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Search Results: 1 - 10 of 43017 matches for " Costa Vanessa Alves "
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Aspectos fisiológicos, anat?micos e ultra-estruturais do rizoma de Costus arabicus L. (Costaceae) sob condi??es de déficit hídrico
Costa, Vanessa Pires da;Hayashi, Adriana Hissae;Carvalho, Maria Angela Machado de;Silva, Emerson Alves da;
Hoehnea , 2012, DOI: 10.1590/S2236-89062012000100007
Abstract: costus arabicus l. is an herbaceous species, native to the forest that accumulates starch in the rhizome as the main reserve carbohydrate. water stress is one the most important environmental factor that regulates plant growth and development, leading to changes in physiological, biochemical and anatomical traits. the aim of this study was to evaluate the effect of water deficit on the anatomy, carbohydrate concentration and ultrastructure of starch grains of the rhizome of costus arabicus l. through the following water regimes: plants irrigated daily and every seven (7d) and 15 days (15d). anatomical and ultrastructural traits of the rhizome, relative water content in leaves (rwc), leaf water potential (ψw), osmotic potential of the rhizome (ψo), total soluble sugars (tss), reducing sugars (rs) and starch of the rhizome were evaluated. we observed significant reductions in ψw and ψs in 15d plants, but with small variations in the rwc. the anatomical analysis showed that the rhizome is covered by epidermis or stratified cork and there is a delimitation between the cortical and vascular regions. we detected the presence of numerous starch grains and idioblasts with phenolic contents in the parenchyma of the two regions. changes in the anatomy of the rhizomes were only observed in plants irrigated every 15 days, in which cells of covering tissue and the outer cortical layers became more flattened and sinuous walls; however, no ultrastructural differences were observed on the starch grains. the water deficit imposed was sufficient to generate physiological, biochemical and anatomical changes in plants of c. arabicus l. such alterations suggest the occurence of an avoidance mechanism and that anatomical changes were dependent of the intensity and duration of water deficit.
Virulence of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) for the control of Diabrotica speciosa germar (coleoptera: chrysomelidae)
Santos, Viviane;Moino Junior, Alcides;Andaló, Vanessa;Moreira, Camila Costa;Olinda, Ricardo Alves de;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011000600015
Abstract: entomopathogenic nematodes (epns) are used in biological control of soil insects and show promise in the control of d. speciosa. the objective of this work was to evaluate the potential of native and exotic entomopathogenic nematode isolates in the control of d. speciosa under laboratory and greenhouse conditions. results showed that all of epns caused larval mortality. the most virulent were heterorhabditis sp. rsc01 (94%), steinernema glaseri (84%), heterorhabditis sp. jpm04 (82%) and heterorhabditis amazonensis rsc05 (78%). there was no effect of the heterorhabditis sp. rsc01 and s. glaseri isolates on eggs. the maximum mortality of d. speciosa larvae by heterorhabditis sp. rsc01 was observed at a concentration of 300 ij/ insect, while by s. glaseri observed the highest mortality at the concentration of 200 ij/ insect. the heterorhabditis sp. rsc01 isolate caused over 80% pupal mortality at a concentration of 250 ij/insect. the virulence of heterorhabditis sp. rsc01 and s. glaseri was affected by temperature. the heterorhabditis sp. rsc01 isolate caused reduction in larva survival under greenhouse conditions at all of the tested concentrations and there was no difference in mortality among different concentrations of infectid juveniles.
Variáveis qualitativas da pulveriza??o em feij?o, Bidens pilosa E Brachiaria plantaginea
Rodrigues, Andreia Cristina Peres;Martins, Dagoberto;Costa, Neumarcio Vilanova da;Cardoso, Leonildo Alves;Domingos, Vanessa David;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000300024
Abstract: the objective of the present study was to evaluate the deposition quality of spray solution in common bean plants (phaseolus vulgaris l.), bidens pilosa l. and brachiaria plantaginea (link) hitchc., present in the crop row and spacing row. brilliant blue fdc - 1 was used as a tracer solution (500 ppm). five nozzles were used: flat fan nozzle (xr 110015 vs and xr 11002 vs), double flat fan nozzle (tj60 11002 vs) and cone nozzle (tx-6 vs and tx-8 vs), and two application volumes: 150 and 200 l ha-1. a randomized blocks design was used, with four replications. 25 plants were sampled for replication in each plot, common beans as well as weeds in crop row and spacing row. after the application, the plants were collected and washed in distilled water for tracer quantification in spectrophotometer. the data adjusted to the regression curve according to the gompertz model. the results showed that, for the common bean plants, xr 110015 and tj60 nozzles had provided the most uniform depositions in 150 and 200 l ha-1 application volume, respectively; the nozzle in the volume of 150 l ha-1 had a more uniform distribution for both the species of harmful plants present in the crop line; for the weeds present in the crop row in a volume of 150 l ha-1 the best performances were presented by the xr 110015 nozzle for b. pilosa and the tj60 nozzle for b. plantaginea. for the volume of 200 l ha-1 , the tx-8 nozzle presented the best performance for both species.
Spatial analysis of homicides in South East Brazil: An assessment of differential risk between men, women, and the youth / Analyse des homicides dans la région du Sud-Est du Brésil : une évaluation des risques différentiels chez les hommes, les femmes et les jeunes
Diniz Alves Alexandre Magno,Chaves Borges Felipe Avila,da Costa Gustave Henrique,Sena Brandao Vanessa
Rivista di Criminologia, Vittimologia e Sicurezza , 2012,
Abstract: Cette étude se base sur une perspective géographique et analyse l’évolution dans l’espace et dans le temps des taux moyens de morts par homicide dans la région du Sud-Est du Brésil, entre 2001 et 2008, chez les hommes, les femmes, les jeunes entre 15 et 29 ans, et l’ensemble de la population. Les résultats mettent en évidence que ce phénomène touche de manière asymétrique les jeunes hommes, tandis que chez les femmes les taux moyens sont les plus bas. L’analyse dans l’espace a souligné qu’il existe des zones avec des taux d’homicide élevés et stabilisés dans le temps, comme les régions métropolitaines de Rio de Janeiro et Vitória. En revanche, l’étude a montré qu’entre les régions métropolitaines de Belo Horizonte (RMBH), Campinas et San Paolo, les dynamiques sont différentes. This study is based on a geographical perspective and explores the spatial and temporal evolution of average homicide rates in Southeast Brazil, between 2001 and 2008 for different subpopulations (male, female, youth, and total population). Results show that this phenomenon affects asymmetrically young males, while women have the lowest average rates. Spatial analysis pinpoints consolidated areas with high homicide rates, such as the metropolitan areas of Rio de Janeiro and Vitoria. On the other hand, different dynamics can be observed among the metropolitan areas of Belo Horizonte (BHMA), Campinas and Sao Paulo.
Modelo experimental de esplenectomia laparoscópica em ratos
Costa, Vanessa Alves;Oliveira, Fabrício Mascarenhas de;Oliveira Jr, Lúcio Couto de;Carreiro, Mario Castro;Guimar?es, Pedro;
Acta Cirurgica Brasileira , 2003, DOI: 10.1590/S0102-86502003000600013
Abstract: purpose: to describe a model of laparoscopic esplenectomy in rats. methods: thirty-five male rats rattus norvegicus albinus wistar weighing 250 +/- 50 g were used in this study. the animals were insufflated with pco2 of 7 mmhg through a veress needle. after the pneumoperitoneum, two 5 mm and a 11 mm trocars were passed through the abdominal wall, so as to form a triangular geometrical figure. the spleen was approached directly by dissection of the gastrosplenic ligament. hilar vessels were blunty dissected close to the spleen using maryland and hook. a bag was then introduced into the abdominal cavity and the spleen slipped inside. the organ could be removed through a port of site. results: one animal (2,86%) died at the anaesthetic induction. after an eight-day observation period, 30 animals survived (85,7%) and four (11,42%) died immediately after the surgery. in relation to complications, nine rats showed adhesions in left upper quadrant. conclusions: this laparoscopic splenectomy is feasible and it is an excellent training model. besides low cost and easy availability, the rat model requires less financial efforts.
Modelo experimental de hepatectomia parcial laparoscópica em ratos
Oliveira, Fabrício Mascarenhas de;Oliveira Jr, Lúcio Couto de;Costa, Vanessa Alves;Carreiro, Mario Castro;Guimar?es, Pedro;
Acta Cirurgica Brasileira , 2003, DOI: 10.1590/S0102-86502003000300015
Abstract: purpose: to describe a model of laparoscopic partial hepatectomy in rats. methods: 35 male rats rattus norvegicus albinus wistar weighing 250 +/- 50 g were used in this study. the animals were anaesthetised with ketamin and xilasin and insufflated with pco2 of 7 mmhg through a veress needle. after the pneumoperitoneum, two 5 mm and a 11 mm trocars were passed through the abdominal wall, so as to form a triangular geometrical figure. the ligature of three hepatic lobes (left, median left and median right) was done with endoloop and the electrocoagulation of hemorrhagic spots with the hook. the animals were sacrificed after an eight-day observation period. results: three animals (8,6%) died at the anaesthetic induction. after an eight-day observation period, 30 animals survived (85,7%) and only 2 (5,7%) died immediately after the surgery. in relation to complications, granuloma was observed in 54,3% (n=19). no conversion to open surgery was necessary. conclusion: the model of laparoscopic partial hepatectomy in rats using surgical material similar to that used in humans is doable for surgeons' training and improvement.
Modelo experimental de vasectomia laparoscópica em ratos
Oliveira Jr, Lúcio Couto de;Oliveira, Fabrício Mascarenhas de;Costa, Vanessa Alves;Carreiro, Mario Castro;Guimar?es, Pedro;
Acta Cirurgica Brasileira , 2003, DOI: 10.1590/S0102-86502003000500016
Abstract: purpose: to describe a model of laparoscopic vasectomy in rats. methods: 35 rats rattus norvegicus albinus wistar were used. the animals were anaesthetised and then the pneumoperitoneum was done with pco2 of 7mmhg through a veress needle. after that, a 11 mm trocar and two 5 mm trocars were inserted through the abdominal wall. the forceps used on dissections, cauterisation and section of the ductus deferens and its vessels and the 10mm diameter laparoscope were introduced through the trocars. results: in the course of surgery, two animals (5,74%) presented bleeding which was easily stopped in both cases. one animal died at the anaesthetic induction (2,85%) and another (2,85%) died of an unidentified cause on the fourth observation day. after an eight-day observation period, 33 rats were alive (94,28%). conclusions: the surgical material is the same as that used in humans and all the basic procedures of laparoscopic surgery are applied, which makes it feasible in the training of students, residents and surgeons.
Aproxima??o à subjetividade de enfermeiros com a vida: afetividade e satisfa??o em foco
Alves, Selda Gomes de Sousa;Vasconcelos, Tatiana Cristina;Miranda, Francisco Arnoldo Nunes de;Costa, Tarciana Sampaio;Sobreira, Maura Vanessa Silva;
Escola Anna Nery , 2011, DOI: 10.1590/S1414-81452011000300010
Abstract: it was aimed to analyze aspects of nurses' subjectivity, through indicators of affection and satisfaction with life. this is an exploratory descriptive study of quantitative approach. twenty nurses working in family health strategy, of the municipal district of sousa, pb, brazil, participated in the study and answered to the general health questionnaire (qsg-12). the main results indicated that nurses presented average of 5.73 of positive affections and 1.86 of negative affections. the life satisfaction average was of 4.03. it was concluded that nurses presented satisfactory health level. however, this result should not deny the need for permanent cares of nurses concerning their health, once the care reflects in the professional performance. thus, the ability of taking care of themselves should be acquired and improved from the formation.
Potenciais evocados auditivos do tronco encefálico por condu??o óssea em indivíduos normais
Freitas, Vanessa Sabino de;Alvarenga, Kátia de Freitas;Morettin, Marina;Souza, Elidiane Fugiwara de;Costa Filho, Orozimbo Alves;
Pró-Fono Revista de Atualiza??o Científica , 2006, DOI: 10.1590/S0104-56872006000300012
Abstract: background: bone conduction auditory brainstem responses (abr) in normal hearing individuals. aim: to evaluate the clinical applicability of bone conduction abr, characterizing normality and determining an assessment protocol. method: participants of this study were 22 individuals with normal hearing (20db na), with ages between 20 and 30 years, 14 female and 8 male. all individuals were assessed using air and bone (vibrator positioned on the forehead and mastoid) conduction abr. ep25 equipment, interacoustic; 3a insertion phone; b-71 bone vibrator; click stimulus. results: it was possible to evaluate the bone conduction abr in all individuals. the results demonstrate that the electrophysiological threshold obtained when the vibrator was positioned on the forehead (32.69 ± 5.63 and 32.5 ± 7.07db nhl) was higher than that obtained when the vibrator was positioned on the mastoid (25.00 ± 7.33 and 30.00 ± 5.34db nhl) for both genders respectively. for this reason the vibrator was positioned on the mastoid. the electrophysiological threshold obtained by bone conduction was higher than that obtained by air conduction for both genders and also when all individuals were grouped together. thus it is necessary to use a correction factor, according to the results, of 10db nhl. the latency-intensity values of the v wave in the ipsilateral and contralateral recordings differed statistically according to gender, and should be considered separately. the value of 26.81 ± 6.99db nhl was adopted as being the normal threshold for bone conduction abr. conclusion: it is possible to evaluate bone conduction abr in the clinical environment. these results, when considered along with the air conduction abr, increase the chances of a more precise diagnosis regarding the type of hearing loss.
Análise crítica de três protocolos de triagem auditiva neonatal
Freitas, Vanessa Sabino de;Alvarenga, Kátia de Freitas;Bevilacqua, Maria Cecilia;Martinez, Maria Angelina Nardi;Costa, Orozimbo Alves;
Pró-Fono Revista de Atualiza??o Científica , 2009, DOI: 10.1590/S0104-56872009000300004
Abstract: background: having knowledge about the validity of procedures for newborn hearing screening (nhs) is fundamental, once the purpose of these programs is to identify all newborns with hearing loss at an acceptable cost. aim: to estimate the specificity and the false-positive rate of nhs protocols using transient evoked otoacoustic emissions (teoae) and automated auditory brainstem response (aabr). method: participants were 200 newborns who were submitted to a hearing screening test between march and july 2006. three protocols were analyzed: protocol 1, nhs was carried out in two steps using teoae; protocol 2, nhs was carried out in two steps using aabr; and protocol 3, nhs was carried out in one step, using the two procedures - testing with teoae followed by a retest with aabr for all the newborns who did not pass the teoae testing. results: although there was no statistically significant difference when comparing the referral rates to audiological diagnosis obtained in protocols using teoae and aabr, the protocol using teoae referred four times more newborns. protocol 3 presented the highest referral rate, with a statistically significant difference when compared to protocols 1 and 2. conclusions: the false-positive rate and consequently specificity were better for the protocol using aabr, followed respectively by the protocol using teoae and using both teoae and aabr.
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