Jorge Magnin
Jorge Magnin, French-born Argentine chemist (Annecy 22 December 1878 – ?) With Hector Bolognini. Nuevo typo de horno para fusión de vidro With E. Zappi proposed Dragendorff procedure for extraction of alkaloids from animal matter in Annal. Soc. Quim. Arg. 1:327-61, 1913 Nouvelle methode de destruction de la matiere organique par le brome, applicable à la toxicologie. Compte Rendu 2:864, 1913 Nuevo metodo de destruir una combinación organica (1911) Sobre un aparato para demonstrar la absorción de los gases por el carbón u outra substancia absorbente a bajas temperaturas (1910) Metodo de dosificación de sulfatos y de toda substancia precipitable, por medio de las densidades, aplicable especialmente a las que son de dificil filtración (1910) Magnin-Pellerano method for alkaloid sublimation Magnin-Zappi method for isolating alkaloids (1925) A device for vacuum sublimation With Hector Bolognini. Flow meter for petroleum, oils or other liquids of varying viscosity
John Muir
John Muir, Scottish-born South African physician and naturalist (Castle Douglas, Dunfries & Galloway 18 June 1874 – Riversdale, Cape Province 03 August 1947) Performed plant collections Described plant species Aristea ensifolia 1992 (Iridaceae) HONORS Muiria N.E. Brown 1927 (Aizoaceae)
John Martin
John Brand Martin, South African civil engineer (Durban 20 April 1937 – Cape Town 07 October 1999) With P. Symonds his works on mode approximation techniques are today regarded as milestones in the history of plasticity theory Discovered simple theorems for obtaining upper bounds on the displacements in an impulsively loaded structure, and lower bounds on the duration of the response OTHER CONTRIBUTIONS /BIBLIOGRAPHY With S. Caddemi. Convergence of the Newton-Raphson algorithm in elastic-plastic incremental analysis. Int. J. Numer. Meth. Eng. 31: 177-91, 1991 With A. Nappi. An internal variable formulation for perfectly plastic and linear hardening relations in plasticity. Europ. J. Mechanics A 9(2):107-31, 1990 With C.T. Dittmer & T.B. Griffin. A programming approach to the numerical analysis of elastoplastic continua. Eng. Fract. Mech. 21:817-25, 1985 With L. Resende. Formulation of Drucker-Prager cap model. ASCE J. Eng. Mech. 111(7):855-81, 1985 An inverse variable approach to the formulation of finite element problems in plasticity (1981) Plasticity: Fundamentals and General Results (1975) Extremum principles for a class of dynamic rigid-plastic problems. Intern. J. Solids Struct. 8:185-04, 1972 The optimal design of beams and frames with compliance constraints. Intern. J. Solids Struct. 7:63-81, 1971 With L.S.S. Lee. Approximate solutions of impulsively loaded structures of a rate sensitive material. J. Appl. Math. Phys. 21:1011-32, 1970 With F.A. Leckie. Deformation bounds in bodies in a state of creep. J. Appl. Mech. 34(2), 1967 Extended displacement bound theorems for work-hardening continua subject to dynamic loading. Intern. J. Solids Struct. 2:9-26, 1966 With P.S. Symonds. Mode approximation for impulsively loaded rigid-plastic structures (1966) Impulsive loading theorems for rigid-plastic continua. ASCE J. Eng. Mech. Div. 90:27-42, 1964 A displacement bound technique for elastic continua subject to a certain classes of dynamic loading. J. Mech. Phys. Solids 12:165-75, 1964 With L. Resende. A progressive damage continuum model for granular materials. Comp. Meth. With M. Ortiz. Symmetry-preserving return mapping algorithms and incrementally extremal paths: an unification of concepts
Joaquim Pereira Machado Filho
Joaquim Pereira Machado Filho, Brazilian entomologist (Rio de Janeiro 06 September 1916 – ?) DESCRIBED Genera (Lepidoptera) with Rego Barros Bodosa 1969 Histioea 1972 Pseudohyaleucerea 1971 Species Agyrtidia olivensis 1970 with Rego Barros (Lepidoptera) Dicrana herberti 1957 (Dermaptera) Doru cincinnatoi 1967 (Dermaptera) Histioea paraensis 1972 with Rego Barros (Lepidoptera) Pseudohyaleucerea manicorensis 1971 with Rego Barros (Lepidoptera) Sparatta bocainensis 1953 (Dermaptera) Spongiphora moreirai 1947 with Lemos de Castro (Dermaptera) HONORS Machadoia Rego Barros 1956 (Lepidoptera)
Joaquim Correa de Mello
Joaquim Correa de Mello, Brazilian botanist (São Paulo 10 April 1816 – São Paulo 20 December 1877) DESCRIBED PLANTAE TAXA Genera Balfourodendron 1877 Pithecoxanium Species Hanburyophyton splendens 1868 Jacaranda lilacina Pithecoxanium bidentatum Pithecoxanium riparium Pithecoxanium trichiadenum Tynanthus micranthus Zeyheria hanburiana SOME BIBLIOGRAPHY Bignoniaceas paulistanas. Arq. Mus. Paran. 9:1-206, 1852 Observations on Alibertia with description of a new species of that genus. Trans. Linn. Soc. London 28(4):519-22, 1873 Notes on some Brazilian plants from the neighbourhood of Campinas. J. Linn. Soc. London 11:253-63, 1870 On Myrocarpus frondosus Allem. J. Linn. Soc. London 11(53):263-5, 1870 With R. Spruce. Notes on the Papayaceae. J. Linn. Soc. Botany 10:1-18, 1869 HONORS Foreign Member, Royal Society of Botany, Edinburgh (1869) Honorary Member, British Pharmaceutical Conference (1870) Silver Medal, Moscow Botanical Garden (1868) Vermeil Medal, Société Imperiale et Centrale d’Horticulture, France (1868) Genus Melloa Bureau 1868 (Bignoniaceae)
Jnanendra Nath Mukherjee
Jnanendra Nath Mukherjee, Indian chemist (Mahavdepur, Rajshahi District, today Bangladesh 23 April 1893 – 10 May 1983) Internationally respected as a colloid chemist Enunciated theory of the electro kinetic double layer and its ionic constitution (1919) Performed important studies on soil colloids recognized in Europe Developed and improved tools and techniques for studies of soil colloids With N.C. Sen Gupta developed a simple rotary viscometer for the study of anomalous viscous properties (1942) DEVELOPED METHODS Developed technique for conductometric and electrometric titration of acid-sols Boundary method for determination of the cataphoretic speed of colloidal particles Sources of error in the measurement of the electrical charge of colloidal particles by the method of moving boundaries: an improved method based on a direct measurement of the potential gradient across the boundary. Proc. Roy. Soc. 103:102, 1928 With N.C. Sen Gupta. The velocity gradient method for the measurement of viscous properties of non-netonian liquids. Ind. J. Physics 16:49-53, 1941 With N.C. Sen Gupta. Methods of measuring yield value, viscosity and thixotropy. Ind. J. Physics 16:54-65, 1941 With M.K. Indra. A method of differentiation of crude oils based on chromatography capillary analysis and fluorescence in UV light. Nature 154:734-5, 1944 Papers in Nature Theory of soil acidity. Nature 110:739, 1922 The interaction between silica and electrolytes in relation to theories of soil acidity. Nature 115:157-8, 1925 With S.P. Raychaudhury. Critical potential in coagulation of colloids by electrolytes. Nature 122:608, 1928 With S.P. Raychaudhuri. Hydrolytic absorption by activated charcoal. Nature 128:412, 1931 With N.C. Sengupta. Formation of aggregates and structures in dilute solutions of hydrogen bentonites. Nature 145:1971, 1940 With R.P. Mitra. Differentiation of hydrogen clays and identification of their mineral constituents by electrochemical and viscous methods. Nature 154:824, 1944 With S.K. Mukherjee. Effect of hydrogen ion concentration on cation exchange in clay salts. Nature 155(3924):49, 1945 With B. Chatterjee. Electrochemical properties of silicic acid soil. Nature 155:85, 1953 SOME BIBLIOGRAPHY The origin of the charge on a colloidal particle and its neutralization by electrolysis. Trans. Faraday Soc. 16:103-15, 1921 The adsorption of ions. Phil. Mag. 44:322, 1922 On the nature of the reactions responsible for soil acidity. Part I. On the titration curve of acid clay. Indian J. Agric. Sc. 1:189-203, 1931 Electrical properties of colloids. Part I. Explanation of activity and conductivity measurements in colloidal solutions. Kolloid Z. 62:257-68, 1933 With N.C. Sen Gupta. The viscous and electro-chemical properties of constituents of oil-well drilling muds. Sci. Cult. 6:368, 1940 With B. Chatterjee & P.C. Gaswanni. Limiting exchange of aluminum ions from hydrogen clays on the addition of neutral salts. J. Ind. Chem. Soc. 19:40-407, 1942 With R.P. Mitra. Electrochemical properties of clay minerals. Jour. Phys. Chem. 47:543-9, 1943 With N.C. Sen Gupta & M.K. Indra. Effect of concentration and pH on the viscous and electrochemical properties of hydrogen bentonites. J. Phys. Chem. 47(8):553-77, 1943 With R.P. Mitra. Some aspects of the electrochemistry of clays. J. Colloid Sci. 1(2):141-59, 1946 With B. Chatterjee & B.M. Banerjee. Liberation of hydrogen aluminum and ferric ions from hydrogen clays by neutral salts. Jour. Colloid Sci. 2:247-56, 1947 With B. Chatterjee & A. Ray. Liberation of H+, Al++ and Fe+++ from pure clay minerals repeated salt treatment and desaturation. J. Colloid Sci. 3:437-47, 1948 Trace element deficiency in citrus. Sci. Cult. 15:235-7, 1949 With R.P. Mitra & N.S. Bagchi. The electrochemical properties of H-clays in relation to their mineralogical composition. Indian Soc. Soil Set. Bull. 6:1, 1951