Showing papers by "Universidade Federal Rural do Rio de Janeiro published in 1992"
TL;DR: In this article, the authors investigated the combined influence of three different flow velocities (high, 22.6 cm s −1 ; medium, 11.0 cm s−1 ; low, below 2 cm s-1 ) and substrate (mud, sand and gravel) on the growth of Ranunculus aquatilis L.
29 citations
TL;DR: An analysis of the helminth fauna using the importance value of the species collected indicated that in the sparrow the dominant species are: Leucochloridium parcum, Tanaisia inopina, Choanotaenia passerina, Dispharynx nasuta and Tetrameres minima; and the co-dominant species are Echinostoma revolutum, Eumegacetes mediximus and Mediorhynchus papill
Abstract: Sparrows captured in Campo Grande, Rio de Janeiro, RJ, were examined through necropsy and the helmints found were identified. The prevalence, intensity of infection and the habitat of each helminth species found are showed. An analysis of the helminth fauna using the importance value of the species collected indicated that in the sparrow the dominant species are: Leucochloridium parcum, Tanaisia inopina, Choanotaenia passerina, Dispharynx nasuta and Tetrameres minima; and the co-dominant species are: Echinostoma revolutum, Eumegacetes mediximus and Mediorhynchus papillosus. According to the host specificity were classified as specialist species: L. parcum, T. inopina, C. passerina and T. minima; and as generalist species: E. revolutum, E. medioximus, D. nasuta and M. papillosus. Echinostoma revolutum was found for the first time in P. domesticus. The species E. medioximus , T. minima and D. nasuta were found for the first time in the sparrow in Brazil. The species C. passerina and M. papillosus were found for the first time in Brazil, expanding their distribution to the Neotropical region.
20 citations
TL;DR: In this paper, the occurrence of F. hepatica was confirmed in 64.82% of the municipalities and the percentage of occurence for host species was 27.86 in cows, 24.72 in water buffaloes, 16.92 in sheeps and 15.66 in goats.
Abstract: During 12 years feces samples from cows, water buffaloes, sheeps and goats were examined by sequencial tamis filtration to show the occurence of Fasciola hepatica eggs. The material came from 129 municipalities of Santa Catarina State, and 5 g of feces per animal were examined. The occurrence of F. hepatica was confirmed in 64.82% of the municipalities. Considering the host, F. hepatica was confirmed in goats from Florianopolis, Sao Jose, Sao Joao Batista and Guaramirim municipalities; in sheeps from Brusque, Pomerode, Palhoca and Sao Jose; in water buffaloes from 9 and in cows from 86 municipalities. For this study, 13,762 feces samples were examined and in 3,814 the presence of eggs of F. hepatica was demonstrated. The percentage of occurence for host species was 27.86 in cows, 24.72 in water buffaloes, 16.92 in sheeps and 15.66 in goats. By the results it was demonstrated that Itajai Valley at Southest Hidrographic Basin, in Santa Catarina State is an endemic area of F. hepatica, even though Uruguai Hidrographic Basin was not referred as a geographical record for this parasite.
17 citations
TL;DR: The rate constants for photoenols generated by irradiation of ortho-methylacetophenone, ortho -methylbenzophenone and ortho −benzylbenzone are readily quenched by acids and bases.
15 citations
TL;DR: Threshold temperatures for males and females were a little higher than for females, however, this difference was lesser than 1 decree C, and the quantity of energy (GD) for developing females was a little lower than for males.
Abstract: The biology of immature stages of Stomoxys calcitrans (L.) was studied in the laboratory under four constant temperatures. The study was carried out in biological incubators at 20, 25, 30 and 35 degrees C; 65 +/- 10% relative humidity and 14 hours of photophase. The most favorable temperature for developing eggs, larval and pupal was 25 degrees C, while 35 degrees C proved to be harmful for a normal developing of S. calcitrans in larval stage. The incubation periods for egg were 69.90, 42.58, 26.10, 21.78 hours and 2.91, 1.77, 1.08, 0.90 days at 20, 25, 30, 35 degrees C, respectively. The larval stage was 18.40, 11.63, 8.55 days and, the pupal stage, 8.60, 4.54, 3.60 days at 20, 25, 30 degrees C, respectively.. Threshold temperatures for males were a little higher than for females, however, this difference was lesser than 1 decree C. On the other hand, the quantity of energy (GD) for developing females was a little higher than for males.
14 citations
TL;DR: Acini in in the salivary glands of female tick specimens of Amblyomma ajennense unfed at both postnymphal and adult phases, were studied.
Abstract: Acini in in the salivary glands of female tick specimens of Amblyomma ajennense unfed at both postnymphal and adult phases, were studied. The salivary glands are consisted by three acini, one agranular and two granular. The agranular acini are directly attached to the anterior portion of the main salivary duct, consisting of cells without valve. A relatively large, clear, central cell occupies most of the alveolar midsection. The central cell is in contact with the acini lumen. Granular acini consist of approximately seven to fourteen cells (type II acini) or seven to sixteen (type III acini). The type II acini have three types of granular cells ("a", "b" and "c") and valve; the type III acini have another three types of granular cells ("d", "e" and "f") also presenting a valve.
13 citations
12 citations
TL;DR: In this paper, the symplectic method is applied to obtain the physical variables and the physical Hamiltonian in two examples of gauge theories: the electrodynamics in the Coulomb gauge and the two-dimensional bosonic Schwinger model.
Abstract: The symplectic method is applied to obtain the physical variables and the physical Hamiltonian in two examples of gauge theories: the electrodynamics in the Coulomb gauge and the two-dimensional bosonic Schwinger model.
10 citations
TL;DR: Flushing the ear canals of sheep and goats with approximately 50 ml of water appreared to be more efficient than swabbing or otoscopic examination for diagnosis and/or mite collection.
Abstract: Subclinical psoroptic otocariasis associated withPsoroptes cuniculi (Delafond) was diagnosed in four out of ten herds of sheep. Transmission of mites between sheep and goats and vice versa was detected in herds kept on the same pastures for over 2 years. Flushing the ear canals of sheep and goats with approximately 50 ml of water appreared to be more efficient than swabbing or otoscopic examination for diagnosis and/or mite collection.
10 citations
TL;DR: Foram estudadas 296 cabras leiteiras, de diferentes racas, em 10 rebanhos leiteiros no Estado do Rio de Janeiro, e no "California Mastitis Test" 179 (60%) cabras se apresentaram positivas em um ou dois tetos.
Abstract: Foram estudadas 296 cabras leiteiras, de diferentes racas, em 10 rebanhos leiteiros no Estado do Rio de Janeiro. No "California Mastitis Test" (CMT) 179 (60%) cabras se apresentaram positivas em um ou dois tetos. Para o estudo bacteriologico foram colhidas 585 amostras de leite, 290 CMT positivas e 295 negativas. Do total destas amostras, estafilococos coagulase negativos foram isolados em216, predominando as especies S. epidermidis, S. caprae, S. simulanse e S. xylosus.
9 citations
01 Jan 1992
TL;DR: Nice Shindo 1, Roberto Krengiel 1, Paulo S.T. Brioso 2, Ana Carolina P. Vicente 3, Mauro Weyne 1, Dulce E. de Oliveira 1,4, and Benedikt Timmerman I 1.
Abstract: Nice Shindo 1, Roberto Krengiel 1, Paulo S.T. Brioso 2, Ana Carolina P. Vicente 3, Mauro Weyne 1, Dulce E. de Oliveira 1,4, and Benedikt Timmerman I 1Departamento de Gen&ica, Universidade Federal do Rio de Janeiro, CP68011, 21944 Rio de Janeiro, Brazil (* author for correspondence); 2 Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brazil,\" 3 Fundafglo Oswaldo Cruz, Rio de Janeiro, Brazil,\" 4 Departamento de Bioqu[mica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
30 Apr 1992
01 Jan 1992
TL;DR: No significant difference was observed on average duration of first and second larval instars berween the two morphotypes, but the incubation period was significantly longer for eggs posited by females from non-pigmented larvae.
Abstract: The possible dissimilitudes relating to the duration of the egg incubation period and larval stage of Cochliomyia macellaria (Fab., 1775) from offsprings of females from larvae with and without pigmentation on Malpighi tubules, morphotype 1 and 2, respectively, was questioned. The experiment was conducted in climatized chamber regulated at 30oC, 65±10% RH and 14 hour photophase. No significant difference was observed on average duration of first and second larval instars berween the two morphotypes, taking into account not only the conventional interpretation for the reading of different development phases of the larval stages (morphotype 1:11.0 and 11.9 hours and morphotype 2:11.7 and 12.7 hours for first and second instars, respectively), but also the reading made through the interpretation preconized by Snodgrass & Hinton (morphotype 1:10.3 and 9.6 hours and morphotype 2:9.8 and 10.8 hours for the first and second instars, respectively). The incubation period was significantly longer for eggs posited by females from non-pigmented larvae.