Octavio Drummond
Octavio de Almeida Drummond, Brazilian plant pathologist (Rio de Janeiro 21 June 1912 – 2001) ACHIEVEMENTS Described Ramularia phaseoli, causative agent of bean floury leaf spot (1945) Proposed a simple method for studying fungicides for preventive pulverization on leaves Um método simples e eficiente para o estudo de fungicidas para pulverizações preventivas em folhas. Lilloa 21:57-9, 1949 Demonstrated that the necrosis on tip of branches of coffee plants was caused by low temperatures Etiologia da “canela seca” do cafeeiro. Bol. Agric. Belo Horizonte 5(1-2):29-38, 1956 Described a new disease (maize ear rot by Sclerotium) With V.M. Yaringaño. Nota previa sobre uma nova podridão da espiga do milho produzida por Sclerotium. Congresso do Milho, Rio de Janeiro, 1962. A “folha de samambaia” do tomateiro. Ceres 3:385-90, 1942 (a virus disease of tomato)
Nil Ratan Dhar
Nil Ratan Dhar, Indian physical chemist (Jessore, Bangladesh 02 January 1892 – Allahabad, Uttar Pradesh State 05 December 1986) Authored over 450 original papers on electrochemistry, catalysis, velocity of reactions, colloid chemistry, photochemical processes and soil reactions ACHIEVEMENTS With D.N. Bhattacharya determined the mobility of ions at zero degree temperature and the transport number of nitrite ion by electrolysis of a solution of silver nitrate With A.K. Dutta determined the second dissociation constant of dibasic acids Concluded that tropical sunlight is one of the governing factors in various chemical processes that occur in soils such as nitrification Discovered the influence of light on nitrogen fixation and loss in soils Discovered the relationship between the nitrogen and phosphate status of soils Established that sunlight and phosphates enhance nitrogen fixation in soils by slow oxidation of organic matter A new method of nitrogen fixation and conservation and reclamation of alkali lands. Proc. Indian Acad. Sci. (1935) Suggested that many compounds that are formed in the atmosphere result from light-induced reactions (1930s)
Nguyen Van Dao
Nguyen Van Dao, Vietnamese mathematician and physicist (Thanh-Ba District, Phu Tho Province 1937 – Hanoi 2006) Authored 114 papers, 8 books and 5 monographs One of the world’s leading experts in nonlinear oscillations Studied the effects caused by parametric excitations on nonlinear systems Identified relationship between distinct components of nonlinear systems Made considerable contributions to methods of asymptotic analysis of nonlinear oscillatory systems, examining the interaction between nonlinear systems accomplishing self-excited oscillations, forced oscillation and parametrically-excited oscillations SOME BIBLIOGRAPHY Vibration and stability of dynamic systems with absorbers. Thesis (1965) Connected oscillations of rigid bodies. J. Math. Phys. (1966) Nonlinear oscillations of higher order systems (1979) With Yu. A. Mitropolsky. Applied asymptotic methods in nonlinear oscillations (1994) Quasilinear oscillations in systems with large static deflections. Proc. Intern. Conf. Appl. Dynamics (1995) With N. V. Dinh. Interaction between nonlinear oscillating systems (1996) With M.V. Dinh & T.K. Chi. Interaction between nonlinear parametric and forced oscillations. Viet. J. Mechanics 22(3), 1998 With N.V. Dinh. Dynamic absorber for self-excited system Some problems on nonlinear oscillations. IUTAM Solid Mech. Appl. 77:141-51, 2000 HONOURS Elected Member, European Science Academy (2002) LINKS https://vjs.ac.vn/index.php/vjmech/article/download/5526/5062
Miriam Phoebe De Vos
Miriam Phoebe De Vos, South African botanist (1912 – Stellenbosch 2005) DESCRIBED PLANT TAXA (Iridaceae) Genera Duthiastrum 1975 Subgenera Lomurea 1972 Rhipidopsis 1974 Sections Aggregatae 1972 Bicarinatae 1972 Glutinosae 1979 Linearifolium 1976 Pectinatae 1982 Pratenses 1972 Quadrangulifolium 1976 Saxatiles 1974 Stellanthe 1972 Subcallosae 1983 Teretifoliae 1982 Species About 30 Subspecies 4 Varieties 8 HONORS Devia Goldblatt & Manning 1990 (Iridaceae)
Maximo Drets
Maximo Eduardo Drets Nicolini, Uruguayan cytogeneticist (Montevideo 21 April 1930 – Montevideo 23 February 2017) Authored over 130 scientific publications Demonstrated the clastogenic action of some substances from animal origin With F.A. Saez. The action of gonyleptidine on the mitotic and meiotic chromosomes and on the interphase nucleus. Portugaliae Acta Biol. 5:287-302, 1958 With G.A. Folle & A. Aznarez. Clastogen action of a dimethyl p-benzoquinone of animal origin. Mutation Res. 102:159-72, 1982 Extreme chromosome shortening induced in human lymphocytes by 2, 3 dimethyl p-benzoquinone resembling fragmentation. Brief Comm. Environm. Mutag. 5(6):923-7, 1983 First to report a pericentric inversion of the X chromosome With J.H. Cardoso & A. Navarro. Sex chromosome inversion in a mosaic girl. Heredity 24(3):477-81, 1969 Presented the first case in the world of genetic malformation related chromosome 16 With J. H. Cardoso, A.H. Delfino & J. Carrau. Familial normal partial trisomy 16 with selective endoreduplication in malformation proband. Cytogenetics 9(5):333-50, 1970 Studied accurately the biggest family with Alport syndrome in medical literature With P. Purriel, E. Pascal, R. Sanchez Cestau et al. Familial hereditary nephropathy (Alport syndrome). Amer. J. Med. 49(6):753-73, 1970 Described the karyotype of capybara, the biggest rodent in the world With F.A. Saez & N. Brum-Zorrilla. Karyotype of the “carpincho” (Hydrochaeris hydrochaeris uruguayensis (Rodentia, Hydrochaeridae). Experientia 27(5):584-5, 1971 With F.A. Saez & N. Brum-Zorrilla described the karyotype of Southern long-nosed armadillo (Dasypus hybridus) in 1964 Discovered the first case of universal chromosome association With M. Soll. C-banding and non-homologous associations in Gryllus argentinus. Chromosoma 48:367-90, 1974 Observed for the first time different interchromatid distributions of high density chromatin in t-banded segments of human chromosomes and that these subtelomeric segments display standard features Discovered TSCE that are subtle exchanges of sister chromatids in subtelomeric t-region With G. Obe, F.J. Monteverde, G.A. Folle, I.I. Medina et al. Computerized graphic and light microscope analyses of t-banded chromosome segments of Chinese hamster ovary cells and human lymphocytes. Biol. Zentralbl. 111:204-14, 1992 Designed new techniques and devices for analysis of cells and chromosomes Image discriminator apparatus for cytophotometry. Mikroskopie 15:14-20, 1960 Ratio recorder for cytophotometry based on an image discriminator apparatus. Mikroskopie 16:341-8, 1962 Bandscan – A computer program for on-line linear scanning of human banded chromosomes. Comp. Progr. Biomed. 8:283-94, 1978 Described G-banding (Giemsa banding) independently from Lejeune & Dutrillaux With M.W. Shaw. Specific banding patterns of human chromosomes. Proc. Natl. Acad. Sci. USA 68(9):2073-7, 1971 First to design a quantitative plot for location of chromosome bands With H. Seuanez. Quantitation of heterogeneous human heterochromatin microdensimetric analysis of C and G-bands (1973) Developed the first method displaying three quantitative definitive parameters for each chromosome band With F.J. Monteverde. Automated cytogenetics with modern computerized scanning microscope photometer systems (1987) HONOURS Edward Larocque Tinker Award
Martín Doello Jurado
Martín Doello Jurado, Argentine malacologist and paleontologist (Gualeguaychú, Entre Ríos Province 04 July 1884 – Buenos Aires 09 October 1948) DESCRIBED MARINE & FOSSIL TAXA Genus Bouchardiella 1922 (Brachiopoda) Species Eulimella argentina 1938 Eupera platensis 1921 Mactra marplatensis 1949 Monocondylaea orbignyana 1917 Mytilus pseudochorus 1922 Pachycymbiola feruglioi 1931 Philine gouldi 1918 Semele casali 1949 Transenpitar americana 1951 HONORS Doellocosmia Bonarelli 1927 (Fossil Mollusca) Doellotatus Bordas 1932 & Doellomys Alvarez 1947 (Fossil Mammalia) Martindoelloia Orfila & Schajovsky 1963 (Lepidoptera)