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Far infrared optical properties of V and Cr doped Sb2Te3 /

The far infrared reflectance of Sb2Te3 , Sbi.97Vo.o3Te3 and Sbi.94Cr .o6Te3 was measured near normal incidence at different temperatures (between 45K and 300K). The direct current resistivities of the above samples were also measured between the temperatures of 4K and 300K. Also Kramers Kronig (KK) analyses were performed on the reflectance spectra to obtain the optical conductivities. In the doped samples, it was observed that a phonon at 62cm-1 softens to about 55cm-1 on decreasing the temperature from 295K to 45K. Also, it was observed that the plasma frequency of the doped samples is independent of doping. The scattering rate for the vanadium doped sample was seen to be greater than that for the chromium doped sample despite the fact that vanadium impurity density is less than that of chromium. The Drude-Lorentz model fits to the KK optical conductivity show that the samples used in this work are conventional metals. Definitive measurements of the temperature dependence of the scattering rate across the ferromagnetic transition await equipment changes allowing measurements at low temperature using the mercury cadmium telluride (MCT) detector.

Epidemiology and phylogenetic analysis of West Nile virus in Ontario, Canada, 2002-2003 /

Since the discovery of West Nile (WN) virus in the Western Hemisphere many surveillance programs have been implemented to monitor the epidemiology and genetic variation of WN virus in North America. This project was based on the WN virus Adult Mosquito Identification and Diagnostic Program conducted at Brock University for Ontario, Canada, during the 2002 and 2003 transmission seasons. There are three sections to this thesis. The first section investigated which mosquito species carry WN virus in Ontario, Canada throughout the 2002-2003 transmission seasons. It was found that from the 2002 data, eight mosquito species were detected with WN virus (Aedes vexans, Anopheles punctipennis, Coquilleltidia perlurbans, Culex salinarius, Cx. pipiens, Cx. resluans, Ochlerolalus Irivillalus and Och. Iriserialus) and 7.19% of the total mosquito pools tested were found to be WN virus positive (129 positive poolsll, 793 total pools tested). In 2003, WN virus was detected in only five mosquito species (Ae. vexans, Cx. salinarius, Och. Iriserialus, Cx. pipiens and Cx. resluans) and 1.42% of the total mosquito pools tested were WN virus positive (101 positive poolsl7,1 01 total pools tested). WN virus positive mosquito pools were detected 3-4 weeks earlier in 2002 compared to 2003 data. The second section investigated the actual infection rate (IR) of clearly identified Cx. pipiens and Cx. resluans from the 2002 outbreak. It was found that significantly more ex. resluans were infected with WN virus compared to ex. pipiens. The third section investigated the degree of variability of the WN virus genome. A 879 nucleotide section of the WN virus genome was amplified from 21 American Crows and 20 adult female mosquitoes from Ontario, Canada, and compared to the homologous region of the original New York 1999 Chilean Flamingo sequence (NY99FL). Seventy-two nucleotides from Ontario WN virus sequences showed variability compared to NY99FL with 10 synapotypic changes. Phylogenetic analysis revealed a close relationship between Ontario and US WN virus sequences.

Utilización de subproductos de camarón coextruidos con pasta de soya como ingrediente en dietas balanceadas para camarón Penaeus vannamei

Tesis (Maestría en Ciencias con Especialidad en Recursos Alimenticios y Producción Acuícola) UANL

Mosquitos domiciliarios (Díptera: culicidae) y su relación como vectores de arbovirus en la ciudad de Mérida, Yucatán, México.

Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL

Teatro mexicano : descripción breve de los sucesos exemplares, históricos, políticos, militares, y religiosos del nuevo mundo Occidental de las Indias

UANL

Discvrsos morales para las dominicas de adviento y las demas asta qvaresma predicados por el padre Manvel de Naxera, catedratico antes de sagrada escritura en su Colegio de la Conpañia de Iesus de la Vniuersidad de Alcala, y despues de politicas en el Imperial de Madrid.

UANL

Qvaresma continva : Oraciones evangelicas para todos los dias

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Dionysii Petavii Aurelianensis e societate Jesu, opus de : doctrina temporatum: in quo uranologium

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Oraciones varias, consagradas a Maria Señora Nuestra, Madre de Dios, y pecadores, que predico y dexo escritas el Rmo. P. M. Manuel de Guerra y Rivera.

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Oraciones varias, consagradas a Maria Señora Nuestra, Madre de Dios, y pecadores

UANL

Concilium mexicanum provinciale III celebratum mexici anno MDLXXXV praeside d. d. Petro Moya.

UANL

Festividades de María Santissima, consagradas a su magestad soberana

UANL

Vida de San Luis Gonzaga : patrono de la juventud

UANL