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Search Results: 1 - 10 of 305153 matches for " Kátia G.;Kokubum "
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Species richness, relative abundance, and habitat of reproduction of terrestrial frogs in the Triangulo Mineiro region, Cerrado biome, southeastern Brazil
Giaretta, Ariovaldo A.;Menin, Marcelo;Facure, Kátia G.;Kokubum, Marcelo N. de C.;Oliveira Filho, Júlio C. de;
Iheringia. Série Zoologia , 2008, DOI: 10.1590/S0073-47212008000200002
Abstract: based on field observations and pitfall sampling, we determined the species richness, relative abundance, and reproductive habitat of terrestrial frogs in three municipalities in the triangulo mineiro region, south cerrado biome, in southeastern brazil. we found thirty-two species of terrestrial frogs, belonging to the families brachycephalidae, bufonidae, cycloramphidae, dendrobatidae, leiuperidae, leptodactylidae and microhylidae. most of the species were found in open areas and reproduced in human-generated environments, such as artificial lakes (10 species) and ponds (14 species). dominance was high, with physalaemus cuvieri fitzinger, 1826 (leiuperidae) representing 48% of sampled frogs. a larger number of individuals was captured in the wet season, when most of the species were reproducing. compared to other areas of cerrado biome, the triangulo mineiro sites presented a larger number of species, which may be attributed to the larger sampled area and greater sampling effort, lower altitude and presence of human generated habitats. the richness of terrestrial frogs was also larger than that in some forested localities in southeastern brazil, indicating that the number of species cannot be explained only by precipitation and type of vegetation cover. the greater abundance of individuals during the wet season may be related to a greater movement of adults to breeding sites and to juvenile recruitment/dispersion. the heterogeneity of environments in the cerrado biome, including its several isolated highlands, contributes to its high (local and regional) diversity of frogs.
Antibacterial Effect of Aqueous Extracts and Bioactive Chemical Compounds of Coffea canephora against Microorganisms Involved in Dental Caries and Periodontal Disease  [PDF]
Flávia M. da Silva, Natalia L. P. Iorio, Leandro A. Lobo, Kátia Regina N. dos Santos, Adriana Farah, Lucianne C. Maia, Andréa G. Antonio
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.414109
Abstract: This study aimed to evaluate the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of Coffea canephora aqueous extract (Cc), trigonelline (Tg) and 5-caffeoylquinic acid (5-CQA) against cariogenic microorganisms: Streptococcus parasanguinis ATCC 903 (SP), Lactobacillus rhamnosus ATCC 9595 (LR); and pathogens related to periodontal disease: Porphyromonas gingivalis ATCC 33277 (PG), Fusobacterium nucleatum ATCC 25586 (FN), Prevotella intermedia ATCC 49046 (PI) and Prevotella nigrescens ATCC 33563 (PN). Different concentrations of Cc (0.15625 to 10 mg/mL), Tg and 5-CQA (0.005 to 10.24 mg/mL) were tested. Chlorhexidine (0.05%) was used as positive control and the substances without the inoculum comprised the blank control. The Cc showed bacteriostatic action against SP (MIC = 5 mg/mL) and LR (MIC = 10 mg/mL). Tg showed bacteriostatic action against SP (MIC = 2.56 to 1.28 mg/mL), LR (MIC = 2.56 mg/mL), PG (MIC = 2.56 to 1.28 mg/mL), FN (MIC = 5.12 mg/mL), PN (MIC = 2.56 mg/mL), and PI (MIC = 2.56 to 1.28 mg/mL). Also, Tg showed bactericide properties against SP (MBC = 2.56 mg/mL), PG (MBC = 2.56 mg/mL), FN (MBC = 10.24 mg/mL), PN (MBC = 5.12 mg/mL), and PI (MBC = 2.56 mg/mL). Although 5-CQA has previously shown activity against Streptococcus mutans, in the present study, it showed no activity against all tested microorganisms. C. canephora extract only showed antibacterial activity against cariogenic microorganisms, not presenting action against periodontal pathogens. It was concluded that trigonelline presented the best effect against all pathogens tested, therefore coffee extracts with higher trigonelline content should be tested against these specific pathogens.
Auto-ecologia de Hypsiboas albopunctatus (Anura, Hylidae) em área de Cerrado no sudeste do Brasil
Muniz, Keni P. R.;Giaretta, Ariovaldo A.;Silva, Wagner R.;Facure, Kátia G.;
Iheringia. Série Zoologia , 2008, DOI: 10.1590/S0073-47212008000200014
Abstract: herein we present new data on the breeding activity of the neotropical treefrog h. albopunctatus. data was collected in the municipality of uberlandia, minas gerais state, brazil. behavioral events were observed focally. we determined the pattern of spatial distribution of the tadpoles. we compared abundance of tadpoles in lakes and swamps and correlated it with variation in depth, amount of vegetable substratum and number of arthropods through a principal component analysis. we tested the palatability of eggs and tadpoles for two species of teleosts. males vocalized in almost all months of the year. males were smaller than the females and presented one spine in each prepolex. amplexus was alternated between axillary and tympanic types. clutches averaged 769 eggs and were laid floating in a single layer. tadpole coloration changed ontogenetically from black to tan. eggs were not consumed by the two tested species of teleosts, but the tadpoles yes. tadpoles had an aggregated distribution in their habitats. the swamps presented larger number and mass of tadpoles. only in the lakes there was a positive correlation between the abundance of tadpoles and depth, amount of plant substratum and arthropods. the almost continuous reproduction of h. albopunctatus along the year is a rare behavior among frogs of southeastern brazil. tadpoles were more abundant in the swampy probably due to absence of predators such as teleosts. unpalatable eggs and the use of refuges by the tadpoles may be the mechanisms allowing reproduction of h. albopunctatus in habitats with predatory teleosts.
Exame citológico do líquido céfalo-raquidiano no diagnóstico de neoplasias primitivas ou metastáticas do sistema nervoso: a propósito de seis casos
Moraes-Rêgo, Sydney F. de;Moraes-Rêgo, Kátia G. de;
Arquivos de Neuro-Psiquiatria , 1986, DOI: 10.1590/S0004-282X1986000200008
Abstract: the authors report 6 cases of cerebrospinal fluid (csf) examinations in which malignant cells were found. in 5 cases the finding was incidental: medulloblastoma (case 1); malignant melanoma (case 2); adenocarcinoma (case 3); meningitis carcinomatosa (case 4) and neuroleukaemia (case 5). in only one case neuroleukaemia was suspected before the study of the csf (case 6). the unexpected occurrence of malignant cells in the csf demands the pathologist to. be well acquainted with tumor cell cytology, in order to identify them providing so useful information that can decidedly influence subsequent diagnostic and therapeutic procedures. the cell collection technic developed in the authors' laboratory was considered adequate, because both inflammatory and malignant cells were securely identified. its principle is to obtain thin air-dried smears that dry almost instantaneously on slides, in order the celular structure be preserved. after centrifuging about 5-8ml of csf the tube is inverted so as to pour off the whole of the supernatant fluid. it is kept inverted with the operator's left hand, so that no drop of fluid can run back on to the cells. with his right hand the operator touches the bottom of the inverted tube with a pasteur micropipette preciously made by distending a microhematocrit tube under the flame of a bunsen burner and attached with adhesive tape to the handle of a wire loop 2mmin diameter. one little drop of the cell suspension is blown with an hematologic suction tube on a slide and spread out with the loop in the maner of a comb, taking care not to scratch over the same place twice, as it dries almost instantaneously. only a square centimeter or so need be covered. the smear is stained with giemsa or leishman stain.
Lignolytic enzymes produced by Trametes villosa ccb176 under different culture conditions
Yamanaka, Renata;Soares, Clarissa F.;Matheus, Dácio R.;Machado, Kátia M.G.;
Brazilian Journal of Microbiology , 2008, DOI: 10.1590/S1517-83822008000100019
Abstract: the expression of the enzymatic system produced by basidiomycetous fungi, which is involved in the degradation of xenobiotics, mainly depends on culture conditions, especially of the culture medium composition. trametes villosa is a strain with a proven biotechnological potential for the degradation of organochlorine compounds and for the decolorization of textile dyes. the influence of glucose concentration, addition of a vegetable oil-surfactant emulsion, nature of the surfactant and the presence of manganese and copper on the growth, ph and production of laccase, total peroxidase and manganese-dependent peroxidase activities were evaluated. in general, acidification of the medium was observed, with the ph reaching a value close to 3.5 within the first days of growth. laccase was the main activity detected under the different conditions and was produced throughout the culture period of the fungus, irrespective of the growth phase. supplementation of the medium with vegetable oil emulsified with a surfactant induced manganese-dependent peroxidase activity in t. villosa. higher specific yields of laccase activity were obtained with the addition of copper.
Ligninolytic enzymes production and Remazol brilliant blue R decolorization by tropical brazilian basidiomycetes fungi
Machado, Kátia M. G.;Matheus, Dácio R.;Bononi, Vera L. R.;
Brazilian Journal of Microbiology , 2005, DOI: 10.1590/S1517-83822005000300008
Abstract: remazol brilliant blue r (rbbr) dye was used as substrate to evaluate ligninolytic activity in 125 basidiomycetous fungi isolated from tropical ecosystems. the extracellular rbbr decolorizing activity produced when selected fungi were grown in solid media and in soil contaminated with organochlorines was also evaluated. a total of 106 fungi decolorized the rbbr during the growth in malt extract agar (mea, 2%); 96 fungi showed a mycelia growth and decolorization activity stronger than the p. chrysosporium used as reference. extracellular extracts of 35 selected fungi grown on solid medium with sugar cane bagasse (bgs) were evaluated for rbbr decolorization and peroxidase activity. all fungi showed peroxidase activities, but 5 of those were unable to decolorize the rbbr. different patterns of ligninolytic enzymes were detected in 12 fungi extracts. mn-dependent peroxidase (mnp) was produced by peniophora cinerea, psilocybe castanella, three strains of trametes villosa, t. versicolor, melanoporia nigra and trichaptum byssogenum. all 12 fungi had laccase activity. trogia buccinalis showed the highest rbbr decolorization and did not produce mnp activity. rbbr decolorization without mnp production was also observed for three strains of lentinum tested. higher levels of peroxidase and laccase cannot be related to high rbbr decolorization. rbbr decolorization by extracellular extract was also detected during the growth of p. castanella, l. crinitus, p. cinerea and two strains of t. villosa in pentachlorophenol- and hexachlorobenzene-contaminated soils. these fungi showed higher rbbr decolorization when grown in the presence of organochlorine compounds than when in non contaminated soil.
Emiss?es otoacústicas evocadas - produto de distor??o em neonatos audiologicamente normais
Raineri, Gláucia G.;Coube, Carmen Z. V.;Costa Filho, Orozimbo A.;Alvarenga, Kátia F.;
Revista Brasileira de Otorrinolaringologia , 2001, DOI: 10.1590/S0034-72992001000500007
Abstract: introduction: distortion product otoacoustic emissions (dpoae) researches on neonates shed a new light into early diagnosis of sensorial hearing losses. study design: prospective results clinical not randomized. aim: the purpose of the present study was to typify dpoae in 20 normal hearing neonates of both sex, according to occurrence, amplitude and duration of test, through dp-gram and utilizing ilo 92 oae system-otodynamics analyzer. results: seventeen out of twenty neonates who volunteered for the research were evaluated, totaling 33 ears. dpoae occurred in 57.5% in 1 khz; 93.9% in 1.5 khz and 3 khz; 96.9% in 2 khz and 100% in 4 khz and 6 khz. conclusion: the dpoae average amplitude fluctuated from 9.9 to 20.3 db spl. the average duration of the test was 82 seconds.
Psychometric properties of the Brazilian Portuguese version of the Obsessive-Compulsive Inventory: Revised (OCI-R)
Souza, Fernanda P.;Foa, Edna B.;Meyer, Elisabeth;Niederauer, Kátia G.;Cordioli, Aristides V.;
Revista Brasileira de Psiquiatria , 2011, DOI: 10.1590/S1516-44462011005000002
Abstract: objective: the present study was designed to evaluate the psychometric properties of the brazilian portuguese version of the obsessive-compulsive inventory - revised. method: the obsessive-compulsive inventory - revised was administered toa total of 260 participants: a clinical sample of 130 patients with anxiety disorders (64 with a diagnosis of obsessive-compulsive disorder patients, 33 diagnosed with social phobia, and 33 with panic disorder) and a sample of 130 non-clinical subjects. results: the findings indicate that the obsessive-compulsive inventory - revised is a valid measure for identifying and assessing the severity of the six symptom subtypes in obsessive-compulsive disorder.the original factor structure of the instrument was replicated in an exploratory factor analysis. test-retest reliability was examined using data from 64 obsessive-compulsive disorder patients who completed the inventory on two different occasions. in each sample, the overall and subscale scores showed moderate to good internal consistency, good convergent and divergent validity, and sensitivity to changes resulting from cognitive-behavioral group therapy changes. conclusion: our findings indicate that the brazilian portuguese version of the obsessive-compulsive inventory - revised retains the psychometric properties of its original version and the spanish, german and iceland versions.
Psychometric properties of the Brazilian Portuguese version of the Obsessive-Compulsive Inventory - Revised (OCI-R)
Souza, Fernanda P.;Foa, Edna B.;Meyer, Elisabeth;Niederauer, Kátia G.;Cordioli, Aristides V.;
Revista Brasileira de Psiquiatria , 2011, DOI: 10.1590/S1516-44462011000200008
Abstract: objective: the present study was designed to evaluate the psychometric properties of the brazilian portuguese version of the obsessive-compulsive inventory - revised. method: the obsessive-compulsive inventory - revised was administered to a total of 260 participants: a clinical sample of 130 patients with anxiety disorders (64 with a diagnosis of obsessive-compulsive disorder patients, 33 diagnosed with social phobia, and 33 with panic disorder) and a sample of 130 non-clinical subjects. results: the findings indicate that the obsessive-compulsive inventory - revised is a valid measure for identifying and assessing the severity of the six symptom subtypes in obsessive-compulsive disorder. the original factor structure of the instrument was replicated in an exploratory factor analysis. test-retest reliability was examined using data from 64 obsessive-compulsive disorder patients who completed the inventory on two different occasions. in each sample, the overall and subscale scores showed moderate to good internal consistency, good convergent and divergent validity, and sensitivity to changes resulting from cognitive-behavioral group therapy. conclusion: our findings indicate that the brazilian portuguese version of the obsessive-compulsive inventory - revised retains the psychometric properties of its original version and the spanish, german and icelandic versions.
Grau de percep??o e inc?modo quanto à condi??o facial em indivíduos com paralisia facial periférica na fase de seqüelas
Freitas, Kátia Cristina Silva de;Gómez, Maria Valéria Goffi;
Revista da Sociedade Brasileira de Fonoaudiologia , 2008, DOI: 10.1590/S1516-80342008000200004
Abstract: purpose: to correlate the self-evaluation of patients with facial paralysis regarding their facial condition, the level of sequelae discomfort and the negative consequences in daily activities, with the results found in clinical assessment. methods: twenty-nine subjects of both genders, with average age of 46 years and an average of 5.9 therapy sessions participated in this study. a clinical evaluation of facial symmetry and movement was carried out, verifying the presence of synkinesis and contractures using a facial grading system proposed by a standardized and published instrument. moreover, an interview with closed questions was carried out, in order to measure the patient's opinion regarding how his own face influences his professional and social activities. results: there was an accordance regarding the patient's self evaluation and the clinical assessment (p=0,0029), but this correlation was not found in patients with less than three sessions of the speech therapy. no significant correlation was found between the degree of synkinesis/contracture and the level of discomfort reported by the patient. furthermore, the negative consequences in professional and social activities were not associated to the degree of facial paralysis, synkinesis or contracture. however, there was a weak correlation tending to significance (r=-0,3250/p=0,085) when the self evaluation was compared to the reported negative consequences. conclusions: the patient's self perception of the facial condition is not always in agreement with the professional's assessment, although this agreement increases in patients with longer intervention periods. on the other hand, the impact of the facial condition in the patient's life does not depend on the degree of sequelae.
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