18,288 research outputs found
Introducing Terminology-based Ontologies. Papers and Materials presented by the authors at the workshop "Introducing Terminology-based Ontologies" (Poli/Schmitz-Esser/Sigel) at the 9th International Conference of the International Society for Knowledge Organization (ISKO), Vienna, Austria, July 6th, 2006
No full textThis work-in-progress communication contains the papers and materials presented by Winfried Schmitz-Esser and Alexander Sigel in the joint workshop (with Roberto Poli) "Introducing Terminology-based Ontologies" at the 9th International Conference of the International Society for Knowledge Organization (ISKO), Vienna, Austria, July 6th, 2006
Neotypification and taxonomic status of Opephyllum martensii Schmitz in Schmitz et Hauptfleisch (Delesseriaceae, Rhodophyta) from Zamboanga, Southern Philippines
No full textThe monotypic delesseriaceous genus Opephyllum was created by Schmitz in Schmitz and Hauptfleisch for O. martensii, represented by a single collection from Zamboanga on the southwestern tip of Mindanao in the southern Philippines. As the type specimen or collection is no longer in existence, we are neotypifying the taxon based on recent topotype collections made in the spring of 1998. After comparison of this material with species of Martensia from the Indo-Pacific region and Caribbean Sea based on morphological evidence and sequence analysis of chloroplast-encoded rbcL and the nuclear-encoded large subunit ribosomal DNA gene (LSU rDNA), we conclude that Opephyllum is not generically distinct from Martensia despite its lack of the reticulate fenestrations that characterize fronds of every other species of the latter. We therefore propose the new combination Martensia martensii (Schmitz in Schmitz et Hauptfleisch) Lin, Fredericq et Liao for this rare member of the tribe Martensieae, subfamily Nitophylloideae.TR: CS0213352Source type: Electronic(1
Nanoanalysis of Co/Cu/NiFe thin films by tomographic atom probe
No full textSchleiwies J, Schmitz G, Heitmann S, Hütten A. Nanoanalysis of Co/Cu/NiFe thin films by tomographic atom probe. APPLIED PHYSICS LETTERS. 2001;78(22):3439-3441.Offering the possibility of improving data storage and magnetic sensoric, applications of giant magnetoresistance (GMR) in thin metallic films are of great interest. In order to study thermal reactions in such layered structures, atom probe tomography is used, which has been proven to perform a real three-dimensional analysis on the relevant length scale of several angstroms only. Co/Cu/Ni79Fe21 layered structures were deposited on tungsten substrate tips by ion beam sputtering and analyzed in the as-prepared state and after suitable heat treatments. After annealing at 250 degreesC for 30 min, Fe segregation at the Co/Cu interface inside the Co layer is clearly observed. This effect may be interpreted as an interface dusting potentially increasing the GMR. After annealing at 350 degreesC for 30 min, an additional Ni segregation inside Cu grain boundaries is observed. It is suggested that this segregation path forms the initial stage of pinhole formation and finally causes ferromagnetic bridges through the paramagnetic coupling layer. (C) 2001 American Institute of Physics
Chonocephalus transversalis Schmitz
No full textChonocephalus transversalis (Schmitz). (Figs 3132) Epichonocephalus transversalis Schmitz, 1928: 105. Chonocephalus transversalis (Schmitz). Comb. nov. This species is formally transferred to the genus Chonocephalus as a consequence of synonymising Epichonocephalus with this genus (see above). Material Holotype male (wing only), Bismarck Archipelago, Neupommern, Lewon, 3 9 November (MKB). 1 male, Papua New Guinea, Baiyer R., Goroka, 1200 m, 412 August 1985, T. Anderson (leg. R. S. George) (UMZC 3143).Published as part of Disney, R. Henry L., 2002, Revisionary notes on Chonocephalus Wandolleck (Diptera: Phoridae) with keys to species of the Holarctic Region, pp. 1-36 in Zootaxa 60 on page 32, DOI: 10.5281/zenodo.15598
Rhinoleucophenga joaquina Schmitz, Gottschalk & Valente
No full textRhinoleucophenga joaquina Schmitz, Gottschalk & Valente (Figures 8 a–c; 9 a–c) R. joaquina Schmitz et al., 2009: 786 –790 Type series. 2 ♀ labelled “ Rhinoleucophenga joaquina; Specimen 0 1 ♀; Brazil, Rio Grande do Sul, Bossoroca. 28 ° 45 ’01”S 54 ° 56 ’ 55 ”W, 12.x. 2013 col.: JL Poppe; banana bait”. Specimen 0 2 ♀; Brazil, Bahia, Estação Ecológica Raso da Catarina/ Município de Paulo Afonso. 9 ° 30 ' 39 "S 38 ° 32 ' 12 "W, 22.iv. 2012 col.: GF Oliveira; banana bait”. Holotype and paratypes are deposited in CEIOC /Fiocruz. Diagnosis. Head covered with ca. 55 (50–60) scattered interfrontal setulae, arista microtrichose, with ca. 10 very short dorsal branches and 6 ventral branches (Fig. 8 a). One strong pair of prescutellar acrostichal setae (Fig. 8 b). Legs yellow, wings hyaline (Fig. 8 c). The abdominal color pattern yellow, with black, medially interrupted marginal bands and a medial black stripe extending from the tip of the abdomen to tergite III or IV (Fig. 8 b). ♀. Head (Fig. 8 a). Frons yellowish covered with ca. 55 (50–60) scattered interfrontal setulae. Frontal length = 0.61mm (0.60–0.62); frontal index = 1.27 (1.24–1.30); top-to-bottom width ratio = 1.00 (0.92–1.08); ocellar triangle to frontal length ratio = 0.36 (0.33–0.38); or 1 /or 3 ratio = 1.53; or 2 /or 1 ratio = 0.35. Carina prominent, nose-like. Cheek index = 5.25 (4.24–6.26). Eye index = 1.30 (1.27–1.32). Antenna with flagellomeres of the same color as front, arista microtrichose with ca. 10 dorsal branches and 6 ventral branches plus terminal fork. Palpus yellowish with ca. 20 setae on lower part. Thorax (Fig. 8 b). Scutum homogeneously brownish or with three faint longitudinal stripes slightly darker. Thorax length 1.38mm (1.33–1.44). 14 rows of acrostichal setulae. 1 pair of prescutellar setae, about 57 % of posterior dorsocentral setae. Postpronotum with one setae. Transverse distance between dorsocentral setae 4.71 x (4.42 –5.00) the longitudinal distance. Basal scutellar setae divergent. Sterno index = 0.89; median katepisternal setae absent; pleura brownish. Halteres whitish yellow. Legs yellow. Wings (Fig. 8 c). Hyaline. Length 3.3mm (3.1–3.5); width 1.47mm (1.4–1.55). Indices: C = 3.25 (3–3.5); hb = 0.41 (0.40–0.43); Ac = 1.24 (1.11–1.36); 4 c = 1.00 (1.00–1.00); 4 v = 2.45 (2.23–2.66); 5 x = 1.57 (1.46–1.68); M = 0.81 (0.73–0.90); prox.x = 0.98 (0.96 –1.00). Abdomen (Fig. 8 b). Yellow, with black, medially interrupted marginal bands on tergites and a medial black stripe extending from the tip of the abdomen to tergite III or IV. Body length: 3.62mm (3.50–3.75). Terminalia ♀ (Fig. 9 a–c). Cerci long with many longer apical setae on each one. Epiproct short with few subequal setae. Hypoproct wider than long. Spermathecal capsule rounded, basal introvert reaching ca. ¾ of inner capsule. Type locality. Brazil, Rio Grande do Sul, Bossoroca (28 ° 45 ’01”S 54 ° 56 ’ 55 ”W). Distribution. Males known previously only from the type-locality (Joaquina, Florianópolis, Santa Catarina, Brazil). Now the distribution is extended southwards to Pampa (Bossoroca, Rio Grande do Sul) and northwards to Caatinga (Raso da Catarina, Paulo Afonso, Bahia). Biology. Previously this species has been found breeding in Dyckia encholirioides (Bromeliaceae) flowers in coastal dunes (Schmitz et al. 2009). Collected in fermented-banana traps, along the edges of forest patches in pampas, and in the Caatinga sensu strictu.Published as part of Poppe, Jean Lucas, Schmitz, Hermes José & Valente, Vera Lúcia Da Silva, 2015, The New World genus Rhinoleucophenga (Diptera: Drosophilidae): new species and notes on occurrence records, pp. 349-370 in Zootaxa 3955 (3) on pages 359-360, DOI: 10.11646/zootaxa.3955.3.4, http://zenodo.org/record/39994
Transitions in turbulent rotating Rayleigh-Bénard convection
No full textNumerical simulations of rotating Rayleigh-Benard convection are presented for both no slip and free slip boundaries. The goal is to find a criterion distinguishing convective flows dominated by the Coriolis force from those nearly unaffected by rotation. If one uses heat transport as an indicator of which regime the flow is in, one finds that the transition between the flow regimes always occurs at the same value of a certain combination of Reynolds, Prandtl and Ekman numbers for both boundary conditions. If on the other hand one uses the helicity of the velocity field to identify flows nearly independent of rotation, one finds the transition at a different location in parameter space.Deutsche Forschungsgemeinschaft (DFG
Chonocephalus elongatus Schmitz
No full textChonocephalus elongatus Schmitz Chonocephalus elongatus Schmitz, 1950: 21. Two females on separate slides (in the MKB) are both labelled ‘Holotype’! I have therefore labelled one as a paratype. Material Holotype female, paratype female, New Guinea, Tinschhafen, under bark near termite nest, 16 May 1944, F. S. Ross (MKB 27134). Natural history The type series was from a nest of a termite.Published as part of Disney, R. Henry L., 2002, Revisionary notes on Chonocephalus Wandolleck (Diptera: Phoridae) with keys to species of the Holarctic Region, pp. 1-36 in Zootaxa 60 on page 19, DOI: 10.5281/zenodo.15598
Analysis of fumarate nitrate reductase regulator as an oxygen sensor in Escherichia coli
No full textAnalysis of fumarate nitrate reductase regulator as an oxygen sensor in Escherichia coli
No full textSweetener-Ethanol Complex in Brazil, the United States, and Mexico: Do Corn and Sugar Prices Matter?
No full textSugar is a major commodity, produced and traded around the world, but it is no longer the only sweetener. For example, in the United States, roughly 50 percent of the sweetener market is made up of high fructose corn syrup (HFCS), which is also making inroads into Mexico. This is not the case, however, for the European Union and countries such as Brazil, which dominates the world sugar market in almost all aspects (Schmitz, 2002). In the United States, 8 to 10 percent of the U.S. corn crop goes into HFCS production, with roughly the same percentage of corn being used for the production of ethanol (Schmitz and Polopolous, 1999). In Brazil, however, sugarcane, rather than corn, is used in the production of ethanol. Because of relative price differences for corn and sugar, along with government subsidies, countries like Brazil will remain heavily dependent on sugar for both its sweetener needs and ethanol production.International Relations/Trade, Resource /Energy Economics and Policy,
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