Srinivasa Iyengar Ramanujan
Srinivasa Iyengar Ramanujan, Indian mathematician (Erode, Tamil Nadu 22 December 1887 – Chetput, Madras 26 April 1920) Discovered mock theta functions (1920) Imagined a method for calculating the value of π number Derived a formula for determination of quantity of primes lower than a given previously number Discovered properties of congruency, symmetry and other kinds of relations First to discover some arithmetical properties of p(n), the number of unrestricted partitions of n EPONYMY Hardy-Ramanujan-Littlewood circle method Roger-Ramanujan identities (1913) Rogers-Ramanujan continuous fraction Hardy-Ramanujan number Ramanujan conjecture Ramanujan congruence Ramanujan theta function Landau-Ramanujan function Landau-Ramanujan constant Ramanujan primes (1919) Ramanujan sum (1918) Ramanujan summation Ramanujan-Soldner constant Ramanujan expansion (1918) Ramanujan-Eisenstein series Ramanujan-Sato series Ramanujan-Dirichlet series Hardy-Ramanujan series Hardy-Ramanujan-Rademacher asymptotic partition formula (1918); Hardy-Ramanujan inequalities Ramanujan graphs Ramanujan-Petersson conjecture Ramanujan constant Ramanujan tau function or Ramanujan congruences (1916) Ramanujan-Nagell equation (1913) Ramanujan-Skolem theorem Dougall-Ramanujan identity Nielsen-Ramanujan constant
Sol Rabasa
Sol Libertario Rabasa, Argentine geneticist and oncologist (Teodelina, Santa Fe Province 25 February 1915 – Rosario 22 April 2006) CONTRIBUTIONS With S.M. Martinez, M.C. Tarres, M.M. Liborio, H. Robledo & J.C. Picena. Modelo murino de la diabetes clinicamente benigna de los jovenes (MODY). Medicina (B Aires) 44:145-52, 1984 With L. Rumi, M.E. Colmerauer, R. Braylan & C.D. Pasqualini. Phenomenon of enhancement associated with murine leukemia. Medicina 31(5):372-6, 1971 Methods With F. Bergmann. A method to measure the renal sensitivity to ADH in the rat. Acta Physiol. Latinoam. 14:89, 1964 With F. Bergmann. A method to reduce the individual variation in antidiuretic assay. Endocrinology 60(5):597-601, 1957 Papers in Nature With L. Kravetz de Srulijes, E.A. Holmberg & A. Pavlovsky. Nucleic acids of malignant and benign splenic hyperplasias in mice. Nature 209 (5027):1038-9, 1966 With E.A.D. Holmberg, A. Pavlovsky & C.D. Pasqualini. Fertility of mice treated with radiophosphorus. Nature 187, 876, 1960 Genetical reduction of a reproductive unit in relation to the male-female ratio. Nature 166:821-2, 1950 SOME BIBLIOGRAPHY With A.M.S.G. Samartino. Base genética de la hipertensión arterial. Rev Arg Cardiol 54: 217, 1986 With M.C. Tarres, S.M. Martinez, M.M. Liborio & J.C. Picena. Efecto del ambiente nutricional sobre 1a expresion del sindrome diabetico de las ratas eSS. Medicina 46: 429-34, 1986 With G. Celoria, L. Hinrichsen & M.T. Font. Correlación entre la actividad mitótica y el infiltrado linfohistiocitario y su asociación con la velocidad de crecimiento de un sarcoma de rata. Medicina (Bs Aires) 38:241, 1978 With A. R. Sal Paz, F. Sal Paz & F. Bergmann. Asociación de fertilidad femenina con genes mendelianos mayores en bovinos Criollos. Mendeliana 1:91-6, 1976 With C. Rabasa, A. Sal Paz, F. Sal Paz & F. Bergmann. Genética de pelajes en bovino Criollo. Mendeliana 1 (2): 81-90, 1976 With L. Rumi & C.D. Pasqualini. Growth of sarcoma 180 in splenectomized mice bearing diffusion chambers containing spleen or tumor cells. Eur. J. Cancer 7:551, 1971 With F. Saal & C. D. Pasqualini. Study of the Gross antigen in BALB leukemias and tumors of different origin. Cancer Res. 31:23-6 (1971) With C.D. Pasqualini, F. Saal & R.C. Braylan. Induction of leukemia in BALB/c mice by allogeneic AKR leukemic cells. Int J Cancer 5:338-45, 1970 With M.E.M. Colmerauer & C. Dosne Pasqualini. Effect of normal tissue ribonucleic acid on a murine leukemia transplant. Medicina (Bs. Aires) 30:447, 1970 With F. Saal & C. Dosne Pasqualini. Acción leucemógena de los rayos X en ratones BALB; efecto de la esplenectomia. Medicina (Bs. Aires), 30: 365, 1970 With E.A.D. Holmberg & C.D. Pasqualini. Biological action of radioactive 32P in mice. Medicina 28 Suppl 1: 152-60, 1968 With C.D. Pasqualini, A. Pavlovsky & E.A. D. Holmberg. Development of murine leukemia after inoculation of human lymphomas. Cancer Res 28: 788, 1968 With C.D. Pasqualini & F. Saal. Murine leukemia, Medicina (Buenos Aires) 28 Suppl.1 116, 1968 (in Spanish) With M.V. Londner, J.C. Morini & M.T. Font. RNA-induced immunity against a rat sarcoma. Experientia, 24: 598, 1968 With E.A.D. Holmberg, C. Vasquez, C. Dosne Pasqualini & A. Pavlovsky. Acellular passage of 32P-induced leukemia: an electron microscopic study. Cancer Res. 27:198-204(1967) With F. Bergmann & I.A. Gioia. Influencia de las concentraciones de sodio y urea sobre la relación densidad/osmolaridad de la orina de rata. Medicina (Bs. Aires), 26: 323,1966 With C.D. Pasqualini, A. Pavlovsky, C. Vasquez & E.A.D. Holmberg. Leukemia of short latency in mice injected with human malignant tissue by intrasplenic route. Cancer Res. (May 1965) With E.A.D. Holmberg, C.D. Pasqualini, E. Arini & A. Pavlovsky. Sterility due to radioactive phosphorus in mice. Acta Radiol. 2:337-44, 1964 With E.A. D. Holmberg, C. Dosne Pasqualini, E. Arini & A. Pavlovsky. Leukemogenic effect of radioactive phosphorus in adult and fetally-exposed BALB mice. Cancer Res. 24:1745, 1964 With M.T. Font. Cría y selección de la rata blanca. Ciencia e investigación 19: 133, 1963 With C.D. Pasqualini, E.A.D. Holmberg & A. Pavlovsky. Leukemia induced by Sarcoma 180 and the development of reciprocal immunity. Cancer Res 23: 974, 1963 With C.D. Pasqualini, E.A.D. Holmberg & A. Pavlovsky. Immunity to Sarcoma 180 and the induction of a leukemia-like condition. Cancer Res 21: 387-9, 1961 With Frida Bergmann. Nephrogenic diabetes insipidus induced by aminopterin. Acta physiol. lat.-amer. 4: 42 (1954) Growth rate of the white rat in relation to the number per cage. Physiol. Zool., 25: 98-103, 1952 With J.T. Lewis & A.D. Domenico. Effects of Cortisone and DOCA on Intoxication by 4sAminopteroylglutamic Acid in Normal and Adrenoprival Rats. Rev. Soc. argent. Biol., 28: 93, 1952 (in Spanish) With J.T, Lewis & A.D. Domenico. Effects of a Single Dose of 4-aminopteroylglutamic Acid (Aminopterin) in the White Rat. Rev. Soc. argent. Biol. 28: 84, 1952 (in Spanish) With L. Bentolila. Spontaneous animal allergy: report of a case. Ann. Allergy 9(4):477-80, 1951
Sivaraj Ramaseshan
Sivaraj Ramaseshan, Indian physicist (Calcutta 10 December 1923 – Bangalore 29 December 2003) Relative of Nobel prize winners being nephew of physicist C.V. Raman and cousin of astrophysicist Subramanyan Chandrasekhar Performed studies on optics, magnetooptics, solid state physics and crystallography Authored 178 papers With K. Venkatesanm & N.V. Mani proposed a novel method for determining the phase angles without ambiguity in non-centro-symmetric crystals that formed the basis of the Multiple Anomalous Dispersion (MAD) in 1957 First to solve the structure of centrosymmetric crystals Established the multiwave anomalous x-ray scattering method for the determination of phases of reflection Proposed the use of anomalous neutron scattering for resolving very large structures Showed theoretically that anomalous scattering of neutrons can yield information on the polarization vectors of lattice waves and described detailed experimental procedures for their determination in centro- and non-centrosymmetric crystals Recognized the possibility of using anomalous scattering of x-rays coupled with multiple wavelength method to obtain the structure of amorphous or liquid binary systems Showed that the resistivity anomaly in liquid caesium is due to anomalous electron scattering during the Fermi 6s-5d electron collapse Formulated and verified laws governing cleavages in crystals Discovered icosahedral coordination in ionic solids Developed new techniques for low-temperature crystallography Predicted pressure-induced optical activity Predicted and verified the existence of pressure-induced liquid crystallinity Determined the critical point in solid-solid isostructural transformation of SmS Developed instrumentation for high and low temperature x-ray crystallography LINKS http://www.ias.ac.in/academy/ramasesan_pop.html nal-ir.nal.res.in/4884/1/valluri.pdf
Silvano Raia
Silvano Mario Attilio Raia, Brazilian surgeon (São Paulo 01 September 1930 – From Italian parents With S. Mies & J.R. Nery described and carried out the first liver transplant between living donors in the world (1988) DESCRIBED TECHNIQUES/METHODS Developed an innovative technique in which hepatic cells from a same donor (IPS cells) are 3D bioprinted and used in transplants With M. Zatz, E. Goulart, L.C. Caires Jr., K.A. Telles-Silva, B.H.S. Araújo, S.A. Rocco, M. Sforca, I.L Sousa, G.S. Kobayashi, C.M. Musso, A.F. Assoni, D. Oliveira, E. Caldini & P. I. Telkes. 3D bioprinting of liver spheroids derived from human induced pluripotent stem cells sustain liver function and viability in vitro. Biofabrication (2019) Developed the first extracorporeal perfusion of a liver isolated from a pig using human blood with uncommon functional performance in the medical literature (1970s) With S. Mies. Temporary hepatic assistance. IV. System and technic for the isolated perfusion of the porcine liver. Rev. Hosp. Clin. Fac. Med. S. Paulo 30(2):155-60, 1975 First technique to isolate at cellular level indirect bilirubin from conjugated bilirubin Histochemical demonstration of conjugated and unconjugated bilirubin using a modified diazo-reagent. Nature 205:304-5, 1965 Histochemical separation of conjugated and unconjugated bilirubin and its assessment by thin layer chromatography. J. Histochem. Cytochem. 18(2):153-8, 1970 Technique for hypotonic duodenography with double contrast Duodenografia hipotonica com insuflação gasosa para estudo morfológico da mucosa duodenal pela técnica do duplo contraste (1965) With L. Kreel. Gas-distension double contrast duodenography using the Scott-Harden gastroduodenal tube. Gut 7:420-4, 1966 Technique for resection of V and VI segments With S. Mies. Anatomic resection of liver segments V and VI. Surgery 103(3):374-5, 1988 Technique for splenocaval anastomosis With A. Teixeira da Silva. Selective portal decompression through splenocaval anastomosis using a Dacron prosthesis. Rev. Hosp. Clin. Fac. Med. São Paulo 30(1):69-76, 1975 Segmental hepatic vascular exclusion With S. Mies & P.C.B. Massarollo. Segmental hepatic vascular exclusion for resection of tumors involving the liver and the inferior vena cava. Surg. Gynecol. Obstetr. 176:86-8, 1993 With S.Mies. A simple method for controlling hemorrhage during hepatectomy. Surg. Gynecol. Obstet. 168(3):265-6, 1989 With S. Mies, C.G. Almeida, C.E. Xavier et al. Portacaval anastomosis in the rat: technic and results. Rev. Hosp. Clin. Fac. Med. S. Paulo 38(6):226-30, 1983 With E. Strauss, E. Schmidt & J. Kieffer. Intra-hepatic percutaneous deposition of radioactive xenon (133Xe) as a means of measuring hepatic blood flow. Hepatogastroenterology 27(2):99-103, 1980 With P.J. Scheuer. Method for obtaining both frozen and paraffin sections from the same liver biopsy. J. Clin. Pathol. 21(3):413-4, 1968 Intra-operative biopsy of the pancreaticoduodenal area with the freezing method. Technic and diagnostic value in 20 cases. Rev. Hosp,. Clin. Fac. Fac. Med. São Paulo 18:315-32, 1963 With H. Haselmann, L.C. Junqueira, A. Sesso et al. A method for microcinematography of secretory processes in the pancreas of the white mouse. Mikroskopie 8(11-2):400-5, 1953 OTHERS With S. Mies developed a hemostatic tape for liver resections HONOURS Leader Meeting of Transplantation Society Medal (2009)
Sergio Machado Rezende
Sergio Machado Rezende, Brazilian physicist (Rio de Janeiro 03 October 1940 – Authored about 230 papers and 6 books With F.M. de Aguiar obtained the first experimental observation of chaotic dynamics in excited magna by parallel pumping in Physical Review Letters 56:1070-3, 1986 With Antonio Azevedo first to report chaos control in magnetic systems, being the first time in any physical system in Physical Review Letters 66:1342-5, 1991 With A. Azevedo, C. Chesman, F.M. Aguiar, X. Bian & S.S. Parkin first to note biquadratic coupling in ultra-thin films in Physical Review Letters 76:4837-40, 1996 With F.M. de Aguiar, M.A. Lucena & A. Azevedo first direct observation of magna excitation by spin injection into ultra-thin films in Physical Review Letters 84:4212-5, 2000 Demonstrated the value of substances magnetic field could fluctuate arbitrarily featuring a chaos state Discovered new properties of multilayers and magnetic nanostructures Discovered that phonons can have magnetic spin With J. Holanda, D.S. Maior & A. Azevedo. Detecting the phonon spin in magnon-phonon conversion experiments. Nature Physics (2018)
Sergio de Almeida Rodrigues
Sergio de Almeida Rodrigues, Brazilian marine zoologist (São Paulo 10 June 1937 – São Paulo 14 October 2003) Nephew of medical mycologist Floriano Paulo de Almeida Internationally respected as an authority on Thalassinid Crustaceans DESCRIBED VALID MARINE TAXA Crustacea Genera Marcusiaxius 1972 with Carvalho Poti 1992 with Manning Species Aegla perobae 1977 with Hebling Axianassa australis 1992 with Shimizu Biffarius delicatulus 1992 with Manning Ctenocheles holthuisi 1978 Eucalliax cearaensis 1992 with Manning Lepidophthalmus sinuensis 1991 with Lemaitre Lepidophthalmus siriboia 1993 with Felder Marcusiaxius lemoscastroi 1972 with Carvalho Paraxiopsis pindatyba 1991 with Rodrigues Poti gaucho 1992 with Manning Sergio guara 1971 Sergio guassutinga 1971 Sergio mirim 1966 Tunicata Botryllus tabori 1962 Pyura mariscata 1966 Pyura millari 1966 HONORS Sergio Manning & Lemaitre 1994 (Crustacea)