Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

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

Year Number of Results
1860 1
1917 1
1919 2
1921 1
1926 1
1927 1
1928 2
1930 2
1932 1
1935 2
1936 3
1937 2
1938 1
1939 1
1941 2
1942 1
1943 2
1946 2
1947 4
1949 3
1950 7
1951 5
1952 7
1953 11
1954 16
1955 7
1956 10
1957 9
1958 10
1959 9
1960 10
1961 18
1962 17
1963 57
1964 69
1965 47
1966 52
1967 71
1968 65
1969 68
1970 94
1971 98
1972 105
1973 126
1974 182
1975 2844
1976 2865
1977 2523
1978 2610
1979 2916
1980 3313
1981 3621
1982 4078
1983 4772
1984 5284
1985 5725
1986 5826
1987 6160
1988 6475
1989 7537
1990 8117
1991 8116
1992 8720
1993 8709
1994 9202
1995 9585
1996 10167
1997 10416
1998 10745
1999 11436
2000 12088
2001 12586
2002 13105
2003 14241
2004 15474
2005 16611
2006 15687
2007 16652
2008 17439
2009 18497
2010 20023
2011 22296
2012 24663
2013 26233
2014 28944
2015 30961
2016 32688
2017 32322
2018 33598
2019 35044
2020 38851
2021 42388
2022 39653
2023 35465
2024 13286

Text availability

Article attribute

Article type

Publication date

Search Results

692,899 results

Results by year

Filters applied: . Clear all
Page 1
Showing results for period p
Your search for perindep retrieved no results
A research on the relationship between ejaculation and serum testosterone level in men.
Jiang M, Xin J, Zou Q, Shen JW. Jiang M, et al. J Zhejiang Univ Sci. 2003 Mar-Apr;4(2):236-40. doi: 10.1631/jzus.2003.0236. J Zhejiang Univ Sci. 2003. PMID: 12659241 Retracted. Clinical Trial.
Ejaculation is the precondition and beginning of the special periodic serum testosterone level variations, which would not occur without ejaculation. ...These data are the first to document the phenomenon of the periodic change in serum testosterone level; the corre …
Ejaculation is the precondition and beginning of the special periodic serum testosterone level variations, which would not occur with …
[Periodic changes in serum testosterone levels after ejaculation in men].
Jiang M. Jiang M. Sheng Li Xue Bao. 2002 Dec 25;54(6):535-8. Sheng Li Xue Bao. 2002. PMID: 12506329 Free article. Chinese.
On day 7 of abstinence, a peak of serum testosterone appeared, reaching 145.7% of the baseline (P<0.01). After the peak, no regular fluctuation was observed. Ejaculation was the premise and beginning of the 7 days' periodic phenomenon. If there was no ejaculation …
On day 7 of abstinence, a peak of serum testosterone appeared, reaching 145.7% of the baseline (P<0.01). After the peak, no regula …
Plant circadian rhythms.
McClung CR. McClung CR. Plant Cell. 2006 Apr;18(4):792-803. doi: 10.1105/tpc.106.040980. Plant Cell. 2006. PMID: 16595397 Free PMC article. Review. No abstract available.
Determining ICU EEG periodic patterns and why it matters.
Gélisse P, Tatum WO, Crespel A, Jallon P, Kaplan PW. Gélisse P, et al. J Neurol. 2023 Oct;270(10):4744-4752. doi: 10.1007/s00415-023-11835-7. Epub 2023 Jul 1. J Neurol. 2023. PMID: 37393201 Free PMC article. Review.
Historically, periodic EEG patterns were described as any pattern with stereotyped paroxysmal complexes occurring at regular intervals, i.e., the period (T). ...More important than the inter-discharge interval (t2), periodic EEG patterns occur at time regular …
Historically, periodic EEG patterns were described as any pattern with stereotyped paroxysmal complexes occurring at regular interval …
Entrainment Maps.
Diekman CO, Bose A. Diekman CO, et al. J Biol Rhythms. 2016 Dec;31(6):598-616. doi: 10.1177/0748730416662965. Epub 2016 Oct 17. J Biol Rhythms. 2016. PMID: 27754956
Circadian oscillators found across a variety of species are subject to periodic external light-dark forcing. Entrainment to light-dark cycles enables the circadian system to align biological functions with appropriate times of day or night. ...The map is also ideally suite …
Circadian oscillators found across a variety of species are subject to periodic external light-dark forcing. Entrainment to light-dar …
Melatonin Administration Methods for Research in Mammals and Birds.
Ovid D, Hayes TB, Bentley GE. Ovid D, et al. J Biol Rhythms. 2018 Dec;33(6):567-588. doi: 10.1177/0748730418795802. Epub 2018 Sep 24. J Biol Rhythms. 2018. PMID: 30246597 Review.
Special issues arise when developing administration protocols for hormones with circadian and seasonal periodicity. This article reviews various methods for the exogenous administration of hormones with such periodicities by focusing on melatonin. ...
Special issues arise when developing administration protocols for hormones with circadian and seasonal periodicity. This article revi …
Why are so many biological systems periodic?
Rapp PE. Rapp PE. Prog Neurobiol. 1987;29(3):261-73. doi: 10.1016/0301-0082(87)90023-2. Prog Neurobiol. 1987. PMID: 3299493 Review.
Oscillations are observed in all types of organisms from the simplest to the most complex. Periods can range from fractions of a second to months or years. From time to time, it has been suggested that many biological oscillations are the result of the breakdown of effecti …
Oscillations are observed in all types of organisms from the simplest to the most complex. Periods can range from fractions of a seco …
Pulse and meter as neural resonance.
Large EW, Snyder JS. Large EW, et al. Ann N Y Acad Sci. 2009 Jul;1169:46-57. doi: 10.1111/j.1749-6632.2009.04550.x. Ann N Y Acad Sci. 2009. PMID: 19673754 Review.
The experience of musical rhythm is a remarkable psychophysical phenomenon, in part because the perception of periodicities, namely pulse and meter, arise from stimuli that are not periodic. ...
The experience of musical rhythm is a remarkable psychophysical phenomenon, in part because the perception of periodicities, namely p …
Interval timing: memory, not a clock.
Staddon JE. Staddon JE. Trends Cogn Sci. 2005 Jul;9(7):312-4. doi: 10.1016/j.tics.2005.05.013. Trends Cogn Sci. 2005. PMID: 15953755 Review.
Anticipation of periodic events signalled by a time marker, or interval timing, has been explained by a separate pacemaker-counter clock. ...
Anticipation of periodic events signalled by a time marker, or interval timing, has been explained by a separate pacemaker-counter cl …
Demographic consequences of changes in environmental periodicity.
Conquet E, Ozgul A, Blumstein DT, Armitage KB, Oli MK, Martin JGA, Clutton-Brock TH, Paniw M. Conquet E, et al. Ecology. 2023 Mar;104(3):e3894. doi: 10.1002/ecy.3894. Epub 2023 Jan 22. Ecology. 2023. PMID: 36208282
We investigated the effects of changes in vital-rate periodicity on populations of three species representing different forms of adaptation to periodic environments: the yellow-bellied marmot (Marmota flaviventer), adapted to strong seasonality in snowfall; the meer …
We investigated the effects of changes in vital-rate periodicity on populations of three species representing different forms of adap …
692,899 results
You have reached the last available page of results. Please see the User Guide for more information.