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Search Results: 1 - 10 of 4793 matches for " Renata; "
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Trifuntional Oligoetherols and Polyurethane Foams with Carbazole Ring  [PDF]
Renata Lubczak
Open Journal of Organic Polymer Materials (OJOPM) , 2012, DOI: 10.4236/ojopm.2012.21001
Abstract: The method of synthesis of trifuntional oligoetherols with carbazole ring from 9-(2,3-epoxypropyl)carbazole and die- thanolamine and oxiranes like ethylene and propylene oxide was presented. Structure and some physicochemical prope- rties of the products were described. The oligoetherols were demonstrated as good substrates for synthesis of polyure- thane foams of enhanced thermal resistance. It has been found that the obtained foams are rigid at room temperature and their apparent density was 34 kg/m3- 44 kg/m3. The water uptake was low, maximum to 10.5 mass%. Dynamic thermal analysis of this foams showed that 5% mass loss starts at 200?C - 220?C, while temperature of 50% mass loss was 340?C - 370?C. Concomitantly the increase of compression strength was observed.
Evaluation of phosphorus and nitrogen balances as an indicator for the impact of agriculture on environment: A comparison of a case study from Poland and Mississippi US  [PDF]
Renata Gaj, Nacer Bellaloui
Agricultural Sciences (AS) , 2012, DOI: 10.4236/as.2012.32036
Abstract: The objective of this research was to quantify the changes of nitrogen (N) and phosphorus (P) balances in Poland and Mississippi (MS), USA. Nutrient balances were calculated as difference between input and output in the agricultural system according to Organisation for Economic Cooperation and Development (OECD) methodology. A positive nutrient balance means that a potential environmental problem may result from that nutrient; a negative nutrient balance means there is a potential yield loss. The N and P soil surface balances for Poland and MS were calculated for the year 1998 through 2008. The results showed that both MS and Poland had positive N and P balances, indicating that there was a surplus of N and P. The average balance for N was 48 kg·ha-1 in Poland and 102 kg·ha-1 in MS. For P, it was 3 kg·ha-1 in Poland and 19 kg P kg·ha-1 in MS per cultivated area. This research demonstrated that the nutrient balance of N or P depended on the efficient use of each nutrient and type and source of fertilizer used. This research is significant for N and P fertilizer management and their impact on agriculture production and environment health.
Escherichia coli in seafood: A brief overview  [PDF]
Renata Albuquerque Costa
Advances in Bioscience and Biotechnology (ABB) , 2013, DOI: 10.4236/abb.2013.43A060

Considering the importance of researching the bacteriological quality of seafood, the following study aimed to make a brief overview on the occurrence of Escherichia coli in marine fish and shellfish, and to discuss the sanitary importance that the isolation of this enterobacteria represents to public health.

Quick Single Run Capillary Zone Electrophoresis Determination of Active Ingredients and Preservatives in Pharmaceutical Products  [PDF]
Marina Franco, Renata Jasionowska
American Journal of Analytical Chemistry (AJAC) , 2013, DOI: 10.4236/ajac.2013.43016

The paper deals with the development of a rapid and efficient Capillary Zone Electrophoresis (CZE) method for Quality Control analysis of pharmaceutical preparations containing antihistamines, decongestants, anticholinergic remedies and preservatives. Active ingredients of interest are: ChlorPheniramine Maleate (CPM), DiPhenhydramine Hydrochloride (DPH), Ephedrine hydrochloride (E), Isopropamide Iodide (II), Pheniramine Maleate (PM), Lidocaine hydrochloride (L), Tetracaine hydrochloride (T), Clopamide Hydrochloride (CH), DiHydroErgochristine (DHE), PhenylEphrine hydrochloride (PE) and Acetaminophen (A). Preservatives studied are: MethylParaben (MeP), EthylParaben (EtP), PropylParaben (PrP), ButylParaben (BuP), p-HydroxyBenzoic Acid (p-HBA). All these analytes were separated in a single run using 60 mM tetraborate buffer solution (TBS) pH = 9.2 as a BackGround Electrolyte (BGE) by using an uncoated fused silica capillary of I.D. = 50 mm and applying a voltage of 25 kV in the first part of the electropheretic run (up to 5.8 min) and 30 kV for the remaining time. The hydrodynamic pressurization of the inlet vial was 20 psi at 7.2 min. up to the end of analysis. Total separation time was of 7.5 min. The method was then successfully validated and applied to the simultaneous determination of active ingredients and preservatives. Good repeatability, linearity, and sensitivity were demonstrated. Precision of migration time (tm) was RSD% < 0.53% and of corrected peak area (Ac) was RSD% < 6.15%. The linearity evaluation gave 0.9928 < r2 < 1.000. LOD and LOQ, accuracy (recovery) and ruggedness were evaluated for each analyte demonstrating the good reliability of the method. Analyses of some pharmaceutical real samples were performed.

Rapid and Sensitive CZE Method for Quality Control Analysis of Pharmaceuticals Containing Pseudoephedrine, Triprolidine and Paracetamol  [PDF]
Sonia Di Berardino, Renata Jasionowska
American Journal of Analytical Chemistry (AJAC) , 2014, DOI: 10.4236/ajac.2014.59069
Abstract: A rapid and sensitive CZE (Capillary Zone Electrophoresis) method for pharmaceutical analysis was developed and fully validated. The active compounds: Pseudoephedrine hydrochloride (PSE), Triprolidine hydrochloride (TRI) and Paracetamol (PAR) were separated and quantitatively determined using the tris-borate 30 mM buffer at pH = 9.0 as a Background Electrolyte (BGE). The electrophoretic separation was carried out at 25 kV in an unmodified fused silica capillary of I.D. = 50 μm with a “bubble-cell” for UV detection at 210 nm and 25°C. The separation was reached in about 3 min. After calibration the method was applied for analysis of three commercially available pharmaceutical preparations. The repeatability (RSD%) of migration time (tm) was ranging between 0.47% and 0.90% and of peak areas (A) between 0.63% and 3.64%. The Limit of Detection (LOD) values was of 0.19 μg/mL, 0.31 μg/mL and 0.08 μg/mL for respectively PSE, TRI and PAR. The results obtained in this study showed that the proposed method was useful in routinely analysis of pharmaceuticals.
A medicaliza??o do sofrimento psíquico: considera??es sobre o discurso psiquiátrico e seus efeitos na Educa??o
Guarido, Renata;
Educa??o e Pesquisa , 2007, DOI: 10.1590/S1517-97022007000100010
Abstract: this study offers a critical analysis of the changes observed in the treatment of psychiatric suffering in recent history, noting the contribution from factors such as: the standardization of symptoms brought by the successive editions of the dsm series (diagnostic and statistical manual of mental disorders), the results of researches in neuroscience that attempt to establish the psychic functioning upon organic bases, and the huge development of psychopharmaceuticals as a result of massive financial investments. the combined action of this group of factors had as its effect the loss of the notion of sense/meaning of the symptoms and subjective sufferings, which belongs to classical psychiatry, and the growing medicalization of the individuals in contemporary society. the text seeks to outline a picture of how a new truth about the psychic sufferings was produced, and expands this analysis by showing that the medicalization procedures developed for the treatment of the adult population were extended also to children. it reviews the evolution of the treatment of children, marking the interaction between pedagogy and medicine in the constitution of child psychiatry. in addition to that, the text tries to reveal the effects of this truth upon the subjects, identifying the way in which the technical discourse (particularly influenced by the medical-psychological discourse) has been given a place in the contemporary world, and how its has influenced education. it underlines, as products of this process, the banalization of existence, the naturalization of suffering, and the blaming of individuals for the accidents of life, and argues that the psychologization of school may nowadays be replaced by the psychiatrization of school discourse. the articulation knowledge/truth/power is investigated here from the texts of michel foucault.
O Linux e a perspectiva da dádiva
Apgaua, Renata;
Horizontes Antropológicos , 2004, DOI: 10.1590/S0104-71832004000100010
Abstract: this work's goal is to analyze the appearance and consolidation of the linux operational system in a context marked by the hegemony of commercial operational systems, taking the windows/microsoft as the paradigmatic example. the creator of linux chose to make it open-source and offer it free of charge, in the internet. since then, people from the various parts of the world have participated in its development. this study, therefore, seeks to analyse the features of this space of sociability, where the exchange points to another logic different of that one adopted by the market. the proposal of comprehending the social ties of the linux universe through the perspective of gift ends up sending us into another discussion, which will also deserve attention in this study, that would be: the recentness of gift. re-interpretations of mauss, made by godbout and caillé, indicate that gif, in its "changing system", is present in the contemporary societies, but not only in certain social occasions, like mauss himself used to put it.
Linguagem e ideologia: embates teóricos
Silva, Renata;
Linguagem em (Dis)curso , 2009, DOI: 10.1590/S1518-76322009000100008
Abstract: in this essay, theoretical reflections about the way in which ideology and language are connected are compared. the purpose of this comparative analysis is to illustrate how the explanations about these two instances can be divergent. the theoretical apparatus includes classical thinkers (althusser, 1985; pêcheux, 1995, 1997; bakhtin, 1999), the contemporary author thompson (1995) and the marxist critic eagleton (1997).
E o Iphan retirou o véu da noiva e disse sim: ecletismo e modernismo no edifício Luciano Costa
Cabral, Renata;
Anais do Museu Paulista: História e Cultura Material , 2010, DOI: 10.1590/S0101-47142010000200004
Abstract: they are rare the moments in the history of the politics for the preservation of heritage in brazil in which one can see the dimension of the conflict surrounding the attribution of value to a cultural good have significant repercussion, mobilising various agents. the case of the building luciano costa, in recife, is an example of this kind. in this article we aim to present - through the interpretation of a complex web of discourses and actions - the preservationist polemic surrounding this building, a singular example of architecture, because it has two fa?ades simultaneously, one eclectic and one modern. largely unpublished, the technico-administrative documents of the 5a superintendência regional (5th regional superintendency) and of the departamento de documenta??o (documentation department) of iphan, as well as those of the funda??o do patrim?nio histórico e artístico de pernambuco (foundation for the historical and artistic heritage of pernambuco), of the diretoria de projetos especiais da empresa de urbaniza??o do recife (special projects directory of the urbanisation company of recife) and of the ministério público de pernambuco (public prosecutor of pernambuco), were the main sources targeted.
Delinquência juvenil: da disfun??o social à psicopatologia
Análise Psicológica , 2002,
Abstract: juvenile delinquency is the subject of the present papper, considering the sociologic and psychologic interpretations about it's ethiology, prevention and treatment. several dimensions of delinquency are exposed, such as the normative relations between non-normative behaviors and adolescence as a way to achieve adaptation in conflit resolution situations. pathological and normative behaviors are identified according to sociological and psychoanalitical theories. the need for primary prevention in vulnerable groups is underscored. two of the main treatment strategies are discussed: institutionalization (promoted by the legal system) and non institutionalization (promoted by health services). finally, future investigation pathways in portugal are suggested.
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