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1.
Sci Rep ; 14(1): 9195, 2024 04 22.
Artigo em Inglês | MEDLINE | ID: mdl-38649707

RESUMO

The development of novel antioxidant compounds with high efficacy and low toxicity is of utmost importance in the medicine and food industries. Moreover, with increasing concerns about the safety of synthetic components, scientists are beginning to search for natural sources of antioxidants, especially essential oils (EOs). The combination of EOs may produce a higher scavenging profile than a single oil due to better chemical diversity in the mixture. Therefore, this exploratory study aims to assess the antioxidant activity of three EOs extracted from Cymbopogon flexuosus, Carum carvi, and Acorus calamus in individual and combined forms using the augmented-simplex design methodology. The in vitro antioxidant assays were performed using DPPH and ABTS radical scavenging approaches. The results of the Chromatography Gas-Mass spectrometry (CG-MS) characterization showed that citral (29.62%) and niral (27.32%) are the main components for C. flexuosus, while D-carvone (62.09%) and D-limonene (29.58%) are the most dominant substances in C. carvi. By contrast, ß-asarone (69.11%) was identified as the principal component of A. calamus (30.2%). The individual EO exhibits variable scavenging activities against ABTS and DPPH radicals. These effects were enhanced through the mixture of the three EOs. The optimal antioxidant formulation consisted of 20% C. flexuosus, 53% C. carvi, and 27% A. calamus for DPPHIC50. Whereas 17% C. flexuosus, 43% C. carvi, and 40% A. calamus is the best combination leading to the highest scavenging activity against ABTS radical. These findings suggest a new research avenue for EOs combinations to be developed as novel natural formulations useful in food and biopharmaceutical products.


Assuntos
Acorus , Antioxidantes , Carum , Cymbopogon , Óleos Voláteis , Extratos Vegetais , Cymbopogon/química , Óleos Voláteis/farmacologia , Óleos Voláteis/química , Antioxidantes/farmacologia , Antioxidantes/química , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Acorus/química , Carum/química , Cromatografia Gasosa-Espectrometria de Massas , Compostos de Bifenilo/antagonistas & inibidores , Compostos de Bifenilo/química , Sequestradores de Radicais Livres/química , Sequestradores de Radicais Livres/farmacologia
2.
Healthcare (Basel) ; 12(7)2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38610165

RESUMO

The transition to college is a period of higher risk of the development of eating disorders, with nutrition/dietetics students representing a group of particular vulnerability. Hence, it is interesting to assess eating disorders, taking into consideration potential sources of bias, including social desirability. Our aims were to compare the risk of eating disorders between students of nutrition/dietetics and those attending other courses and to study potential social desirability biases. A total of 799 higher education students (81.7% females) aged 18 to 27 years old completed a questionnaire assessing the risk of eating disorders (EAT-26) and social desirability (composite version of the Marlowe-Crowne Social Desirability Scale). The proportion of students with a high risk of eating disorders was higher among females (14.5% vs. 8.2%, p = 0.044). Nutrition/dietetics students did not differ from those attending other courses regarding the risk of eating disorders. The social desirability bias when assessing the risk of eating disorders was overall low (EAT-26 total score: r = -0.080, p = 0.024). Social desirability correlated negatively with the Diet (r = -0.129, p < 0.001) and Bulimia and food preoccupation subscales (r = -0.180, p < 0.001) and positively with Oral self-control (r = 0.139, p < 0.001).

3.
Soc Sci Res ; 119: 102990, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38609309

RESUMO

Scholarly research has consistently shown that teachers present negative assessments of and attitudes toward migrant students. However, previous studies have not clearly addressed the distinction between implicit and explicit prejudices, or identified their underlying sources. This study identifies the explicit and implicit prejudices held by elementary and middle school teachers regarding the learning abilities of an ethnic minority group: Haitian students within the Chilean educational system. We use a list experiment to assess how social desirability and intergroup attitudes toward minority students influence teachers' prejudices. The findings reveal that teachers harbor implicit prejudices towards Haitian students and are truthful in reporting their attitudes, thereby contradicting the desirability bias hypothesis. We suggest that teachers rely on stereotypes associated with the students' nationality when assessing Haitian students' learning abilities. The implications of these results are discussed in relation to theories grounded in stereotypes and intergroup attitudes.


Assuntos
Etnicidade , Migrantes , Humanos , Haiti , Desejabilidade Social , Grupos Minoritários , Preconceito , Estudantes
4.
Assessment ; : 10731911241245789, 2024 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-38606877

RESUMO

Social desirability bias is a methodological challenge with participant self-reports. Social desirability measures are often used to control the potential effects of social desirability bias on participant self-reports, but whether these measures are interpreted similarly across different demographic groups remains unclear. This study examines the factor structure and measurement invariance of the Children's Social Desirability Scale-Short version (CSD-S) across gender, grade level, and race/ethnicity with a large sample of children and adolescents in the United States. Results indicate a close fit to a one-factor model. Tests of measurement invariance show partial strong invariance across gender (male vs. female) and grade level (elementary vs. middle vs. high schoolers) as well as strong invariance across race/ethnicity (Asian vs. Black/African American vs. Hispanic/Latine vs. White vs. Bi/Multiracial). Latent mean differences were found across grade level and race/ethnicity but not gender, with lower grades reporting higher social desirability than upper grades and Bi/Multiracials reporting lower social desirability than Asians and Hispanics/Latines. Findings provide preliminary evidence for the use of CSD-S in detecting social desirability bias and assessing meaningful social desirability differences in diverse children and adolescents.

5.
Work ; 2024 Feb 06.
Artigo em Inglês | MEDLINE | ID: mdl-38339948

RESUMO

BACKGROUND: Self-reported test is one of the main psychosocial risk assessment tools. However, this test it is susceptible to certain sources of error, including social desirability. Since psychosocial risks are emerging, there are not many studies on their assessment. OBJECTIVE: The aim of this work is to analyze the impact of social desirability on the short version of the CopSoq-ISTAS 21 assessment tool. METHOD: A total of 563 workers (45.10% women and 54.90% men) participated in this study. The short version of the CoPsoQ-Istas21 questionnaire with four Likert scale questions as markers, which correspond to the Eysenck Personality Lie Scale Questionnaire Revised (EPQ-r), were used. The sample was divided into two halves, and both a confirmatory analysis and an exploratory analysis were carried out to find out the factorial structure of the scale and, with it, apply the bias filtering method. RESULTS: The results indicate that 10% of the scale is biased due to social desirability, and that there are significant differences between the group with bias clean scores and the group with scores without bias control. CONCLUSIONS: The effects of social desirability on the scale are verified, so it is concluded that in a psychosocial risk assessment is not enough to apply a self-report test and interpret its results, being necessary to minimize the sources of error.

6.
Sci Rep ; 14(1): 4810, 2024 02 27.
Artigo em Inglês | MEDLINE | ID: mdl-38413720

RESUMO

This study aimed to obtain optimized mixture with three essential oils (EOs) for maximum antioxidant activity through the augmented simplex-centroid mixture design and evaluate the effect of this optimized blend on total aerobic psychrotrophic count (TAPC), lipid and protein oxidation, instrumental color parameters and texture profile in rainbow trout fillets at refrigerated storage for nine days. Considering the DPPH and FRAP assays, the ideal EO blend was 66% lemongrass and 34% oregano. During refrigerated storage, this blend at 2000 ppm was equally effective as BHT (100 ppm) (p > 0.05), mitigating the discoloration (a* and b*), lipid, and protein oxidation in 38.83%, 12.95%, 76.13%, and 35.13%, respectively, besides shows greater effectiveness for preserving texture changes (p < 0.05) and extending the shelf life in 13 h. The lemongrass + oregano EO blend reveals a promising natural alternative to enhance the quality of rainbow trout fillets under refrigerated storage. Furthermore, the multiresponse optimization showed to be a strong ally in enabling the use of these EOs by food industries.


Assuntos
Óleos Voláteis , Oncorhynchus mykiss , Animais , Antioxidantes/farmacologia , Emulsões , Água
7.
Appetite ; 195: 107235, 2024 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-38296111

RESUMO

Dietary intake is notoriously difficult to measure in children. Laboratory test meals address some of the methodological concerns of self-report methods, but may also be susceptible to social desirability bias, referring to the tendency for individuals to adjust their behaviors in order to be perceived more positively. The aim of the current study was to evaluate whether social desirability bias was associated with children's energy intake during a laboratory test meal, and whether this association varied by food type (total caloric intake, snack food intake, fruit/vegetable intake) and sex. A total of 82 children (M age = 9.45 ± 0.85; 50 % girls; 84.1 % rural; 85.4 % White) completed several surveys, including the Children's Social Desirability Scale and had their body composition measured. At lunchtime, they were granted access to a multi-array test meal (>5000 kcal). After adjusting for lean mass, fat mass, depressive symptoms, and parental food restriction, children who reported higher social desirability bias consumed fewer calories from snack foods (B = -11.58, p = .009, semi-partial correlation = -0.28). Boys with higher social desirability bias consumed less calories from fruits and vegetables (B = -6.47, p = .010, semi-partial correlation = -0.411); this association was not significant in girls. The desire to be perceived in a positive manner may influence children's eating behaviors in experimental paradigms. Replication studies with larger, more diverse pediatric samples are needed, as are strategies to reduce the effects of social desirability bias on test meal intake in order to enhance the validity of this dietary assessment approach.


Assuntos
Dieta , Desejabilidade Social , Masculino , Feminino , Criança , Humanos , Ingestão de Energia , Ingestão de Alimentos , Comportamento Alimentar , Refeições
8.
Body Image ; 48: 101676, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38194815

RESUMO

The body image field aims to cultivate positive body image. To do so, it must appreciate factors contributing to positive body image. Sexual desirability is one such factor. Using experience sampling data from Australian Grindr users, we aimed to quantify the overlap between sexual desirability and body satisfaction. We found sexual desirability and body satisfaction correlated strongly between- (r = .90) and within-persons (rMedian =.60). Using dynamic structural equation modeling, we analyzed 238 participants' data (T = 9058), finding that sexual desirability and body satisfaction were bidirectionally related - previous sexual desirability predicted current body satisfaction (ß = 0.22) and vice versa (ß = 0.17). Participants' average body satisfaction tended to be higher when sexual desirability contributed more to body satisfaction (r = .31) and was more stable across time (r = .19). We found sexual desirability and body satisfaction overlap considerably and that sexual desirability may contribute more to body satisfaction than vice versa. Our results suggest that (1) sexual desirability and its dynamics across time influence body satisfaction, and (2) research on sexual desirability and its relationship with body image should be a focus for the field. We discuss avenues for future research on sexual desirability.


Assuntos
Imagem Corporal , Comportamento Sexual , Humanos , Imagem Corporal/psicologia , Austrália , Emoções , Satisfação Pessoal , Parceiros Sexuais
9.
Omega (Westport) ; : 302228241229590, 2024 Jan 24.
Artigo em Inglês | MEDLINE | ID: mdl-38264983

RESUMO

Research has shown that death anxiety relates to less health behavior. The present study proposes that action orientation moderates this association. That is, it is hypothesized that death anxiety and health behavior relate negatively only in individuals low in action orientation. German adults (N = 187; aged 19-86) provided self-reports on health behavior, action orientation, death anxiety, social desirability, and sociodemographics. Analyses yielded a significant moderation effect of action orientation on the link between death anxiety and health behavior over and above significant relationships of action orientation, social desirability, age, and gender, respectively, with health behavior. As hypothesized, a significantly negative association of death anxiety and health behavior was found only given low action orientation but not among high action orientation individuals. This suggests that self-regulation plays a decisive role in whether death anxiety and health behavior relate to each other.

10.
Appl Physiol Nutr Metab ; 49(2): 167-178, 2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-37929824

RESUMO

The primary objective of this study was to examine how social desirability is associated with self-reported measures of dietary intakes and variables related to attitudes and behaviours towards eating. This analysis was conducted in 1083 adults (50.0% women) from the PREDISE study. Social desirability was assessed using the Balanced Inventory of Desirable Responding (BIDR) questionnaire, which includes two subscales: (1) self-deceptive enhancement (SDE), i.e., having an overly positive self-image and (2) impression management (IM), i.e., intentional response distortion to please. BIDR total score and IM subscore were positively associated with the Canadian Healthy Eating Index (C-HEI) (ß = 0.24 and ß = 0.50; p ≤ 0.0003), calculated using data from three self-administered 24 h food recalls. All BIDR scores were positively associated with self-determined motivation for eating regulation (0.03 ≤ ß ≤ 0.06; p < 0.0001), measured by the Regulation of Eating Behavior Scale, and with the intuitive eating score (0.02 ≤ ß ≤ 0.05; p < 0.0001). Also, all BIDR scores were negatively associated with hunger and disinhibition scores measured by the Three-Factor Eating Questionnaire (-0.17 ≤ ß ≤ -0.09; p < 0.0001). All these associations were adjusted for age, sex, BMI, and the education level. Furthermore, controlling for both dimensions of social desirability did not impact the magnitude of the association between self-determined motivation (the strongest predictor of healthy eating in the PREDISE study) and C-HEI. According to our results, associations are observed with diet quality, as well as with attitudes and behaviours towards eating; therefore, a measurement of social desirability responding would be pertinent in studies using those or related variables.


Assuntos
Ingestão de Alimentos , Desejabilidade Social , Adulto , Humanos , Feminino , Masculino , Quebeque , Canadá , Inquéritos e Questionários , Comportamento Alimentar
11.
Alcohol ; 115: 41-52, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37661001

RESUMO

Craving is one of the most studied concepts in the field of addiction. It is often investigated with repeated-measure experimental designs using self-reported scales. However, the explicit nature of self-reported craving scales may make them vulnerable to social desirability and demand effects. The aim of the present study was to test whether a pre-experimental measurement of craving affects its post-experimental assessment after an alcohol video exposure and whether these changes relate to social desirability, demand effects, and alcohol consumption. Seventy-five healthy volunteers aged 18-30 years were randomly assigned to two experimental groups: a pre-post and a post-only craving assessment group. They were invited to watch an alcohol-related video. Social desirability, demand effects, engagement toward the video, and severity of alcohol consumption were assessed in all participants. The results showed a significant effect of alcohol consumption (p < .001, η2p = .09) on post-experimental craving. The main effect of the repeated measure of craving was also significant (p = .04, η2p = .001), together with the interaction between these two variables (p = .03, η2p = .06). The pre-experimental craving measurement increased its post-experimental levels, but only in heavy drinkers. However, no evidence was found that these changes were related to social desirability or demand effects. Additional exploratory analyses indicated that craving increase in high alcohol drinkers was mediated by a stronger engagement toward the alcohol-related video. In summary, the repeated measurement of craving with explicit scales has a significant impact on the results of alcohol craving studies and may not always be desirable, especially when the true purpose of the study needs to be hidden from the participants. However, the present results also suggest that the pre-post experimental design is advisable when the experimenters seek to maximize the relationship between the individual levels of alcohol consumption and alcohol cue-exposure craving changes.


Assuntos
Fissura , Desejabilidade Social , Humanos , Sinais (Psicologia) , Etanol/farmacologia , Consumo de Bebidas Alcoólicas
12.
Food Sci Technol Int ; 30(3): 232-238, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36591912

RESUMO

This study aims to investigate the effects of canning variables (cooking time, storage time, volume of vinegar, salt and sugar) on the mineral composition of canned cowpea (Vigna unguiculata (L.) Walp) and which conditions provide optimised preservation of the mineral content of the grains. Different formulations of canned cowpeas were produced following two levels factorial experimental design using five variables. A set of 11 different formulations were evaluated using the desirability function with essential minerals (Ca, Cu, Fe, Mn, Mg, P and Zn) as the response. The optimal multi-response conditions for higher mineral retention were: 360 days of storage at 30 ± 5 °C (ST2), 30 ml of vinegar, 9.0 g of NaCl, 18 min of cooking time, and 9.0 g, 19.5 g or 30 g of sugar (the effect of the sugar content at the evaluated range was not significant at 95% confidence level).


Assuntos
Vigna , Ácido Acético , Carboidratos , Minerais/análise , Açúcares
13.
AIDS Behav ; 28(1): 320-331, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37751111

RESUMO

Reporting of condom-use can limit researchers' understanding of high-risk sexual behaviours. We compared self-reported condom-use with the Yc-DNA biomarker data and investigated potential factors influencing participation in, and reporting of, sexual behaviours. Self-reported data were collected using Audio Computer Assisted Self Interviews (ACASI) and samples for Yc-DNA biomarker were collected using self-administered and health worker-collected vaginal swabs from 644 women (aged 15-24 years) who were not living with HIV. Yc-DNA results and interview data were compared using McNemar-Bowker Analysis and Cohen's Kappa. Test statistics for Yc-DNA biomarker were calculated. Log Binomial models for Yc-DNA and self-reported results were conducted to assess for association. We found strong evidence (p < 0.001) for a difference between Yc-DNA and self-reported results. 13.7% of participants reported consistent condom-use with all partners, regardless of HIV status. Self-reported condom-use was discordant in 50.0% (n = 206) of cases, when compared to Yc-DNA results. Positive Yc-DNA results were found to be associated with older age (RR 1.36; 95%CI 1.04, 1.76 p = 0.023). Self-reported condom-use with partners with unknown HIV status was associated with higher education (RR 0.76; 95%CI 0.58,0.99 p = 0.043). Sensitivity analysis did not determine difference between methods for controlling for missing data. We found significant under-reporting of condomless sex in the self-reported data when compared to Yc-DNA results.


Assuntos
Infecções por HIV , Sexo sem Proteção , Humanos , Feminino , Autorrelato , Infecções por HIV/diagnóstico , Infecções por HIV/epidemiologia , Infecções por HIV/prevenção & controle , Uganda/epidemiologia , Comportamento Sexual , DNA/análise , Biomarcadores , Parceiros Sexuais , Preservativos
14.
Clin Infect Dis ; 78(2): 259-268, 2024 Feb 17.
Artigo em Inglês | MEDLINE | ID: mdl-37740559

RESUMO

BACKGROUND: Hospital-acquired and ventilator-associated bacterial pneumonia (HABP/VABP) are frequently caused by multidrug-resistant organisms. Patient-centered endpoints in clinical trials are needed to develop new antibiotics for HABP/VABP. Desirability of outcome ranking (DOOR) is a paradigm for the design, analysis, and interpretation of clinical trials based on a patient-centered, benefit-risk evaluation. METHODS: A multidisciplinary committee created an infectious diseases DOOR endpoint customized for HABP/VABP, incorporating infectious complications, serious adverse events, and mortality. We applied this to 2 previously completed, large randomized controlled trials for HABP/VABP. ZEPHyR compared vancomycin to linezolid and VITAL compared linezolid to tedizolid. For each trial, we evaluated the DOOR distribution and probability, including DOOR component and partial credit analyses. We also applied DOOR in subgroup analyses. RESULTS: In both trials, the HABP/VABP DOOR demonstrated similar overall clinical outcomes between treatment groups. In ZEPHyR, the probability that a participant treated with linezolid would have a more desirable outcome than a participant treated with vancomycin was 50.2% (95% confidence interval [CI], 45.1%--55.3%). In VITAL, the probability that a participant treated with tedizolid would have a more desirable outcome than a participant treated with linezolid was 48.7% (95% CI, 44.8%-52.6%). The DOOR component analysis revealed that participants treated with tedizolid had a less desirable outcome than those treated with linezolid when considering clinical response alone. However, participants with decreased renal function had improved overall outcomes with tedizolid. CONCLUSIONS: The HABP/VABP DOOR provided more granular information about clinical outcomes than is typically presented in clinical trials. HABP/VABP trials would benefit from prospectively using DOOR.


Assuntos
Pneumonia Associada a Assistência à Saúde , Pneumonia Bacteriana , Pneumonia Associada à Ventilação Mecânica , Humanos , Linezolida/uso terapêutico , Vancomicina/uso terapêutico , Pneumonia Bacteriana/tratamento farmacológico , Pneumonia Bacteriana/microbiologia , Antibacterianos/uso terapêutico , Bactérias , Pneumonia Associada a Assistência à Saúde/tratamento farmacológico , Pneumonia Associada à Ventilação Mecânica/tratamento farmacológico , Pneumonia Associada à Ventilação Mecânica/microbiologia , Hospitais , Ventiladores Mecânicos
15.
Arch Sex Behav ; 53(3): 879-887, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38102509

RESUMO

Due to social desirability bias, people tend to self-present themselves in the presence of others in a favorable light, which sometimes may lead to deviations from reality. This phenomenon is particularly pronounced when controversial or strictly norm-bounded matters are considered. Here, we tested how a presence of an attractive model-either male or female-influences people's declarations on their sociosexual orientation-the degree of their sexual permissiveness in terms of their past behavior, attitudes toward uncommitted sex, and desire for sexual intercourse with individuals they are not in a relationship with. The participants (N = 244, 52% men) answered questions about their sociosexuality in solitude, or out loud with an attractive model present. The results show that both men and women declare lowered levels of their desire, but not behavior or attitude, in the presence of both male and female attractive models. A follow-up study (N = 188, 51% men) showed that this effect was not due to the differing conditions of responding (out loud vs written down). The research points out to an area of human sexuality that is prone to being falsified in research and which serves as an important factor in self-presentation.


Assuntos
Coito , Comportamento Sexual , Humanos , Feminino , Masculino , Seguimentos , Sexualidade , Atitude
16.
Soc Sci Res ; 117: 102947, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-38049211

RESUMO

Past work consistently points to improved attitudes towards gay athletes and growing support for homosexuality, yet reports of a homophobic climate in amateur and professional football persist. Here, we explore two potential explanations for the prevalence of homophobia in football despite low levels of anti-gay attitudes: social desirability and pluralistic ignorance. We conduct an online survey among a football-affine and socio-demographically diverse sample in the UK. We find that anti-gay attitudes are rare. Importantly, estimates from a list experiment do not differ from the prevalence measured by direct questions, providing no evidence of social desirability. By contrast, second-order beliefs about anti-gay attitudes substantially and consistently exceed attitudes, pointing towards pluralistic ignorance as the most likely explanation. We conclude by emphasizing the need for transparent communication to reduce pluralistic ignorance and correct misperceptions among players, officials and supporters.


Assuntos
Futebol Americano , Humanos , Desejabilidade Social , Homossexualidade , Atitude , Atletas
17.
Scand J Psychol ; 2023 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-38041434

RESUMO

INTRODUCTION: The belief-bias effect is a tendency to evaluate syllogistic statements based on believability rather than on formal logic validity. Following this rationale, the study examines desirability bias as the tendency to evaluate syllogistic conclusions based on their desirability when reasoning is conducted on personality-relevant categorical syllogisms. METHODS: For this purpose, 60 syllogisms were constructed based on the items of the Big Five questionnaire. Syllogisms were subsequently categorized as desirable (e.g., "I empathize with others") and undesirable (e.g., "I am passive") based on their conclusion. In each task, the second premise and the conclusion were formulated in the first person to increase a respondent's identification with the content. A total of 300 university students (Mage = 20.08, SD = 2.02) participated in the study. RESULTS: A 2 (syllogism validity: valid, invalid) × 2 (syllogism desirability: desirable, undesirable) repeated measures ANOVA was employed. The analysis showed a greater tendency to accept desirable conclusions on valid syllogisms (valid desirable rather than valid undesirable) and reject undesirable conclusions on invalid syllogisms (invalid undesirable rather than invalid desirable). CONCLUSION: These findings have implications for socially desirable responding in cognitive tasks, which may be further developed as a source of self-relevant content as well as for further extension of belief bias in the form of desirability bias.

18.
Molecules ; 28(23)2023 Nov 24.
Artigo em Inglês | MEDLINE | ID: mdl-38067479

RESUMO

Plant-based materials are an important source of bioactive compounds (BC) with interesting industrial applications. Therefore, adequate experimental strategies for maximizing their recovery yield are required. Among all procedures for extracting BC (maceration, Soxhlet, hydro-distillation, pulsed-electric field, enzyme, microwave, high hydrostatic pressure, and supercritical fluids), the ultrasound-assisted extraction (UAE) highlighted as an advanced, cost-efficient, eco-friendly, and sustainable alternative for recovering BC (polyphenols, flavonoids, anthocyanins, and carotenoids) from plant sources with higher yields. However, the UAE efficiency is influenced by several factors, including operational variables and extraction process (frequency, amplitude, ultrasonic power, pulse cycle, type of solvent, extraction time, solvent-to-solid ratio, pH, particle size, and temperature) that exert an impact on the molecular structures of targeted molecules, leading to variations in their biological properties. In this context, a diverse design of experiments (DOEs), including full or fractional factorial, Plackett-Burman, Box-Behnken, Central composite, Taguchi, Mixture, D-optimal, and Doehlert have been investigated alone and in combination to optimize the UAE of BC from plant-based materials, using the response surface methodology and mathematical models in a simple or multi-factorial/multi-response approach. The present review summarizes the advantages and limitations of the most common DOEs investigated to optimize the UAE of bioactive compounds from plant-based materials.


Assuntos
Antocianinas , Polifenóis , Flavonoides , Extratos Vegetais/química , Solventes/química
19.
Small Methods ; : e2300958, 2023 Dec 17.
Artigo em Inglês | MEDLINE | ID: mdl-38105388

RESUMO

Nomex Honeycomb core is the foundational building block for manufacturing aerospace composite components. Its usage requires machining honeycomb in complex aerodynamic profiles where the quality of the core is governed by accuracy and precision of cut profiles. The assessment of accuracy and precision is directly related to forces induced in the cutting tool and cutting efficiency. These two parameters form the basis of a multi-objective function that this paper aims to optimize for the milling operation. The parameter of depth of cut considered in this paper has not been analyzed in a multi-objective optimization study of the Nomex Honeycomb core previously. A Taguchi-based array of Design of Experiments followed by Analysis of Variance and correlation analysis is utilised. The results indicate that the most significant factor is the feed rate, with a percentage contribution of 72% for the cutting forces and depth of cut, with a percentage contribution of 85% in the case of cutting efficiency. The two parameters are optimized using Desirability Function Analysis and Grey Relational Analysis. The results are validated through experimental runs with an error within 5% of the statistical predictions, with the percentage improvement in cutting forces for optimum runs as compared to the worst experimental run at 47.8%. The percentage improvement in cutting efficiency likewise is 11%.

20.
J Pain Res ; 16: 3227-3238, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37790191

RESUMO

Introduction: Chemotherapy-induced peripheral neurotoxicity (CIPN) affects nearly 70% of cancer patients after chemotherapy, causing sensory, motor, autonomic dysfunction, and neuropathic pain. The Desirability of Outcome Ranking (DOOR) framework is proposed as a better way to assess preventive or therapeutic interventions for CIPN. Methods: A survey was conducted among Italian healthcare professionals and researchers affiliated to the Italian Chapter of the International Association for the Study of Pain (AISD) to identify the most important outcomes in clinical management and research. Results: Among the 73 respondents, 61 qualified for the survey, with an overall response rate of 1.2%. The vast majority were physicians (77%), most of whom were anesthesiologists (47.5%). The results showed that pain, survival, sensory impairment, motor impairment, and quality of life were consistently ranked as the most important outcomes, but there was significant disagreement in the outcomes relative ranking, making it difficult to develop a DOOR algorithm. The study also revealed that clinicians commonly use structured interviews to evaluate patients with CIPN, and the most prescribed drugs or supplements were palmitoylethanolamide, pregabalin, gabapentin and alpha lipoic acid as preventive agents and pregabalin, palmitoylethanolamide, duloxetine, gabapentin, and amitriptyline as therapeutic agents. However, many of these drugs have not been clinically proven to be effective for CIPN. Discussion: This study suggests that the implementation of a DOOR framework for CIPN using healthcare professionals is more difficult than expected, given the significant disagreement in our respondents' ranking of outcomes. Our work provides interesting topics for future research in CIPN, but its limitations include a small sample size, a low response rate, and a possible selection bias.

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