RESUMEN
Objective.Current wearable respiratory monitoring devices provide a basic assessment of the breathing pattern of the examined subjects. More complex monitoring is needed for healthcare applications in patients with lung diseases. A multi-sensor vest allowing continuous lung imaging by electrical impedance tomography (EIT) and auscultation at six chest locations was developed for such advanced application. The aims of our study were to determine the vest's capacity to record the intended bio-signals, its safety and the comfort of wearing in a first clinical investigation in healthy adult subjects.Approach.Twenty subjects (age range: 23-65 years) were studied while wearing the vests during a 14-step study protocol comprising phases of quiet and deep breathing, slow and forced full expiration manoeuvres, coughing, breath-holding in seated and three horizontal postures. EIT, chest sound and accelerometer signals were streamed to a tablet using a dedicated application and uploaded to a back-end server. The subjects filled in a questionnaire on the vest properties using a Likert scale.Main results.All subjects completed the full protocol. Good to excellent EIT waveforms and functional EIT images were obtained in 89% of the subjects. Breathing pattern and posture dependent changes in ventilation distribution were properly detected by EIT. Chest sounds were recorded in all subjects. Detection of audible heart sounds was feasible in 44%-67% of the subjects, depending on the sensor location. Accelerometry correctly identified the posture in all subjects. The vests were safe and their properties positively rated, thermal and tactile properties achieved the highest scores.Significance.The functionality and safety of the studied wearable multi-sensor vest and the high level of its acceptance by the study participants were confirmed. Availability of personalized vests might further advance its performance by improving the sensor-skin contact.
Asunto(s)
Grabaciones de Sonido , Dispositivos Electrónicos Vestibles , Adulto , Humanos , Adulto Joven , Persona de Mediana Edad , Anciano , Voluntarios Sanos , Pulmón/diagnóstico por imagen , Monitoreo Fisiológico , Impedancia Eléctrica , Tomografía/métodosRESUMEN
Objective. In this paper, an automated stable tidal breathing period (STBP) identification method based on processing electrical impedance tomography (EIT) waveforms is proposed and the possibility of detecting and identifying such periods using EIT waveforms is analyzed. In wearable chest EIT, patients breathe spontaneously, and therefore, their breathing pattern might not be stable. Since most of the EIT feature extraction methods are applied to STBPs, this renders their automatic identification of central importance.Approach. The EIT frame sequence is reconstructed from the raw EIT recordings and the raw global impedance waveform (GIW) is computed. Next, the respiratory component of the raw GIW is extracted and processed for the automatic respiratory cycle (breath) extraction and their subsequent grouping into STBPs.Main results. We suggest three criteria for the identification of STBPs, namely, the coefficient of variation of (i) breath tidal volume, (ii) breath duration and (iii) end-expiratory impedance. The total number of true STBPs identified by the proposed method was 294 out of 318 identified by the expert corresponding to accuracy over 90%. Specific activities such as speaking, eating and arm elevation are identified as sources of false positives and their discrimination is discussed.Significance. Simple and computationally efficient STBP detection and identification is a highly desirable component in the EIT processing pipeline. Our study implies that it is feasible, however, the determination of its limits is necessary in order to consider the implementation of more advanced and computationally demanding approaches such as deep learning and fusion with data from other wearable sensors such as accelerometers and microphones.
Asunto(s)
Respiración , Tomografía , Impedancia Eléctrica , Humanos , Volumen de Ventilación Pulmonar , Tomografía Computarizada por Rayos XRESUMEN
OBJECTIVE: Synovial inflammation is one of the most characteristic events in different types of arthritis, including Osteoarthritis (OA). Emerging evidence also suggests the involvement of lipids in the regulation of inflammatory processes. The aim of this study was to elucidate the heterogeneity and spatial distribution of lipids in the OA synovial membrane and explore their putative involvement in inflammation. METHOD: The abundance and distribution of lipids were examined in human synovial membranes. To this end, histological cuts from this tissue were analysed by matrix-assisted laser desorption ionization - mass spectrometry imaging (MALDI-MSI). The lipidomic profile of OA synovium was characterized and compared with healthy and other forms of inflammatory arthropathies as Rheumatoid Arthritis (RA) and Psoriatic Arthritis (PsA) using principal component analysis and discriminant analysis methods. Lipid identification was undertaken by tandem MS analyses and database queries. RESULTS: Our results reveal differential and characteristic lipidomic profiles between OA and control samples. Specifically, we unveiled that OA synovium presents elevated levels of phosphatidylcholines, fatty acids and lysophosphatidic acids and lower levels of lysophosphatidylcholines compared to control tissues. The spatial distribution of particular glycerophospholipids was also correlated with hypertrophic, inflamed or vascularized synovial areas. Compared with other inflammatory arthritis, the OA tissue showed lower amounts of phosphatidylethanolamine-based plasmalogens. CONCLUSIONS: This study provides a novel insight into the lipid profiles of synovial membrane and differences in abundance between OA and control tissues. The lipidomic alterations improves understanding of the pathogenic mechanisms of OA and may be important for its diagnosis.
Asunto(s)
Articulación de la Rodilla/metabolismo , Metabolismo de los Lípidos , Osteoartritis de la Rodilla/metabolismo , Membrana Sinovial/metabolismo , Anciano , Estudios de Casos y Controles , Análisis Discriminante , Femenino , Humanos , Lipidómica , Masculino , Persona de Mediana Edad , Análisis de Componente Principal , Espectrometría de Masas en TándemRESUMEN
A hybrid neural model (HNM) and particle swarm optimization (PSO) was used to optimize ethanol production by a flocculating yeast, grown on cashew apple juice. HNM was obtained by combining artificial neural network (ANN), which predicted reaction specific rates, to mass balance equations for substrate (S), product and biomass (X) concentration, being an alternative method for predicting the behavior of complex systems. ANNs training was conducted using an experimental set of data of X and S, temperature and stirring speed. The HNM was statistically validated against a new dataset, being capable of representing the system behavior. The model was optimized based on a multiobjective function relating efficiency and productivity by applying the PSO. Optimal estimated conditions were: S0 = 127 g L-1, X0 = 5.8 g L-1, 35 °C and 111 rpm. In this condition, an efficiency of 91.5% with a productivity of 8.0 g L-1 h-1 was obtained at approximately 7 h of fermentation.
Asunto(s)
Etanol/metabolismo , Jugos de Frutas y Vegetales , Malus/química , Modelos Biológicos , Redes Neurales de la Computación , Saccharomyces cerevisiae/crecimiento & desarrolloRESUMEN
INTRODUCTION: The assessment of the abuse potential of CNS-active drugs is a regulatory requirement. Drug discrimination is one of the nonclinical tests that contribute to this assessment by providing information on a drug's potential to induce a discriminative stimulus comparable to that of a known drug of abuse. AIM: The objective was to validate drug discrimination in the rat for the purpose of supporting regulatory submissions for novel drugs with potential cannabinoid-like activity. METHODS: Ten female Lister hooded rats were trained to discriminate no-drug from Δ9-THC (1.5 mg/kg, IP) under a FR10 schedule of reinforcement. Once trained, a Δ9-THC dose-response curve was obtained using doses of 0.25, 0.75, 1.5, and 3 mg/kg, IP. This was followed by evaluation of amphetamine (0.3 mg/kg, SC); morphine (3 mg/kg, IP); midazolam (2.5 mg/kg, PO); and the synthetic cannabinoids WIN55,212-2 (0.75 to 2 mg/kg, IP), CP-47,497 (0.5 to 2 mg/kg, IP), and JWH-018 (1 mg/kg, IP) for their discriminative stimulus similarity to Δ9-THC. RESULTS: Pharmacological specificity was demonstrated by achieving the anticipated dose-response curve for Δ9-THC, and a vehicle-like response for the non-cannabinoid drugs. Although full generalisation was obtained for JWH-018, in contrast to published literature, WIN55,212-2 and CP-47,497 failed to generalise to Δ9-THC. DISCUSSION: Based on the literature review performed in light of the results obtained, contrasting and unpredictable behavioural responses produced by cannabinoids in animals and humans raises the question of the reliability and relevance of including drug discrimination and self-administration studies within an abuse potential assessment for novel cannabinoid-like drugs.
Asunto(s)
Discriminación en Psicología/efectos de los fármacos , Dronabinol/efectos adversos , Trastornos Relacionados con Sustancias/prevención & control , Anfetamina/administración & dosificación , Anfetamina/efectos adversos , Animales , Benzoxazinas/administración & dosificación , Benzoxazinas/efectos adversos , Ciclohexanoles/administración & dosificación , Ciclohexanoles/efectos adversos , Modelos Animales de Enfermedad , Relación Dosis-Respuesta a Droga , Dronabinol/administración & dosificación , Evaluación Preclínica de Medicamentos/métodos , Femenino , Humanos , Indoles/administración & dosificación , Indoles/efectos adversos , Inyecciones Intraperitoneales , Midazolam/administración & dosificación , Midazolam/efectos adversos , Morfina/administración & dosificación , Morfina/efectos adversos , Morfolinas/administración & dosificación , Morfolinas/efectos adversos , Naftalenos/administración & dosificación , Naftalenos/efectos adversos , Ratas , Refuerzo en Psicología , Reproducibilidad de los Resultados , Automedicación , Trastornos Relacionados con Sustancias/diagnóstico , Trastornos Relacionados con Sustancias/etiologíaRESUMEN
Patient-specific computer simulations can be a powerful tool in clinical applications, helping in diagnostics and the development of new treatments. However, its practical use depends on the reliability of the models. The construction of cardiac simulations involves several steps with inherent uncertainties, including model parameters, the generation of personalized geometry and fibre orientation assignment, which are semi-manual processes subject to errors. Thus, it is important to quantify how these uncertainties impact model predictions. The present work performs uncertainty quantification and sensitivity analyses to assess the variability in important quantities of interest (QoI). Clinical quantities are analysed in terms of overall variability and to identify which parameters are the major contributors. The analyses are performed for simulations of the left ventricle function during the entire cardiac cycle. Uncertainties are incorporated in several model parameters, including regional wall thickness, fibre orientation, passive material parameters, active stress and the circulatory model. The results show that the QoI are very sensitive to active stress, wall thickness and fibre direction, where ejection fraction and ventricular torsion are the most impacted outputs. Thus, to improve the precision of models of cardiac mechanics, new methods should be considered to decrease uncertainties associated with geometrical reconstruction, estimation of active stress and of fibre orientation. This article is part of the theme issue 'Uncertainty quantification in cardiac and cardiovascular modelling and simulation'.
Asunto(s)
Modelos Cardiovasculares , Incertidumbre , Función Ventricular Izquierda , Fenómenos Biomecánicos , Sístole/fisiologíaRESUMEN
We previously reported that both the high-carbohydrate diet (HCD) and high-fat diet (HFD) given for two months promote lipid deposition and inflammation in the liver and brain of mice. The results obtained indicate a tissue-specific response to both diets. Herein, we compared the effects of HCD and HFD on fatty acid (FA) composition and inflammation in the gastrocnemius muscle. Male Swiss mice were fed with HCD or HFD for 1 or 2 months. Saturated FA (SFA), monounsaturated FA (MUFA), n-3 polyunsaturated FA (n-3 PUFA), and n-6 PUFA were quantified. The activities of stearoyl-CoA desaturase 1 (SCD-1), Δ-6 desaturase (D6D), elongase 6, and de novo lipogenesis (DNL) were estimated. As for indicators of the inflammatory tissue state, we measured myeloperoxidase (MPO) activity and gene expression of F4/80, tumor necrosis factor-α (TNF-α), interleukin (IL)-4, IL-6, and IL-10. The HCD led to a lower deposition of SFA, MUFA, n-3 PUFA, and n-6 PUFA compared to HFD. However, the HCD increased arachidonic acid levels, SFA/n-3 PUFA ratio, DNL, SCD-1, D6D, and MPO activities, and expression of IL-6, contrasting with the general idea that increased lipid deposition is associated with more intense inflammation. The HCD was more potent to induce skeletal muscle inflammation than the HFD, regardless of the lower lipid accumulation.
Asunto(s)
Carbohidratos de la Dieta/administración & dosificación , Grasas de la Dieta/administración & dosificación , Inflamación/metabolismo , Músculo Esquelético/metabolismo , Animales , Peso Corporal , Carbohidratos de la Dieta/metabolismo , Grasas de la Dieta/metabolismo , Ingestión de Energía , Expresión Génica , Masculino , RatonesRESUMEN
Osteoarthritis (OA) is one of the most common diseases worldwide caused by chronic degeneration of the joints. Its high prevalence and the involvement of several tissues define OA as a highly heterogeneous disease. New biological markers to evaluate the progression of the pathology and improve its prognosis are needed. Among all the different -omic strategies applied to OA, solution phase bottom-up proteomics has made an extensive contribution to the field of biomarker research. However, new technologies for protein analysis should be considered for a better understanding of the disease. This review focuses on complementary proteomic methodologies and new technologies for translational research of OA and other rheumatic pathologies, especially mass spectrometry imaging and protein imaging methods not applied by the OA community yet.
Asunto(s)
Osteoartritis , Proteómica , Biomarcadores , Humanos , Espectrometría de Masas , Osteoartritis/diagnóstico , ProteínasRESUMEN
We previously reported that both the high-carbohydrate diet (HCD) and high-fat diet (HFD) given for two months promote lipid deposition and inflammation in the liver and brain of mice. The results obtained indicate a tissue-specific response to both diets. Herein, we compared the effects of HCD and HFD on fatty acid (FA) composition and inflammation in the gastrocnemius muscle. Male Swiss mice were fed with HCD or HFD for 1 or 2 months. Saturated FA (SFA), monounsaturated FA (MUFA), n-3 polyunsaturated FA (n-3 PUFA), and n-6 PUFA were quantified. The activities of stearoyl-CoA desaturase 1 (SCD-1), Δ-6 desaturase (D6D), elongase 6, and de novo lipogenesis (DNL) were estimated. As for indicators of the inflammatory tissue state, we measured myeloperoxidase (MPO) activity and gene expression of F4/80, tumor necrosis factor-α (TNF-α), interleukin (IL)-4, IL-6, and IL-10. The HCD led to a lower deposition of SFA, MUFA, n-3 PUFA, and n-6 PUFA compared to HFD. However, the HCD increased arachidonic acid levels, SFA/n-3 PUFA ratio, DNL, SCD-1, D6D, and MPO activities, and expression of IL-6, contrasting with the general idea that increased lipid deposition is associated with more intense inflammation. The HCD was more potent to induce skeletal muscle inflammation than the HFD, regardless of the lower lipid accumulation.
Asunto(s)
Animales , Masculino , Conejos , Carbohidratos de la Dieta/administración & dosificación , Grasas de la Dieta/administración & dosificación , Músculo Esquelético/metabolismo , Inflamación/metabolismo , Peso Corporal , Ingestión de Energía , Carbohidratos de la Dieta/metabolismo , Grasas de la Dieta/metabolismo , Expresión GénicaRESUMEN
The brain is highly rich in lipids, which accounts for roughly 50% of its dry weight. The brain lipidome, generally characterized over half a century ago, is comprised of thousands of biochemical structures expressed differentially as a function of brain region, structure, cell type and subcellular compartment. Lipids play diverse structural and functional roles in the brain, not only due to their chemical diversity but also due to the unique hydrophobic environment that they create. This lipophilic milieu promotes interactions involving reactive oxygen and nitrogen species that may not occur, at least at a similar extent, in aqueous environments.In the present chapter, we have focused on 3 distinct types of bioactive lipids and the roles played in brain physiology and pathology: nitrated fatty acids, cholesterol and endocannabinoids. These lipids are diverse in origin and bioactivity: (1) nitrated fatty acids result from biochemical modification of dietary fatty acids by nutrients and are proposed to play diverse physiological roles, namely by modulating NF-kB and Nfr2-dependent signaling cascades and post-translational modification of proteins. Produced in the gastric compartment, they are absorbed into circulation and can cross the blood-brain barrier, providing a new route for the interaction between the gastrointestinal tract and the brain; (2) cholesterol, synthetized de novo in the brain, not only regulates the biophysical properties of cellular membranes, but can also physically interact with neurotransmitter receptors and other membrane proteins and enzymes such as those involved in the processing and trafficking of the amyloid precursor protein (APP) and Aß peptide; (3) endocannabinoids, a class of neuromodulators derived from fatty acids that are synthetized and released upon demand and incite cellular responses by binding to specific membrane receptors.Being one of the most important and adjustable determinants of human health, our goal is to highlight the impact of diet on the bioactivity of lipids in the brain, discussing novel and provocative findings that advocate that lipids may modulate the gut-brain axis and therefore higher cortical functions such as motor function, learning and memory.
Asunto(s)
Encéfalo/fisiología , Tracto Gastrointestinal/fisiología , Lípidos , Colesterol , Dieta , Endocannabinoides , Ácidos Grasos , Humanos , Transducción de SeñalRESUMEN
Objetivo: conhecer a percepção de enfermeiros da Estratégia de Saúde da Família sobre segurança do paciente. Métodos: pesquisa qualitativa, realizada em 2016 com 10 enfermeiros, no sul do Brasil,por meio de entrevistas submetidas à Análise de Conteúdo. Resultados: salienta-se a falta de familiarização dos enfermeiros com o assunto. Erros de medicação e quedas foram problemas à segurança dos pacientes e a comunicação efetiva fator promotor. A capacitação das equipes,implementação de instrumentos próprios voltados à segurança do paciente e diminuição da sobrecarga de trabalho foram apontadas enquanto estratégias de melhoria para a segurança do paciente.Considerações finais: o tema segurança do paciente ainda não faz parte da assistência dos enfermeiros da Saúde da Família, mas esses percebem sua importância. Uma cultura de segurança precisa ser implementada nos serviços mediante capacitação desses profissionais por meio de parceria com instituições de ensino.
Objective: to understand the Family Health Strategy nurses perception of patient safety. Methods:qualitative research was conducted in 2016 with 10 nurses, in southern Brazil, through interviewssubmitted to Content Analysis. Results: the nurses lack of familiarity with the subject ishighlighted. Medication errors and falls were problems to patient safety and effectivecommunication is a promoting factor. The training of teams, implementation of own instrumentsfocused at patient safety and reduction of work overload were pointed out as improvement strategies for patient safety. Final Considerations: the theme of patient safety is not yet part of the assistanceof Family Health nurses, but they realize the importance of this. A safety culture needs to beimplemented in services by training nurses through partnership with educational institutions.
Asunto(s)
Humanos , Atención Primaria de Salud , Enfermería , Errores Médicos , Salud Pública , Seguridad del PacienteRESUMEN
BACKGROUND: Endothelial dysfunction underlies cardiovascular disease that frequently affects aged individuals. Characterized by local decrease in nitric oxide, it results from down-regulation of endothelial nitric oxide synthase (eNOS) expression/activity. Aiming to elucidate the molecular mechanisms involved in age-related endothelial dysfunction and to unveil potential therapeutic targets, we tested how diet pattern, exercise and atorvastatin modulate the expression of eNOS, inducible NOS (iNOS), endothelin-1, sirtuins (SIRT) and microRNA-155 in the erectile tissue of high-fat fed aged rats. METHODS: Sprague-Dawley male rats fed with high-fat diet until they completed 12 months were grouped and subjected to energy restriction (ER), ER and atorvastatin, or, ER, atorvastatin and physical exercise. Controls were fed with standard rodent chow. The blood pressure was measured using the tail-cuff method before sacrifice at 18 months. Glucose, total cholesterol, HDL, triglyceride and CRP were assessed in blood and eNOS, endothelin-1, iNOS and sirtuins were detected by immunofluorescence in the penis sections; eNOS, endothelin-1, iNOS, SIRT2-4 and SIRT6-7 were semi-quantified by western blotting in tissue homogenates. MicroRNA-155 was quantified using RT-PCR in formalin-fixed paraffin embedded sections. To compare the studied variables, two-tail student t test was used. RESULTS: Atorvastatin promotes eNOS expression and is more efficient than ER or exercise in the control of hyperlipidemia and inflammation. Among the studied sirtuins, detected for the first time in the erectile tissue of the aged rat, SIRT2 aligns with eNOS expression. Both proteins exhibit over-expression in animals with combined exercise, atorvastatin and ER. Analysis of microRNA-155 expression also suggests its intervention in the regulation of eNOS expression. ER, particularly when combined with atorvastatin, was able to reverse the increase of iNOS and endothelin-1 in high-fat fed rats. CONCLUSIONS: The present results indicate that the association of ER, atorvastatin and exercise is more efficient than isolated interventions in the prevention of endothelial dysfunction.
RESUMEN
BACKGROUND: Syphilis is a sexually transmitted disease caused by Treponema pallidum. However, there are of hematogenic and vertical transmission. All health care professionals must be aware of the manifestations of this condition, such as oral lesions. OBJECTIVES: This study to analyze and compare four clinical cases of syphilis that were diagnosed based on lesions in the oral cavity with published literature. MATERIAL AND METHODS: Four patients with a confirmed sorologic and clinical diagnosis of syphilis were examined, confirmated from manifestation of oral lesions together with analysis of serological laboratory tests and histopathological analyses. RESULTS: Lesions were found in classic sites such as lips, tongue and skin. However, there were also lesions on the hard palate, and labial commissure, which correspond to less than 5% of the syphilis oral manifestations. CONCLUSIONS: The practice of unprotected oral sex may result in infection and development of syphilis. The acknowledgment of the oral manifestations of syphilis in all its period of training for health professionals is of basic importance, the association of clinical features, histopathological findings and serological tests are required to complete the diagnosis and correct treatment.
Asunto(s)
Enfermedades de la Boca/diagnóstico , Enfermedades de la Boca/microbiología , Sífilis/complicaciones , Adolescente , Adulto , Femenino , Humanos , Masculino , Adulto JovenRESUMEN
We present a new method for the discrimination of explosive cough events, which is based on a combination of spectral content descriptors and pitch-related features. After the removal of near-silent segments, a vector of event boundaries is obtained and a proposed set of 9 features is extracted for each event. Two data sets, recorded using electronic stethoscopes and comprising a total of 46 healthy subjects and 13 patients, were employed to evaluate the method. The proposed feature set is compared to three other sets of descriptors: a baseline, a combination of both sets, and an automatic selection of the best 10 features from both sets. The combined feature set yields good results on the cross-validated database, attaining a sensitivity of 92.3±2.3% and a specificity of 84.7±3.3%. Besides, this feature set seems to generalize well when it is trained on a small data set of patients, with a variety of respiratory and cardiovascular diseases, and tested on a bigger data set of mostly healthy subjects: a sensitivity of 93.4% and a specificity of 83.4% are achieved in those conditions. These results demonstrate that complementing the proposed feature set with a baseline set is a promising approach.
Asunto(s)
Tos , Auscultación , Bases de Datos Factuales , Humanos , SonidoRESUMEN
Objetivo: analisar as produções científicas disponíveis na literatura, sobre descolamento prematuro da placenta (DPP). Métodos: trata-se de uma revisão integrativa de literatura. A busca foi realizada nas bases de dados Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS) e MEDLINE pela Pubmed, a partir da questão norteadora Quais as evidências científicas sobre descolamento prematuro da placenta?. Resultados: predominaram estudos que não apresentam fortes evidências para aplicação clínica e a totalidade é de autoria médica. Os estudos analisados têm como foco a associação de DPP com patologias, alterações genéticas e comportamentais na gestação. Considerações finais: percebe-se a escassez com níveis de evidência altos, bem como, ausência de produções na área de enfermagem.
Objetive: this study aimed to analyze the scientific publications available in the literature onabruptio placentae. Methods: this is an integrative literature review. The search was conducted inthe databases Latin American and Caribbean Health Sciences (LILACS) and MEDLINE by PubMed, fromthe guiding question "What are the scientific evidence of abruptio placentae?. Results: studies thatdo not show strong evidence for clinical application predominated, most medical authorship. Thestudies analysis were focused on the DPP association with diseases, genetic and behavioral changesduring pregnancy. Final Considerations: there is a shortage with high levels of evidence, as well asthe absence of productions in nursing.
Asunto(s)
Humanos , Complicaciones del Embarazo , Desprendimiento Prematuro de la Placenta , Enfermería ObstétricaRESUMEN
In this work, the effect of initial sugar concentration and temperature on the production of ethanol by Saccharomyces cerevisiae CCA008, a flocculent yeast, using cashew apple juice in a 1L-bioreactor was studied. The experimental results were used to develop a kinetic model relating biomass, ethanol production and total reducing sugar consumption. Monod, Andrews, Levenspiel and Ghose and Tyagi models were investigated to represent the specific growth rate without inhibition, with inhibition by substrate and with inhibition by product, respectively. Model validation was performed using a new set of experimental data obtained at 34 °C and using 100 g L-1 of initial substrate concentration. The model proposed by Ghose and Tyagi was able to accurately describe the dynamics of ethanol production by S. cerevisiae CCA008 growing on cashew apple juice, containing an initial reducing sugar concentration ranging from 70 to 170 g L-1 and temperature, from 26 to 42 °C. The model optimization was also accomplished based on the following parameters: percentage volume of ethanol per volume of solution (%V ethanol/V solution), efficiency and reaction productivity. The optimal operational conditions were determined using response surface graphs constructed with simulated data, reaching an efficiency and a productivity of 93.5% and 5.45 g L-1 h-1, respectively.
Asunto(s)
Fermentación , Anacardium , Etanol , Jugos de Frutas y Vegetales , Malus , Saccharomyces cerevisiae , TemperaturaRESUMEN
We evaluated 160 hip joint radiographs of 40 dogs of different large breeds (25 females and 15 males) from the metropolitan area of Belo Horizonte, Minas Gerais, Brazil. The radiographs of each dog were obtained at two different stages: stage 1 (mean 7.23 months) and stage 2 (mean 14.25). The conventional radiographic method (CRM) and the radiographic distraction method (RDM) were used, carried out in both stages. CRM measured the Norberg angle (NA), the angle of inclination (AI) and evaluated the presence of degenerative joint disease (DJD). The MRD was performed to establish the distraction index (DI). The aims were to evaluate the presence of the Morgan line and other signs of DJD and correlate them with the degree of canine hip dysplasia (CHD) and also check if the DI greater than 0.3 (first stage) was associated with the presence of ML (second stage). It was found that DI, AI and changes of femoral neck and the formation of osteophytes were associated with the presence of ML. It was observed that if the DI is greater than 0.3 at the first stage, the chance of a positive outcome of ML in the second stage increases by 7.2 times. Thus, 49 joints showed DI > 0.3 at the first stage, in which 31 (63.3 %) presented ML at the second stage. Of the 31 animals that showed DI ≤ 0.3 at first, six (19.4%) had LM at the second stage. There has been a significant association between the presence of ML and the degree of CHD. The more severe the CHD, the higher the percentage of positive ML results. Thus, among the 24 (60 %) animals that showed ML, 11 (45.83 %) were classified as severe dysplastics, 5 (20.83%) as moderate and 8 (33.33 %) as mild. None of the animals classified as normal or borderline presented ML. Among the 8 animals classified as mild dysplastics, 5 showed only ML as DJD.(AU)
Avaliaram-se 160 radiografias das articulações coxofemorais de 40 cães de diferentes raças de grande porte, provenientes de Belo Horizonte, Brasil. As radiografias de cada animal foram obtidas em dois momentos: um (média de 7,23 meses de idade) e dois (média de 14,25 meses). Utilizaram-se o método radiográfico convencional (MRC) e o método radiográfico em distração (MRD), ambos realizados nos dois momentos. No MRC, mensurou-se o ângulo de Norberg (AN), o ângulo de inclinação (AI) e avaliou-se a presença de doença articular degenerativa (DAD). O MRD foi realizado para se estabelecer o índice de distração (ID). Os objetivos foram avaliar a presença da linha Morgan (LM) e de outros sinais de DAD, correlacionando-os com o grau de displasia coxofemoral (DCF); além de se verificar se o ID maior que 0,3 (primeiro momento) possui associação com a presença de LM (segundo momento). Verificou-se que ID, AI e encurtamento e/ou espessamento do colo femoral e formação de osteófitos foram associados à presença da LM. Observou-se que, quando o ID era maior que 0,3 no primeiro momento, a chance de um resultado positivo da LM no segundo momento aumentava em 7,2 vezes. No primeiro momento, 49 articulações apresentaram ID > 0,3. Destas, 31 (63,3%) apresentaram LM no segundo momento. Dos 31 animais que apresentaram ID ≤ 0,3 no primeiro momento, seis (19,4%) desenvolveram LM no segundo momento. Houve associação significativa entre presença de LM com o grau de DCF, e quanto mais grave a DCF, maior foi o percentual de resultados positivos da LM. Dos 24 (60%) animais que apresentaram LM, 11 (45,83%) foram classificados como displásicos graves, cinco (20,83%) como médios e oito (33,33%) como leves. Nenhum dos animais considerados suspeitos ou normais apresentou LM. Dos oito animais classificados como displásicos leves, cinco apresentaram apenas LM como sinal de DAD.(AU)