Jose Castulo Zeledon
José Castulo de Jesús Zeledón Porras, Costa Rican ornithologist (Las Anonas, San Jose Province 24 March 1846 – Torino, Italy 16 July 1923) Relative of former presidents of Costa Rica Collected several thousand specimens, among which were a considerable number of new species (40 avian species and subspecies) First to obtain the breeding of resplendent quetzal in captivity Described the subspecies Aramides albiventris plumbeicollis 1888 SOME BIBLIOGRAPHY Catalogue of the Birds of Costa Rica. Proceed. U.S. Nat. Museum 8:104-118, 1885 Catalogo de las aves de Costa Rica. Anales Museo Nac. Costa Rica 1:103-35, 1887 HONORS Genus Zeledonia Ridgway 1889 (Aves) Corresponding Member, American Ornithologists Union (1884)
Hongzhao Zhang
Hongzhao Zhang or Hung Cao Chang, Chinese geologist and stratigrapher (Wu County, Zhejiang Province 11 March 1877 – Nanjing 06 September 1951) SOME BIBLIOGRAPHY Compilation of Chinese thermal springs (1956) Records of ancient mining sites (1954) The Triassic palaeogeography and stratigraphy of Yunnan (1947) With Y.C. Sun. New graptolite faunas from Lientan, Kwangtung. Contr. Geol. Inst. Nat. Univ. Peking 29:9-17, 1947 On some new occurrences of the marine Triassic of Kueichou. Bull. Geol. Soc. China 22(1-2), 1942 Fossil fishes of Choukoutien (1936) With P. Teilhard de Chardin, C.C. Young & W.C. Pei. On the Cenozoic formations of Kwangsi and Kwangtung. Bull. Geol. Soc. China 24:179-205, 1935 The Mesozoic orogenic mouvement South Eastern China. Geol. Surv. Kwangtung & Kwangsi Sci. Publ. 11 (1933) On the discovery of the graptolite-shale from Lientan, Yunnan District in Kwantung Province and its Stratigraphic Correlations. Bull. Geol. Soc. China (1933) A brief summary of the tertiary formations of inner Mongolia and their correlation with Europe and North America (1931) Permian plants from the La-Shih Pa and Tien-Lo Chung Coalfields, Northest of Chu-Chiang Kwantung. Palaeont. Mem. Geol. Surv. Kwantung & Kwangsi (1930) A preliminary report on the identification of some Lower Devonian brachiopods and pelecypods of Kwangsi Province. Geol. Surv. Kwangtung & Kwangsi Sci. Publ. 3 (1929) The Geology of Sa Shui, Szu Hui, Kuang Ning and Kao Yao Districts of West Kwangtung. Ann. Rep. Geol. Surv. Kwangtung & Kwangsi 2(2):109-117, 1928 Lapidarium sinicum: a study of minerals, rocks and fossils as shown in Chinese literature. Mem. Geol. Surv. China Series B 2:1-432, 1921 HONORS Genus Changisaurus Young 1959 (Fossil Reptilia) Hungchaoita Zhu, Xie, Liu & Qian 1964 (Mineral)
Hans Zocher
Ernst Werner Hans Zocher, German/Brazilian physical chemist (Bad Liebenstein, Thüringen 27 April 1893 – Rio de Janeiro 16 October 1969) ACHIEVEMENTS Authored over 80 works First to recognize a lyotropic nematic phase known as Zocher phase (1925) Observed that colloidal particles sometimes aggregate in bundles which named tactoids (1925) Presented equations for an orthotropic linear viscoelastic material With Oseen introduced the macroscopic thermodynamical description of the liquid crystals With Jacobsohn described a new type of sol called tactosol (1929) Discovered inorganic lyotropic liquid crystals (1920s) First to observe cholesteric-nematic phase transition effect (1929) With Clara Torok first introduced tactoid shape characterization Introduced term mesophase Introduced an apparatus for examining shape of particles in colloidal solutions With F. Stiebel introduced an ultramicroscopic technique for the study of monolayers by which they established the existence of inhomogeneities in extremely thin surface layers (1930) Described an electrode cleaning method (with Birstein) With P. Kubelka and C. Torok developed and patented a method for extraction of potassium salts from saltwater employing its precipitation as syngenite (1959) EPONYMY Zocher effect Zocher layers Zocher number Zocher rule “the linear dichroism of a colloidal dispersion reaches a maximum when its linear birefringence is zero” (1925) Zocher type particles Oseen-Zocher-Frank equations Oseen-Zocher-Frank elastic constants Oseen-Zocher-Frank free energy density Zocher ferric oxide iridescent films Zocher-Jacobsohn method (1928) Zocher method for preparing sols
Gregorio Zara
Gregorio Ynciong Zara, Philippine engineer and inventor (Lipa, Batangas 12 March 1902 – 15 October 1978) Discovered kinetic electrical resistance or Zara effect INVENTIONS (about 30 devices and equipments; incomplete) An earth magnetic and induction compass (1929) Two-way television telephone or videophone (1955) An airplane engine that employed industrial alcohol as fuel (1952) A semi-automatic propeller-cutting machine (1952) A sun stove A solar battery (1960s) Drinking glass vapor chamber to visualize radioactive elements (1962) Thermo solar energy machine (1961) A wooden microscope with a collapsible stage New designs for a house solar water heater (SolarSorber) A functional robot Wooden aircraft propellers (1963)
Gabriella Zuccari
Gabriella P. Zuccari, Italian / Brazilian zoologist (died São Paulo 1947) Authored Condições de divisão e regeneração em Naididae. Bol. Fac. Fil. Cien. Letr. Univ. São Paulo 12:5-41, 1947 Honored in genus Zuccaria Marcus 1948 (Turbellaria)
Flemming Zeemann
Flemming Axel Oscar Gordon Zeemann, Danish-born Brazilian chemical technologist (24 September 1899 – 03 October 1994) ACHIEVEMENTS Discovered a new mineral species (ibitiarite) that may be a variety of pyrocylite (1974-5) With Y.S. Visconti & B.N.F. Nicot. Study of a new raw material, montmorillionized feldspar from Barra do Piraí, and its ceramic use. Ceramica 6(24):23-4, 1960 Método de precisão para dosagem de titânio (1945) SOME BIBLIOGRAPHY Influência do grau de moagem das pastas de porcelana e grés no tempo e temperatura da queima (1967) With Y.S. Visconti, E. Goulart de Andrade & B.N.F. Nicot. Um estudo das caulinitas e haloisitas pela compactação artificial e considerações sobre a formação da haloisita. Cerâmica 11(42):18, 1965 Diagrams of ceramic compositions. Ceramica 2(8):164-7, 1956 Salagem de manilhas e outros produtos de grés. Rev. Quim. Ind. Bras. 24(273):15, 1955 With H. Freire de Carvalho. Formação de mulita em relação às moagens e temperaturas de queima. BRAZILIAN PATENTS With A.L. Montenegro, H. Harboe & Weskott Co. one patent (1932) With H. Harboe. Water-jacketed reinforced concrete tanks for mineral oils (nº 21.152) 1933 PI7908540-7 (1979)