
Moran BJ and Jackson AA. Clin Sci (Lond) 1990. PMID 2169374
The luminal metabolism of urea was studied using double-labelled urea ([15N2]urea) which was placed in the lumen of the colon through a colostomy. ...The data confirm that the colon is permeable to the intact urea molecule. Intraluminal urea is readily hydrolysed in the functioning colon. ...
The luminal metabolism of urea was studied using double-labelled urea ([15N2]urea) which was placed in the lumen …
Urease (EC 3.5.1.5) inhibition in the sheep rumen and its effect on urea and nitrogen metabolism.
Whitelaw FG, et al. Br J Nutr 1991. PMID 1760442
Urinary urea excretion was not affected, hence urea degradation, measured by difference, decreased by 77 and 58% respectively in response to urease inhibition. Administration of PPDA to the abomasum resulted in a reduction in rumen urease activity to about 40% of control values but had no effect on urea metabolism. ...
Urinary urea excretion was not affected, hence urea degradation, measured by difference, decreased by 77 and 58% respectively …
METABOLISM of urea.
[No authors listed] Nutr Rev 1954. PMID 13120005
Metabolism of C14-1abeled Urea.
Leifer E, et al. Science 1948. PMID 17729958
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