Facial thermal and blood perfusion patterns of human emotions: Proof-of-Concept.

In this work, a preliminary study of proof-of-concept was conducted to evaluate the performance of the thermographic and blood perfusion data when emotions of positive and negative valence are applied, where the blood perfusion data are obtained from the thermographic data. The images were obtained for baseline, positive, and negative valence according to the protocol of the Geneva Affective Picture Database. Absolute and percentage differences of average values of the data between the valences and the baseline were calculated for different regions of interest (forehead, periorbital eyes, cheeks, nose and upper lips). For negative valence, a decrease in temperature and blood perfusion was observed in the regions of interest, and the effect was greater on the left side than on the right side. In positive valence, the temperature and blood perfusion increased in some cases, showing a complex pattern. The temperature and perfusion of the nose was reduced for both valences, which is indicative of the arousal dimension. The blood perfusion images were found to be greater contrast; the percentage differences in the blood perfusion images are greater than those obtained in thermographic images. Moreover, the blood perfusion images, and vasomotor answer are consistent, therefore, they can be a better biomarker than thermographic analysis in identifying emotions.

Spatiotemporal Bayesian modeling of the risk of congenital syphilis in São Paulo, SP, Brazil.

The aim of this study is to analyze the spatiotemporal risk of congenital syphilis (CS) in high-prevalence areas in the city of São Paulo, SP, Brazil, and to evaluate its relationship with socioeconomic, demographic, and environmental variables. An ecological study was conducted based on secondary CS data with spatiotemporal components collected from 310 areas between 2010 and 2016. The data were modeled in a Bayesian context using the integrated nested Laplace approximation (INLA) method. Risk maps showed an increasing CS trend over time and highlighted the areas that presented the highest and lowest risk in each year. The model showed that the factors positively associated with a higher risk of CS were the Gini index and the proportion of women aged 18-24 years without education or with incomplete primary education, while the factors negatively associated were the proportion of women of childbearing age and the mean per capita income.

Perseverative Cognition as a Mediator Between Personality Traits and Blood Pressure.

Purpose: Several authors link hypertension with psychological dispositions such as stress, personality, and anxiety, some propose that stress is not enough to explain arterial hypertension and others propose the perseverative cognition model to explain. The aim of this study was to relate personality traits and blood pressure profile of a group of workers, examining the results of perseverative cognition as a possible mediating variable concerning blood pressure. Patients and Methods: Cross-sectional design study, with a sample of 76 employees of a Colombian university. The NEO-FFI, RRS, and blood pressure measurement instruments were applied; data were reviewed through correlation and mediation analysis. Results: We found evidence of association between neuroticism and perseverative cognition (rho=0.42 with brooding; rho =0.32 with reflection), but no evidence about mediation of perseverative cognition between personality and blood pressure. Conclusion: It is necessary to keep researching the mechanisms related to the occurrence of hypertension.

Hospitalizations and mortality of patients with heart failure in the COVID-19 era in Peru.

Objectives: The worldwide heart failure (HF) prevalence is 8.52 per 1000 inhabitants, with a global economic burden of 346.17 billion dollars. With the COVID-19 pandemic, the focus of medical care has changed to treating the morbidity and mortality of patients with COVID-19 and reducing medical procedures or visits to patients with HF, with the impact being greater in low- and middle-income countries. Methods: We performed an interrupted time series analysis of HF to determine the changes in the trend of hospitalizations and in-hospital mortality of HF patients before and after the mandatory lockdown in Peru. Results: A total of 18,514 adults were included in the analysis. Monthly hospital admissions immediately decreased by 599 (95% confidence interval [CI]: 113 to 1085) and the difference in slope before and after the lockdown was 6.4 hospital admissions (95% CI: -4 to 18). In-hospital mortality increased by 18% (95% CI: -8%-43%) and the difference in slope before and after the lockdown was -0.3% (95% CI: -0.9%-0.25%). Conclusions: There was a reduction in hospitalizations and an increase in the in-hospital mortality of patients with HF before and after the mandatory lockdown due to the COVID-19 pandemic in Peru.

Bioactive Peptides: Synthesis, Properties, and Applications in the Packaging and Preservation of Food.

Bioactive peptides are protein fragments which have a positive impact on the functions and conditions of living beings. Peptides have shown several useful properties for human health, including antimicrobial, antifungal, antiviral, and antitumor activities. These compounds are produced by almost all species of life. However, they are produced in limited quantities in nature. As a result, researchers have tried to synthesize bioactive peptides to study their properties and applications in various areas. Among their applications in food preservation, peptides have been incorporated into packaging materials. This review begins with a brief description of the methods used for the synthesis, purification, and characterization of peptides. Also, the main bioproperties and mechanisms of action of peptides are discussed. Finally, some applications of peptides are presented, especially their use in active packaging, their effects on the polymeric matrix, and peptide migration.

Ichthyosis: case report in a Colombian man with genetic alterations in ABCA12 and HRNR genes.

BACKGROUND: Ichthyosis is a heterogeneous group of diseases caused by genetic disorders related to skin formation. They are characterized by generalized dry skin, scaling, hyperkeratosis and frequently associated with erythroderma. Among its different types, harlequin ichthyosis (HI) stands out due to its severity. HI is caused by mutations in the ABCA12 gene, which encodes essential proteins in epidermal lipid transport, and it helps maintain the homeostasis of the stratum corneum of the epidermis. However, due to the wide spectrum of genetic alterations that can cause ichthyosis, holistic medical care, and genetic studies are required to improve the diagnosis and outcomes of these diseases. CASE PRESENTATION: Here, we presented the case of a 19 years old male patient who was a premature infant and exhibited clinical features consistent with HI, including bright yellow hyperkeratotic plates with erythematous fissures that covered his entire body like a collodion baby. Currently, he exhibited erythroderma, photosensitivity, ectropion, auricular pavilion alterations, and musculoskeletal disorders, such as equinovarus feet, fingers, hands, and hypoplastic feet with contractures in flexion and marked difficulty in fine motor skills. In addition, he presented dyschromatopsia, Achilles reflex hyporeflexia, slight speech, dental alteration and deficient cognitive performance. After the genetic sequencing, variants were found in ABCA12 and HRNR which are related to several skin diseases, including ichthyosis. CONCLUSIONS: Although in clinical practice, ichthyosis is a common entity, a severe type of ichthyosis is presented, highlighting the importance of appropriate genetic diagnosis, given the broad spectrum of genetic alterations with similar phenotypic and clinical characteristics. These pathologies must be known to guarantee initial support measures to prevent complications and offer multidisciplinary management to those patients.

Reproducibility of immunostaining quantification and description of a new digital image processing procedure for quantitative evaluation of immunohistochemistry in pathology.

Quantification of immunostaining is a widely used technique in pathology. Nonetheless, techniques that rely on human vision are prone to inter- and intraobserver variability, and they are tedious and time consuming. Digital image analysis (DIA), now available in a variety of platforms, improves quantification performance: however, the stability of these different DIA systems is largely unknown. Here, we describe a method to measure the reproducibility of DIA systems. In addition, we describe a new image-processing strategy for quantitative evaluation of immunostained tissue sections using DAB/hematoxylin-stained slides. This approach is based on image subtraction, using a blue low pass filter in the optical train, followed by digital contrast and brightness enhancement. Results showed that our DIA system yields stable counts, and that this method can be used to evaluate the performance of DIA systems. The new image-processing approach creates an image that aids both human visual observation and DIA systems in assessing immunostained slides, delivers a quantitative performance similar to that of bright field imaging, gives thresholds with smaller ranges, and allows the segmentation of strongly immunostained areas, all resulting in a higher probability of representing specific staining. We believe that our approach offers important advantages to immunostaining quantification in pathology.

Effect of roughness of zirconia and titanium on fibroblast adhesion.

The aim of this study was to investigate the adhesion (4 and 24 h) and the morphology of fibroblast Balb/c 3T3 seeded onto polystyrene, partially stabilized (ZrO(2)Y(2)O(3)), stabilized zirconia ceramic (3YTZP), and pure titanium (Ti, grade 2). Initial cell adhesion (4 h) was greater (P < 0.05, analysis of variance and Tukey's Multiple Comparisons Test) onto ZrO(2)Y(2)O(3) and polystyrene than in Ti and 3YTZ. After 24 h, the number of adhered cells was similar between the biomaterials tested, but smaller than onto polystyrene (P < 0.05). Cells were more spread onto glass surface after 4 h, but after 24 h, the morphology and density of the cells were similar in all groups (SEM). Profilometry showed distinct Ra values for each material: glass coverslips and ZrO(2)Y(2)O(3) (0.09 microm), Ti (0.88 microm), and 3YTZP (30.93 microm). It was concluded that ZrO(2)Y(2)O(3) promoted the best initial adhesion, thus indicating that surfaces with Ra values smaller than 0.1 microm could be more favorable to initial adhesion.

Perception of risk as a mediator between personality and perception of health: test of a model.

BACKGROUND: This research article addresses the relationships among personality, risk perception, and health perception. The personality construct has been one of the main topics of research in psychology throughout history and is understood as the set of traits or cognitive, affective and behavioral characteristics that an individual possesses. Important relationships have been found that show the impact of personality on people's health as well as the impact of health conditions on the configuration of personality. This research investigates the perception of risk as a mediating trait between personality and perception of health. MATERIALS AND METHODS: To achieve this, a cross-sectional study was conducted in which 398 Colombians from all regions of the country were evaluated. The NEO Five Factor Inventory (NEO-FFI), The General Health Questionnaire (GHQ-12) and Health Risk Perception Test (HRPT) tests were used. RESULTS: The data were analyzed with multiple regression and path analysis. The findings using multiple regression show that neuroticism and the personal meaning of risk affect the perception of health; however, using path analysis, model fit with the proposed model was not achieved with no mediator effect of perception of risk. CONCLUSION: It is necessary to focus on relationships between neuroticism and perception of health in future research.

Sintomatología de depresión y ansiedad en estudiantes universitarios colombianos durante la pandemia covid-19

La sintomatologia de depresión y ansiedad, aunque varía en prevalencia e intensidad, se ha reportado en casi todos los estudios sobre afectaciones psicológicas en estudiantes universitarios durante la pandemia del COVID-19. Objetivo: Evaluar los niveles de depresión y ansiedad en una muestra de estudiantes universitarios, identificar los principales síntomas afectivos, fisiológicos, cognitivos y somáticos, y analizar los resultados en función de algunas variables sociodemográficas de interés. Material y Método: Se desarrolló una investigación no experimental, con enfoque cuantitativo, de nivel descriptivo y corte transversal en la que se incluyeron 1.004 estudiantes universitarios (77% mujeres) matriculados en tres Instituciones de Educación Superior (IES) (dos privadas y una pública) en Medellín. Para la recolección de información se utilizaron la Escala de Autoevaluación de la Depresión de Zung y la Escala de Ansiedad Autocalificada de Zung. Resultados: El 47,7% de la muestra presentó sintomatología depresiva, pero solo el 26,1% manifestó sintomatología de ansiedad. Hubo diferencias en la ansiedad y la depresión en cuanto al sexo y otras variables sociodemográficas. El análisis de frecuencias de respuestas a los ítems de los instrumentos permitió conocer cuáles son los síntomas de depresión y ansiedad más frecuentes en los participantes. Conclusiones: Las modificaciones sociales y educativas generadas por la pandemia han impactado más a las mujeres jóvenes con edades entre los 16 y los 25 años, quienes han presentado dificultad para realizar actividades que previamente hacían, dificultad para pensar o concentrarse, anhedonia, pérdida del deseo sexual, sensación de inutilidad, insatisfacción con la propia vida e irritabilidad, entre otros síntomas.

Symptomatology of depression and anxiety, although varying in prevalence and intensity, has been reported in almost all studies on psychological affectations among university students during the COVID-19 pandemic. Objective: To evaluate the levels of depression and anxiety in a sample consisting of university students, to identify the main affective, physiological, cognitive and somatic symptoms, and to analyze the results in terms of some sociodemographic variables of interest. Material and Method: A non-experimental, quantitative, descriptive, cross-sectional research was carried out with 1004 university students (77% female) enrolled in three higher education institutions (two private and one public) in Medellin, Colombia. The Zung Depression Self-Assessment Scale and the Zung Self-Rated Anxiety Scale were used for data collection. Results: 47.7% of the sample presented depressive symptomatology, but only 26.1% manifested anxiety symptomatology. There were differences in anxiety and depression in terms of sex and other sociodemographic variables. The analysis of frequencies of responses to the instruments' items show which are the most frequent symptoms of depression and anxiety among the participants. Conclusions: The social and educational changes caused by the pandemic have had a greater impact on young women aged between 16 and 25 years, who have presented difficulty in performing activities they previously did, difficulty in thinking or concentrating, anhedonia, loss of sexual desire, feeling of uselessness, dissatisfaction with their own lives, and irritability, among other symptoms.

A sintomatologia da depressão e da ansiedade, embora variando em prevalência e intensidade, tem sido relatada em quase todos os estudos sobre afetações psicológicas em estudantes universitários durante a pandemia da COVID-19. Objetivo: Avaliar os níveis de depressão e ansiedade em uma amostra de estudantes universitários, identificar os principais sintomas afetivos, fisiológicos, cognitivos e somáticos, e analisar os resultados de acordo com algumas variáveis sociodemográficas de interesse. Material e Método: Foi realizada uma pesquisa não experimental, com uma abordagem quantitativa, nível descritivo e corte transversal na qual participaram 1004 estudantes universitários (77% mulheres) matriculados em três instituições de ensino superior (duas privadas e uma pública) em Medellín, Colômbia. A Escala de Auto-Avaliação de Depressão Zung e a Escala de Auto-Avaliação de Ansiedade Zung foram usadas para a coleta de dados. Resultados: 47,7% da amostra apresentou sintomas depressivos, mas apenas 26,1% manifestaram sintomas de ansiedade. Houve diferenças na ansiedade e depressão em termos de sexo e outras variáveis sociodemográficas. A análise da freqüéncia das respostas aos itens dos instrumentos permitiu saber quais são os sintomas mais freqüentes de depressão e ansiedade entre os participantes. Conclusões: As mudanças sociais e educacionais geradas pela pandemia tiveram um impacto maior nas mulheres jovens entre 16 e 25 anos de idade, que apresentaram dificuldade em realizar atividades que antes realizavam, dificuldade em pensar ou se concentrar, anedonia, perda do desejo sexual, sensação de inutilidade, insatisfação com sua própria vida, irritabilidade, entre outros sintomas.

Estudio exploratorio sobre la ansiedad por la salud en universitarios colombianos durante el confinamiento por la pandemia del COVID-19 en el segundo semestre del 2020 / Exploratory study on health anxiety in Colombian university students during COVID-19 pandemic confinement in the second semester of 2020

Introducción: La ansiedad por la salud es un estado psicológico caracterizado por cierto tipo de creencias, emociones y actitudes hacia la posibilidad de contraer una enfermedad. La ansiedad por la salud ha sido considerada un mediador de la respuesta psicológica ante la pandemia generada por el COVID-19. Objetivo: Determinar el nivel de ansiedad por la salud de una muestra de estudiantes universitarios colombianos, discriminando y comparando en función de ciertas variables sociodemográficas, y describir sus principales características durante el confinamiento social en el segundo semestre del 2020. Metodología: Se realizó un estudio cuantitativo, no experimental, de nivel descriptivo y corte transversal en una muestra de 1004 estudiantes de pregrado de 3 instituciones de educación superior de la ciudad de Medellín. Se utilizó el Inventario Breve de Ansiedad por la Salud. Resultados: El valor de la media para la ansiedad por la salud estuvo por encima del valor reportado por otros estudios. Se encontraron altos porcentajes de preocupación por la salud (39,64 %), consciencia del malestar/dolor (63,3 %), miedo de tener una enfermedad grave (20,01 %), interés por las sensaciones o cambios corporales (68,92 %), riesgo de padecer una enfermedad grave (30,33 %) y consecuencias sobre la vida (35,75 %). No se encontraron diferencias estadísticamente significativas en ninguna de las comparaciones entre grupos. Conclusiones: La preocupación por la salud y la ansiedad durante las epidemias/pandemias pueden tener un impacto psicológico importante, además de estar relacionadas con un comportamiento preventivo ineficaz y tener consecuencias adversas en el largo plazo.

Introduction: Health anxiety is a psychological state characterized by certain types of beliefs, emotions, and attitudes toward the possibility of contracting a disease. Health anxiety has been considered a mediator of the psychological response to the pandemic generated by COVID-19. Objectives: To determine the level of health anxiety in a sample of Colombian university students, discriminating and comparing according to certain sociodemographic variables, and to describe the main during social confinement between August and November 2020. Methodology: A quantitative, non-experimental, descriptive, cross-sectional study was conducted in a sample of 1004 undergraduate students from three higher education institutions in the city of Medellin. The Short Health Anxiety Inventory - SHAI was used. Results: The mean value for health anxiety was above the value reported by other studies. High percentages of health concern (39.64 %), awareness of discomfort/pain (63.3 %), fear of having a serious illness (20.01 %), interest in bodily sensations or changes (68.92 %), risk of having a serious illness (30.33 %) and consequences on life (35.75 %) were found. No statistically significant differences were found in any of the comparisons between groups. Conclusions: Health concerns and anxiety during with epidemics/pandemics can have a significant psychological impact, as well as being related to ineffective preventive behavior and having adverse long-term consequences.

Microstructure of Monoplacophora (Mollusca) shell examined by low-voltage field emission scanning electron and atomic force microscopy.

The shell of Micropilina arntzi (Mollusca: Monoplacophora), a primitive molluscan class, was examined by using field emission scanning electron microscopy (FESEM) at low voltage and atomic force microscopy (AFM). The use of these two techniques allowed the observation of fine details of Micropilina arntzi shell and contributed to bring new features concerning the study of molluscan shell microtexture. Imaging with low-voltage FESEM provided well-defined edge contours of shell structures, while analyzing the sample with AFM gave information about the step height of stacked internal structures as well as the dimension of the particles present in their surface at a nanometric level. The shell microstructure of Monoplacophora species presents different patterns and may be a taxonomic implication in the systematic studies of the group.

Neuroanatomic Correlates of Anomia: A Scoping Review / Correlatos neuroanatómicos de la anomia: révisions de tema

Abstract Anomia is the inability to access the lexicon of names, it is one of the most common symptoms of aphasia, but it often appears as a symptom of other disorders and diseases such as Alzheimer's. There are several studies on the anatomical bases of anomie, but they are not conclusive. The objective of this study is to identify, compile and analyze investigations that relate neuroanatomical areas with anomie. We conducted a scoping review and we selected ten articles from scientific databases (EBSCOhost and Science Direct) published during the period 2009 - 2016. It was found that there are different areas related to the denomination processes according to the phase of presentation of the anomie: before and after an intervention. 1n the previous moment there are the temporary and frontal gyrus in the left hemisphere, while after intervention they find activation in the temporal gyrus, precuneus, supramarginal gyrus of the right hemisphere.

Resumen La anomia es la incapacidad para acceder al léxico de nombres, es uno de los síntomas más comunes de las afasias, pero muchas veces se presenta como síntoma de otros trastornos y enfermedades como el Alzheimer. Existen diversos estudios sobre las bases anatómicas de la anomia, pero no son concluyentes. El objetivo de este estudio es identificar, compilar y analizar investigaciones que relacionen las áreas neuroanatómicas con la anomia. Realizamos un estudio de revisión focalizada (scoping review) y seleccionados diez artículos de bases de datos científicas (EBSCOhost y Science Direct) publicados durante el periodo 2009-2016. Se encontró que hay diferentes áreas relacionadas a los procesos de denominación de acuerdo a la fase de presentación de la anomia: antes y después de una intervención. En el momento previo se encuentran los giros temporales y frontales en el hemisferio izquierdo, mientras que después de una intervención se encuentra activación de los giros temporales, el precuneus, y el giro supramarginal en el hemisferio derecho.

Estratégia de implantação de aplicativo para prescrição de enfermagem / Implementation strategy of application for nursing prescription

Objetivo: relatar a experiência do COIISAE na implantação do módulo "Prescrição de Enfermagem", cujas potencialidades qualificam a práxis de Enfermagem nos serviços geridos pela empresa. Método: estudo descritivo, tipo relato de experiência, realizado em um hospital universitário. Resultados: a implantação ocorreu por meio das seguintes fases: 1) Diagnóstico estratégico (visão dos cenários presentes e futuros); 2) Plano estratégico (objetivos estratégicos); 3) Iniciativa estratégica (desdobramentos de objetivos estratégicos); 4) Priorização das iniciativas 2015/2016; 5) Execução e acompanhamento. Conclusão: a acessibilidade da ferramenta demonstrou-se favorável para realizar as prescrições de Enfermagem, entretanto, cumpre ressaltar a responsabilidade do enfermeiro ao manter atualizada a prescrição.(AU)

Mercury-selenium relationships in liver of Guiana dolphin: the possible role of Kupffer cells in the detoxification process by tiemannite formation.

Top marine predators present high mercury concentrations in their tissues as consequence of biomagnification of the most toxic form of this metal, methylmercury (MeHg). The present study concerns mercury accumulation by Guiana dolphins (Sotalia guianensis), highlighting the selenium-mediated methylmercury detoxification process. Liver samples from 19 dolphins incidentally captured within Guanabara Bay (Rio de Janeiro State, Brazil) from 1994 to 2006 were analyzed for total mercury (THg), methylmercury (MeHg), total organic mercury (TOrgHg) and selenium (Se). X-ray microanalyses were also performed. The specimens, including from fetuses to 30-year-old dolphins, comprising 8 females and 11 males, presented high THg (0.53-132 µg/g wet wt.) and Se concentrations (0.17-74.8 µg/g wet wt.). Correlations between THg, MeHg, TOrgHg and Se were verified with age (p<0.05), as well as a high and positive correlation was observed between molar concentrations of Hg and Se (p<0.05). Negative correlations were observed between THg and the percentage of MeHg contribution to THg (p<0.05), which represents a consequence of the selenium-mediated methylmercury detoxification process. Accumulation of Se-Hg amorphous crystals in Kupffer Cells was demonstrated through ultra-structural analysis, which shows that Guiana dolphin is capable of carrying out the demethylation process via mercury selenide formation.

Revisión sistemática del inventario multifásico de personalidad de Minnesota-mmpi / Systematic review of the Minnesota multiphasic personality inventory - mmpi

El presente artículo busca establecer la vigencia y aplicabilidad del Inventario Multifásico de Personalidad de Minnesota. Para dicho efecto se realizó un estudio de revisión sistemática en donde se encontraron 452 artículos que cumplían con los criterios de inclusión de la investigación en el periodo 2000-2010, no obstante se determinó tomar una muestra proporcional del 10% por cada uno de los años encontrados, quedando en total 46 artículos. Se encuentra un uso constante del instrumento, en donde existen múltiples investigaciones en diversas áreas. La prueba obtiene buenas propiedades psicométricas, además de estar avalada por varias revisiones sistemáticas. Se discute el uso dado a la prueba, en donde se obtiene evidencia amplia de su utilidad, así como también se discute que los análisis del instrumento sean en muchas investigaciones mediante clústeres.

This paper seeks to establish the validity and enforceability of Minnesota Multiphasic Personality Inventory. To this end, a systematic literature review was performed. 452 papers that met the inclusion criteria of research in 2000-2010 were found. However we determined to use a proportional sample of 10% for each years, leaving a total of 46 articles. We found a constant use of the instrument, with research being done in various areas. The test has good psychometric properties, in addition to being endorsed by several other systematic reviews. We discuss the use made of the evidence, and we find that the instrument has broad utility, and also discuss the analysis of the instrument in many studies through clustering.

Ultrasensitive thermal lens spectroscopy of water.

A recently developed dual-beam configuration that optimizes the thermal lens technique has been used to obtain the absorption spectrum of pure water from 350 to 528 nm. Our results indicate the minimum linear absorption coefficient smaller than 2 x 10(-5) cm(-1) between 360 and 400 nm. This value is lower than previous literature data, and it is blueshifted. Absorption coefficients as small as 2 x 10(-7) cm(-1) can be measured for water using 1 W of excitation power. A detection limit of approximately 6 x 10(-9) cm(-1)(P=1 W) for CCl(4) was estimated, which represents, to the best of our knowledge, the highest sensitivity obtained in small absorption measurements in liquids.

Antimicrobial and aromatic edible coating on fresh-cut pineapple preservation / Revestimento comestível antimicrobiano e aromático na conservação de abacaxi minimamente processado

The present research aimed to develop an edible coating incorporated with mint essential oil, evaluate its effectiveness in inhibiting in vitro microbial development, and improve both quality and shelf-life of fresh-cut pineapple. Mint essential oil-containing edible coatings showed in vitro antimicrobial efficiency against Escherichia coli and Salmonella Enteritidis. Titratable acidity, pH, and texture were not affected (P>0.05) by coating or storage time. Mass loss was not higher than 1.0% after the 6th day of storage. No effect of storage time and coating on total soluble solids was observed. Mint essential oil-containing coatings inhibited the growth of yeasts and molds in fresh-cut pineapple. Compared to uncoated and control-coated samples, mint essential oil-containing coatings lessened psychrotrophic bacteria counts throughout storage. Counts of thermotolerant coliforms were not higher than 3.0MPN·g-1 in all treatments, whereas no Salmonella sp. was detected during the 6-day storage. Mint essential oil provided a strong flavor to the fruit, as shown by sensory evaluations.

O objetivo deste trabalho foi desenvolver um revestimento comestível incorporado com óleo essencial de hortelã, bem como avaliar sua eficiência antimicrobiana in vitro e em abacaxi minimamente processado. Revestimentos contendo óleo essencial de hortelã mostraram eficiência antimicrobiana in vitro contra Escherichia coli e Salmonella Enteritidis. O pH, a acidez titulável e a textura não foram afetadas (P>0.05) pelos tratamentos durante o armazenamento. A perda de massa dos abacaxis de todos os tratamentos não ultrapassou 1.0% após 6 dias de armazenamento. O tempo e os diferentes revestimentos não afetaram (P>0,05) o teor de sólidos solúveis totais dos abacaxis. Revestimentos contendo óleo essencial de hortelã foram capazes de inibir o crescimento de fungos e leveduras em abacaxi minimamente processado, quando comparado aos frutos sem revestimento e com revestimento controle. Frutos com revestimento contendo óleo essencial de hortelã apresentaram menor contagem de psicrotróficos no final do armazenamento. A contagem de coliformes termotolerantes foi menor que 3.0NMP·g-1 para todos os tratamentos e não foi detectada presença de Salmonella sp. durante o período de armazenamento. A presença de óleo essencial de hortelã conferiu forte sabor aos abacaxis.