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1.
Clin Rehabil ; : 2692155241270968, 2024 Aug 13.
Artículo en Inglés | MEDLINE | ID: mdl-39135465

RESUMEN

OBJECTIVE: Owing to the lack of a suitable tool for detecting the unmet needs of young stroke survivors, this study aims to develop a validated questionnaire for evaluating these unmet needs. DESIGN: A cross-sectional, observational research design. SETTING: Chang Gung Memorial Hospital Linkou and Taoyuan branches in Taiwan. PARTICIPANTS: A total of 211 participants (average age 53 years; within 6 months post-stroke) completed the questionnaire. MAIN MEASURES: A qualitative approach was used to create an item pool. Experts verified item suitability, and content validity was evaluated using the item content validity index. Item analysis was applied to determine item quality, and factor analysis was used to explore construct validity. In addition, parallel analysis was employed to ascertain the optimal number of factors. RESULTS: The scale development procedure resulted in a 27-item questionnaire that assesses the unmet needs of young stroke survivors after a stroke. The item content validity index was 1.0. The Unmet Needs Questionnaire has five factors: restoring prestroke abilities and life, rehabilitation-related resources, social support and self-adjustment, economic and post-stroke life adjustment, and stroke-related information. These five factors accounted for 54% of the variance. Cronbach's alpha for the total scale was 0.91, while the alpha for the subscales ranged from 0.74 to 0.88. CONCLUSIONS: The Unmet Needs Questionnaire showed acceptable reliability and validity. It can help clinical professionals and government agencies identify stroke survivors' unmet needs and develop tailored care plans. Future research should explore the trajectory of post-stroke unmet needs using this tool.

2.
J Nurs Scholarsh ; 2024 Aug 26.
Artículo en Inglés | MEDLINE | ID: mdl-39187961

RESUMEN

INTRODUCTION: The effectiveness of health interventions delivered via a combination of in-person and electronic social networking services for caregivers of stroke survivors remains uncertain. This study evaluates the feasibility of implementing educational and peer support programs for these caregivers through such platforms. DESIGN: Quasi-experimental design. METHODS: This study included 105 caregiver-survivor dyads, with 54 dyads allocated to the intervention group and the remaining 51 to the control group. The LINE intervention comprised a combination of in-person and electronic social networking services including stroke and rehabilitation education, problem-solving skills training, long-term care information support, and 24-h peer and professional support for caregivers. The outcomes were assessed at baseline, after 1 month, and after 3 months, and encompassed caregivers' care burden, depressive symptoms, perceived social support, and quality of life, as well as the rehabilitation adherence and depressive symptoms of stroke survivors. Generalized estimating equations were used to examine group differences. The data were collected between August 2021 and October 2022. RESULTS: The average age of the caregivers was 48.3 years. Caregivers in the intervention group reported reduced care burdens and enhanced perceptions of social support and quality of life as compared to those in the control group. Additionally, stroke survivors in the intervention group were less likely to exhibit high-risk depressive symptoms. CONCLUSION: Delivering a stroke caregiver support intervention via in-person and electronic social networking services, such as LINE, effectively reduced the care burden for caregivers of stroke survivors. Additionally, it enhanced caregivers' perceived social support and quality of life. CLINICAL RELEVANCE: This study demonstrated that caregiver education and peer support programs administered through a combination of in-person and electronic social networking services can serve as an effective support system for the psychosocial health of stroke caregivers. These findings support the integration of such interventions into standard clinical practice by healthcare providers or governmental bodies.

3.
J Am Chem Soc ; 146(31): 21320-21334, 2024 Aug 07.
Artículo en Inglés | MEDLINE | ID: mdl-39058278

RESUMEN

The high-entropy silicon anodes are attractive for enhancing electronic and Li-ionic conductivity while mitigating volume effects for advanced Li-ion batteries (LIBs), but are plagued by the complicated elements screening process. Inspired by the resemblances in the structure between sphalerite and diamond, we have selected sphalerite-structured SiP with metallic conductivity as the parent phase for exploring the element screening of high-entropy silicon-based anodes. The inclusion of the Zn in the sphalerite structure is crucial for improving the structural stability and Li-storage capacity. Within the same group, Li-storage performance is significantly improved with increasing atomic number in the order of BZnSiP3 < AlZnSiP3 < GaZnSiP3 < InZnSiP3. Thus, InZnSiP3-based electrodes achieved a high capacity of 719 mA h g-1 even after 1,500 cycles at 2,000 mA g-1, and a high-rate capacity of 725 mA h g-1 at 10,000 mA g-1, owing to its superior lithium-ion affinity, faster electronic conduction and lithium-ion diffusion, higher Li-storage capacity and reversibility, and mechanical integrity than others. Additionally, the incorporation of elements with larger atomic sizes leads to greater lattice distortion and more defects, further facilitating mass and charge transport. Following these screening rules, high-entropy disordered-cation silicon-based compounds such as GaCuSnInZnSiP6, GaCu(or Sn)InZnSiP5, and CuSnInZnSiP5, as well as high-entropy compounds with mixed-cation and -anion compositions, such as InZnSiPSeTe and InZnSiP2Se(or Te), are synthesized, demonstrating improved Li-storage performance with metallic conductivity. The phase formation mechanism of these compounds is attributed to the negative formation energies arising from elevated entropy.

4.
Adv Mater ; 36(26): e2314054, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38573654

RESUMEN

A cost-effective, scalable ball milling process is employed to synthesize the InGeSiP3 compound with a cubic ZnS structure, aiming to address the sluggish reaction kinetics of Si-based anodes for Lithium-ion batteries. Experimental measurements and first-principles calculations confirm that the synthesized InGeSiP3 exhibits significantly higher electronic conductivity, larger Li-ion diffusivity, and greater tolerance to volume change than its parent phases InGe (or Si)P2 or In (or Ge, or Si)P. These improvements stem from its elevated configurational entropy. Multiple characterizations validate that InGeSiP3 undergoes a reversible Li-storage mechanism that involves intercalation, followed by conversion and alloy reactions, resulting in a reversible capacity of 1733 mA h g-1 with an initial Coulombic efficiency of 90%. Moreover, the InGeSiP3-based electrodes exhibit exceptional cycling stability, retaining an 1121 mA h g-1 capacity with a retention rate of ≈87% after 1500 cycles at 2000 mA g-1 and remarkable high-rate capability, achieving 882 mA h g-1 at 10 000 mA g-1. Inspired by the distinctive characteristic of high entropy, the synthesis is extended to high entropy GaCu (or Zn)InGeSiP5, CuZnInGeSiP5, GaCuZnInGeSiP6, InGeSiP2S (or Se), and InGeSiPSSe. This endeavor overcomes the immiscibility of different metals and non-metals, paving the way for the electrochemical energy storage application of high-entropy silicon-phosphides.

5.
BMC Geriatr ; 24(1): 307, 2024 Apr 02.
Artículo en Inglés | MEDLINE | ID: mdl-38566023

RESUMEN

BACKGROUND: Pressure injuries are a common and serious issue for bedridden residents in long-term-care facilities. Areas of bony prominences, such as the scapula, sacrum, and heels, are more likely to develop pressure injuries. The management of pressure injury wounds include dressing changes, repositioning, away from moisture, decreasing the occurrence of friction and shear, and more. Some supportive surfaces are also used for pressure injury cases such as gel pads, alternating pressure air mattresses, and air-fluidized beds. The aim of this case study was to determine whether the use of an artificial intelligent mattress can improve a nursing home resident with prolonged pressure injury. CASE PRESENTATION: A retrospective study design was conducted for this case study. A 79-year-old male developed a pressure injury in the sacrum. His pressure injury was initially at stage 4, with a score of 12 by the Braden scale. The PUSH score was 16. During 5.5 months of routine care plus the use of the traditional alternative air mattress, in the nursing home, the wound stayed in stage 3 but the PUSH score increased up to 11. An artificial intelligence mattress utilizing 3D InterSoft was used to detect the bony prominences and redistribute the external pressure of the skin. It implements a color guided schematic of 26 colors to indicate the amount of pressure of the skin. RESULTS: The wound size was decreased and all eczema on the resident's back diminished. The PUSH score was down to 6, as the artificial intelligent mattress was added into the routine care. The staff also reported that the resident's quality of sleep improved and moaning decreased. The hemiplegic side is at greater risk of developing pressure injury. CONCLUSIONS: This novice device appeared to accelerate wound healing in this case. In the future, more cases should be tested, and different care models or mattress can be explored.


Asunto(s)
Úlcera por Presión , Masculino , Humanos , Anciano , Úlcera por Presión/prevención & control , Úlcera por Presión/epidemiología , Estudios Retrospectivos , Inteligencia Artificial , Cicatrización de Heridas , Lechos
6.
Poult Sci ; 103(3): 103452, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38262336

RESUMEN

This study was conducted to investigate the effect of graded levels of ß-mannanase supplementation in broiler diets on growth performance, energy digestibility, and lesion scores in d-old birds fed mash, corn-soybean meal-based diets and raised to 42 d. Five dietary treatments were investigated: 1) positive control diet (PC) containing standard energy; 2) negative control (NC) with 100 kcal/kg diet reduction in AME compared to PC; 3) NC supplemented with 30 U/g ß-mannanase (NC + 30 U); 4) NC supplemented with 60 U/g ß-mannanase (NC + 60 U); and 5) NC supplemented with 90 U/g ß-mannanase (NC + 90 U). Each treatment had 6 replicate pens with 52 chicks per replicate. Data was analyzed using 1-way ANOVA, and means were separated by LSMEANS. Reduction of 100 kcal/kg feed (NC) resulted in an overall body weight gain reduction of 51 g (P < 0.05) and feed conversion loss of approximately 4 points (P < 0.05) compared to PC at 42 d of age. At the same time, supplementing ß-mannanase at 60 and 90 U/g improved growth performance parameters compared to NC, while 30 U/g did not result in significant improvements beyond NC; body weight gain was improved (P < 0.05) by 87, and 106 g when ß-mannanase was supplemented at 60 and 90 U/g, respectively, compared to NC. This corresponded to an improvement by 6 and 7 points in feed conversion for 60 and 90 U/g supplementation, respectively, compared to NC. Furthermore, AMEn was improved (P < 0.05) by 15, 97, and 116 kcal/kg at 42 d when ß-mannanase was added to NC at 30, 60, and 90 U/g, respectively. Digesta viscosity measured at 42 d was decreased (P < 0.05) by ß-mannanase supplementation of 60 and 90 U/g, compared to NC, while 42 d lesion scores were improved (P < 0.05) by ß-mannanase supplementation compared to NC. Data demonstrated that dietary supplementation of ß-mannanase improved growth performance, energy digestibility, and reduced viscosity and lesion scores when supplemented with diets with a reduced energy content of 100 kcal/kg compared to a standard energy diet.


Asunto(s)
Pollos , beta-Manosidasa , Animales , Dieta/veterinaria , Suplementos Dietéticos , Aumento de Peso
7.
Phys Chem Chem Phys ; 26(6): 5059-5069, 2024 Feb 07.
Artículo en Inglés | MEDLINE | ID: mdl-38258542

RESUMEN

The decomposition of methanol-d4 (CD3OD) on Rh nanoclusters grown by the deposition of Rh vapors onto an ordered thin film of Al2O3/NiAl(100) was studied, with various surface-probe techniques and largely under near-ambient-pressure (NAP) conditions. The results showed a superior reactivity of small Rh clusters (diameter < 1.5 nm) exposed to CD3OD at 5 × 10-3-0.1 mbar at 400 K; the gaseous production of CO and D2 from decomposed methanol-d4 per Rh surface site on the small Rh clusters with diameters of ∼1.1 nm was nearly 8 times that on large ones with diameters of ∼3.5 nm. The promotion of reactivity with decreased cluster size under NAP conditions was evidently greater than that under ultrahigh vacuum conditions. Moreover, the concentration of atomic carbon (C*; where * denotes adsorbate)-a key catalyst poisoner-yielded from the dissociation of CO* from dehydrogenated methanol-d4 was significantly smaller on small clusters (diameter < 1.5 nm). The NAP size effect on methanol-d4 decomposition involved the surface hydroxyl (OH*) from the little co-adsorbed water (H2O*) that was dissociated at a probability dependent on the cluster size. H2O* was more likely dissociated into OH* on small Rh clusters, by virtue of their more reactive d-band structure, and the OH* then effectively promoted the O-D cleavage of methanol-d4, as the rate-determining step, and thus the reaction probability; on the other hand, the OH* limited CO* dissociation on small Rh clusters via both adsorbate and lateral effects. These results suggest that the superior properties of small Rh clusters in both reactivity and anti-poisoning would persist and be highly applicable under "real-world" catalysis conditions.

8.
Top Stroke Rehabil ; 31(4): 361-371, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-37722691

RESUMEN

BACKGROUND: Good rehabilitation adherence leads to effective post-stroke recovery. However, some recovering patients experience post-stroke depressive symptoms, which can affect post-stroke health outcomes. Previous studies have not examined the effect of a combination of rehabilitation adherence and depressive symptoms on recovery after a stroke. OBJECTIVES: This study explored the combined predictive influence of rehabilitation adherence and post-stroke depressive symptoms on self-care abilities and quality of life in patients with stroke. METHODS: This prospective longitudinal study analyzed data from 75 stroke patients. We examined rehabilitation adherence (self-reported, five-point scale), post-stroke depressive symptoms (Taiwanese Depression Scale), self-care ability (Chinese versions of the Barthel Index and Lawton - Brody Instrumental Activities of Daily Living Scale), and post-stroke quality of life (World Health Organization Quality of Life-BREF). Patients were followed up for six months after inclusion. The influence of rehabilitation adherence and post-stroke depressive symptoms on post-stroke self-care abilities and quality of life was examined using generalized estimating equations. RESULTS: The sample's mean age was 60.85 (±12.9) years. Patients with perfect rehabilitation adherence had better self-care abilities and quality of life than those with imperfect rehabilitation adherence. Patients without post-stroke depressive symptoms had a better quality of life than their counterparts. Patients with perfect rehabilitation adherence and no post-stroke depressive symptoms had better self-care abilities and quality of life than those with imperfect rehabilitation adherence and post-stroke depressive symptoms. CONCLUSION: Both depressive symptoms and rehabilitation adherence behavior impacted the rehabilitation effect among patients who are recovering from a stroke.


Asunto(s)
Rehabilitación de Accidente Cerebrovascular , Accidente Cerebrovascular , Humanos , Persona de Mediana Edad , Accidente Cerebrovascular/complicaciones , Calidad de Vida , Depresión/etiología , Estudios Longitudinales , Actividades Cotidianas , Autocuidado , Estudios Prospectivos
9.
J Chem Phys ; 158(17)2023 May 07.
Artículo en Inglés | MEDLINE | ID: mdl-37129140

RESUMEN

We have studied the decomposition of methanol-d4 on thin film Al2O3/NiAl(100) under near-ambient-pressure conditions, with varied surface-probe techniques and calculations based on density-functional theory. Methanol-d4 neither adsorbed nor reacted on Al2O3/NiAl(100) at 400 K under ultrahigh vacuum conditions, whereas they dehydrogenated, largely to methoxy-d3 (CD3O*, * denoting adsorbates) and formaldehyde-d2 (CD2O*), on the surface when the methanol-d4 partial pressure was increased to 10-3 mbar and above. The dehydrogenation was facilitated by hydroxyl (OH* or OD*) from the dissociation of little co-adsorbed water; a small fraction of CD2O* interacted further with OH* (OD*) to form, via intermediate CD2OOH* (CD2OOD*), formic acid (DCOOH* or DCOOD*). A few surface carbonates were also yielded, likely on the defect sites of Al2O3/NiAl(100). The results suggest that alumina not only supports metal clusters but also participates in reactions under realistic catalytic conditions. One may consider accordingly the multiple functions of alumina while designing ideal catalysts.

10.
ACS Appl Mater Interfaces ; 15(14): 18217-18228, 2023 Apr 12.
Artículo en Inglés | MEDLINE | ID: mdl-36976826

RESUMEN

Selective exposure of active surfaces of Pt-based electrocatalysts has been demonstrated as an effective strategy to improve Pt utilization and promote oxygen reduction reaction (ORR) activity in fuel cell application. However, challenges remain in stabilizing those active surface structures, which often suffer undesirable degradation and poor durability along with surface passivation, metal dissolution, and agglomeration of Pt-based electrocatalysts. To overcome the aforementioned obstacles, we here demonstrate the unique (100) surface configuration enabling active and stable ORR performance for bimetallic Pt3Co nanodendrite structures. Using elaborate microscopy and spectroscopy characterization, it is revealed that the Co atoms are preferentially segregated and oxidized at the Pt3Co(100) surface. In situ X-ray absorption spectroscopy (XAS) shows that such (100) surface configuration prevents the oxygen chemisorption and oxide formation on active Pt during the ORR process. Thus, the Pt3Co nanodendrite catalyst shows not only a high ORR mass activity of 730 mA/mg at 0.9 V vs RHE, which is 6.6-fold higher than that of the Pt/C, but also impressively high stability with 98% current retention after the acceleration degradation test in acid media for 5000 cycles, far exceeding the Pt or Pt3Co nanoparticles. Density functional theory (DFT) calculation also confirms the lateral and structural effects from the segregated Co and oxides on the Pt3Co(100) surface in reducing the catalyst oxophilicity and the free energy for the formation of an OH intermediate in the ORR.

11.
Nanomicro Lett ; 15(1): 63, 2023 Mar 10.
Artículo en Inglés | MEDLINE | ID: mdl-36899146

RESUMEN

Si is considered as the promising anode materials for lithium-ion batteries (LIBs) owing to their high capacities of 4200 mAh g-1 and natural abundancy. However, severe electrode pulverization and poor electronic and Li-ionic conductivities hinder their practical applications. To resolve the afore-mentioned problems, we first demonstrate a cation-mixed disordered lattice and unique Li storage mechanism of single-phase ternary GaSiP2 compound, where the liquid metallic Ga and highly reactive P are incorporated into Si through a ball milling method. As confirmed by experimental and theoretical analyses, the introduced Ga and P enables to achieve the stronger resistance against volume variation and metallic conductivity, respectively, while the cation-mixed lattice provides the faster Li-ionic diffusion capability than those of the parent GaP and Si phases. The resulting GaSiP2 electrodes delivered the high specific capacity of 1615 mAh g-1 and high initial Coulombic efficiency of 91%, while the graphite-modified GaSiP2 (GaSiP2@C) achieved 83% of capacity retention after 900 cycles and high-rate capacity of 800 at 10,000 mA g-1. Furthermore, the LiNi0.8Co0.1Mn0.1O2//GaSiP2@C full cells achieved the high specific capacity of 1049 mAh g-1 after 100 cycles, paving a way for the rational design of high-performance LIB anode materials.

12.
Nano Lett ; 23(6): 2262-2268, 2023 Mar 22.
Artículo en Inglés | MEDLINE | ID: mdl-36913488

RESUMEN

The electrochemical CO2 reduction reaction (CO2RR) provides an alternative protocol to producing industrial chemicals with renewable electricity sources, and the highly selective, durable, and economic catalysts should expedite CO2RR applications. Here, we demonstrate a composite Cu-In2O3 catalyst in which a trace amount of In2O3 decorated on Cu surface greatly improves the selectivity and stability for CO2-to-CO reduction as compared to the counterparts (Cu or In2O3), realizing a CO faradaic efficiency (FECO) of 95% at -0.7 V (vs RHE) and no obvious degradation within 7 h. In situ X-ray absorption spectroscopy reveals that In2O3 undergoes the redox reaction and preserves the metallic state of Cu during the CO2RR process. Strong electronic interaction and coupling occur at the Cu/In2O3 interface which serves as the active site for selective CO2RR. Theoretical calculation confirms the roles of In2O3 in preventing oxidation and altering the electronic structure of Cu to assist COOH* formation and demote CO* adsorption at the Cu/In2O3 interface.

13.
J Clin Nurs ; 32(5-6): 950-962, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-36146911

RESUMEN

AIMS AND OBJECTIVES: To assess the concurrent validity between logbooks and a single-item rehabilitation adherence measurement for patients with stroke. Agreement between caregivers and patients and between caregivers and physical therapists regarding a single-item measurement was investigated, and its predictive validity was explored. BACKGROUND: Adherence to therapy is a primary determinant of treatment success. There are no standard instruments for measuring rehabilitation adherence available for stroke patients. DESIGN: Prospective longitudinal study. METHODS: Seventy-five patients with stroke were recruited, measured four times and followed for 6 months. The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist was used to ensure comprehensive reporting. Adherence was documented in logbooks, and single-item measurements were compared. Predictive validity was explored by assessing associations between adherence levels, self-care ability and health-related quality of life. The Spearman's correlation coefficients, weighted kappa, and generalised estimating equations statistics were used to explore the concurrent validity, measurement agreement, and predictive validity, respectively. RESULTS: Logbook records had a fair correlation (rs  = .23, p = .04) with the single-item rehabilitation adherence measurements. There was moderate agreement (kappa = 0.42, p < .001) between caregiver and patient assessments and fair agreement (kappa = 0.29, p = .017) between caregiver and physical therapist assessments of patients' rehabilitation adherence levels. Perfect rehabilitation adherence, based on the logbook and single-item measurements, predicted better scores for self-care ability and quality of life than imperfect rehabilitation adherence during 6 months after inclusion. CONCLUSIONS: There was fair concurrent validity between logbooks and single-item rehabilitation adherence measurements and moderate and fair adherence measure agreement between caregivers and patients and caregivers and physical therapists, respectively. Logbooks and single-item rehabilitation adherence measurements had adequate predictive validity. RELEVANCE TO CLINICAL PRACTICE: Single-item rehabilitation adherence measurement is a workable and straightforward method to assess stroke patients' rehabilitation adherence in busy clinical care settings. Caregivers can represent stroke patients regarding their reported rehabilitation adherence. PATIENT OR PUBLIC CONTRIBUTION: Patients were diagnosed with stroke in the study hospital. Rehabilitation physicians transferred patients to a research nurse who then screened them for the inclusion criteria and invited them and their family caregivers to participate in this study if they met the requirements. We also recruited seven physical therapists responsible for the physical therapy of the study participants. After participants signed informed consent, the research nurse encouraged participants to respond to research questions face to face, including rehabilitation adherence data, daily physical function, and quality of life. Each participant was measured four times at baseline and at 1, 3, and 6 months after inclusion in this study. Physical therapists had to score their patients' rehabilitation adherence levels before discharge. TRIAL REGISTRATION DETAILS: Not applicable.


Asunto(s)
Rehabilitación de Accidente Cerebrovascular , Accidente Cerebrovascular , Humanos , Calidad de Vida , Estudios Longitudinales , Estudios Prospectivos , Rehabilitación de Accidente Cerebrovascular/métodos
14.
J Herb Med ; 36: 100610, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36341465

RESUMEN

Introduction: Coronavirus disease-2019 (COVID-19) has affected more than 608 million people and has killed 6.5 million people in the world. A few studies showed traditional Chinese medicine can be beneficial for COVID-19 treatment. An herbal preparation Jin Si Herbal Tea (JS) was formulated with herbal extracts known for their potential to decrease spike protein and ACE2 interaction, 3CL, and TRPMSS2 protease activity, and thus aimed to evaluate the clinical course of JS co-treatment along with the usual treatment schedule given for severe COVID-19 patients. Methods: This retrospective cohort study included patients with severe COVID-19 admitted to Hualien Tzu Chi Hospital between June and July 2021. All the patients were co-treated with JS and the primary outcome was death. The secondary outcomes included laboratory exam, Ct value, clinical course, and hospital stays. There were 10 patients recruited in this study and divided into < 70 years and ≧ 70 years groups (n = 5 in each group). Results: Older patients (≧70 years) had a higher Charlson Comorbidity Index, VACO index, and lower hemoglobin levels than < 70 years patients. The trend of lymphocyte count, LDH, D-dimer, and Ct value of non-survivors was not consistent with previous studies. The death rate was 20% and the recovery rate to mild illness in 14 days was 40%. Conclusion: In conclusion, this is the first clinical study of JS co-treatment in severe COVID-19 patients. JS co-treatment might reduce death rate and recovery time. Further large-scale clinical trials would be expected.

15.
J Am Chem Soc ; 144(43): 19838-19848, 2022 Nov 02.
Artículo en Inglés | MEDLINE | ID: mdl-36257295

RESUMEN

Cation-disordered rock salts (DRXs), a new class of cathode materials for Li-ion batteries, have attracted a great amount of attention in recent years due to their fascinatingly simple cubic structure, highly diverse composition, and great electrochemical performance. As cations in DRXs are randomly distributed in a long range, how the cations are spatially arranged is an intriguing question for the community of solid-state materials chemistry. In this work, we report the vibrational structure of a series of Mn- and Fe-based DRXs with well-controlled compositions and reveal significant layered-like cation ordering in the DRXs. A scheme is proposed to describe how the layered-like anisotropy could exist in rock salt structures with an overall cubic diffraction pattern. Furthermore, we raise a model of Li-ion transport based on the proposed scheme, which complements the theory of Li percolation in DRXs. The electrochemical behavior of the DRX cathodes used in the study supports the scheme and clearly demonstrates the role of layered anisotropy in the battery performance of DRXs.

16.
ACS Nano ; 16(11): 18058-18070, 2022 Nov 22.
Artículo en Inglés | MEDLINE | ID: mdl-36259968

RESUMEN

O3-Type layered oxides are widely studied as cathodes for sodium-ion batteries (SIBs) due to their high theoretical capacities. However, their rate capability and durability are limited by tortuous Na+ diffusion channels and complicated phase evolution during Na+ extraction/insertion. Here we report our findings in unravelling the mechanism for dramatically enhancing the stability and rate capability of O3-NaNi0.5Mn0.5-xSbxO2 (NaNMS) by substitutional Sb doping, which can alter the coordination environment and chemical bonds of the transition metal (TM) ions in the structure, resulting in a more stable structure with wider Na+ transport channels. Furthermore, NaNMS nanoparticles are obtained by surface energy regulation during grain growth. The synergistic effect of Sb doping and nanostructuring greatly reduces the ionic migration energy barrier while increasing the reversibility of the structural evolution during repeated Na+ extraction/insertion. An optimized NaNMS-1 electrode delivers a reversible capacity of 212.3 mAh g-1 at 0.2 C and 74.5 mAh g-1 at 50 C with minimal capacity loss after 100 cycles at a low temperature of -20 °C. Such electrochemical performance is superior to most of the reported layered oxide cathodes used in rechargeable SIBs.

17.
Artículo en Inglés | MEDLINE | ID: mdl-36232074

RESUMEN

In recent years, with the trends in digital media and a shift in the sources of information, self-media has gradually become a unique new type of media with considerable potential. Numerous related studies have also indicated that participating in self-media positively impacts the elderly, especially in self-media regarding healthcare and welfare. However, research has seldom explored the demands and services for elderly participation in self-media. In this study, the research targets were 55-75 years of age, in good health, with a monthly disposable income of more than TWD 30,000 (N = 180). The research methods had two aims: (1) to analyze the current well-known self-media and websites related to healthcare; and (2) via the Kano Model questionnaire, to survey and explore the demand for self-media among the elderly. The results summarize and describe the preferred layout, content items, interaction methods, and information display of self-media content for the elderly. We anticipate designing a self-media website platform that meets the demands of the elderly and that continues to develop into social media platforms and audio-visual content in the future.


Asunto(s)
Internet , Medios de Comunicación Sociales , Anciano , Humanos , Nigeria , Encuestas y Cuestionarios
18.
Small ; 18(26): e2200972, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35618443

RESUMEN

Electrification of transportation has spurred the development of fast-charge energy storage devices. High-power lithium-ion batteries require electrode materials that can store lithium quickly and reversibly. Herein, the design and construction of a Nb2 O5-δ /graphite composite electrode that demonstrates remarkable rate capability and durability are reported. The presence of graphite enables the formation of a dominant Nb12 O29 phase and a minor T-Nb2 O5 phase. The high rate capability is attributed to the enhanced electronic conductivity and lower energy barriers for fast lithium diffusion in both Nb12 O29 and T-Nb2 O5 , as unraveled by density functional theory calculations. The excellent durability or long cycling life is originated from the coherent redox behavior of Nb ions and high reversibility of lithium intercalation/deintercalation, as revealed by operando X-ray absorption spectroscopy analysis. When tested in a half-cell at high cycling rates, the composite electrode delivers a specific capability of 120 mAh g-1 at 80 C and retains over 150 mAh g-1 after 2000 cycles at 30 C, implying that it is a highly promising anode material for fast-charging lithium-ion batteries.

19.
Vet Sci ; 9(3)2022 Mar 18.
Artículo en Inglés | MEDLINE | ID: mdl-35324870

RESUMEN

The animal industry, which focuses on producing protein for human consumption, is continuously seeking solutions that can enhance both animal performance and health at a low cost. Several feed additives are currently being used to improve the nutritive value of feed as well as replacing the subtherapeutic levels of antibiotic growth promoters (AGP). This study was designed to investigate the effect of a feed additive that is a blend of multi-strain Bacillus spp. probiotics and a xylanase in a 2 × 2 factorial dietary treatments design, testing two levels of the feed additive blend (0 and 100 g/MT) and two cereal grain types (corn and wheat) on live performance, gut lesions, environmental Clostridium perfringens load, and pathogen load in the digesta of broiler chickens (E. tenella, total aerobic count cells (APC), E. coli, and C. perfringens). Day-old chicks were randomly placed in 10 replicate pens per treatment with 52 birds per replicate and grown to 42 d of age. Data were analyzed by two-way ANOVA. At 42 d, birds fed EnzaPro were heavier (p < 0.0004) than unsupplemented birds. An improvement in FCR (p = 0.03) was observed from 1 to 42 d by approximately two points in both corn- and wheat-based diets supplemented with EnzaPro. In wheat-based diets, supplementing EnzaPro reduced (p < 0.0001) a 21 d lesion score of intestines with a further reduction (p < 0.02) at 42 d. EnzaPro reduced (p < 0.03) litter moisture by approximately 1% compared to non-supplemented EnzaPro in both corn- and wheat-based diets. Pathogen load in digesta (C. perfringens, E. tenella, APC, and E. coli) was reduced (p < 0.0002) when EnzaPro was supplemented in diets. It can be concluded that EnzaPro (a blend of DFM Bacillus spp (1 × 105 CFU/g feed) and xylanase (10 XU/g feed)) may be used in both corn- and wheat-based diets to improve the performance and gut health of broilers.

20.
ACS Appl Mater Interfaces ; 14(14): 16901-16910, 2022 Apr 13.
Artículo en Inglés | MEDLINE | ID: mdl-35357129

RESUMEN

Organic-molecular magnets based on a metal-organic framework with chemically tuned electronic and magnetic properties have been attracting tremendous attention due to their promising applications in molecular magnetic sensors, magnetic particle medicines, molecular spintronics, etc. Here, we investigated the magnetic behavior of a heterojunction comprising a ferromagnetic nickel (Ni) film and an organic semiconductor (OSC) 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) layer. Through the magneto-optical Kerr effect (MOKE), a photoemission electron microscopy (PEEM), X-ray magnetic circular dichroism (XMCD), and X-ray photoelectron spectroscopy (XPS), we found that the adsorption of F4-TCNQ on Cu(100)/Ni not only reverses the in-plane magnetization direction originally exhibited by the Ni layer but also results in enhanced magnetic ordering. Furthermore, the cyano group (CN) in adsorbed F4-TCNQ was found spin-polarized along with conspicuous charge transfer with Ni. The density functional theory (DFT) calculations suggest that the experimentally found spin polarization originates from hybridization between the CN group's π orbitals and Ni's d band. These findings signify that the hybrid states at the organic-ferromagnet interface play a key role in tailoring the magnetic behavior of interfaces. For the case of the F4-TCNQ and Ni heterojunction reported here, interface coupling is an antiferromagnetic one.

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