Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 92
Filtrar
1.
J Cancer Educ ; 39(4): 426-436, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38592656

RESUMEN

The European Oncology Nursing Society (EONS) is a pan-European not for profit society involving approximately 28,000 cancer nurses from 32 countries in the region. The European College of Cancer Nursing (ECCN) exists under the umbrella of EONS and was established in 2020 with a strategic priority to develop, promote and deliver educational opportunities for nurses across Europe. ECCN introduced a pilot on-line education programme for 20 nurses in January 2023. This study evaluated participating nurses' views and experience of learning on the pilot programme. The study adopted a mixed method approach guided by the four levels of the Kirkpatrick theoretical framework. A dominant focus on qualitative data was used with supplementary quantitative data. The Standards for Reporting Qualitative Research (SRQR) was followed. Eleven nurses completed the pre-pilot online questionnaire (response rate 65%) and seven (n = 7) completed the post-pilot questionnaire (41% response rate). Five (n = 5) nurses participated in two focus group interviews. Data analysis resulted in the development of four overarching themes: A wider world of cancer nursing; Shapeless mentorship; Impact on Practice; Learning online and what now? On commencement of online education programmes, nurses value a structured timetable and support from nursing management to maximise engagement with the learning materials.


Asunto(s)
Enfermería Oncológica , Humanos , Proyectos Piloto , Enfermería Oncológica/educación , Europa (Continente) , Grupos Focales , Encuestas y Cuestionarios , Investigación Cualitativa , Educación a Distancia , Femenino , Masculino , Adulto
2.
Antibiotics (Basel) ; 13(4)2024 Mar 22.
Artículo en Inglés | MEDLINE | ID: mdl-38666966

RESUMEN

Ventilator-associated pneumonia (VAP) is a prevailing nosocomial infection in critically ill patients requiring invasive mechanical ventilation (iMV). The impact of VAP is profound, adversely affecting patient outcomes and placing a significant burden on healthcare resources. This study assessed for the first time the contemporary VAP epidemiology in Portugal and its burden on the healthcare system and clinical outcomes. Additionally, resource consumption (duration of iMV, intensive care unit (ICU), hospital length of stay (LOS)) and empirical antimicrobial therapy were also evaluated. This multicenter, retrospective study included patients admitted to the hospital between July 2016 and December 2017 in a participating ICU, who underwent iMV for at least 48 h. Patients with a VAP diagnosis were segregated for further analysis (n = 197). Control patients, ventilated for >48 h but without a VAP diagnosis, were also included in a 1:1 ratio. Cumulative VAP incidence was computed. All-cause mortality was assessed at 28, 90, and 365 days after ICU admission. Cumulative VAP incidence was 9.2% (95% CI 8.0-10.5). The all-cause mortality rate in VAP patients was 24.9%, 34.0%, and 40.6%, respectively, and these values were similar to those observed in patients without VAP diagnosis. Further, patients with VAP had significantly longer ICU (27.5 vs. 11.0 days, p < 0.001) and hospital LOS (61 vs. 35.9 days, p < 0.001), more time under iMV (20.7 vs. 8.0 days, p < 0.001) and were more often subjected to tracheostomy (36.5 vs. 14.2%; p < 0.001). Patients with VAP who received inappropriate empirical antimicrobials had higher 28-day mortality, 34.3% vs. 19.5% (odds ratio 2.16, 95% CI 1.10-4.23), although the same was not independently associated with 1-year all-cause mortality (p = 0.107). This study described the VAP impact and burden on the Portuguese healthcare system, with approximately 9% of patients undergoing iMV for >48 h developing VAP, leading to increased resource consumption (longer ICU and hospital LOS). An unexpectedly high incidence of inappropriate, empirical antimicrobial therapy was also noted, being positively associated with a higher mortality risk of these patients. Knowledge of the Portuguese epidemiology characterization of VAP and its multidimensional impact is essential for efficient treatment and optimized long-term health outcomes of these patients.

3.
Vaccines (Basel) ; 12(2)2024 Feb 17.
Artículo en Inglés | MEDLINE | ID: mdl-38400190

RESUMEN

Despite advances in therapies, bacterial chronic respiratory infections persist as life-threatening to patients suffering from cystic fibrosis (CF). Pseudomonas aeruginosa and bacteria of the Burkholderia cepacia complex are among the most difficult of these infections to treat, due to factors like their resistance to multiple antibiotics and ability to form biofilms. The lack of effective antimicrobial strategies prompted our search for alternative immunotherapies that can effectively control and reduce those infections among CF patients. Previous work from our group showed that the anti-BCAL2645 goat polyclonal antibody strongly inhibited Burkholderia cenocepacia to adhere and invade cultured epithelial cells. In this work, we showed that the polyclonal antibody anti-BCAL2645 also strongly inhibited the ability of P. aeruginosa to form biofilms, and to adhere and invade the human bronchial epithelial cell line CFBE41o-. The polyclonal antibody also inhibited, to a lesser extent, the ability of B. multivorans to adhere and invade the human bronchial epithelial cell line CFBE41o. We also show that the ability of B. cenocepacia, P. aeruginosa and B. multivorans to kill larvae of the Galleria mellonella model of infection was impaired when bacteria were incubated with the anti-BCAL2645 antibody prior to the infection. Our findings show that an antibody against BCAL2645 possesses a significant potential for the development of new immunotherapies against these three important bacterial species capable of causing devastating and often lethal infections among CF patients.

4.
Diagnostics (Basel) ; 14(2)2024 Jan 12.
Artículo en Inglés | MEDLINE | ID: mdl-38248050

RESUMEN

Critically ill patients with rapidly deteriorating clinical status secondary to respiratory and cardio-vascular compromise are at risk for immediate collapse if the underlying pathology is not recognized and treated. Rapid diagnosis is of utmost importance regardless of the setting. Although there are data to support the use of point-of-care ultrasound in critical patients, there is no consensus about the best educational strategy to implement. We designed a curriculum based on the ABC (Airway, Breathing, Circulation) protocol that covers essential airway, lung, and cardiac ultrasound skills needed for fast diagnosis in critical patients and applied it in high-fidelity simulation-based medical education sessions for anesthesia and intensive care residents year one and two. After theoretical and practical assessments, our results show statistical differences in the theoretical knowledge and above-average results in practical assessment. Our proposed curriculum based on a simple ABC POCUS protocol, with an Airway, Breathing, and Circulation approach, is useful in teaching ultrasound basics regarding airway, lung, and cardiac examination using high-fidelity simulation training to anesthesia and intensive care residents, but further research is needed to establish the utility of Simulation-Based Medical Education in Point of Care Ultrasound in the critical patient.

5.
MedEdPublish (2016) ; 13: 11, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38028656

RESUMEN

Accreditation processes for health care professions are designed to ensure that individuals and programs in these fields meet established standards of quality and effectiveness. The accelerating pace of globalization in the health care professions has increased the need for a shared understanding of the vocabulary of evaluation, assessment, and accreditation. The psychometric principles of valid and reliable assessment are commonly accepted, but the terminology is confusing. We believe that all stakeholders - evaluators, faculty, students but also the community - will benefit from a shared language and common set of definitions. We recognize that not all readers will agree with the definitions we propose, but we hope that this guide will help to ensure clarity, consistency, transparency, and fairness, and that it will promote through the stimulation of a debate greater collaboration across national and international boundaries.

7.
NPJ Parkinsons Dis ; 9(1): 52, 2023 Apr 04.
Artículo en Inglés | MEDLINE | ID: mdl-37015928

RESUMEN

Elevated urine bis(monoacylglycerol)phosphate (BMP) levels have been found in gain-of-kinase function LRRK2 G2019S mutation carriers. Here, we have expanded urine BMP analysis to other Parkinson's disease (PD) associated mutations and found them to be consistently elevated in carriers of LRRK2 G2019S and R1441G/C as well as VPS35 D620N mutations. Urine BMP levels are promising biomarkers for patient stratification and potentially target engagement in clinical trials of emerging targeted PD therapies.

9.
Int J Mol Sci ; 24(6)2023 Mar 07.
Artículo en Inglés | MEDLINE | ID: mdl-36982144

RESUMEN

Finding new therapeutic approaches towards colorectal cancer (CRC) is of increased relevance, as CRC is one of the most common cancers worldwide. CRC standard therapy includes surgery, chemotherapy, and radiotherapy, which may be used alone or in combination. The reported side effects and acquired resistance associated with these strategies lead to an increasing need to search for new therapies with better efficacy and less toxicity. Several studies have demonstrated the antitumorigenic properties of microbiota-derived short-chain fatty acids (SCFAs). The tumor microenvironment is composed by non-cellular components, microbiota, and a great diversity of cells, such as immune cells. The influence of SCFAs on the different constituents of the tumor microenvironment is an important issue that should be taken into consideration, and to the best of our knowledge there is a lack of reviews on this subject. The tumor microenvironment is not only closely related to the growth and development of CRC but also affects the treatment and prognosis of the patients. Immunotherapy has emerged as a new hope, but, in CRC, it was found that only a small percentage of patients benefit from this treatment being closely dependent on the genetic background of the tumors. The aim of this review was to perform an up-to-date critical literature review on current knowledge regarding the effects of microbiota-derived SCFAs in the tumor microenvironment, particularly in the context of CRC and its impact in CRC therapeutic strategies. SCFAs, namely acetate, butyrate, and propionate, have the ability to modulate the tumor microenvironment in distinct ways. SCFAs promote immune cell differentiation, downregulate the expression of pro-inflammatory mediators, and restrict the tumor-induced angiogenesis. SCFAs also sustain the integrity of basement membranes and modulate the intestinal pH. CRC patients have lower concentrations of SCFAs than healthy individuals. Increasing the production of SCFAs through the manipulation of the gut microbiota could constitute an important therapeutic strategy towards CRC due to their antitumorigenic effect and ability of modulating tumor microenvironment.


Asunto(s)
Neoplasias Colorrectales , Microbioma Gastrointestinal , Humanos , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/metabolismo , Microambiente Tumoral , Ácidos Grasos Volátiles/metabolismo , Butiratos/farmacología
10.
BMC Med Educ ; 23(1): 177, 2023 Mar 22.
Artículo en Inglés | MEDLINE | ID: mdl-36949512

RESUMEN

BACKGROUND: Ultrasound assessment of the airway recently integrates the point-of-care approach to patient evaluation since ultrasound measurements can predict a difficult laryngoscopy and tracheal intubation. Because ultrasonography is performer-dependent, a proper training and assessment tool is needed to increase diagnostic accuracy. An objective, structured assessment ultrasound skill (OSAUS) scale was recently developed to guide training and assess competence. This work aims to study the psychometric properties of OSAUS Scale when used to evaluate competence in ultrasound hyomental distance (HMD) measurement. METHODS: Prospective and experimental study. Volunteers were recruited and enrolled in groups with different expertise. Each participant performed three ultrasonographic HMD evaluation. The performance was videorecorded and anonymized. Five assessors blindly rated participants' performance using OSAUS scale and a Global Rating Scale (GRS). A psychometric study of OSAUS scale as assessment tool for ultrasound HMD competence was done. RESULTS: Fifteen voluntaries participated on the study. Psychometric analysis of OSAUS showed strong internal consistency (Cronbach's alpha 0.916) and inter-rater reliability (ICC 0.720; p < 0.001). The novice group scored 15.4±0.18 (mean±SD), the intermediate 14.3±0.75 and expert 13.6±0.1.25, with a significant difference between novice and expert groups (p = 0.036). The time in seconds to complete the task was evaluated: novice (90±34) (mean±SD), intermediate (84±23) and experts (83±15), with no significant differences between groups. A strong correlation was observed between OSAUS and global rating scale (r = 0.970, p < 0.001). CONCLUSION: The study demonstrated evidence of validity and reliability. Further studies are needed to implement OSAUS scale in the clinical setting for training and assessment of airway ultrasound competence.


Asunto(s)
Competencia Clínica , Humanos , Psicometría , Reproducibilidad de los Resultados , Estudios Prospectivos , Ultrasonografía
11.
Cureus ; 15(2): e34730, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36913226

RESUMEN

Proteinuria is a frequent finding in pediatric patients and in most cases, it is intermittent or transient. When proteinuria is moderate/severe and persistent, it may require an extensive complementary study, histopathological examination and genetic test, in order to clarify its etiology. Cubilin (CUBN) is a large glycosylated extracellular protein, initially detected in proximal tubular cells, and later in podocytes. Isolated persistent proteinuria caused by cubilin gene mutations is rare, only a few cases have been reported in the literature and even fewer patients underwent renal biopsy and electron microscopy that could help to elucidate the pathogenesis of the disease. The authors describe two pediatric clinical cases referred to pediatric nephrology consultation due to persistent proteinuria. Neither of them had any other complaints, and renal function and immunological and serological studies were normal. Renal histopathology showed podocytes changes and glomerular basal membrane alterations suggestive of Alport Syndrome. The genetic study identified two heterozygous variants in the cubilin gene in both, also later identified in their parents. They were started on ramipril, with improvement in proteinuria, and both patients remain asymptomatic and without changes in renal function. At present, due to the uncertainty of prognosis, it is suggested to keep CUBN gene mutation patients under close surveillance of proteinuria and renal function. The variable ultrastructural patterns of podocytopathy and glomerular basal membrane alterations in kidney biopsies of pediatric patients with proteinuria should lead to the diagnostic possibility of CUBN gene mutation in the differential diagnosis.

12.
Front Cell Infect Microbiol ; 13: 1025359, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36743305

RESUMEN

Current therapeutic ways adopted for the treatment of leishmaniasis are toxic and expensive including parasite resistance is a growing problem. Given this scenario, it is urgent to explore treatment alternatives for leishmaniasis. The aim of this study was to evaluate the effect of 3-phenyl-lawsone (3-PL) naphthoquinone on Leishmania (Viannia) braziliensis infection, both in vitro and in vivo, using two local routes of administration: subcutaneous (higher dose) and tattoo (lower dose). In vitro 3-PL showed low toxicity for macrophages (CC50 >3200 µM/48h) and activity against intracellular amastigotes (IC50 = 193 ± 19 µM/48h) and promastigotes (IC50 = 116 ± 26 µM/72h), in which induced increased ROS generation. Additionally, 3-PL up-regulated the production of cytokines such as tumor necrosis factor alpha (TNF-α), monocyte chemotactic protein 1 (MCP-1), interleukin-6 (IL-6) and IL-10 in infected macrophages. However, the anti-amastigote action was independent of nitric oxide production. Treatment of hamsters infected with L. (V.) braziliensis from one week after infection with 3-PL by subcutaneous (25 µg/Kg) or tattooing (2.5 µg/Kg) route, during 3 weeks (3 times/week) or 2 weeks (2 times/week) significantly decreased the parasite load (p<0.001) in the lesion. The reduction of parasite load by 3-PL treatment was comparable to reference drug meglumine antimoniate administered by the same routes (subcutaneous 1mg/Kg and tattoo 0.1mg/Kg). In addition, treatment started from five weeks after infection with 3-PL per tattoo also decreased the parasite load. These results show the anti-leishmanial effect of 3-PL against L. (V.) braziliensis and its efficacy by subcutaneous (higher dose) and tattoo (lower dose) routes. In addition, this study shows that drug delivery by tattooing the lesion allows the use of lower doses than the conventional subcutaneous route, which may support the development of a new therapeutic strategy that can be adopted for leishmaniasis.


Asunto(s)
Antiprotozoarios , Leishmania braziliensis , Leishmaniasis Cutánea , Naftoquinonas , Tatuaje , Cricetinae , Animales , Antimoniato de Meglumina/farmacología , Antimoniato de Meglumina/uso terapéutico , Antiprotozoarios/farmacología , Antiprotozoarios/uso terapéutico , Leishmaniasis Cutánea/tratamiento farmacológico , Leishmaniasis Cutánea/parasitología , Naftoquinonas/farmacología , Naftoquinonas/uso terapéutico , Carga de Parásitos
13.
Cureus ; 15(1): e33670, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36793831

RESUMEN

Hand-foot-mouth syndrome is a common childhood illness. Although occurrence in adults is rare, its incidence has been increasing. In such cases, it usually presents with atypical symptoms. The authors present the case of a 33-year-old male patient who presented with constitutional symptoms, feverish sensation, and macular palmoplantar rash associated with oral and oropharynx ulcers. The epidemiological history revealed exposure to two cohabitants (children) with a recent diagnosis of hand-foot-mouth disease (HFMD).

14.
Cureus ; 15(1): e33480, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36756007

RESUMEN

Amyloidosis is a mainly systemic rare disease and its localized presentation is even less frequent. Systemic forms are often associated with other conditions or entities (such as neoplasms), and a correct etiological study of patients with this disease is essential. A localized presentation has a better prognosis compared to systemic forms, which underlines the importance of a correct diagnosis. Primary localized amyloidosis in the head and neck region is a rare entity. Primary amyloidosis localized to the sinonasal tract is extremely rare. Although uncommon, case reports have been increasing in the face of new endoscopic and imaging techniques, and the report of these cases is crucial for a better characterization of this entity. Symptoms may include epistaxis, nasal obstruction, facial deformity, and vision changes. A 72-year-old female with a history of frequent nasal congestion with two years' duration showed no improvement following symptom management. She was referred for nasal endoscopy and biopsy, thereby confirming the diagnosis of amyloidosis. Further diagnostic testing did not show evidence of systemic disease. This case report was previously presented as a poster presentation at the 19th European Congress of Internal Medicine in March 2021.

15.
Cureus ; 15(1): e33532, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36779111

RESUMEN

Red yeast rice is made by fermenting white rice with the fungus Monascus purpureus. It has lipid-lowering effects due to the presence of monacolin, produced by the fungus, and therefore shares the same biological and side effects as a statin, namely it may cause rhabdomyolysis. In this clinical case study, we report the case of a 50-year-old woman suffering from a sudden onset of chest discomfort and generalized myalgia. Laboratory findings were consistent with the diagnosis of rhabdomyolysis. The patient had been recently diagnosed with dyslipidemia in primary care, and decided to start eating red yeast rice, without informing clinicians. Clinical improvement was rapidly noticed after hydration, and blood sample results returned to normal. Awareness should be raised for the regulation of these products, as their consumption is rising, and patients are unaware of their potential side effects.

16.
Eur Arch Otorhinolaryngol ; 280(6): 2821-2830, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36571613

RESUMEN

PURPOSE: To report biomarkers present in the olfactory mucosa in chronic rhinosinusitis with nasal polyps (CRSwNP) in comparison with nasal polyps and to nasal mucosal tissues from control patients. To evaluate the kinetics of smell over 6 months in patients who underwent Reboot surgery. METHODS: Cohort study from May 2021 to May 2022. We collected samples of olfactory mucosa and nasal polyps from 16 CRSwNP patients and inferior turbinate samples from 20 control subjects. The study was not randomized for surgical and/or medical treatment. Samples were analyzed by Luminex and Unicap 100 to measure biomarkers of inflammation (IL1-ß, IL4, IL5, IL6, IL17, CCL3, CCL4, G-CSF, SE-IgE, total IgE and ECP). 12 of the CRSwNP patients underwent Extended Sniffin'tests at timepoints 1-4 days pre-surgery, and 1, 3 and 6 months after Reboot surgery. RESULTS: Type-2 markers were significantly elevated in OM and polyp tissue in CRSwNP (n = 16) vs. controls (n = 20), P < 0.05. TDI scores improved already 1 month (P < 0.05) after surgery and remained stable for 6 months. Type-2 inflammation in nasal polyps was associated with decreased sense of smell and taste before surgery, but improved after surgery (P = 0.048). Type-3 inflammation was present in the olfactory mucosa and was associated with a better sense of smell before surgery, but a smaller improvement of smell afterward. CONCLUSIONS: Type-2 inflammation is present in the olfactory mucosa in CRSwNP patients and is associated with smell loss. Reboot surgery, aiming to completely remove inflamed sinus mucosa, significantly improves the smell in this group of patients.


Asunto(s)
Pólipos Nasales , Trastornos del Olfato , Rinitis , Sinusitis , Humanos , Olfato , Pólipos Nasales/complicaciones , Pólipos Nasales/cirugía , Estudios Prospectivos , Trastornos del Olfato/complicaciones , Estudios de Cohortes , Rinitis/complicaciones , Rinitis/cirugía , Sinusitis/complicaciones , Sinusitis/cirugía , Inflamación/complicaciones , Enfermedad Crónica , Inmunoglobulina E
17.
Pharmaceutics ; 14(11)2022 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-36365177

RESUMEN

The colon microbiota is an important player in colorectal cancer (CRC) development, which is responsible for most of the cancer-related deaths worldwide. During carcinogenesis, the colon microbiota composition changes from a normobiosis profile to dysbiosis, interfering with the production of short-chain fatty acids (SCFAs). Each SCFA is known to play a role in several biological processes but, despite their reported individual effects, colon cells are exposed to these compounds simultaneously and the combined effect of SCFAs in colon cells is still unknown. Our aim was to explore the effects of SCFAs, alone or in combination, unveiling their biological impact on CRC cell phenotypes. We used a mathematical model for the prediction of the expected SCFA mixture effects and found that, when in mixture, SCFAs exhibit a concentration addition behavior. All SCFAs, alone or combined at the physiological proportions founded in the human colon, revealed to have a selective and anticancer effect by inhibiting colony formation and cell proliferation, increasing apoptosis, disturbing the energetic metabolism, inducing lysosomal membrane permeabilization, and decreasing cytosolic pH. We showed for the first time that SCFAs are specific towards colon cancer cells, showing promising therapeutic effects. These findings open a new road for the development of alternatives for CRC therapy based on the increase in SCFA levels through the modulation of the colon microbiota composition.

18.
Food Funct ; 13(18): 9183-9194, 2022 Sep 22.
Artículo en Inglés | MEDLINE | ID: mdl-35996962

RESUMEN

An unbalanced diet is one of the well-known risk factors for the development of colorectal cancer (CRC). This type of cancer is currently the main cause of cancer-related deaths worldwide, urging the need for new and more effective preventive and therapeutic approaches. It is already known that CRC patients have alterations in the microbial community and metabolism. In this regard, a concept that has been recently attracting the attention of the scientific community is the development of functional food or nutraceuticals, as a new and more effective strategy to overcome CRC patient-associated dysbiosis. Particularly, dairy product enriched diets are the major dairy source of dietary calcium, vitamin D and folate intake, which are well-known to have a protective effect against CRC development. In addition, these products are rich in both pre- and probiotics, constituting a double strategy to modulate both the intestinal microbiota composition and the production of microbial metabolites. Short-chain fatty acids (SCFA), namely, acetate, butyrate, and propionate, are major contributors to colonic homeostasis since they regulate several biological and metabolic processes. In this review, we performed a state of art study concerning the use of dietary patterns, specifically the dairy-derived diet, in the modulation of the human microbiota and their potential use as pre-, pro- or synbiotics for the development of new preventive and therapeutic strategies for CRC.


Asunto(s)
Neoplasias Colorrectales , Microbioma Gastrointestinal , Butiratos , Calcio de la Dieta , Neoplasias Colorrectales/prevención & control , Dieta , Ácidos Grasos Volátiles , Ácido Fólico , Humanos , Propionatos , Vitamina D/uso terapéutico
19.
Front Med (Lausanne) ; 9: 869771, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35783614

RESUMEN

Objective: Selective one-lung ventilation used to optimize neonatal and pediatric surgical conditions is always a demanding task for anesthesiologists, especially during minimally invasive thoracoscopic surgery. This study aims to introduce an ultrasound-guided bronchial intubation and exclusion technique in a pediatric animal model. Methods: Seven rabbits were anesthetized and airway ultrasound acquisitions were done. Results: Tracheal tube progression along the trachea to the right bronchus and positioning of the bronchial blocker in the left bronchus were successfully done with consistent ultrasound identification of relevant anatomical structures. Conclusion: The study provided a new application of ultrasound in airway management. More advanced experimental studies are needed since this technique has the potential for translation to pediatric anesthesia.

20.
Molecules ; 27(14)2022 Jul 19.
Artículo en Inglés | MEDLINE | ID: mdl-35889486

RESUMEN

Trichloroanisole (TCA) in wine results in a sensory defect called "cork taint", a significant problem for the wine industry. Wines can become contaminated by TCA absorption from the atmosphere through contaminated wood barrels, cork stoppers, and wood pallets. Air-depleted solvent-impregnated (ADSI) cork powder (CP) was used to mitigate TCA in wines. The ADSI CP (0.25 g/L) removed 91% of TCA (6 ng/L levels), resulting in an olfactory activity value of 0.14. A Freundlich isotherm described ADSI CP TCA adsorption with irreversible adsorption and a KF = 33.37. ADSI CP application had no significant impact on the phenolic profile and chromatic characteristics of red wine. Using headspace sampling with re-equilibration, an average reduction in the volatile abundance of 29 ± 15%, 31 ± 19%, and 37 ± 24% was observed for the 0.10, 0.25, and 0.50 g/L ADSI CP, respectively. The alkyl esters and acids were the most affected. The impact observed was much lower when using headspace sampling without re-equilibration. Isoamyl acetate, ethyl hexanoate, ethyl hexanoate, and ethyl decanoate abundances were not significantly different from the control wine and 0.25 g/L ADSI CP application. Thus, ADSI CP can be a new sustainable fining agent to remove this "off-flavor" from wine, with a reduced impact on the wine characteristics.


Asunto(s)
Vino , Anisoles/análisis , Polvos , Solventes , Vino/análisis
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...