3,699 results match your criteria material opening


Evaluation of the participation of hyaluronic acid with platelet-rich plasma in the treatment of temporomandibular joint disorders.

Dent Med Probl 2021 Jan-Mar;58(1):81-88

Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Damascus University, Syria.

Background: Temporomandibular joint disorders (TMDs) are widely researched diseases in medical literature. They are associated with many symptoms, such as pain, limited mouth opening and joint sounds, resulting in decreased quality of life for the patient. Both the hyaluronic acid (HA) injection and the plateletrich plasma (PRP) injection have a remarkable efficacy in the treatment of TMDs. Read More

View Article and Full-Text PDF

Rehabilitation in the treatment of mandibular condyle fractures.

Dent Med Probl 2021 Jan-Mar;58(1):89-96

Department of Maxillofacial Surgery, Pomeranian Medical University of Szczecin, Poland.

Background: The objective of rehabilitation after the treatment of a mandibular condyle fracture is to retrieve the effortless, symmetrical opening of the jaws with the preservation of appropriate movements to the sides, and appropriate occlusion without a sense of tension in the mastication muscles or pain sensations.

Objectives: The aim of the article was to establish the conditions of the rehabilitation of temporomandibular joint (TMJ) after the surgical treatment of a fractured condyle.

Material And Methods: The research featured 46 of patients treated surgically between January 2, 2017 and December 30, 2017. Read More

View Article and Full-Text PDF

Do patient-reported outcome measures correlate with clinical follow-up after arthroscopic treatment of internal derangement of the temporomandibular joint?

J Stomatol Oral Maxillofac Surg 2021 Apr 9. Epub 2021 Apr 9.

Senior resident, Department of Oral & Maxillofacial Surgery, the University Hospital of Skåne, 22185 Lund, Sweden. Electronic address:

Introduction: Arthroscopic treatment of the temporomandibular joint (TMJ) has traditionally been evaluated with clinical measurements. Additional recordings of patient reported outcome measures (PROM) is expected to make the evaluation more complete. The aim of the study was to evaluate if PROM correlates with clinical follow-up measures after arthroscopic treatment of internal derangement of the TMJ. Read More

View Article and Full-Text PDF

Phononic Crystals Applied to Localised Surface Haptics.

IEEE Trans Haptics 2021 Apr 12;PP. Epub 2021 Apr 12.

Metamaterials are solid lattices with periodicitiescommensurate with desired wavelengths. Their geometric fea-tures can endow the bulk material with unusual properties suchas, inter alia, negative indices of refraction or unique absorbingqualities. Mesoscale metamaterials can be designed to causethe occurence of phononic crystals in the ultrasonic domain. Read More

View Article and Full-Text PDF

Comparison of the effects of tens stimulation and water immersion on relieving labour pain suffered byprimiparas.

Ginekol Pol 2021 Apr 12. Epub 2021 Apr 12.

Department of Pharmacology and Toxicology, University of Zielona Gora, Collegium Medicum, Poland.

Objectives: The aim of this study was to compare pain suffered by primiparas when delivering a child in a traditional way with deliveries where either TENS stimulation or water immersion was used.

Material And Methods: Primiparas were divided into 3 groups. In group 1 there were 45 women for whom TENS stimulation was applied during delivery. Read More

View Article and Full-Text PDF

Seven Years-Experience of adalimumab therapy for hidradenitis suppurativa in a real-life dermatologic setting.

J Dermatolog Treat 2021 Apr 12:1-10. Epub 2021 Apr 12.

Department of Medical Sciences, Section of Dermatology and Infectious Diseases, University of Ferrara, Ferrara, Italy.

Introduction: Hidradenitis Suppurativa (HS) often causes severe impairment of the quality of life of patients affected, as it is characterized by recurrent relapses of inflammation and predisposes to retractive scars, with severe alteration of anatomy of the affected regions. Adalimumab is currently the only approved long-term biological therapy for this disease.

Material And Method: we retrospectively review the data of HS patients treated with Adalimumab at the "Hidradenitis Suppurativa Clinic", University of Ferrara, Italy since the drug was first available to October 2020. Read More

View Article and Full-Text PDF

A comparative study of desflurane versus sevoflurane in obese patients: Effect on recovery profile.

J Anaesthesiol Clin Pharmacol 2020 Oct-Dec;36(4):541-545. Epub 2021 Jan 18.

Department of Medicine, Dayanand Medical College and Hospital, Ludhiana, Punjab, India.

Background And Aims: Anesthesia in obese patients is difficult due to associated comorbidities and altered physiology. Desflurane and sevoflurane have a low fat-blood solubility coefficient and are better suited in these patients to achieve a rapid emergence. We studied BIS guided drug titration to compare the postoperative recovery characteristics and cognitive function of desflurane versus sevoflurane in obese patients undergoing laparoscopic abdominal surgeries. Read More

View Article and Full-Text PDF
January 2021

[Design and application of a mobile ultrasound guided puncture vehicle].

Authors:
Yan Xu Jun Xu

Zhonghua Wei Zhong Bing Ji Jiu Yi Xue 2021 Mar;33(3):357-359

Department of Emergency, the First Hospital of Jiaxing, Jiaxing 314001, Zhejiang, China. Corresponding author: Xu Jun, Email:

In daily medical work, it is common to carry out bedside ultrasound guided puncture surgery, which is easy to miss and inconvenient to operate when transporting medical devices. The department of emergency of the First Hospital of Jiaxing designed a kind of mobile ultrasound guided puncture vehicle, and obtained the National Utility Model Patent of China (ZL 2020 2 0100473.X). Read More

View Article and Full-Text PDF

Application of 2D Materials to Potassium-Ion Hybrid Capacitors.

ChemSusChem 2021 Apr 7. Epub 2021 Apr 7.

College of Medicine, Yan'an University, Yan'an, 716000, P. R. China.

Metal-ion hybrid supercapacitors (MICs) are a new type of electrochemical energy storage (EES) device, consisting of a battery-type electrode and a supercapacitor (SC)-type electrode. Exhibiting the advantages of both batteries and SCs (e. g. Read More

View Article and Full-Text PDF

Self-Assembly of Nanovoids in Si Microcrystals Epitaxially Grown on Deeply Patterned Substrates.

Cryst Growth Des 2020 May 8;20(5):2914-2920. Epub 2020 Apr 8.

L-NESS, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy.

We present an experimental and theoretical analysis of the formation of nanovoids within Si microcrystals epitaxially grown on Si patterned substrates. The growth conditions leading to the nucleation of nanovoids have been highlighted, and the roles played by the deposition rate, substrate temperature, and substrate pattern geometry are identified. By combining various scanning and transmission electron microscopy techniques, it has been possible to link the appearance pits of a few hundred nanometer width at the microcrystal surface with the formation of nanovoids within the crystal volume. Read More

View Article and Full-Text PDF

Plasmonic optical trapping of nanoparticles using T-shaped copper nanoantennas.

Opt Express 2021 Mar;29(7):9826-9835

We demonstrate the optical trapping of single dielectric nanoparticles in a microfluidic chamber using a coupled T-shaped copper plasmonic nanoantenna for studying light-matter interaction. The nanoantenna is composed of two identical copper elements separated by a 50 nm gap and each element is designed with two nanoblocks. Our nanoantenna inherits three different advantages compared to previous plasmonic nanoantennas, which are usually made of gold. Read More

View Article and Full-Text PDF

Effects of Remediation With Nanoscale Zero Valence Iron on the Physicochemical Conditions and Bacterial Communities of Groundwater Contaminated With Arsenic.

Front Microbiol 2021 17;12:643589. Epub 2021 Mar 17.

Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain.

Nanoscale Zero-Valent Iron (nZVI) is a cost-effective nanomaterial that is widely used to remove a broad range of metal(loid)s and organic contaminants from soil and groundwater. In some cases, this material alters the taxonomic and functional composition of the bacterial communities present in these matrices; however, there is no conclusive data that can be generalized to all scenarios. Here we studied the effect of nZVI application on groundwater from the site of an abandoned fertilizer factory in Asturias, Spain, mainly polluted with arsenic (As). Read More

View Article and Full-Text PDF

Enabling propagation of anisotropic polaritons along forbidden directions via a topological transition.

Sci Adv 2021 Apr 2;7(14). Epub 2021 Apr 2.

Department of Physics, University of Oviedo, Oviedo 33006, Spain.

Polaritons with directional in-plane propagation and ultralow losses in van der Waals (vdW) crystals promise unprecedented manipulation of light at the nanoscale. However, these polaritons present a crucial limitation: their directional propagation is intrinsically determined by the crystal structure of the host material, imposing forbidden directions of propagation. Here, we demonstrate that directional polaritons (in-plane hyperbolic phonon polaritons) in a vdW crystal (α-phase molybdenum trioxide) can be directed along forbidden directions by inducing an optical topological transition, which emerges when the slab is placed on a substrate with a given negative permittivity (4H-silicon carbide). Read More

View Article and Full-Text PDF

ZnO Nanosheet-Coated TiZrPdSiNb Alloy as a Piezoelectric Hybrid Material for Self-Stimulating Orthopedic Implants.

Biomedicines 2021 Mar 30;9(4). Epub 2021 Mar 30.

Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain.

A Ti-based alloy (TiZrPdSiNb) with already proven excellent mechanical and biocompatibility features has been coated with piezoelectric zinc oxide (ZnO) to induce the electrical self-stimulation of cells. ZnO was grown onto the pristine alloy in two different morphologies: a flat dense film and an array of nanosheets. The effect of the combined material on osteoblasts (electrically stimulable cells) was analyzed in terms of proliferation, cell adhesion, expression of differentiation markers and induction of calcium transients. Read More

View Article and Full-Text PDF

The Effect of the Oleophobicity Deterioration of a Membrane Surface on Its Rejection Capacity: A Computational Fluid Dynamics Study.

Membranes (Basel) 2021 Mar 31;11(4). Epub 2021 Mar 31.

Process System Engineering, University of Regina, Regina, SK S4S 0A2, Canada.

In this work, the effects of the deteriorating affinity-related properties of membranes due to leaching and erosion on their rejection capacity were studied via computational fluid dynamics (CFD). The function of affinity-enhancing agents is to modify the wettability state of the surface of a membrane for dispersed droplets. The wettability conditions can be identified by the contact angle a droplet makes with the surface of the membrane upon pinning. Read More

View Article and Full-Text PDF

Analytical Model of Two-Directional Cracking Shear-Friction Membrane for Finite Element Analysis of Reinforced Concrete.

Materials (Basel) 2021 Mar 17;14(6). Epub 2021 Mar 17.

Department of Engineering Technology, Materials Science, Engineering, and Commercialization Program, Texas State University, 601 University Drive, San Marcos, TX 78666, USA.

There are a multitude of existing material models for the finite element analysis of cracked reinforced concrete that provide reduced shear stiffness but do not limit shear strength. In addition, typical models are not based on the actual physical behavior of shear transfer across cracks by shear friction recognized in the ACI 318 Building Code. A shear-friction model was recently proposed that was able to capture the recognized cracked concrete behavior by limiting shear strength as a yielding function in the reinforcement across the crack. Read More

View Article and Full-Text PDF

Material Design for Optimal Postbuckling Behaviour of Composite Shells.

Materials (Basel) 2021 Mar 28;14(7). Epub 2021 Mar 28.

Dipartimento di Ingegneria Informatica, Modellistica, Elettronica e Sistemistica, University of Calabria, 87030 Rende, Italy.

Lightweight thin-walled structures are crucial for many engineering applications. Advanced manufacturing methods are enabling the realization of composite materials with spatially varying material properties. Variable angle tow fibre composites are a representative example, but also nanocomposites are opening new interesting possibilities. Read More

View Article and Full-Text PDF

Nickel-Catalyzed Asymmetric Reductive Carbo-Carboxylation of Alkenes with CO2.

Angew Chem Int Ed Engl 2021 Apr 1. Epub 2021 Apr 1.

Sichuan University, College of Chemistry, #29 Wangjiang Road, 610064, Chengdu, CHINA.

Reductive carboxylation of organo (pseudo)halides with CO 2 is a powerful method to provide carboxylic acids quickly. Notably, the catalytic reductive carbo-carboxylation of unsaturated hydrocarbons via CO 2 fixation is a highly challenging but desirable approach for structurally diverse carboxylic acids. However, there are only a few reports but no examples of alkenes via transition-metal catalysis. Read More

View Article and Full-Text PDF

Transcriptome analysis of the impact of exogenous methyl jasmonate on the opening of sorghum florets.

PLoS One 2021 31;16(3):e0248962. Epub 2021 Mar 31.

Yichun University, Jiangxi, Yichun, China.

Background: Methyl Jasmonate (MeJA) could promote the opening of sorghum florets, but the molecular mechanism remains unclear.

Objective: We aimed to investigate the molecular mechanism of exogenous MeJA in promoting the opening of sorghum florets.

Methods: Hybrid sorghum Aikang-8 was selected as the test material in this study. Read More

View Article and Full-Text PDF

In-vitro evaluation of microleakage of bioceramic root-end filling materials: A spectrophotometric study.

J Oral Biol Craniofac Res 2021 Apr-Jun;11(2):330-333. Epub 2021 Mar 10.

NMC Medical Centre, Dubai, United Arab Emirates.

Aim: To evaluate the microleakage of newer bioceramic root-end filling materials.

Material And Method: Sixty freshly extracted human single-rooted mandibular premolar teeth were selected for the study. Teeth with fractured root, cracks, anddilacerations were rejected. Read More

View Article and Full-Text PDF

Phononic metastructures with ultrawide low frequency three-dimensional bandgaps as broadband low frequency filter.

Authors:
Muhammad C W Lim

Sci Rep 2021 Mar 30;11(1):7137. Epub 2021 Mar 30.

City University of Hong Kong Shenzhen Research Institute, Shenzhen, People's Republic of China.

Vibration and noise control are among the classical engineering problems that still draw extensive research interest today. Multiple active and passive control techniques to resolve these problems have been reported, however, the challenges remain substantial. The recent surge of research activities on acoustic metamaterials for vibration and noise control are testimony to the fact that acoustic metamaterial is no longer limited to pure theoretical concepts. Read More

View Article and Full-Text PDF

Asymmetric Total Synthesis of Sarpagine and Koumine Alkaloids.

Angew Chem Int Ed Engl 2021 Mar 29. Epub 2021 Mar 29.

Chongqing University, School of Pharmaceutical Sciences, CHINA.

We report here a concise, collective, and asymmetric total synthesis of sarpagine alkaloids and biogenetically related koumine alkaloids, which structurally feature a rigid cage scaffold, with L-tryptophan as the starting material. Two key bridged skeleton-forming reactions, namely tandem sequential oxidative cyclopropanol ring-opening cyclization and ketone α-allenylation, ensure concurrent assembly of the caged sarpagine scaffold and installation of requisite derivative handles. With a common caged intermediate as the branch point, by taking advantage of ketone and allene groups therein, total synthesis of five sarpagine alkaloids (affinisine, normacusine B, trinervine, Na-methyl-16-epipericyclivine, and vellosimine) with various substituents and three koumine alkaloids (koumine, koumimine, and N-demethylkoumine) with more complex cage scaffolds has been accomplished. Read More

View Article and Full-Text PDF

Origin and distribution of facial nerve anatomy in van cats.

Anat Histol Embryol 2021 Mar 27. Epub 2021 Mar 27.

Institut fuer Anatomie, Histologie und Embryologie, Vetemeduni, Vienna, Austria.

This study aims to reveal the morphological properties of facial nerve and the middle ear in Van cats. Study material was composed of 6 female Van cats. Dissections were performed under a Zoom Stereo Microscope. Read More

View Article and Full-Text PDF

Broad-band plasmonic isolator compatible with low-gyrotropy magneto-optical material.

Opt Express 2021 Feb;29(3):4091-4104

Integration of optical isolators remains one the main technological issues of photonic circuits despite several decades of research. We propose a radically new concept which enables performing broad-band isolation even in the case of low-gyrotropy material, opening the road to a new class of non-reciprocal devices using easy-to-integrate composite materials. The principle explores the separation of back-and-forth light paths, induced by the coupled mode asymmetry in magnetoplasmonic slot waveguides. Read More

View Article and Full-Text PDF
February 2021

Female reproductive system and oogenesis in the mite Bakericheyla chanayi.

Arthropod Struct Dev 2021 Mar 23;62:101047. Epub 2021 Mar 23.

Zoological Institute, Russian Academy of Sciences, Saint-Petersburg, Russia. Electronic address:

The fine structure of the female reproductive system of a cheyletid mite Bakericheyla chanayi (Trombidiformes: Cheyletidae) is investigated for the first time. This system consists of an unpaired ovary, glandular oviduct, receptaculum seminis, long cuticle-lined vagina, and genital atrium terminating in the genital opening. A separate sperm access system has not been found. Read More

View Article and Full-Text PDF

Poly(4-ketovalerolactone) from Levulinic acid: Synthesis and Hydrolytic Degradation.

Macromolecules 2020 Jun 10;53(12):4952-4959. Epub 2020 Jun 10.

Department of Chemistry, 207 Pleasant Street, SE, University of Minnesota, Minneapolis, Minnesota 55455, United States.

We report here the synthesis of poly(4-ketovalerolactone) () via ring-opening transesterification polymerization (ROTEP) of the monomer 4-ketovalerolactone (, two steps from levulinic acid). The polymerization of proceeds to high equilibrium monomer conversion (up to 96% in the melt) to give the semicrystalline polyketoester with low dispersity. displays glass transition temperatures of 7 °C and two melting temperatures at 132 and 148 °C. Read More

View Article and Full-Text PDF

Grafting polysulfonamide from cellulose paper through organocatalytic ring-opening polymerization of N-sulfonyl aziridines.

Carbohydr Polym 2021 Jun 5;261:117903. Epub 2021 Mar 5.

Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia.

A facile and effective "grafting from" method by ROP of N-sulfonyl aziridines toward cellulose-g-polysulfonamides has been developed for efficient oil/water separation. The cellulose paper was initially succinylated to transform the hydroxyl to carboxyl acid groups, which act as the initiating sites for the ring-opening copolymerization of fluorescent 2-methyl-1-dansylaziridine and 2-methyl-1-tosylaziridine (TsMAz) towards the grafted cellulose. Both steps are catalyzed by the same compound, 7-methyl-1,5,7-triazabicyclo[4. Read More

View Article and Full-Text PDF

Post traumatic hydrocephalus in Indian subpopulation,an institutional experience.

Turk Neurosurg 2020 May 23. Epub 2020 May 23.

AIIMS,Patna.

Aim: Cerebrospinal fluid (CSF) diversion procedures have mixed results in PTH; therefore, it is pertinent to identify cases of PTH who will benefit from the procedure and search the factors responsible for it to minimize its occurrence.

Material And Methods: 500 cases included in this retrospective observational study were assigned to one of three groups: Group 1 had ventriculomegaly with periventricular lucency (PVL), and raised intracranial pressure (ICP) 2.1% (10/500). Read More

View Article and Full-Text PDF

[Violence in intimate partnerships and mental problems in children and adolescents].

Psychotherapeut (Berl) 2021 Mar 18:1-8. Epub 2021 Mar 18.

Klinik für Psychiatrie, Neurologie, Psychosomatik und Psychotherapie im Kindes- und Jugendalter, Universitätsmedizin Rostock, Rostock, Deutschland.

Background: The coronavirus disease 2019 (COVID-19) pandemic has changed the lives of families in an unprecedented way. During the first lockdown, extrafamilial contact was significantly reduced. Many parents had to look after their children and work from home while the economic pressure increased. Read More

View Article and Full-Text PDF