José Zaclis
José Zaclis, Romanian-born Brazilian neuroradiologist (Telenesti, Moldavia 15 February 1917 – São Paulo 20 October 1983) Developed many surgical techniques Modification on the technique of peripheral neurectomy for treatment of trigeminal neuralgia. Arq. Neuropsiq. 7(1):29-30, 1949 As neurectomias periféricas no tratamento das neuralgias do trigêmeo. Arq. Neuropsiqu. 9:228-75, 1951 Authored the thesis Pan-angiografia cerebral por hipertensão pulmonary (1958) translated into many languages in which described the technique of cerebral pan-angiography by means of injection of contrast medium into a single artery while simultaneously producing transient intrathoracic hypertension A new method of cerebral angiography. Arch. Neuropsiqu. S. Paulo 17:1-22, 1959 Developed a modified Valsalva manoeuvre (1964) With R. Zaclis. A new method of surgical treatment for carotid-cavernous fistula (1973)
Jose Francisco Zikan
José Francisco Zikán, Czech-born Brazilian entomologist (Tepliz-Schoenau, Bohemia 19 March 1881 – São Paulo 23 May 1949) Authored 61 papers Elucidated the complete life cycle of a number of Brazilian species of insects DESCRIBED NEW TAXA Lepidoptera Genera Stichelia 1949 Neomelese 1968 Paramelese 1968 Species At least 95 Coleoptera O gênero Parandra Latr., 1804, com a descrição de 14 espécies novas (Col; Cerambycidae). Rev. Soc. Ent. Arg. 14:22-50, 1948 Hymenoptera Described 90 new species of genus Mischocyttarus, beyond other species in this group HONORS Zikania Borgmeier 1925 (Diptera) Zikaniola Carvalho 1946 (Hemiptera) Zikanita Lane 1943 (Coleoptera) Zikanapis Moure 1945 & Zikaniella Moure 1941 (Hymenoptera) Lepidozikania Travassos 1949 (Lepidoptera) Zikanella Hering 1932 (Lepidoptera) Zikanyrops Hopp 1928 (Lepidoptera) Subg. Zikandra Santos Silva 2003 (Coleoptera) His son, Walter Zikán, entomologist and politician (Mar de Espanha, Minas Gerais State 06 June 1910 – Itatiaia, Rio de Janeiro State 05 March 1989) Authored 12 entomological works With his father co-described at least 16 new species of butterflies HONORS Walterianella Bechyné 1955 (Coleoptera)
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)