36,778 results match your criteria tensile strength

Flexor tendon repair using a reinforced tubular, medicated electrospun construct.

J Orthop Res 2021 May 15. Epub 2021 May 15.

Ghent University Faculty of Veterinary Medicine, Surgery and Anaesthesiology of Domestic Animals, Merelbeke, BE.

A reinforced tubular, medicated electrospun construct was developed for deep flexor tendon repair. This construct combines mechanical strength with the release of anti-inflammatory and anti-adhesion drugs. In this study, the reinforced construct was evaluated using a rabbit model. Read More

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Micro-mechanical performance evaluation of expansive soil biotreated with indigenous bacteria using MICP method.

Sci Rep 2021 May 14;11(1):10324. Epub 2021 May 14.

Department of Civil Engineering, Indian Institute of Technology Indore, Indore, India.

This study explored the effect of indigenous bacteria present in the soil to stabilized swelling behavior and improving the mechanical property of expansive soil. The objective of the research is to investigate the effectiveness of the biostimulation microbial induced calcite precipitation (MICP) for controlling the swelling-shrinkage behavior and improving shear strength of expansive soil. An attempt was made to develop an effective procedure to culture the indigenous bacteria for treating clays with varying plasticity and improve their engineering behavior. Read More

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Texture and surface feature-mediated striking improvements on multiple direct compaction properties of Zingiberis Rhizoma extracted powder by coprocessing with nano-silica.

Int J Pharm 2021 May 11:120703. Epub 2021 May 11.

Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China.

The study aims to markedly improve direct compaction (DC) properties of Zingiberis Rhizoma extracted powder (ZR) by modifying its texture and surface properties with nano-silica (NS). A wet coprocessing method was applied to evenly distribute up to 33.3% NS to ZR. Read More

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Quaternary ammonium silane-reinforced agar/polyacrylamide composites for packaging applications.

Int J Biol Macromol 2021 May 11. Epub 2021 May 11.

Department of Fiber System Engineering, Yeungnam University, South Korea. Electronic address:

Agar/polyacrylamide/quaternary ammonium silane-based (A/P/QAS-based) composite films were developed for food and biomedical packaging applications. The structural, optical, and surface morphological properties of the A/P and A/P/QAS composites were characterized by various characterization techniques in terms of thermogravimetric analysis, differential scanning calorimetry analyses, mechanical and rheological properties. Results showed that the 5% gravimetric loss (57. Read More

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Effect of Exercise Intensity on the Healing of the Bone-Tendon Interface: A Mouse Rotator Cuff Injury Model Study.

Am J Sports Med 2021 May 14:3635465211011751. Epub 2021 May 14.

Department of Sports Medicine & Research Centre of Sports Medicine, Xiangya Hospital, Central South University, Changsha, China.

Background: Injuries at the bone-tendon interface (BTI) are common findings in clinical practice. Rehabilitation procedures after BTI surgery are important but are controversial.

Purpose: To investigate the effects of different exercise intensities on BTI healing by means of an established mouse rotator cuff injury model. Read More

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Molecular insights into the complex mechanics of plant epidermal cell walls.

Science 2021 May;372(6543):706-711

Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.

Plants have evolved complex nanofibril-based cell walls to meet diverse biological and physical constraints. How strength and extensibility emerge from the nanoscale-to-mesoscale organization of growing cell walls has long been unresolved. We sought to clarify the mechanical roles of cellulose and matrix polysaccharides by developing a coarse-grained model based on polymer physics that recapitulates aspects of assembly and tensile mechanics of epidermal cell walls. Read More

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Aging of PVDF and PES ultrafiltration membranes by sodium hypochlorite: Effect of solution pH.

J Environ Sci (China) 2021 Jun 5;104:444-455. Epub 2021 Jan 5.

Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address:

Sodium hypochlorite (NaClO) is a commonly applied cleaning agent for ultrafiltration membranes in water and wastewater treatment. Long-term exposure to NaClO might change the properties and performance of polymeric membranes, and ultimately shorten membrane lifespan. Active species in NaClO solution vary with solution pH, and the aging effects can change depending on the membrane material. Read More

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Fabrication of dual layered biocompatible herbal biopatch from biological waste for skin - tissue regenerative applications.

Int J Biol Macromol 2021 May 10;183:1106-1118. Epub 2021 May 10.

Department of Biomedical Engineering, K.P.R. Institute of Engineering and Technology, Coimbatore 641407, India.

A dual layered herbal biopolymeric patch (biopatch) with enhanced wound healing efficiency and skin mimicking functions was fabricated for skin-tissue regenerative applications. In this study, hoof keratin (KE) extracted from biological waste and gelatin (GE) was employed for KE-GE biosheet fabrication using a simple casting method. Further, the top layer of the fabricated KE-GE biosheet was coated with bioactive Matricaria recutita (Chamomile flower) extract (CH) with gelatin through an electrospraying method. Read More

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The Effect of Process Variables and Binder Concentration on Tabletability of Metformin Hydrochloride and Acetaminophen Granules Produced by Twin Screw Melt Granulation with Different Polymeric Binders.

AAPS PharmSciTech 2021 May 13;22(4):154. Epub 2021 May 13.

Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, 8000 Utopia Parkway, Queens, New York, 11439, USA.

In twin screw melt granulation, granules are produced by passing mixtures of drug substances and polymeric binders through twin screw extruder such that temperatures are maintained below melting point of drugs but above glass transition of polymers used, whereby the polymers coat surfaces of drug particles and cause their agglomeration into granules. Since various formulation factors, such as binder type and concentration, and processing variables like extrusion temperature, screw configuration, and screw speed, can influence the granulation process, the present investigation was undertaken to study their effects on tabletability of granules produced. Three different types of polymeric binders, Klucel® EXF (hydroxypropyl cellulose), Eudragit® EPO (polyacrylate binder), and Soluplus® (polyvinyl caprolactam-co-vinyl acetate-ethylene glycol graft polymer), were used at 2, 5, and 10% concentrations. Read More

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Novel two-dimensional tetrahexagonal boron nitride with a sizable band gap and a sign-tunable Poisson's ratio.

Nanoscale 2021 May 13. Epub 2021 May 13.

Computational Science Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea.

By performing first-principles calculations, a new two-dimensional (2D) boron nitride (th-BN) with perfectly ordered arrangements of tetragonal and hexagonal rings is predicted to be energetically, dynamically, thermally, and mechanically stable. The unique structure endows th-BN with anisotropic mechanical, electronic, and optical properties. Remarkably, th-BN exhibits exceptional mechanical properties such as high in-plane stiffness and sign-tunable Poisson's ratio (PR). Read More

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Electrospun heparin-loaded nano-fiber sutures for the amelioration of achilles tendon rupture regeneration: evaluation.

J Mater Chem B 2021 May 13. Epub 2021 May 13.

Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.

Peritendinous blood circulation improvement is a challenge to promote the healing of ruptured tendons in clinical treatment. Although electrospun membranes or scaffolds enable the reduction of complications such as adhesion, however, low efficiency, toxicity issues, the loss of biological activity, and complex electrospinning techniques are all bottlenecks of these systems. Improving the blood supply is crucial for their successful use, which involves promoting the metabolism and nutrient absorption in tendons. Read More

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Ballistic performance of Polycarbonate and Polymethyl methacrylate under normal and inclined dynamic impacts.

Heliyon 2021 Apr 21;7(4):e06856. Epub 2021 Apr 21.

Anglia Ruskin University, Engineering and the Built Environment, CM1 1SQ, Chelmsford, Essex, United Kingdom.

Polymeric materials have exceptional mechanical properties, making them attractive for automotive, aerospace, defence and buildings industries. The numerical analysis of translucent polymeric materials' ballistic performance is investigated to analyse the deflection and perforation performance at high impact velocities. Computational methods are exploited to predict the ballistic performance of thick targets and projectile damage, and the results are validated against published works. Read More

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Four-Strand Hamstring Diamond Braid Technique for Anterior Cruciate Ligament Reconstruction.

Arthrosc Tech 2021 Apr 22;10(4):e1173-e1177. Epub 2021 Mar 22.

Advanced Orthopaedics and Sports Medicine, San Francisco, California, U.S.A.

Several factors affect the success of an anterior cruciate ligament reconstruction, including graft origin, type, and morphology. Hamstring and bone-patellar tendon-bone autografts are the most widely used, and there are many different techniques of graft preparation with each. In this Technical Note and accompanying video, a 4-strand hamstring autograft technique is described that uses a simple diamond-type braid to produce a more ovoid morphology with increased cross-sectional area. Read More

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Fabrication of High Dielectric Materials Through Selective Insertion of Functionalized Reduced Graphene Oxide on Hard Segment of Thermoplastic Polyurethane.

J Nanosci Nanotechnol 2021 Nov;21(11):5569-5582

Department of Chemical Engineering, Khalifa University of Science and Technology (KUST), Sas Al Nakh! Campus, Abu Dhabi, P.O. 2533, United Arab Emirates.

The presence of microcapacitors near percolatrion threshold determines dielectric permittivity of a material. Motivated by this concept, we focused our work by preferentially allocating functionalized reduced graphene oxide (FRGO) in hard segment (disperse phase) of Thermoplastic polyurethane (TPU) by solution blending method and characterized. Morphological studies of TPU/FRGO nanocomposites established homogeneous dispersion of FRGO throughout the TPU matrix. Read More

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November 2021

A Modified Flexor Tendon Suture Technique Combining Kessler and Loop Lock Flexor Tendon Sutures.

Clinics (Sao Paulo) 2021 5;76:e2358. Epub 2021 May 5.

Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Shahekou district, Dalian, Liaoning, China.

Objectives: In the present study, a novel single knot tenorrhaphy was developed by combining the modified Kessler flexor tendon suture (MK) with the loop lock technique.

Methods: A total of 48 porcine flexor digitorum profundus tendons were collected and randomly divided into six groups. The tendons were transversely cut and then repaired using six different techniques, the MK method, double knot Kessler-loop lock flexor tendon suture (DK), and single knot Kessler-loop lock flexor tendon suture (SK), each in combination with the epitendinous suture (P), and the same three techniques without P. Read More

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Towards a rational design of materials for the removal of environmentally relevant cations: polymer inclusion membranes (PIMs) and surface-modified PIMs for Sn sequestration in aqueous solution.

Environ Sci Pollut Res Int 2021 May 11. Epub 2021 May 11.

Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy.

This work is focused on the design and preparation of polymer inclusion membranes (PIMs) for potential applications for stannous cation sequestration from water. For this purpose, the membranes have been synthesized employing two polymeric matrices, namely, polyvinylchloride (PVC) and cellulose triacetate (CTA), properly enriched with different plasticizers. The novelty here proposed relies on the modification of the cited PIMs by selected extractants expected to interact with the target cation in the membrane bulk or onto its surface, as well as in the evaluation of their performances in the sequestration of tin(II) in solution through chemometric tools. Read More

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Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT.

Sci Rep 2021 May 11;11(1):10020. Epub 2021 May 11.

Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.

Composite structures made of 2 mm-thick titanium and 10 mm-thick carbon steel are widely used in infrastructures such as long-distance gas transportation. However, cracking, which is caused by intermetallic compounds (ICs), is a dominate failure mode in welds of this structure. Thus, a common way to improve the in-service life of is reduce the number of ICs. Read More

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Structural performance of a climbing cactus: making the most of softness.

J R Soc Interface 2021 May 12;18(178):20210040. Epub 2021 May 12.

AMAP, Univ Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier, France.

Climbing plants must reach supports and navigate gaps to colonize trees. This requires a structural organization ensuring the rigidity of so-called 'searcher' stems. Cacti have succulent stems adapted for water storage in dry habitats. Read More

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Preparation and characterization of biodegradable trilayer films based on starch and polyester.

Int J Biol Macromol 2021 May 8;183:1058-1066. Epub 2021 May 8.

College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, China. Electronic address:

The trilayer films of polyester/starch/polyester with different starch/polyester layer thickness ratios were prepared by co-extrusion blowing. FTIR and SEM results showed the successful fabrication of trilayer films. The crystallinity of trilayer films gradually increased as the thickness of polyester layer increased. Read More

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Robust and double-layer micro-patterned bioadhesive based on silk nanofibril/GelMA-alginate for stroma tissue engineering.

Int J Biol Macromol 2021 May 8;183:1013-1025. Epub 2021 May 8.

Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran. Electronic address:

We develop a robust micro-patterned double-layer film that can adhere firmly to the tissue and provide a sustained release of ascorbic acid (AA) for corneal regeneration. This double-layer film consists of a AA reservoir sodium alginate (SA) adhesive and an anisotropic layer made of micro-patterned silk nanofibrils (SNF) incorporated gelatin methacrylate (GelMA) (S/G). The S/G layer facilitates the adhesion and orientation of corneal stroma cells, depending on the pattern sizes (50 μm (P1) and 100 (P2) μm). Read More

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Microstructure and Mechanical Properties of Zinc Matrix Biodegradable Composites Reinforced by Graphene.

Front Bioeng Biotechnol 2021 31;9:635338. Epub 2021 Mar 31.

College of Materials and Metallurgy, Guizhou University, Guiyang, China.

This work used spark plasma sintering (SPS) to prepare graphene nanosheets (GNS) reinforced zinc matrix composites. The influence of GNS on the microstructure and mechanical properties of zinc matrix composites was studied. The results show that the GNS/Zn composites prepared by SPS have a dense structure and good interface bonding, and GNS are uniformly distributed in the zinc matrix. Read More

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Transparent, conductive cellulose hydrogel for flexible sensor and triboelectric nanogenerator at subzero temperature.

Carbohydr Polym 2021 Aug 15;265:118078. Epub 2021 Apr 15.

College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China; Hubei Engineering Center of Natural Polymer-based Medical Materials, Wuhan University, Wuhan, 430072, China. Electronic address:

Herein, flexible, transparent and conductive cellulose hydrogels were directly fabricated by regenerating the chemically cross-linked cellulose in NaCl aqueous solution, without further treatment. NaCl played a dominant role on the mechanical, optical, conductive and anti-freezing properties of cellulose hydrogel, also endowed the hydrogel with safety. After optimization, the transparency, tensile strength, elongation at break and conductivity of the cellulose hydrogel reached 94 % at 550 nm, 5. Read More

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Investigation on the impact of different proportions of components in formulations on stability of a moisture sensitive drug.

Int J Pharm 2021 May 6:120690. Epub 2021 May 6.

GEA-NUS Pharmaceutical Processing Research Laboratory, Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore. Electronic address:

Physicochemical and mechanical properties of tablets are largely dictated by formulation compositions. Different excipients possess different tableting and moisture sorption behaviors. Therefore, this study was designed to elucidate the relative influence of the proportion of components in formulations on tablet properties. Read More

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Innovative production of lignin nanoparticles using deep eutectic solvents for multifunctional nanocomposites.

Int J Biol Macromol 2021 May 6;183:781-789. Epub 2021 May 6.

State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong 250353, China. Electronic address:

A green and simple lignin nanoparticles (LNPs) production strategy was developed using deep eutectic solvents (DES). The LNPs were formed with corncob alkali lignin by sequential DES dissolution and self-assembling process. Uniform size and spherical shape of LNPs were observed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), zeta potential analyzer and gel permeation chromatography (GPC). Read More

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