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1.
Accid Anal Prev ; 202: 107554, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38701558

RESUMEN

BACKGROUND: Hazard perception (HP) has been argued to improve with experience, with numerous training programs having been developed in an attempt to fast track the development of this critical safety skill. To date, there has been little synthesis of these methods. OBJECTIVE: The present study sought to synthesise the literature for all road users to capture the breadth of methodologies and intervention types, and quantify their efficacy. DATA SOURCES: A systematic review of both peer reviewed and non-peer-reviewed literature was completed. A total of 57 papers were found to have met inclusion criteria. RESULTS: Research into hazard perception has focused primarily on drivers (with 42 studies), with a limited number of studies focusing on vulnerable road users, including motorcyclists (3 studies), cyclists (7 studies) and pedestrians (5 studies). Training was found to have a large significant effect on improving hazard perception skills for drivers (g = 0.78) and cyclists (g = 0.97), a moderate effect for pedestrians (g = 0.64) and small effect for motorcyclists (g = 0.42). There was considerable heterogeneity in the findings, with the efficacy of training varying as a function of the hazard perception skill being measured, the type of training enacted (active, passive or combined) and the number of sessions of training (single or multiple). Active training and single sessions were found to yield more consistent significant improvements in hazard perception. CONCLUSIONS: This study found that HP training improved HP skill across all road user groups with generally moderate to large effects identified. HP training should employ a training method that actively engages the participants in the training task. Preliminary results suggest that a single session of training may be sufficient to improve HP skill however more research is needed into the delivery of these single sessions and long-term retention. Further research is also required to determine whether improvements in early-stage skills translate to improvements in responses on the road, and the long-term retention of the skills developed through training.


Asunto(s)
Accidentes de Tránsito , Conducción de Automóvil , Humanos , Accidentes de Tránsito/prevención & control , Conducción de Automóvil/educación , Conducción de Automóvil/psicología , Motocicletas , Ciclismo , Percepción , Seguridad , Peatones
2.
Appl Psychol Health Well Being ; 16(1): 119-137, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37501499

RESUMEN

Poor sleep and subsequent decline in mental health often occur during times of prolonged stress, such as a pandemic. Self-compassion is linked with improved sleep and better mental health, while self-criticism is linked with poorer sleep and psychological distress. Given there is little evidence of the interrelationships of these constructs, we examined whether higher self-compassion or lower levels of self-criticism can reduce psychological distress directly and indirectly via sleep during times of prolonged stress. Structural equation modelling was used to analyse two samples (N = 722, Study 1, and N = 622, Replication Study) of university students during different stages of the pandemic. An aggregate psychological distress construct was calculated using depression, anxiety and stress measures. We created models that showed insomnia symptoms mediated the relationship between self-compassion/self-criticism and psychological distress. Sleep partially mediated both relationships, and this was the strongest effect in both samples. This suggests that improving self-compassion and reducing self-criticism will improve sleep, leading to reduced psychological distress. As our findings are robust and held at two time points, future research should investigate broader demographics and differing stress responses.


Asunto(s)
Distrés Psicológico , Trastornos del Sueño-Vigilia , Humanos , Autoevaluación (Psicología) , Depresión/psicología , Autocompasión , Empatía , Sueño , Estrés Psicológico/psicología
3.
Nat Ecol Evol ; 7(12): 1993-2003, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37932384

RESUMEN

Understanding how temperature determines the distribution of life is necessary to assess species' sensitivities to contemporary climate change. Here, we test the importance of temperature in limiting the geographic ranges of ectotherms by comparing the temperatures and areas that species occupy to the temperatures and areas species could potentially occupy on the basis of their physiological thermal tolerances. We find that marine species across all latitudes and terrestrial species from the tropics occupy temperatures that closely match their thermal tolerances. However, terrestrial species from temperate and polar latitudes are absent from warm, thermally tolerable areas that they could potentially occupy beyond their equatorward range limits, indicating that extreme temperature is often not the factor limiting their distributions at lower latitudes. This matches predictions from the hypothesis that adaptation to cold environments that facilitates survival in temperate and polar regions is associated with a performance trade-off that reduces species' abilities to contend in the tropics, possibly due to biotic exclusion. Our findings predict more direct responses to climate warming of marine ranges and cool range edges of terrestrial species.


Asunto(s)
Cambio Climático , Frío , Temperatura
4.
Trauma Violence Abuse ; : 15248380231196115, 2023 Sep 13.
Artículo en Inglés | MEDLINE | ID: mdl-37702183

RESUMEN

This review aimed to examine the relationship between intimate partner violence (IPV) perpetration and trait narcissism, and whether the strength of this relationship differs depending on narcissism type (grandiose or vulnerable), the type of violence perpetrated, or the perpetrator's gender. Scopus, Medline, PsycInfo, and Academic Search Complete databases were searched on August 11, 2022. Studies were included if they were in English, measured IPV perpetration and trait narcissism, and examined the relationship between trait narcissism and IPV perpetration. Studies were excluded if they were review papers, conference extracts, book chapters, or if the data was not specific to trait narcissism. The AXIS tool was used to assess the quality and risk of bias of the studies. Twenty-two studies (N = 11,520 participants) were included in the random effects meta-analysis revealing a significant, weak, positive relationship between trait narcissism and IPV perpetration, r = .15. Subgroup analyses revealed physical IPV perpetration was not significantly related to trait narcissism while cyber and psychological IPV perpetration were significantly, positively, weakly related to trait narcissism. No significant difference in the strength of the relationship with IPV perpetration was found between males and females. The relationship between trait narcissism and IPV perpetration was significantly greater for vulnerable narcissism than grandiose narcissism. Overall, the quality of the included studies was high, and risk of bias was low. All measures were self-report and underreporting could be present given both narcissistic traits and IPV perpetration are considered socially undesirable. Future research examining these relationships should specify IPV and narcissism types.

5.
Neuropsychol Rev ; 2023 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-37695451

RESUMEN

Over the last few decades, excessive and disordered screen use has become more prevalent, prompting investigations into its associated consequences. The extent to which disordered screen use behaviours impact neuropsychological functioning has been reportedly mixed and at times inconsistent. This review sought to synthesise the literature and estimate the magnitude of overall cognitive impairment across a wide range of disordered screen use behaviours. We also sought to determine the cognitive domains most impacted, and whether the observed impairments were moderated by the classification of screen-related behaviours (i.e., Internet or gaming) or the format of cognitive test administration (i.e., paper-and-pencil or computerised). A systematic search of databases (Embase, PsycINFO, MEDLINE) identified 43 cross-sectional articles that assessed neuropsychological performance in disordered screen use populations, 34 of which were included in the meta-analysis. A random-effects meta-analysis revealed significant small/medium (g = .38) cognitive deficits for individuals with disordered screen use behaviours relative to controls. The most affected cognitive domain with a significant medium effect size (g = .50) was attention and focus followed by a significant reduction in executive functioning (g = .31). The classification of disordered screen use behaviours into Internet or gaming categories or the format of cognitive testing did not moderate these deficits. Additionally, excluding disordered social media use in an exploratory analysis had little effect on the observed outcomes. This study highlights a number of methodological considerations that may have contributed to disparate findings and shows that disordered screen use can significantly impact cognitive performance. Recommendations for future research are also discussed. Data for this study can be found at https://osf.io/upeha/ .

6.
Eur J Pharm Biopharm ; 187: 87-95, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-37061100

RESUMEN

Both stability and compatibility of parenteral nutrition solutions (PNS) with drug products are major concerns for clinicians and clinical pharmacists, especially when concurrent administration of PNS with intravenous medications (IVM) is unavoidable. Since the same physicochemical principles apply to both adult's and paediatrics' PNS, concerns about stability and compatibility may still apply to both. However, these concerns are relatively more common in paediatrics and neonatal clinical settings, where limited vascular access can be problematic and the coadministration of PNS and drugs is more common. In neonatal and paediatric populations, there have been few experimental studies and comprehensive evaluations looking at medication compatibility with frequently used PNS. This work is part of a larger research project concerned for compatibility of PNS with commonly used intravenous medication in paediatric and neonates. This paper captures and reviews published data on factors influencing stability and compatibility of parenteral nutrition solutions. This information will help clinicians and clinical pharmacists to understand the principals of the stability and compatibility of PNS, furthermore, it will inform better design of future compatibility studies, as it highlights the complexity of PNS and the multiple factors influencing the stability of PNS, and hence its compatibility with IVM. When preparing, prescribing, and administering the PNS, especially when co-administration with IVM is unavoidable, it is important to take into account the physicochemical properties of the PNS components and IVM as well as administration conditions and environmental factors. These factors should also be considered in the design of the compatibility studies of the PNS with the IVM.


Asunto(s)
Soluciones para Nutrición Parenteral , Recién Nacido , Humanos , Niño , Soluciones para Nutrición Parenteral/química , Preparaciones Farmacéuticas , Estabilidad de Medicamentos
7.
Psychopathology ; 56(5): 342-358, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36731439

RESUMEN

INTRODUCTION: Research has consistently demonstrated that the COVID-19 pandemic, and resulting sudden shift to online learning (OL), had detrimental impacts on the motivation and mental health of university students. To date however this research has been cross-sectional and quantitative. METHOD: This study employed a mixed-methods design to examine the experiences of students at a large national Australian University both at the outset of the pandemic in 2020 (n = 824) and again 6 months later (n = 254) at the conclusion of their academic year. RESULTS: Key findings from this study highlighted that despite quantitative findings suggesting poorer attitudes toward learning during the pandemic, qualitatively students perceived both positives and negatives to studying online. The qualitative results further highlighted that this experience was not the same for all and suggests the need to reconsider the standard approaches to offering support for students. CONCLUSION: Students reported poor mental health in both time points, but outlined avenues which improved not only their mental health but also their motivation for studying such as increased peer engagement and self-care activities. Students reported that OL negatively impacted on both their engagement with studies and their mental health, highlighting the need for universities to prioritize supporting their students' mental health as much as their development of academic skills.


Asunto(s)
COVID-19 , Educación a Distancia , Humanos , Salud Mental , Estudios Transversales , Pandemias , Autoeficacia , Universidades , Australia , Estudiantes
8.
Nat Ecol Evol ; 7(1): 102-112, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-36593294

RESUMEN

Animal-mediated pollination is a vital ecosystem service to crops and wild plants, and long-term stability of plant-pollinator interactions is therefore crucial for maintaining plant biodiversity and food security. However, it is unknown how the composition of pollinators and the structure of pollinator interactions have changed across longer time spans relevant to examining responses to human activities such as climate change. We resampled an historical dataset of plant-pollinator interactions across several orders of pollinating insects in a subarctic location in Finland that has already experienced substantial climate warming but little land use change. Our results reveal a dramatic turnover in pollinator species and rewiring of plant-pollinator interactions, with only 7% of the interactions shared across time points. The relative abundance of moth and hoverfly pollinators declined between time points, whereas muscoid flies, a group for which little is known regarding conservation status and responses to climate, became more common. Specialist pollinators disproportionately declined, leading to a decrease in network-level specialization, which could have harmful consequences for pollination services. Our results exemplify the changes in plant-pollinator networks that might be expected in other regions as climate change progresses.


Asunto(s)
Ecosistema , Insectos , Animales , Humanos , Insectos/fisiología , Polinización/fisiología , Biodiversidad , Productos Agrícolas
9.
Br J Surg ; 110(1): 92-97, 2022 12 13.
Artículo en Inglés | MEDLINE | ID: mdl-36336577

RESUMEN

BACKGROUND: At the onset of the COVID-19 pandemic, elective surgical provision was severely affected by the need for hospital reorganization to care for critically ill patients. In response, National Health Service (NHS) England issued national guidance proposing acceptable time intervals for postponing different types of surgical procedure. This study reports healthcare professionals' private accounts of the strategies adopted to manage the imbalance of demand and resource, using colorectal cancer surgery as a case study. METHODS: Twenty-seven semistructured interviews were conducted with healthcare professionals between June and November 2020. A key informant sampling approach was used, followed by snowballing to achieve maximum regional variation across the UK. Data were analysed thematically using the constant comparison approach. RESULTS: In the context of considerable resource constraint, surgical teams overcame challenges to continue elective cancer provision. They achieved this by pursuing a combination of strategies: relocating surgical services; prioritizing patients within and across surgical specialties; adapting patient treatment plans; and introducing changes to surgical team working practices. Despite national guidance, prioritization decisions were framed as complex, and the most challenging of the strategies to implement, both practically and emotionally. CONCLUSION: There is a need to better support surgeons tasked with prioritizing patients when capacity exceeds demand.


Asunto(s)
COVID-19 , Neoplasias Colorrectales , Humanos , COVID-19/epidemiología , Pandemias , Medicina Estatal , Procedimientos Quirúrgicos Electivos , Neoplasias Colorrectales/cirugía
10.
BMJ Open ; 12(10): e061300, 2022 10 05.
Artículo en Inglés | MEDLINE | ID: mdl-36198447

RESUMEN

OBJECTIVES: To describe the development and application of methods to optimise the design of case report forms (CRFs) for clinical studies evaluating surgical procedures, illustrated with an example of abdominal stoma formation. DESIGN: (1) Literature reviews, to identify reported variations in surgical components of stoma formation, were supplemented by (2) intraoperative qualitative research (observations, videos and interviews), to identify unreported variations used in practice to generate (3) a 'long list' of items, which were rationalised using (4) consensus methods, providing a pragmatic list of CRF items to be captured in the Cohort study to Investigate the Prevention of parastomal HERnias (CIPHER) study. SETTING: Two secondary care surgical centres in England. PARTICIPANTS: Patients undergoing stoma formation, surgeons undertaking stoma formation and stoma nurses. OUTCOME MEASURES: Successful identification of key CRF items to be captured in the CIPHER study. RESULTS: 59 data items relating to stoma formation were identified and categorised within six themes: (1) surgical approach to stoma formation; (2) trephine formation; (3) reinforcing the stoma trephine with mesh; (4) use of the stoma as a specimen extraction site; (5) closure of other wounds during the procedure; and (6) spouting the stoma. CONCLUSIONS: This study used multimodal data collection to understand and capture the technical variations in stoma formation and design bespoke CRFs for a multicentre cohort study. The CIPHER study will use the CRFs to examine associations between the technical variations in stoma formation and risks of developing a parastomal hernia. TRIAL REGISTRATION NUMBER: ISRCTN17573805.


Asunto(s)
Hernia Incisional , Estomas Quirúrgicos , Estudios de Cohortes , Colostomía , Humanos , Hernia Incisional/etiología , Hernia Incisional/prevención & control , Mallas Quirúrgicas , Estomas Quirúrgicos/efectos adversos
11.
J Pharm Sci ; 111(5): 1219-1223, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-34499899

RESUMEN

Palatability is amongst the most important determinants of whether or not a child will take a medicine. In order to increase concordance with treatment regimens it is often necessary to utilise a range of formulation techniques to improve the palatability of medicines. These can include selecting a different molecule or version of a molecule (such as a different polymorph or salt form), various taste masking techniques and/or the inclusion of flavours and sweeteners. In order to be able to understand the taste of the Active Pharmaceutical Ingredient (API) and to validate the formulation approach used, it is necessary to be able to use the most reliable taste evaluation method possible. Multiple in vivo and in vitro methods exist nowadays or are proposed in the literature but are often little understood by the pharmaceutical product development community. In particular, different methods may be more relevant at different stages of product development. The aim of this article is to propose a tool to guide the selection of the most appropriate method for the desired evaluation. A spreadsheet-based tool is proposed that is designed to allow the systematic assessment of the applicability of any taste assessment technique existing or new to the users proposed application. A series of criteria are defined that will allow the user to assess the analytical, usability and availability factors for the technique that is being considered. Such a systematic review will help the user to understand the benefits and risks of using each methodology for that application. The use of the tool is illustrated based on currently available data and literature. As new/existing methods are developed/improved, the outcomes of the tool may change.


Asunto(s)
Edulcorantes , Gusto , Niño , Desarrollo de Medicamentos , Aromatizantes , Humanos
12.
Neuropsychol Rev ; 32(3): 520-536, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-34131885

RESUMEN

Traumatic brain injury (TBI) can lead to impairments in emotion recognition that can present considerable challenges to social communication and the maintenance of interpersonal relationships. This review aimed to estimate the magnitude of emotion recognition impairments in TBI patients overall, and at the emotion category level, and to determine if the magnitude of observed impairments were moderated by modality (e.g., face, voice, multi-modal) of emotional expression, and severity of injury. Searches of PubMed, Scopus, PsycINFO, and Medline databases identified 17 studies which satisfied strict inclusion and exclusion criteria for the systematic review (comparing TBI patients to matched controls). Of these studies, 15 were included in the meta-analysis (NTBI = 474; NControl = 461). Moderate/large average deficits emerged for TBI patients relative to controls (Hedges' g = 0.79, 95% CI: 0.61 - 0.96, p < .001; Q = 22.53, p = .068, τ2 = 0.04, I2 = 37.84; indicating low heterogeneity). TBI patients were impaired across all emotion categories, with moderate/large effect sizes observed for fear and anger, moderate effect sizes for disgust, neutral and sadness, while effect sizes for happiness and surprise were small. The magnitude of impairment for individuals with TBI severity classified as moderate/severe TBI was moderate, whereas severe TBI was large. Moderate/large effect sizes were observed across the different modalities of presentation. This meta-analysis provides evidence for marked global impairments in emotion recognition, with the magnitude of impairment greatest for negative emotions (i.e., anger and fear). This meta-analysis provided no evidence to suggest that the magnitude of impairment is influenced by injury severity or modality of stimulus presentation. Recommendations for future research are discussed.


Asunto(s)
Lesiones Traumáticas del Encéfalo , Expresión Facial , Lesiones Traumáticas del Encéfalo/complicaciones , Lesiones Traumáticas del Encéfalo/psicología , Emociones , Miedo , Humanos , Reconocimiento en Psicología
13.
Sci Adv ; 7(42): eabd3524, 2021 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-34644118

RESUMEN

Despite evidence of pollinator declines from many regions across the globe, the threat this poses to plant populations is not clear because plants can often produce seeds without animal pollinators. Here, we quantify pollinator contribution to seed production by comparing fertility in the presence versus the absence of pollinators for a global dataset of 1174 plant species. We estimate that, without pollinators, a third of flowering plant species would produce no seeds and half would suffer an 80% or more reduction in fertility. Pollinator contribution to plant reproduction is higher in plants with tree growth form, multiple reproductive episodes, more specialized pollination systems, and tropical distributions, making these groups especially vulnerable to reduced service from pollinators. These results suggest that, without mitigating efforts, pollinator declines have the potential to reduce reproduction for most plant species, increasing the risk of population declines.

14.
Accid Anal Prev ; 159: 106226, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34198051

RESUMEN

The ubiquity of mobile phones has led to a rapid increase in its presence and use in vehicles, especially among young adults (up to 25 years), who are generally the least experienced group of drivers. The potential for phones to draw attention away from the main driving task has significant consequences for road safety. Previous studies have found that the mere presence of a mobile phone can be distracting by impairing attention in experimental non-driving contexts. However, the effect of phone presence, independent to usage, has not yet been examined in the context of driving. As such, the present study examined whether the mere presence of a mobile phone, its proximity to the driver, and power status (on/off) influenced the driving performance of young drivers. Additionally, this study assessed whether the effects of phone presence and proximity were moderated by an individual's level of dependence on, or emotional attachment to, their phone. A sample of 127 undergraduate psychology students (M = 19.76, SD = 1.63) were randomly assigned to one of four conditions: (1) phone absent (control), (2) phone on, in holder, (3) phone off, in holder, and (4) phone on, in pocket. They all completed the same simulated drive, and were measured for degree of phone dependence and phone emotional attachment. Overall, drivers in all the phone present conditions made significantly more driving errors (speeding and collision) compared to those in the phone absent (control) condition, irrespective of proximity to the phone and whether it was on or off. Phone dependence, but not phone emotional attachment, moderated the effect of phone presence on speeding behaviour. These findings suggest that the mere presence of a phone is distracting for drivers, especially so for those who are highly dependent on their phone, which may place them at a greater risk of a distraction induced crash.


Asunto(s)
Conducción de Automóvil , Teléfono Celular , Conducción Distraída , Accidentes de Tránsito , Humanos , Adulto Joven
15.
Sci Data ; 8(1): 136, 2021 05 21.
Artículo en Inglés | MEDLINE | ID: mdl-34021166

RESUMEN

Earthworms are an important soil taxon as ecosystem engineers, providing a variety of crucial ecosystem functions and services. Little is known about their diversity and distribution at large spatial scales, despite the availability of considerable amounts of local-scale data. Earthworm diversity data, obtained from the primary literature or provided directly by authors, were collated with information on site locations, including coordinates, habitat cover, and soil properties. Datasets were required, at a minimum, to include abundance or biomass of earthworms at a site. Where possible, site-level species lists were included, as well as the abundance and biomass of individual species and ecological groups. This global dataset contains 10,840 sites, with 184 species, from 60 countries and all continents except Antarctica. The data were obtained from 182 published articles, published between 1973 and 2017, and 17 unpublished datasets. Amalgamating data into a single global database will assist researchers in investigating and answering a wide variety of pressing questions, for example, jointly assessing aboveground and belowground biodiversity distributions and drivers of biodiversity change.


Asunto(s)
Biodiversidad , Oligoquetos/clasificación , Animales , Biomasa
16.
J Anim Ecol ; 90(6): 1398-1407, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33825186

RESUMEN

Approximately 25% of mammals are currently threatened with extinction, a risk that is amplified under climate change. Species persistence under climate change is determined by the combined effects of climatic factors on multiple demographic rates (survival, development and reproduction), and hence, population dynamics. Thus, to quantify which species and regions on Earth are most vulnerable to climate-driven extinction, a global understanding of how different demographic rates respond to climate is urgently needed. Here, we perform a systematic review of literature on demographic responses to climate, focusing on terrestrial mammals, for which extensive demographic data are available. To assess the full spectrum of responses, we synthesize information from studies that quantitatively link climate to multiple demographic rates. We find only 106 such studies, corresponding to 87 mammal species. These 87 species constitute <1% of all terrestrial mammals. Our synthesis reveals a strong mismatch between the locations of demographic studies and the regions and taxa currently recognized as most vulnerable to climate change. Surprisingly, for most mammals and regions sensitive to climate change, holistic demographic responses to climate remain unknown. At the same time, we reveal that filling this knowledge gap is critical as the effects of climate change will operate via complex demographic mechanisms: a vast majority of mammal populations display projected increases in some demographic rates but declines in others, often depending on the specific environmental context, complicating simple projections of population fates. Assessments of population viability under climate change are in critical need to gather data that account for multiple demographic responses, and coordinated actions to assess demography holistically should be prioritized for mammals and other taxa.


Asunto(s)
Cambio Climático , Mamíferos , Animales , Dinámica Poblacional
17.
Nat Commun ; 12(1): 1824, 2021 03 23.
Artículo en Inglés | MEDLINE | ID: mdl-33758189

RESUMEN

There is an urgent need to synthesize the state of our knowledge on plant responses to climate. The availability of open-access data provide opportunities to examine quantitative generalizations regarding which biomes and species are most responsive to climate drivers. Here, we synthesize time series of structured population models from 162 populations of 62 plants, mostly herbaceous species from temperate biomes, to link plant population growth rates (λ) to precipitation and temperature drivers. We expect: (1) more pronounced demographic responses to precipitation than temperature, especially in arid biomes; and (2) a higher climate sensitivity in short-lived rather than long-lived species. We find that precipitation anomalies have a nearly three-fold larger effect on λ than temperature. Species with shorter generation time have much stronger absolute responses to climate anomalies. We conclude that key species-level traits can predict plant population responses to climate, and discuss the relevance of this generalization for conservation planning.


Asunto(s)
Cambio Climático , Desarrollo de la Planta/fisiología , Plantas/efectos adversos , Dinámica Poblacional/estadística & datos numéricos , Variación Biológica Poblacional/fisiología , Clima , Bases de Datos Factuales , Ecosistema , Modelos Estadísticos , Lluvia , Análisis de Regresión , Temperatura
18.
Nat Commun ; 12(1): 1198, 2021 02 19.
Artículo en Inglés | MEDLINE | ID: mdl-33608528

RESUMEN

Understanding how species' thermal limits have evolved across the tree of life is central to predicting species' responses to climate change. Here, using experimentally-derived estimates of thermal tolerance limits for over 2000 terrestrial and aquatic species, we show that most of the variation in thermal tolerance can be attributed to a combination of adaptation to current climatic extremes, and the existence of evolutionary 'attractors' that reflect either boundaries or optima in thermal tolerance limits. Our results also reveal deep-time climate legacies in ectotherms, whereby orders that originated in cold paleoclimates have presently lower cold tolerance limits than those with warm thermal ancestry. Conversely, heat tolerance appears unrelated to climate ancestry. Cold tolerance has evolved more quickly than heat tolerance in endotherms and ectotherms. If the past tempo of evolution for upper thermal limits continues, adaptive responses in thermal limits will have limited potential to rescue the large majority of species given the unprecedented rate of contemporary climate change.


Asunto(s)
Evolución Biológica , Fenómenos Fisiológicos de las Plantas , Termotolerancia/fisiología , Adaptación Fisiológica , Animales , Clima , Cambio Climático , Planeta Tierra , Ecología , Calor , Temperatura
19.
Eur J Pharm Biopharm ; 160: 125-133, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33524535

RESUMEN

Drug release within the oral cavity can be of paramount importance for formulations that are designed for specific purposes such as taste-masking, faster onset of therapeutic action, localization of treatment or avoidance of first-pass metabolism. Preclinical methods for assessment of dissolution in the oral cavity are necessary for design and development of these formulation but currently there is no consensus on what variables should be defined to achieve biorelevance in these tests. In this study, biorelevant simulated salivary fluids (SSFs) that can be uniformly applied for oral cavity dissolution testing were developed. Unstimulated saliva (US) SSF and stimulated saliva (SS) SSF were separately developed since the two states significantly differ. Physicochemical properties including pH, buffer capacity, surface tension and viscosity were assessed during development and optimised to mimic human saliva (HS). In order to account for the salivary proteins in HS, use of bovine submaxillary mucin (BSM) and porcine gastric mucin (PGM) in SSFs was evaluated. Following optimisation of the SSFs, biorelevance of the developed SSFs to HS was assessed by their comparative physicochemical properties as well as dissolution profiles of three diverse model compounds (sildenafil citrate, efavirenz, and caffeine) which showed comparable profiles between the SSFs and HS. This work addresses the lack of uniformed biorelevant dissolution media for oral cavity dissolution studies and provides a basis for standardised dissolution tests that provide consistency and harmonisation in future oral cavity dissolution studies. We envisage that this will have a positive impact on the development of new medicines that require functionality in the oral cavity.


Asunto(s)
Desarrollo de Medicamentos/métodos , Liberación de Fármacos , Boca/metabolismo , Saliva/química , Administración Oral , Animales , Bovinos , Química Farmacéutica , Humanos , Concentración de Iones de Hidrógeno , Mucinas/química , Saliva/metabolismo , Solubilidad , Tensión Superficial , Porcinos
20.
Eur J Pharm Biopharm ; 158: 35-51, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33130339

RESUMEN

Acceptable palatability of an oral dosage form is crucial to patient compliance. Excipients can be utilised within a formulation to mask the bitterness of a drug. One such category is the bitter-blockers. This term is used inconsistently within the literature and has historically been used to describe any additive which alters the taste of an unpleasant compound. This review defines a bitter-blocker as a compound which interacts with the molecular pathway of bitterness at a taste-cell level and compiles data obtained from publication screening of such compounds. Here, a novel scoring system is created to assess their potential utility in a medicinal product using factors such as usability, safety, efficacy and quality of evidence to understand their taste-masking ability. Sodium acetate, sodium gluconate and adenosine 5'monophophate each have a good usability and safety profile and are generally regarded as safe and have shown evidence of bitter-blocking in human sensory panels. These compounds could offer a much needed option to taste-mask particularly aversive medicines where traditional methods alone are insufficient.


Asunto(s)
Excipientes/farmacología , Gusto/efectos de los fármacos , Administración Oral , Composición de Medicamentos/métodos , Excipientes/química , Humanos , Cumplimiento de la Medicación
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