Polymeric electronic gas sensor for determining alcohol content in automotive fuels

In this paper we describe the electrosynthesis of poly[(2-bromo-5-hexyloxy- 1,4-phenylenevinylene)-co-(1,4-phenylenevinylene)] (BHPPV-co-PPV), a novel conducting copolymer, and its application as active layer of a chemiresistive gas sensor suitable for quantification of ethanol present in ethanol-gasoline mixtures normally present in the fuel tanks of flex-fuel vehicles. This information is crucial for the smooth operation of the engine since it permits optimal air:fuel ratio regulation. The sensor consists of an interdigitated electrode coated with a thin polymer film doped with dodecylbenzenesulfonic acid. On exposure to fuel vapours at room temperature, the device presents a linear correlation between its electrical conductance and the ethanol concentration in the fuel. (C) 2008 Elsevier B.V. All rights reserved.

Thermo-solvatochromism of merocyanine polarity probes - What are the consequences of increasing probe lipophilicity through annelation?

The question raised in the title has been answered by comparing the solvatochromism of two series of polarity probes, the lipophilicities of which were increased either by increasing the length of an alkyl group (R) attached to a fixed pyridine-based structure or through annelation (i.e., by fusing benzene rings onto a central pyridine-based structure). The following novel solvatochromic probes were synthesized: 2,6-dibromo-4-[(E)-2-(1-methylquinolinium-4-yl)ethenyl]-phenolate (MeQMBr(2)) and 2,6-dibromo-4-[(E)-2-(1-methyl-acridinium-4- yl) ethenyl)]phenolate (MeAMBr(2) The solvatochromic behavior of these probes, along with that of 2,6dibromo-4-[(E)-2-(1-methylpyridinium-4-yl)ethenyl]phenol-ate(MePMBr(2)) was analyzed in terms of increasing probe lipophilicity, through annelation. Values of the empirical solvent polarity scale [E(T)(MePMBr(2))] in kcalmol(-1) correlated linearly with ET(30), the corresponding values for the extensively employed probe 2,6-diphenyl-4-(2,4,6-triphenylpyridinium-1-yl)phenolate (RB). On the other hand, the nonlinear correlations of ET(MeQMBr(2)) or ET(MeAMBr(2)) with E(T)(30) are described by second-order polynomials. Possible reasons for this behavior include: i) self-aggregation of the probe, ii) photoinduced cis/trans isomerization of the dye, and iii) probe structure- and solvent-dependent contributions of the quinonoid and zwitterionic limiting formulas to the ground and excited states of the probe. We show that mechanisms (i) and (ii) are not operative under the experimental conditions employed; experimental evidence (NMR) and theoretical calculations are presented to support the conjecture that the length of the central ethenylic bond in the dye increases in the order MeAMBr(2) > MeQMBr(2) > MePMBr(2), That is, the contribution of the zwitterionic limiting formula predominates for the latter probe, as is also the case for RB, this being the reason for the observed linear correlation between the ET(MePMBr2) and the ET(30) scales. The effect of increasing probe lipophilicity on solvatochromic behavior therefore depends on the strategy employed. Increasing the length of R affects solvatochromism much less than annelation, because the former structural change hardly perturbs the energy of the intramolecular charge-transfer transition responsible for solvatochromism. The thermo-solvatochromic behavior (effect of temperature on solvatochromism) of the three probes was studied in mixtures of water with propanol and/or with DMSO. The solvation model used explicitly considers the presence of three ""species"" in the system: bulk solution and probe solvation shell [namely, water (W), organic solvent (Solv)], and solvent-water hydrogen-bonded aggregate (Solv-W). For aqueous propanol, the probe is efficiently solvated by Solv-W; the strong interaction of DMSO with W drastically decreases the efficiency of Solv-W in solvating the probe, relative to its precursor solvents. Temperature increases resulted in desolvation of the probes, due to the concomitant reduction in the structured characters of the components of the binary mixtures.

Analysis of response to enteral infusion of levodopa in patients with Parkinson's disease

Objective: We present a new evaluation of levodopa plasma concentrations and clinical effects during duodenal infusion of a levodopa/carbidopa gel (Duodopa ) in 12 patients with advanced Parkinson s disease (PD), from a study reported previously (Nyholm et al, Clin Neuropharmacol 2003; 26(3): 156-163). One objective was to investigate in what state of PD we can see the greatest benefits with infusion compared with corresponding oral treatment (Sinemet CR). Another objective was to identify fluctuating response to levodopa and correlate to variables related to disease progression. Methods: We have computed mean absolute error (MAE) and mean squared error (MSE) for the clinical rating from -3 (severe parkinsonism) to +3 (severe dyskinesia) as measures of the clinical state over the treatment periods of the study. Standard deviation (SD) of the rating was used as a measure of response fluctuations. Linear regression and visual inspection of graphs were used to estimate relationships between these measures and variables related to disease progression such as years on levodopa (YLD) or unified PD rating scale part II (UPDRS II).Results: We found that MAE for infusion had a strong linear correlation to YLD (r2=0.80) while the corresponding relation for oral treatment looked more sigmoid, particularly for the more advanced patients (YLD>18).

Expressão imunohistoquímica do C-MYC na seqüência metaplasia-displasia-adenocarcinoma no esôfago

Introdução e Objetivos: O esôfago de Barrett (BE) desenvolve-se como conseqüência de uma agressão acentuada sobre a mucosa esofágica causada pelo refluxo gastresofágico crônico. É uma lesão precursora e exerce papel importante no desenvolvimento do adenocarcinoma esofágico (ACE). Inúmeras alterações genéticas estão presentes ao longo da transformação tumoral de uma célula, sendo o c-Myc um dos principais genes envolvidos na carcinogênese humana. O objetivo do presente estudo foi determinar a expressão do c-myc em pacientes com EB e com adenocarcinoma esofágico, e avaliar esta prevalência relacionada com a seqüência metaplasia-displasia-adenocarcinoma. Métodos: A expressão da proteína do C-myc foi determinada através da análise imunohistoquímica em quatro grupos diferentes: 31 pacientes com tecido normal, 43 pacientes com EB sem displasia, 11 pacientes com displasia em EB e 37 pacientes com o adenocarcinoma esofágico. O material foi obtido de peças de biópsias ou de ressecção cirúrgica de pacientes atendidos pelo Grupo de Cirurgia de Esôfago, Estômago e Intestino Delgado (GCEEID) do Hospital de Clínicas de Porto Alegre (HCPA) no período de janeiro 1998 a fevereiro 2004. Dados demográficos e endoscópicos (sexo, idade, raça, tamanho hiatal da hérnia e extensão do epitélio colunar esofágico), e as características morfológicas e histopatológicas tumorais (invasão tumoral, comprometimento linfonodal, e diferenciação histológica do tumor) foram analisados. A expressão de c-Myc foi avaliada usando o sistema de escore de imunorreatividade (Immunoreactive Scoring System – ISS). Resultados: Expressão aumentada do c-myc foi encontrada em apenas 9,7% das amostras de epitélio normal, em 37,2% dos pacientes com EB, em 45,5% dos pacientes com displasia e em 73% dos pacientes com adenocarcinoma, com diferença estatística significativa entre os grupos. Nenhuma associação foi identificada quando a expressão do c-Myc foi comparada as características morfológicas e histológicas do tumor ou aos dados endoscópicos. Entretanto, uma correlação linear da expressão do c-myc ao longo da seqüência metaplasia-displasia-adenocarcinoma foi observada. Conclusão: O estudo demonstrou um aumento significativo da expressão do c-Myc no EB, na displasia, e no adenocarcinoma em relação aos controles, bem como uma progressão linear da positividade deste gene ao longo desta seqüência. Estes resultados apontam para um papel importante deste marcador no desenvolvimento do ACE a partir do EB. Esta expressão aumentada do c-Myc em pacientes com EB poderá ajudar a identificar pacientes com risco elevado para o desenvolvimento de adenocarcinoma, contribuindo para um diagnóstico precoce desta doença.

Desenvolvimento de redes de polímeros interpenetrantes (IPN) para a aplicação como eletrólito polimérico

Uma nova rede de polímeros interpenetrantes (IPN) baseada em poliuretana de óleo de mamona e poli(etileno glicol) e poli(metacrilato de metila) foi preparada para ser utilizada como eletrólito polimérico. Os seguintes parâmetros de polimerização foram avaliados: massa molecular do poli(etileno glicol) (PEG), concentração de PEG e concentração de metacrilato de metila. As membranas de IPN foram caracterizadas por calorimetria diferencial de varredura (DSC) e espectroscopia de infravermelho por transformada de Fourier (FT-IR). Os eletrólitos de redes de polímeros interpenetrantes (IPNE) foram preparados a partir da dopagem com sal de lítio através do inchamento numa solução de 10% em massa de LiClO4 na mistura de carbonato de etileno e carbonato de propileno na razão mássica de 50:50. As IPNEs foram caracterizadas por espectroscopia de impedância eletroquímica e Raman. As IPNEs foram testadas como eletrólito polimérico em supercapacitores. As células capacitivas foram preparadas utilizando eletrodos de polipirrol (PPy). Os valores de capacitância e eficiência foram calculados por impedância eletroquímica, voltametria cíclica e ciclos galvonostáticos de carga e descarga. Os valores de capacitância obtidos foram em torno de 90 F.g-1 e eficiência variou no intervalo de 88 a 99%. Os valores de densidade de potência foram superiores a 250 W.kg-1 enquanto que a densidade de energia variou de 10 a 33 W.h.kg-1, dependendo da composição da IPNE. As características eletroquímicas do eletrólito formado pela IPN-LiClO4 (IPNE) foram comparadas aos eletrólitos poliméricos convencionais, tais como poli(difluoreto de vinilideno)-(hexafluorpropileno) ((PVDF-HFP/LiClO4) e poliuretana comercial (Bayer desmopan 385) (PU385/LiClO4). As condutividades na temperatura ambiente foram da ordem de 10-3 S.cm-1. A capacitância da célula utilizando eletrodos de PPy com eletrólito de PVDFHFP foi de 115 F.g-1 (30 mF.cm-2) e 110 F.g-1 (25 mF.cm-2) para a célula com PU385 comparadas a 90 F.g-1 (20 mF.cm-2) para a IPNE. Os capacitores preparados com eletrólito de IPNE apresentaram valores de capacitância inferior aos demais, entretanto provaram ser mais estáveis e mais resistentes aos ciclos de carga/descarga. A interpenetração de duas redes poliméricas, PU e PMMA produziu um eletrólito com boa estabilidade mecânica e elétrica. Um protótipo de supercapacitor de estado sólido foi produzindo utilizando eletrodos impressos de carbono ativado (PCE) e o eletrólito polimérico de IPNE. A técnica de impressão de carbono possui várias vantagens em relação aos outros métodos de manufatura de eletrodos de carbono, pois a área do eletrodo, espessura e composição são variáveis que podem ser controladas experimentalmente. As células apresentaram uma larga janela eletroquímica (4V) e valores da capacitância da ordem de 113 mF.cm-2 (16 F.g-1). Métodos alternativos de preparação do PCE investigados incluem o uso de IPNE como polímero de ligação ao carbono ativado, estes eletrodos apresentaram valores de capacitância similares aos produzidos com PVDF. A influência do número de camadas de carbono usadas na produção do PCE também foi alvo de estudo. Em relação ao eletrólito polimérico, o plastificante e o sal de lítio foram adicionados durante a síntese, formando a IPNGel. As células apresentaram alta capacitância e boa estabilidade após 4000 ciclos de carga e descarga. As membranas de IPN foram testadas também como reservatório de medicamento em sistemas de transporte transdérmico por iontoforese. Os filmes, mecanicamente estáveis, formaram géis quando inchado em soluções saturadas de lidocaina.HCl, anestésico local, em propileno glicol (PG), poli(etileno glicol) (PEG400) e suas misturas. O grau de inchamento em PG foi de 15% e 35% em PEG400. Agentes químicos de penetração foram utilizados para diminuir a resistência da barreira causada pela pele, dentre eles o próprio PG, a 2-pirrolidinona (E1) e a 1-dodecil-2-pirrolidinona (E2). Os géis foram caracterizados por espectroscopia de impedância eletroquímica e transporte passivo e por iontoforese através de uma membrana artificial (celofane). O sistema IPN/ lidocaina.HCl apresentou uma correlação linear entre medicamento liberado e a corrente aplicada. Os melhores resultados de transporte de medicamento foram obtidos utilizando o PG como solvente.

Desempenho do professor das classes de alfabetização funcional: influência da percepção

o presente estudo objetiva levantar, a partir da anãlise das atitudes dos alfabetizadores, a possibilidade de inferências acerca de um certo estilo perceptivo do alfabetizador frente ao MOBRAL e ate que ponto esse estilo afeta o desempenho docente. Pretende,tambem, caracterizar o al fabetizador, apontando a relação entre algumas de suas caracteristicas e suas percepçoes. Trata-se de um estudo de campo, realizado no Municipio do Rio de Janeiro, que apresentaI como amostra, 33,46% da população de professo - res das classes de alfabetização funcional, originadas dos convênios firma dos pelo MOBRAL, no segundo semestre de 1977. Como instrumentos de coleta de dados utilizaram-se formulãrios que foram respondidos pelos 91 sujeitos da pesquisa e seus respectivos supervisores. A avaliação do alfabetizador apresenta-se sob dois enfoques: o do superviior e o dos resultados dos alunos, obtidos nos testes de Leitura, Escrita e Cãlculo. A hipótese substantiva que orienta o estudo - a percepçao do professor das classes de alfabetização funcional afeta o seu desempenho - foi confirmada quanto à avaliação realizada pelo supervisor (correlação li near = 0,43) e infirmada quanto aos resultados dos alunos (correlação li near = 0,10). No que diz respeito às caracteristicas dos alfabetizadores, observa- se que os professores mais novos e os de nivel de escolaridade mais alto foram os que receberam melhores notas do supervisor e apresentaram m~ nor rendimento quanto aos resultados dos alunos. A pesquisa ainda apresenta informações dos professores em relaçao a diferentes aspectos do MOBRAL, destacando-se: o efetivo oferecimento de classes, o perfeito entrosamento entre alfabetizadores e alunos, a falta de discussão do conceito de alfabetização funcional e a necessidade de melhorar o desempenho dos alfabetizadores em relação ã exploração do cartaz gerador e ã utilização do trabalho de grupo. Tudo faz crer que, apesar da diferença de nível de escolaridade (grande incidência dos alfabetizadores com 2Q grau - habilitação magist~ rio) entre professores e alunos, observa-se que ambos se aproximam, apresentando tambem o professor, uma passividade, um conformismo que o faz aceitar a realidade a sua volta, entusiasmar-se e a ela dedicar-se sem, porem, problematizá-la.

Comparison of two extraction methods for evaluation of volatile constituents patterns in commercial whiskeys: Elucidation of the main odour-active compounds

An analytical procedure based on manual dynamic headspace solid-phase microextraction (HS-SPME) method and the conventional extraction method by liquid–liquid extraction (LLE), were compared for their effectiveness in the extraction and quantification of volatile compounds from commercial whiskey samples. Seven extraction solvents covering a wide range of polarities and two SPME fibres coatings, has been evaluated. The highest amounts extracted, were achieved using dichloromethane (CH2Cl2) by LLE method (LLECH2Cl2)(LLECH2Cl2) and using a CAR/PDMS fibre (SPMECAR/PDMS) in HS-SPME. Each method was used to determine the responses of 25 analytes from whiskeys and calibration standards, in order to provide sensitivity comparisons between the two methods. Calibration curves were established in a synthetic whiskey and linear correlation coefficient (r ) were greater than 0.9929 for LLECH2Cl2LLECH2Cl2 and 0.9935 for SPMECAR/PDMS, for all target compounds. Recoveries greater than 80% were achieved. For most compounds, precision (expressed by relative standard deviation, R.S.D.) are very good, with R.S.D. values lower than 14.78% for HS-SPME method and than 19.42% for LLE method. The detection limits ranged from 0.13 to 19.03 μg L−1 for SPME procedure and from 0.50 to 12.48 μg L−1 for LLE. A tentative study to estimate the contribution of a specific compound to the aroma of a whiskey, on the basis of their odour activity values (OAV) was made. Ethyl octanoate followed by isoamyl acetate and isobutyl alcohol, were found the most potent odour-active compounds.

Heterocyclic acetals in Madeira wines

The maturation of Madeira wines usually involves exposure to relatively high temperatures which affect the aroma and flavour composition leading to the formation of the typical and characteristic bouquet of these wines. The formation of heterocyclic acetals (1,3-dioxanes and 1,3-dioxolanes) was investigated in order to determine levels and for possible use as indicators of wine age. The results show a linear correlation of the investigated acetals with wine age but suggest that the acetalization reaction is not particularly affected by the drastic oxidative conditions observed during maturation.

Correlações nos dfa de diversos perfis geológicos. estudo de caso: Bacia de Campos - RJ

This work aims to study the fluctuation structure of physical properties of oil well profiles. It was used as technique the analysis of fluctuations without trend (Detrended Fluctuation Analysis - DFA). It has been made part of the study 54 oil wells in the Campo de Namorado located in the Campos Basin in Rio de Janeiro. We studied five sections, namely: sonic, density, porosity, resistivity and gamma rays. For most of the profiles , DFA analysis was available in the literature, though the sonic perfile was estimated with the aid of a standard algorithm. The comparison between the exponents of DFA of the five profiles was performed using linear correlation of variables, so we had 10 comparisons of profiles. Our null hypothesis is that the values of DFA for the various physical properties are independent. The main result indicates that no refutation of the null hypothesis. That is, the fluctuations observed by DFA in the profiles do not have a universal character, that is, in general the quantities display a floating structure of their own. From the ten correlations studied only the profiles of density and sonic one showed a significant correlation (p> 0.05). Finally these results indicate that one should use the data from DFA with caution, because, in general, based on geological analysis DFA different profiles can lead to disparate conclusions

Direct determination of Cu, Cd, Ni and Pb in aquatic humic substances by graphite furnace atomic absorption spectrometry

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Correlations between thermal environment and egg quality of two layer commercial strains

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

HIV/AIDS e estilo de vida: parâmetros imunológicos, virológicos, síndrome lipodistrófica e sua relação com a prática de exercícios

This descriptive study aimed to investigate the relationship between expression of immunological (TCD4 +) and virological (viral load) parameters, lipodystrophy syndrome and lifestyle variables of people living with HIV who underwent a program of physicalexercise. Initially, the sample was composed by 17 persons, recorded at the Department of Giselda Trigueiro Hospital Care (GTH), Natal-RN . With the passing of the stages of intervention (physical training program- PTP) the number of participants has changed (17, 9, 8 and 7) as the training phases (I, II, III and IV). Data collected were on total cholesterol, High Density Lipoprotein (HDL) and triglycerides. The % fat (% F), body mass index (BMI), waist-hip ratio (WHR), lean mass (LM), central fat (BF), total (TF) and peripheral (PF), weight and height were used to measure the morphological parameters. For control of variables (TCD4 +, viral load, Triglycerides, Cholesterol, HDL), the information contained in the blood tests every four months were investigated. After Phase I and II, it was used a structured interview. Then sampling was carried out considering the pre-and post-tests 1, 2, 3 and 4 (after 16, 32, 48 and 64 weeks of training, respectively). Daily, the intensity of the work was checked by the scale of perceived exertion for exercises adapted to resistance34. Procedures used were descriptive statistics (dispersion, absolute and relative frequencies, means, standard deviations and minimum and maximum values) as well as Spearman linear correlation adopting a significance level of p ≤ 0.05. Positive changes were observed for TCD4 + and viral load in all phases of the PTP. For the morphological components, the loss of central subcutaneous fat (CSF) and total subcutaneous fat (TSF) for both sexes and the decrease in % BF among women were the most dramatic results after the training phase I. For men, results were more significant to % F and LM in Phases I and II and peripheral subcutaneous fat (PSF) declined in all phases of the exercise. As for women, results were more expressive for % F and TM in the phases I and II and the PSF decreased in all phases of the exercise. Whereas for women, the waist/hip ratio (WCQ) and 0% F decreased and showed a positive association with triglycerides (WHR r * 0.82, p 0.042, r 0.88 TSF *, p 0.019 and r 1.00 ** CSF, p <0.001) and among men with limb subcutaneous fat (LSF)* r 0.65, p 0.029). The PTP provided improvement in the health, self-esteem and quality of life, proving to be a possible strategy to positively influence the expression of immunological parameters (TCD4 +) and virological (viral load) and morphological components of people living with HIV causing no deleterious effects in these parameters

Accumulation of six metals in the mangrove crab Ucides cordatus (Crustacea: Ucididae) and its food source, the red mangrove Rhizophora mangle (Angiosperma: Rhizophoraceae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação de um método de cromatografia em fase gasosa head space e estudo da estabilidade do etanol em amostras de sangue

The ethanol is the most overused psychoactive drug over the world; this fact makes it one of the main substances required in toxicological exams nowadays. The development of an analytical method, adaptation or implementation of a method known, involves a process of validation that estimates its efficiency in the laboratory routine and credibility of the method. The stability is defined as the ability of the sample of material to keep the initial value of a quantitative measure for a defined period within specific limits when stored under defined conditions. This study aimed to evaluate the method of Gas chromatography and study the stability of ethanol in blood samples, considering the variables time and temperature of storage, and the presence of preservative and, with that check if the conditions of conservation and storage used in this study maintain the quality of the sample and preserve the originally amount of analyte present. Blood samples were collected from 10 volunteers to evaluate the method and to study the stability of ethanol. For the evaluation of the method, part of the samples was added to known concentrations of ethanol. In the study of stability, the other side of the pool of blood was placed in two containers: one containing the preservative sodium fluoride 1% and the anticoagulant heparin and the other only heparin, was added ethanol at a concentration of 0.6 g/L, fractionated in two bottles, one being stored at 4ºC (refrigerator) and another at -20ºC (freezer), the tests were performed on the same day (time zero) and after 1, 3, 7, 14, 30 and 60 days of storage. The assessment found the difference in results during storage in relation to time zero. It used the technique of headspace associated with gas chromatography with the FID and capillary column with stationary phase of polyethylene. The best analysis of chromatographic conditions were: temperature of 50ºC (column), 150ºC (jet) and 250ºC (detector), with retention time for ethanol from 9.107 ± 0.026 and the tercbutanol (internal standard) of 8.170 ± 0.081 minutes, the ethanol being separated properly from acetaldehyde, acetone, methanol and 2-propanol, which are potential interfering in the determination of ethanol. The technique showed linearity in the concentration range of 0.01 and 3.2 g/L (0.8051 x + y = 0.6196; r2 = 0.999). The calibration curve showed the following equation of the line: y = x 0.7542 + 0.6545, with a linear correlation coefficient equal to 0.996. The average recovery was 100.2%, the coefficients of variation of accuracy and inter intra test showed values of up to 7.3%, the limit of detection and quantification was 0.01 g/L and showed coefficient of variation within the allowed. The analytical method evaluated in this study proved to be fast, efficient and practical, given the objective of this work satisfactorily. The study of stability has less than 20% difference in the response obtained under the conditions of storage and stipulated period, compared with the response obtained at time zero and at the significance level of 5%, no statistical difference in the concentration of ethanol was observed between analysis. The results reinforce the reliability of the method of gas chromatography and blood samples in search of ethanol, either in the toxicological, forensic, social or clinic

FERRITINA: intervalos de referência para adultos no Estado do Rio Grande do Norte

Ferritin is a protein composed of heavy and light chains, non-covalently linked and which accommodates, in its core, thousands of atoms of iron. Furthermore, this protein represents the stock of iron in the body and it is characterized as an acute marker and predictor of diseases, such as iron deficiency anemia, hereditary hemochromatosis and others. Considering the variability of reference values and the analytical methods currently available, the aim of this work was to propose 95% confidence intervals for adults in the State of Rio Grande do Norte, Brazil, after determining the average concentration of serum ferritin for both sexes, beyond its correlation with the age. We analyzed 385 blood samples, collected by venipuncture from individuals residing in the State, after 12-14 hours of fast. The populational sample had 169 men and 216 women between 18-59 years old, which filled a questionnaire on socioeconomic, food habits and accounts about previous and current diseases. The sample collections were itinerant and the results of erythrogram, fasting glucose, alanine aminotransferase, aspartate aminotransferase, γ-glutamyl transferase, urea, creatinine, leukocyte count and platelets, beyond C-reactive protein, were issued to each participant, so that, after selection of the apparently healthy individuals, the dosage of serum ferritin was carried out. Statistical analysis was performed using the softwares SPSS 11.0 Windows version, Epi Info 3.3.2 and Graf instant pad (version 3.02), and the random population sample was single (finite population), for which the test of linear correlation and diagram of dispersion were also made. After selection of individuals and determination of serum ferritin, the most discrepant outliers were disregarded (N = 358, Men = 154/Women = 207) and the average value determined for the masculine sex individuals was 167,18 ng / dL; for the feminine sex individuals, the average value obtained was 81,55 ng / dL. Moreover, we found that 25% of men had values < 90,30 ng / dL; 50% ≤ 156,25 ng / dL and 75% ≤ 229,00 ng / dL. In the group of women, 25% had values < 38,80 ng / dL; 50% ≤ 65,00 ng / dL and 75% ≤ 119,00 ng / dL. Through the correlation coefficient (r = 0,23 with p = 0,003), it is possible to suggest the existence of positive linear correlation between age and serum ferritin for men. The correlation coefficient for women (r = 0,16 with p = 0,025) also confirms the existence of positive linear correlation between serum ferritin and age. Considering the analysis carried out and specific methods corroborating with the proposed benchmarks, we concluded that the average value found for men is higher than that found for women. Furthermore, this scenario rises with age for both sexes, and the 95% confidence intervals obtained were 74 ng/dL ≤ μ ≤ 89 ng/dL and 152ng/dL ≤ μ ≤183ng/dL for the feminine and masculine sex individuals respectively