Gilberto Guimarães Villela
Gilberto Guimarães Villela, Brazilian biochemist and microbiologist (Lavras, Minas Gerais State 12 July 1904 – Rio de Janeiro 17 July 1977) Discovered the activation of liver xanthine oxidase with carbon tetrachloride With A.M. Calcagnotto. Studies on the toxicity and absorption of a new chelate of aluminium and calcium. Rev. Bras. Pesq. Med. Biol. 6(3-4):165-9, 1973 Proposed a new interpretation of oedema formation in hookworm anemia in Mem. Inst. Oswaldo Cruz 6:55, 1929 DEVELOPED NEW TECHNIQUES/METHODS With M. Bacila. A rapid and sensitive method for the determination of xanthine oxidase activity using the oxygen electrode. Nature 184 (Suppl. 18):1394-5, 1959 A colorimetric method for assaying xanthine dehydrogenase activity Determination of rat liver xanthine dehydrogenase by triphenyltetrazolium chloride. Rev. Bras. Biol. 14:455-8, 1954 With A. Cury. A microbiological assay method for biotin. Proc. Soc. Exp. Biol. Med. 76(2):341-3, 1951 A new technique for isolation of the snake erythrocyte nuclei using tyrothricin Isolation and properties of snake erythrocyte nuclei. Exp. Biol. Med. 66(2):398-400, 1947 Um novo “test” ponderal para avaliação da atividade do hormônio cortical. Mem. Inst. Oswaldo Cruz 38(2):173-6, 1943 A technique for isolation of active protein fraction of lepromine Sur la fraction active de l’antigene de Mitsuda. Bull. Soc. Franc. Dermat. Syph. p.46, 1939 With A.M. Leal. A new color reation of vitamin B (thiamin, aneurin). Science 90 (2330):179, 1939 Técnica simples e precisa para dosagem dos protídeos totais no plasma. O Hospital 8:5, 1936 Micro-extractor para dosagem do cholesterol no sangue. Mem. Inst. Oswaldo Cruz 27(1):17-20, 1933 With M.I. de Mello. Um novo test para a avaliação da atividade biológica do princípio antianemico do fígado A method for determination of dehydrogenase activity Gilberto Villela technique for determination of urinary ascorbic acid rate (a modification of Harris-ray method) Villela reaction for determination of nicotinamide in blood Papers in Nature With R.R. Abreu & L.A. Abreu. Mucoids of some micro-organisms. Nature 196:582, 1962 With O.R. Affonso & E. Mitidieri. Effect of colchicine on rat blood serum xanthine oxidase. Nature 193:64, 1962 With O.R. Affonso & E. Mitidieri. Effect of colchicine on rat liver xanthine oxidase. Nature 192:666-7, 1961 Quinine oxidase in liver and blood plasma of rabbits poisoned with carbon tetrachloride. Nature 190:807-8, 1961 With M. Bacila. A rapid and sensitive method for the determination of xanthine oxidase activity using the oxygen electrode. Nature 184 (Suppl 18):1394-5, 1959 With O.R. Affonso, E. Mitidieri & L.P. Ribeiro. Detection of xanthine dehydrogenase activity in soluble proteins of rat liver separated by paper electrophoresis. Nature 178 (4531):492-3, 1956 Carotenoids of some Brazilian freshwater gastropods of the genus Pomacea. Nature 178 (4524):93, 1956 With E. Mitidieri & O.R. Affonso. Intracellular distribution of xanthine oxidase in the rat liver. Nature 175 (4468):1087, 1955 With E. Mitidieri. Rat liver xanthine oxidase in carbon tetrachloride poisoning. Nature 175 (4448):208-9, 1955 Ribosenucleic acid in snake erythrocyte nuclei. Nature 164 (4172):667, 1949 Papers in Science With A. Cury. On the pigments of Allescheria boydii. Science 112 (2911):430-1, 1950 With H.H. Anderson, E.L. Hansen & R.K. Reed. Some physical and biologic proteins of subtilin and other antibiotics. Science 103 (2675):419-20, 1946 Vitamin C in the needles of some conifers. Science 99 (2563):125, 1944 With A.M. Leal. A new color reaction of vitamin B1 (thiamin, neurin). Science 90 (2330):179, 1939 Vitamin B1 in cerebrospinal fluid. Science 89 (2307):251, 1939
Gerardo Varela
Gerardo Ignacio Varela Mariscal, Mexican bacteriologist (Oaxaca 03 October 1898 – Ciudad de Mexico 1977) Prepared a vaccine against typhus (1933) Discovered that colibacilli with Salmonella antigens were associated with diarrheal episodes in children leading to the identification of E. coli enteropathogens (first colibacillus known) With A. Aguirre & J. Carrillo. Escherichia-coli gomezi, nueva especie aislada de un caso mortal de diarrhea. Bol. Med. Hosp. Infantil 54:623-6, 1946 With A. Arroyo Borstein. First demonstration of the natural existence of Salmonella in donkeys. Rev. Invest. Salud Publica 26(3):201-4, 1966 Demonstrated that trench fever is transmitted by the body louse and caused by the bacterium Rickettsia quintana With C. Molina Pasquel & J.W. Vinson. Trench fever II. Propagation of Rickettsia quintana on cell-free medium from the blood of two patients. Am. J. Trop. Med. Hyg. 18:708-12, 1969 With J.W. Vinson & C. Molina Pasquel. Trench fever III. Induction of clinical disease in volunteers inoculated with Rickettsia quintana propagated on blood agar. Am. J. Trop. Med. Hyg. 18:713-22, 1969 DESCRIBED A number of bacilli With J. Zozaya described 3 new serotypes of Salmonella Salmonella mexicana 1942 with J. Zozaya & J. Olarte Serratia indoligena (1941) with J. Zozaya Aerobacter amigdalina 1943 with Olarte & Zozaya Papers in top journals With U.S. Kuhn, F.W. Chandler & G.G. Osuna. Experimental pinta in the chimpanzee. JAMA 206(4):829, 1968 With C. Ortiz Mariotte & R. Silva. Complement fixation in rat’s blood sera. Science 104(2700):303, 1946 With J. Olarte. Transmission of Salmonella enteritidis by Pulex irritans and Ctenocephalus canis. Science 104(2692):104-5, 1946 With J. Olarte. Salmonella isolated from human mesenteric lymph nodes. Science 99(2577):407-8, 1944 METHODS With R. Fournier Villada & H. Mooser. Nuevo tratamiento para la expulsión de los tricocefalos. Pediat. Asmericas 2:640, 1944 With J. Olarte. Methods for the isolation and classification of Salmonella and Shigella from fecal matter. Medicina 30(612):385-7, 1950 Tecnica para el estudio bacteriologico de las intoxicaciones de origen alimenticio (1951) With M.L. Zarate Aquino. Differentiation between classical and murine typhus by Giroud’s microagglutination. Medicina 44:297-9, 1964 With M.A. Bravo-Becherelle & R. Velasco. New method for the destruction of Pediculus humanus. Study on the ingestion of phenylbutazone in humans and rabbits. Salud Publ. Mex. 7(2):183-7, 1965 With M.E. Bustamante developed serological techniques for identification
Gerardo Vaca Guzmán
Gerardo Vaca Guzmán Moyano, Bolivian chemist and physician (Chuquisaca, Sucre 03 October 1849 – Tarija 17 August 1915) Invented a new procedure for extraction of silver from minerals Invented a procedure for treatment of argentiferous minerals with high content of lead and zinc employing precipitation (patented in USA) Other inventions about the use of argentiferous minerals involved the metallurgical techniques of silver Performed chemical and therapeutical analysis of Bolivian medicinal plants Descripción del procedimiento de extracción de la sacarida contenida en la semila del molle (Description of extraction procedure of saccharide from Schinus molle seed) Developed a special diastase for production of maize chicha (a corn drink)
Geraldo Vicentini
Geraldo Vicentini, Brazilian chemist (São Paulo 04 April 1928 – São Paulo 08 February 2003) Gained international recognition on Coordination chemistry of lanthanides Published 286 papers (186 in indexed reviews), 358 communications in meetings and circa 1.300 citations METHODS With A.K. Kontturi, K. Kontturi, J. Mattos, L.B. Zinner, F. Lehrich, C.J. Nielsen, D.L. Powell & M. Traetteberg. Determination of effective charge numbers for a polydisperse polyelectrolyte. An improvement which shortens the measuring time. Acta Chem. Scandinavica (1988) Eine allgemeine method zur Darstellung organischer Telluride. Chem. Berichte (1958) COMPOUNDS With J.D. Ayala, G. Bombieri & A. Pra. Synthesis and crystal structure of a new polynuclear lanthanum picrate complex with trans1,4-dithiane-1,4 dioxide. Inorg. Chim. Acta 274:236-8, 1997 With J.D. Ayala & G. Bombieri. Scandium picrate complex with trans-1,4 dithiane-1,4-dioxide (1995)
Georges Van Son
Georges Van Son, Russian-born South-African entomologist and horticulturalist (Narishkino, Orel 19 September 1898 – Pretoria 29 May 1967) From Dutch father and Russian mother DESCRIBED LEPIDOPTERA TAXA Genera Cassionympha 1955 Coenyropsis 1958 Dingana 1955 Durbaniella 1959 Durbaniopsis 1959 Mashuna 1955 Metanola 1933 Neita 1955 Nolidia 1933 Paralethe 1955 Paranola 1933 Stigionympha 1955 Vandamia 1933 Yphimomorpha 1955 Species About 150 HONORS Vanstaronia Kammerer 2006 (Coleoptera) Vansonium Koch 1950 (Coleoptera) Vansoniacris Dirsh 1958 (Orthoptera)
Gelso Vazzoler
Gelso Vazzoler, Brazilian oceanographer (São Paulo 25 August 1929 – São Paulo 20 May 1987) Gained international recognition for his works on fisheries biology and nektonic ecology SOME BIBLIOGRAPHY With P.T.C. Chaves. Aspectos biológicos de peixes amazônicos. III. Anatomia microscópica do esôfago, estômago e cecos pilóricos de Semaprochilodus insignis (Characiformes: Prochilodontidae). Acta Amazonica 14(3-4):343-53, 1984 With E.C. Kawakami. Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes. Bol. Inst. Oceanogr. 29(2):205-7, 1980 Distribuição da fauna de peixes demersais e ecologia dos Sciaenidae da plataforma continental brasileira entre as latitudes 29°21’S (Torres) e 34°44’S (Chuí). Bol. Inst. Oceanogr. 24(2):85-169, 1975 With A.E.A.M. Vazzoler. Relation between condition factor and sexual development in Sardinella aurita (Cuv. & Val.). Anais Acad. Bras. Cien. 37:353-9, 1965 Sobre a biologia da corvina da costa sul do Brasil. Bol. Inst. Oceanogr. S. Paulo 12(1):53-102, 1962 Sobre a primeira maturação sexual e destruição de peixes imaturos. Bol. Inst. Oceanogr. 12(2):5-38, 1961