124 research outputs found
Satellite Determination of Earth Orientation with Emphasis on GPS
No full textThe ``classical'' satellite-based technique for determination of earth orientation (polar motion and changes in UT1/length of day) is laser ranging to the Lageos spacecraft. With the deployment of more GPS satellites and many high quality ground receivers, GPS-based approaches to EOP determination seem likely to achieve similar or better accuracies, with improved temporal resolution. Additional satellite methods make use of laser tracking to the Starlette or to the two Etalon spacecraft. The objective of the paper is to compare results obtained from these various techniques, using a common software package developed at ESOC for high precision orbit determination. The main emphasis is on experience gained during the IGS 1992 Campaign, one of the objectives of which was to assess the capability of GPS for fast, routine, high accuracy estimation of earth orientation
Incio da Atividade de Vo em Triatoma infestans (Klug, 1834) e T. melanosoma Martnez, Olmedo & Carcavallo, 1987 (Hemiptera, Reduviidae) Cleber Galvo+, Dayse da Silva Rocha, Jos Jurberg, Rodolfo Carcavallo
No full textMem Inst Oswaldo Cruz 2001, Volume 96, Number 1, pp. 137-140 Incio da
Atividade de Vo em Triatoma infestans (Klug, 1834) e T. melanosoma
Martnez, Olmedo & Carcavallo, 1987 (Hemiptera, Reduviidae) Cleber
Galvo+, Dayse da Silva Rocha, Jos Jurberg, Rodolfo Carcavallo Cleber
Galvao+, Dayse da Silva Rocha, Jose Jurberg, Rodolfo Carcavallo Code
Number: oc01017 ABSTRACT: Flight Initiation in Triatoma infestans and
T. melanosoma (Hemiptera, Reduviidae) - The flight initiation of T.
infestans, the main vector of Chagas disease in the Southern Cone
countries of Latin America, and of the closely-related species T.
melanosoma was studied in laboratory. The results demonstrated that
after the beginning of observations the peak of the flight activity was
about 14 days after feeding in both species and it was usually more
marked in the females than in the males, but there were no significant
differences in the flight behaviour of the two species. KEYWORDS:
Triatoma infestans, Triatoma melanosoma, flight initiation Copyright
2001 Fundacao Oswaldo Cruz Fiocru
Incio da Atividade de Vo em Triatoma infestans (Klug, 1834) e T. melanosoma Martnez, Olmedo & Carcavallo, 1987 (Hemiptera, Reduviidae) Cleber Galvo+, Dayse da Silva Rocha, Jos Jurberg, Rodolfo Carcavallo
No full textMem Inst Oswaldo Cruz 2001, Volume 96, Number 1, pp. 137-140 Incio da
Atividade de Vo em Triatoma infestans (Klug, 1834) e T. melanosoma
Martnez, Olmedo & Carcavallo, 1987 (Hemiptera, Reduviidae) Cleber
Galvo+, Dayse da Silva Rocha, Jos Jurberg, Rodolfo Carcavallo Cleber
Galvao+, Dayse da Silva Rocha, Jose Jurberg, Rodolfo Carcavallo Code
Number: oc01017 ABSTRACT: Flight Initiation in Triatoma infestans and
T. melanosoma (Hemiptera, Reduviidae) - The flight initiation of T.
infestans, the main vector of Chagas disease in the Southern Cone
countries of Latin America, and of the closely-related species T.
melanosoma was studied in laboratory. The results demonstrated that
after the beginning of observations the peak of the flight activity was
about 14 days after feeding in both species and it was usually more
marked in the females than in the males, but there were no significant
differences in the flight behaviour of the two species. KEYWORDS:
Triatoma infestans, Triatoma melanosoma, flight initiation Copyright
2001 Fundacao Oswaldo Cruz Fiocru
Role of Two Triatoma (Hemiptera: Reduviidae: Triatominae) Species in the Transmission of Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) to Man in the West Coast of Mexico
No full textMem Inst Oswaldo Cruz 2001, Volume 96, Number 2, pp. 141-144 Role of
Two Triatoma (Hemiptera: Reduviidae: Triatominae) Species in the
Transmission of Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) to
Man in the West Coast of Mexico Jos Alejandro Martnez-Ibarra/+, Nina
Malena Brcenas-Ortega, Benjamn Nogueda-Torres*, Ricardo
Alejandre-Aguilar*, Milton Lino Rodrguez*, Ezequiel Magalln-Gastlum**,
Vctor Lpez-Martnez, Jess Romero-Npoles Code Number: oc01018 ABSTRACT:
From August 1997 to August 1998, 334 specimens of Triatoma longipennis
and 62 of T. picturata were collected in four groups of localities
placed in the zone from Guadalajara, Jalisco to Tepic, Nayarit, in the
West Coast of Mexico. Most T. longipennis were collected outdoors
(69.2%) while most T. picturata (58.1%) were collected indoors. All
collected specimens were examined for Trypanosoma cruzi infection,
which was detected on 98 (29.3%) T. longipennis and 17 (27.4%) T.
picturata. This study confirms the role of T. longipennis and T.
picturata as some of the main T. cruzi vectors to humans in Mexico.
Habitation Infestation Rate with T. longipennis was of 0.09 and with T.
picturata was of 0.03 and the predominating ecotopes were pile of
blocks, chicken coops, pigsties, wall crawls and beds. KEYWORDS:
Triatoma, Trypanosoma cruzi, West Coast, Mexico Copyright 2001
Fundacao Oswaldo Cruz Fiocru
Invertible Subspace-Hypercyclic Operators
No full textA bounded linear operator on a Banach space X is called
subspace-hypercyclic for a subspace M if Orb(T, x) \ M is dense in
M for a vector x 2 M. In this paper we give conditions under which
an operator is M-hypercyclic. Then by this result, we answer in the
affirmative a question that recently raised by Madore and Martnez-
Avendano
Direct and inverse StaeblerWronski effects observed in carbon-doped hydrogenated amorphous silicon photo-detectors
No full textArce, P., Barcala, J.M., Calvo, E., Ferrando, A., Josa, M.I., Molinero, A., Navarrete, J., Oller, J.C., Yuste, C., Brochero, J., Caldern, A., Fernndez, M.G., Gmez, G., Gonzlez-Snchez, F.J., Martnez-Rivero, C., Matorras, F., Rodrigo, T., Ruiz-Rbol, P., Scodellaro, L., Sobrn, M., Vila, I., Virto, A.L., Fernndez, J
Role of Two Triatoma (Hemiptera: Reduviidae: Triatominae) Species in the Transmission of Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) to Man in the West Coast of Mexico
No full textMem Inst Oswaldo Cruz 2001, Volume 96, Number 2, pp. 141-144 Role of
Two Triatoma (Hemiptera: Reduviidae: Triatominae) Species in the
Transmission of Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) to
Man in the West Coast of Mexico Jos Alejandro Martnez-Ibarra/+, Nina
Malena Brcenas-Ortega, Benjamn Nogueda-Torres*, Ricardo
Alejandre-Aguilar*, Milton Lino Rodrguez*, Ezequiel Magalln-Gastlum**,
Vctor Lpez-Martnez, Jess Romero-Npoles Code Number: oc01018 ABSTRACT:
From August 1997 to August 1998, 334 specimens of Triatoma longipennis
and 62 of T. picturata were collected in four groups of localities
placed in the zone from Guadalajara, Jalisco to Tepic, Nayarit, in the
West Coast of Mexico. Most T. longipennis were collected outdoors
(69.2%) while most T. picturata (58.1%) were collected indoors. All
collected specimens were examined for Trypanosoma cruzi infection,
which was detected on 98 (29.3%) T. longipennis and 17 (27.4%) T.
picturata. This study confirms the role of T. longipennis and T.
picturata as some of the main T. cruzi vectors to humans in Mexico.
Habitation Infestation Rate with T. longipennis was of 0.09 and with T.
picturata was of 0.03 and the predominating ecotopes were pile of
blocks, chicken coops, pigsties, wall crawls and beds. KEYWORDS:
Triatoma, Trypanosoma cruzi, West Coast, Mexico Copyright 2001
Fundacao Oswaldo Cruz Fiocru
First identification of excited states in 59Zn
No full textExcited states in 59Zn were observed for the first time following the fusion-evaporation reaction 24Mg + 40Ca at a beam energy of 60 MeV. The GASP array in conjunction with the ISIS Silicon ball and the NeutronRing allowed for the detection of n-rays in coincidence with evaporated light particles. The mirror symmetry of 59Zn and 59Cu is discussed
Humoral Immune Response against a Hepatitis C Virus Envelope E2 Variant Expressed in Escherichia coli
No full textBiotecnologa Aplicada 2000;17:231-234 Humoral Immune Response against
a Hepatitis C Virus Envelope E2 Variant Expressed in Escherichia coli
Author: Gillian Martnez, Ariel Via, Madeleine Borges, Eduardo Martnez,
Juan Morales Code Number: ba00071 ABSTRACT A hepatitis C virus
(HCV) E2 variant encompassing amino acids 458 to 680 was expressed in
Escherichia coli. The recombinant product (His-E2680) was
immunoidentified as a 30-kD protein using the serum from a patient with
chronic hepatitis C, and was purified using Ni2+-NTA chelate
chromatography. When HCV-positive human sera were tested with the
His-E2680 protein, 39% of them showed anti-E2 reactivity. ELISA
experiments showed that this antigen was very immunogenic in immunized
rabbits. Using synthetic peptides, we identified an immunologically
relevant region in the 643-671 segment of the His-E2680 protein.
Keywords: E2 protein, E. coli expression, humoral immune response, HCV
RESUMEN Respuesta inmune humoral contra una variante de la protena E2
del virus de la hepatitis C expresada en Escherichia coli. Se expres en
Escherichia coli una variante de la protena E2 del virus de la
hepatitis C (VHC), que comprende los aminocidos entre 458 y 680. El
producto recombinante (His-E2680) fue immunoidentificado como una
protena de 30 kD con un suero de un paciente infectado crnicamente por
el VHC, y fue purificado mediante cromatografa de afinidad por iones
metlicos (Ni2+-NTA). La protena His-E2680 mostr 39% de reactividad
frente a un panel de sueros humanos positivos para el VHC. Mediante un
ELISA se demostr la alta inmunogenicidad de este antgeno en conejos, y
mediante la utilizacin de pptidos sintticos identificamos una regin
inmunodominante comprendida entre los aminocidos 643 y 671 de la
protena His-E2680. Palabras claves: expresin en E. coli, protena E2,
respuesta inmune humoral, VHC Copyright Elfos Scientiae 200
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