Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 46
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
Heart Vessels ; 39(3): 216-225, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37872307

RESUMO

Soluble ST2 (sST2) is the expression of a pathogenic process related to adverse remodeling that ultimately leads to increased mortality in heart failure (HF). Risk score models provide a comprehensive approach for mortality prediction, beyond the use of biomarkers alone. The objective was to determine the additional value of sST2 and two well-validated contemporary risk scores, BCN-Bio-HF and MAGGIC-HF, in predicting mortality and readmission in the acute setting. This prospective study included 129 patients (mean age 75 ± 9 years; 52% males) after an urgent HF visit. Baseline sST2 levels were measured and the two risk scores were calculated. The primary endpoint was all-cause mortality, and the secondary endpoint was HF readmissions. The follow-up period was 3.6 ± 1.9 years. Patients who died (46%) had higher sST2 concentrations (80.5 vs. 42.7 ng/ml; p < 0.001). The BCN-Bio-HF calculator with sST2 demonstrated the best discriminative ability for mortality prediction (area under the ROC curve: 0.792; p < 0.001). In multivariate analysis for each risk score, the MAGGIC-HF score retained its predictive value only in the model without sST2 (3-year risk: HR = 1.036; 95% CI 1.019-1.054; p < 0.001). However, the BCN-Bio-HF score maintained its prognostic value with sST2 (HR = 1.032; 95%CI 1.020-1.044; p < 0.001), as well as without sST2 (HR = 1.035; 95% CI 1.021-1.049; p < 0.001). sST2 was not associated with readmission, and only the BCN-Bio-HF risk of HF hospitalization showed independent predictive value (OR = 1.040; 95% CI 1.005-1.076; p = 0.023). For predicting long-term mortality in HF in the emergency department, the BCN-Bio-HF calculator with sST2 demonstrated superior discrimination and allows estimation of the risk of HF hospitalizations.


Assuntos
Insuficiência Cardíaca , Proteína 1 Semelhante a Receptor de Interleucina-1 , Masculino , Humanos , Idoso , Idoso de 80 Anos ou mais , Feminino , Estudos Prospectivos , Peptídeo Natriurético Encefálico , Prognóstico , Biomarcadores/metabolismo , Insuficiência Cardíaca/diagnóstico , Insuficiência Cardíaca/terapia
2.
Breast Cancer Res Treat ; 193(2): 455-465, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35290544

RESUMO

PURPOSE: To identify adherence to follow-up recommendations in long-term breast cancer survivors (LTBCS) of the SURBCAN cohort and to identify its determinants, using real-world data. METHODS: We conducted a retrospective study using electronic health records from 2012 to 2016 of women diagnosed with incident breast cancer in Spain between 2000 and 2006 and surviving at least 5 years. Adherence to basic follow-up recommendations, adherence according to risk of recurrence, and overall adherence were calculated based on attendance at medical appointments and imaging surveillance, by year of survivorship. Logistic regression models were fitted to depict the association between adherence and its determinants. RESULTS: A total of 2079 LTBCS were followed up for a median of 4.97 years. Of them, 23.6% had survived ≥ 10 years at baseline. We estimated that 79.5% of LTBCS were overall adherent to at least one visit and one imaging test. Adherence to recommendations decreased over time and no differences were found according to recurrence risk. Determinants of better overall adherence were diagnosis in middle age (50-69 years old), living in a more-deprived area, having fewer years of survival, receiving primary treatment, and being alive at the end of follow-up. CONCLUSION: We identified women apparently not complying with surveillance visits and tests. Special attention should be paid to the youngest and eldest women at diagnosis and to those with longer survival.


Assuntos
Neoplasias da Mama , Sobreviventes de Câncer , Assistência ao Convalescente , Idoso , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/terapia , Feminino , Humanos , Pessoa de Meia-Idade , Estudos Retrospectivos , Sobrevivência
3.
Vertex ; 33(157): 6-13, 2022 10 10.
Artigo em Espanhol | MEDLINE | ID: mdl-36219192

RESUMO

Objective: To describe the admissions of patients diagnosed with severe mental illness (SMI) and anxiety disorder in a regional hospital; to explore factors related to the patient's referrer upon admission and prolonged stay. Materials and methods: Cross-sectional study of episodes of admission to the regional Psychiatric Hospitalization Unit over a period of 11 years with ICD-10 diagnostic codesF20-29, F30-39, F60-69 and F40-48. The data was extracted through the Admissions Unit and the information from the electronic medical record. For the statistical treatment, descriptive or inferential tests were used with a confidence level of 95%. Results: 961 patients were included (2,324 total discharges), aged 40.8±14.0 years. The most frequent reasons for admission were: positive symptoms (agitation, delusions and hallucinations), followed by suicidal ideation and attempt. The main remitting agent of the patients was the family itself. Approximately 1/5 of the cases were referred by the health system itself, and » of those admitted had self-excluded themselves from specialized supervision for more than a year. Conclusions: The problems that caused the admission and its origin, as well as its lack of follow-up, can be considered as a clear opportunity for improvement in the follow-up of patients with severe mental illness. An orientation towards proactivity, acting before the decompensation, would contribute to improving the care and quality of life of patients with severe mental illness and their environment.


Objetivo: Describir los ingresos de pacientes diagnosticados de enfermedad mental grave y trastorno de ansiedad en un hospital comarcal; explorar los factores relacionados con la derivación del paciente al ingreso y con estancia prolongada. Materiales y métodos: Estudio de corte transversal de los episodios de ingreso en la Unidad de Hospitalización Psiquiátrica comarcal en un periodo de 11 años con los códigos diagnósticos CIE-10 F20-29, F30-39, F60-69 y F40-48. Se extrajeron los datos a través de la Unidad de Admisión y la información de la historia clínica electrónica. Para el tratamiento estadístico se usaron pruebas descriptivas o inferenciales con nivel de confianza del 95%. Resultados: Se incluyeron 961 pacientes (2.324 altas totales), con edad de 40,8±14,0 años. Los motivos más frecuentes de ingreso fueron: síntomas positivos (agitación, delirios y alucinaciones), seguidos de ideación e intento de suicidio. El principal agente remisor de los pacientes fue la propia familia. Aproximadamente 1/5 de casos fue derivado por el propio sistema sanitario, y » de los ingresados se había autoexcluido de la supervisión especializada durante más de un año. Conclusiones: Los problemas causantes del ingreso y su procedencia, así como su falta de seguimiento, pueden considerarse como una oportunidad clara de mejora en el seguimiento del paciente con enfermedad mental grave. Una orientación hacia la proactividad, actuando antes de la descompensación, contribuiría a mejorar la asistencia y calidad de vida de los pacientes con enfermedad mental grave y su entorno.


Assuntos
Hospitalização , Transtornos Mentais , Humanos , Estudos Retrospectivos
4.
BMC Geriatr ; 20(1): 396, 2020 10 08.
Artigo em Inglês | MEDLINE | ID: mdl-33032532

RESUMO

BACKGROUND: Exercise has shown being effective for managing chronic pain and preventing frailty status in older adults but the effect of an exercise program in the quality of life of pre-frail older adults with chronic pain remains unclear. Our objective was to evaluate the effectiveness of multicomponent structured physical exercise program for pre-frail adults aged 65 years or more with chronic pain to improve their perceived health related quality of life, compared with usual care. METHODS: Open label randomized controlled trial. Participants were community-dwelling pre-frail older adults aged 65 years or older with chronic pain and non-dependent for basic activities of daily living attending a Primary Healthcare Centre. Forty-four participants were randomly allocated to a control group (n = 20) that received usual care or an intervention group (n = 24) that received an 8-week physical activity and education program. Frailty status (SHARE Frailty Index), quality of life (EuroQol-5D-5L), pain intensity (Visual Analogue Scale), physical performance (Short Physical Performance Battery) and depression (Yessavage) were assessed at baseline, after the intervention and after 3 months follow-up. The effect of the intervention was analysed by mean differences between the intervention and control groups. RESULTS: The follow-up period (3 months) was completed by 32 patients (73%), 17 in the control group and 15 in the intervention group. Most participants were women (78.1%) with a mean age (standard deviation) of 77.2 (5.9) years and a mean pain intensity of 48.1 (24.4) mm. No relevant differences were found between groups at baseline. After the intervention, mean differences in the EuroQol Index Value between control and intervention groups were significant (- 0.19 95% CI(- 0.33- -0.04)) and remained after 3 months follow-up (- 0.21 95% CI(- 0.37- -0.05)). Participants in the exercise group showed better results in pain intensity and frailty after the intervention, and an improvement in physical performance after the intervention and after 3 months. CONCLUSIONS: An eight-week physical activity and education program for pre-frail older adults with chronic pain, compared with usual care, could be effective to improve quality of life after the intervention and after three-months follow-up. STUDY REGISTRATION DETAILS: This study was retrospectively registered in ClinicalTrials.gov with the identifier NCT04045535 .


Assuntos
Dor Crônica , Qualidade de Vida , Atividades Cotidianas , Idoso , Dor Crônica/diagnóstico , Dor Crônica/terapia , Exercício Físico , Terapia por Exercício , Feminino , Idoso Fragilizado , Humanos
5.
J Food Sci Technol ; 56(1): 245-252, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30728566

RESUMO

The objective of the present work was to study the effect of liquid whey from the cheese production process on the gels developed by high hydrostatic pressure from whey protein isolate powder (WPI). Changes in pH, color, textural parameters, and water retention capacity of the gels obtained were analyzed during storage for 28 days at refrigeration temperature (4 °C). Mixtures of liquid whey from cheese making processes and different WPI percentages gave gels with different characteristics after being processed by high hydrostatic pressures. The pH values and color parameters (L*, a*, b*) varied slightly, depending directly on WPI concentration and storage time. The values of hardness, elasticity, and cohesiveness were dependent on the liquid medium used to dissolve the WPI (liquid cheese whey or distilled water), WPI concentration, and storage time. The use of liquid cheese whey for gel formation favored water retention, reducing the appearance of syneresis (exudation). The results obtained in the present study indicated a possible use and revalorization of cheese whey obtained in cheese production to obtain WPI gels with improved physicochemical properties, using high hydrostatic pressure as technology for their production.

6.
Maturitas ; 182: 107918, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38280353

RESUMO

OBJECTIVES: To study the impact of comorbidities, multimorbidity, and multimorbidity clusters on adherence to recommended follow-up guidelines among long-term breast cancer survivors. STUDY DESIGN: Retrospective cohort study based on 2078 women diagnosed with breast cancer from 2000 to 2006 and followed up from 2012 to 2016. MAIN OUTCOME MEASURES: Adherence to breast cancer follow-up recommendations (annual medical visit and imaging) was determined. Comorbidities were classified as acute/chronic. Multimorbidity was defined as the presence of two or more chronic comorbidities aside from breast cancer. Five multimorbidity clusters were considered. Multivariate logistic regression models were fitted to determine the relationship between adherence to recommendations and the presence of comorbidities and multimorbidity, considering both sociodemographic and clinical characteristics. RESULTS: Overall adherence to recommendations was 79.5 %. Adherence was lower among long-term breast cancer survivors with no comorbidities (75.8 %). Among multimorbidity clusters, adherence was highest in the anxiety and fractures cluster (84.3 %) and was lowest in the musculoskeletal and cardiovascular cluster (76.4 %). In adjusted multivariate models, multimorbidity was associated with higher levels of adherence (OR = 1.52 95 %CI 1.16-1.99), and adherence was highest in the metabolic and degenerative cluster (OR = 2.2 95 %CI 1.4-3.5). CONCLUSION: Adherence to follow-up recommendations was higher among long-term breast cancer survivors with multimorbidity than among those without. Adherence also differed by multimorbidity cluster. These results suggest suboptimal adherence to the current follow-up recommendations in certain groups, suggesting the need to adapt clinical practice guidelines to reflect patients' comorbidities and different characteristics.


Assuntos
Neoplasias da Mama , Sobreviventes de Câncer , Humanos , Feminino , Multimorbidade , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/terapia , Seguimentos , Estudos Retrospectivos , Comorbidade
7.
Sustain Sci ; 18(3): 1135-1148, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36536934

RESUMO

This paper aims to unpack the relational dimension of place and placemaking by analysing how creative actions underpin relational values towards socio-spatial restoration in the sacrifice zone affecting the communities of Quintero and Puchuncaví (QPSZ) in Chile. Sacrifice zones are places permanently subject to environmental damage and lack of environmental regulation. For affected populations in environmentally degraded areas, creative actions such as murals, music, and street performances have become a way to re-establish connections both among humans, and between humans and the environment. To date, little has been theorized on this connection. With this in mind, we use network analysis to analyze which and how relational values are mobilized by artistic actions, and to examine ensuing socio-spatial transformations. Drawing insights from 35 interviews with activists, artists, and residents in QPSZ, we observed relational effects of arts, especially in creation processes, and in representations of local elements and life histories. The materiality of artistic practices raised as a force of placemaking, and so did artistic spaces as promoters of networking and social cohesion, essential for socio-spatial restoration. By bringing together insights from aesthetic politics, human geography, and relational values, this paper contributes to the emerging literature on art committed to tackling socio-environmental crises, and to political-ecological theories on the transformation of degraded areas. Supplementary Information: The online version contains supplementary material available at 10.1007/s11625-022-01252-6.

8.
Carbohydr Polym ; 316: 120999, 2023 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-37321720

RESUMO

Physically-induced depolymerisation procedures are often preferred for obtaining alginate and chitosan oligosaccharides as they either do not use or make minimal use of additional chemicals; therefore, separation of the final products is facile. In this work, solutions of three types of alginate with different mannuronic and guluronic acid residues ratio (M/G ratio) and molecular weights (Mw) and one type of chitosan were non-thermally processed by applying high hydrostatic pressures (HHP) up to 500 MPa (20 min) or pulsed electric fields (PEF) up to 25 kV cm-1 (4000 µm) in the absence or presence of 3 % hydrogen peroxide (H2O2). The impact on the physicochemical properties of alginate and chitosan was investigated by rheology, GPC, XRD, FTIR, and 1H NMR. In the rheological investigations, the apparent viscosities of all samples decreased with increasing shear rate, indicating a non-Newtonian shear-thinning behaviour. GPC results reported Mw reductions that ranged between 8 and 96 % for all treatments. NMR results revealed that HHP and PEF treatment predominantly reduced the M/G ratio of alginate and the degree of deacetylation (DDA) of chitosan, whilst H2O2 promoted an increase in the M/G ratio in alginate and DDA of chitosan. Overall, the present investigation has demonstrated the feasibility of HHP and PEF for rapidly producing alginate and chitosan oligosaccharides.


Assuntos
Quitosana , Peróxido de Hidrogênio , Pressão Hidrostática , Alginatos/química , Oligossacarídeos
9.
Nat Hum Behav ; 7(3): 342-352, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36702939

RESUMO

This work examines the possible behaviour of Neanderthal groups at the Cueva Des-Cubierta (central Spain) via the analysis of the latter's archaeological assemblage. Alongside evidence of Mousterian lithic industry, Level 3 of the cave infill was found to contain an assemblage of mammalian bone remains dominated by the crania of large ungulates, some associated with small hearths. The scarcity of post-cranial elements, teeth, mandibles and maxillae, along with evidence of anthropogenic modification of the crania (cut and percussion marks), indicates that the carcasses of the corresponding animals were initially processed outside the cave, and the crania were later brought inside. A second round of processing then took place, possibly related to the removal of the brain. The continued presence of crania throughout Level 3 indicates that this behaviour was recurrent during this level's formation. This behaviour seems to have no subsistence-related purpose but to be more symbolic in its intent.


Assuntos
Homem de Neandertal , Animais , Herbivoria , Crânio , Arqueologia , Espanha , Mamíferos
10.
Nucleic Acids Res ; 38(5): e30, 2010 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-20007146

RESUMO

Misfolded proteins are caused by genomic mutations, aberrant splicing events, translation errors or environmental factors. The accumulation of misfolded proteins is a phenomenon connected to several human disorders, and is managed by stress responses specific to the cellular compartments being affected. In wild-type cells these mechanisms of stress response can be experimentally induced by expressing recombinant misfolded proteins or by incubating cells with large concentrations of amino acid analogues. Here, we report a novel approach for the induction of stress responses to protein aggregation. Our method is based on engineered transfer RNAs that can be expressed in cells or tissues, where they actively integrate in the translation machinery causing general proteome substitutions. This strategy allows for the introduction of mutations of increasing severity randomly in the proteome, without exposing cells to unnatural compounds. Here, we show that this approach can be used for the differential activation of the stress response in the Endoplasmic Reticulum (ER). As an example of the applications of this method, we have applied it to the identification of human microRNAs activated or repressed during unfolded protein stress.


Assuntos
Proteoma/genética , RNA de Transferência de Serina/química , Resposta a Proteínas não Dobradas/genética , Animais , Processos de Crescimento Celular , Linhagem Celular , Sobrevivência Celular , Embrião de Galinha , Interpretação Estatística de Dados , Humanos , MicroRNAs/classificação , MicroRNAs/metabolismo , Mutagênese Sítio-Dirigida , Mutação , Biossíntese de Proteínas , RNA de Transferência de Serina/metabolismo
11.
J Cancer Surviv ; 16(1): 132-141, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-33759086

RESUMO

PURPOSE: This study aimed to evaluate health service utilization in Spain among long-term breast cancer survivors and to compare it with that among women with no history of breast cancer. METHODS: Study based on the SURBCAN cohort includes a sample of long-term breast cancer survivors and a sample of women without breast cancer from 5 Spanish regions. Healthcare utilization was assessed through primary care, hospital visits, and tests during the follow-up period (2012 to 2016) by using electronic health records. Annual contact rates to healthcare services were calculated, and crude and multivariate count models were fitted to estimate the adjusted relative risk of healthcare services use. RESULTS: Data were obtained from 19,328 women, including 6512 long-term breast cancer survivors. Healthcare use was higher among breast cancer survivors (20.9 vs 16.6; p < 0.0001) and decreased from >10 years of survival. Breast cancer survivors who underwent a mastectomy were more likely to have a primary care visit (RR = 3.10 95% CI 3.08-3.11). Five to ten years survivors were more likely to have hospital inpatient visits and imaging test compared to women without breast cancer (RRa = 1.35 95% CI 1.30-1.39 and RRa = 1.27 95% CI 1.25-1.29 respectively). CONCLUSION: This study shows higher use of health services in long-term breast cancer survivors than in women without breast cancer regardless of survival time. IMPLICATIONS FOR CANCER SURVIVORS: These results help to estimate the health resources needed for the growing group of breast cancer survivors and to identify risk factors that drive higher use of health services.


Assuntos
Neoplasias da Mama , Sobreviventes de Câncer , Neoplasias da Mama/terapia , Feminino , Serviços de Saúde , Humanos , Estudos Longitudinais , Mastectomia , Espanha/epidemiologia
12.
Foods ; 10(3)2021 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-33652856

RESUMO

In this work, the design of low moisture (10%) oil/water emulsions based on sunflower oil were investigated, as well as their application in a bakery cream as a conventional fat replacer. The emulsions were dehydrated to reach 10% moisture content, achieving highly concentrated vegetable oil gel emulsions of different consistencies and qualities. Physical properties of the dried emulsions were evaluated by texture, microstructure, and oil loss determination. The reformulated bakery creams with the dried emulsions obtained from 47% oil showed better spreadability, viscosity, and viscoelasticity properties. A shortening replacement with the dried emulsion obtained from 70% initial oil caused a negative impact on the creams' consistency, with lower viscosity and lower hysteresis area, revealing a weakness of structure. This research provided new knowledge about the structuration of vegetable oils through concentrated emulsions and their application as a source of healthy fat in creams for bakery applications.

13.
Foods ; 10(4)2021 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-33917185

RESUMO

Cocoa butter (CB) is a main ingredient in pastry due to the unique functional properties of its fat, which is high in saturated fatty acids (SFAs). However, excessive consumption of SFAs is associated with the occurrence of several chronic diseases. This study researched the partial or total replacement of CB by an oleogel (OG) formulated with a healthier lipid profile, for mixed systems that would allow a partial substitution of CB in confectionery products. The "emulsion-templated approach" was used to develop a sunflower oil-HPMC-based OG. Different CB:OG ratios were formulated increasing the percentage replacement of CB by OG from 50 to 100%. Rheological and textural properties were determined and compared with a CB control at 20 and 10 °C. Oil-binding capacity was also analyzed. The systems showed a solid-like behavior, with higher elastic than viscous modulus, which increased with CB concentration. Compared with 20 °C, at 10 °C there was an increase in connectivity, viscoelasticity, and consistency of the systems, in response to a more complete CB crystallization. The replaced systems also presented a better lipid profile than CB. This evidence suggests that formulated CB:OG system at 50:50 ratio could become useful as a CB equivalent in chocolate products.

14.
Foods ; 10(4)2021 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-33920844

RESUMO

The effect of high hydrostatic pressure (HHP) combined with enzymatic methods or gelatin incorporation in the gelation process of protein isolated from Acheta domesticus was investigated. The results indicate that transglutaminase (TGasa) or glucose oxidase (GOx) enzymes can induce reversible aggregation in dispersions of insoluble protein fractions and increase viscosity in dispersions of soluble fractions, but does not induce gel formation even after HHP treatment; in consequence, enzymatic treatment on cricket protein can be used to increase viscosity but not to form gels. It is technically feasible to obtain gels by adding 2% porcine gelatin to dispersions of protein fractions and subjecting them to HHP. The firmness and syneresis variation values of those gels during storage depended on the protein extracted fraction (insoluble or soluble protein) and on the concentration of protein used. The highest hardness and lowest syneresis was found with the gels obtained from the insoluble fraction at 11 and 15% (w/w) protein concentration. Color difference (ΔE* > 3) appreciable to the naked eye was observed along the storage period and no noticeable pH variations were found after 28 days of storage. Results indicate that new raw materials of interest can be developed for the food industry based on cricket protein isolates, to make high-protein foods which could be applied in a wide variety of different food applications including 3D printing or fat substitution.

15.
Gels ; 7(4)2021 Nov 18.
Artigo em Inglês | MEDLINE | ID: mdl-34842693

RESUMO

The reformulation of chocolates seeks to find innovative alternatives to cocoa butter (CB) that are more economical and adhere to nutritional recommendations to replace saturated fats with unsaturated ones. In this research, chocolates were elaborated by substituting CB with an oleogel (OG) formulated with hydroxypropyl methylcellulose (HPMC) as an entrapper of sunflower oil by using the foam-templated approach. Four different CB/OG blends were prepared and characterized as potential CB substitutes (100/0 control), at replacement levels of 30%, 50%, 70% and 100% (70/30, 50/50, 30/70 and 0/100 blends), and subsequently, CB/OG-based chocolates (CB/OG-Ch) were formulated (100/0-Ch, 70/30-Ch, 50/50-Ch, 30/70-Ch and 0/100-Ch). Both the CB/OG blends and the CB/OG-Ch counterparts were characterized by dynamic and stationary rheology, hardness, thermal parameters, microstructure, and oil-binding capacity; in addition, the lipid profile of the chocolates was analyzed, and a sensory analysis was performed. Increasing the OG proportion in the CB/OG blend weakens the rigidity and strength of the fat-crystal network conferred by the CB, and decreases both its viscoelasticity and thermal parameters, but the differences between all the different properties and parameters of the CB/OG-Ch samples diminished in presence of the other ingredients used in the chocolate formulation. Sensory analysis evidenced that it is possible to replace up to 70% of CB with the OG, although from a technological point of view a replacement level of 50% would seem more appropriate. As compared to 100/0-Ch, 50/50-Ch and 30/70-Ch involve saturated fat reductions of 55% and 37%, respectively.

16.
Foods ; 10(8)2021 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-34441584

RESUMO

In a preliminary study, commercial insect powders were successfully identified using infrared spectroscopy combined with multivariate analysis. Nonetheless, it is necessary to check if this technology is capable of discriminating, predicting, and quantifying insect species once they are used as an ingredient in food products. The objective of this research was to study the potential of using attenuated total reflection Fourier transform mid-infrared spectroscopy (ATR-FTMIR) combined with multivariate analysis to discriminate doughs and 3D-printed baked snacks, enriched with Alphitobius diaperinus and Locusta migratoria powders. Several doughs were made with a variable amount of insect powder (0-13.9%) replacing the same amount of chickpea flour (46-32%). The spectral data were analyzed using soft independent modeling of class analogy (SIMCA) and partial least squares regression (PLSR) algorithms. SIMCA models successfully discriminated the insect species used to prepare the doughs and snacks. Discrimination was mainly associated with lipids, proteins, and chitin. PLSR models predicted the percentage of insect powder added to the dough and the snacks, with determination coefficients of 0.972, 0.979, and 0.994 and a standard error of prediction of 1.24, 1.08, and 1.90%, respectively. ATR-FTMIR combined with multivariate analysis has a high potential as a new tool in insect product authentication.

17.
Carbohydr Polym ; 256: 117496, 2021 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-33483023

RESUMO

Formulations based on agar and κ-carrageenan were investigated for the production of emulsion gels applicable as tissue mimicking phantoms. The effects of the polysaccharide matrix, the oil content and the presence of surfactants on the micro-/nanostructure, rheology, and mechanical and dielectric properties were investigated. Results showed a high capacity of the agar to stabilize oil droplets, producing gels with smaller (10-21 µm) and more uniform oil droplets. The addition of surfactants allowed increasing the oil content and reduced the gel strength and stiffness down to 57 % and 34 %, respectively. The permittivity and conductivity of the gels were reduced by increasing the oil content, especially in the agar gels (18.8 and 0.05 S/m, respectively), producing materials with dielectric properties similar to those of low-water content tissues. These results evidence the suitability of these polysaccharides to design a variety of tissue mimicking phantoms with a broad range of mechanical and dielectric properties.


Assuntos
Ágar/química , Carragenina/química , Polissacarídeos/química , Alga Marinha/química , Emulsões , Géis , Íons , Microscopia Confocal , Óleos , Oscilometria , Imagens de Fantasmas , Reologia , Espalhamento de Radiação , Espalhamento a Baixo Ângulo , Estresse Mecânico , Tensoativos/química , Temperatura , Raios X
18.
Foods ; 9(6)2020 Jun 17.
Artigo em Inglês | MEDLINE | ID: mdl-32560410

RESUMO

This study investigated the texture properties and fat digestibility of new spreadable chocolate creams formulated with an emulsion composed of milk fat and a cellulose ether as a fat source. The spreadability was analysed at 20 °C and compared with a commercial spreadable cream formulated with palm fat. Structural changes in the creams after the in vitro oral and gastric digestion stages were evaluated; lipid digestibility was determined by titration with NaOH during intestinal digestion. Spreadability tests showed the spreads were similar. After oral digestion, the commercial spread showed an increase in extrusion force because of flocculation induced by saliva, an effect not observed in spreads with cellulose ether. Digestibility determination showed lower values for the reformulated spreads. Therefore, milk fat-cellulose ether based emulsions offer an alternative to achieve reformulated spreadable creams, with physical properties similar to those of commercial products but providing reduced fat content and lower lipid digestibility, without compromising the quality of the final product.

19.
Rev Esp Salud Publica ; 942020 Jul 29.
Artigo em Espanhol | MEDLINE | ID: mdl-32724032

RESUMO

Although Spain is a developed country, Tuberculosis (TB) was for years a disease with high incidence rates compared to other European countries, a situation that worsened with the HIV/AIDS epidemic and with the increase of immigration. The Spanish Respiratory Society (SEPAR) created in 2004 the Integrated Research Programs (PII) on respiratory diseases, including TB (PII-TB) which has carried out studies related to the five lines of research that it maintains: clinical / epidemiological, microbiological, technological/clinical management, evaluative, and international cooperation. Following the recommendations on the necessity to evaluate health programs made by international organizations, the evaluation of PII-TB was recently carried out, revealing the situation of the main variables of the disease and their evolution over the time that the program has been working. PII-TB has generated abundant data on the situation of this disease in our country in years when this information has been limited. The fact that the results of the studies have been widely disseminated makes it easier for all professionals involved in the prevention, diagnosis and treatment of TB to implement and/or to improve activities that, finally, will contribute to the control of this disease.


A pesar de que España es un país desarrollado, la tuberculosis (TB) fue durante años una enfermedad con importantes tasas de incidencia con respecto a otros países europeos, situación que empeoró con la epidemia del VIH/SIDA y el aumento de la inmigración. Como consecuencia de la situación, SEPAR crea en el año 2004 los Programas Integrados de Investigación (PII), entre los que se incluye la TB (PII-TB). Dicho programa ha llevado a cabo estudios relacionados con alguna de las cinco líneas de investigación que éste mantiene: clínica/epidemiológica, microbiológica, tecnológica/gestión clínica, evaluativa y de cooperación internacional. Siguiendo las recomendaciones sobre la necesidad de evaluar los programas de salud que hacen los organismos internacionales, se realizó recientemente la evaluación del PII-TB, lo que ha permitido conocer la situación de las principales variables de la enfermedad a lo largo de los años de funcionamiento del programa y la evolución de las mismas. El PII-TB ha generado abundantes datos sobre la situación de esta enfermedad en nuestro país durante unos años en que esta información ha sido limitada. El hecho de que los resultados de los estudios hayan sido extensamente difundidos, facilita que todos los profesionales implicados en la prevención, diagnóstico y tratamiento de la TB puedan implementar y/o mejorar las actividades que, en definitiva, contribuirán a mejorar el control de esta enfermedad.


Assuntos
Pesquisa Biomédica/organização & administração , Sociedades Científicas , Tuberculose/prevenção & controle , Antituberculosos/uso terapêutico , Pesquisa Biomédica/estatística & dados numéricos , Emigração e Imigração , Europa (Continente) , Humanos , Cooperação Internacional , Avaliação de Programas e Projetos de Saúde , Publicações/estatística & dados numéricos , Espanha , Tuberculose/diagnóstico , Tuberculose/tratamento farmacológico
20.
Foods ; 10(1)2020 Dec 23.
Artigo em Inglês | MEDLINE | ID: mdl-33374600

RESUMO

Incorporation of xanthan gum and locust bean gum in rice flour supplemented by chickpea flour was used to obtain a good quality of nutritionally enriched biscuit for celiac children. Response surface methodology (RSM) was applied to optimize the levels of xanthan and locust bean gum added to the composite gluten-free flour. Analysis was based on the rheological (hardness and viscoelastic) characteristics of the dough and specific volume, water activity, and hardness of the biscuit. The results revealed that the regression and variance analysis coefficients related to the rheological and physical properties of dough and biscuit under the influence of independent variables were sufficient for an adequate and well-fitted response surface model. Linear terms of variables significantly affect most of the dough and biscuit parameters, where the xanthan gum effect was found to be more pronounced than locust bean gum. Interaction terms showed a significant positive effect on the specific volume of the biscuits and a negative effect on the water activity. However, the interactive effect of gums did not significantly affect the rheological parameters of the dough. Optimized conditions were developed to maximize the specific volume of biscuit and minimize water activity and biscuit hardness, while keeping hardness and viscoelastic properties of the dough in range. Predicted responses were found satisfactory for both rheological and physical characteristics of dough and biscuit.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA