213,130 research outputs found
Atividade antinociceptiva do sesquiterpeno drimanial isolado das cascas de Drimys Winteri (winteraceae): estudo do mecanismo de ação
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas. Programa de Pós-Graduação em Farmacologia.O sesquiterpeno drimanial isolado das cascas da planta brasileira Drimys winteri, apresentou importante atividade antinociceptiva, quando administrado por via sistêmica, intraplantar, espinhal e supraespinhal em diferentes modelos de nocicepção em camundongos. Além disso, o drimanial, apresentou marcante atividade anti-hiperalgésica quando avaliado na hiperalgesia induzida pelo glutamato. Os experimentos realizados com agonistas e antagonistas seletivos, e com o auxílio da técnica de união específica (binding) sugerem que a atividade antinociceptiva causada pelo drimanial esta relacionada com uma interação com o sistema glutamatérgico, mais especificamente, via interação com receptores glutamatérgicos metabotrópicos. Os resultados do presente estudo também indicam que os receptores vanilóides parecem contribuir para a atividade antinociceptiva do sesquiterpene drimanial. Além disso, os resultados do presente estudo indicam que o drimanial não apresentou atividade antinociceptiva quando avaliado em modelos de nocicepção t~ermica, como o teste da placa-quente ou da retirada de cauda (tail-flick). Por outro lado, sua atividade antinociceptiva não foi revertida pelo pré-tratamento dos animais com naloxona (antagonista opióide não-seletivo) ou com PCPA (inibidor da síntese de seotonina). Dessa forma, a atividade antinociceptiva do composto drimanial não parece depender de uma interação direta ou indireta com os sistemas opióide e serotoninérgico. Estes resultados não só confirmam, mas também estendem os resultados anteriores descritos em nosso laboratório, que demonstram que ambos os sesquiterpenos presentes nas cascas da D. winteri , o poligodial e o drimanial, contribuem de maneira importante para o uso desta planta na medicina popular
La teoria de l'error de traducció de proves: entrevista a Guillermo Solano-Flores
No full textGuillermo Solano-Flores és professor a l’Escola d’Educació
de la Universitat de Colorado Boulder, als EUA. El seu
treball de recerca examina la intersecció de la psicometria
i la sociolingüística i la manera com aquest coneixement
multidisciplinari pot contribuir a millorar el procés
de desenvolupament, revisió, traducció i adaptació de
proves. Va postular la Teoria de l’error de traducció de
proves, que està tenint un elevat impacte en la millora de
les proves internacionals per avaluar sistemes educatius
(TIMSS, PISA…). La recerca de Solano-Flores és rellevant
per a l’avaluació d’estudiants en societats amb alta
diversitat lingüística i també per a proves internacionals
Óxido nítrico e comportamento aversivo: estudo do substrato neural
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Farmacologia, Florianópolis, 2008As vias L-arginina/oxido nitrico (NO) estao amplamente distribuidas no sistema nervoso central (SNC) e envolvidas na modulacao da ansiedade. O labirinto em T elevado (LTE) e um teste animal validado farmacologicamente para o estudo da ansiedade experimental em ratos, onde o comportamento de esquiva inibitoria (Esq) e o de fuga representam o medo condicionado e inato, respectivamente. Oobjetivo deste estudo foi avaliar o efeito do tratamento com NÖ-nitro-L-arginina metil ester (L-NAME), um inibidor nao seletivo da enzima sintase do oxido nitrico neuronal (nNOS), nos comportamentos de Esq e fuga em ratos avaliados no LTE, apos sua micro-injecao em diferentes estruturas cerebrais relacionadas ao comportamento defensivo. Alem disso, investigamos se a via L-arginina/NO/cGMP do hipocampo ventral (HPCV) esta envolvida na modulacao da ansiedade em ratos avaliados no LTE, usando diferentes drogas com acao nesta via tais como L-NAME e 7-NI (inibidor preferencial da nNOS), azul de metileno, um inibidor nao seletivo da enzima guanilato ciclase soluvel, e SNP, um doador de oxido nitrico. O tratamento central com L-NAME (50-800 nmol) nao alterou os comportamentos de Esq e fuga. No entanto, a injecao de L-NAME (200 nmol) no ventriculo lateral (VL), amigdala basolateral (ABL), substancia cinzenta periaquedutal dorsolateral (SCPdl), nucleo do septo lateral (NSL), mas nao no nucleo do leito da estria terminal (NLET), prejudicou a Esq em comparacao ao grupo controle. No HPCV, L-NAME (200 nmol) e 7-NI (10-20 nmol) inibiram o comportamento de Esq. SNP 80 nmol aumentou a Esq sem modificar a fuga, e o pre-tratamento com azul de metileno (10 nmol) bloqueou os efeitos promovidos pelo SNP. Nossos resultados sugerem que o NO esta envolvido na modulacao do medo condicionado no LTE via ABL, SCPdl e NNSL, mas o NLET parece nao estar envolvido nestas respostas. Alem disso, o NO, via HPCV, parece estar envolvido na elaboracao de respostas aversivas compativel com a ideia de que a via NO/cGMP exerce uma funcao mportante em reacoes defensivas de ratos avaliados no teste do LTE
What we desire is african: intertextuality of negritude in Clarke's and Trindade's poetry
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-graduação em Letras/Inglês e Literatura CorrespondenteEste trabalho investiga a intertextualidade entre as poesias de Solano Trindade e George Elliot Clarke. O estudo analisa o uso de um eu-enunciador que descreve a luta dos poetas contra a invisibilidade do "eu" negro, a construção de um anti-épico que reconta a história do ponto de vista do negro, a reversão de valores que reafirma a tradição e a cultura negras, e a tentativa de construir uma nova ordem simbólica que se expressa pela ruptura de estereótipos nos textos dos dois autores. A pesquisa revê o discurso da negritude e sua presença na Poesia negra hoje
Contribution to imaging focusing techniques using synthetic aperture radars in millimeter and sub-millimeter bands
No full text[SPA] Esta tesis doctoral se presenta bajo la modalidad de compendio de publicaciones. Las frecuencias de ondas milimétricas (mmW) y terahercios ofrecen características únicas para obtener simultáneamente una buena resolución espacial y penetrabilidad. Los radares de onda continua de frecuencia modulada (FMCW) forman parte de los nuevos dispositivos de detección instalados en vehículos para explorar el entorno. La próxima generación de vehículos conectados y autónomos estará equipada con un elevado número de antenas que operan en una amplia gama de frecuencias para las comunicaciones y la detección del entorno ambiental. El estudio de las respuestas angulares espaciales en 3D y los patrones de radiación modificados por la estructura del vehículo permitirá una mejor integración de las antenas de comunicación y detección asociadas. El algoritmo de imagen multifrecuencia bifocalizada (MFBF) en la banda W utilizando el radar FMCW tiene una aplicabilidad directa en la mejora de la detección de armas ocultas, como sensores de proximidad para evitar colisiones y la localización de peatones en vehículos. Esta tesis doctoral evalúa la viabilidad de utilizar la señal de frecuencia intermedia (FI) proporcionada por un radar FMCW homodino que opera en 77 GHz como entrada al algoritmo monostático-bistático MFBF de mmW desde un punto de vista teórico y mediante simulación. Los resultados del algoritmo MFBF utilizando el radar FMCW se comparan con los obtenidos utilizando FSCW, equivalente al parámetro S21 obtenido a partir de un analizador vectorial de redes (VNA). Adicionalmente, también se ha investigado la capacidad de este sistema de radar utilizando el algoritmo de “imaging” MFBF para obtener imágenes desde un punto de vista analítico y experimental. Se realizaron dos conjuntos de mediciones, utilizando objetivos de referencia, en la banda W a 100 GHz y en la banda de terahercios a 300 GHz. Finalmente, esta tesis ha estudiado de forma teórica, mediante simulación electromagnética y experimental, el método de obtención de corrientes producidas por una antena que irradia sobre una plataforma vehicular utilizando imágenes diferenciales (“differential imaging”). La parte de simulación y experimental del estudio se centra en la medición de un objetivo a escala utilizando un sistema de imágenes que opera en una banda de terahercios -de 220 a 330 GHz- que coincide con una de las bandas de frecuencias de 5G. Se concluye que es viable la utilización de las señales FI proporcionadas por un radar FMCW homodino como entrada para el algoritmo monostático-biestático MFBF. Además, se ha demostrado la robustez del sistema “ultrawideband” (UWB) de ondas milimétricas y terahercios monostático de campo cercano en el dominio de la frecuencia, a 100 GHz y 300 GHz, utilizando el algoritmo de imaging. Finalmente, mediante el sistema UWB, se han demostrado las prestaciones del concepto de “differential imaging” para estimar las corrientes superficiales generadas por una antena sobre un vehículo.[ENG] This doctoral dissertation has been presented in the form of thesis by publication. Millimeter-wave (mmW) and terahertz frequencies offer unique characteristics for simultaneous good spatial resolution and penetrability. Frequency modulated continuous wave (FMCW) radars are part of the new sensing devices installed in vehicles to scan the environment. The next generation of connected and autonomous vehicles will be equipped with a high number of antennas operating over a wide range of frequencies for communications and sensing of the ambient environment. The study of 3D spatial angular responses and radiation patterns modified by the radiation structure and by the vehicle structure will enable better integration of the associated communication and sensing antennas. The W-band multi-frequency bifocused imaging (MFBF) algorithm using FMCW radar has direct applicability in improving concealed weapon detection, such as proximity sensors for collision avoidance and pedestrian detection in vehicles. This thesis evaluates the feasibility of using the intermediate frequency (IF) signal provided by a homodyne FMCW radar operating at 77 GHz as input to the mmW monostatic-bistatic MFBF algorithm from a theoretical and simulation point of view. The results of the MFBF algorithm using the FMCW radar are compared with those obtained using FSCW, equivalent to the S21 parameter obtained from a vector network analyzer (VNA). Additionally, the capability of this radar system using the MFBF imaging algorithm to obtain images from an analytical and experimental point of view has also been investigated. Two sets of measurements were performed, using reference targets, in the W-band at 100 GHz and in the terahertz band at 300 GHz. Finally, this thesis has studied theoretically, by means of electromagnetic simulation and experimental, the method of obtaining currents produced by an antenna radiating on a vehicular platform using differential imaging. The simulation and experimental part of the study focuses on the measurement of a scaled target using an imaging system operating in a terahertz band - from 220 to 330 GHz – which coincides with a 5G frequency band. It is concluded that it is feasible to use the IF signals provided by a homodyne FMCW radar as input to the monostatic-bistatic MFBF algorithm. Furthermore, the robustness of the near-field monostatic millimeter-wave and terahertz near-field ultrawideband (UWB) system in the frequency domain at 100 GHz and 300 GHz using the imaging algorithm was demonstrated. Finally, the concept of differential imaging using the UWB system has been demonstrated to estimate the surface currents generated by an antenna on a vehicle.Escuela Internacional de Doctorado de la Universidad Politécnica de CartagenaPrograma de Doctorado en Tecnologías de la Información y las ComunicacionesEsta tesis doctoral se presenta bajo la modalidad de compendio de publicaciones. Está formada por un total de cuatro artículos: 1.José Antonio Solano-Pérez, Jose-Maria Molina-Garcia-Pardo, José-Víctor Rodríguez, Lluís Jofre, Antonio Mateo-Aroca, Comparison of using mm-wave FMCW radar IF signals against frequency-domain VNAs in the application of the multifrequency bifocusing (MFBF) imaging algorithm, AEU – International Journal of Electronics and Communications, Volume 117, 2020, 153103, ISSN 1434-8411, https://doi.org/10.1016/j.aeue.2020.153103. 2. Solano-Perez, J.A.; Martínez-Inglés, M.-T.; Molina-Garcia-Pardo, J.-M.; Romeu, J.; Jofre, L.; Rodríguez, J.-V.; Mateo-Aroca, A. Linear and Circular UWB Millimeter-Wave and Terahertz Monostatic Near-Field Synthetic Aperture Imaging. Sensors 2020, 20, 1544. https://doi.org/10.3390/s20061544. 3. Solano-Perez, J.A.; Martínez-Inglés, M.-T.; Molina-Garcia-Pardo, J.-M.; Romeu, J.; Jofre-Roca, L.; Ballesteros-Sánchez, C.; Rodríguez, J.-V.; Mateo-Aroca, A. Terahertz Frequency-Scaled Differential Imaging for Sub-6 GHz Vehicular Antenna Signature Analysis. Sensors 2020, 20, 5636. https://doi.org/10.3390/s20195636. 4. Solano-Perez, J.A.; Martínez-Inglés, M.-T.; Molina-Garcia-Pardo, J.-M.; Romeu, J.; Jofre-Roca, L.; Ballesteros-Sánchez, C.; Rodríguez, J.-V.; Mateo-Aroca, A.; Guzmán-Quirós, R. On Differential Imaging Using Electromagnetic Simulation for Vehicular Antenna Signature Analysis. Sensors 2021, 21, 3796. https://doi.org/10.3390/s21113796.Universidad Politécnica de Cartagen
Calixto et al. 2022 AJB
No full textThis Readme_file.txt file was generated on 2022-05-29 by Eduardo Calixto
GENERAL INFORMATION
1. Title of Dataset: Revisiting the ant-plant-pollinator interaction: new insight into the importance of mutualist partners identity for plant fitness
2. Author Information
Eduardo S Calixto1,5*; Danilo B Santos; Denise Lange2; Helena M Torezan-Silingardi3; Robert J Marquis4; Kleber Del-Claro1,3
1 Programa de Pos-Graduacao em Entomologia. Faculdade de Filosofia, Ciências e Letras. Universidade de São Paulo. Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil. ESC – [email protected], DBS – [email protected]
2 Universidade Tecnológica Federal do Paraná, Campus Santa Helena, Rua Cerejeira, s/n, 85892-000, Santa Helena, PR, Brazil. DL – [email protected]
3 Laboratório de Ecologia Comportamental e de Interações. Instituto de Biologia. Universidade Federal de Uberlândia, Cx.P. 593, 38400-920, Uberlândia, MG, Brazil. HMTS – [email protected], KDC – [email protected]
4 Department of Biology and the Whitney R. Harris World Ecology Center, University of Missouri-St. Louis, 1 University Boulevard, St. Louis, Missouri 63121-4499, USA. RJM – [email protected]
Corresponding author. Eduardo S. Calixto. ORCID: 0000-0003-3617-2464. E-mail: [email protected]
DATA & FILE OVERVIEW
1. File List:
1.1 data_raw: contains all the data collected. Each sheet within this excel file is related to a prediction. When runing the R code, it will automatically
load the correct data_sheet.
1.2 R_scripts: Each R code is related to a prediction to be tested. Check methods and data collection in Dryad website to reference each code to each prediction
METHODOLOGICAL INFORMATION
1. All methodological approach has been uploaded in the Dryad webpage, in which readers can check how we collected and analysed our data. </p
State of California, [Civilian Exclusion Order No. 23], Solano County
No full textBroadside instructs Japanese American residents in Solano County, state of California, that they will not be permitted to travel, take up, or change residence prior to April 30, 1942 and to prepare for evacuation by that date to a Civil Control Office in the area. Residents failing to comply with the Civil Exclusion Order would be subject to criminal penalties and immediately apprehended and interned. Also instructs "responsible family members" to report to the Civil Control Office on April 27 or 28 for further instruction.The War Relocation Authority (WRA), together with the Wartime Civil Control Administration (WCCA), the Civil Affairs Division (CAD) and the Office of the Commanding General (OFG) of the Western Defense Command (WDC) operated together to segregate and house some 110,000 men women and children from 1942 to 1945. The collection contains documents and photographs relating to the establishment and administrative workings of the (WDC), the (WRA) and the (WCCA) for the year 1942
Yucca muscipula M. Ayala-Hern., Rios-Gomez, E. Solano & A. Garcia-Mend. 2022, sp. nov.
No full textYucca muscipula M. Ayala-Hern., Ríos-Gómez, E. Solano & A. García-Mend., sp. nov. (Figs. 1, 2). Yucca muscipula is morphologically similar to Yucca mixtecana and to a few branched individuals of Y. filifera, from which it differs in the unbranched stem, and longer leaves that are persistent on the distal portion of the stem after the first flowering. Its tepals are 4–5 cm long, with the outer ones being 1.0– 1.5 cm wide and the inner ones being 1.4–2.0 cm wide. Its filaments are 1.8–2.8 cm long and papillose, while its ovary is 1.8–2.3 cm long and 3.3–6.3 mm in diameter; the fruit and seeds seeds are larger than those of Y. filifera. Type:— MEXICO. Hidalgo: Municipality Metztitlán, highway San Juan Metztitlán-Zoquizoquipan, aproximately 2.6 km northeast from San Juan Metztitlán, xeric scrubland, 1320 m, 26 Jun 2021 (fl), R. Ríos-Gómez et al. 2046 ( Holotype: MEXU!; Isotypes: CIIDIR!, DES!, FEZA!, UAMIZ!). Plants arborescent, iteroparous, 2–4 m tall, rarely surculose. Stem simple, cylindrical, dry leaves persistent in the distal portion of individuals after the first flowering. Rosette leaves at the apex of the stems, linear, 63.5–82.6 cm long, 1.6–2.5 cm wide in the middle portion, ascending to appressed, coriaceous, glaucous, papillate on both surfaces, margin entire, filiferous, the filaments recurved, gray; terminal spine 0.6–1.0 cm long, brown, ribbed, conical, base bicolored, basally white, distal portion reddish-brown. Inflorescence paniculate, pendulous, 80–110 cm long, rachis white-greenish, once branched, branches 10–17 cm long, glabrous; bracts lanceolate, 7–14 cm long, 1–2 cm wide in the middle, yellowish-white, papyraceous, base reddish-brown, truncated, margin entire, apex acuminate. Flowers campanulate, whitish, greenish-white or yellowish-white, pedicels 1.0– 1.8 cm long, ascending, rarely arched, terete, glabrous; external tepals 3.9–5.0 cm long, 1.0– 1.5 cm wide, ovate-elliptical, base attenuate, margin entire, apex acute, the internal ones similar to the external ones but wider, 1.4–2 cm wide; filaments flattened, the apical portion thickened, diffuse, papillose; anthers yellow, 1.5–2.3 mm long, sagittate, extrose; ovary 1.8–2.5 cm long, 3.3–6.3 mm diameter, cylindrical, with slightly sunken carpels, septa prominent, green, style short; stigma 3-lobed, lobes 3.5–5.0 mm long, retuse, white, with scattered papillae. Fruits baccate, 8.0– 11.7 cm long, 2.5–3.2 cm diameter, cylindrical, pendulous, arched above the middle, crowned by the remains of the dried perianth, fleshy, indehiscent. Seeds 0.8–1.0 cm long, prismatic, slightly rough, black, dull; endosperm ruminated. Geographical distribution and habitat:—Endemic to the municipality of Metztitlán, Hidalgo, Mexico; in xeric scrublands and thorny forests with Acacia farnesiana (L.) Willdenow (1806: 1083), Agave striata Zuccarini (1833: 678), A. xylonacantha Salm-Reifferscheid-Dyck (1859: 92), Bursera Jacquin ex Linnaeus (1762: 471), Cephalocereus senilis (Haw.) Pfeiffer (1838: 142), Cnidoscolus multilobus (Pax) Johnston (1923: 86), Fouquieria splendens Engelmann (1848: 98), Jatropha dioica Sessé (1794: 4), Mimosa Linnaeus (1753: 516), Myrtillocactus geometrizans Console (1897: 10), Prosopis laevigata (Humb. & Bonpl. ex Willd.) Johnston (1962: 78) and Yucca filifera Chabaud (1876: 432); on lithic leptosols and regosols at elevation 1294–1350 m (Fig. 3). Phenology: — Yucca muscipula flowers from April to July and fruits from June to August. Additional specimens examined (paratypes): — MEXICO. Hidalgo: Metztitlán Municipality, La Paila de Anáhuac, 1322 m, 17 April 2021, R . Ríos-Gómez et al. 2038 (FEZA); San Juan Metztitlán, 1294 m, 26 June 2021, R . Ríos-Gómez et al. 2047 (FEZA); Banks of the Pía Sapa stream, 3 km from San Juan Metztitlán, 1350 m, 6 July 2021, R . Ríos-Gómez 2048 et al. (FEZA). Etymology: —The epithet is derived from the common name by which this plant is known in the type locality, “mousetrap palm” (mousetrap = muscipula). Uses: —The whole plant is used to establish living fences and the flowers are edible. Conservation status: — Yucca muscipula is Critically Endangered according to IUCN criterion B1, since it covers an extent of occurrence (EOO) of <100 km 2 and Endangered based on criterion B2, because the area of occupancy (AOO) covers <500 km 2. This species is restricted to four locations in the Barranca de Metztitlán Biosphere Reserve and its populations occupy 1.7% of its surface, which is 96,042 ha. In addition, it forms localized populations with few individuals in habitats close to rural human settlements and roads.Published as part of Ayala-Hernández, María M., Ríos-Gómez, Ramiro, Solano, Eloy & Mendoza, Abisaí García-, 2022, Yucca muscipula (Asparagaceae, Agavoideae), a new species from central Mexico, pp. 103-112 in Phytotaxa 543 (2) on pages 104-108, DOI: 10.11646/phytotaxa.543.2.1, http://zenodo.org/record/645072
Spectrometer and scanner with optofluidic configuration
No full textWe present a spectrometer and scanner based on optofluidic configurations. The main optical component of the spectrometer is a compound optical element consisting of an optofluidic lens and standard blazed diffraction grating. The spectrum size can be changed by filling the lens cavity with different liquids. The scanner comprises two hollow 45? angle prisms oriented at 90? to each other. By changing the liquid inside the prisms, two-dimensional light beam scanning can be performed. � 2013 Optical Society of America
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