Mahmoud Ahmed El Sherbini
Mahmoud Ahmed El Sherbini, Egyptian atomic physicist (Menial Al Kamh, Sharqia 22 January 1909 – 11 June 1998) Authored papers with great recognition in scientific circles The Stark effect for strong fields. Philos. Magazine 14(7):384-6, 1932 Did pioneering work on crystal rectification With Y.L. Youssef. The effect of cooling and of magnetic fields on crystal rectification. Proceed. Phys. Soc. 51:449, 1939 Reversal of rectification by heat in crystal contacts and its analogy to a thermos-electric phenomenon. Proc. Phys. Soc. Lond. 53:120-5, 1941 With Y.L. Youssef. Dependence of the direction of rectification in copper pyrites on voltage, temperature and time of measurement. Nature 147 (3731):543, 1941 Discovered inverse rectification at low temperatures With Y. Leito. Effect of temperatures on crystal rectification at low temperatures (1938) SOME BIBLIOGRAPHY Copper beryllium alloys as secondary electron emitters (1961) With A. S. El Meligy. Energy levels for the Coulomb potential with cut-off. Zeitschr. fur Angew. Mathem. Physik ZAMP 10(5):474-7, 1959 With I.L. Abdallah. Formation of surface layers under ultrasonic agitation for investigations on secondary electron emission. Proc. Math. Phys. Soc. Egypt 4:45-52, 1956 With S.R. Haddara. Secondary electron emission and surface structure. Proc. Math. Phys. Soc. Egypt 3(3):25-36, 1949 Third order terms in the theory of Stark effect. Philos. Magazine 13(7):24-8, 1932 Three-dimensional periodic orbits in the field of a non-neutral atom. Philos. Magazine 14(7):303-10, 1932 Electron reflection in the low energy region. Thesis (1932) A simple thermal milliammeter
Luis Enrique Erro
Luis Enrique Erro Soler, Mexican astronomer (Villa de Chalco, Ciudad de Mexico 07 January 1897 – Ciudad de Mexico 18 January 1955) Discovered at least 20 new variable stars SOME BIBLIOGRAPHY With S. Gaposchkin. On the eclipsing system of RZ Cassiopeiae Variable stars in high latitude field 354. Bull. Harv. Coll. Obs. 913 (1940) HONORS Lunar Erro crater His nephew, Braulio Iriarte Erro, Mexican astronomer (Ciudad de Mexico 11 April 1920 – San Andrés Choula, Puebla State 13 August 1986) Determinated light curvature of DYPegasus With W. A. Hiltner & H.L. Johnson determinated the color diagrams of galactic clusters With G. Haro & E. Chavira discovered a great number of planetary nebulae or T-Tauri stars DISCOVERED NEW STARS (with E.Chavira) New blue giants between galactic coordinates 1=345º to 1=35°. Bol. Obs. Tonantzintla Tacubaya 2(11):27, 1954 (176) Gigantes azules entre 1=330° y 1=35°. Bol. Obs. Tonantzintla Tacubaya 2(13), 1955 (110) Nuevas estrellas de tipos espectrales tempranos con Hα en emission entre 1=338° y 1=33°. Bol. Obs. Tonantzintla Tacubaya 2(13), 1955 (79) Lista de estrellas con Hα en emision entre 1=338° y 1=33°. Bol. Obs. Tonantzintla Tacubaya 2(14), 1956 (58) Estrellas azules en el casquete galactico norte. Bol. Obs. Tonantzintla Tacubaya 2(16), 1957 (817) SOME BIBLIOGRAPHY With W.A. Hiltner & H.L. Johnson. The galactic cluster NGC6633. Astrop. J. 127:539, 1958 With H.L. Johnson & R.I. Mitchell. The color-magnitude diagram of the Hyades cluster. Astrop. J. 136:175, 1962 With H.L.Johnson & R.I. Mitchell et al. Five-color photometry of bright stars. Sky & Telescope 30(1):21-31, 1965 With H.L. Johnson & R.I. Mitchell. UBVRIJKL photometry of the bright stars. Comm. Lunar Photom. Labor. 4(3), 1966 With E. Chavira & O. Cardona. Changes in the Be stars of Cassiopeiae-Perseus region Photoelectric photometry of faint blue stars at high galactic latitudes Spectral types for the brightest flare stars in the Pléiades. Bol. Inst. Tonantzintla (1975)
Lindsay Atkins Eddie
Lindsay Atkins Eddie, South African astronomer and meteorologist (Cape Town 1845 – Grahamstown 13 October 1913) Made important observations on Mars planet (1907) SOME BIBLIOGRAPHY Gale’s comet (1912) Curious meteor trail seen at Grahamstown (1895) Spectrum of Y Argus. Popular Astron. 3:123-7, 1895 Note on an auroral display. J. Brit. Astron. Assoc. 4:381, 1894 The Short Period Variable 5 Cepheid HONORS Eddie crater on Mars
Khaled El Shazly
Khaled A. El-Shazly, Egyptian microbiologist and veterinary nutritionist (Tanta 14 January 1923 – Discovered volatile fatty acids of branched chains as products of fermentation in the rumen (1952) Discovered a Stickland type reaction METHODS With R.E. Hungate described a simple technique for measuring the rate of fermentation of rumen microorganisms (1965) With R.E. Hungate. Method for measuring diaminopimelic acid in total rumen contents and its application to the estimation of bacterial growth (1966) Naga-El Shazly method for counting rumen protozoan (1969) With A.M. Nour & A.R. Abou-Akkada. A method for determining 2-aminoethane-phosphonic acid in rumen contents (1975) Described a technique for determining fermentation rates in the rumen
Juan Egaña
Juan Egaña Risco, Chilean scholar (Lima 31 October 1768 – Santiago de Chile 29 April 1836) From Chilean father and Peruvian mother He was a member of Governing Junta that ruled Chile (1813-4) INVENTIONS A type writer (1825) A kind of musical language Many electrical devices
Jose Esculies
José Esculies Peris, Paraguayan pharmacist and chemist (Asunción 29 August 1906 – 20 May 1971) Developed Esculies reaction for cancer diagnostics Sobre la existencia de una substancia especifica en el suero de los cancerosos y su posible utilización terapêutica Nuevo diagnostico del câncer Nuevos resultados obtenidos con nuestra reacción serológica para el diagnostico del câncer Developed a method for separation and dosage of direct and indirect bilirrubine Metodo original del autor para separar y dosificar em el suero sanguíneo las dos bilirrubinas, directa y indirecta. Anal. Fac. Quim. Farm. Montevideo With B. Varela Fuentes. Nouvelle methode pour la séparation et le dosage des deux bilirubines (directe et indirecte) du sérum sanguin. Compt. Rend. Soc. Biol. 107:884, 1931 With B. Varela Fuentes & P. Recarte. Methode simplifique pour la separation et le dosage isolé des deux bilirubines, directe et indirecte, du sérum sanguin dans les ictérics. Compt. Rend. Soc. Biol. 108:1009, 1931