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1.
Foods ; 13(5)2024 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-38472921

RESUMO

Frozen yogurts contain yogurt culture bacteria, which might impart health benefits to their consumers. Global frozen yogurt market sales are expected to grow by 4.8% by 2028, which represents an important opportunity for the industry, consumers and researchers. Polyphenols are metabolites found in plants which have antioxidant and anti-inflammatory properties and might prevent chronic diseases such as cancer, diabetes and cardiovascular diseases. The objective of this study was to elucidate the effect of the polyphenol hesperidin on the physico-chemical, microbiological and sensory characteristics of frozen yogurts. Hesperidin was incorporated into frozen yogurt at three concentrations (125, 250 and 500 mg/90 g of product), while yogurt with no hesperidin was used as a control. The viscosity and overrun of the frozen yogurt were analyzed on day 0. The hardness, pH, color and Lactobacillus bulgaricus and Streptococcus thermophilus counts were determined after 0, 30 and 60 d. The melting rate was determined at 60 and 90 min after 0, 30 and 60 d. The bile and acid tolerances of both S. thermophilus and L. bulgaricus were measured after 7 and 60 d. A hedonic scale of nine points was used to measure sensory attributes. Data were analyzed at α = 0.05 with an ANOVA with Tukey's adjustment, and McNemar's test was used to analyze purchase intent. Hesperidin did not influence the pH, overrun or microbial characteristics. Polyphenol addition compared to the control decreased the melting rate but increased the hardness and bile tolerance of L. bulgaricus, as well as the L* and b* values. The sensory characteristics were not influenced by the lowest concentration of hesperidin, as it was not statistically different from the control. Moreover, consumers were interested in purchasing frozen yogurt with added hesperidin after learning about the health claim. This study can assist in the development of a healthier frozen yogurt in an increasingly competitive market.

2.
Pharmaceuticals (Basel) ; 16(11)2023 Oct 24.
Artigo em Inglês | MEDLINE | ID: mdl-38004377

RESUMO

The impact of yogurts made with starter culture bacteria (L. bulgaricus and S. thermophilus) and supplemented with ingredients (maitake mushrooms, quercetin, L-glutamine, slippery elm bark, licorice root, N-acetyl-D-glucosamine, zinc orotate, and marshmallow root) that can help treat leaky gut were investigated using the Caco-2 cell monolayer as a measure of intestinal barrier dysfunction. Milk from the same source was equally dispersed into nine pails, and the eight ingredients were randomly allocated to the eight pails. The control had no ingredients. The Caco-2 cells were treated with isoflavone genistein (negative control) and growth media (positive control). Inflammation was stimulated using an inflammatory cocktail of cytokines (interferon-γ, tumor necrosis factor-α, and interleukin-1ß) and lipopolysaccharide. The yogurt without ingredients (control yogurt) was compared to the yogurt treatments (yogurts with ingredients) that help treat leaky gut. Transepithelial electrical resistance (TEER) and paracellular permeability were measured to evaluate the integrity of the Caco-2 monolayer. Transmission electron microscopy (TEM), immunofluorescence microscopy (IM), and real-time quantitative polymerase chain reaction (RTQPCR) were applied to measure the integrity of tight junction proteins. The yogurts were subjected to gastric and intestinal digestion, and TEER was recorded. Ferrous ion chelating activity, ferric reducing potential, and DPPH radical scavenging were also examined to determine the yogurts' antioxidant capacity. Yogurt with quercetin and marshmallow root improved the antioxidant activity and TEER and had the lowest permeability in fluorescein isothiocyanate (FITC)-dextran and Lucifer yellow flux among the yogurt samples. TEM, IM, and RTQPCR revealed that yogurt enhanced tight junction proteins' localization and gene expression. Intestinal digestion of the yogurt negatively impacted inflammation-induced Caco-2 barrier dysfunction, while yogurt with quercetin, marshmallow root, maitake mushroom, and licorice root had the highest TEER values compared to the control yogurt. Yogurt fortification with quercetin, marshmallow root, maitake mushroom, and licorice root may improve functionality when dealing with intestinal barrier dysfunction.

3.
Microorganisms ; 11(4)2023 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-37110316

RESUMO

Consumers are becoming aware of functional ingredients such as medicinal herbs, polyphenols, mushrooms, amino acids, proteins, and probiotics more than ever before. Like yogurt and its probiotics, L-glutamine, quercetin, slippery elm bark, marshmallow root, N-acetyl-D-glucosamine, licorice root, maitake mushrooms, and zinc orotate have demonstrated health benefits through gut microbiota. The impact of these ingredients on yogurt starter culture bacteria characteristics is not well known. The objective of this study was to determine the influence of these ingredients on the probiotic characteristics, tolerance to gastric juices and lysozyme, protease activity, and viability of Streptococcus thermophilus STI-06 and Lactobacillus bulgaricus LB-12. Acid tolerance was determined at 0, 30, 60, 90, and 120 min of incubation, whereas bile tolerance was analyzed at 0, 4, and 8 h. The microbial growth was determined at 0, 2, 4, 6, 8, 10, 12, 14, and 16 h of incubation, while protease activity was evaluated at 0, 12, and 24 h. The application of marshmallow root, licorice root, and slippery elm bark improved bile tolerance and acid tolerance of S. thermophilus. These ingredients did not impact the bile tolerance, acid tolerance, and simulated gastric juice tolerance characteristics of L. bulgaricus over 8 h and 120 min (respectively) of incubation. Similarly, the growth of S. thermophilus and L. bulgaricus was not affected by any of these functional ingredients. The application of marshmallow root, N-acetyl-D-glucosamine, and maitake mushroom significantly increased the protease activity of S. thermophilus, whereas the protease activity of L. bulgaricus was not affected by any ingredient. Compared to the control, marshmallow root and quercetin samples had higher mean log counts and log counts for S. thermophilus on the simulated gastric juice and lysozyme resistance in vitro test, respectively. For L. bulgaricus, licorice root, quercetin, marshmallow root, and slippery elm bark samples had higher log counts than the control samples.

4.
J Dairy Sci ; 106(6): 3868-3883, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37080788

RESUMO

l-Glutamine, quercetin, slippery elm bark, marshmallow root, N-acetyl-d-glucosamine, licorice root, maitake mushrooms, and zinc orotate have been reported to help treat leaky gut. The purpose of this research was to explore the impact of these functional ingredients on the physico-chemical, microbiological, and sensory properties of yogurt. The milk from same source was equally divided into 9 pails and the 8 ingredients were randomly assigned to the 8 pails. The control had no ingredient. Milk was fermented to yogurt. The pH, titratable acidity, syneresis, viscosity, color (L*, a*, b*, C*, and h*), Streptococcus thermophilus counts, and Lactobacillus delbrueckii spp. bulgaricus counts of yogurts were determined on d 1, 7, 14, 21, 28, 35, and 42, whereas coliform counts, yeast and mold counts, and rheological characteristics were determined on d 1 and 42. The sensory study was performed on d 3 and particle size of the functional ingredients (powder form) was also determined. When compared with control, the incorporation of slippery elm bark into yogurts led to less syneresis. l-Glutamine increased pH and n' values (relaxation exponent derived from G') and lowered titratable acidity values. N-Acetyl-d-glucosamine incorporation resulted in higher n' and lower titratable acidity values, whereas maitake mushroom led to lower n' values. Incorporating quercetin increased the growth of L. bulgaricus. Adding maitake mushrooms increased the growth of S. thermophilus but lowered apparent viscosity values, whereas quercetin decreased its S. thermophilus counts. Quercetin decreased L* and a* values but increased b* values, and maitake mushroom increased a* values. Thixotropic behavior increased with the addition of licorice root and quercetin. Adding slippery elm bark, N-acetyl-d-glucosamine, licorice root, maitake mushrooms, and zinc orotate into yogurt did not affect the sensory properties, whereas yogurts with quercetin had the lowest sensory scores. Overall, most of these ingredients did not cause major changes to yogurt properties.


Assuntos
Iogurte , Animais , Glutamina/análise , Quercetina/análise , Iogurte/análise
5.
J Immigr Minor Health ; 24(1): 10-17, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34850318

RESUMO

Associations between social determinants of health (SDOH), demographic factors including preferred language, and SARS-CoV-2 detection are not clear. We conducted a retrospective cohort study among those seeking testing for SARS-CoV-2 at a multi-site, urban community health center. Logistic regression and exact matching methods were used to identify independent predictors of SARS-CoV-2 detection among demographic, SDOH, and neighborhood-level variables. Of 1,361 included individuals, SARS-CoV-2 was detected among 266 (19.5%). Logistic regression demonstrated that SARS-CoV-2 detection was less likely in White participants relative to Hispanic participants (adjusted odds ratio [aOR] 0.18, 95% confidence interval [CI] 0.05-0.46). and more likely in patients who prefer Spanish relative to those that prefer English (aOR 2.04, 95% CI 1.43-2.96). No observed SDOH predicted SARS-CoV-2 detection in adjusted models. A robustness analysis using a matched subset of the study sample produced findings similar to those in the main analysis. Preferring to receive care in Spanish is an independent predictor of SARS-CoV-2 detection in a community health center cohort.


Assuntos
COVID-19 , Estudos de Coortes , Centros Comunitários de Saúde , Humanos , Estudos Retrospectivos , SARS-CoV-2 , Determinantes Sociais da Saúde
6.
Int Orthod ; 19(4): 622-632, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34507915

RESUMO

PURPOSE: The aim of this study is to evaluate craniofacial characteristics and upper airway morphology in adolescents with Attention Deficit Disorder with Hyperactivity (ADHD) compared to controls (CON). MATERIALS AND METHODS: Records from July 2014 to May 2018 of patients who were seeking orthodontic treatment at a single institute and had full pre-treatment orthodontic records including cone-beam computed tomography (CBCT) were reviewed. Comprehensive cephalometric variables were measured to determine craniofacial morphology. Upper airway volume (UAV), minimum cross-sectional area (MCA), and linear measurements were calculated at multiple planes. RESULTS: A total of 87 adolescents (ADHD, 29; CON, 58) were included in the study. Overall, UAV and MCA in ADHA group were smaller than CON. Statistical significance was evident in airway widths at planes A (P=0.002), C (P=0.042), and D (P<0.001), and airway area at plane D (lower hypopharynx) (P<0.001), with the ADHD group showing narrower widths and area compared to CON. The most common skeletal classification in the ADHD group was sequenced as Class II, Class I then Class III, with percentages of (58.6%), (31%) and (10.3%), respectively. No significant differences were found between the groups for any of the skeletal, dental, and soft tissue cephalometric variables. CONCLUSIONS: ADHD affected adolescents have similar craniofacial characteristics, but narrower upper airway dimensions compared to controls. Further investigations with larger samples are warranted to further elucidate the relationship between SDB and ADHD.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade , Adolescente , Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico por imagem , Cefalometria , Tomografia Computadorizada de Feixe Cônico , Humanos , Imageamento Tridimensional , Estudos Retrospectivos
8.
J Appl Gerontol ; 40(6): 598-608, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-32500792

RESUMO

Senior care providers are increasingly focused on hospitality to distinguish themselves from competitors. A mixed-methods approach was used to examine perceptions of hospitality from leadership (i.e., administrators of nursing homes and assisted living facilities) and use of hospitality practices across settings and lines of service. Results indicated that hospitality practices readily exist in senior care settings (i.e., nursing homes, assisted living facilities), but may be referred to by names other than hospitality. There also appear to be more similarities than differences in practices across long-term care service lines (i.e., short- and long-stay nursing home residents, assisted living), suggesting that, regardless of provider type, hospitality in senior care is becoming part of the expected culture and cadre of services for residents. Overall, findings suggest hospitality practices are related to providers' census, payer mix, and organizational performance.


Assuntos
Moradias Assistidas , Liderança , Humanos , Casas de Saúde , Percepção
9.
Popul Health Manag ; 24(1): 141-148, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-32096695

RESUMO

To characterize optimal strategies for screening for social determinants of health (SDOH) among children, the authors performed a cross-sectional study of parents and adolescents ages ≥13 years in a community health center. Participants were queried about how they prefer to receive information about social needs resources and 2 screening instruments were compared: Well Child Care, Evaluation, Community Resources, Advocacy, Referral, Education (WE CARE) and Accountable Health Communities (AHC). In July 2019, 154 parents and 21 adolescents were surveyed. Surveys were administered via tablet and required 5.6 minutes (standard deviation [SD] 3.9 minutes) for parents and 3.9 minutes (SD 1.4 minutes) for adolescents to complete. Parents identified technology (text message, email) and informational printouts as preferred mechanisms for information receipt (58% and 32% of participants, respectively); adolescents preferred text message (57%) and printouts (19%). Few (<10% overall) preferred in-person consultation with a care coordinator. Adolescent/parent pairs (n = 19 pairs) agreed, on average across SDOH, 82% of the time for WE CARE and 85% for AHC. AHC elicited more positive screens than WE CARE for housing insecurity (12% of parents versus 7%) and food insecurity (47% versus 16%) but fewer positive screens than WE CARE for difficulties paying for utilities (27% versus 39%). Routine screening for SDOH in children requires 2-3 minutes per screening instrument. Screening can target parents of young children and either adolescents themselves or their parents. Families prefer to receive information about meeting social needs via technologically-based methods as opposed to in-person consultation with enabling services providers.


Assuntos
Preferência do Paciente , Determinantes Sociais da Saúde , Adolescente , Pré-Escolar , Estudos Transversais , Humanos , Programas de Rastreamento , Encaminhamento e Consulta
10.
Popul Health Manag ; 24(3): 345-352, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-32639198

RESUMO

Risk-stratification strategies are needed for ambulatory pediatric populations. The authors sought to develop age-specific risk scores that predict high health care costs among an urban population. A retrospective cohort study was performed of children ages 1-18 years who received care at Fair Haven Community Health Care (FHCHC), a community health center in New Haven, Connecticut. Cost was estimated from charges in the electronic health record (EHR), which is shared with the only hospital system in the city. Using multivariable logistic regression models, independent predictors of being in the top decile of total charges during the 2017 calendar year were identified, drawing from covariates collected from the EHR prior to 2017. Random forest modeling was used to verify the feature importance of significant covariates and model performance from 2017 cost data were compared to those using 2018 cost data. Regression models were used to construct age-specific nomograms to predict cost. Among 8960 children who received care at FHCHC in the 18 months prior to 2017, covariate frequencies clustered in age groups 1-5 years, 6-11 years, and 12-18 years, so 3 age-specific models were constructed. Prior utilization variables predicted future costs, as did younger children who received specialty care and older children with behavioral health diagnoses. Final models for each age group had C statistics ≥0.68 using both 2017 and 2018 cost data. Prediction models can draw from elements accessible in the EHR to predict cost of ambulatory pediatric patients. Strategies to impact utilization among high-risk children are needed.


Assuntos
Custos de Cuidados de Saúde , Pediatria , Adolescente , Criança , Pré-Escolar , Estudos de Coortes , Centros Comunitários de Saúde , Humanos , Lactente , Estudos Retrospectivos , Fatores de Risco
11.
Mil Med ; 185(9-10): e1411-e1416, 2020 09 18.
Artigo em Inglês | MEDLINE | ID: mdl-32617569

RESUMO

INTRODUCTION: The Veterans Health Administration (VHA) is a national leader in integrated care, known in the VHA as the Primary Care Mental Health Integration (PCMHI) model. This model is associated with improved quality of services and same-day access for veterans. There has been some recent development of PCMHI/integrated care competencies within VHA and across the nation. To fully implement these competencies, however, PCMHI providers must not only be trained, but their adherence to the PCMHI model must also be assessed. While there have been recent advances, there has been little research that has examined the adherence of PCMHI providers to the model or methods to improve adherence. MATERIALS AND METHODS: The present study sought to examine and improve the clinical practice of a team of eight PCMHI providers to make practice more adherent to the PCMHI model. This study was conducted at a large Midwestern VA Medical Center using interventions based in assessment, feedback, and training-measured at three points in time. The Primary Care Behavioral Health Provider Adherence Questionnaire (PPAQ; Beehler GP, Funderburk JS, Possemato K, et al.: Psychometric assessment of the primary care behavioral health provider adherence questionnaire (PPAQ). Transl Behav Med 2013; 3: 379-91.) was used to assess provider adherence and the PPAQ toolkit was used to provide tailored recommendations for improving provider practice. In addition, the VHA "Foundations Manual" and Functional Tool outlined essential behavioral targets that are consistent with the PCMHI model and the "essential provider behaviors" from the PPAQ. A combination of individual and group interventions was presented and adherence, pre and post, was assessed with the PPAQ and with evaluation of clinical practice data. RESULTS: Results indicated that the behavior of PCMHI providers changed over time, with providers exhibiting more PCMHI consistent behaviors and fewer inconsistent behaviors. Adherence to the PCMHI model increased. CONCLUSION: Providing assessment, feedback, and training in the PCMHI model changed the clinical practice of PCMHI providers and resulted in improved adherence. Clinical and research implications are discussed.


Assuntos
Prestação Integrada de Cuidados de Saúde , Transtornos Mentais , Serviços de Saúde Mental , Humanos , Saúde Mental , Atenção Primária à Saúde
12.
Am J Clin Oncol ; 43(8): 591-597, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32482952

RESUMO

OBJECTIVES: Pancreatic adenocarcinoma is frequently associated with pain requiring opioid therapy. Opioids, however, have been implicated in causing tumor progression, ultimately shortening survival. We examined the impact of pain, opioid use, and the mu-opioid receptor (MOP-R) expression in tumor tissue on progression-free survival and overall survival of patients with metastatic pancreatic cancer. METHODS: We identified 103 patients with metastatic pancreatic adenocarcinoma receiving chemotherapy and abstracted data from Tumor Registry, in addition to pain, opioid exposure, carbohydrate antigen 19-9 values, survival, and imaging response. MOP-R expression was evaluated using an immunohistochemistry assay. The association of variables with progression-free survival and overall survival was analyzed in univariate and multivariate models. RESULTS: Patients with low opioid use (<5 mg oral morphine equivalent/d) survived longer than patients with high opioid (HO) use (≥5 mg oral morphine equivalent/d) (median overall survival of 315 vs. 150 d; hazard ratio [HR]=1.79; 95% confidence interval [CI]: 1.13, 2.84). This effect persisted on multivariate models (adjusted HR=2.76; 95% CI: 1.39, 5.48). Low opioid patients tended to respond better to treatment than HO patients, based on carbohydrate antigen 19-9. Patients with low MOP-R expression had longer median survival (230 vs. 193 d), though the HR was not significant (1.15; 95% CI: 0.71, 1.88). Baseline pain was not associated with outcomes. CONCLUSION: In patients with metastatic pancreatic adenocarcinoma, HO use is associated with decreased survival, but the severity of baseline pain and MOP-R expression score in tumor tissue does not correlate with clinical outcomes.


Assuntos
Adenocarcinoma/metabolismo , Adenocarcinoma/patologia , Analgésicos Opioides/farmacologia , Analgésicos Opioides/uso terapêutico , Dor do Câncer/tratamento farmacológico , Neoplasias Pancreáticas/metabolismo , Neoplasias Pancreáticas/patologia , Receptores Opioides mu/biossíntese , Receptores Opioides mu/efeitos dos fármacos , Adenocarcinoma/mortalidade , Adenocarcinoma/secundário , Adulto , Idoso , Idoso de 80 Anos ou mais , Progressão da Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Neoplasias Pancreáticas/mortalidade , Intervalo Livre de Progressão , Estudos Retrospectivos , Taxa de Sobrevida
13.
Oral Maxillofac Surg Clin North Am ; 32(2): 197-204, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32165093

RESUMO

Nasoalveolar molding (NAM) is a powerful tool in the treatment of patients with unilateral or bilateral cleft lip and palate. The primary goal of NAM is to improve alignment of critical anatomic elements before surgical repair of the unilateral or bilateral cleft lip. Modifications of the position of the alveolar segments and their associated lip elements, the lower lateral cartilages, and the columella achieved with NAM are helpful for creating a suitable platform for tension-free lip repair.


Assuntos
Fenda Labial/cirurgia , Fissura Palatina/cirurgia , Cartilagem , Humanos , Lactente , Nariz , Cuidados Pré-Operatórios
14.
J Addict Med ; 14(6): 489-493, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32039936

RESUMO

OBJECTIVE: To investigate the relationship between loneliness and non-prescribed opioid use in patients diagnosed with opioid use disorder (OUD). METHODS: This was a cohort study conducted at a federally qualified health center (FQHC) in New Haven, CT. Patients who were treated for OUD by health center providers and prescribed buprenorphine were eligible. Participants were asked to complete the UCLA-Loneliness Scale Version 3. From the electronic medical record, we collected patient demographic and clinical characteristics as well as the results of biological fluid testing obtained throughout their treatment course since entry into care. Multivariable logistic regression was performed to identify independent predictors of the detection of non-prescribed opioids within biological fluid. RESULTS: Of the 82 patients enrolled in the study, 33 (40.3%) of the participants had at least 1 biological fluid test positive for non-prescribed opioids after maintenance onto buprenorphine treatment. A higher loneliness score was associated with increased odds of non-prescribed opioids (adjusted odds ratio 1.16; 95% confidence interval 1.06-1.27). Patient age, the number of problems on the problems list, and cocaine use were also positively associated with the presence of non-prescribed opioids whereas having diabetes was negatively associated. CONCLUSIONS: Among the individuals being treated with buprenorphine for OUD, loneliness may be a risk factor for the use of non-prescribed opioids or treatment failure.


Assuntos
Buprenorfina , Transtornos Relacionados ao Uso de Opioides , Analgésicos Opioides/uso terapêutico , Buprenorfina/uso terapêutico , Estudos de Coortes , Humanos , Solidão , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Transtornos Relacionados ao Uso de Opioides/epidemiologia
16.
Qual Life Res ; 29(5): 1229-1238, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-31898111

RESUMO

PURPOSE: Quality of life has been defined in various ways by nursing home stakeholders over the years. As such, analyzing the levels of agreement or disagreement among these stakeholders to ascertain if staff and leadership align with resident-identified factors for "good" quality of life has become important to include in the literature. This study sought to identify contributory factors to resident quality of life, as well as analyze areas of commonality in qualitative responses. METHODS: Semi-structured interviews were conducted at 46 Midwestern nursing homes, with residents (n = 138), nursing assistants (n = 138), social workers (n = 46), activities directors (n = 46), and administrators (n = 46), on whether each stakeholder felt residents had a good quality of life and the factors contributing to resident quality of life. RESULTS: Overall, the majority of residents perceived their quality of life as "good," though differences were noted in their main contributing factors when compared to staff members' and management's perspectives. Findings also demonstrated that nursing assistants most closely aligned with resident perspectives. CONCLUSIONS: Given the implications of resident satisfaction with quality of life on multiple facets of a nursing home (e.g., survey process, financial reimbursement), it remains ever critical for management to engage residents and to truly listen to resident perspectives to enhance and ensure an optimal quality of life.


Assuntos
Casas de Saúde/normas , Qualidade de Vida/psicologia , Idoso , Estudos de Avaliação como Assunto , Feminino , Humanos , Masculino
18.
J Health Care Poor Underserved ; 30(4): 1249-1251, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31680095
19.
J Vib Acoust ; 1412019.
Artigo em Inglês | MEDLINE | ID: mdl-31555040

RESUMO

Graphene has been known to possess exceptional mechanical properties, including its extremely high Young's modulus and atomic layer thickness. Although there are several reported fiber optic pressure sensors using graphene film, a key question that is not well understood is how the suspended graphene film interacts with the backing air cavity and affects the sensor performance. Based on our previous analytical model, we will show that the sensor performance suffers due to the significantly reduced mechanical sensitivity by the backing cavity. To remedy this limitation, we will, through experimental and numerical methods, investigate two approaches to enhance the sensitivity of fiber optic acoustic pressure sensors using graphene film. First, a graphene-silver composite diaphragm is used to enhance the optical sensitivity by increasing the reflectivity. Compared with a sensor with pure graphene diaphragm, graphene-silver composite can enhance the sensitivity by threefold, while the mechanical sensitivity is largely unchanged. Second, a fiber optic sensor is developed with enlarged backing air volume through the gap between an optical fiber and a silica capillary tube. Experimental results show that the mechanical sensitivity is increased by 10× from the case where the gap side space is filled. For both approaches, signal-to-noise ratio (SNR) is improved due to the enhanced sensitivity, and COMSOL Thermoviscous acoustics simulation compares well with the experimental results. This study is expected to not only enhance the understanding of fluid-structural interaction in sensor design but also benefit various applications requiring high-performance miniature acoustic sensors.

20.
Fam Syst Health ; 37(1): 56-61, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30614722

RESUMO

INTRODUCTION: Cognitive impairment is a growing concern that is costly for individuals and health care systems and is often undiagnosed. Early recognition of cognitive impairment allows patients and families the opportunity to discuss long-term care planning and to arrange financial and legal affairs. Identification of cognitive impairment allows for better evaluation and accommodation of functional deficits. Most individuals with cognitive impairment receive care exclusively through primary care. Primary care providers are typically overburdened, and subsequently cognitive impairment may be unrecognized and untreated. Efficient methods of detecting cognitive impairment are needed in primary care. METHOD: The present investigation examined the effect of a simple marketing strategy on the frequency of referral for cognitive screening in primary care. The frequency of referral for cognitive screening was measured for the 12 months prior to and following the marketing effort. Data for the period 2 years after the marketing effort were examined to determine if increases in referral for cognitive screening were maintained. RESULTS: Results demonstrate that this modest marketing effort significantly increased the number of individuals who were referred for cognitive impairment screening, and this increase was maintained over time. Also, the majority of those who were evaluated screened positive for cognitive impairment. DISCUSSION: This brief marketing effort increased the frequency of referral for cognitive screening and identified individuals with cognitive impairment in primary care. Implications for future research and for management of cognitive impairment in primary care are detailed. (PsycINFO Database Record (c) 2019 APA, all rights reserved).


Assuntos
Disfunção Cognitiva/diagnóstico , Marketing/métodos , Programas de Rastreamento/métodos , Atenção Primária à Saúde/métodos , Adulto , Idoso , Disfunção Cognitiva/psicologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Minnesota , Assistência Centrada no Paciente/métodos , Encaminhamento e Consulta/normas , Encaminhamento e Consulta/tendências , Estudos Retrospectivos
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