Sifonapterofauna De Tres Especies De Roedores De Concepcion, Viii Region-Chile

Alarcón, Mauricio E.

doi:10.4067/s0717-65382003000100003

Cited by 9 publications

(11 citation statements)

References 7 publications

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“…These results agree with the expected basicity trend for these catalysts, namely that CaO is more basic than, MgO, 10 but they do not correlate with their tested catalytic activity. 11 Both MgO and the mixture show similar basicity but different catalytic activities; thus, basicity plays a role but it is not unique with regard to the activity of the assayed catalysts.…”

Section: Analysis By Drifts Basicity Determinationmentioning

confidence: 99%

Catalytic cooperation at the interface of physical mixtures of CaO and MgO catalysts during steam gasification of naphthalene

Alarcón

Garcı́a

Centeno

et al. 2001

Surface & Interface Analysis

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Oxides CaO, MgO and a physical mixture of 10% CaO + 90% MgO were used as catalysts for the steam gasification of naphthalene. A synergistic effect in the conversion was observed with the mixture. Catalysts were characterized by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and XPS techniques. Basicity was significant for CaO as compared to MgO and the mixture, but did not correlate with catalytic activity. Bidentate carbonate-type formation, which remained even in the presence of steam at high temperature (1033 K), was observed on CaO. Carbonates on MgO and on the mixture are unidentate and disappeared when steam was present. Formates, carboxylic and aldehydic groups also were formed, at 723 K on MgO and at 423 K on the mixture and on CaO. These species disappeared at 873 and 1033 K for the mixture and CaO, respectively, thus indicating their greater stability on CaO than on the mixture and on the MgO. Deposition of carbonaceous matter on solids was observed. The order of the deposited content is mixture < MgO < CaO. No indication of mutual contamination by the metal composing the oxides was observed. A higher carbonate removal and less carbonaceous matter deposition were observed in CaO when in the mixture, as compared with CaO alone, suggesting a beneficial effect of MgO in the mixture. The synergistic effect observed using the 10% CaO + 90% MgO mixture was related to the inhibition of carbonaceous matter and carbonate formation on the catalysts. This inhibition is due to a catalytic cooperation between both oxides, as two separate phases. The presence of MgO is assumed to avoid the formation of stable bidentate carbonates on CaO, promoting instead unidentate species formation; this facilitates the gasification of naphthalene by steam.

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Section: Analysis By Drifts Basicity Determinationmentioning

confidence: 99%

Catalytic cooperation at the interface of physical mixtures of CaO and MgO catalysts during steam gasification of naphthalene

Alarcón

Garcı́a

Centeno

et al. 2001

Surface & Interface Analysis

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“…Although several prior studies have been conducted on the siphonapterofauna of mammals in the Neotropical region, there is still a lack of information on fleas and their diversity in this area (Jordan, 1939(Jordan, , 1942Autino and Lareschi, 1998;Linardi and Guimarães, 2000;Beaucournu and Castro, 2003;Alarcón, 2003;Lareschi et al, 2006). In this study, we present several first records for fleas from Bolivian Ctenomys.…”

Section: Discussionmentioning

confidence: 89%

Bolivian Ectoparasites: A Survey of the Fleas ofCtenomys(Rodentia: Ctenomyidae)

Pucu¹,

Lareschi²,

Gardner³

2014

Comparative Parasitology

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“…Those from individuals obtained in Argentina include 1 specific sucking louse, Hoplopleura auliscomydis (Anoplura: Hoplopleuridae; described from specimens collected in Collon Cura, Neuquén- Castro et al 2001), and several fleas (Siphonaptera), Craneopsylla minerva wolffhuegeli (Stephanocircidae; on specimens from Estancia La Ensenada, Santa Cruz-Sá nchez 2007), Ctenoparia topali (Hystrichopsyllidae; on specimens from Lago Ñ orquinco, Neuquén), Agastopsylla boxi gibbossa (Ctenophthalmidae; type host: L. micropus, type locality: Cerro Chapelco, Neuquén), and Tetrapsyllus (Tetrapsyllus) tantillus (Rhopalopsyllidae; on specimens from Arroyo Chapelco and Lago Ñ orquinco, Neuquén-Beaucournu and Alcover 1989). From Chilean specimens, numerous fleas have been reported (Alarcó n 2000(Alarcó n , 2003Gallardo 1991, 1992) including Ctenoparia intermedia, C. jordani, C. topali (Hystrichopsyllidae); Agastopsylla boxi boxi, Chiliopsylla allophyla allophyla (Ctenophthalmidae); Barreropsylla excelsa, Sphinctopsylla ares (Stephanocircidae); and Ectinorus (Ectinorus) ixanus, Ectinorus (Ichyonus) onychius onychius, Listronius ulus, Tetrapsyllus (Tetrapsyllus) rhombus, and Tetrapsyllus (T.) tantillus (Rhopalopsyllidae). Only 1 endoparasite, the nematode Stylestrongilus valdivianus (Trichostrongyloidea; Heligmonellidae), has been recovered from L. micropus; it infects the small intestine of Chilean specimens (DuretteDesset and Murú a 1979; see also Pérez-Ponce de Leó n et al 2000).…”

Section: Ecologymentioning

confidence: 98%