oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 5 )

2019 ( 263 )

2018 ( 320 )

2017 ( 332 )

Custom range...

Search Results: 1 - 10 of 222406 matches for " Amanda G; Oliveira "
All listed articles are free for downloading (OA Articles)
Page 1 /222406
Display every page Item
Study of the Reaction Derivatization Glyphosate and Aminomethylphosphonic Acid (AMPA) with N,O-Bis(trimethylsilyl)trifluoroacetamide  [PDF]
T. C. P. G. Catrinck, Maria Clara Santana Aguiar, Amanda Dias, Flaviano Oliveira Silvério, Paulo Henrique Fidêncio, Gevany Paulino de Pinho
American Journal of Analytical Chemistry (AJAC) , 2013, DOI: 10.4236/ajac.2013.411077
Abstract:

This work aimed to study the derivatization unprecedented of glyphosate and AMPA solutions using N,O-bis (trimethylsilyl)trifluoroacetamide (BSTFA) combined with trimethylchlorosilane (TMCS), evaluating the composition of the reaction medium, use of ultrasound, volume of BSTFA:pyridine and pH of the reaction medium. From this study it was inferred that the reaction medium was composed of BSTFA:pyridine in ratio 60:100, respectively, without ultrasonic vibration and pH adjustment that provide optimal conditions for analysis by GC-MS. Furthermore, the methodology used was simple and fast, and that was the most practical method commonly used.

Spinal motoneuron synaptic plasticity after axotomy in the absence of inducible nitric oxide synthase
Amanda Emirandetti, Gustavo F Sim?es, Renata G Zanon, Alexandre LR Oliveira
Journal of Neuroinflammation , 2010, DOI: 10.1186/1742-2094-7-31
Abstract: In vivo analyses were carried out using C57BL/6J-iNOS knockout (iNOS-/-) and C57BL/6J mice. Glial response after axotomy, glial MHC I expression, and the effects of axotomy on synaptic contacts were measured using immunohistochemistry and transmission electron microscopy. For this purpose, 2-month-old animals were sacrificed and fixed one or two weeks after unilateral sciatic nerve transection, and spinal cord sections were incubated with antibodies against classical MHC I, GFAP (glial fibrillary acidic protein - an astroglial marker), Iba-1 (an ionized calcium binding adaptor protein and a microglial marker) or synaptophysin (a presynaptic terminal marker). Western blotting analysis of MHC I and nNOS expression one week after lesion were also performed. The data were analyzed using a two-tailed Student's t test for parametric data or a two-tailed Mann-Whitney U test for nonparametric data.A statistical difference was shown with respect to astrogliosis between strains at the different time points studied. Also, MHC I expression by iNOS-/- microglial cells did not increase at one or two weeks after unilateral axotomy. There was a difference in synaptophysin expression reflecting synaptic elimination, in which iNOS-/- mice displayed a decreased number of the inputs to alpha motoneurons, in comparison to that of C57BL/6J.The findings herein indicate that iNOS isoform activity influences MHC I expression by microglial cells one and two weeks after axotomy. This finding was associated with differences in astrogliosis, number of presynaptic terminals and synaptic covering of alpha motoneurons after lesioning in the mutant mice.Nitric oxide (NO) is a gaseous free radical generated in most cells as a result of a diverse range of stimuli. This molecule may show protective effects in the nervous system, although pathologically elevated levels result in cytotoxicity. There are three major forms of enzyme that synthesize NO from L-arginine: the so-called NOS (nitric oxide synth
Endovascular Treatment of Giant Splenic Artery Aneurysm
Adenauer Marinho de Oliveira Góes Junior,Amanda Silva de Oliveira Góes,Paloma Cals de Albuquerque,Renato Menezes Palácios,Simone de Campos Vieira Abib
Case Reports in Surgery , 2012, DOI: 10.1155/2012/964093
Abstract: Introduction. Visceral artery aneurysms are uncommon. Among them, splenic artery is the most common (46–60%). Most splenic artery aneurysms are asymptomatic and diagnosed incidentally, but its rupture, potentially fatal, occurs in up to 8% of cases. Presentation of Case. A female patient, 64 years old, diagnosed with a giant aneurysm of the splenic artery (approximately 6.5?cm in diameter) was successfully submitted to endovascular treatment by stent graft implantation. Discussion. Symptomatic aneurysms and those larger than 2?cm represent some of the main indications for intervention. The treatment may be by laparotomy, laparoscopy, or endovascular techniques. Among the various endovascular methods discussed in this paper, there is stent graft implantation, a method still few reported in the literature. Conclusion. Although some authors still consider the endovascular approach as an exception to the treatment of SAA, in major specialized centers these techniques have been consolidated as the preferred choice, reserving the surgical approach in cases where this cannot be used. For being a less aggressive approach, it offers an opportunity of treatment to patients considered “high risk” for surgical treatment by laparotomy/laparoscopy. 1. Introduction Visceral artery aneurysms (VAAs) are uncommon. Among them, splenic artery is the most common (46–60%), followed by hepatic artery (20%) and superior mesenteric artery (5-6%) [1–6]. Seventy-five percent of VAAs are asymptomatic. The most common symptom is pain in the upper left quadrant of the abdomen or in the epigastrium, radiating to left shoulder, nausea, and vomiting. [1, 2, 7, 8]. The rupture occurs in 3% to 8% of cases, is manifested by hypovolemic shock, and is potentially fatal [1, 2, 4, 7, 8]. The splenic artery aneurysms can be approached by laparotomy, laparoscopy, or endovascular techniques. The endovascular option, less invasive, has less morbidity and faster postoperative recovery [1–4, 8]. Among the various endovascular techniques, covered stent implantation has been little reported in the literature. The authors present a case of splenic artery aneurysm treated by this method. 2. Presentation of Case A female patient, 64 years old, controlled hypertension, and 2 previous pregnancies, presented as main complaint episodes of mild pain in the epigastrium and left hypochondrium, evolving for about 12 months. Physical examination of the abdomen was nonspecific, with ill-defined pain on palpation of the mesogastrium and left hypochondrium. In the hospital of origin she was submitted to
A importancia da investiga??o narrativa na educa??o
Rabelo, Amanda Oliveira;
Educa??o & Sociedade , 2011, DOI: 10.1590/S0101-73302011000100011
Abstract: this paper analyzes the importance of research narrative to investigate day-to-day education. it describes the relevance of such research as a contribution to linking theory and practice, the social and the individual. after highlighting the characteristics of this kind of research, it distinguishes between two forms (narrative and paradigmatic) of cognition and, thus, two forms of analysis within narrative research. it then describes both, pointing out their positive and negative sides to shows that they can be complementary (non-dichotomous) and have much to contribute to educational research. finally, to bypass the doubts that mark any investigation, all the issues, including practices, must be considered and the care in search of narrative bases to investigate education must be intensified.
Contribui??es dos Estudos de Género às Investiga??es que Enfocam a Masculinidade
Rabelo,Amanda Oliveira;
Ex aequo , 2010,
Abstract: what is masculinity? can men be feminine? masculine and feminine are constructed, so they involve several aspects, including feelings. this paper will analyze gender issues and their contributions to research and how gender and masculinity are constructed.
"Eu gosto de ser professor e gosto de crian?as” - A escolha pro?ssional dos homens pela docência na escola primária
Rabelo,Amanda Oliveira;
Revista Lusófona de Educa??o , 2010,
Abstract: this paper is part of a comparative study a comparative study that performs a search focused on the ?gure of the male teacher who works in the “primary” public education in rio de janeiro-brazil and in aveiro-portugal. we intended, fundamentally, to investigate the reasons of the professional choice of teachers who are engaged in an area typically associated with women. we demonstrate that the presence of male teachers in the teaching of this segment is a way of putting the issues of gender in the education, showing that there are other voices that echo in the schools, or capable individuals of exercising this profession regardless of gender. we demonstrate that, unlike that disclose some representations that circulate in society, men like of children and choose the teaching profession by taste.
Memória e subjetividade: elementos para refletir sobre a singularidade das professoras
Amanda Oliveira Rabelo
Educa??o : Revista do Centro de Educa??o UFSM , 2007,
Abstract: Este artigo tem como objetivo relacionar a memória com os processos de subjetiva o da sociedade e dos professores, dessa forma é necessário esclarecer alguns termos como identidade e subjetividade, com o aporte de autores como Foucault, Hardt, Gondar, entre outros. Indica-se a singularidade como resistência às tentativas das injun es do poder presentes na nossa sociedade. Singularidade proposta no conceito professoralidade (de Marcos Pereira) para uma constru o da subjetividade do professor distanciada da identidade fixa que o poder tenta moldar. Professoralidade que é exercida na uni o dos professores e na divulga o e reflex o de suas experiências. Palavras-chave: Memória. Subjetividade. Singularidade.
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.

Bioconversion of cassava starch by-product into Bacillus and related bacteria polyhydroxyalkanoates
Krueger,Cristhiane L; Radetski,Claudemir M; Bendia,Amanda G; Oliveira,Ida M; Castro-Silva,Marcus A; Rambo,Carlos R; Antonio,Regina V; Lima,André O.S.;
Electronic Journal of Biotechnology , 2012,
Abstract: background: unlike petroleum-based synthetic plastics, biodegradable biopolymer generation from industrial residue is a key strategy to reduce costs in the production process, as well as in the waste management, since efficient industrial wastewater treatment could be costly. in this context, the present work describes the prospection and use of bacterial strains capable to bioconvert cassava starch by-product into biodegradable polyhydroxyalkanoates (phas). results: the first step of this study was the bacterial competence screening which was conducted with 72 strains covering 21 bacillus and related species. the microorganism growth in a medium with a starch substrate was measured by an innovative mtt assay, while the ability of the bacteria to secrete amylase and produce pha was evaluated by the nile red dye method. based on growth and potential for pha production, four isolates were selected and identified as bacillus megaterium by 16s rrna sequencing. when cultivated in hydrolyzed cassava starch by-product, maximum production reached 4.97 g dry biomass/l with 29.7% of poly-(3-hydroxybutyrate) (characterized by ftir). conclusions: mtt assay proved to be a reliable methodology for monitoring bacterial growth in insoluble media. selected amylolytic strains could be used as an alternative industrial process for biodegradable plastics production from starchy residues, reducing costs for biodegradable biopolymer production and wastewater treatment operations.
In Vitro effect of low-level laser therapy on typical oral microbial biofilms
Basso, Fernanda G.;Oliveira, Camila F.;Fontana, Amanda;Kurachi, Cristina;Bagnato, Vanderlei S.;Spolidório, Denise M. P.;Hebling, Josimeri;Costa, Carlos A. de Souza;
Brazilian Dental Journal , 2011, DOI: 10.1590/S0103-64402011000600011
Abstract: the aim of this study was to evaluate the effect of specific parameters of low-level laser therapy (lllt) on biofilms formed by streptococcus mutans, candida albicans or an association of both species. single and dual-species biofilms - ssb and dsb - were exposed to laser doses of 5, 10 or 20 j/cm2 from a near infrared ingaasp diode laser prototype (lasertable; 780 ± 3 nm, 0.04 w). after irradiation, the analysis of biobilm viability (mtt assay), biofilm growth (cfu/ml) and cell morphology (sem) showed that lllt reduced cell viability as well as the growth of biofilms. the response of s. mutans (ssb) to irradiation was similar for all laser doses and the biofilm growth was dose dependent. however, when associated with c. albicans (dsb), s. mutans was resistant to lllt. for c. albicans, the association with s. mutans (dsb) caused a significant decrease in biofilm growth in a dose-dependent fashion. the morphology of the microorganisms in the ssb was not altered by lllt, while the association of microbial species (dsb) promoted a reduction in the formation of c. albicans hyphae. lllt had an inhibitory effect on the microorganisms, and this capacity can be altered according to the interactions between different microbial species.
Page 1 /222406
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.