Alfred Polson
Alfred Gustave Polson, South African biochemist (Brandfort, OFS 11 March 1912 – 2001) Demonstrated the possibility of protein fractioning of plasma by polyethylene glycol precipitation (1964) Developed a number of techniques for separation and purification of animal and plant viruses such as precipitation by polyethylene glycol New amino acids in bacterial hydrolysates. Nature, 1948 METHODS/TECHNIQUES A new method for measuring diffusion constants of biologically active substances. Nature 154:223, 1944 A quantitative chromatographic method of analysis on filter paper (1948) With J. Dent & S.M. Lawrence. Improved diluents for the production of African horse-sickness virus vaccine. Nature, 1951 With G. Selzer. A rapid method for the purification of the MEF 1 strain of poliomyelitis virus. Biochim. Biophys. Acta 14:67, 1954 A method for determination of diffusion coefficients by the gel precipitin techniques. Biochim. Biophys. Acta 29:426, 1958 A new method for measuring diffusion constants (1960) With M.H.V. Van Regenmortel. A new method for determination of sedimentation constants of viruses. Virology 15(4):397-403, 1961 A simple procedure for forming density gradients (1963) With B. Russel & T.H. Mead. A method of preparing agarose. Biochim. Biophys. Acta 86, 1964 With M.B. Von Wechmar. A new way to transmit plant viruses. J. Gen. Virology 51:179-81, 1980 With H. Alk & K. Achleitner. The sedimenting-droplet procedure for measuring fluid densities. Anal. Biochem. 107(1):25-31, 1980 With H. Epstein & K.J. Van der Merwe. A novel method of electrophoresis for the separation of individual human serum glycoproteins. Prep. Biochem. 17(2):109-20, 1987 Electro-extraction method and apparatus for rapid extraction of viruses from infected plant tissues (1993) DEVICES An electrophoresis apparatus for the rapid routine analysis of sera and other protein solutions. Ondersteport J. Vet Research 20:159, 1944 Electrophoresis apparatus for analyzing several sera simultaneously. Nature, 1951 Improved electrophoresis cell for the analysis of several sera simultaneously. Nature, 1952 A electrodecantation apparatus for isolation and purification of protein and viruses (1953) A simplified fraction collector for gradient elution chromatography. J. Chromat. A 5:116-20, 1961 With L. Stannard a centrifugal rotor for concentrating viruses (1970) A new capillary cell for measuring the rate of sedimentation of virus particles in a centrifugal field PATENTS Method and apparatus for electro-decantation and its application for the separation of materials (1958) Fractionation of mixtures of agarose and agaropectin (1965) Chemically hardened gelatin-separating medium for chromatography and ion exchange and method for making the same (1972) with W. Katz Ultracentrifuge rotor (1974) with K.J. Kaufmann Influenza virus vaccine (1976) Recovering purified antibodies from egg yolk (1982) Carrier bound immunosorbent (1983) with K. J. Van der Merwe Carrier bound immunogenic determinants (1983) with K. J. Van der Merwe Manufacture and use of fowl egg antibodies (1985) Carrier bound immunogenic determinants and carrier therefor (1990) with K. J. Van der Merwe
Alexandrino Pedroso
Alexandrino de Moraes Pedroso, Brazilian bacteriologist (Cotia, São Paulo State 1881 – São Paulo 1922) With E. Brumpt first reported the importance of pets in epidemiological cycle of American cutaneous leishmaniasis (1913) With José Maria Gomes observed first chromoblastomycosis or Lane-Pedroso-Gomes disease (1911) but didn’t publish until 1920, losing his priority to Max Rudolph. Its etiologic agent was named Fonsecaea pedrosoi in his honor With J.M.Gomes. Sobre quatro casos de dermatite verrucosa produzida por Phialophora verrucosa. An. Paul.Med. Cir. 11:53-1, 1920 With Pedro Dias da Silva first to growing Leishmania brasiliensis in culture Introduced improvements in Nicolle medium
Alejandro Posadas
Alejandro Posadas Martínez, Argentine physician and surgeon (Saladillo, Buenos Aires Province 28 December 1870 – Paris 21 November 1902) First described coccidioidomycosis or Posadas-Wernicke disease and its histopathology Un nuevo caso de micosis fungoidea con psorospermia. Circulo Med. Arg. 15:585-97, 1892 Modified Delorme incision to treat infected pleural effusions becoming a hydatid delivery with partial and temporary thoracoplasty, pulmonary anchorage, cyst treatment and wound closure without drainage (Posadas operation) Cirurgia del pulmón (lesiones asepticas). Toracoplastia temporaria y parcial para la extirpación de los quistes hidatidicos de pulmon. Thesis (1898) Developed subperiostal amputations Developed Posadas procedure for treatment of inguinal hernia Developed fugitive thoracoplasty technique with muscle flap First reported exeresis of a pulmonary cyst Performed first scientific movie about a surgery in the world (1897) Eponym of Chutro-Posadas fracture
Alejandro Piatnitzky
Alejandro Matveevich Piatnitzky, Russian-born Argentine geologist (Russia 14 December 1879 – Buenos Aires 28 December 1959) DESCRIBED FOSSIL MOLLUSCA SPECIES (1938) Natica shehuena Pterotrigonia (Rinetrigonia) feruglioi Trigonia palaeopatagonica Trigonia rolli SOME BIBLIOGRAPHY Relaciones estratigráficas de la region del Río Chubut. Bol. Inf. Petroleras 23(259):173-85, 1946 Apuntes sobre la composición y estrutura geológica del Golfo de San Jorge. Bol. Inf. Petroleras 19(219):49-63, 1942 Observaciones geológicas al Oeste de Santa Cruz (Patagonia). Bol. Inf. Petroleras 13(165):45-85, 1938 Estudio geologico de la región del Río Chubut y del Río Genua (Patagonia Central). Bol. Inf. Petroleras 13(137):83-118, 1936 Retico y Liasico de los valles de los ríos Genua y Tecka y sedimentos continentales de la sierra de San Bernardo (Patagonia). Bol. Inf. Petroleras 9(113):151-82, 1933 Observaciones estratigráficas sobre las tobas com mamíferos del Terciário inferior em el valle del Río Chico (Chubut). Bol. Inf. Petroleras 8(103):617-34, 1931 HONORS (Fossil) Piatnitzkysaurus Bonaparte 1979 (Reptilia) Piatnitzkyceras Medina & Riccardi 2005 (Ammonites) Piatnitzkya Taboada 1993 (Brachiopoda) LINKS http://books.google.com.br/books?id=xlOV3M2tUgYC&pg=PA442&lpg=PA442&dq=alejandro+piatnitzky&source=bl&ots=K3XBaYO6HZ&sig=bSavoOE_pEXOj8zOOk1wGVn0U3A&hl=pt-BR&sa=X&ei=y7ptU7j1C6XmsATwvIGYBA&ved=0CCwQ6AEwAA#v=onepage&q=alejandro%20piatnitzky&f=false
Alejandro C. Paladini
Alejandro Constantino Paladini, Argentine biochemist (Buenos Aires 19 April 1919 – 15 September 2012) With L.F. Leloir identified and isolated 2 new coenzymes (1948) With R. Caputto, C.E. Cardini and L.F. Leloir discovered sugar nucleotides, determined its chemical nature and showed that play a key role in sugar interconversion and polysaccharides synthesis (1948) Established the structure of antibiotic tyrocidine A (1951-2) With J.M. Dellacha, J.A. Santomé & M.A. Enero isolated and characterized ovine growth hormone (1970) With J. A. Santomé & J.M. Dellacha elucidated amino acid sequence and the structure of bovine growth hormone (1973) With R.D. Conde, J.A. Santomé & J.M. Dellacha isolated, characterized and purified equine growth hormone (1973) With Pena, Medina, Novas & De Robertis discovered N-butyl-β-carboline-3-carboxylate that binds to cerebral benzodiazepine receptors (1986) With J.H. Medina, H. Viola & C. Wolfman proposed flavonoids as a new family of benzodiazepine receptor ligands (1997) METHODS/TECHNIQUES With Morris developed a method for determination of angiotensin in blood With E. Braun-Menendez & O.A. Scornik. Further improvements on a method for the estimation of angiotensin in blood. Acta Physiol. Lat. Am. 10:64-7, 1960 With N. Gonzalez Cadavid. Automatic amino acid analysis: reagent and instrumental improvements. Anal. Biochem. 9:170-4, 1964 Eponym of Paladini-Leloir solvent PATENTS With B.K. Cassels, F.J. Dajas, J.H. Medina & R.H. Silveira. Flavonoid and biflavonoid derivatives, their pharmaceutical compositions, their anxiolytic activity US5756538 (1998) & US 6004998 (1999) With J.H. Medina. Use of nitroflavonoids for the treatment of anxiety. US6080780 (2000)
Alcides Prado
Alcides Prado, Brazilian zoologist and physician (Limeira, São Paulo State 23 August 1893 – Santos, São Paulo 08 January 1963) DESCRIBED NEW TAXA Valid Reptilia Species Apostolepis goiasensis 1942 Atractus andinus 1944 Atractus arangoi 1939 Atractus biseriatus 1941 Atractus indistinctus 1940 Atractus manizalesensis 1940 Atractus sanguineus 1944 Atractus variegatus 1942 Atractus vertebrolineatus 1941 Atractus wagleri 1945 Siphlophis worontzowi 1940 Thamnodynastes rutilus 1942 Bacteria Bartonella pseudocebi 1927 with Pessoa Arachnida Bothriurus melloleitaoi 1934 Centruroides danieli 1939 with Rios-Patino Rhopalurus dorsomaculatus 1938 Rhopalurus goiasensis 1939 Diptera Coquillettidia albifera 1931 Uranotaenia ditaenionota 1931 With Fonseca 1932 Genus Townsendmyia Species Coenosia flavicauda Ctenoprosballia butantani Homoneura fasciventris Lauxania fasciata Lauxania javanensis Oxysarcodexia amarali Peckia florencioi Phobeticomyia preapicalis Ravinia belforti Sarcophaga townsendi Stephanostoma argenteum Stephanostoma humerale