Determinação do teor de cálcio através da termogravimetria, em medicamentos utilizados no tratamento da osteoporose: um estudo comparativo

The present study utilized the thermogravimetry (TG) and optical emission spectroscopy with inductively coupled plasma - ICP / OES to determine the calcium content in tablets of carbonate, citrate and calcium lactate used in the treatment of osteoporosis. The samples were characterized by IR, SEM, TG / DTG, DTA, DSC and XRD. The thermal analysis evaluated the thermal stability and physical-chemical events and showed that the excipients influence the decomposition of active ingredients. The results of thermogravimetry indicated that the decomposition temperature of the active CaCO3 (T = 630.2 °C) is lower compared to that obtained in samples of the tablets (633.4 to 655.2 °C) except for sample AM 2 (Ti = 613.8 oC). In 500.0 °C in the samples of citrate and calcium lactate, as well as their respective active principles had already been formed calcium carbonate. The use of N2 atmosphere resulted in shifting the initial and final temperature related to the decomposition of CaCO3. In the DTA and DSC curves were observed endo and exothermic events for the samples of tablets and active ingredients studied. The infrared spectra identified the main functional groups in all samples of active ingredients, excipients and tablets studied, such as symmetric and asymmetric stretches of the groups OH, CH, C = O. Analysis by X-ray diffraction showed that all samples are crystalline and that the final residue showed peaks indicative of the presence of calcium hydroxide by the reaction of calcium oxide with moisture of the air. Although the samples AM 1, AM 2, AM 3 and AM 6 in their formulations have TiO2 and SiO2 peaks were not observed in X-ray diffractograms of these compounds. The results obtained by TGA to determine the calcium content of the drugs studied were satisfactory when compared with those obtained by ICP-OES. In the AM 1 tablet was obtained the content of 35.37% and 32.62% for TG by ICP-OES, at 6 AM a percentage of 17.77% and 16.82% and for AM 7 results obtained were 8.93% for both techniques, showing that the thermogravimetry can be used to determine the percentage of calcium in tablets. The technique offers speed, economy in the use of samples and procedures eliminating the use of acid reagents in the process of the sample and efficiency results.

Determinação da energia de ativação e pureza de medicamentos de referência, genérico e similar utilizando técnicas termoanalíticas

In this work, the reference drugs, generic and similar to the active ingredients acetylsalicylic acid, paracetamol, captopril, hydrochlorothiazide and mebendazole were purchased from local pharmacies and studied by thermogravimetry (TG) and Differential Scanning Calorimetry (DSC). Thermal decomposition was assessed to obtain from the Ozawa method the activation energy in inert atmosphere (nitrogen), using three different heating ratios (5, 10 and 20 o C min-1). The pharmaceutical formulation of the AAS reference was the one who presented different from the others (generic and similar) Thermogravimetric profile indicating likely interaction between the active ingredient and excipients. Was observed at the heating rate of the inverse temperature that no linearity of the data, ie, there was no correlation between the percentage of mass loss and the activation energy involved in the thermal decomposition of the pharmaceutical formulation of the AAS reference log graph. The analysis by differential scanning calorimetry was performed in nitrogen atmosphere with a heating rate of 10 ° C min-1. In the analysis of these same drugs, the data curves found on the melting point were, except for hydrochlorothiazide, are consistent with the literature. Hydrochlorothiazide presented a melting point well below that found in the literature, which may be justified due to the interaction of the active ingredient with the excipient lactose. In the study of purity, using the Van't Hoff equation, the reference drugs hydrochlorothiazide and mebendazole reference generic and showed similar impurity content below the limit established that this equation must be greater than 2.5 mol%

Um modelo de portfólio para gestão estratégica de compras hospitalares

O presente estudo, baseado no modelo teórico de portfólio de compras proposto por Kraljic (1983), apresenta um modelo de portfólio de compras voltado para gestão de compras hospitalares, por meio da aplicação do método de decisão multicritério Fuzzy-TOPSIS. Para fins de exemplificação do método, a pesquisa foi aplicada em um Hospital de grande porte localizado em Natal/RN e teve como amostra doze itens de compras. Os itens foram avaliados pelo grupo de decisores nas dimensões de importância da compra e complexidade de fornecimento, sendo cada dimensão composta por quatro critérios. Por meio da utilização do método Fuzzy-TOPSIS e de regras de decisão, os itens foram classificados entre as categorias: estratégicos, gargalos, alavancagem e não-críticos. O resultado dessa etapa identificou três itens estratégicos, seis itens gargalos, um item de alavancagem e dois itens não-críticos. Para os três itens classificados como estratégicos, foi aplicado o método Fuzzy-TOPSIS visando a identificar o posicionamento estratégico do Hospital em relação aos fornecedores desses itens, a partir da avaliação das dimensões força do mercado fornecedor e força da empresa compradora, sendo cada uma composta por quatro critérios. Nessa etapa, foi identificada uma postura de balanceamento das forças. Conclui-se a efetividade da ferramenta de portfólio de compras para gestão hospitalar, proporcionando uma visão mais clara das características, inerentes ao processo de compras nesse contexto complexo. O método Fuzzy-TOPSIS apresentou-se como uma ferramenta flexível, capaz de lidar com problemas de classificação, gerando resultados satisfatórios e contribuindo para a tomada de decisão.

Desenvolvimento de métodos para quantificação de benzilpenicilina em medicamentos veterinários e seus resíduos em leite bovino e caprino por UFLC-DAD

The Benzylpenicillin (PENG) have been as the active ingredient in veterinary medicinal products, to increase productivity, due to its therapeutic properties. However, one of unfortunate quality and used indiscriminately, resulting in residues in foods exposed to human consumption, especially in milk that is essential to the diet of children and the ageing. Thus, it is indispensable to develop new methods able to detect this waste food, at levels that are toxic to human health, in order to contribute to the food security of consumers and collaborate with regulatory agencies in an efficient inspection. In this work, were developed methods for the quality control of veterinary drugs based on Benzylpenicillin (PENG) that are used in livestock production. Additionally, were validated methodologies for identifying and quantifying the antibiotic residues in milk bovine and caprine. For this, the analytical control was performed two steps. At first, the groups of samples of medicinal products I, II, III, IV and V, individually, were characterized by medium infrared spectroscopy (4000 – 600 cm-1). Besides, 37 samples, distributed in these groups, were analyzed by spectroscopy in the ultraviolet and near infrared region (UV VIS NIR) and Ultra Fast Liquid Chromatograph coupled to linear arrangement photodiodes (UFLC-DAD). The results of the characterization indicated similarities, between PENG and reference standard samples, primarily in regions of 1818 to 1724 cm-1 of ν C=O that shows primary amides features of PENG. The method by UFLC-DAD presented R on 0.9991. LOD of 7.384 × 10-4 μg mL-1. LOQ of 2.049 × 10-3 μg mL-1. The analysis shows that 62.16% the samples presented purity ≥ 81.21%. The method by spectroscopy in the UV VIS NIR presented medium error ≤ 8 – 12% between the reference and experimental criteria, indicating is a secure choice for rapid determination of PENG. In the second stage, was acquiring a method for the extraction and isolation of PENG by the addition of buffer McIlvaine, used for precipitation of proteins total, at pH 4.0. The results showed excellent recovery values PENG, being close to 92.05% of samples of bovine milk (method 1). While samples of milk goats (method 2) the recovery of PENG were 95.83%. The methods for UFLC-DAD have been validated in accordance with the maximum residue limit (LMR) of 4 μg Kg-1 standardized by CAC/GL16. Validation of the method 1 indicated R by 0.9975. LOD of 7.246 × 10-4 μg mL-1. LOQ de 2.196 × 10-3 μg mL-1. The application of the method 1 showed that 12% the samples presented concentration of residues of PENG > LMR. The method 2 indicated R by 0.9995. LOD 8.251 × 10-4 μg mL-1. LOQ de 2.5270 × 10-3 μg mL-1. The application of the method showed that 15% of the samples were above the tolerable. The comparative analysis between the methods pointed better validation for LCP samples, because the reduction of the matrix effect, on this account the tcalculs < ttable, caused by the increase of recovery of the PENG. In this mode, all the operations developed to deliver simplicity, speed, selectivity, reduced analysis time and reagent use and toxic solvents, particularly if compared to the established methodologies.

Desenvolvimento de métodos para quantificação de benzilpenicilina em medicamentos veterinários e seus resíduos em leite bovino e caprino por UFLC-DAD

The Benzylpenicillin (PENG) have been as the active ingredient in veterinary medicinal products, to increase productivity, due to its therapeutic properties. However, one of unfortunate quality and used indiscriminately, resulting in residues in foods exposed to human consumption, especially in milk that is essential to the diet of children and the ageing. Thus, it is indispensable to develop new methods able to detect this waste food, at levels that are toxic to human health, in order to contribute to the food security of consumers and collaborate with regulatory agencies in an efficient inspection. In this work, were developed methods for the quality control of veterinary drugs based on Benzylpenicillin (PENG) that are used in livestock production. Additionally, were validated methodologies for identifying and quantifying the antibiotic residues in milk bovine and caprine. For this, the analytical control was performed two steps. At first, the groups of samples of medicinal products I, II, III, IV and V, individually, were characterized by medium infrared spectroscopy (4000 – 600 cm-1). Besides, 37 samples, distributed in these groups, were analyzed by spectroscopy in the ultraviolet and near infrared region (UV VIS NIR) and Ultra Fast Liquid Chromatograph coupled to linear arrangement photodiodes (UFLC-DAD). The results of the characterization indicated similarities, between PENG and reference standard samples, primarily in regions of 1818 to 1724 cm-1 of ν C=O that shows primary amides features of PENG. The method by UFLC-DAD presented R on 0.9991. LOD of 7.384 × 10-4 μg mL-1. LOQ of 2.049 × 10-3 μg mL-1. The analysis shows that 62.16% the samples presented purity ≥ 81.21%. The method by spectroscopy in the UV VIS NIR presented medium error ≤ 8 – 12% between the reference and experimental criteria, indicating is a secure choice for rapid determination of PENG. In the second stage, was acquiring a method for the extraction and isolation of PENG by the addition of buffer McIlvaine, used for precipitation of proteins total, at pH 4.0. The results showed excellent recovery values PENG, being close to 92.05% of samples of bovine milk (method 1). While samples of milk goats (method 2) the recovery of PENG were 95.83%. The methods for UFLC-DAD have been validated in accordance with the maximum residue limit (LMR) of 4 μg Kg-1 standardized by CAC/GL16. Validation of the method 1 indicated R by 0.9975. LOD of 7.246 × 10-4 μg mL-1. LOQ de 2.196 × 10-3 μg mL-1. The application of the method 1 showed that 12% the samples presented concentration of residues of PENG > LMR. The method 2 indicated R by 0.9995. LOD 8.251 × 10-4 μg mL-1. LOQ de 2.5270 × 10-3 μg mL-1. The application of the method showed that 15% of the samples were above the tolerable. The comparative analysis between the methods pointed better validation for LCP samples, because the reduction of the matrix effect, on this account the tcalculs < ttable, caused by the increase of recovery of the PENG. In this mode, all the operations developed to deliver simplicity, speed, selectivity, reduced analysis time and reagent use and toxic solvents, particularly if compared to the established methodologies.

Função compras no setor público: fatores preponderantes para o alcance da celeridade dos pregões eletrônicos da Base Aérea de Natal

This study discusses the issue of deadlines in the purchasing process within the Federal Public Administration. Your main goal is to analyze the main factors that influenced, mainly in the implementation of sub-phases of electronic trading in BANT, in 2014, as service to the principle of celerity. The research is descriptive since they were identified and analyzed the factors that influenced in terms of purchases, through direct observation and interviews. Based on the theoretical framework, the purchasing function, four dimensions of analysis were established: "Legislation and procurement processes", "Structure and Organization of the purchasing department", "purchasing systems" and "Human Resources of the purchasing department." Analysis showed that, unlike what happens in the private sector, the public procurement sector has not reached a strategic status within organizations, which brings harmful consequences to the speed of the purchases. It was found that there is a need for greater involvement of the purchasing department staff and criers in the formulation of the organization's purchasing strategies and that these purchases elements present, about their attitudes, a hybrid profile, proactive regarding specifications of the items, but reactive in relation to the need to urgently purchase, due to the lack of a better plan, which overloads the work of the sector. The observation of these strategic aspects of the procurement function in BANT influenced the finding that the lack of staff and expertise in investments plus the lack of rigor and formality of legislation, among other factors, contributed mainly to the lack of speed of processes.

Projeto de intervenção adaptando o Balanced Scorecard ao sistema de compras da Base Aérea de Natal

The present proposal for intervention examines the issue of public procurements carried out by a military organization on a Federal Public Administration. The main objective of this paper is to propose a model of strategic planning based on the Balanced Scorecard for the public procurement system, which contributes to increased efficiency, efficacy and effectiveness of acquisitions made in the Air Base of Natal city. Therefore, Structured interviews were used in order to make a diagnosis of the current reality of the procurement system along with the main requirement sectors of BANT, as well as the adaptation of the prospects of the BSC based on literature review. The technique used for the analysis of the interviews was the analysis of content whose results contributed to the preparation of the conceptual Strategic Map which was submitted to validation through a Focal Group. It was concluded through the analysis of the interviews, that the system of purchases of BANT is in a tactical profile because of low interaction between the system of purchases and the requirement sectors, aiming only at the “economicity” of acquisition in opposition of the effectiveness of material acquired, the lack of training of the elements which build the system and the absence of a proper planning. It is intended with thecreation of this proposal to contribute to the improvement of management with a focus on results in public administration as well as increasing efficiency, efficacy and effectiveness of public procurements. Whereas for the particular case the measurement of the results can only be performed after at least a year of its implementation, the present research constitutes a proposal of intervention.

A prescrição de medicamentos por enfermeiros na atenção primária à saúde no Brasil: caracterização, normatização, formação e lições aprendidas.

O papel do enfermeiro como prescritor vem se ampliando em muitos países nos últimos anos, em diferentes situações e amplitudes de ação, se configurando como prática avançada na enfermagem. No Brasil, a prescrição de medicamentos por enfermeiros está prevista na Lei do Exercício Profissional desde 1986, e permite a esse profissional, a prescrição de medicamentos estabelecidos em programas de saúde pública. Esse estudo tem como objetivo geral analisar as determinações e perspectivas da prescrição de medicamentos por enfermeiros nos protocolos da Estratégia Saúde da Família. Os objetivos específicos são: apreender a atual situação internacional da prescrição de medicamentos por enfermeiros em comparação a essa prática no Brasil identificando semelhanças e diferenças; identificar os contornos legais e normativos da prescrição de medicamentos por enfermeiros no Brasil apontando sua história, tendências e desafios; caracterizar o modelo de prescrição de medicamentos por enfermeiros nos protocolos de Atenção Primária à Saúde no Brasil; investigar possíveis lacunas entre formação, capacitação, autoavaliação e prática da prescrição de medicamentos na Atenção Primária à Saúde na perspectiva do enfermeiro. Trata-se de Estudo de Caso Exemplar com abordagem qualitativa através de Revisão Bibliográfica, Análise Documental e Grupo Focal com enfermeiros. A análise dos dados deu-se por meio da Análise de Conteúdo e Análise Qualitativa de Conteúdo. Os resultados revelam que a categoria da enfermagem contribuiu para a legalização da prescrição, porém não para a sua legitimação; na Atenção Primária à Saúde, essa atribuição está consolidada por meio de protocolos e legislação, embora sem estratégia clara de acompanhamento pelo Ministério da Saúde; observa-se resistência em algumas normatizações dentro do setor saúde. Quanto aos protocolos, observou-se não há exigência de pré-requisitos na maioria deles; há possibilidade de diagnóstico pelo enfermeiro na gravidez, nutrição infantil e doenças sexualmente transmissíveis; observou-se variados graus de autonomia; amplo grupo de medicamentos prescritos por enfermeiros. Dos 37 participantes do Grupo Focal, 97,3% eram do sexo feminino; 54% formados há menos de 10 anos, 27% entre 10 e 20 anos, 16,2% há mais de 20 anos; 83,8% com especialização em Saúde Pública. Todos os enfermeiros relataram insuficiência da disciplina de farmacologia para instrumentalizar a prática prescritiva. Destacou-se a necessidade de pós-graduação; a importância da experiência clínica; falta de discussões e capacitação. Apenas alguns se autoavaliaram como competentes para prescrever, outros revelam medo de reação adversa a medicamentos. Conclui-se que há tendência da prescrição de medicamento por enfermeiros permanecer apenas na legalidade e o principal desafio é alcançar a legitimidade. Confirma-se uma prática prescritiva sem requisitos, diversidade de orientações induzindo a multiplicidade de ações que pode afetar a qualidade da prescrição. Há lacunas entre formação, capacitações e exigências cotidianas da prescrição de medicamentos por enfermeiros na Atenção Primária à Saúde. No Brasil se faz premente pesquisa para avaliar o impacto, a qualidade e a segurança da prescrição de medicamentos por enfermeiros. A experiência internacional sugere também que essa prescrição deve ser apoiada pelo coletivo de enfermeiros, com robusto plano de capacitação nacional, além de governança e apoio local.

A confiança interorganizacional nas compras

This research is part of the field of organizational studies, focusing on organizational purchase behavior and, specifically, trust interorganizational at the purchases. This topic is current and relevant by addressing the development of good relations between buyer-supplier that increases the exchange of information, increases the length of relationship, reduces the hierarchical controls and improves performance. Furthermore, although there is a vast literature on trust, the scientific work that deal specifically at the trust interorganizational still need further research to synthesize and validate the variables that generate this phenomenon. In this sense, this investigation is to explain the antecedents of trust interorganizational by the relationship between the variable operational performance, organizational characteristics, shared values and interpersonal relationships on purchases by manufacturing industries, in order to develop a robust literature, most consensual, that includes the current sociological and economic, considering the effect of interpersonal relationships in this phenomenon. This proposal is configured in a new vision of the antecedents of interorganizational trust, described as significant quantitative from models Morgan and Hunt (1994), Doney and Cannon (1997), Zhao and Cavusgil (2006) and Nyaga, Whipple, Lynch (2011), as well as qualitative analysis of Tacconi et al. (2011). With regard to methodological aspects, the study assumes the form of a descriptive, survey type, and causal trace theoretical and empirical. As for his nature, the investigation, explicative character, has developed a quantitative approach with the use of exploratory factor analysis and structural equation modeling SEM, with the use of IBM software SPSS Amos 18.0, using the method of maximum verisimilitude, and supported by technical bootstraping. The unit of analysis was the buyer-supplier relationship, in which the object under investigation was the supplier organization in view of the purchasing company. 237 valid questionnaires were collected among key informants, using a simple random sampling developed in manufacturing industries (SIC 10-33), located in the city of Natal and in the region of Natal. The first results of descriptive analysis demonstrate the phenomenon of interorganizational trust, in which purchasing firms believe, feel secure about the supplier. This demonstration showed high levels of intensity, predominantly among the vendors that supply the company with materials that are used directly in the production process. The exploratory and confirmatory factor analysis, performed on each variable alone, generated a set of observable and unobservable variables more consistent, giving rise to a model, that needed to be further specified. This again specify model consists of trajectories was positive, with a good fit, with a composite reliability and variance extracted satisfactory, and demonstrates convergent and discriminant validity, in which the factor loadings are significant and strong explanatory power. Given the findings that reinforce the model again specify data, suggesting a high probability that this model may be more suited for the study population, the results support the explanation that interorganizational trust depends on purchases directly from interpersonal relationships, sharing value and operating performance and indirectly of personal relationships, social networks, organizational characteristics, physical and relational aspect of performance. It is concluded that this trust can be explained by a set of interactions between these three determinants, where the focus is on interpersonal relationships, with the largest path coefficient for the factor under study

Crenças normativas e comportamentais e suas influências na intenção de adoção de um sistema de informação: um estudo na área de compras da UFPA

The study aims to identify the factors that influence the behavior intention to adopt an academic Information System (SIE), in an environment of mandatory use, applied in the procurement process at the Federal University of Pará (UFPA). For this, it was used a model of innovation adoption and technology acceptance (TAM), focused in attitudes and intentions regarding the behavior intention. The research was conducted a quantitative survey, through survey in a sample of 96 administrative staff of the researched institution. For data analysis, it was used structural equation modeling (SEM), using the partial least squares method (Partial Least Square PLS-PM). As to results, the constructs attitude and subjective norms were confirmed as strong predictors of behavioral intention in a pre-adoption stage. Despite the use of SIE is required, the perceived voluntariness also predicts the behavior intention. Regarding attitude, classical variables of TAM, like as ease of use and perceived usefulness, appear as the main influence of attitude towards the system. It is hoped that the results of this study may provide subsidies for more efficient management of the process of implementing systems and information technologies, particularly in public universities