Guillermo Berraz
Guillermo Berraz Gebhardt, Argentine chemist (Esperanza, Santa Fe Province 28 November 1899 – 10 April 1985) From Swiss ancestry Described a procedure for the separation of inorganic ions by the action of an electric current along a filter paper and suggested the term electrocromatography independently of Belgian H. Lecoq Electrocapillary analysis. Ann. Asoc. Quim. Argentina 31:96-7, 1943 & Anal. Inst. Invest. Cient. Technol. Univ. Nac. Litoral 12-3:67-9, 1943 DEVELOPED Viscosímetro rotativo electromagnetico (Rotary electromagnetic viscosimeter). Ann. Inst. Investig. Cient. Tecnol. 2:79-84, 1931 With E. Virasoro developed a new photo-electric pyrometer With Enrique Virasoro. Dispositivo para obtención de capas delgadas de selenio gris por sublimación en el vacio. Anales Soc. Cien. Arg (1941) Estudio experimental de un vacuometro termoelétrico. Anales Soc. Cien. Arg (1942) With E. Virasoro. Thallous sulfide photocells. Design and Characteristics (1963) A wire welding method
Guido Beck
Guido Beck, Austrian physicist in Latin America (Reichenberg 29 August 1903 – Rio de Janeiro 21 October 1988) Worked in Argentina (1943-51; 1963-75) and Brazil (1951-63; 1975-88) First to explain the α-anomalous scattering Demonstred that many features of photoelectric effect don’t mean evidence for the existence of photons independently of Wentzel (1927) With L. Horsley obtained a 1/v law independently of Fermi, Bethe, Perrin & Elsasser (1937) Described radioactive quantum field One of the first to discuss the concept of quasiparticle momentum (1954) Proposed a new space-time (1953) With P.S.M. Macedo a new representation of the spin variables Gave the first exact solution of Einstein’s field equations for gravitational waves as well as a demonstration that these equations don’t imply Mach’s principle (1926) Showed that the average behavior of a harmonic oscillator according to quantum mechanics is the same as that due to the radiation reaction in classical electrodynamics (1927) Developed a theory of scattering Discovered the process of pair creation in a Coulomb field independently of Oppenheimer & Plesset (1933) With K. Sitte developed a β-disintegration theory (1934) Proposed a layer model for atomic nucleus Discovered the law of conservation of lepton number (1935) before Konopinski and Mahmoud Derived a theorem about a definition of nucleon (1938) Gave an exact solution of the equations describing two fixed particles interacting with an uncharged scalar field (1939) BIBLIOGRAPHY P. Havas. Life and work of Guido Beck. Anais Acad. Bras. Ciencias 67(1-2) Suppl. (2005)
Gregorio Bondar
Gregorio Grigorievich Bondar, Ukrainian-born Brazilian agronomist (Zolotonosha District, Poltava Governorate, Ukraine 18 November 1881 – Salvador 20 February 1959) Authored over 200 scientific works DESCRIBED At least 12 new species of plants of family Arecaceae Nearly 400 new Insecta species 35 Genera and nearly 300 species of Coleoptera 11 Genera of Hemiptera 2 Genera of Thysanoptera PHYTOPATHOLOGY Discovered cassava bacterial blight Uma nova doença bacteriana das hastes da mandioca. Chácaras e Quintais 5(4):15-18, 1912. Described Xanthomonas campestris pv. manihotis, causal agent of cassava bacterial blight Molestia bacteriana da mandioca. Boletim Agricultura 16:513-34, 1915 Discovered target spot Insetos daninhos e moléstias da laranjeira no Brasil. Bol. Lab.Patol.Veg. Bahia 7:1-79, 1929. HONORS Bondaria Sampson & Drews 1941 (Hemiptera) Bondariella Hustache 1942 (Coleoptera) Bondarius Rosado-Neto 2006 (Coleoptera) Nearly 50 species bears his name
Graziela & Liberato Barroso
Graziela Maciel Barroso, Brazilian botanist (Corumbá, Mato Grosso do Sul State 11 April 1912 – Rio de Janeiro 05 May 2003) DESCRIBED PLANTAE TAXA Genera Angelphytum 1980 Baccharidiopsis 1975 Brasilia 1962 Glaziovianthus 1947 Irwinia 1980 Monogereion 1971 (with Robinson) Morithamnus 1979 Praxeliopsis 1949 Schizosepala 1955 Species 101 HONORS Algrizea Proença & Nic Lughadha 2006 (Myrtaceae) Barrosoa King & Robinson 1971 (Asteraceae) Grazielia King & Robinson 1972 (Asteraceae) Grazielodendron Lima 1983 (Fabaceae) Grazielanthus Peixoto & Pereira-Moura 2008 (Monimiaceae) Honored at least in 25 species of plants Millenium Botany Award, International Congress of Botany (1999) Married to botanist Liberato Joaquim Barroso (Fortaleza 15 August 1900 – Rio de Janeiro 09 October 1949), that described Schinus apparicianus 1947 and Dicranostyles falconiana 1945 Honored in genus Liberatia Rizzini 1947 (Acanthaceae)
Govind Dajiba Bhalerao
Govind Dajiba Bhalerao, Indian helminthologist (Wardha, Maharashtra State 10 December 1897 – 06 December 1948) GENERA DESCRIBED Trematoda Atrophacaecum 1940 Centrovitus 1926 Concinnus 1936 Conspicum 1936 Glossodiplostomoides 1942 Lubens 1936 Neocladorchis 1937 Pancreaticum 1936 Pneumotrema 1937 Skrjabinus 1936 Stunkardia 1927 Testifrondosa 1924 Testisaculus 1927 Travassosstomum 1938 Nematoda Bhalfilaria 1944 (with Krishna Rao) Varestrongylus 1932 Acanthocephala Leiperacanthus 1937 SPECIES At least 55 new helminth species HONORS (Trematoda) Bhaleraoia Srivastava 1948 Bhaleraopharynx Skrjabin & Antipen 1958
Gernot Bergold
Gernot Hildebrand Bergold, Austrian-born Venezuelan virologist (Oderfurt, Austria 19 June 1911 – Caracas 05 February 2003) Authored 85 works Described the rod-shaped nature of baculovirus virions (1943) First to demonstrate crystalline bodies of polyhedrosis under electron microscope (1947) First demonstrated yellow fever virus under electron microscope Identified and demonstrated the morphology of arenavirus group members such as Tacaribe, Junín, Machupo and others Demonstrated the ultrastructure of a number of arthropod-borne virus With F. Herold & J. Weihel isolated and demonstrated under electron microscope Rhabdoviruses in plants (1960) First demonstrated polyheder virus in electron microscopy in Isolation of the polyheder virus and the nature of polyheders. Zeitschr. Naturfors. 2B: 122-43, 1964 Described two orchid species: Sudamerlycaste dunstervillei 1996 & Coryanthes lagunae 2004 with Manara INVENTED A device for preparation of primary cell cultures used in growing yellow fever virus A device for plate counting in cell cultures With Octavio Suarez. A little metal needle adapted to a glass microcapillary for inoculating virus in mosquitoes A nebulizer for concentrated virus suspensions HONORS Bergoldia Steinhaus (Virus) LINKS http://www.cazadoresdemicrobios.com.ve/consulta_biografia.php?id_biografia=73 (Spanish)