174,755 results match your criteria scaleresults composite

Controllable performance of a dopamine-modified silk fibroin-based bio-adhesive by doping metal ions.

Biomed Mater 2021 May 12. Epub 2021 May 12.

Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang Sci-Tech University, Hangzhou 310018 hangzhou, CN, Hangzhou, 310018, CHINA.

Bio-adhesives are essential for wound healing because of their convenience and safety. Although widely used as biomaterials, silk fibroin (SF)'s further application as bio-adhesive is hindered due to its weak stickiness with tissue and slow gelation speed. Here, a dopamine-modified silk fibroin-based bio-adhesive is fabricated by using genipin as the chemical cross-linking agent. Read More

View Article and Full-Text PDF

Arming wood carbon with carbon-coated mesoporous nickel-silica nanolayer as monolithic composite catalyst for steam reforming of toluene.

J Colloid Interface Sci 2021 Apr 30;599:650-660. Epub 2021 Apr 30.

College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, China. Electronic address:

Steam reforming is an effective measure for biomass tar elimination as well as H-rich syngas (H + CO) production. However, the granular or powdery Ni-based catalysts are prone to deactivation, which is caused by inappropriate mass transfer and clogging of catalyst bed. Herein, monolithic wood carbon (WC) with low-tortuosity microchannels is armed with a carbon-coated mesoporous nickel-silica nanocomposite (Ni-SiO@C) layer via an evaporation-induced self-assembly and calcination procedure for toluene (tar model compound) steam reforming. Read More

View Article and Full-Text PDF

Multilayered graphene/boron nitride/thermoplastic polyurethane composite films with high thermal conductivity, stretchability, and washability for adjustable-cooling smart clothes.

J Colloid Interface Sci 2021 Apr 28;599:611-619. Epub 2021 Apr 28.

Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan. Electronic address:

Polymers having high filler loading levels are not able to meet the increasing requirements of thermal interface materials by themselves; therefore, fillers and structures with unique advantages have been developed. In this study, mechanical mixing was used to disperse graphene nanoplatelets (GNPs) and boron nitride (BN) fillers inside thermoplastic polyurethane (TPU)-based films, which were then compounded into a multilayered structure. The multilayered BN-GNP/TPU composite film created during this study exhibited a high thermal conductivity of 6. Read More

View Article and Full-Text PDF

Organic matter interference with steroid hormone removal by single-walled carbon nanotubes - ultrafiltration composite membrane.

Water Res 2021 Apr 14;199:117148. Epub 2021 Apr 14.

Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany. Electronic address:

Composite adsorbent-ultrafiltration membranes for micropollutant removal are an interesting concept, although water matrix compounds, such as organic matter (OM), may interfere with micropollutant adsorption. To prevent this interference, the adsorbents such as single-walled carbon nanotubes (SWCNTs) can be deposited on the permeate side of an ultrafiltration membrane (UF) that can retain OM. In this study, the 'shielding' effect by different UF MWCOs of such an SWCNT-UF composite was evaluated for nine different types of OM. Read More

View Article and Full-Text PDF

Glass hybrid (glass ionomer) versus composite for non-carious cervical lesions: Survival, restoration quality and costs in randomized controlled trial after 3 years.

J Dent 2021 May 9:103689. Epub 2021 May 9.

Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Germany.

Objective: This study compared survival, restoration quality and costs of glass hybrid (GH; EQUIA Forte Fil/EQUIA Forte Coat) and resin composite restorations (RC; OptiBond FL/Filtek Supreme XTE) of sclerotic non-carious cervical lesions.

Methods: This is a cluster-randomized trial (ClinicalTrials.gov: NCT02631161). Read More

View Article and Full-Text PDF

Effect of aspirin treatment duration on clinical outcomes in acute coronary syndrome patients with early aspirin discontinuation and received P2Y12 inhibitor monotherapy.

PLoS One 2021 12;16(5):e0251109. Epub 2021 May 12.

National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.

Recent clinical trials showed that short aspirin duration (1 or 3 months) in dual antiplatelet therapy (DAPT) followed by P2Y12 inhibitor monotherapy reduced the risk of bleeding and did not increase the ischemic risk compared to 12-month DAPT in acute coronary syndrome (ACS) patients undergoing percutaneous coronary intervention (PCI). However, it is unclear about the optimal duration of aspirin in P2Y12 inhibitor monotherapy. The purpose of this study was to evaluate the influence of aspirin treatment duration on clinical outcomes in a cohort of ACS patients with early aspirin interruption and received P2Y12 inhibitor monotherapy. Read More

View Article and Full-Text PDF

Factors determining cognitive, motor and language scores in low birth weight infants from North India.

PLoS One 2021 12;16(5):e0251387. Epub 2021 May 12.

Department of Research, Innlandet Hospital Trust, Lillehammer, Norway.

Background: Children born with low birth weight (LBW) tend to have lower neurodevelopmental scores compared to term normal birth weight children. It is important to determine factors that influence neurodevelopment in these low birth weight children especially in the first 2-3 years of life that represents a period of substantial brain development.

Methods: This secondary data analysis was conducted using data from LBW infants enrolled soon after birth in an individually randomized controlled trial (RCT) and followed up till end of 1st year. Read More

View Article and Full-Text PDF

Procedural and 1-year outcomes following large vessel coronary artery perforation treated by covered stents implantation: Multicentre CRACK registry.

PLoS One 2021 12;16(5):e0249698. Epub 2021 May 12.

Department of Cardiology and Structural Heart Diseases, Medical University of Silesia, Katowice, Poland.

Background: Data regarding the clinical outcomes of covered stents (CSs) used to seal coronary artery perforations (CAPs) in the all-comer population are scarce. The aim of the CRACK Registry was to evaluate the procedural, 30-days and 1-year outcomes after CAP treated by CS implantation.

Methods: This multicenter all-comer registry included data of consecutive patients with CAP treated by CS implantation. Read More

View Article and Full-Text PDF

Association of knowledge and attitudes with the misuse of tranquilizers in parents: a study in Beirut (Lebanon).

Psychol Health 2021 May 12:1-14. Epub 2021 May 12.

Department of Preventive Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain.

Objective: To measure the association between knowledge, attitudes and practices of personal misuse of tranquilizers among parents of schoolchildren in Beirut (Lebanon).

Design: We carried out a cross-sectional study in 1396 adults recruited from parents of students of eleven public and private schools, from primary schools to high schools, using a Knowledge, Attitude and Practices (KAP) questionnaire of personal use of tranquilizers.

Main Outcome Measures: We assessed five patterns of tranquilizers' misuse: unprescribed use, shortened treatment, stored leftovers, doubled forgotten doses or taken when remembered, changed dose without medical recommendation, and a sixth composite outcome: 'any misuse'. Read More

View Article and Full-Text PDF

Activation of Carbonyl Oxygen Sites in β-Ketoenamine-Linked Covalent Organic Frameworks via Cyano Conjugation for Efficient Photocatalytic Hydrogen Evolution.

Small 2021 May 12:e2101017. Epub 2021 May 12.

Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education; Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing; College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China.

2D covalent organic frameworks (COFs) are drawing intense attention in heterogenous photocatalysis due to their porous, crystalline, and tailor-made structures. For highly efficient solar-to-chemical energy conversion, revealing and modulating active centers in the skeletons of COFs are of great importance but encounter severe challenges. Herein, it is demonstrated that cyano conjugation on a typical β-ketoenamine-linked COF via aldehyde-imine Schiff-base condensation contributes to an enhanced stable photocatalytic H -evolution rate of 1. Read More

View Article and Full-Text PDF

Coronary artery calcification and epicardial adipose tissue as independent predictors of mortality in COVID-19.

Int J Cardiovasc Imaging 2021 May 12. Epub 2021 May 12.

Cardiology Division, Montefiore Medical Center, 111 E 210th, Bronx, NY, 10467, USA.

Recent epidemiological studies have demonstrated that common cardiovascular risk factors are strongly associated with adverse outcomes in COVID-19. Coronary artery calcium (CAC) and epicardial fat (EAT) have shown to outperform traditional risk factors in predicting cardiovascular events in the general population. We aim to determine if CAC and EAT determined by Computed Tomographic (CT) scanning can predict all-cause mortality in patients admitted with COVID-19 disease. Read More

View Article and Full-Text PDF

Association of Left Ventricular Systolic Dysfunction Among Carriers of Truncating Variants in Filamin C With Frequent Ventricular Arrhythmia and End-stage Heart Failure.

JAMA Cardiol 2021 May 12. Epub 2021 May 12.

Heart Failure and Heart Transplantation Unit, Virgen del Rocio University Hospital, Sevilla, Spain.

Importance: Truncating variants in the gene encoding filamin C (FLNCtv) are associated with arrhythmogenic and dilated cardiomyopathies with a reportedly high risk of ventricular arrhythmia.

Objective: To determine the frequency of and risk factors associated with adverse events among FLNCtv carriers compared with individuals carrying TTN truncating variants (TTNtv).

Design, Setting, And Participants: This cohort study recruited 167 consecutive FLNCtv carriers and a control cohort of 244 patients with TTNtv matched for left ventricular ejection fraction (LVEF) from 19 European cardiomyopathy referral units between 1990 and 2018. Read More

View Article and Full-Text PDF

A novel photothermal, self-healing and anti-reflection water evaporation membrane.

Soft Matter 2021 May;17(18):4730-4737

The Key Laboratory of Synthetic and Biotechnology Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.

For the solar water evaporation system, there are no reports on the self-healing support, which is crucial for the sustainable use of solar evaporation membrane. In this work, a self-healing hydrogel is prepared via free radical copolymerization with covalent cross-linking and coordination cross-linking and is used as a photothermal water evaporation support. The photothermal material is then introduced into the hydrogel by physically doping acetylene carbon black. Read More

View Article and Full-Text PDF

Charge-storage mechanism of highly defective NiO nanostructures on carbon nanofibers in electrochemical supercapacitors.

Nanoscale 2021 May 12. Epub 2021 May 12.

Advanced Energy Storage Division, Center for Innovation on New Energies, Carbon Sci-Tech Labs, School of Electrical and Computer Engineering, University of Campinas, Av. Albert Einstein 400, Campinas, SP 13083-852, Brazil.

An electrode composed of highly defective nickel oxide (NiO) nanostructures supported on carbon nanofibers (CNFs) and immersed in an Li+-based aqueous electrolyte is studied using Raman spectroscopy under dynamic polarization conditions to address the charge-storage phenomenon. By this operando technique, the formation of Li2SO4·H2O during the discharge process is verified. At the same time, we observed the phase transformation of NiO to NiOOH. Read More

View Article and Full-Text PDF

Printable PICN Composite Mechanically Compatible with Human Teeth.

J Dent Res 2021 May 12:220345211012930. Epub 2021 May 12.

Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Kitakyushu, Fukuoka, Japan.

Polymer-infiltrated ceramic network (PICN) composites are mechanically compatible with human enamel, and are therefore promising dental restorative materials. Fabrication technology for PICN composites used in tooth restorative material has been established through computer-aided design/computer-aided manufacturing (CAD/CAM) milling, however, to date, has not been successfully developed using 3-dimensional (3D) printing. This study aimed to develop a 3D-printable PICN composite as a restorative material. Read More

View Article and Full-Text PDF

Genomic Analysis of Antibiotic-Resistant and -Susceptible Isolated from Bovine Sources in Maputo, Mozambique.

Foodborne Pathog Dis 2021 May 11. Epub 2021 May 11.

Environmental Microbial and Food Safety Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Maryland, USA.

This study reports a genomic analysis of isolates recovered from 25 bovine fecal composite samples collected from four different production units in Maputo city and around Maputo Province, Mozambique. The genomes were analyzed to determine the presence of antibiotic resistance genes (ARGs), genetic relatedness, and virulence factors known to cause diseases in humans. Whole-genome sequencing was conducted on 28 isolates using an Illumina NextSeq 500 sequencing platform. Read More

View Article and Full-Text PDF

Imaging of Allografted Glial-Restricted Progenitor Cell Survival and Hydrogel Scaffold Biodegradation.

ACS Appl Mater Interfaces 2021 May 12. Epub 2021 May 12.

The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States.

Transplanted glial-restricted progenitor (GRP) cells have potential to focally replace defunct astrocytes and produce remyelinating oligodendrocytes to avert neuronal death and dysfunction. However, most central nervous system cell therapeutic paradigms are hampered by high initial cell death and a host anti-graft immune response. We show here that composite hyaluronic acid-based hydrogels of tunable mechanical strengths can significantly improve transplanted GRP survival and differentiation. Read More

View Article and Full-Text PDF

Effectively Promoting Activity and Stability of a MnCoO-Based Cathode by Constructed Heterointerfaces for Solid Oxide Fuel Cells.

ACS Appl Mater Interfaces 2021 May 12. Epub 2021 May 12.

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.

The development of multiphase composite electrocatalysts plays a key role in achieving the efficient and durable operation of intermediate-temperature solid oxide fuel cells (IT-SOFCs). Herein, a self-assembled nanocomposite is developed as the oxygen reduction reaction (ORR) catalyst for IT-SOFCs through a coprecipitation method. The nanocomposite is composed of a doped (MnMg)ScCoO (MMSCO) spinel oxide (84 wt %), an orthorhombic perovskite phase (11. Read More

View Article and Full-Text PDF

Thirty-day outcomes in frail older patients discharged home from the emergency department with acute heart failure: effects of high-risk criteria identified by the DEED FRAIL-AHF trial.

Emergencias 2021 Jun;33(3):165-173

Área de Urgencias, Hospital Clínic, Barcelona, Grupo de Investigación "Urgencias: Procesos y Patologías", IDIBAPS, Barcelona, España.

Objectives: To study the effect of high-risk criteria on 30-day outcomes in frail older patients with acute heart failure (AHF) discharged from an emergency department (ED) or an ED's observation and short-stay areas.

Material And Methods: Secondary analysis of discharge records in the Older AHF Key Data registry. We selected frail patients (aged > 70 years) discharged with AHF from EDs. Read More

View Article and Full-Text PDF

Electrochemically Induced Phase Transition in V O  · H O Nanobelts/Reduced Graphene Oxide Composites for Aqueous Zinc-Ion Batteries.

Small 2021 May 12:e2100558. Epub 2021 May 12.

Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark.

V O ·H O nanobelts/reduced graphene oxide (rGO) composites (weight ratio: 86%/14%) are synthesized by a microwave approach with a high yield (85%) through controlling pH with acids. The growth mechanisms of the highly crystalline nanobelts (average diameter: 25 nm; length: ≈20 µm; oriented along the [101] direction) have been thoroughly investigated, with the governing role of the acid upon the morphology and oxidation state of vanadium disclosed. When used as the ZIB cathode, the composite can deliver a high specific capacity of 410. Read More

View Article and Full-Text PDF

Prevalence and severity of coronary artery disease linked to prognosis in psoriasis and psoriatic arthritis patients: A multi-centre cohort study.

J Intern Med 2021 May 12. Epub 2021 May 12.

Department of Cardiology, Gødstrup Hospital, Herning, Denmark.

Objectives: 1) To estimate the prevalence and severity of coronary artery disease and 2) to assess the risk of cardiovascular events and mortality, in patients with psoriasis and psoriatic arthritis (PsA) in a large-scale cohort of patients referred to coronary computed tomography angiography (CTA).

Methods: This was a cross-sectional study with follow-up of 46,022 patients based on data from a Danish national CTA registry. Exposures was defined as psoriasis or PsA. Read More

View Article and Full-Text PDF

Citicoline and Memory Function in Healthy Older Adults: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial.

J Nutr 2021 May 12. Epub 2021 May 12.

Research & Innovation Center, Kyowa Hakko Bio Co., Ltd, Tsukuba, Ibaraki, 305-0841, Japan.

Background: Supplementation of citicoline (CDP-choline), a naturally occurring mononucleotide, has shown beneficial effects on memory function and behavior in populations with a wide range of impairments. However, few studies have investigated its effect in healthy older populations.

Objective: The objective of this study was to investigate the effects of citicoline (Cognizin®), on memory in healthy elderly populations with age-associated memory impairment (AAMI). Read More

View Article and Full-Text PDF

Positive correlation between Candida auris skin-colonization burden and environmental contamination at a ventilator-capable skilled nursing facility in Chicago.

Clin Infect Dis 2021 May 12. Epub 2021 May 12.

Mycotic Diseases Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA.

Background: Candida auris is an emerging multidrug-resistant yeast that contaminates healthcare environments causing healthcare-associated outbreaks. The mechanisms facilitating contamination are not established.

Methods: C. Read More

View Article and Full-Text PDF

Hydrogen-bond-driven dimers of naphthyridine derivatives for selective identification of DNA G-quadruplexes.

Org Biomol Chem 2021 May 12. Epub 2021 May 12.

Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.

G-quadruplex (GQ) ligands as potential anti-cancer drugs have received extensive attention. Large aromatic systems are usually considered in the design of the ligands to improve the binding with GQs, which are typically constructed by the combination of small modules with covalent bonds. In this study, we presented a non-covalent bond approach to construct GQ ligands with an extended planar structure. Read More

View Article and Full-Text PDF

Constructing a nitrogen-doped carbon and nickel composite derived from a mixed ligand nickel-based a metal-organic framework toward adjustable microwave absorption.

Nanoscale 2021 May 12. Epub 2021 May 12.

Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.

The rational design of nanostructures for absorbers has great potential in the microwave absorption field. In this work, a mixed ligand nickel metal-organic framework (ML-Ni MOF) was first prepared by the self-assembly of pyrazine and 1,3,5-benzenetricarboxylic acid with nickel ions. Then, the as-prepared ML-Ni MOF was used as a precursor to fabricate a nitrogen-doped carbon and nickel composite (ML-Ni/C). Read More

View Article and Full-Text PDF

Quinizarin: a large aromatic molecule well suited for atomic layer deposition.

Dalton Trans 2021 May 12. Epub 2021 May 12.

Department of Chemistry, University of Oslo, Oslo, Norway.

Atomic layer deposition (ALD) is a remarkable synthesis tool due to the vast array of materials that can be deposited and the complexity of structures that can be designed. The low-temperature layer-by-layer approach even allows organic and inorganic components to be combined as hybrid or composite materials. The technique is then called molecular layer deposition (MLD). Read More

View Article and Full-Text PDF

Structural and proton conductivity studies of fibrous π-TiO(PO)·2HO: application in chitosan-based composite membranes.

Dalton Trans 2021 May 11. Epub 2021 May 11.

Department of Physical and Analytical Chemistry, University of Oviedo - CINN (CSIC), 33006, Oviedo, Spain.

Although the fibrous polymorphic modification of titanium phosphate, π-Ti2O(PO4)2·2H2O (π-TiP) has been known for decades, its crystal structure has remained unsolved. Herewith, we report the crystal structure of π-TiP at room temperature, as determined from synchrotron radiation powder X-ray diffraction, and corroborated by 31P solid state NMR and accurate density functional theory calculations. In contrast to the previously reported ρ-TiP polymorph, the as-synthesized hydrated phase crystallizes in the monoclinic system (P21/c, a = 5. Read More

View Article and Full-Text PDF

A study on optical and thermal properties of natural polymer-based hemicellulose compounds.

J Biomater Sci Polym Ed 2021 May 12:1-14. Epub 2021 May 12.

Department of Chemistry, Forman Christian College, A Chartered University Lahore Pakistan.

Films of husks of were prepared, delignified without protein and cellulose content, and their optical properties were evaluated. UV-Vis, FTIR TGA analysis revealed that these natural materials have strong potential in fiber optics, contact lenses and human transplantation infrastructure applications, where there is need of efficient transparency, high thermal stability and good conductivity with minimum light absorption. These natural polymeric films possess significant direct and indirect optical band gap values and better optical conductivity than currently in use synthetic polymeric materials. Read More

View Article and Full-Text PDF

Anifrolumab reduces flare rates in patients with moderate to severe systemic lupus erythematosus.

Lupus 2021 May 12:9612033211014267. Epub 2021 May 12.

BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, USA.

Background: Systemic lupus erythematosus (SLE) management objectives include preventing disease flares while minimizing glucocorticoid exposure. Pooled data from the phase 3 TULIP-1 and TULIP-2 trials in patients with moderate to severe SLE were analyzed to determine anifrolumab's effect on flares, including those arising with glucocorticoid taper.

Methods: TULIP-1 and TULIP-2 were randomized, placebo-controlled, 52-week trials of intravenous anifrolumab (300 mg every 4 weeks for 48 weeks). Read More

View Article and Full-Text PDF

Toward Efficient Synthesis of Porous All-Carbon-Based Nanocomposites for Enantiospecific Separation.

ACS Appl Mater Interfaces 2021 May 12. Epub 2021 May 12.

Department of Colloid Chemistry, Max-Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.

Chiral separation and asymmetric synthesis and catalysis are crucial processes for obtaining enantiopure compounds, which are especially important in the pharmaceutical industry. The efficiency of the separation processes is readily increased by using porous materials as the active material can interact with a larger surface area. Silica, metal-organic frameworks, or chiral polymers are versatile porous materials that are established in chiral applications, but their instability under certain conditions in some cases requires the use of more stable porous materials such as carbons. Read More

View Article and Full-Text PDF