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Search Results: 1 - 10 of 188270 matches for " Cristina Paiva de;Gallo "
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Efeitos do processamento térmico e da radia??o gama na conserva??o de caldo de cana puro e adicionado de suco de frutas
Oliveira, Aline Cristine Garcia de;Spoto, Marta Helena Fillet;Canniatti-Brazaca, Solange Guidolin;Sousa, Cristina Paiva de;Gallo, Claudio Rosa;
Ciência e Tecnologia de Alimentos , 2007, DOI: 10.1590/S0101-20612007000400029
Abstract: sugarcane juice is a very well-known and popular beverage in brazil, and provided it is properly exploited, it has a high market potential. the aim of this research was to evaluate the physicochemical, microbiological and sensory stability of pure sugarcane juice and mixed with fresh lemon and pineapple juice, subjected to a heat treatment (70 °c/25 min) and/or gamma radiation (2.5 kgy) and stored in high density polyethylene bottles. the data were evaluated by variance analysis and their mean values compared by tukey's test. processing of the sugarcane juice reduced the microorganism load without significantly altering the physicochemical composition, aroma and flavor of the beverages in comparison with the control. luminosity was higher in the product subjected to the heat treatment combined with gamma radiation than that resulting from the other treatments. the polyphenol oxidase activity in the processed beverages was significantly lower than in the control. the addition of fruit juice to the sugarcane juice did not modify the latter's physicochemical composition. however, the addition of 10% pineapple juice to the sugarcane juice increased the manganese and reduced sugars content when compared with pure sugarcane juice and with sugarcane juice mixed with 4% lemon juice.
The impact of food manufacturing practices on food borne diseases
Sousa, Cristina Paiva de;
Brazilian Archives of Biology and Technology , 2008, DOI: 10.1590/S1516-89132008000400020
Abstract: food-borne illness is a major international problem and an important cause of reduced economic growth. the contamination of the food supply with the pathogens and its persistence, growth, multiplication and/or toxin production has emerged as an important public health concern. most of these problems could be controlled with the efforts on the part of the food handlers, whether in a processing plant, a restaurant, and others. in contrast with most chemical hazardous compounds, the concentration of food pathogens changes during the processing, storage, and meal preparation, making it difficult to estimate the number of the microorganisms or the concentration of their toxins at the time of ingestion by the consumer. this review shows main microorganisms related to the manipulation practices such as staphylococcus spp., escherichia coli and salmonella spp. and describes the factors regarding the food-borne illness highlighting the impact of good manipulation practices on the food safety and food quality.
Pathogenicity mechanisms of prokaryotic cells: an evolutionary view
Sousa, Cristina Paiva de;
Brazilian Journal of Infectious Diseases , 2003, DOI: 10.1590/S1413-86702003000100004
Abstract: the success of pathogenic microbes depends on their ability to colonize host tissues and to counter host defense mechanisms. microorganisms can produce overwhelming infection because of their relatively short generation times, and because they have evolved powerful mechanisms for generating phenotypic diversity as an efficient strategy for adapting to rapidly responding immune system defenses and the broad range of polymorphisms characteristic of different host tissues. bacterial evolution may not be a continuous process, but more of a succession of temporally spaced major events. these events cause a non-gradual sequence of adaptations to a given environment. the pathogenicity islands may be genetically unstable elements, and many of the genes coding for the adhesins, toxins and other virulence factors are present in pathogenicity islands, which almost certainly had former lives as accessory elements or as parts thereof, or were borne on functional accessory elements. novel genes are also acquired by transduction (mediated by bacteriophages, plasmids or transposons), by conjugation (dna transfer between cells) or by transformation (natural dna uptake). horizontal gene transfer from other species is a major source of variation and is fundamental to the genetic theory of adaptive evolution in prokaryotes.
Pathogenicity mechanisms of prokaryotic cells: an evolutionary view
Sousa Cristina Paiva de
Brazilian Journal of Infectious Diseases , 2003,
Abstract: The success of pathogenic microbes depends on their ability to colonize host tissues and to counter host defense mechanisms. Microorganisms can produce overwhelming infection because of their relatively short generation times, and because they have evolved powerful mechanisms for generating phenotypic diversity as an efficient strategy for adapting to rapidly responding immune system defenses and the broad range of polymorphisms characteristic of different host tissues. Bacterial evolution may not be a continuous process, but more of a succession of temporally spaced major events. These events cause a non-gradual sequence of adaptations to a given environment. The pathogenicity islands may be genetically unstable elements, and many of the genes coding for the adhesins, toxins and other virulence factors are present in pathogenicity islands, which almost certainly had former lives as accessory elements or as parts thereof, or were borne on functional accessory elements. Novel genes are also acquired by transduction (mediated by bacteriophages, plasmids or transposons), by conjugation (DNA transfer between cells) or by transformation (natural DNA uptake). Horizontal gene transfer from other species is a major source of variation and is fundamental to the genetic theory of adaptive evolution in prokaryotes.
Contraception Knowledge, Attitudes and Practices of Adolescents at Risk of Pregnancy in Northeastern Brazil  [PDF]
Gilka Paiva Oliveira Costa, Giulia Paiva Oliveira Costa, M?nica de Paula Farias, Ana Cristina Pinheiro Fernandes de Araújo
Open Journal of Obstetrics and Gynecology (OJOG) , 2014, DOI: 10.4236/ojog.2014.46046
Abstract:

Background: Contraceptive methods (CM) are important resources in the prevention of adolescent pregnancy. This study aimed to investigate adolescent knowledge, attitudes and practices related to contraception. Study Design: A cross-sectional and exploratory study was conducted with 7th to 9th grade adolescents in northeastern Brazil. Their knowledge, attitudes, and contraceptive method use were analysed by gender, age and sexual initiation groups. Results: A sexual debut had been experienced by 21% (n = 120) of all respondents (n = 570). The majority of the respondents who had experienced a sexual debut were male (73.3%, n = 88), their mean age was 15 years (SD = 1.46), and 49.3% (n = 59) never used any CM. The participants displayed low knowledge and unfavourable and ambivalent attitudes concerning contraception. Conclusion: Adolescents initiate sexual intercourse with knowledge and attitudes that limit the use of CM, which makes them more at risk of pregnancy. Further research that will be representative of the specific population in need of interventions is necessary.

Eventos adversos: análise de um instrumento de notifica??o utilizado no gerenciamento de enfermagem
Paiva, Miriam Cristina Marques da Silva de;Paiva, Sergio Alberto Rupp de;Berti, Heloisa Wey;
Revista da Escola de Enfermagem da USP , 2010, DOI: 10.1590/S0080-62342010000200007
Abstract: the nursing management board of a tertiary university hospital located in central-south s?o paulo state implemented an adverse events notification instrument in january 2004 aiming at patient safety and at establishing a means of communication between the team and the administration board. the aim of this study was to analyze the use of the referred communication instrument and identify the frequency, type, nature and period of the incident/adverse events. a descriptive data analysis was performed on 826 instruments completed between january 2004 and june 2006. there was compliance to using the instrument. there was predominance of notifications regarding health care services, although there was an increase in reports on administrative issues in the referred period. the most frequent adverse events concerned medications, falls, catheters, probes and drains, and skin integrity. the practicality of the instrument made it feasible for use among nursing aides and technicians. systematic analysis and follow-up of the adverse events associated with this means of communication appeared as fundamental issues for patient safety.
Posi??o prona
Paiva, Kelly Cristina de Albuquerque;Beppu, Osvaldo Shigueomi;
Jornal Brasileiro de Pneumologia , 2005, DOI: 10.1590/S1806-37132005000400011
Abstract: the prone position is a maneuver used to combat hypoxemia in patients with acute respiratory distress syndrome. despite the fact that this is currently considered an efficient way to improve oxygenation, the physiological mechanisms that bring about improvements in respiratory function are not yet fully understood. the aim of this review is to discuss the physiological and clinical aspects of the prone position in patients with acute respiratory distress syndrome.
Análise do controle por regras
Albuquerque, Luiz Carlos de;Paracampo, Carla Cristina Paiva;
Psicologia USP , 2010, DOI: 10.1590/S0103-65642010000200004
Abstract: in behavior analysis there is a proposal in which rules do not alter the probability of behavior future occurrence and another one in which rules can exercise this effect. the present study has the objective of presenting such proposals. before this, the distinction between rule-controlled behavior and the contingency-controlled behavior are presented, besides some procedures used to investigate rule control and some theoretical propositions concerning how rules function. afterwards, some reasons why rules are followed are presented, highlighting the effects of delayed consequences. in conclusion, arguments stating that rules can alter the probability of future behavior are presented.
Casamento e família no século XXI: possibilidade de holding?
Gomes, Isabel Cristina;Paiva, Maria Lucia de Souza Campos;
Psicologia em Estudo , 2003, DOI: 10.1590/S1413-73722003000300002
Abstract: this article aimed to understand the relationships inside the families and marriage as an institution in the perspective of the turning of the century. we intended to focus the perceptions of transformations that has occurred in the post-modern society in economic, social and psychological terms, searching in the winnicott?s reference theoretical subsidies to better reflect on this subject. we approach the role of therapists in the context and show that marriage as well as therapy, might have a therapeutic potential if it is connected to a notion of mutation, flexibility for the new and different, space of interpersonal development and creativity.
Conhecimento e atitudes de trabalhadores de um servi?o público de emergência sobre ado??o de precau??es padr?o
Paiva, Maria Henriqueta Rocha Siqueira;Oliveira, Adriana Cristina de;
Revista Brasileira de Enfermagem , 2011, DOI: 10.1590/S0034-71672011000400012
Abstract: the aims of the study were to evaluate the adoption of the precaution measures, assessing knowledge and attitude of multiprofessional team. this is a transversal study, accomplished in an emergency medical service of minas gerais. univariate and multivariate analysis were used. the results showed that nurses and drivers had the highest and lowest level of knowledge regarding the standard precautions, respectively. the possibility of non-adoption of the precautionary measures was 3.76 (95% ci: 1.48 to 9.53) times higher among professionals aged over 31 years and 6.7 (95% ci: 1.81 to 24,75) times greater among workers in crowded unit of basic support. the conclusion is that is essential to implement strategies in order to improve the professional's knowledge related to infection control and safety recommendations.
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