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Search Results: 1 - 10 of 217360 matches for " Diana Pérez "
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Why should our mind-reading abilities be involved in the explanation of phenomenal consciousness?
Pérez,Diana I.;
An??lisis filos?3fico , 2008,
Abstract: in this paper i consider recent discussions within the representationalist theories of phenomenal consciousness, in particular, the discussions between first order representationalism (for) and higher order representationalism (hor). i aim to show that either there is only a terminological dispute between them or, if the discussion is not simply terminological, then hor is based on a misunderstanding of the phenomena that a theory of phenomenal consciousness should explain. first, i argue that we can defend first order representationalism from carruthers' attacks and ignore higher order thoughts in our account of phenomenal consciousness. then i offer a diagnostic of carruthers' misunderstanding. in the last section i consider further reasons to include mindreading abilities in an explanation of phenomenal consciousness.
Is Thought without Language Possible?
Diana I. Pérez
Principia : an International Journal of Epistemology , 2005,
Abstract: In this paper,1 I discuss Davidson’s ideas about the relationship between mind and language. First, I consider his arguments for the claim that there cannot be thought without language, and I examine the assump-tions the arguments presuppose. In the second place, I consider the idea of “thought” Davidson adopts, and its essentially normative and holistic character. Third, I try to show the adequacy of this conception of thought in order to deal with epistemological problems, and the inade-quacy of this notion in solving the problem of the “emergence” of thought. Finally, I sketch an alternative account of such an “emer-gence,” looking for continuities between pre-linguistic and linguistic thoughts.
Fluctuación y distribución espacio-temporal de Tuthillia cognata (Hemiptera, Psyllidae) y de Ocyptamus persimilis (Diptera, Syrphidae) en el cultivo de camu-camu Myrciaria dubia (Myrtaceae) en Ucayali, Perú
Pérez, Diana;Iannacone, José;
Revista Brasileira de Entomologia , 2009, DOI: 10.1590/S0085-56262009000400014
Abstract: tuthillia cognata hodkinson, brown & burckhardt, 1986 (hemiptera, psyllidae), is a main pest on camu-camu culture myrciaria dubia h.b.k. mc vaugh (myrtaceae) in the peruvian amazon. the aim of the current research was to evaluate the fluctuation and spatial and temporal distribution of t. cognata and biological control by ocyptamus persimilis (curran, 1930) (diptera, syrphidae), from january to november 2004 at san juan and padre bernardo villages, pucallpa, ucayali, peru. the number of nymphs and adults of t. cognata were found higher during the wet than in the dry season, but not the number of eggs neither of colonies. eggs, nymphs and adults preferred the upper third of plant in comparison to the middle and lower third in both places. the exception was the presence of eggs at san juan, without a distinct preference by any part. no differences were observed in the percentage of infestation by t. cognata between both places and between dry and wet seasons. for o. persimilis there were no differences in number of eggs, larvae and pupae between dry and wet seasons. eggs, larvae and pupae preferred the upper third of the plants in comparison to the other parts in both places. both species, t. cognata and o. persimilis, presented an aggregate dispersion model. a direct relation between number of colonies of t. cognata and o. persimilis was found. however no correlation was found between number of eggs, nymphs, and adults of t. cognata and number of eggs, larvae, and pupae of o. persimilis.
Efecto insecticida de sacha yoco (Paullinia clavigera var. bullata Simpson) (Sapindaceae) y oreja de tigre (Tradescantia zebrina Hort ex Bosse) (Commelinaceae)...
Diana Pérez,José Iannacone
Ecología Aplicada , 2004,
Abstract: La resistencia de los mosquitos vectores de enfermedades metaxénicas a los insecticidas químicos, se ha incrementado en los últimos a os. Frente a esta realidad, se está realizando la búsqueda de métodos alternativos, utilizando extractos de plantas con actividad larvicida. El objetivo del presente trabajo fue evaluar la mortalidad larvaria del III estadio de Anopheles benarrochi Gabaldon, Cova García & Lopez, 1941 bajo la decocción de Paullinia clavigera var. bullata Simpson (Sapindaceae) y de la infusión de Tradescantia zebrina Hort ex Bosse (Commelinaceae). Los mayores porcentajes de mortalidad, fueron de 100 % a 24 h de exposición a las concentraciones de 10 y 20 % en P. clavigera y de 10 % en T. zebrina. P. clavigera mostró más eficiencia insecticida sobre A. benarrochi en comparación con T. zebrina en términos de CL50 de 1 a 12 h de exposición; sin embargo, a las 24 h los valores de CL50 fueron similares (P. clavigera, CL50 = 0.81 % y T. zebrina CL50 = 0.86 %).
TOXICIDAD DE PAULLINIA CLAVIGERA SCHLTDL. (SAPINDACEAE) Y CHONDRODENDRON TOMENTOSUM RUIZ ET PAV. (MENISPERMACEAE) SOBRE EL PIOJO SALTADOR DEL CAMU CAMU TUTHILLIA COGNATA (HEMIPTERA: PSYLLIDAE)
Pérez,Diana; Iannacone,José; Tueros,Alfredo;
Gayana. Botánica , 2008, DOI: 10.4067/S0717-66432008000200004
Abstract: toxic effects of two hidro-alcoholical extracts belonging to two amazonian plants of ethnobotanical importance, soapberry paullinia clavigera schltdl. (sapindaceae) and curare chondrodendron tomentosum ruiz et pav. (menispermaceae), both in vegetative growing, on iii nymph instars of jumping lice of camu camu tuthillia cognata hodkinson, brown & burckhardt, 1986 (hemiptera: psyllidae) were determined. collection of nymphs of t. cognata was performed on plantations of san juan small town, yarinacocha district, ucayali, peru. bioassays were done employing a randomized completely block design (rcbd): 6x4. maceration of extracts were performed during seven days at a proportion 1:10 (w/v) with a posterior solvent evaporation in a rotavapor. toxic effect on t. cognata was evaluated at 1,4, 8,12 and 24 h. in soapberry lc50 24h was 2,530 mg extract l"1 and in curare lc50 24h was 4,090 mg extract l"1 on t. cognata. at a concentration of 10,000 mg extract l4,lt50 of soapberry and curare were 10.38 and 15.01 h, respectively. phytochemical analysis showed saponins, phenols, flavonoids, qui?ones and cumarins in soapberry extract, and alkaloids and saponins in curare extract. toxicity in lc50 terms depended of the extract type employed.
Toxicological effect from the stem cortex of the amazonic plant soapberry Paullinia clavigera (Sapindaceae) upon three arthropods
Pérez,Diana; lannacone,José; Pinedo,Harvey;
Ciencia e investigación agraria , 2010, DOI: 10.4067/S0718-16202010000300012
Abstract: toxicological efifects of four extracts proceeding from the stem cortex of the amazonic plant paullinia clavigera d.r. simpson (sapindaceae) by decoction, ethanolic, chlorophormic and hexanic on three arthropods: rhynchophoruspalmarían (linnaeus, 1758) (curculionidae), eupalamides cyparissias (fabricius, 1777) (castniidae) and artemia franciscana (kellog, 1906) (artemiidae) in ucayali, peru were studied. the four extracts at the highest concentration tested were: decoction at a proportion 1:10 (w/v), ethanolic, chlorophormic and hexanic at 100 mg·l-1. toxic effects were evaluated at 12,24,48 and 72 hours on larvae of iii in star of r. palmarum and larvae of ii instar of e. cyparissias; and at 24 and 48 hours on nauplii of a. franciscana. toxicity in terms of lc50 on the three arthropods evaluated depends of type of extract of soapberry employed. in r. palmarum, decoction (lc50-72h = 59.15%) presented a high toxicity, although a significant effect of hydroalcoholic extract was observed at 40 mg·l-1 in comparison with control. the extracts of decoction (lc50-72h = 70.71 %) and ethanolic (lc50-72h = 66.21 mg·l-1) presented high toxicities one. cyparissias, and finally, hexanic extracts (lc50-48h = 18.79 mg·l-1), decoction (lc50-48h = 23.82 %) and chlorophormic (lc50-48h = 23.64 mg·l-1) presented the highest toxicities on a. franciscana. in the phytochemical analysis, saponins showed a very positive reaction in hydroalcoholic extract, and flavonoids and phenols had a very positive reaction in extract of decoction. the triterpenes were present only in the hexane extract. the hydroalcoholic and decoction extract showed toxicity on the two pest r. palmarum and e. cyparissias, but only the hydroalcoholic compared to the other three extracts had the lowest effect of risk and higher selectivity to the aquatic environment on a. franciscana.
Mortalidad y repelencia en Eupalamides cyparissias (Lepidoptera: Castniidae), plaga de la palma aceitera Elaeis guineensis, por efecto de diez extractos botánicos
Pérez,Diana D.; Iannacone O.,José;
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: the plants with insecticide activities constitute a main compound of integrated pest management. under this premise, the aim of the current research was to evaluate mortality and repellence of eupalamides cyparissias fab. (lepidoptera: castniidae) larvae, pest of oil palm elaeis guineensis jacquin, employing ten plants with insecticide potential: indian heliotrope (heliotropium indicum l., boraginaceae), angel′s trumpets (brugmansia x candida pers., solanaceae), wandering jew (tradescantia zebrina hort ex bosse, commelinaceae), nettles-purge (jathropa curcas l., euphorbiaceae), soapberry (paullinia clavigera schltdl., sapindaceae), red spurge (euphorbia cotinifolia l., euphorbiaceae), annato (bixa orellana l., bixaceae), golden shower (cassia fistula l., fabaceae), birthwort fruit (aristolochia pilosa kunth, aristolochiaceae) and pareira (chondrodendron tomentosum ruiz & pavon, menispermaceae). bioessays with e. cyparissias were performed at 1 h and 24 h under standardized laboratory conditions. at 24 h exposure, the highest percentage of mortality of e. cyparissias was observed with soapberry (63.3 %: bark and leaves in decoction), annato (63.3 %: liquefied seeds) and red spurge (48.3 %: liquefied leaves). in the case of repellence, the highest effects were found in annato (83.3 %), soapberry (75 %) and angels′ trumpets (66.7 %: liquefied leaves).
TOXICIDAD DE PAULLINIA CLAVIGERA SCHLTDL. (SAPINDACEAE) Y CHONDRODENDRON TOMENTOSUM RUIZ ET PAV. (MENISPERMACEAE) SOBRE EL PIOJO SALTADOR DEL CAMU CAMU TUTHILLIA COGNATA (HEMIPTERA: PSYLLIDAE) TOXICITY OF PAULLINIA CLAVIGERA SCHLTDL. (SAPINDACEAE) AND CHONDRODENDRON TOMENTOSUM RUIZ ET PAV. (MENISPERMACEAE) ON JUMPING LICE OF CAMU CAMU TUTHILLIA COGNATA (HEMIPTERA: PSYLLIDAE)
Diana Pérez,José Iannacone,Alfredo Tueros
Gayana. Botanica , 2008,
Abstract: Se determinó el efecto tóxico de dos extractos hidroalcohólicos procedentes de dos plantas amazónicas de importancia etnobotánica, Paullinia clavigera Schltdl. "sachayoco" (Sapindaceae) y Chondrodendron tomentosum Ruiz et Pav "curare" (Menispermaceae), ambas en desarrollo vegetativo, sobre ninfas del III estadio de Tuthillia cognata Hodkinson, Brown & Burckhardt, 1986 "piojo saltador del camu camu" (Hemiptera: Psyllidae). Las ninfas de T. cognata se colectaron en plantaciones del caserío San Juan en el distrito de Yarinacocha, Ucayali, Perú. Los bioensayos se realizaron empleando un Dise o de Bloque Completo al Azar (DBCA): 6x4. Los extractos se maceraron durante siete días a una proporción 1:10 (p/v) con posterior evaporación del solvente en rotavapor. El efecto tóxico se evaluó a 1, 4, 8, 12 y 24 h sobre T. cognata. En sachayoco se obtuvo una CL50_24h de 2.530 mg de extracto L"1 y en curare una CL50_24h de 4.090 mg de extracto L"1 sobre T. cognata. Auna concentración de 10.000 mg de extracto L"1, se determinó el TL50 del sachayoco y del curare a las 10,38 y 15,01 h, respectivamente. El análisis fitoquímico reveló saponinas, fenoles, flavonoides, quinonas y cumarinas en el extracto de sachayoco, así como alcaloides y saponinas en el extracto de curare. La toxicidad en términos de la CL50 dependió del tipo de extracto empleado. Toxic effects of two hidro-alcoholical extracts belonging to two Amazonian plants of ethnobotanical importance, soapberry Paullinia clavigera Schltdl. (Sapindaceae) and curare Chondrodendron tomentosum Ruiz et Pav. (Menispermaceae), both in vegetative growing, on III nymph instars of jumping lice of camu camu Tuthillia cognata Hodkinson, Brown & Burckhardt, 1986 (Hemiptera: Psyllidae) were determined. Collection of nymphs of T. cognata was performed on plantations of San Juan small town, Yarinacocha district, Ucayali, Peru. Bioassays were done employing a randomized completely block design (RCBD): 6x4. Maceration of extracts were performed during seven days at a proportion 1:10 (w/v) with a posterior solvent evaporation in a rotavapor. Toxic effect on T. cognata was evaluated at 1,4, 8,12 and 24 h. In soapberry LC50 24h was 2,530 mg extract L"1 and in curare LC50 24h was 4,090 mg extract L"1 on T. cognata. At a concentration of 10,000 mg extract L4,LT50 of soapberry and curare were 10.38 and 15.01 h, respectively. Phytochemical analysis showed saponins, phenols, flavonoids, qui ones and cumarins in soapberry extract, and alkaloids and saponins in curare extract. Toxicity in LC50 terms depended of the extract type employed.
Mortalidad y repelencia en Eupalamides cyparissias (Lepidoptera: Castniidae), plaga de la palma aceitera Elaeis guineensis, por efecto de diez extractos botánicos Mortality and repellence of Eupalamides cyparissias (Lepidoptera: Castniidae), pest of oil palm Elaeis guineensis, by effect of ten botanical extracts
Diana D. Pérez,José Iannacone O.
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: Las plantas con actividad insecticida constituyen un importante componente del manejo integrado de plagas. Bajo esta premisa, el objetivo del presente estudio fue evaluar la mortalidad y repelencia larval de Eupalamides cyparissias Fab. (Lepidoptera: Castniidae), plaga de la palma aceitera Elaeis guineensis Jacquin; empleando diez plantas con potencial insecticida: Ucullucuysacha (Heliotropium indicum L., Boraginaceae), Floripondio (Brugmansia x candida Pers., Solanaceae), Oreja de Tigre (Tradescantia zebrina Hort ex Bosse, Commelinaceae), Pi ón Blanco (Jathropa curcas L., Euphorbiaceae), Sacha yoco (Paullinia clavigera Schltdl., Sapindaceae), Yuquilla (Euphorbia cotinifolia L., Euphorbiaceae), Achiote (Bixa orellana L., Bixaceae), Retama común (Cassia fistula L., Fabaceae), Huancahuisacha (Aristolochia pilosa Kunth, Aristolochiaceae) y Curare (Chondrodendron tomentosum Ruiz & Pavon, Menispermaceae). Los bioensayos con E. cyparissias abarcaron entre 1 h y 24 h, bajo condiciones estandardizadas de laboratorio. A 24 h de exposición, los mayores porcentajes de mortalidad de E. cyparissias se presentaron en los tratamientos con Sacha yoco (63,3 %: corteza y hojas en decocción), Achiote (63,3 %: semillas en licuado) y Yuquilla (48,3 %: hojas en licuado). En el caso de la repelencia, los mayores efectos se encontraron en los tratamientos con Achiote (83,30 %), Sacha yoco (75 %) y Floripondio (66,7 %: hojas en licuado). The plants with insecticide activities constitute a main compound of integrated pest management. Under this premise, the aim of the current research was to evaluate mortality and repellence of Eupalamides cyparissias Fab. (Lepidoptera: Castniidae) larvae, pest of oil palm Elaeis guineensis Jacquin, employing ten plants with insecticide potential: Indian heliotrope (Heliotropium indicum L., Boraginaceae), Angel′s trumpets (Brugmansia x candida Pers., Solanaceae), Wandering Jew (Tradescantia zebrina Hort ex Bosse, Commelinaceae), Nettles-purge (Jathropa curcas L., Euphorbiaceae), Soapberry (Paullinia clavigera Schltdl., Sapindaceae), Red spurge (Euphorbia cotinifolia L., Euphorbiaceae), Annato (Bixa orellana L., Bixaceae), Golden shower (Cassia fistula L., Fabaceae), Birthwort fruit (Aristolochia pilosa Kunth, Aristolochiaceae) and Pareira (Chondrodendron tomentosum Ruiz & Pavon, Menispermaceae). Bioessays with E. cyparissias were performed at 1 h and 24 h under standardized laboratory conditions. At 24 h exposure, the highest percentage of mortality of E. cyparissias was observed with Soapberry (63.3 %: bark and leaves in decoction), Annato (63.
3D Reconstruction with Spiral Computed Tomography in Choroidal Osteoma  [PDF]
Francisco Javier Ascaso, Laura Herrera, Laura Villén, Rafael Lasierra, Juan Iba?ez, Diana Pérez, José Angel Cristóbal
Open Journal of Ophthalmology (OJOph) , 2013, DOI: 10.4236/ojoph.2013.31002
Abstract:

Choroidal osteoma (CO) is a rare, ossifying benign tumor originated in the choroid that typically occurs in otherwise healthy young women (1,2). It is characterized by a yellowish, well demarcated lesion in the juxtapapillary or macular area. The diagnosis is clinical and can be confirmed with the use of fluorescein or indocyanine angiography, optical coherence tomography, computed tomography or magnetic resonance imaging. Choroidal neovascularization or subretinal fluid, the main causes for vision loss, can be treated with laser therapy, photodynamic therapy or intravitreal antivascular endothelial growth factor therapy. We present a case of choroidal osteoma, showing the role of the high resolution 3D spiral computed tomography.

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