1,722 results match your criteria counterparts best

Layer-by-Layer Solution-Processed Organic Solar Cells with Perylene Diimides as Acceptors.

ACS Appl Mater Interfaces 2021 Jun 21. Epub 2021 Jun 21.

College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China.

Layer-by-layer (LBL) sequential solution processing of the active layer has been proven as an effective strategy to improve the performance of organic solar cells (OSCs), which could adjust vertical phase separation and improve device performance. Although perylene diimide (PDI) derivatives are typical acceptors with excellent photoelectric properties, there are few studies on PDI-based LBL OSCs. Herein, three PDI acceptors (TBDPDI-C, TBDPDI-C, and SdiPDI) were used to fabricate LBL and bulk heterojunction (BHJ) OSCs, respectively. Read More

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The effect of stress on the transcriptomes of circulating immune cells in patients with Gulf War Illness.

Life Sci 2021 Jun 15:119719. Epub 2021 Jun 15.

Institute for Neuro Immune Medicine, Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL, United States of America. Electronic address:

Aims: In an effort to gain further insight into the underlying mechanisms tied to disease onset and progression of Gulf War Illness (GWI), our team evaluated GWI patient response to stress utilizing RNA-Seq.

Main Methods: The protocol included blood collection before exercise challenge (baseline), at maximal exertion, and after exercise challenge (recovery - four hours post-exercise challenge). Peripheral blood mononuclear cell (PBMC) transcriptomics data were analyzed to understand why GWI patients process stressors differently from their healthy counterparts. Read More

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Structural properties of ultra-small thorium and uranium dioxide nanoparticles embedded in a covalent organic framework.

Chem Sci 2020 Apr 28;11(18):4648-4668. Epub 2020 Apr 28.

Lawrence Berkeley National Laboratory Berkeley CA 94720 USA

We report the structural properties of ultra-small ThO and UO nanoparticles (NPs), which were synthesized without strong binding surface ligands by employing a covalent organic framework (COF-5) as an inert template. The resultant NPs were used to observe how structural properties are affected by decreasing grain size within bulk actinide oxides, which has implications for understanding the behavior of nuclear fuel materials. Through a comprehensive characterization strategy, we gain insight regarding how structure at the NP surface differs from the interior. Read More

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Anaemia: A risk factor for death and adverse outcomes following surgery for acute lower limb ischaemia.

Vascular 2021 Jun 13:17085381211026167. Epub 2021 Jun 13.

Northern Vascular Centre, Freeman Hospital, Newcastle-upon-Tyne Hospitals, Newcastle, UK.

Introduction: Acute limb ischaemia (ALI) forms a significant part of the vascular surgery workload and carries with it high rates of morbidity and mortality. Anaemia is also common amongst vascular surgical patients and has been linked with poor outcomes in some subgroups. We aimed to assess the frequency of anaemia in patients with ALI and its impact on survival and complications following revascularisation to help direct future efforts to optimise outcomes in this patient group. Read More

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Use of available crop by-products as alternative bedding materials to wheat straw for rearing broilers.

Animal 2021 Jun 8;15(7):100260. Epub 2021 Jun 8.

Poultry Production Department, Agriculture College, Damietta University, Damietta 34517, Egypt.

The provision of suitable bedding for rearing broilers is an ongoing challenge for poultry producers. The aim of the present study was to evaluate the effect of using different types of crop residues as alternative bedding materials to wheat straw on growth performance, carcass traits, health, and welfare of broilers; moreover, the effects on the bedding and air quality were analyzed. We randomly assigned 180 1-day-old chickens (Cobb 500) across six bedding groups (three replicates of 10 birds each). Read More

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Empirical validation of gradient field models for an accurate ADC measured on clinical 3T MR systems in body oncologic applications.

Phys Med 2021 Jun 6;86:113-120. Epub 2021 Jun 6.

Radiology, University of Michigan, Ann Arbor, MI, United States.

Purpose: To empirically corroborate vendor-provided gradient nonlinearity (GNL) characteristics and demonstrate efficient GNL bias correction for human brain apparent diffusion coefficient (ADC) across 3T MR systems and spatial locations.

Methods: Spatial distortion vector fields (DVF) were mapped in 3D using a surface fiducial array phantom for individual gradient channels on three 3T MR platforms from different vendors. Measured DVF were converted into empirical 3D GNL tensors and compared with their theoretical counterparts derived from vendor-provided spherical harmonic (SPH) coefficients. Read More

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Anxiety Levels Amid the COVID-19 Lockdown in Saudi Arabia.

Int J Gen Med 2021 31;14:2161-2170. Epub 2021 May 31.

College of Public Health, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.

Objective: To assess the prevalence of anxiety and factors associated with it during the peak of the outbreak in Saudi Arabia.

Materials And Methods: This cross-sectional research screened the general public using the Generalized Anxiety Disorder Scale-7 to detect anxiety levels. The questionnaire was distributed online during May 2020, while lockdowns were enforced. Read More

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H/CO separations in multicomponent metal-adeninate MOFs with multiple chemically distinct pore environments.

Chem Sci 2020 Oct 15;11(47):12807-12815. Epub 2020 Oct 15.

Department of Chemistry, University of Pittsburgh Pittsburgh PA 15260 USA

Metal-organic frameworks constructed from multiple (≥3) components often exhibit dramatically increased structural complexity compared to their 2 component (1 metal, 1 linker) counterparts, such as multiple chemically unique pore environments and a plurality of diverse molecular diffusion pathways. This inherent complexity can be advantageous for gas separation applications. Here, we report two isoreticular multicomponent MOFs, bMOF-200 (4 components; Cu, Zn, adeninate, pyrazolate) and bMOF-201 (3 components; Zn, adeninate, pyrazolate). Read More

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October 2020

Characterizing Sport Specialization Patterns in Professional Women's Ice Hockey Players.

Bull Hosp Jt Dis (2013) 2021 Jun;79(2):93-97

Background: Early year-round training in a single sport has been associated with high rates of overuse injuries. Despite this increasingly well-known risk of early sport specialization, many young athletes elect to specialize in a single sport due to the perception that this practice gives them the best chance of attaining elite athletic status. However, early specialization in women's ice hockey has not previously been shown to be reliably associated with attainment of elite levels of performance. Read More

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Endurance running prevents the age-related decline of calcaneal bone stiffness.

Arch Osteoporos 2021 Jun 2;16(1):83. Epub 2021 Jun 2.

Centre for Sport Studies, Rey Juan Carlos University, C/ Camino del Molino s/n., 28943, Fuenlabrada, Spain.

This investigation presents a comparison of calcaneus bone stiffness of endurance runners of different ages and age-matched controls. We found that there was an age-associated decline in calcaneus bone stiffness in the control group while endurance runners prevented this decline, with a higher effect as the participants increased their age.

Purpose: Previous investigations have found that endurance runners have higher bone mineral density and other bone quality variables in mechanically loaded bones. Read More

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: A Novel Alternative Flour on Gluten-Free Bread.

Foods 2021 May 27;10(6). Epub 2021 May 27.

Department of Nutrition, College of Health Sciences, University of Brasília, Brasília 70910900, Brazil.

The demand for gluten-free products is rising, but their production with similar quality as their gluten counterparts is challenging. This study aimed to develop gluten-free bread samples using different concentrations of flour (0%, 12.5%, 25%, 37. Read More

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Nano-Motion Analysis for Rapid and Label Free Assessing of Cancer Cell Sensitivity to Chemotherapeutics.

Medicina (Kaunas) 2021 May 4;57(5). Epub 2021 May 4.

Laboratory of Biological Electron Microscopy, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.

: Optimization of chemotherapy is crucial for cancer patients. Timely and costly efficient treatments are emerging due to the increasing incidence of cancer worldwide. Here, we present a methodology of nano-motion analysis that could be developed to serve as a screening tool able to determine the best chemotherapy option for a particular patient within hours. Read More

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Analysis of Injuries and Pitching Performance Between Major League Baseball and Nippon Professional Baseball: A 2-Team Comparison Between 2015 to 2019.

Orthop J Sports Med 2021 May 18;9(5):23259671211008810. Epub 2021 May 18.

Hiroshima Toyo Carp, Hiroshima, Japan.

Background: There has been minimal research investigating injury and pitching performance differences between Major League Baseball (MLB) and other professional leagues.

Purpose/hypothesis: This 2-team comparison between MLB and Japan's Nippon Professional Baseball (NPB) involved affiliated players over 5 years. We hypothesized that teams would differ in the injury incidence, mechanism of injury, pitch velocity, and pitch type usage. Read More

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Ni- and Cu-co-Intercalated Layered Manganese Oxide for Highly Efficient Electro-Oxidation of Ammonia Selective to Nitrogen.

ACS Appl Mater Interfaces 2021 May 27. Epub 2021 May 27.

Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan.

We fabricated a thin film of layered MnO whose interlayer space was occupied by hydrated Ni and Cu ions. The process consisted of electrodeposition of layered MnO intercalated with tetrabutylammonium cations (TBA) by anodic oxidation of aqueous Mn ions in the presence of TBA, followed by ion exchange of the initially incorporated bulkier TBA with the denser transition metals in solution. The resulting layered MnO co-intercalated with Ni and Cu ions (NiCu/MnO) catalyzed the ammonia oxidation reaction (AOR) in an alkaline electrolyte with a much lower overpotential than its Ni- and Cu-intercalated single-cation counterparts. Read More

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"Getting to Know Them": Person-Centered Care for Patients With Dementia in Acute Care.

J Gerontol Nurs 2021 May 1;47(5):37-44. Epub 2021 May 1.

Older adults with dementia are reported to have twice as many hospital stays as their age-matched counterparts without dementia. Acute care hospitals are generally not equipped to provide best care for persons with dementia. The purpose of the current qualitative study was to gain an understanding of the needs and perspectives of nursing staff and patient care technicians regarding delivering person-centered care (PCC) to patients with dementia. Read More

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Prevalence and risk factors for the development of abdominal aortic calcification among the US population: NHANES study.

Arch Med Sci Atheroscler Dis 2021 20;6:e95-e101. Epub 2021 Apr 20.

Department of Cardiology, Marshall University, Huntington, WV, USA.

Introduction: Abdominal aortic calcification (AAC) is an important marker of subclinical cardiovascular disease and its prognosis. Advanced age, hypertension, smoking, dyslipidemia, diabetes mellitus, and higher truncal fat are known markers of AAC in studies conducted around the world. However, literature for these risk factors and their co-occurrence is limited in the US. Read More

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Effects of thymectomy on late-onset non-thymomatous myasthenia gravis: systematic review and meta-analysis.

Orphanet J Rare Dis 2021 May 20;16(1):232. Epub 2021 May 20.

Department of Cardiothoracic Surgery, Tianjin Medical University General Hospital, No.154, Anshan Road, Tianjin, China.

Background: The effects of thymectomy on late-onset non-thymomatous myasthenia gravis (NTMG) remain controversial. The objective of this study was to conduct a systematic review in order to answer two questions pertinent to late-onset NTMG: (1) do patients with late-onset NTMG experience the same effects from thymectomy as their early-onset counterparts? (2) Compared with conservative treatment, does thymectomy have any benefits for late-onset NTMG patients?

Methods: We searched the PubMed, EMBASE, and Cochrane Library databases for studies published from January 1, 1950 to March 10, 2021. Outcomes were measured via clinical stable remission/pharmacological remission (CSR/PR) and improvement rates. Read More

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Strategic Design of a Bifunctional [email protected] Hybrid to Replace the Noble Platinum for Dye-Sensitized Solar Cells and Hydrogen Evolution Reactions.

ACS Appl Mater Interfaces 2021 Jun 19;13(21):25010-25023. Epub 2021 May 19.

Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.

High-performance triiodide reduction reaction (IRR) catalysts in dye-sensitized solar cells (DSSCs) and hydrogen evolution reaction (HER) catalysts in electrochemical water splitting are extremely compelling for renewable energy conversion and storage. The best IRR and HER catalysts generally rely on the use of noble metal platinum (Pt), which suffers obstacles in real-world implementation. The rational design of efficient bifunctional IRR and HER catalysts based on inexpensive and earth-abundant elements to replace scarce Pt could enable low-cost photoelectric conversion and hydrogen production but is challenging and rarely reported. Read More

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Bouncing behavior of sub-four minute milers.

Sci Rep 2021 May 18;11(1):10501. Epub 2021 May 18.

School of Kinesiology, University of Michigan, 1402 Washington Heights, Ann Arbor, MI, 48109-2013, USA.

Elite middle distance runners present as a unique population in which to explore biomechanical phenomena in relation to running speed, as their training and racing spans a broad spectrum of paces. However, there have been no comprehensive investigations of running mechanics across speeds within this population. Here, we used the spring-mass model of running to explore global mechanical behavior across speeds in these runners. Read More

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Examining advanced nursing practice in Hong Kong and Guangzhou.

Int J Nurs Sci 2021 Apr 5;8(2):190-198. Epub 2021 Mar 5.

School of Nursing, Jinan University, Guangzhou, Guangdong, China.

Objective: There were studies evaluating advanced nursing practice independently in the mainland and Hong Kong Special Administrative Region of China, but there was no attempt to make a comparison of practice between them. This study employed a case study method to examine and compare advanced nursing practice in Hong Kong and Guangzhou.

Method: Purposive sampling method was used to recruit 24 advanced practice nurses (APN) who came from the specialty of medical, surgical and pediatric in Hong Kong and Guangzhou. Read More

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Exploring natural colorant behavior of husk of durum (Triticum durum Desf.) and bread (Triticum aestivum L.) wheat species for sustainable cotton fabric dyeing.

Environ Sci Pollut Res Int 2021 May 14. Epub 2021 May 14.

Department of Botany, Government College University Faisalabad, Faisalabad, 38000, Pakistan.

Revival of natural colorants in textile dyeing is one of the important strategies to reduce synthetic chemical-based environmental pollution. The study has been conducted to explore the coloring potential of durum (Triticum durum Desf.) and bread (Triticum astivum L. Read More

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Transverse mode instability and thermal effects in thulium-doped fiber amplifiers under high thermal loads.

Opt Express 2021 May;29(10):14963-14973

We experimentally analyze the average-power-scaling capabilities of ultrafast, thulium-doped fiber amplifiers. It has been theoretically predicted that thulium-doped fiber laser systems, with an emission wavelength around 2 µm, should be able to withstand much higher heat-loads than their Yb-doped counterparts before the onset of transverse mode instability (TMI) is observed. In this work we experimentally verify this theoretical prediction by operating thulium doped fibers at very high heat-load. Read More

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Evaluation of gas chromatography for the separation of a broad range of isotopic compounds.

Anal Chim Acta 2021 Jun 10;1165:338490. Epub 2021 Apr 10.

Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX, 76019, United States. Electronic address:

The separation of deuterated compounds from their protiated counterparts is essential in areas of drug discovery and development, investigating kinetic isotope effects and quantitative methods of non-mass spectrometry-based stable isotope dilution assay (non-MS SIDA). The separations of 47 isotopologue pairs of common compounds and drugs were achieved by gas-liquid chromatography, employing twelve different stationary phases. Polydimethylsiloxane phase, phenyl substituted polydimethylsiloxane phases, wax phases, ionic liquid phases, and chiral stationary phases were selected to encompass a wide polarity range and diverse chemical interactions. Read More

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Man's best friend in life and death: scientific perspectives and challenges of dog brain banking.

Geroscience 2021 May 10. Epub 2021 May 10.

Department of Ethology, ELTE Eötvös Loránd University, Budapest, Hungary.

Biobanking refers to the systematic collection, storage, and distribution of pre- or post-mortem biological samples derived from volunteer donors. The demand for high-quality human specimens is clearly demonstrated by the number of newly emerging biobanking facilities and large international collaborative networks. Several animal species are relevant today in medical research; therefore, similar initiatives in comparative physiology could be fruitful. Read More

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Effect of Advanced Shoe Technology on the Evolution of Road Race Times in Male and Female Elite Runners.

Front Sports Act Living 2021 22;3:653173. Epub 2021 Apr 22.

Health and Science Department, World Athletics, Manoco City, Monaco.

The influence of advanced footwear technology (thickness of light midsole foam and rigid plate) on distance running performances was analyzed during an 8-year period. Analysis of variance was used to measure effects of time, gender, shoe technology, and East African origin on male and female top 20 or top 100 seasonal best times in 10-kilometer races, half-marathons, and marathons. In both genders and three distance-running events, seasonal best times significantly decreased from 2017, which coincided with the introduction of the advanced footwear technology in distance running. Read More

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Protocol for assessing if behavioural functioning of infants born <29 weeks' gestation is improved by omega-3 long-chain polyunsaturated fatty acids: follow-up of a randomised controlled trial.

BMJ Open 2021 05 5;11(5):e044740. Epub 2021 May 5.

Discipline of Paediatrics, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia.

Introduction: During the last trimester of pregnancy, the fetal brain undergoes a rapid growth spurt and accumulates essential nutrients including docosahexaenoic acid (DHA). This takes place ex-utero for infants born <29 weeks' gestation, without the in-utero provisions of DHA. Infants born <29 weeks' are more likely to experience behavioural and emotional difficulties than their term-born counterparts. Read More

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Uncemented total hip arthroplasty can be used safely in the elderly population.

Bone Jt Open 2021 May;2(5):293-300

Division of Orthopaedics, St Michael's Hospital, Toronto, Canada.

Aims: "Get It Right First Time" (GIRFT) and NHS England's Best Practice Tariff (BPT) have published directives advising that patients over the ages of 65 (GIRFT) and 69 years (BPT) receiving total hip arthroplasty (THA) should receive cemented implants and have brought in financial penalties if this policy is not observed. Despite this, worldwide, uncemented component use has increased, a situation described as a 'paradox'. GIRFT and BPT do, however, acknowledge more data are required to support this edict with current policies based on the National Joint Registry survivorship and implant costs. Read More

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Analysis of Recent BLYP- and PBE-Based Range-Separated Double-Hybrid Density Functional Approximations for Main-Group Thermochemistry, Kinetics, and Noncovalent Interactions.

J Phys Chem A 2021 May 2;125(18):4026-4035. Epub 2021 May 2.

School of Chemistry, The University of Melbourne, Parkville 3010, Australia.

We investigate the effects of range separation of the exchange energy on electronic ground-state properties for recently published double-hybrid density functionals (DHDFs) with the extensive GMTKN55 database for general main-group thermochemistry, kinetics, and noncovalent interactions. We include the semiempirical range-separated DHDFs ωB2PLYP and ωB2GP-PLYP developed by our group for excitation energies, together with their ground-state-parametrized variants, which we denote herein as ωB2PLYP18 and ωB2GP-PLYP18. We also include the nonempirical range-separated DHDFs RSX-0DH and RSX-QIDH. Read More

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Are Smaller Nanoparticles Always Better? Understanding the Biological Effect of Size-Dependent Silver Nanoparticle Aggregation Under Biorelevant Conditions.

Int J Nanomedicine 2021 23;16:3021-3040. Epub 2021 Apr 23.

Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary.

Purpose: Silver nanoparticles (AgNPs) are one of the most commonly investigated nanomaterials, especially due to their biomedical applications. However, their excellent cytotoxic and antimicrobial activity is often compromised in biological media due to nanoparticle aggregation. In this work, the aggregation behavior and the related biological activity of three different samples of citrate capped silver nanoparticles, with mean diameters of 10, 20, and 50 nm, respectively, were examined. Read More

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Influence of Alumina Addition on the Optical Properties and the Thermal Stability of Titania Thin Films and Inverse Opals Produced by Atomic Layer Deposition.

Nanomaterials (Basel) 2021 Apr 20;11(4). Epub 2021 Apr 20.

Institute of Nanostructure and Solid State Physics & Center for Hybrid Nanostructures, Universität Hamburg, Luruper Chausse 149, 22761 Hamburg, Germany.

TiO thin films deposited by atomic layer deposition (ALD) at low temperatures (<100 °C) are, in general, amorphous and exhibit a smaller refractive index in comparison to their crystalline counterparts. Nonetheless, low-temperature ALD is needed when the substrates or templates are based on polymeric materials, as the deposition has to be performed below their glass transition or melting temperatures. This is the case for photonic crystals generated via ALD infiltration of self-assembled polystyrene templates. Read More

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