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Search Results: 1 - 10 of 521438 matches for " Raquel de L. C.; "
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Aplica??o de quitosana como suporte para a imobiliza??o de enzimas de interesse industrial
Mendes, Adriano A.;Oliveira, Pedro C. de;Castro, Heizir F. de;Giordano, Raquel de L. C.;
Química Nova , 2011, DOI: 10.1590/S0100-40422011000500019
Abstract: chitosan, poly[β-(1-4)-linked-2-amino-2-deoxy-d-glucose], is the n-deacetylated product of chitin which is a major component of arthropod and crustacean shells such as lobsters, crabs, shrimps, and cuttlefishes. in addition, chitosan has many significant biological and chemical properties such as biodegradability, biocompatibility and bioactivity as well as polycationic properties. thus, it has been widely used in many industrial and biomedical applications including wastewater treatment, chromatographic support, carriers for controlled drug delivery and enzyme immobilization. this review is an insight into the exploitation of utilization of chitosan based-supports in different geometrical configurations on the immobilization of enzymes by different protocols for further application in biotransformation reactions.
Mudan?a da flexibilidade do ombro com o destreinamento: um estudo de caso
Ruberti,Lílian de Cássia; Christofoletti,Gustavo; Gon?alves,Raquel; Gobbi,Sebasti?o;
Motricidade , 2008,
Abstract: the aim of this study was to verify the influence of a six-month detraining program on shoulders flexibility, after a period of specific training by means of a neuroprioceptive facilitation technique named as scientific stretching for sport (3s). this research consists of a case report of a 62 year-old subject. first of all, the subject attended a 2-month period of flexibility training, by means of 3s technique. after that, the subject stayed away from the training for a period of six months. the flexibility was measured by goniometer, both at baseline (beginning of the detraining period) and six months after. the results showed decrease in flexibility on all the movements, except for right shoulder extension and medial rotation. a variety of putative mechanisms may explain the flexibility decrement with detraining, such as a reduction in conjuntive extensibility.
Cardiovascular Risk of Community-Dwelling Elderly from a City in Northeastern Brazil: Correlations with Vitamin D and Parathormone  [PDF]
Lídia Ribeiro de Carvalho, Cecília Maria R. G. de Carvalho, Sandra M. L. Ribeiro, Ivone F. de Oliveira C. Nunes, Raquel Galv?o Figueredo, Amanda Marreiro Barbosa, Francisco Erasmo de Oliveira, Dilina do Nascimento Marreiro, Marcos David Figueiredo de Carvalho, José Machado Moita Neto
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.511116
Abstract:

We investigated the cardiovascular disease (CVD) risk of the elderly in a city in northeastern Brazil, and the correlation of this risk with vitamin D and PTH status. We studied 359 elderly, both genders, from Piauí-Teresina-Brazil. Variables investigated: body mass index, waist circumference, systolic and diastolic blood pressure. A subsample (n = 100) was investigated for biochemical analyses: PTH and 25(OH)-vitamin D levels; total, HDL and LDL-cholesterol; and fasting glucose. High blood pressure, abdominal obesity, sedentarism, high total cholesterol, high triacylglycerol levels, as well as low vitamin D levels, were, among the investigated variables, the most prevalent. Visceral adiposity and low vitamin D were found to be more prevalent in women than in men, whilst alcohol intake and smoking were more prevalent in men. The correlation between vitamin D, PTH and the investigated risk variables, under our study conditions, were not significant.

Avalia??es qualitativas e quantitativas de plantas daninhas na cultura da soja submetida aos sistemas de plantio direto e convencional
Pereira, Eduardo de Sá;Velini, Edivaldo D.;Carvalho, Lídia Raquel de;Maimoni-Rodella, Rita C. S.;
Planta Daninha , 2000, DOI: 10.1590/S0100-83582000000200003
Abstract: with the objective to evaluate the effects of different tillage systems and different methods of control on mulch of black oat (avena strigosa) on evolution and control of weeds in soybean crop (cultivar 'iac 14'), a field experiment was carried out in fazenda experimental lageado - unesp botucatu - sp, in 1993/94. the different cultivation systems were no tillage and conventional tillage, and the last cultivation system was made with disk harrow and three tandem disk harrow. the weed control methods were: control (weedy check), pre-emergence herbicides (0,28 kg/ha of metribuzim + 1,29 kg/ha of oryzalin), post-emergence herbicides (0,25 kg/ha of fluacifop-p-butil +0,25 kg/ha of fomesafen) and pre and post-emergence treatments (with the four herbicides in the same rates). glyphosate was applied for weed and black oat elimination before the crop establishment. the experimental design used was a randomized block arranged in split-plots scheme with four replications. the different cultivation systems were applied on plots and the different weed control on sub-plots. in the early stages of crop development, the rain was scarce, limiting crop growth and performance of the preemergence herbicides. the number the weeds/m2 was evaluated at 14, 28 and 35 days after soybean emergency, showing differences between cultivation systems and among different control systems. brachiaria plantaginea and amaranthus viridis were predominant on conventional tillage, and less important on no-tillage system; the most important species in this system was euphorbia heterophylla. on the conventional system, preemergence herbicides were the best control for a. viridis than to b. plantaginea; the control with post-emergence herbicides was unsatisfactory in both tillage systems. on the no-tillage systems the control of e. heterophylla was unsatisfactory in all studied situations. no-tillage systems showed a smaller number of weeds than conventional systems. the germination of weeds was restricted
MuSA: Multivariate Sampling Algorithm for Wireless Sensor Networks
André L. L. Aquino,Orlando S. Junior,Alejandro C. Frery,édler Lins de Albuquerque,Raquel A. F. Mini
Computer Science , 2014, DOI: 10.1109/TC.2012.229
Abstract: A wireless sensor network can be used to collect and process environmental data, which is often of multivariate nature. This work proposes a multivariate sampling algorithm based on component analysis techniques in wireless sensor networks. To improve the sampling, the algorithm uses component analysis techniques to rank the data. Once ranked, the most representative data is retained. Simulation results show that our technique reduces the data keeping its representativeness. In addition, the energy consumption and delay to deliver the data on the network are reduced.
Psicologia e Educa??o no Brasil: uma vis?o da história e possibilidades nessa rela??o
Guzzo, Raquel S. L.;Mezzalira, Adinete S. C.;Moreira, Ana Paula Gomes;Tizzei, Raquel Pondian;Silva Neto, Walter Mariano de Faria;
Psicologia: Teoria e Pesquisa , 2010, DOI: 10.1590/S0102-37722010000500012
Abstract: the present article discusses some historical elements of the relation between psychology and education in brazil, emphasizing its practical and theoretical dimension. that is, it presents school psychology and the foundations that support this practice as well as the resulting intellectual production. at the same time, it discusses the limits and difficulties present in this process over the past 20 years, indicating the importance of the area in the brazilian social-political conjuncture and its future directions.
Ambiente saudável e aprendizagem em cursos da área da saúde: uma realidade possível
Souza C,Denise Raquel; L,Camila Viana; de Paula Tavares C,Maria Beatriz; Costa de Morais Arag?o G,Maria Leonor; Fernandes l,Ronner; Santos A,Maria Dalva;
Avances en Enfermería , 2011,
Abstract: the goal was to identify the students' social representations about the center for health sciences in the context of health, environment and human development. the subjects of this exploratory-descriptive and comparative research were sixty-two nursing and pharmacy students. the instrument and techniques were a semi-structured questionnaire, the free word association and the expressive technique of collage. data collection was performed with the approval of the ethics committee. thirteen nursing students represented the center as disorganized and eight pharmacy students, as a place for learning. students defined it as a second home. some see it as inadequate, confusing, spatially fragmented and organized according to the status of the courses. for both types of students, the lack of resources interferes with the teaching-learning process. the total variance of the data reached 82%. the f1 axis, with 51.9%, includes representations regarding safety, good food and water quality. in the f2 axis, with 30.1%, shows pharmacy student representations regarding the structure of the center, but they are pleased to study at this public university. in the expressive technique of collage eight themes were categorized: nature, organization and human relationships, family and risks, happiness, religion and expectations. we concluded that there is a relationship between knowledge and university education and representations of the environment.
Antimicrobial, Cytotoxic and Antioxidant Activities and Determination of the Total Tannin Content of Bark Extracts Endopleura uchi
Flávio A. S. Politi,Jo?o C. P. de Mello,Ketylin F. Migliato,Andréa L. A. Nepomuceno,Raquel R. D. Moreira,Rosemeire C. L. R. Pietro
International Journal of Molecular Sciences , 2011, DOI: 10.3390/ijms12042757
Abstract: Endopleura uchi is a typical Amazonian tree and its bark is popularly employed in the preparation of teas against myomas, arthritis, influenza, diarrhea and cancer. In this study, the antioxidant activity, cytotoxicity and antimicrobial activity of five different extracts of the bark, selected by their total tannin content, were assessed. The potential antioxidant activity of the extracts was determined by 2.2-diphenyl-1-picrylhydrazyl radical scavenging assay and the values found were very similar among the extracts and to the standards antioxidants used in the tests. Cytotoxicity analysis in mammalian cells indicated that all the tested extracts exhibited IC 50 values higher than the highest concentration used, showing that they do not present a risk when consumed under these conditions. Extract tested against five bacterial strains and one yeast strain did not show satisfactory growth inhibitory activity, and even the extracts that showed some antimicrobial activity were not effective at any dilution to determine the minimum inhibitory concentration. The results may serve as a reference for subsequent works, since such reference values described in the literature for the bark of E. uchi.
Produtividade de crisantemo em fun??o de níveis de irriga??o
Rego, Juliana de L;Viana, Thales Vinícius de A;Azevedo, Benito M de;Araújo, Wellington F;Furlan, Raquel Aparecida;Bastos, Francisco Gleyber C;
Horticultura Brasileira , 2009, DOI: 10.1590/S0102-05362009000100009
Abstract: chrysanthemum (dendranthema grandiflora, tzevelev.) is one of the most important flowers traded both in brazil and in the world. in spite of that, chrysanthemum irrigation management in brazil is characterized by empiricism, therefore deeper studies related to the plant water use are needed. this work aimed to study the effects of irrigation depths on chrysanthemum grown in protected cultivation. the experiment was conducted from august 6 to the october 27 of 2003, in guaramiranga, ceará state, brazil, under a 9 x 30 m protected cultivation structure. the experimental design was completely randomized blocks, with four treatments (irrigation depths corresponding to 50; 75; 100, and 125% of the evaporation of the class "a" evaporation pan, eca), and four replications. the crop cycle lasted for 82 days and the total water amounts applied were: 192.2; 246.4; 300.9, and 355.4 mm for the 50, 75, 100 and 125% of eca treatments, respectively. no significant differences were found in the number of stems per pack, in packages per m2, and even in productivity (table 1). among treatments, the number of stems per package varied from 21 (75, 100 e 125% eca) to 22 (50% eca), the number of packages per m2 from 3,63 (100% eca) to 4,28 (75% eca), and the productivity from 3,94 (125% eca) to 4,36 kg m-2 (75% eca). as the amount of water used increased, the efficiency of water use decreased. irrigation using the water amount corresponding to 125% of eca presented the lowest (significant) water use efficiency (0,0107 pacotes m-2 mm-1), while treatments with irrigation corresponding to 50 and 75% of eca were the most efficient ones (0,0210 e 0,0174 packages m-2 mm-1, respectively).
Properties of an amylase from thermophilic Bacillus SP.
Carvalho, Raquel Vieira de;C?rrea, Thamy Lívia Ribeiro;Silva, Júlia Caroline Matos da;Mansur, Luciana Ribeiro Coutinho de Oliveira;Martins, Meire Lelis Leal;
Brazilian Journal of Microbiology , 2008, DOI: 10.1590/S1517-83822008000100023
Abstract: a-amylase production by thermophilic bacillus sp strain smia-2 cultivated in liquid cultures containing soluble starch as a carbon source and supplemented with 0.05% whey protein and 0.2% peptone reached a maximum activity at 32 h, with levels of 37 u/ml. studies on the amylase characterization revealed that the optimum temperature of this enzyme was 90oc. the enzyme was stable for 1 h at temperatures ranging from 40-50oc while at 90oc, 66% of its maximum activity was lost. however, in the presence of 5 mm cacl2, the enzyme was stable at 90oc for 30 min and retained about 58% residual activity after 1 h. the optimum ph of the enzyme was found to be 8.5. after incubation of enzyme for 2 h at ph 9.5 and 11.0 was observed a decrease of about 6.3% and 16.5% of its original activity. at ph 6.0 the enzyme lost about 36% of its original activity. the enzyme was strongly inhibited by co2+, cu2+ and ba2+, but less affected by mg2+, na+ and k+. in the presence of 2.0 m nacl, 63% of amylase activity was retained after 2 h incubation at 45oc. the amylase exhibited more than 70% activity when incubated for 1 h at 50oc with sodium dodecyl sulphate. however, very little residual activity was obtained with sodium hypochlorite and with hydrogen peroxide the enzyme was completely inhibited. the compatibility of bacillus sp smia-2 amylase with certain commercial detergents was shown to be good as the enzyme retained 86%, 85% and 75% of its activity after 20 min incubation at 50oc in the presence of the detergent brands omo?, campeiro? and tide?, respectively.
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