15,031 results match your criteria 400 materials


Synthesis of carbon nanotubes using pre-sintered oil fly ash via a reproducible process with large-scale potential.

Methods 2021 Sep 17. Epub 2021 Sep 17.

Department of Chemistry, Faculty of Applied Sciences, Taiz University, Taiz, Yemen.

Oil fly ash (OFA) is a byproduct generated by the burning of heavy crude oil in factories and power plants. Millions of tons of OFA is produced annually worldwide and is mostly treated as solid waste. Extensive efforts have been made to utilize OFA and reduce its environmental effects. Read More

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September 2021

Survival and success of tooth-implant-supported and solely implant-supported double-crown-retained overdentures: a prospective study over a period of up to 11 years.

Clin Oral Implants Res 2021 Sep 20. Epub 2021 Sep 20.

Dental School, Department of Prosthodontics, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.

Objectives: To investigate the long-term performance, over a period of up to 11 years, of tooth-implant-supported and solely implant-supported double-crown-retained overdentures (DCRDs) for complete restoration of the jaw.

Materials And Methods: Between 2002 and 2015, patients were consecutively enrolled in the study at Heidelberg University Hospital's Department of Prosthodontics. Scheduled and unscheduled visits were both documented on standardized forms. Read More

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September 2021

Multifunctional Two-Dimensional Metal-Organic Frameworks for Radionuclide Sequestration and Detection.

ACS Appl Mater Interfaces 2021 Sep 20. Epub 2021 Sep 20.

Pacific Northwest National Laboratory, Richland, Washington 99352, United States.

Two lanthanide-containing porous coordination polymers, [Ln(bpdc)(phen)]·HO () and [Ln(bpdc)(terpy)]·3HO () (Ln = Pr, Nd, or Sm-Dy; bpdc: 2,2'-bipyridine-5,5'-dicarboxylic acid; phen: 1,10-phenanthroline; and terpy: 2,2':6',2″-terpyridine), have been hydrothermally synthesized and structurally characterized by powder and single-crystal X-ray diffraction. Crystallographic analyses reveal that compounds and feature Ln-containing dimeric nodes that form a porous two-dimensional (2D) and nonporous three-dimensional (3D) framework, respectively. Each material is stable in aqueous media between pH 3 and 10 and exhibits modest thermal stability up to ∼400 °C. Read More

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September 2021

New solutions for combatting implant bacterial infection based on silver nano-dispersed and gallium incorporated phosphate bioactive glass sputtered films: A preliminary study.

Bioact Mater 2022 Feb 17;8:325-340. Epub 2021 Jun 17.

Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK.

Ag/Ga were incorporated into resorbable orthopaedic phosphate bioactive glasses (PBG, containing P, Ca, Mg, Na, and Fe) thin films to demonstrate their potential to limit growth of and in post-operative prosthetic implantation. Dual target consecutive co-sputtering was uniquely employed to produce a 46 nm Ag:PBG composite observed by high resolution TEM to consist of uniformly dispersed ~5 nm metallic Ag nano-particles in a glass matrix. Ga was integrated into a phosphate glass preform target which was magnetron sputtered to film thicknesses of ~400 or 1400 nm. Read More

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February 2022

EXPRESSION FEATURES OF HUMAN PAPILLOMA VIRUS TYPE 16 AND ANTI-EPSTEIN-BARR VIRUS IN PLEOMORPHIC ADENOMA, SURROUNDING AND INTACT SALIVARY GLAND.

Wiad Lek 2021 ;74(8):1789-1793

KHARKIV NATIONAL MEDICAL UNIVERSITY, KHARKIV, UKRAINE.

Objective: The aim is to reveal the expression features of MCA to human papilloma virus type 16 and anti-Epstein-Barr virus in the pleomorphic adenoma, surrounding and intact salivary gland.

Patients And Methods: Materials and methods: It was used surgical and biopsy material from 30 patients, represented by pleomorphic adenomas with surrounding to tumor tissue of the salivary gland and intact tissue of the salivary gland (the distance between the tumor and the intact salivary gland - 10 mm). Immunohistochemical study was performed using mouse monoclonal antibody (MCA) to human papilloma virus type 16 (clone CAMVIR-1, «Diagnostic BioSystems», USA) and anti-Epstein-Barr virus (LMP, clone CS. Read More

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January 2021

Biomechanical properties of the ex vivo porcine trachea: A benchmark for three-dimensional bioprinted airway replacements.

Am J Otolaryngol 2021 Sep 11;43(1):103217. Epub 2021 Sep 11.

The Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Health, Hempstead, NY, United States of America; Division of Pediatric Otolaryngology, Steven and Alexandra Cohen Children's Medical Center, New Hyde Park, NY, United States of America.

Purpose: Combining tissue engineering and three-dimensional (3D) printing may allow for the introduction of a living functional tracheal replacement graft. However, defining the biomechanical properties of the native trachea is a key prerequisite to clinical translation. To achieve this, we set out to define the rotation, axial stretch capacity, and positive intraluminal pressure capabilities for ex vivo porcine tracheas. Read More

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September 2021

Indentation-derived creep response of cast and laser powder bed fused AlSi10Mg alloy: Air temperature.

Micron 2021 Sep 14;150:103145. Epub 2021 Sep 14.

Micro/Nanomechanics Laboratory, Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH, USA. Electronic address:

Compared with time-consuming conventional uniaxial tensile/compressive creep experiments, depth-sensing indentation testing is considered a reliable, and convenient testing technique to assess the time-dependent plastic deformation of materials in a reasonable time scale. In the present study, we report the ambient (room) temperature indentation creep properties of additively manufactured (i.e. Read More

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September 2021

Use of non-contrast MR in diagnosing secondary lymphedema of the upper extremities.

Clin Imaging 2021 Sep 10;80:400-405. Epub 2021 Sep 10.

Beth Israel Deaconess Medical Center, Department of Radiology, 330 Brookline Ave., Boston, MA 02215, United States of America. Electronic address:

Purpose: The purpose of the study is to determine if a combination of dermal thickening and subcutaneous fluid honeycombing on non-contrast MRI, termed the dermal rim sign (DRS), can be diagnostically analogous to dermal backflow seen on lymphoscintigraphy in patients with secondary upper extremity lymphedema.

Materials And Methods: Upper extremity MRI and lymphoscintigraphy were performed on patients referred to a multidisciplinary lymphedema clinic for suspicion of secondary lymphedema. Sensitivity, specificity, and positive and negative predictive values of DRS on MRI in detecting dermal backflow on lymphoscintigraphy and the correlation between DRS, Indocyanine Green (ICG) lymphography, bioimpedence L-Dex® ratio and MRI Lymphedema Staging were calculated. Read More

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September 2021

Effect of silver nanoparticles on the antibacterial activity of Levofloxacin against methicillin-resistant Staphylococcus aureus.

Authors:
M J Saadh

Eur Rev Med Pharmacol Sci 2021 Sep;25(17):5507-5510

Faculty of Pharmacy, Middle East University, Amman, Jordan.

Objective: The paper presents the antibacterial activity of silver nanoparticles (AgNPs) when conjugated with Levofloxacin. The AgNPs used in this study were synthesized from silver nitrate using sodium borohydride as a reducing agent.

Materials And Methods: Levofloxacin activity was determined by minimum inhibitory concentrations (MICs) and also the erythrocyte hemolytic assay determined the capability of conjugation to cause hemolysis in human erythrocyte. Read More

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September 2021

Click-to-lead design of a picomolar ABA receptor antagonist with potent activity in vivo.

Proc Natl Acad Sci U S A 2021 Sep;118(38)

Institute for Integrative Genome Biology, University of California, Riverside, CA 92521;

Abscisic acid (ABA) is a key plant hormone that mediates both plant biotic and abiotic stress responses and many other developmental processes. ABA receptor antagonists are useful for dissecting and manipulating ABA's physiological roles in vivo. We set out to design antagonists that block receptor-PP2C interactions by modifying the agonist opabactin (OP), a synthetically accessible, high-affinity scaffold. Read More

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September 2021

A Combined Radiomics and Machine Learning Approach to Overcome the Clinicoradiologic Paradox in Multiple Sclerosis.

AJNR Am J Neuroradiol 2021 Sep 16. Epub 2021 Sep 16.

From the Departments of Advanced Biomedical Sciences (G.P., L.U., E.T., S.C.).

Background And Purpose: Conventional MR imaging explains only a fraction of the clinical outcome variance in multiple sclerosis. We aimed to evaluate machine learning models for disability prediction on the basis of radiomic, volumetric, and connectivity features derived from routine brain MR images.

Materials And Methods: In this retrospective cross-sectional study, 3T brain MR imaging studies of patients with multiple sclerosis, including 3D T1-weighted and T2-weighted FLAIR sequences, were selected from 2 institutions. Read More

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September 2021

Assessment of rituximab-abbs, a biosimilar, and rituximab outcomes in patients with CLL or NHL: A real-world UK study.

Leuk Res 2021 Jul 21;111:106671. Epub 2021 Jul 21.

Teva Pharmaceuticals Inc., 400 Interpace Pkwy #3, Parsippany, NJ, 07054, USA. Electronic address:

Background: Rituximab (chimeric anti-CD20 monoclonal antibody) treatment is approved for chronic lymphocytic leukemia (CLL) and non-Hodgkin lymphoma (NHL). Rituximab-abbs (first biosimilar approved in 2017) is expected to significantly reduce healthcare economic burden due to lower acquisition costs. This non-interventional, non-comparative study assessed real-world effectiveness and tolerability of rituximab-abbs and rituximab in treatment-naive patients with CLL or NHL. Read More

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Electrochemically controlled conversion of CO to defective carbon nanotubes for enhanced HO production.

Nanoscale 2021 Sep 16. Epub 2021 Sep 16.

State Key Laboratory of Materials Processing and Die & Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P.R. China.

Defects on carbon nanotubes (CNTs) can be used as active sites to promote the occurrence of catalytic reactions and improve the ability of catalysts. Although some progress has been made in the synthesis of defects on carbon nanotubes (CNTs), most of the defects are caused by acid etching or high-temperature pyrolysis of organics, which is detrimental to the environment, and the defects are uncontrollable. Herein, we report the eco-friendly and controllable synthesis of defective CNTs by reduction of CO under cathodic polarization in LiCO-based molten salts. Read More

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September 2021

Cost-minimization analysis of biweekly dosing of cetuximab and FOLFIRI compared with panitumumab and FOLFOX for first-line treatment of patients with KRAS wild type metastatic colorectal cancer in the United States.

J Med Econ 2021 Sep 16. Epub 2021 Sep 16.

Eli Lilly and Company, Indianapolis, IN, United States.

Aim: To compare the cost of biweekly regimens of first-line (1L) treatments of cetuximab-FOLFIRI versus panitumumab-FOLFOX in patients with Kirsten's rat sarcoma wild type (KRAS WT) metastatic colorectal cancer (mCRC) in the US, across varying weights and body surface areas (BSAs).

Materials And Methods: Cost-minimization analysis (CMA) was performed to estimate per-patient cost differences of cetuximab-FOLFIRI versus panitumumab-FOLFOX. The CMA estimated the costs of rat sarcoma (RAS) testing, premedication, drug acquisition, treating infusion reactions (IRs), supportive therapy, and biweekly administration of chemotherapy, cetuximab (500 mg/m), and panitumumab (6 mg/kg) over 43 weeks (median progression-free survival). Read More

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September 2021

Universal fluctuation of polygonal crack geometry in solidified lava.

Phys Rev E 2021 Aug;104(2-2):025009

Department of Environmental Sciences, University of Yamanashi, 4-4-37, Takeda, Kofu, Yamanashi 400-8510, Japan.

Outcrops of columnar joints made of solidified lava flows are often covered by semiordered polygonal cracks. The polygon diameters are fairly uniform at each outcrop, but their shapes largely vary in the number of sides and internal angles. Herein, we unveil that the statistical variation in the polygon shape follows an extreme value distribution class: the Gumbel distribution. Read More

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Nanoporous bismuth for the electrocatalytic reduction of CO to formate.

Phys Chem Chem Phys 2021 Sep 15;23(35):19195-19201. Epub 2021 Sep 15.

College of Chemistry and Molecular Sciences, Hubei key laboratory of Electrochemical powder sources, Wuhan university, Wuhan, 430072, P. R. China.

Bi is an attractive catalyst towards the electrochemical reduction of CO to formate. In this work, nanoporous bismuth was prepared by dealloying MgBi with tartaric acid (TA) solution, and the size of the primary Bi nanoparticles was adjusted according to the concentration of TA. When the concentration of TA increased from 2 wt% to 20 wt%, the particle size of Bi increased from about 70 nm to 400 nm. Read More

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September 2021

High and Anomalous Thermal Conductivity in Monolayer MSiZ Semiconductors.

ACS Appl Mater Interfaces 2021 Sep 15. Epub 2021 Sep 15.

State Key Lab of Mechanics and Control of Mechanical Structures & Key Lab for Intelligent Nano Materials and Devices of Ministry of Education & Institute for Frontier Science &Institute of Nanoscience & College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 210016, China.

The lattice thermal conductivity (κ) of a newly synthesized two-dimensional (2D) MoSiN family and its associated abnormality are anatomized by phonon Boltzmann transport calculations. κ of MoSiN and WSiN is found to be over 400 W m K at 300 K. κ of MoSiZ (Z = N, P, As) obeys Slack's rule of thumb, decreasing by 1 order of magnitude from Z = N to Z = As with 46 W m K. Read More

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September 2021

Analysis of robustness of the landmark Cardiovascular outcome trials of antidiabetic drugs - A systematic review.

Curr Diabetes Rev 2021 Sep 13. Epub 2021 Sep 13.

Department of Clinical Pharmacology, Seth GS Medical College & KEM Hospital, Parel-400 012, Mumbai, Maharashtra. India.

Background: It is essential for Randomized controlled trials [RCTs] to report its results in a comprehensive manner. Hence, it is necessary to assess the robustness of the trials with statistically significant and as well as non-significant results. Robustness can be evaluated using fragility index (FI) and reverse fragility index [RFI] is for trials with statistically significant and as well as non-significant results. Read More

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September 2021

Protective effects of Lepidium draba L. leaves extract on testis histopathology, oxidative stress indicators, serum reproductive hormones and inflammatory signalling in oxymetholone-treated rat.

Andrologia 2021 Sep 14:e14239. Epub 2021 Sep 14.

College of Life Sciences and Food Engineering, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, China.

This study was aimed to investigate the protective effects of Lepidium draba L. (L. draba) extract on oxymetholone (OM)-induced testicular injury in rat. Read More

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September 2021

Silicon Heterojunction Microcells.

ACS Appl Mater Interfaces 2021 Sep 14. Epub 2021 Sep 14.

Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.

We report the design, fabrication, and characterization of silicon heterojunction microcells, a new type of photovoltaic cell that leverages high-efficiency bulk wafers in a microscale form factor, while also addressing the challenge of passivating microcell sidewalls to mitigate carrier recombination. We present synthesis methods exploiting either dry etching or laser cutting to realize microcells with native oxide-based edge passivation. Measured microcell performance for both fabrication processes is compared to that in simulations. Read More

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September 2021

Cationic peptide-based salt-responsive antibacterial hydrogel dressings for wound healing.

Int J Biol Macromol 2021 Sep 10;190:754-762. Epub 2021 Sep 10.

College of Materials Science& Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China. Electronic address:

Development of biological dressings has received widespread attentions due to their good breathability, biocompatibility, wettability, and the ability to absorb wound exudate without sticking to the wound. However, current proposed antibacterial hydrogels are limited antibacterial ability, short service life and insufficient biocompatibility, which are still challenging to address intricate practical applications. Here we develop a cationic peptide-based, salt-responsive hydrogel dressing with triple functions of antifouling, bactericidal, and bacterial release by combining ε-poly-l-lysine, poly(ethylene glycol) diglycidyl ether, and poly(DVBAPS-co-GMA) via a one-pot method. Read More

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September 2021

Effect of Selenium and Vitamin E on the Level of Sperm HSPA2+, Intracellular Superoxide Anion and Chromatin Integrity in Idiopathic Asthenoteratozoospermia: A Double-Blind, Randomized, Placebo- Controlled Trial.

Urol J 2021 Sep 13. Epub 2021 Sep 13.

Student Research Committee, Iran University of Medical Sciences, Tehran, Iran.

Purpose: Male infertility accounts for about half of all infertility cases. Asthenoteratozoospermia is a severe form of male infertility. Free radicals play an important role in infertility. Read More

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September 2021

Increased Excited State Metallicity in Neutral CrO Clusters ( < 5) upon Sequential Oxidation.

J Am Chem Soc 2021 Sep 13. Epub 2021 Sep 13.

School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States.

Excited state lifetimes of neutral CrO ( < 5) clusters were measured using femtosecond pump-probe spectroscopy. Density functional theory calculations reveal that the excited state dynamics are correlated with changes in the cluster's electronic structure with increasing oxidation. Upon absorption of a UV (400 nm) photon, the clusters exhibit features attributed to three separate relaxation processes. Read More

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September 2021

Miniaturized VIS-NIR Spectrometers Based on Narrowband and Tunable Transmission Cavity Organic Photodetectors with Ultrahigh Specific Detectivity above 10 Jones.

Adv Mater 2021 Sep 13:e2102967. Epub 2021 Sep 13.

Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Str. 61, 01187, Dresden, Germany.

Spectroscopic photodetection plays a key role in many emerging applications such as context-aware optical sensing, wearable biometric monitoring, and biomedical imaging. Photodetectors based on organic semiconductors open many new possibilities in this field. However, ease of processing, tailorable optoelectronic properties, and sensitivity for faint light are still significant challenges. Read More

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September 2021

Effect of adhesive application method on repair bond strength of composite.

Restor Dent Endod 2021 Aug 4;46(3):e32. Epub 2021 Jun 4.

Department of Conservative Dentistry, Graduate School, Dankook University College of Dentistry, Cheonan, Korea.

Objectives: This study aimed to evaluate the effect of the application method of universal adhesives on the shear bond strength (SBS) of repaired composites, applied with different thicknesses.

Materials And Methods: The 84 specimens (Filtek Z350 XT) were prepared, stored in distilled water for a week and thermocycled (5,000 cycles, 5°C to 55°C). They were roughened using 400-grit sandpapers and etched with phosphoric acid. Read More

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Biocompatibility and Osseointegration of Calcium Phosphate-Coated and Non-Coated Titanium Implants with Various Porosities.

Sovrem Tekhnologii Med 2021 1;13(2):52-57. Epub 2021 Jan 1.

Researcher, Laboratory for Plasma Hybrid Systems, National Research Tomsk Polytechnic University, 30 Prospect Lenina, Tomsk, 634050, Russia.

was to study the influence of pore size and the presence of a biologically active calcium phosphate coating in porous 3D printed titanium implants on the process of integration with the bone tissue.

Materials And Methods: Samples of cylindrical implants with three different pore diameters (100, 200, and 400 μm) were fabricated from titanium powder on the Arcam 3D printer (Sweden) using electron beam melting technology. A calcium phosphate coating with a thickness of 20±4 μm was applied to some of the products by microarc oxidation. Read More

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January 2021

Atomistic theory of thermally activated magnetization processes in NdFeB permanent magnet.

Sci Technol Adv Mater 2021 6;22(1):658-682. Epub 2021 Sep 6.

Department of Applied Physics, Tohoku University, Sendai, Japan.

To study the temperature dependence of magnetic properties of permanent magnets, methods of treating the thermal fluctuation causing the thermal activation phenomena must be established. To study finite-temperature properties quantitatively, we need atomistic energy information to calculate the canonical distribution. In the present review, we report our recent studies on the thermal properties of the NdFeB magnet and the methods of studying them. Read More

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September 2021

Sensitive, High-Speed, and Broadband Perovskite Photodetectors with Built-In TiO Metalenses.

Small 2021 Sep 12:e2102694. Epub 2021 Sep 12.

Laboratory for Advanced Interfacial Materials and Devices, Research Centre for Smart Wearable Technology, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR, China.

Monolithic integration of nanostructured metalenses with broadband light transmission and good charge transport can simultaneously enhance the sensitivity, speed, and efficiency of photodetectors. The realization of built-in broadband metalenses in perovskite photodetectors, however, has been largely challenged by the limited choice of materials and the difficulty in nanofabrication. Here a new type of broadband-transmitting built-in TiO metalens (meta-TiO ) is devised, which is readily fabricated by one-step and lithograph-free glancing angle deposition. Read More

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September 2021

Crack Suppression in Conductive Film by Amyloid-Like Protein Aggregation toward Flexible Device.

Adv Mater 2021 Sep 12:e2104187. Epub 2021 Sep 12.

Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China.

A fatal weakness in flexible electronics is the mechanical fracture that occurs during repetitive fatigue deformation; thus, controlling the crack development of the conductive layer is of prime importance and has remained a great challenge until now. Herein, this issue is tackled by utilizing an amyloid/polysaccharide molecular composite as an interfacial binder. Sodium alginate (SA) can take part in amyloid-like aggregation of the lysozyme, leading to the facile synthesis of a 2D protein/saccharide hybrid nanofilm over an ultralarge area (e. Read More

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September 2021

Inductively Coupled Intraoral Flexible Coil for Increased Visibility of Dental Root Canals in Magnetic Resonance Imaging.

Invest Radiol 2021 Sep 9. Epub 2021 Sep 9.

From the Department of Radiology, Medical Physics Department of Oral and Craniomaxillofacial Surgery, Center for Dental Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg German Consortium for Translational Cancer Research Partner Site Freiburg, German Cancer Research Center (DKFZ), Heidelberg, Germany Minerva Imaging, Copenhagen, Denmark Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.

Objectives: Accurate visualization of dental root canals is vital for the correct diagnosis and subsequent treatment. This work assesses the improvement of a dedicated new coil for dental magnetic resonance imaging (MRI) in comparison to conventional ones in terms of signal-to-noise ratio (SNR) and visibility.

Materials And Methods: A newly developed intraoral flexible coil was used to display dental roots with MRI, and it provides improved sensitivity with a loop design and size adjusted to a single tooth anatomy. Read More

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September 2021