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Search Results: 1 - 10 of 491820 matches for " Alicia M. F.; Damborsky "
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Estadísticos poblacionales de Triatoma rubrovaria en condiciones de laboratorio
Oscherov,Elena B; Bar,María E; Damborsky,Miryam P; Milano,Alicia M F;
Revista de Saúde Pública , 2005, DOI: 10.1590/S0034-89102005000200011
Abstract: objective: to obtain t. rubrovaria population parameters in order to describe its demographic characteristics. methods: the study was carried out in the laboratory of arthropods, corrientes, argentina, from october 2000 to february 2003. eggs were grouped to form five 100-egg cohorts. insects were fed on chickens (gallus domesticus). the cohorts were monitored weekly and kept under controlled temperature (28±3°c) and relative humidity (63±10%). a life table was constructed and other vital statistics were calculated and recorded. results: higher mortality was recorded in the first through the fourth nymphal stadium. a constant decrease was seen from the fifth nymphal instar. life expectancy dropped linearly after overcoming the critical stages. adults mean survival was 50.2 weeks. the first oviposition was after 40.6 weeks. the fecundity was 859.6 eggs with an average 22.8 eggs per female. the reproductive period was 37.7 weeks. the generation time was 55.3 weeks and the net reproduction rate was 133.7. the intrinsic rate of weekly increment was 0.088. in a stable age distribution the population would be composed of 25.3% eggs, 72.3% nymphs and 2.4% adults. adults accounted for more than 70% of the total reproductive value. conclusions: triatoma rubrovaria had a long survival as imago, a late first reproduction and a low intrinsic rate of natural increase.
Patrones de alimentación y de defecación de Triatoma rubrovaria (Heteroptera: Reduviidae) bajo condiciones de laboratorio
Bar,María E.; Milano,Alicia M. F.; Damborsky,Miryam P.; Oscherov,Elena B.; Avalos,Gilberto;
Revista de la Sociedad Entomol?3gica Argentina , 2003,
Abstract: triatoma rubrovaria blanchard capability to colonize the domicile, to feed upon human and its trypanosoma cruzi chagas infection rates justify this investigation. the aim was to characterize the feeding and defecation patterns of t. rubrovaria under laboratory conditions. both patterns were evaluated simultaneously using 30 fourth-instar and 30 fifth-instar nymphs, and 30 adults. three repetitions for each nymphal stadium and for the adult stage were made. the insects were fed on chicken during one hour and were weighed before and after feeding, and the blood meal size was determined. the time of the first and subsequent defaecations were measured. it was confirmed blood ingestion in 97.0% of the triatomines and 84.7% fed to repletion. on average the attack time started after 2 minutes. feeding interruption was observed in 28.6% and was due principally to defecate or as a consequence of host irritability. the mean amount of blood obtained by the fifth-instar nymphs was greater than the blood ingested by the fourth-instar (358.1 and 120.9 mg, respectively) and the adults (73.5 mg). defecation was verified in the 92.4% of the feeding individuals. the first dejection was emitted on average at 1.7 minutes. it is concluded that t. rubrovaria was fast to obtain its bloodmeal and to emitt the first dejection. its potential as t. cruzi vector is discussed.
Patrones de alimentación y de defecación de Triatoma rubrovaria (Heteroptera: Reduviidae) bajo condiciones de laboratorio Feeding and defecation patterns in Triatoma rubrovaria (Heteroptera: Reduviidae) under laboratory conditions
María E. Bar,Alicia M. F. Milano,Miryam P. Damborsky,Elena B. Oscherov
Revista de la Sociedad Entomol?3gica Argentina , 2003,
Abstract: La capacidad de Triatoma rubrovaria Blanchard para colonizar la vivienda y alimentarse de sangre humana y sus índices de infección por Trypanosoma cruzi Chagas, justifican esta investigación. El objetivo fue caracterizar los patrones de alimentación y defecación en condiciones experimentales. Ambos patrones se evaluaron simultáneamente. Se utilizaron 30 ninfas de cuarto estadio, 30 de quinto y 30 adultos. Los ejemplares se alimentaron sobre ave (gallina) durante una hora. Se pesaron antes y después de la ingesta, calculándose por diferencia la cantidad de sangre ingerida. Se midió el tiempo en que ocurrió la primera defecación y siguientes. Se realizaron tres repeticiones para cada estadio ninfal y para el estado adulto. Se confirmó alimentación en 97,0% de los individuos, alimentándose a repleción el 84,7%. El ataque se inició en un tiempo promedio de 2 minutos. El 28,6% interrumpió la alimentación para defecar o por irritabilidad del huésped. En promedio las N5 consumieron más sangre que las N4 (358,1 y 120,9 mg respectivamente) y que los adultos (73,5 mg). Del total de individuos alimentados se verificó defecación en 92,4%. El tiempo promedio de la primera deyección fue de 1,7 minutos. Se concluye que T. rubrovaria mostró rapidez en la obtención del alimento y en la emisión de la primera defecación. Se discute su potencial como vector de T. cruzi. Triatoma rubrovaria Blanchard capability to colonize the domicile, to feed upon human and its Trypanosoma cruzi Chagas infection rates justify this investigation. The aim was to characterize the feeding and defecation patterns of T. rubrovaria under laboratory conditions. Both patterns were evaluated simultaneously using 30 fourth-instar and 30 fifth-instar nymphs, and 30 adults. Three repetitions for each nymphal stadium and for the adult stage were made. The insects were fed on chicken during one hour and were weighed before and after feeding, and the blood meal size was determined. The time of the first and subsequent defaecations were measured. It was confirmed blood ingestion in 97.0% of the triatomines and 84.7% fed to repletion. On average the attack time started after 2 minutes. Feeding interruption was observed in 28.6% and was due principally to defecate or as a consequence of host irritability. The mean amount of blood obtained by the fifth-instar nymphs was greater than the blood ingested by the fourth-instar (358.1 and 120.9 mg, respectively) and the adults (73.5 mg). Defecation was verified in the 92.4% of the feeding individuals. The first dejection was emitted on average at 1.7 minutes. It i
20 T dipoles and Bi-2212: the path to LHC energy upgrade
P. M. McIntyre,K. Damborsky,E. F. Holik,F. Lu,A. D. McInturff,N. Pogue,A. Sattarov,E. Sooby
Physics , 2011,
Abstract: Increasing the energy of the LHC would require a ring of \sim20 T magnets using the superconductors Nb3Sn and Bi-2212/Ag. The technology for Bi-2212/Ag wire, cable, and coil has advanced significantly but is still far short of the performance needed for such magnets. New technol-ogy for both wire and cable is under development, which if successful would yield the needed performance.
Contaminación de aceras con enteroparásitos caninos en Corrientes, Argentina
MILANO,ALICIA M. F.; OSCHEROV,ELENA B.;
Parasitología latinoamericana , 2005, DOI: 10.4067/S0717-77122005000100015
Abstract: the present investigation was carried out in order to evaluate the canine parasites contamination in corrientes city sidewalks. the samples of canine faecal matter proceeding the city were analysed. samples were processed individually by the following methods: sedimentation through centrifugation and willis flotation. from 362 samples analized, 58.6% (n = 212) were positive. the species identified were ancylostoma sp. (41.2%), toxocara canis (16.0%), coccidios (10.5%), giardia sp . (5.5%), trichuris vulpis (4.7%), diphyllobothriidae (2.8%) and dipylidium caninum (0.3%). it is stated once again the necessity to stablish rules and strict sanitary and environmental controls
Contaminación de aceras con enteroparásitos caninos en Corrientes, Argentina SIDEWALKS CONTAMINATION WITH CANINES ENTEROPARASITES IN CORRIENTES, ARGENTINE
ALICIA M. F. MILANO,ELENA B. OSCHEROV
Parasitología latinoamericana , 2005,
Abstract: Para evaluar la contaminación de las aceras con parásitos caninos en la ciudad de Corrientes, se tomó una muestra de cada una de 362 heces presentes en las aceras. Las muestras se procesaron en forma individual mediante los métodos de sedimentación por centrifugación con agua y flotación de Willis (solución saturada de NaCl). La prevalencia parasitaria general fue de 58,6% (n = 212). Las especies identificadas fueron: Ancylostoma sp. (41,2%), Toxocara canis (16,0%), Coccidios (10,5%), Giardia sp. (5,5%), Trichuris vulpis (4,7%), Diphyllobothriidae (2,8%) y Dipylidium caninum (0,3%) The present investigation was carried out in order to evaluate the canine parasites contamination in Corrientes city sidewalks. The samples of canine faecal matter proceeding the city were analysed. Samples were processed individually by the following methods: sedimentation through centrifugation and Willis flotation. From 362 samples analized, 58.6% (n = 212) were positive. The species identified were Ancylostoma sp. (41.2%), Toxocara canis (16.0%), coccidios (10.5%), Giardia sp . (5.5%), Trichuris vulpis (4.7%), Diphyllobothriidae (2.8%) and Dipylidium caninum (0.3%). It is stated once again the necessity to stablish rules and strict sanitary and environmental controls
Coherent Line Removal: Filtering out harmonically related line interference from experimental data, with application to gravitational wave detectors
Alicia M. Sintes,Bernard F. Schutz
Physics , 1998, DOI: 10.1103/PhysRevD.58.122003
Abstract: We describe a new technique for removing troublesome interference from external coherent signals present in the gravitational wave spectrum. The method works when the interference is present in many harmonics, as long as they remain coherent with one another. The method can remove interference even when the frequency changes. We apply the method to the data produced by the Glasgow laser interferometer in 1996 and the entire series of wide lines corresponding to the electricity supply frequency and its harmonics are removed, leaving the spectrum clean enough to detect possible signals previously masked by them. We also study the effects of the line removal on the statistics of the noise in the time domain. We find that this technique seems to reduce the level of non-Gaussian noise present in the interferometer and therefore, it can raise the sensitivity and duty cycle of the detectors.
Removing non-stationary, non-harmonic external interference from gravitational wave interferometer data
Alicia M. Sintes,Bernard F. Schutz
Physics , 1999, DOI: 10.1103/PhysRevD.60.062001
Abstract: We describe a procedure to identify and remove a class of non-stationary and non-harmonic interference lines from gravitational wave interferometer data. These lines appear to be associated with the external electricity main supply, but their amplitudes are non-stationary and they do not appear at harmonics of the fundamental supply frequency. We find an empirical model able to represent coherently all the non-harmonic lines we have found in the power spectrum, in terms of an assumed reference signal of the primary supply input signal. If this signal is not available then it can be reconstructed from the same data by making use of the coherent line removal algorithm that we have described elsewhere. All these lines are broadened by frequency changes of the supply signal, and they corrupt significant frequency ranges of the power spectrum. The physical process that generates this interference is so far unknown, but it is highly non-linear and non-stationary. Using our model, we cancel the interference in the time domain by an adaptive procedure that should work regardless of the source of the primary interference. We have applied the method to laser interferometer data from the Glasgow prototype detector, where all the features we describe in this paper were observed. The algorithm has been tuned in such a way that the entire series of wide lines corresponding to the electrical interference are removed, leaving the spectrum clean enough to detect signals previously masked by them. Single-line signals buried in the interference can be recovered with at least 75 % of their original signal amplitude.
Pediculosis y otras ectoparasitosis en una población infantil urbana del nordeste argentino
MILANO,ALICIA M. F.; OSCHEROV,ELENA B.; LEGAL,ADRIANA Z;
Parasitología latinoamericana , 2007, DOI: 10.4067/S0717-77122007000100015
Abstract: the aim of the present investigation was to evaluate infant pediculosis and other ectoparasitosis in susceptible hosts, presents in the domestic environment of santa ana de los guacaras town, in corrientes, argentina. forty four houses were polled. one hundred and forty eight children between 1 and 14 years-old and eighty domestic animals were parasitological evaluated (54 dogs, 21 cats, three rabbits and two pigs). a range degree of contact between children and animals was established. direct observation of the environment and the application of semi structured polls were performed to collect the data. the global frequency of infant ectoparasitosis was 58.8% (87/148). pediculus capitis was the most frequent ectoparasite, present in 56.8% of the population, tunga penetrans in 12.2% and pulex irritans in 4.3%. two children infested with ctenocephalides felis and two with rhipicephalus sanguineus were observed. the animals presented infestation with r. sanguineus, c. felis, amblyomma tigrinum, t. penetrans and p. irritans. all the children with lice presented confirmed active pediculosis. same fleas and ticks species infested human and domestics animals to prove the antropozoonotic character of these arthropods. the infestation was verified in scholar an in less than five years-old, it's necessary to develop control strategies in a short term
Pediculosis y otras ectoparasitosis en una población infantil urbana del nordeste argentino PEDICULOSIS AND OTHER PARASITOSIS IN A NORTHEAST ARGENTINE CHILDREN POPULATION
ALICIA M. F. MILANO,ELENA B. OSCHEROV,ADRIANA Z LEGAL
Parasitología latinoamericana , 2007,
Abstract: El objetivo del presente trabajo fue evaluar la pediculosis infantil y otras ectoparasitosis en los hospedadores susceptibles, presentes en el ámbito doméstico de Santa Ana de los Guacaras, Corrientes, Argentina. Se encuestaron 44 hogares. Se evaluaron parasitológicamente 148 ni os entre 1 y 14 a os de edad y 80 animales domésticos (54 perros, 21 gatos, tres conejos y dos cerdos). Se estableció el grado de contacto de los ni os con los animales. La toma de datos ambientales se realizó a través de observación directa del entorno y de la aplicación de encuestas semiestructuradas. La frecuencia global de ectoparasitosis infantil fue 58,8% (87/148). El ectoparásito mas frecuente fue Pediculus capitis, presente en el 56,8% de los ni os seguido por Tunga penetrans en el 12,2% y Pulex irritans en el 4,3%. Se observaron dos ni os infestados con Ctenocephalides felis y dos con Rhipicephalus sanguineus. Los animales presentaron infestación con R. sanguineus, C. felis, Amblyomma tigrinum, T. penetrans y P. irritans. Todos los ni os con piojos presentaron pediculosis activa confirmada. Se destaca el carácter antropo-zoonótico de las pulgas y garrapatas al comprobar la infestación humana y de los animales de compa ía con las mismas especies de éstos artrópodos. Los ectoparásitos hematófagos hallados, no solamente en ni os en edad escolar sino también en menores de cinco a os, demuestra la necesidad de desarrollar estrategias de control a corto plazo. The aim of the present investigation was to evaluate infant pediculosis and other ectoparasitosis in susceptible hosts, presents in the domestic environment of Santa Ana de los Guacaras town, in Corrientes, Argentina. Forty four houses were polled. One hundred and forty eight children between 1 and 14 years-old and eighty domestic animals were parasitological evaluated (54 dogs, 21 cats, three rabbits and two pigs). A range degree of contact between children and animals was established. Direct observation of the environment and the application of semi structured polls were performed to collect the data. The global frequency of infant ectoparasitosis was 58.8% (87/148). Pediculus capitis was the most frequent ectoparasite, present in 56.8% of the population, Tunga penetrans in 12.2% and Pulex irritans in 4.3%. Two children infested with Ctenocephalides felis and two with Rhipicephalus sanguineus were observed. The animals presented infestation with R. sanguineus, C. felis, Amblyomma tigrinum, T. penetrans and P. irritans. All the children with lice presented confirmed active pediculosis. Same fleas and ticks species infe
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