196,372 research outputs found
ESTUDIO DE LA VELOCIDAD DEL SECADO DE RENOVALES DE CANELO DRIMYS WINTERI WOOD DRYING RATE STUDY OF CANELO DRIMYS WINTERI REGROWTH
No full textEn este trabajo se estudia experimentalmente la velocidad del secado artificial a temperaturas convencionales de renovales de canelo Drimys winteri. El diseño experimental incluye los programas de secado y el espesor de la madera. Seis ensayos son realizados usando madera de 25 y 50 mm de espesor, en un horno convectivo de 0.3 m³. La madera para los ensayos experimentales proviene de bosques de renovales creciendo en la zona de Lanco (X Región, Chile). Los resultados muestran que la velocidad del secado es limitada por la tendencia a los defectos del secado de los renovales de canelo. Las curvas de secado carecen de la etapa de velocidad de secado constante, la velocidad de secado máxima se encuentra en el rango de 1.72 x10-2 y 2.99x10-2 (%/h) y el contenido de humedad crítico varía entre 87 y 116 %This is an experimental study at conventional temperatures of the wood drying rate of canelo Drimys winteri regrowth. The experimental design include as a variables the drying schedule and the wood thickness. Six run are realized in 25 and 50 mm of wood thickness using a pilot drier with 0.3 m³ capacity. Canelo regrowth from Lanco (X Region, Chile) are utilized in this experiments. The results show that the wood drying rate is conditioned by the drying defects tendency of canelo regrowth. Also the drying curves are not constant drying rate and they have a maximal drying rate between 1.72 x10-2 and 2.99x10-2 (%/h) and the critical moisture content are among 87 and 116
ESTUDIO EXPERIMENTAL DEL SECADO DE RENOVALES DE CANELO DRIMYS WINTERI WOOD DRYING STUDY OF CANELO DRIMYS WINTERI RE-GROWTHS
No full textEn este trabajo se estudian programas de secado artificial a temperaturas convencionales para madera aserrada de renovales de canelo Drimys winteri. El diseño experimental incluye el programa de secado (2) y el espesor de la madera (2). Seis ensayos de secado a la escala piloto son ejecutados en un horno convectivo de 0.3 m³. Se evalúa la calidad final de la madera, basándose en standarizaciones europeas, considerando la homogeneidad y el gradiente de humedad final, las tensiones de secado y el colapso, las grietas superficiales e internas. Los alabeos del secado se evalúan aplicando las normas chilenas. Los resultados muestran que los programas de secado que se estudian permiten secar satisfactoriamente los renovales de canelo. El comportamiento de los renovales frente al secado es condicionado por la calidad de la madera a secar y el contenido de humedad inicial de la madera verdeIn this paper the wood drying schedules at conventional temperatures of Drimys winteri re-growths are studied. The experimental design includes as variables the drying schedules (2) and the wood thickness (2). Six drying runs at pilot scale are performed in a 0.3 m³ capacity laboratory dry kiln. The wood drying quality, being based on European standards is evaluated, considering moisture homogeneity, moisture gradient, casehardening, collapse, surface and internal checking. The drying defects are evaluated applying Chilean standards. The results show that the proposed drying schedules allow a satisfactory drying of canelo re-growths. The behaviour of the canelo re-growths during the drying are conditioned by the wood quality before the drying, and the initial moisture conten
Acción antimicótica in vitro de hojas y ramitas de Canelo (Drimys winteri J.R. & G. Forster)
No full textLa decocción y el extracto en acetato de etilo de hojas y ramitas trozadas de Canelo (Drimys winteri) inhibieron el desarrollo in vitro de Candida albicans, Aspergillus niger, A. fumigatus, Rhizopus oryzae, Mucor racemosus y M. hiemalis
ESTUDIO DE LA VELOCIDAD DEL SECADO DE RENOVALES DE CANELO DRIMYS WINTERI
No full textEn este trabajo se estudia experimentalmente la velocidad del secado artificial a temperaturas convencionales de renovales de canelo Drimys winteri. El diseño experimental incluye los programas de secado y el espesor de la madera. Seis ensayos son realizados usando madera de 25 y 50 mm de espesor, en un horno convectivo de 0.3 m³. La madera para los ensayos experimentales proviene de bosques de renovales creciendo en la zona de Lanco (X Región, Chile). Los resultados muestran que la velocidad del secado es limitada por la tendencia a los defectos del secado de los renovales de canelo. Las curvas de secado carecen de la etapa de velocidad de secado constante, la velocidad de secado máxima se encuentra en el rango de 1.72 x10-2 y 2.99x10-2 (%/h) y el contenido de humedad crítico varía entre 87 y 116
Paleomagnetism of Late Jurassic Rocks in the Northern Canelo Hills, Southeastern Arizona
No full textThe Canelo Hills volcanics are exposed in the Canelo Hills, a northwest trending range in Santa Cruz County, southeast Arizona. The formation is composed of silicic tuffs and flows as well as volcaniclastic conglomerates and sandstones. Strikes of the rocks are generally to the northwest with moderate dips to the southwest and northeast. Apparent age results from the sequence studied paleomagnetically include two published isotopic dates of 147 ± 6 Ma (K-Ar, biotite) and 149 ± 11 Ma (whole rock, Rb-Sr) and a Rb/Sr isochron age, reported here, which indicates an age of 151 ± 2 Ma. Paleomagnetic samples were collected from 17 cooling units in the northern Canelo Hills. Samples from most of these units responded to alternating field (af) demagnetization, and secondary components were generally erased by peak af between 10 and 50 mT. Samples from five sites showed no response to af demagnetization. Thermal demagnetization of samples from these units produced no significant changes in direction of natural remanent magnetization (NRM), although within-site clustering of NRM directions was improved. Data from two sites were rejected because of failure to isolate a well-determined characteristic NRM. Of the remaining 15 sites, 10 sites were of normal polarity, while five sites showed reversed polarity. Intensities of the characteristic NRM ranged from 4 × 10−3 to 3 × 10−1 A/m. The data from these 15 cooling units yield a formation mean direction of I = 29.9°, D = 334.9° with k = 33.4 and α95 = 6.7°. The resulting paleomagnetic pole is at 62.2°N, 130.3° (dp = 4.1°, dm = 7.4°). This pole is between poles obtained from the Summerville and lower Morrison formations. The Canelo Hills pole is thus consistent both in position and age with the Late Jurassic episode of rapid apparent polar wander originally defined by paleomagnetic data from the Summerville and Morrison formations
Durabilidad natural de la madera de renoval de Canelo (Drimys winteri J.R. Forst. & G. Forst.)
No full text23 páginasEl presente estudio tiene como objetivo general determinar la durabilidad natural de la madera de duramen de renoval de Canelo sometida a la acción de dos hongos xilófagos, uno de pudrición café y otro de pudrición blanca
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Effect of different drying conditions on volatile compounds of Canelo pepper (Drimys winteri)
No full textCanelo pepper is produced with the fruit of Drimys winteri (Winteraceae family). Driven by gourmet cuisine, this product is becoming increasingly in demand. The aim of this work was to study the effect of two drying conditions on the composition of the volatile compounds of Canelo pepper from Ushuaia forests (Argentina). Two treatments were evaluated. A mild drying (in a ventilated dryer, 2 days at 30 °C) that produced green pepper (G) and a strong drying (on an unventilated stove 6 days at 43 °C), which produced brown pepper (B). Untreated samples were used as fresh control (F). The profile of the volatile compounds of Canelo pepper varied when the fruits were dried and also changed with the drying conditions. Besides, the milder treatment affected the volatile compounds from the pepper to a lesser extent than the stronger drying.Instituto de Investigación de Tecnología de AlimentosFil: Negri Rodriguez, Livia María. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Tecnología de Alimentos; ArgentinaFil: Sponton, Emiliano Andres. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Sur. Agencia De Extensión Rural Ushuaia; ArgentinaFil: Salgado, Oscar. Municipalidad de Ushuaia. Laboratorio de Bromatología; ArgentinaFil: Sancho, Ana Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto Tecnología de Alimentos; ArgentinaFil: Denoya, Gabriela Inés. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Tecnología de Alimentos; Argentin
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