Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 166
Filter
1.
Nature ; 579(7798): 224-228, 2020 03.
Article in English | MEDLINE | ID: mdl-32123353

ABSTRACT

Large-scale energy storage is becoming increasingly critical to balancing renewable energy production and consumption1. Organic redox flow batteries, made from inexpensive and sustainable redox-active materials, are promising storage technologies that are cheaper and less environmentally hazardous than vanadium-based batteries, but they have shorter lifetimes and lower energy density2,3. Thus, fundamental insight at the molecular level is required to improve performance4,5. Here we report two in situ nuclear magnetic resonance (NMR) methods of studying redox flow batteries, which are applied to two redox-active electrolytes: 2,6-dihydroxyanthraquinone (DHAQ) and 4,4'-((9,10-anthraquinone-2,6-diyl)dioxy) dibutyrate (DBEAQ). In the first method, we monitor the changes in the 1H NMR shift of the liquid electrolyte as it flows out of the electrochemical cell. In the second method, we observe the changes that occur simultaneously in the positive and negative electrodes in the full electrochemical cell. Using the bulk magnetization changes (observed via the 1H NMR shift of the water resonance) and the line broadening of the 1H shifts of the quinone resonances as a function of the state of charge, we measure the potential differences of the two single-electron couples, identify and quantify the rate of electron transfer between the reduced and oxidized species, and determine the extent of electron delocalization of the unpaired spins over the radical anions. These NMR techniques enable electrolyte decomposition and battery self-discharge to be explored in real time, and show that DHAQ is decomposed electrochemically via a reaction that can be minimized by limiting the voltage used on charging. We foresee applications of these NMR methods in understanding a wide range of redox processes in flow and other electrochemical systems.


Subject(s)
Electric Power Supplies , Magnetic Resonance Spectroscopy , Electrolytes/chemistry , Electrons , Oxidation-Reduction
2.
PLoS Biol ; 20(8): e3001758, 2022 08.
Article in English | MEDLINE | ID: mdl-35998206

ABSTRACT

Many diseases linked with ethnic health disparities associate with changes in microbial communities in the United States, but the causes and persistence of ethnicity-associated microbiome variation are not understood. For instance, microbiome studies that strictly control for diet across ethnically diverse populations are lacking. Here, we performed multiomic profiling over a 9-day period that included a 4-day controlled vegetarian diet intervention in a defined geographic location across 36 healthy Black and White females of similar age, weight, habitual diets, and health status. We demonstrate that individuality and ethnicity account for roughly 70% to 88% and 2% to 10% of taxonomic variation, respectively, eclipsing the effects a short-term diet intervention in shaping gut and oral microbiomes and gut viromes. Persistent variation between ethnicities occurs for microbial and viral taxa and various metagenomic functions, including several gut KEGG orthologs, oral carbohydrate active enzyme categories, cluster of orthologous groups of proteins, and antibiotic-resistant gene categories. In contrast to the gut and oral microbiome data, the urine and plasma metabolites tend to decouple from ethnicity and more strongly associate with diet. These longitudinal, multiomic profiles paired with a dietary intervention illuminate previously unrecognized associations of ethnicity with metagenomic and viromic features across body sites and cohorts within a single geographic location, highlighting the importance of accounting for human microbiome variation in research, health determinants, and eventual therapies. Trial Registration: ClinicalTrials.gov ClinicalTrials.gov Identifier: NCT03314194.


Subject(s)
Gastrointestinal Microbiome , Microbiota , Bacteria/genetics , Ethnicity , Feces , Female , Gastrointestinal Microbiome/genetics , Humans , Microbiota/genetics , Virome
3.
J Biol Chem ; 299(2): 102871, 2023 02.
Article in English | MEDLINE | ID: mdl-36621623

ABSTRACT

Ca2+ puffs are brief, localized Ca2+ signals evoked by physiological stimuli that arise from the coordinated opening of a few clustered inositol 1,4,5-trisphosphate receptors (IP3Rs). However, the mechanisms that control the amplitude and termination of Ca2+ puffs are unresolved. To address these issues, we expressed SNAP-tagged IP3R3 in HEK cells without endogenous IP3Rs and used total internal reflection fluorescence microscopy to visualize the subcellular distribution of IP3Rs and the Ca2+ puffs that they evoke. We first confirmed that SNAP-IP3R3 were reliably identified and that they evoked normal Ca2+ puffs after photolysis of a caged analog of IP3. We show that increased IP3R expression caused cells to assemble more IP3R clusters, each of which contained more IP3Rs, but the mean amplitude of Ca2+ puffs (indicative of the number of open IP3Rs) was unaltered. We thus suggest that functional interactions between IP3Rs constrain the number of active IP3Rs within a cluster. Furthermore, Ca2+ puffs evoked by IP3R with reduced affinity for IP3 had undiminished amplitude, but the puffs decayed more quickly. The selective effect of reducing IP3 affinity on the decay times of Ca2+ puffs was not mimicked by exposing normal IP3R to a lower concentration of IP3. We conclude that distinct mechanisms constrain recruitment of IP3Rs during the rising phase of a Ca2+ puff and closure of IP3Rs during the falling phase, and that only the latter is affected by the rate of IP3 dissociation.


Subject(s)
Calcium Signaling , Calcium , Inositol 1,4,5-Trisphosphate Receptors , Inositol 1,4,5-Trisphosphate , Calcium/metabolism , Inositol 1,4,5-Trisphosphate/metabolism , Inositol 1,4,5-Trisphosphate Receptors/genetics , Inositol 1,4,5-Trisphosphate Receptors/metabolism , Humans , Microscopy, Fluorescence , HEK293 Cells
4.
PLoS Pathog ; 18(2): e1010276, 2022 02.
Article in English | MEDLINE | ID: mdl-35130301

ABSTRACT

Formation of gametes in the malaria parasite occurs in the midgut of the mosquito and is critical to onward parasite transmission. Transformation of the male gametocyte into microgametes, called microgametogenesis, is an explosive cellular event and one of the fastest eukaryotic DNA replication events known. The transformation of one microgametocyte into eight flagellated microgametes requires reorganisation of the parasite cytoskeleton, replication of the 22.9 Mb genome, axoneme formation and host erythrocyte egress, all of which occur simultaneously in <20 minutes. Whilst high-resolution imaging has been a powerful tool for defining stages of microgametogenesis, it has largely been limited to fixed parasite samples, given the speed of the process and parasite photosensitivity. Here, we have developed a live-cell fluorescence imaging workflow that captures the entirety of microgametogenesis. Using the most virulent human malaria parasite, Plasmodium falciparum, our live-cell approach captured early microgametogenesis with three-dimensional imaging through time (4D imaging) and microgamete release with two-dimensional (2D) fluorescence microscopy. To minimise the phototoxic impact to parasites, acquisition was alternated between 4D fluorescence, brightfield and 2D fluorescence microscopy. Combining live-cell dyes specific for DNA, tubulin and the host erythrocyte membrane, 4D and 2D imaging together enables definition of the positioning of newly replicated and segregated DNA. This combined approach also shows the microtubular cytoskeleton, location of newly formed basal bodies, elongation of axonemes and morphological changes to the erythrocyte membrane, the latter including potential echinocytosis of the erythrocyte membrane prior to microgamete egress. Extending the utility of this approach, the phenotypic effects of known transmission-blocking inhibitors on microgametogenesis were confirmed. Additionally, the effects of bortezomib, an untested proteasomal inhibitor, revealed a clear block of DNA replication, full axoneme nucleation and elongation. Thus, as well as defining a framework for broadly investigating microgametogenesis, these data demonstrate the utility of using live imaging to validate potential targets for transmission-blocking antimalarial drug development.


Subject(s)
Cytoskeleton/metabolism , Gametogenesis , Malaria, Falciparum/parasitology , Optical Imaging/methods , Plasmodium falciparum/cytology , Plasmodium falciparum/physiology , Animals , Cell Membrane/metabolism , DNA, Protozoan/metabolism , Erythrocytes/parasitology , Germ Cells/physiology , Humans , Imaging, Three-Dimensional/methods , Protozoan Proteins/metabolism , Workflow
5.
World J Urol ; 42(1): 159, 2024 Mar 15.
Article in English | MEDLINE | ID: mdl-38488875

ABSTRACT

PURPOSE: We aimed to assess whether the presence of contaminants in the pre-operative urine culture (preop-UC) predicts postoperative urinary tract infection (postop-UTI) in patients undergoing elective ureteroscopy with laser lithotripsy. METHODS: A retrospective chart review was performed from 01/2019 to 12/2021 examining patients with unilateral stone burden ≤ 2 cm who underwent ureteroscopy with laser lithotripsy and had a preop-UC within 3 months. Positive, negative, contaminated, and polymicrobial definitions for UCs were established in accordance with current guidelines. Patients with positive and polymicrobial cultures were excluded. Postop-UTI was defined as the presence of urinary symptoms and a positive UC within 30 days of the procedure. Multivariable logistic regression models were utilized to evaluate risk factors for contamination in the preop-UC and the risk of postop-UTI. RESULTS: A total of 201 patients met the inclusion-exclusion criteria. Preop-UC was negative in 153 patients and contaminated in 48 patients. Significant contaminant-related factors included female gender and increased BMI. Postop-UTI was diagnosed in 3.2% of patients with negative preop-UCs and 4.2% of patients with contaminants, with no difference between groups (p = 0.67). The regression model determined that the presence of contaminants in preop-UC failed to predict postop-UTI (OR 0.69, p = 0.64). CONCLUSION: The presence of contaminants in preop-UCs is not associated with an increased risk of postop-UTIs after ureteroscopy. Our study supports that contaminants in the preop-UC can be interpreted as a negative UC in terms of postop-UTI risk stratification. Preoperative antibiotics should not be prescribed for patients undergoing uncomplicated ureteroscopy for stone surgery in the setting of a contaminated preop-UC.


Subject(s)
Ureteroscopy , Urinary Tract Infections , Humans , Female , Retrospective Studies , Ureteroscopy/adverse effects , Ureteroscopy/methods , Urinary Tract Infections/epidemiology , Urinary Tract Infections/etiology , Urinary Tract Infections/drug therapy , Urinalysis , Anti-Bacterial Agents/therapeutic use , Postoperative Complications/etiology
6.
Phys Chem Chem Phys ; 2024 Jul 09.
Article in English | MEDLINE | ID: mdl-38979604

ABSTRACT

The solvation of dissolved transition metal ions in lithium-ion battery electrolytes is not well-characterised experimentally, although it is important for battery degradation mechanisms governed by metal dissolution, deposition, and reactivity in solution. This work identifies the coordinating species in the Mn2+ and Ni2+ solvation spheres in LiPF6/LiTFSI-carbonate electrolyte solutions by examining the electron-nuclear spin interactions, which are probed by pulsed EPR and paramagnetic NMR spectroscopy. These techniques investigate solvation in frozen electrolytes and in the liquid state at ambient temperature, respectively, also probing the bound states and dynamics of the complexes involving the ions. Mn2+ and Ni2+ are shown to primarily coordinate to ethylene carbonate (EC) in the first coordination sphere, while PF6- is found primarily in the second coordination sphere, although a degree of contact ion pairing does appear to occur, particularly in electrolytes with low EC concentrations. NMR results suggest that Mn2+ coordinates more strongly to PF6- than to TFSI-, while the opposite is true for Ni2+. This work provides a framework to experimentally determine the coordination spheres of paramagnetic metals in battery electrolyte solutions.

7.
Nature ; 623(7989): 922, 2023 Nov.
Article in English | MEDLINE | ID: mdl-38012373
8.
Nutr Metab Cardiovasc Dis ; 34(7): 1712-1720, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38658223

ABSTRACT

BACKGROUND AND AIMS: The cardiometabolic disease-associated metabolite, alpha-aminoadipic acid (2-AAA) is formed from the breakdown of the essential dietary amino acid lysine. However, it was not known whether elevated plasma levels of 2-AAA are related to dietary nutrient intake. We aimed to determine whether diet is a determinant of circulating 2-AAA in healthy individuals, and whether 2-AAA is altered in response to dietary modification. METHODS AND RESULTS: We investigated the association between 2-AAA and dietary nutrient intake in a cross-sectional study of healthy individuals (N = 254). We then performed a randomized cross-over dietary intervention trial to investigate the effect of lysine supplementation (1 week) on 2-AAA in healthy individuals (N = 40). We further assessed the effect of a vegetarian diet on 2-AAA in a short-term (4-day) dietary intervention trial in healthy omnivorous women (N = 35). We found that self-reported dietary intake of animal products, including meat, poultry, and seafood, was associated with higher plasma 2-AAA cross-sectionally (P < 0.0001). Supplementary dietary lysine (5g/day) caused no significant increase in plasma 2-AAA; however, plasma 2-AAA was altered by general dietary modification. Further, plasma 2-AAA was significantly reduced by a short-term vegetarian diet (P = 0.003). CONCLUSION: We identified associations between plasma 2-AAA and consumption of animal products, which were validated in a vegetarian dietary intervention trial, but not in a trial designed to specifically increase the 2-AAA amino acid precursor lysine. Further studies are warranted to investigate whether implementation of a vegetarian diet improves cardiometabolic risk in individuals with elevated 2-AAA.


Subject(s)
2-Aminoadipic Acid , Biomarkers , Cross-Over Studies , Diet, Vegetarian , Dietary Supplements , Lysine , Meat , Humans , Female , Male , Cross-Sectional Studies , Adult , 2-Aminoadipic Acid/blood , Lysine/blood , Lysine/administration & dosage , Middle Aged , Biomarkers/blood , Seafood , Young Adult , Nutritive Value , Time Factors , Poultry
9.
Mycoses ; 66(11): 960-968, 2023 Nov.
Article in English | MEDLINE | ID: mdl-37553558

ABSTRACT

OBJECTIVES: Chronic pulmonary aspergillosis (CPA) is associated with significant mortality, and suboptimal antifungal treatment response. We describe predictive factors for treatment response and survival. METHODS: We retrospectively analysed clinical, serological and radiological parameters at baseline and following antifungal treatment in patients with CPA and correlated with clinical and radiological response and survival. RESULTS: Fifty-nine patients were included with a mean age of 61 years. Thirty (51%) had a diagnosis of COPD. On clinical assessment at 6 months, 21 (36%) had clinically improved, 20 (34%) were clinically stable and 15 (25%) had deteriorated. Radiological improvement was observed in 30 (53%), stability in 11 (19%) and deterioration in 16 (28%). Only a lower C-reactive protein (CRP) at baseline was associated with a favourable clinical-radiological response. On univariate analysis, lower CRP, higher albumin, lower Aspergillus IgG and use of inhaled steroids were associated with lower mortality. An overall favourable response at 6 months was associated with lower mortality. CONCLUSION: Inflammatory markers and Aspergillus IgG were predictors of mortality in CPA. This suggests that mortality in CPA is driven mainly by the chronic fungal infection itself rather than the underlying disease, therefore early optimised treatment of CPA may lead to improved outcomes.


Subject(s)
Antifungal Agents , Pulmonary Aspergillosis , Humans , Middle Aged , Antifungal Agents/therapeutic use , Retrospective Studies , Chronic Disease , Pulmonary Aspergillosis/diagnosis , Persistent Infection , Immunoglobulin G
10.
Child Care Health Dev ; 49(5): 879-888, 2023 09.
Article in English | MEDLINE | ID: mdl-36633565

ABSTRACT

AIM: This study explored caregiver-reported first signs of autism and caregiver experiences of reporting these signs to health professionals using a multiple methods approach. BACKGROUND: Within the Australian context, children who have been diagnosed with autism represent a significant proportion of individuals requiring access to disability services. Due to the importance of accessing early intervention services to support future outcomes, it is vital that first signs are noticed, reported, and the diagnosis process begun as soon as possible. METHOD: Phase 1 of the study included a secondary analysis of a survey of caregivers, while phase 2 consisted of focus groups of caregivers of children on the autism spectrum. RESULTS: Survey data indicated that most children were aged 12-18 months when first signs were noticed, with first signs noticed earlier in females than males. Children were age 2-6 years when caregivers sought advice and received a diagnosis. Uncertainty and a lack of information often left caregivers feeling frustrated and under-supported when seeking advice and diagnosis. Despite first signs being recognised early by caregivers, barriers to information and seeking help and support resulted in significant delays in receiving a diagnosis. CONCLUSIONS: The study provides valuable consideration of the caregiver perspective regarding reported first signs of autism and the additional challenges faced by caregivers living in regional and rural areas. By being more informed of what caregivers first notice, health professionals may also be able to provide better support and advice to caregivers in regard to access to diagnosis and early intervention services.


Subject(s)
Autism Spectrum Disorder , Autistic Disorder , Male , Child , Female , Humans , Autistic Disorder/diagnosis , Caregivers , Australia , Emotions , Surveys and Questionnaires
11.
Nurs Adm Q ; 2023 Dec 19.
Article in English | MEDLINE | ID: mdl-38112696

ABSTRACT

In the face of ever-evolving shifts in health care, the demand for advanced practice providers (APPs), including nurse practitioners and physician assistants, continues to grow as the nation faces provider shortages and increased patient complexity. Because of different educational backgrounds and previous professional experience, there is a gap in readiness for practice following completion of academic programs, leading to high rates of turnover and financial implications for health care institutions. The creation of APP fellowship programs is a strategy many health institutions implement to provide enhanced support for new graduate APPs. These programs offer fully licensed and credentialed nurse practitioners and physician assistants additional experience within medical specialty areas. The establishment and operational cost associated with an APP fellowship program is a significant barrier health systems face. This article discusses how Saint Luke's Health System developed an APP fellowship program to address these barriers. The model addresses specific fellow needs and has contributed to improved employee retention rates, increased clinical competency, and overall provider satisfaction within Saint Luke's Health System. The evolution of the model, successes, barriers, and opportunities for future program growth are discussed within this article.

12.
Lancet ; 398(10304): 981-990, 2021 09 11.
Article in English | MEDLINE | ID: mdl-34480858

ABSTRACT

BACKGROUND: COVID-19 vaccine supply shortages are causing concerns about compromised immunity in some countries as the interval between the first and second dose becomes longer. Conversely, countries with no supply constraints are considering administering a third dose. We assessed the persistence of immunogenicity after a single dose of ChAdOx1 nCoV-19 (AZD1222), immunity after an extended interval (44-45 weeks) between the first and second dose, and response to a third dose as a booster given 28-38 weeks after the second dose. METHODS: In this substudy, volunteers aged 18-55 years who were enrolled in the phase 1/2 (COV001) controlled trial in the UK and had received either a single dose or two doses of 5 × 1010 viral particles were invited back for vaccination. Here we report the reactogenicity and immunogenicity of a delayed second dose (44-45 weeks after first dose) or a third dose of the vaccine (28-38 weeks after second dose). Data from volunteers aged 18-55 years who were enrolled in either the phase 1/2 (COV001) or phase 2/3 (COV002), single-blinded, randomised controlled trials of ChAdOx1 nCoV-19 and who had previously received a single dose or two doses of 5 × 1010 viral particles are used for comparison purposes. COV001 is registered with ClinicalTrials.gov, NCT04324606, and ISRCTN, 15281137, and COV002 is registered with ClinicalTrials.gov, NCT04400838, and ISRCTN, 15281137, and both are continuing but not recruiting. FINDINGS: Between March 11 and 21, 2021, 90 participants were enrolled in the third-dose boost substudy, of whom 80 (89%) were assessable for reactogenicity, 75 (83%) were assessable for evaluation of antibodies, and 15 (17%) were assessable for T-cells responses. The two-dose cohort comprised 321 participants who had reactogenicity data (with prime-boost interval of 8-12 weeks: 267 [83%] of 321; 15-25 weeks: 24 [7%]; or 44-45 weeks: 30 [9%]) and 261 who had immunogenicity data (interval of 8-12 weeks: 115 [44%] of 261; 15-25 weeks: 116 [44%]; and 44-45 weeks: 30 [11%]). 480 participants from the single-dose cohort were assessable for immunogenicity up to 44-45 weeks after vaccination. Antibody titres after a single dose measured approximately 320 days after vaccination remained higher than the titres measured at baseline (geometric mean titre of 66·00 ELISA units [EUs; 95% CI 47·83-91·08] vs 1·75 EUs [1·60-1·93]). 32 participants received a late second dose of vaccine 44-45 weeks after the first dose, of whom 30 were included in immunogenicity and reactogenicity analyses. Antibody titres were higher 28 days after vaccination in those with a longer interval between first and second dose than for those with a short interval (median total IgG titre: 923 EUs [IQR 525-1764] with an 8-12 week interval; 1860 EUs [917-4934] with a 15-25 week interval; and 3738 EUs [1824-6625] with a 44-45 week interval). Among participants who received a third dose of vaccine, antibody titres (measured in 73 [81%] participants for whom samples were available) were significantly higher 28 days after a third dose (median total IgG titre: 3746 EUs [IQR 2047-6420]) than 28 days after a second dose (median 1792 EUs [IQR 899-4634]; Wilcoxon signed rank test p=0·0043). T-cell responses were also boosted after a third dose (median response increased from 200 spot forming units [SFUs] per million peripheral blood mononuclear cells [PBMCs; IQR 127-389] immediately before the third dose to 399 SFUs per milion PBMCs [314-662] by day 28 after the third dose; Wilcoxon signed rank test p=0·012). Reactogenicity after a late second dose or a third dose was lower than reactogenicity after a first dose. INTERPRETATION: An extended interval before the second dose of ChAdOx1 nCoV-19 leads to increased antibody titres. A third dose of ChAdOx1 nCoV-19 induces antibodies to a level that correlates with high efficacy after second dose and boosts T-cell responses. FUNDING: UK Research and Innovation, Engineering and Physical Sciences Research Council, National Institute for Health Research, Coalition for Epidemic Preparedness Innovations, National Institute for Health Research Oxford Biomedical Research Centre, Chinese Academy of Medical Sciences Innovation Fund for Medical Science, Thames Valley and South Midlands NIHR Clinical Research Network, AstraZeneca, and Wellcome.


Subject(s)
COVID-19 Vaccines/administration & dosage , Immunogenicity, Vaccine/immunology , Randomized Controlled Trials as Topic , Vaccination , Adult , ChAdOx1 nCoV-19 , Female , Humans , Leukocytes, Mononuclear/immunology , Male , Middle Aged , Time Factors , United Kingdom
13.
Anal Bioanal Chem ; 414(13): 3791-3802, 2022 May.
Article in English | MEDLINE | ID: mdl-35416505

ABSTRACT

The black-legged tick, Ixodes scapularis, is a well-known vector for the Lyme disease-causing pathogen (Borrelia burgdorferi) but can also carry other disease-causing pathogens such as Rickettsia, Anaplasma, Bartonella, Ehrlichia, and Theileria. Hence, tick screening using highly specific protein signatures for specific pathogens will help assess the prevalence of infected ticks and understand the pathogen-tick interactions in a specific geographic area. In this study, we used data-dependent acquisition to key pathogen protein signatures in black-legged ticks collected from the Southern Tier New York. Bottom-up proteomic analysis of extract from five combined ticks identified 2,052 tick proteins and 41 pathogen proteins with high confidence (≥ 99% C.I.). Results show high peptide spectral match counts for Rickettsia species and Borrelia species and lower counts for other rarer pathogens such as Anaplasma phagocytophilum. Parallel reaction monitoring performed on protein extracts from individual ticks (n = 10) revealed that 8 out of the 10 screened ticks carried Rickettsia species, 5 carried Borrelia species, 3 carried both pathogens, and only 1 tick carried no detectable bacteria. Mass spectrometry-based proteomics is a highly specific way to define the expression of different types of pathogen proteins in infected ticks. This might bring insights into the tick-pathogen interactions at the molecular level and especially expression pathogen surface proteins in ticks.


Subject(s)
Borrelia , Ixodes , Rickettsia , Animals , Ixodes/microbiology , Mass Spectrometry , Proteomics
14.
Gerontol Geriatr Educ ; 43(2): 173-184, 2022.
Article in English | MEDLINE | ID: mdl-32752937

ABSTRACT

OBJECTIVE: This study designed a pilot elective course to augment geriatric education in undergraduate and medical students, and secondarily to investigate an alternative individual cognitive stimulation therapy (iCST) platform. METHODS: Student participants (SPs) were recruited over five semesters to create and deliver iCST sessions to geriatric participants (GPs) for 10 weeks. Likert scale survey items and open-ended questions were used to evaluate the success of the SPs. Pre- and post-Saint Louis University Mental Status (SLUMS) exam and Quality of Life in Alzheimer's disease (QOL-AD) scores were obtained and a paired t-test determined whether the novel iCST model significantly improved GPs' cognition and/or quality of life. RESULTS: Thirty SPs and 10 GPs successfully completed the pilot course and iCST intervention. Ninety-three percent of all SPs rated the course positively and 100% felt the course was relevant to their future careers. The iCST model also yielded positive results, including a 3.8-point increase in quality of life for the GP, as measured by the QOL-AD (p = .01). SLUMS scores increased by 1.3-points, although failing to reach statistical significance (p = .25). CONCLUSIONS: This pilot has shown success in exposing students to geriatric-specific education and introducing an alternative iCST platform.


Subject(s)
Dementia , Education, Medical, Undergraduate , Education, Medical , Geriatrics , Aged , Cognition , Dementia/therapy , Geriatrics/education , Humans , Quality of Life
15.
Nursing ; 52(10): 20-27, 2022 Oct 01.
Article in English | MEDLINE | ID: mdl-36129500

ABSTRACT

ABSTRACT: Nurses who work in high-stress positions may be at risk for health problems that may result in early retirement. This article identifies health risks to aging nurses who continue to work in clinical settings and suggests methods for reducing negative health impacts to prevent them from retiring prematurely.


Subject(s)
Health Status , Retirement , Aging , Humans
16.
Angew Chem Int Ed Engl ; 61(32): e202202133, 2022 Aug 08.
Article in English | MEDLINE | ID: mdl-35415950

ABSTRACT

Sodium-ion batteries (SIBs) are a promising grid-level storage technology due to the abundance and low cost of sodium. The development of new electrolytes for SIBs is imperative since it impacts battery life and capacity. Currently, sodium hexafluorophosphate (NaPF6 ) is used as the benchmark salt, but is highly hygroscopic and generates toxic HF. This work describes the synthesis of a series of sodium borate salts, with electrochemical studies revealing that Na[B(hfip)4 ]⋅DME (hfip=hexafluoroisopropyloxy, Oi PrF ) and Na[B(pp)2 ] (pp=perfluorinated pinacolato, O2 C2 (CF3 )4 ) have excellent electrochemical performance. The [B(pp)2 ]- anion also exhibits a high tolerance to air and water. Both electrolytes give more stable electrode-electrolyte interfaces than conventionally used NaPF6 , as demonstrated by impedance spectroscopy and cyclic voltammetry. Furthermore, they give greater cycling stability and comparable capacity to NaPF6 for SIBs, as shown in commercial pouch cells.

17.
Nutr Metab Cardiovasc Dis ; 31(8): 2436-2448, 2021 07 22.
Article in English | MEDLINE | ID: mdl-34176710

ABSTRACT

BACKGROUND AND AIMS: The type of fat consumed in animal-based western diets, typically rich in the saturated fat palmitate, has been implicated in cardiometabolic disease risk. In contrast, the most abundant mono- and polyunsaturated fats, more typical in a vegetarian or plant-based diet, potentiate less deleterious effects. This study determined differences in plasma and urine metabolites when switching from omnivorous to vegetarian diet, including metabolites involved in fatty acid utilization. METHODS AND RESULTS: A prospective cohort of 38 European (EA) and African American (AA) omnivorous females were matched by age (25.7 ± 5.3y) and BMI (22.4 ± 1.9 kg/m2). Pre-intervention samples were collected while subjects consumed habitual animal-based diet. Changes in metabolites were assessed by ultra-high-performance liquid chromatography-tandem mass spectroscopy (Metabolon, Inc.) upon completing four days of novel vegetarian diet provided by the Vanderbilt Metabolic Kitchen. Changes in several diet-derived metabolites were observed, including increases in compounds derived from soy food metabolism along with decreases in metabolites of xanthine and histidine. Significant changes occurred in metabolites of saturated, monounsaturated and polyunsaturated fatty acids along with significant differences between EA and AA women in changes in plasma concentrations of acylcarnitines, which reflect the completeness of fatty acid oxidation (versus storage). CONCLUSION: These data suggest improvements in fatty acid metabolism (oxidation vs storage), a key factor in energy homeostasis, may be promoted rapidly by adoption of a vegetarian (plant-based) diet. Mechanistic differences in response to diet interventions must be understood to effectively provide protection against the widespread development of obesity and cardiometabolic disease in population subgroups, such as AA women.


Subject(s)
Diet, Healthy/ethnology , Diet, Vegetarian/ethnology , Energy Metabolism , Fatty Acids/metabolism , White People , Adult , Black or African American , Biomarkers/blood , Biomarkers/urine , Chromatography, High Pressure Liquid , Fatty Acids/blood , Fatty Acids/urine , Feeding Behavior/ethnology , Female , Humans , Metabolome , Metabolomics , Oxidation-Reduction , Prospective Studies , Tandem Mass Spectrometry , Tennessee , Young Adult
18.
J Interprof Care ; 35(5): 682-690, 2021.
Article in English | MEDLINE | ID: mdl-32841073

ABSTRACT

Chronic diseases are complex conditions requiring a range of health professionals to support lifestyle behavior change, with research indicating that interprofessional teams yield the most positive outcomes. Yet, little is known about the factors influencing collaboration between health professionals. This study aims to explore factors influencing interprofessional collaboration in health professionals involved in lifestyle behavior change (psychologists, exercise physiologists, and dietitians). Semi-structured interviews were undertaken with a convenience sample of 14 health professionals (four psychologists, seven exercise physiologists, three dietitians), individually or in small groups. Results from thematic analysis highlighted factors influencing collaboration in clinical practice at three levels: Systemic, professional, and client. Subthemes revealed time, financial costs, client consent, attitudes, role understanding, contact with other professions, interpersonal factors, accessibility of services, and profession-specific perspectives influenced collaboration in practice. In addition, psychologists were viewed as useful in specific areas of practice, with some unique barriers identified. The results suggest a need for barriers to interprofessional collaboration to be addressed, such as by co-location, exposure to other health professionals, and direct communication pathways. Implications include possible systemic changes and education to aid interprofessional practice in chronic disease. Further exploration of collaboration in broader professions and sectors, and client factors is recommended.


Subject(s)
Nutritionists , Cooperative Behavior , Health Personnel , Humans , Interprofessional Relations , Qualitative Research
19.
Public Health Nurs ; 36(4): 507-513, 2019 07.
Article in English | MEDLINE | ID: mdl-31099919

ABSTRACT

OBJECTIVE: Dog programs occurring in prison tend to generate positive public opinion and media portrayals, yet they often lack empirical validation. This is the first study to examine the key themes that drive a dog program aimed at incarcerated youth serving time in an adult prison. DESIGN AND SAMPLE: A sample of male youth (n = 31) were provided survey questions on a rescue dog program. A grounded qualitative approach was employed with open-ended responses. RESULTS: The following themes emerged: the symbolism of the dog its role in therapy, perceptions of positive behaviors and rehabilitation, a sense of normality, and universal support by inmates. CONCLUSION: This study supports the potential for utilizing rescue dogs in therapeutic interventions in which the vulnerable inmate can discuss early trauma, interpersonal dysfunction and histories of deviance. The dog symbolized the potential for incarcerated youth to engage in discussion of sensitive topics in a safe manner. Policy implications also include the function of dogs in creating a normalizing effect on the prison unit itself, one that can promote rehabilitation. There was universal support for the program which is rare in the prison milieu. Theoretically, positive outcomes occurred in an indirect manner, though more research is needed.


Subject(s)
Animal Assisted Therapy/methods , Criminals/psychology , Prisoners/psychology , Adolescent , Adult , Animals , Criminals/statistics & numerical data , Dogs , Humans , Male , Prisoners/statistics & numerical data , Prisons/statistics & numerical data , Surveys and Questionnaires
20.
J Am Pharm Assoc (2003) ; 58(5): 554-560, 2018.
Article in English | MEDLINE | ID: mdl-30017370

ABSTRACT

OBJECTIVES: To evaluate the feasibility and effect of a pharmacist-led transitions-of-care (TOC) pilot targeted to patients at high risk of readmission on process measures, hospital readmissions, and emergency department (ED) visits. SETTING: Academic medical center in Colorado. PRACTICE DESCRIPTION: Pharmacists enrolled patients identified as high risk for readmission in a TOC pilot from July 2014 to July 2015. The pilot included medication reconciliation, medication counseling, case management or social work evaluation, a postdischarge telephone call, and an expedited primary care follow-up appointment. PRACTICE INNOVATION: Implementation and evaluation of the pharmacist-led TOC pilot program with risk score embedded into the electronic health record. EVALUATION: Comparison of TOC-related process measures and clinical outcomes between pilot patients and randomly matched control patients included readmissions or ED visits at 30 and 90 days. RESULTS: We enrolled 34 pilot patients and randomly matched them to 34 control patients. The intervention took an average of 57.1 minutes for pharmacists to deliver. More pilot patients had a case management or social work note compared with control patients (88% vs. 59%; P = 0.006 [statistically significant]). Readmission rates in pilot versus nonpilot patients, respectively, were 18% versus 24% (P = 0.547) at 30 days and 27% versus 39% (P = 0.296) at 90 days. The composite outcome of a readmission or ED visit in pilot versus nonpilot patients was 24% versus 30% (P = 0.580) at 30 days and 36% versus 49% (P = 0.319) at 90 days. CONCLUSION: A pharmacist-led TOC pilot demonstrates potential for reducing hospital readmissions. The intervention was time intensive and led to creation of a TOC pharmacist role to implement medication-related transitional care.


Subject(s)
Delivery of Health Care/organization & administration , Patient Transfer/organization & administration , Pharmacists/organization & administration , Pharmacy Service, Hospital/organization & administration , Case-Control Studies , Colorado , Emergency Service, Hospital/organization & administration , Female , Humans , Male , Medication Reconciliation/organization & administration , Middle Aged , Patient Discharge , Patient Readmission , Pilot Projects , Professional Role
SELECTION OF CITATIONS
SEARCH DETAIL