Thales Cesar de Padua Martins, Brazilian endocrinologist (Rio de Janeiro 29 September 1896 -Rio de Janeiro 31 July 1979) 

ACHIEVEMENTS

Performed original researches on comparative endocrinology and animal psychology

Obtained and assayed testicle interstitial hormone

Demonstrated the hypophysis regulation via gonads 

Performed researches about parabiosis independent from Kallas  

Performed impacting studies about hormones effect on motor function of genital musculature

Showed repetitious effect of injected extracts from anterior lobule of pituitary in laboratory animals attenuates progressively in time (anti-hormones)

Discovered independently Friedmann reaction (Friedman-Martins test)

With L. Fraenkel demonstrated the presence of corpus luteum in venomous ovoviviparous snakes ovaries 

O diagnóstico da gravidez pela pesquisa dos hormônios pré-hypophysarios da urina. Modificação da técnica de Aschheim-Zondek. Thesis. Faculdade do Rio de Janeiro, 1930  

Test rapide de l’hormone masculine mitoses dans la genitalia accessoire des males castrées. C.R. Soc. Biol. Paris 126:131, 1937

Test rápido para hormonio testicular, baseado na presença de motores na mucosa das vesículas seminais e de próstata (1937)

With J. Carneiro Felippe developed a new process for extracting hormones by absorption (1929) (patented)

With Arnoldo Rocha suggested the existence of a second testicle hormone in mammalians (1929) and developed a new test for male hormone that attained international repercussion

With Arnaldo Rocha authored important papers about hormonal regulation on sexual organs

Action des extraits testiculaires sur las vesicules séminales des souris chatrees. C.R. Soc. Biol. Paris 102:485, 1929

Influence de la castration, des greffes et des implantations des gonades sur le lobe antérieur de l’hypophyse. C.R. Soc. Biol. Paris 105:793-4, 1930

La regulation de l’hypophyse par le testicule. Experiences de parabiose. C.R. Soc. Biol. Paris 105:795-6, 1930

A regulação do lobo anterior da hipófise por um hormônio testicular, especialmente sob o ponto de vista morphológico. Mem. Inst. Oswaldo Cruz 25:73-80, 1931

Utilisation des alterations de l’hypophyse, consécutives à la castration, comme test d’une hormone testiculaire. C.R. Soc. Biol. 108:1080, 1931