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CARACTERIZA O MORFOLóGICA DE PROGêNIES NATIVAS DE GUARIROBA (Syagrus oleracea Becc.) NO ESTADO DE GOIáS MORPHOLOGIC CHARACTERIZATION OF NATIVE PROGENIES OF Syagrus oleraceae (Becc.) IN THE GOIáS STATE
Adriano Stephan Nascente
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v33i2.2365
Abstract: O objetivo deste trabalho foi caracterizar morfologicamente as progênies de uma popula o de guariroba (Syagrus oleracea) oriunda de 106 municípios do Estado de Goiás. A média geral das progênies foi de seis folhas vivas/planta e 83% das plantas apresentaram entre duas e sete folhas vivas. A média geral do comprimento da circunferência da estipe, a 10 cm do solo, foi 43 cm e a altura média da estipe foi 203 cm. A popula o apresentou grande variabilidade com rela o às características consideradas. PALAVRAS-CHAVE: Palmeira; palmito amargo; cerrado; planta nativa. The objective of this work was to characterize the population of Syagrus oleracea collected in 106 counties in Goias State. Plants showed, in average, six living leaves per plant and 83% of plants had between two and seven living leaves. The average of perimeter of the stem circumference, at 10cm above ground was 43 cm and the stem height had 203 cm. The population showed high variability regarding wit the evaluated characteristics. KEY-WORDS: Palm tree; bitter core palm; brazilian savanna; native plant.
Estabelecimento do ponto de corte da troponina I como marcador de infarto do miocárdio em cirurgia de revasculariza o miocárdica =Serum concentrations of Troponin I in the detection of acute myocardial infarction in coronary artery bypass grafting
Nascente, Rafael B. et al.
Scientia Medica , 2005,
Abstract: Objetivo: Estabelecer o ponto de corte da troponina I como marcador de infarto miocárdico perioperatório de CRM. Material e métodos: Foram analisados 147 pacientes submetidos a cirurgia de revasculariza o miocárdica (CRM) de janeiro a dezembro de 2002 Hospital S o Lucas da PUCRS. A dosagem de troponina I (valor de referência < 0,5 ng/ml) foi realizada por quimioluminiscência no pré-operatório, 6, 12 e 24 horas após admiss o na unidade de cuidados pósoperatório. Consideramos como infarto o surgimento de nova onda Q ou bloqueio de ramo esquerdo no ECG com aumento de CK = MB superior a 3 vezes o limite de referência ou aumento superior a 8 vezes sem altera o eletrocardiográfica. Resultados: Nesta amostra, 18 pacientes tiveram infarto (12,24%). A média do nível de troponina I no pós-operatório nos pacientes com infarto foi 12,7 ± 13,7; 57,2 ± 31,7 e 45 ± 32,8 ng/ml na 6a, 12a e 24a horas, respectivamente, comparado a 7,6 ± 11,4; 12,0 ± 18,7 e 8,4 ± 19,9 ng/ml nos demais pacientes. Houve diferen a estatisticamente significativa entre os valores de troponina I nos pacientes com e sem infarto na 12a e 24a h. Como os valores de troponina I n o apresentavam uma distribui o normal confeccionou- se uma curva ROC para determina o do melhor nível de sensibilidade e especificidade para os valores encontrados. Nos pacientes que apresentaram os critérios para IAM os valores de troponina I com maior sensibilidade e especificidade encontravam-se na 12a hora, como determinado pela curva ROC, tendo uma acurácia de 89%. Utilizando-se a dosagem da 12a hora o nível de troponina I que apresentou o melhor perfil de sensibilidade e especificidade foi de 9,15 ng/ml (OR36, IC 95% = 4,7-283; p < 0,0001), com valores de 94,4 e 68,2% respectivamente. Conclus o: A determina o da troponina I na 12a hora após o desclampeamento da aorta com valores de 9,15 ng/ml obteve, em nosso estudo, a melhor rela o sensibilidade e especificidade para o diagnóstico de IAM. Entretanto se faz necessário a realiza o de outros estudos que confirmem ou validem os pontos de corte para a troponina I para sua aplicabilidade clínica. Background: Despite modern intraoperative myocardial protection, 5 to 15 percent of patients undergoing coronary artery bypass grafting (CABG) undergo to a perioperative myocardial infarction (MI). The diagnosis of MI after cardiac surgery is difficult because of the nonspecific ST-T wave abnormalities on EKG and the usual elevation of creatine kinase (CK) levels postoperatively. Also, experience with troponin I (TnI), a more sensitive serum marker of cardiac injury, is limi
Cover crops and herbicide timing management on soybean yield under no-tillage system
Nascente, Adriano Stephan;Crusciol, Carlos Alexandre Costa;
Pesquisa Agropecuária Brasileira , 2012, DOI: 10.1590/S0100-204X2012000200006
Abstract: the objective of this work was to evaluate the effect of cover crops and timing of pre-emergence herbicide applications on soybean yield under no-tillage system. the experiment consisted of four cover crops (panicum maximum, urochloa ruziziensis, u. brizantha, and pearl millet) and fallow, in addition to four herbicide timings (30, 20, 10, and 0 days before soybean sowing), under no-tillage system (nts), and of two control treatments under conventional tillage system (cts). the experimental design was a completely randomized block, in a split-plot arrangement, with three replicates. soybean under fallow, p. maximum, u. ruziziensis, u. brizantha, and pearl millet in the nts and soybean under u. brizantha in the cts did not differ significantly regarding yield. soybean under fallow in the cts significantly reduced yield when compared to the other treatments. the amount of straw on soil surface did not significantly affect soybean yield. chemical management of p. maximum and u. brizantha near the soybean sowing date causes significant damage in soybean yield. however, herbicide timing in fallow, u. ruziziensis, and pearl millet does not affect soybean yield.
Interferência das plantas daninhas na cultura do tomate para processamento
Nascente, Adriano Stephan;Pereira, Welington;Medeiros, Maria Alice;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000300020
Abstract: weed control efficiency depends on the information about its interference on the crops. the interference of weed on tomato plants of a processing variety, transplanted directly into the field was evaluated. the field experiment was carried out, in a randomized block design with three replications, at embrapa hortali?as in brasília, brazil. plots were laid out with increasing periods of time in the presence or absence of weeds. in the first case, plots remained under weed interference from seedling stage until the following periods (days) of the tomato life cycle: 1-28, 1-35, 1-49, 1-63, 1-77 and 1-91(whole cycle, harvest). after these periods the weeds grew freely until harvesting time. in the second case, plots were weeded from seedling stage until the previously described periods. after these periods weeds were removed by hand through the rest of the tomato cycle. among 24 of the most frequent weed species, bidens pilosa, brachiaria plantaginea, nicandra physaloides and oxalis latifolia presented higher dry matter accumulation. tomato production was reduced by 75.5% and the critical period of interference occurred from the 33th to the 76th day after transplanting.
Soybean growth and yield under cover crops Análise de crescimento e produtividade de gr os de soja sobre plantas de cobertura
Priscila de Oliveira,Adriano Stephan Nascente,Jo?o Kluthcouski
Revista Ceres , 2013,
Abstract: The use of cover crops in no-tillage systems can provide better conditions for the development of soybean plants with positive effects on grain yield and growth analysis techniques allow researchers to characterize and understand the behavior of soybean plants under different straw covers. Thus, the aim of this study was to characterize, using growth analysis, yield components and agronomic performance of soybean under common bean, Brachiaria brizantha and pearl millet straws. The experiment was performed on a soil under cerrado in the municipality of Santo Ant nio de Goiás, GO. The experiment was arranged in a randomized complete block design with three treatments (cover crops) and five replications. Soybean grain yield was lower in the B. brizantha straw treatment (3,708 kg ha-1) than both in the pearl millet (4.772 kg ha-1) and common bean straw treatments (5,200 kg ha-1). The soybean growth analysis in B. brizantha, pearl millet and common bean allowed characterizing the variation in the production of dry matter of leaves, stems, pods and total and leaf area index that provided different grain yields. The cover crop directly affects the soybean grain yield. O uso de plantas de cobertura no sistema plantio direto pode proporcionar melhores condi es para o desenvolvimento da cultura da soja com reflexos positivos na produtividade de gr os, e o uso da técnica de análise de crescimento permitirá caracterizar e entender o comportamento das plantas de soja sobre diferentes palhadas. Dessa forma, o objetivo deste trabalho foi caracterizar, por meio da análise de crescimento, os componentes e o desempenho agron mico da soja sobre as palhadas de feij o-comum, Brachiaria brizantha e milheto. O experimento foi conduzido em solo de cerrado no município de Santo Ant nio de Goiás, Estado de Goiás. O delineamento experimental foi o de blocos completos casualizados, com três tratamentos (palhadas de cobertura) e cinco repeti es. A produtividade de gr os de soja foi menor sobre palhada de B. brizantha (3,708 kg ha-1) do que sobre as palhadas de milheto (4,772 kg ha-1) e feij o-comum (5,200 kg ha-1). A avalia o da análise de crescimento das plantas de soja sobre as palhadas de B. brizantha, milheto e feij o-comum possibilitou caracterizar a varia o na produ o de matéria seca de folhas, hastes, vagens e total e no IAF (índice de área foliar), que proporcionou as diferentes produtividades de gr os da soja. A planta de cobertura afeta diretamente a produtividade de gr os de soja.
Preparation of Bioactive Titanium Surfaces via Fluoride and Fibronectin Retention
Carlos Nelson Elias,Patricia Abdo Gravina,Costa e Silva Filho,Pedro Augusto de Paula Nascente
International Journal of Biomaterials , 2012, DOI: 10.1155/2012/290179
Abstract: Statement of Problem. The chemical or topographic modification of the dental implant surface can affect bone healing, promote accelerated osteogenesis, and increase bone-implant contact and bonding strength. Objective. In this work, the effects of dental implant surface treatment and fibronectin adsorption on the adhesion of osteoblasts were analyzed. Materials and Methods. Two titanium dental implants (Porous-acid etching and PorousNano-acid etching followed by fluoride ion modification) were characterized by high-resolution scanning electron microscopy, atomic force microscopy, and X-ray diffraction before and after the incorporation of human plasma fibronectin (FN). The objective was to investigate the biofunctionalization of these surfaces and examine their effects on the interaction with osteoblastic cells. Results. The evaluation techniques used showed that the Porous and PorousNano implants have similar microstructural characteristics. Spectrophotometry demonstrated similar levels of fibronectin adsorption on both surfaces (80%). The association indexes of osteoblastic cells in FN-treated samples were significantly higher than those in samples without FN. The radioactivity values associated with the same samples, expressed as counts per minute (cpm), suggested that FN incorporation is an important determinant of the in vitro cytocompatibility of the surfaces. Conclusion. The preparation of bioactive titanium surfaces via fluoride and FN retention proved to be a useful treatment to optimize and to accelerate the osseointegration process for dental implants. 1. Introduction The phenomenon of endosseous implant osseointegration, conceptualized by Branemark as the “direct, structural and functional link between the living and orderly bone and the surface of an implant subjected to functional loads” [1], is fundamental to the success of dental implant applications. Commercially pure titanium (cp Ti) is the main material used for this purpose because it has good biocompatibility and adequate mechanical strength. Ti exposed to oxidizing agents spontaneously forms a 10-100?? thick titanium oxide layer. This layer is stable in most media, especially under physiological conditions, and, surgically, it shows no change in thickness or corrosion. This ensures implant-bone tissue interaction and osseointegration [2]. The reactions of the tissue host with the biomaterial are determined by the surface properties of the biomaterial. The dental implant surface treatment should induce the differentiation of the desired cells [3]. Surface treatments of available
Chlamydia trachomatis and human papillomavirus coinfection: association with p16INK4a and Ki67 expression in biopsies of patients with pre-neoplastic and neoplastic lesions
Calil, Luciane Noal;Igansi, Cristine Nascente;Meurer, Luise;Edelweiss, Maria Isabel Albano;Bozzetti, Mary Clarisse;
Brazilian Journal of Infectious Diseases , 2011, DOI: 10.1590/S1413-86702011000200006
Abstract: the objective of this study was to identify the frequency of coinfection by human papillomavirus (hpv) and chlamydia trachomatis (ct) in cervical lesions and relate it with immunohistochemical expression of p16ink4a and ki67, both oncogenicity markers. a cross-sectional study with 86 women from primary care units in southern brazil was conducted. cervical swabs were collected for hpv-dna and ct-dna detection, through the polymerase chain reaction technique (pcr). the immunohistochemical analysis was performed on biopsy cervical tissue material to identify the expression of p16ink4a and ki67 cell cycle markers. about 83 % were positive for hpv-dna and 19% had coinfection with ct-dna. among coinfected women, 56% expressed p16ink4a. there was a statistically significant association between the histological grade of the lesion and ki67 expression. all high-grade lesions, 50% of low-grade lesions and 31% of negative biopsies expressed ki67 (p = 0.004). a total of 37% of coinfected women expressed both markers. in conclusion, although more than half of the coinfected patients have expressed p16ink4a and more than one third have expressed both markers, these results suggest no association between those variables. however, other studies involving larger samples are necessary to corroborate such findings.
DROGAS ANTIFúNGICAS PARA PEQUENOS E GRANDES ANIMAIS
Nobre, Márcia de Oliveira;Nascente, Patrícia da Silva;Meireles, Mario Carlos;Ferreiro, Laerte;
Ciência Rural , 2002, DOI: 10.1590/S0103-84782002000100029
Abstract: the antifungal drugs are classified in classic and current chemical agents and in antibiotics. the chemists classic agents are those medicines that present in a general way reduced action spectrum against fungi, having a fungistatic effect in an indirect way when modifying the local conditions, as for instance the iodine, acids fat and derived, acid salicilic, tolnaftate and tolciclate. the current chemical agents are represented by imidazole and triazole, flucytosine and allylamines and the antibiotics represented by the polyene (amphotericin b, nystatin and natamycin) and the griseofulvin. the discretion of each antifungal drug will be presented in the work.
Análise de crescimento e produtividade de cultivares de arroz de terras altas dos tipos tradicional, intermediário e moderno
Alvarez, Rita de Cassia Felix;Crusciol, Carlos Alexandre Costa;Nascente, Adriano Stephan;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000400008
Abstract: the growth analysis allows the characterization and understanding of the upland rice cultivars development. this study aimed at characterizing, by using the growth analysis, the physiological components and agronomic performance, as well as the differences among traditional, intermediate and modern upland rice cultivars. the experiment was conducted under upland rice conditions, favored by the use of supplementary irrigation. the experimental design was randomized blocks, with three treatments consisting of traditional (caiapó), modern (maravilha) and intermediate (brs primavera) cultivars and eight replications. the leaf area index (lai), instantaneous growth rate (igr), relative growth rate (rgr), net assimilation rate (nar) and specific leaf area (sla), as well as grain yield and yield components, were evaluated. the intermediate and traditional cultivars presented the highest total dry matter accumulation rate, while the traditional and modern ones showed the highest lai. the intermediate cultivar presented the highest igr, rgr, nar and sla levels, as well as the highest grain yield, as a consequence of the higher spikelet fertility and 1,000 grain mass.
Aduba??o de cultivares de feijoeiro comum em várzeas tropicais
Nascente, Adriano Stephan;Kluthcouski, Jo?o;Crusciol, Carlos Alexandre Costa;Cobucci, Tarcísio;Oliveira, Priscila de;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000400003
Abstract: the bean crop has a high economic and social importance for the brazilian population. however, some aspects should be improved in its cropping system, such as the plants fertilization management. the common bean sub-irrigation, in the rice intercropping, has been a viable alternative for grain yield, in the lowland ecosystem. however, there are just a few studies on fertilization in tropical lowland conditions. thus, this study aimed at evaluating the yield of common bean cultivars grown under tropical lowland conditions and sub-irrigation, in lagoa da confus?o, tocantins state, brazil, in the winter of 2008, by using different fertilizers sources, doses and splittings. the experimental design was randomized blocks, in a factorial scheme (cultivars x forms of fertilization), with cultivars divided into groups (black, carioca and special). the common bean yield was higher with the early nitrogen fertilization, and even higher when it was combined with potassium in topdressing fertilization, being the ouro negro (black group), pitoco (carioca group) and cranberry and brs embaixador (special group) the cultivars that reached the highest grain yields. when the recommended fertilization was used, ouro negro (black group), carioca (carioca group) and jalo precoce and brs embaixador (special group) reached the highest grain yield, for each grain group. yield was higher for the black group cultivars, when compared to the carioca and special groups.
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