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Year Number of Results
1874 2
1886 1
1890 2
1897 1
1898 1
1899 1
1900 1
1903 1
1904 1
1906 1
1907 1
1909 1
1914 1
1915 2
1916 3
1917 1
1920 2
1925 4
1926 4
1927 3
1928 1
1929 2
1931 2
1932 2
1933 4
1934 3
1935 1
1936 3
1938 1
1939 2
1941 2
1942 2
1944 2
1945 9
1946 33
1947 43
1948 52
1949 60
1950 100
1951 121
1952 131
1953 135
1954 134
1955 120
1956 105
1957 111
1958 116
1959 114
1960 124
1961 130
1962 138
1963 155
1964 212
1965 138
1966 96
1967 102
1968 127
1969 149
1970 175
1971 376
1972 702
1973 674
1974 727
1975 740
1976 729
1977 703
1978 672
1979 730
1980 827
1981 903
1982 919
1983 990
1984 939
1985 882
1986 871
1987 802
1988 850
1989 746
1990 761
1991 643
1992 630
1993 617
1994 567
1995 496
1996 506
1997 517
1998 500
1999 419
2000 486
2001 494
2002 452
2003 443
2004 493
2005 496
2006 559
2007 589
2008 598
2009 607
2010 656
2011 681
2012 819
2013 873
2014 883
2015 896
2016 852
2017 940
2018 976
2019 993
2020 1251
2021 1510
2022 1536
2023 1495
2024 1397
2025 2

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42,046 results

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Page 1
Overwintering adaptations and extreme freeze tolerance in a subarctic population of the wood frog, Rana sylvatica.
Costanzo JP. Costanzo JP. J Comp Physiol B. 2019 Feb;189(1):1-15. doi: 10.1007/s00360-018-1189-7. Epub 2018 Nov 2. J Comp Physiol B. 2019. PMID: 30390099 Review.
The terrestrially hibernating wood frog (Rana sylvatica) is well-known for its iconic freeze tolerance, an overwintering adaptation that has received considerable investigation over the past 35 years. ...
The terrestrially hibernating wood frog (Rana sylvatica) is well-known for its iconic freeze tolerance, an overwintering adaptation t …
Function of the sexually dimorphic ear of the American bullfrog, Rana catesbeiana: brief review and new insight.
Werner YL, Pylka J, Schneider H, Seifan M, Walkowiak W, Werner-Reiss U. Werner YL, et al. J Exp Biol. 2009 Jul;212(Pt 14):2204-14. doi: 10.1242/jeb.027516. J Exp Biol. 2009. PMID: 19561210 Review.
The dimorphic ear of the bullfrog, Rana catesbeiana, has long been enigmatic. The male's tympanic membrane (TM) area approximates twice the area of the female's; however, similar size differences in the area of the columellar footplate were not observed between the sexes. …
The dimorphic ear of the bullfrog, Rana catesbeiana, has long been enigmatic. The male's tympanic membrane (TM) area approximates twi …
Expression of glycogenic genes in the oviduct of Chinese brown frog (Rana dybowskii) during pre-brumation.
Fan C, Liu Y, Wang Y, Zhang A, Xie W, Zhang H, Weng Q, Xu M. Fan C, et al. Theriogenology. 2022 Jun;185:78-87. doi: 10.1016/j.theriogenology.2022.03.006. Epub 2022 Mar 18. Theriogenology. 2022. PMID: 35390592
The oviduct of Chinese brown frog (Rana dybowskii) displays seasonal morphological and functional changes, which expands specifically during pre-brumation. ...Moreover, immunohistochemical data showed that GLUT1, GYS, p-GYS, GSK-3beta and p-GSK-3beta were expressed regiona …
The oviduct of Chinese brown frog (Rana dybowskii) displays seasonal morphological and functional changes, which expands specifically …
Metabolic response of the Siberian wood frog Rana amurensis to extreme hypoxia.
Shekhovtsov SV, Bulakhova NA, Tsentalovich YP, Zelentsova EA, Yanshole LV, Meshcheryakova EN, Berman DI. Shekhovtsov SV, et al. Sci Rep. 2020 Sep 3;10(1):14604. doi: 10.1038/s41598-020-71616-4. Sci Rep. 2020. PMID: 32884088 Free PMC article.
The Siberian wood frog Rana amurensis is a recently discovered example of extreme hypoxia tolerance that is able to survive several months without oxygen. ...
The Siberian wood frog Rana amurensis is a recently discovered example of extreme hypoxia tolerance that is able to survive several m …
Relationship between serum thyroid hormones and their associated metabolites, and gene expression bioindicators in the back skin of Rana [Lithobates] catesbeiana tadpoles and frogs during metamorphosis.
Poulsen R, Jackman SH, Hansen M, Helbing CC. Poulsen R, et al. Front Endocrinol (Lausanne). 2023 Jan 18;13:1103051. doi: 10.3389/fendo.2022.1103051. eCollection 2022. Front Endocrinol (Lausanne). 2023. PMID: 36743912 Free PMC article.
Using state-of-the-art ultra-high performance liquid chromatography isotope-dilution tandem mass spectrometry, we targeted 12 THs and metabolites in the serum of Rana [Lithobates] catesbeiana (n=5-10) across seven distinct postembryonic stages beginning with premetamorphic …
Using state-of-the-art ultra-high performance liquid chromatography isotope-dilution tandem mass spectrometry, we targeted 12 THs and metabo …
Peptidomic analysis of the host-defense peptides in skin secretions of Rana graeca provides insight into phylogenetic relationships among Eurasian Rana species.
Mechkarska M, Kolodziejek J, Musale V, Coquet L, Leprince J, Jouenne T, Nowotny N, Conlon JM. Mechkarska M, et al. Comp Biochem Physiol Part D Genomics Proteomics. 2019 Mar;29:228-234. doi: 10.1016/j.cbd.2018.12.006. Epub 2018 Dec 27. Comp Biochem Physiol Part D Genomics Proteomics. 2019. PMID: 30599276

The most abundant peptide, MRP-GR significantly (P < 0.001) stimulated insulin release from BRIN-BD11 clonal beta-cells at concentrations 0.1 nM. Rana graeca (formerly Rana graeca graeca) and the morphologically similar Italian stream frog Rana italica Dub

…

The most abundant peptide, MRP-GR significantly (P < 0.001) stimulated insulin release from BRIN-BD11 clonal beta-cells at concentrations

…
Investigation of seasonal changes in lipid synthesis and metabolism-related genes in the oviduct of Chinese brown frog (Rana dybowskii).
Wang Y, Liu Y, Wang Y, Zhang A, Xie W, Zhang H, Weng Q, Xu M. Wang Y, et al. Eur J Histochem. 2023 Dec 20;67(4):3890. doi: 10.4081/ejh.2023.3890. Eur J Histochem. 2023. PMID: 38116875 Free PMC article.
A peculiar physiological characteristic of the Chinese brown frog (Rana dybowskii) is that its oviduct dilates during pre-brumation rather than during the breeding season. ...
A peculiar physiological characteristic of the Chinese brown frog (Rana dybowskii) is that its oviduct dilates during pre-brumation r …
Expression of leptin receptor in the oviduct of Chinese brown frog (Rana dybowskii).
Xi L, Liu Y, Tang Z, Sheng X, Zhang H, Weng Q, Xu M. Xi L, et al. Am J Physiol Regul Integr Comp Physiol. 2017 Jun 1;312(6):R912-R918. doi: 10.1152/ajpregu.00020.2017. Epub 2017 Mar 15. Am J Physiol Regul Integr Comp Physiol. 2017. PMID: 28298331 Free article.
The oviduct of Chinese brown frog (Rana dybowskii) expands specifically during prehibernation instead of in the breeding period. In this study, we investigated the expression of leptin receptor (Ob-Rb) in Rana dybowskii oviduct during the breeding period and prehibe …
The oviduct of Chinese brown frog (Rana dybowskii) expands specifically during prehibernation instead of in the breeding period. In t …
Oxidative damage and antioxidants in Rana sylvatica, the freeze-tolerant wood frog.
Joanisse DR, Storey KB. Joanisse DR, et al. Am J Physiol. 1996 Sep;271(3 Pt 2):R545-53. doi: 10.1152/ajpregu.1996.271.3.R545. Am J Physiol. 1996. PMID: 8853374
Freeze-tolerant wood frogs (Rana sylvatica) must endure prolonged ischemia on freezing. Reperfusion on thawing brings with it the potential or oxidative damage due to reactive oxygen species formation, a well-known consequence of mammalian ischemia-reperfusion. To determin …
Freeze-tolerant wood frogs (Rana sylvatica) must endure prolonged ischemia on freezing. Reperfusion on thawing brings with it the pot …
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