3,417 results match your criteria homogeneous component


Morphometrics of in the State of Veracruz, Mexico.

Pathogens 2021 Apr 29;10(5). Epub 2021 Apr 29.

USDA-ARS Knipling-Bushland U.S. Veterinary Pest Genomics Center and Livestock Insects Research Laboratory, Kerrville, TX 78028, USA.

The tick is an ectoparasite of veterinary and public health importance because of its role as a vector of zoonotic pathogens. However, little is known about intraspecific variability and if morphological differentiation exists between populations across its geographic range. This study aimed to determine by electron microscopy the morphological variability of populations in the state of Veracruz, which has a large livestock population among states in Mexico. Read More

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Are pain coping strategies and neuropathic pain associated with a worse outcome after conservative treatment for Achilles tendinopathy? A prospective cohort study.

J Sci Med Sport 2021 Apr 19. Epub 2021 Apr 19.

Department of Orthopaedic Surgery and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, The Netherlands.

Objectives: To analyse whether (1) passive or active pain coping strategies and (2) presence of neuropathic pain component influences the change of Achilles tendinopathy (AT) symptoms over a course of 24 weeks in conservatively-treated patients.

Design: Prospective cohort study.

Methods: Patients with clinically-diagnosed chronic midportion AT were conservatively treated. Read More

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New Preparation Methods for Pore Formation on Polysulfone Membranes.

Membranes (Basel) 2021 Apr 18;11(4). Epub 2021 Apr 18.

Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel.

This work described the preparation of membranes based on aromatic polysulfones through the phase-inversion method induced by a nonsolvent, generating the phase separation (NIPS) process. Three new techniques, including the nano iron acid etching method, base hydrolysis method of crosslinked polymers, and base hydrolysis method of a reactive component in a binary polymer blend, were developed for pore creation on membranes. The modified polymers and obtained membranes were carefully characterized. Read More

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Separation, characterization and hypoglycemic activity evaluation of a low molecular weight heteropolysaccharide from the fruiting body of .

Food Funct 2021 Apr;12(8):3493-3503

College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China.

Edible mushrooms have potential in anti-diabetic phytotherapy. They are rich in natural compounds such as polysaccharides, which have been known to have antihyperlipidemic effects since ancient times. A polysaccharide fraction of PP80 and a contained low molecular-weight (Mw), water-soluble polysaccharide (PPW-1, Mw: 3. Read More

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A Generalized Split-Step Angular Spectrum Method for Efficient Simulation of Wave Propagation in Heterogeneous Media.

Authors:
Can Baris Top

IEEE Trans Ultrason Ferroelectr Freq Control 2021 Apr 23;PP. Epub 2021 Apr 23.

Angular spectrum (AS) methods enable efficient calculation of wave propagation from one plane to another inside homogeneous media. For wave propagation in heterogeneous media such as biological tissues, AS methods cannot be applied directly. Split-stepping techniques decompose the heterogeneous domain into homogeneous and perturbation parts, and provide a solution for forward wave propagation by propagating the incident wave in both frequency-space and frequency-wavenumber domains. Read More

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Homogeneous water nucleation in carbon dioxide-nitrogen mixtures: Experimental study on pressure and carrier gas effects.

J Chem Phys 2021 Apr;154(15):154301

Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

New homogeneous nucleation experiments are presented at 240 K for water in carrier gas mixtures of nitrogen with carbon dioxide molar fractions of 5%, 15%, and 25%. The pulse expansion wave tube is used to test three different pressure conditions, namely, 0.1, 1, and 2 MPa. Read More

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Precisely tuning the electronic structure of a structurally ordered PtCoFe alloy a dual-component promoter strategy for oxygen reduction.

Chem Commun (Camb) 2021 Apr;57(33):4047-4050

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China.

Optimizing the electronic structure of Pt-based alloys has emerged as an effective strategy to further improve their catalytic oxygen reduction reaction (ORR) performance, yet this remains challenging. Here, we have successfully tuned the electronic structure of ordered PtCoFe nanoparticles by incorporating the third component (Fe) into a bimetallic ordered PtCo alloy and manipulating its content. With the merits of the optimum electronic structure and the favorable composition, as well as the robust ordered structure, the as-prepared ordered PtCoFe-1-0. Read More

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An ultra-high-affinity small organic ligand of fibroblast activation protein for tumor-targeting applications.

Proc Natl Acad Sci U S A 2021 Apr;118(16)

Philochem AG, R&D department, CH-8112 Otelfingen, Switzerland;

We describe the development of OncoFAP, an ultra-high-affinity ligand of fibroblast activation protein (FAP) for targeting applications with pan-tumoral potential. OncoFAP binds to human FAP with affinity in the subnanomolar concentration range and cross-reacts with the murine isoform of the protein. We generated various fluorescent and radiolabeled derivatives of OncoFAP in order to study biodistribution properties and tumor-targeting performance in preclinical models. Read More

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Amide proton transfer imaging for differentiation of tuberculomas from high-grade gliomas: Preliminary experience.

Neuroradiol J 2021 Apr 7:19714009211002766. Epub 2021 Apr 7.

Department of Neuropathology, National Institute of Mental Health and Neurosciences, India.

Purpose: Tuberculomas can occasionally masquerade as high-grade gliomas (HGG). Evidence from magnetisation transfer (MT) imaging suggests that there is lower protein content in the tuberculoma microenvironment. Building on the principles of chemical exchange saturation transfer and MT, amide proton transfer (APT) imaging generates tissue contrast as a function of the mobile amide protons in tissue's native peptides and intracellular proteins. Read More

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First report of causing root rot of taro ( ) and leatherleaf fern () in Brazil.

Plant Dis 2021 Apr 5. Epub 2021 Apr 5.

Universidade Federal de Vicosa, Departamento de Fitopatologia, Campus da UFV, Vicosa, Minas Gerais, Brazil, 36571-000;

Colocasia esculenta, taro (T), is a major staple food crop in the tropics, including Brazil. Rumohra adiantiformis, leatherhead fern (LF), is broadly cultivated for its ornamental fronds that are used as a component of flower arrangements. Soft root rot of T and LF, and accompanying rapid plant wilt and death, was observed in plantations in Espírito Santo (Brazil), at Venda Nova do Imigrante, in April 2014 (LF) and July 2015 (T). Read More

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Comparative Study of CoFeO Nanoparticles and CoFeO-Chitosan Composite for Congo Red and Methyl Orange Removal by Adsorption.

Nanomaterials (Basel) 2021 Mar 12;11(3). Epub 2021 Mar 12.

National Institute for Laser, Plasma and Radiation Physics, 077125 Măgurele, Romania.

(1) Background: A comparative research study to remove Congo Red (CR) and Methyl Orange (MO) from single and binary solutions by adsorption onto cobalt ferrite (CoFeO) and cobalt ferrite-chitosan composite (CoFeO-Chit) prepared by a simple coprecipitation method has been performed. (2) Methods: Structural, textural, morphology, and magnetic properties of the obtained magnetic materials were examined by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, N adsorption-desorption analysis, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and magnetic measurements. The optimal operating conditions of the CR and MO removal processes were established in batch experiments. Read More

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Multidimensional Comparative Analysis of Bioactive Phenolic Compounds of Honeys of Various Origin.

Antioxidants (Basel) 2021 Mar 29;10(4). Epub 2021 Mar 29.

Institute of Food Technology of Plant Origin, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, 60-637 Poznań, Poland.

Honey is a natural product which owes its health benefits to its numerous bioactive compounds. The composition of honey is highly diverse and depends on the type of honey and its origin. Antioxidant capacity arises mainly from the total content of polyphenols and their composition. Read More

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Polymer Membranes for All-Vanadium Redox Flow Batteries: A Review.

Membranes (Basel) 2021 Mar 18;11(3). Epub 2021 Mar 18.

Institute of Recycling, Ostfalia University of Applied Sciences, Robert-Koch-Platz 8a, 38440 Wolfsburg, Germany.

Redox flow batteries such as the all-vanadium redox flow battery (VRFB) are a technical solution for storing fluctuating renewable energies on a large scale. The optimization of cells regarding performance, cycle stability as well as cost reduction are the main areas of research which aim to enable more environmentally friendly energy conversion, especially for stationary applications. As a critical component of the electrochemical cell, the membrane influences battery performance, cycle stability, initial investment and maintenance costs. Read More

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Applicability of an Experimental Grade of Hydroxypropyl Methylcellulose Acetate Succinate as a Carrier for Formation of Solid Dispersion with Indomethacin.

Pharmaceutics 2021 Mar 8;13(3). Epub 2021 Mar 8.

Physical Chemistry, Laboratory for Medicinal Chemistry Research, Shionogi & Co., Ltd., Osaka 561-0825, Japan.

The transformation of a crystalline drug into an amorphous form is a promising way to enhance the oral bioavailability of poorly water-soluble drugs. Blending of a carrier, such as a hydrophilic polymer, with an amorphous drug is a widely used method to produce a solid dispersion and inhibit crystallization. This study investigates an experimental grade of hydroxypropyl methylcellulose acetate succinate, HPMCAS-MX (MX), as a solid dispersion carrier. Read More

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Chemical Interface Damping of Surface Plasmon Resonances.

Acc Chem Res 2021 Apr 31;54(8):1950-1960. Epub 2021 Mar 31.

ConspectusMetal nanoparticles have been utilized for a vast amount of plasmon enhanced spectroscopies and energy conversion devices. Their unique optical properties allow them to be used across the UV-vis-NIR spectrum tuned by their size, shape, and material. In addition to utility in enhanced spectroscopy and energy/charge transfer, the plasmon resonance of metal nanoparticles is sensitive to its surrounding environment in several ways. Read More

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Microbial Communities in Full-Scale Wastewater Treatment Systems Exhibit Deterministic Assembly Processes and Functional Dependency over Time.

Environ Sci Technol 2021 04 30;55(8):5312-5323. Epub 2021 Mar 30.

School of Energy and Environment, City University of Hong Kong, Hong Kong SAR, China.

Microbial communities constitute the core component of biological wastewater treatment processes. We conducted a meta-analysis based on the 16S rRNA gene of temporal samples obtained from diverse full-scale activated sludge and anaerobic digestion systems treating municipal and industrial wastewater (collected in this study and published previously) to investigate their community assembly mechanism and functional traits over time, which are not currently well understood. The influent composition was found to be the main driver of the microbial community's composition, and relatively large proportions of specialist (26. Read More

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Promoting photocatalytic CO reduction with a molecular copper purpurin chromophore.

Nat Commun 2021 03 23;12(1):1835. Epub 2021 Mar 23.

MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China.

CO reduction through artificial photosynthesis represents a prominent strategy toward the conversion of solar energy into fuels or useful chemical feedstocks. In such configuration, designing highly efficient chromophores comprising earth-abundant elements is essential for both light harvesting and electron transfer. Herein, we report that a copper purpurin complex bearing an additional redox-active center in natural organic chromophores is capable to shift the reduction potential 540 mV more negative than its organic dye component. Read More

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A homogeneous split-luciferase assay for rapid and sensitive detection of anti-SARS CoV-2 antibodies.

Nat Commun 2021 03 22;12(1):1806. Epub 2021 Mar 22.

Donnelly Centre, University of Toronto, Toronto, ON, Canada.

Better diagnostic tools are needed to combat the ongoing COVID-19 pandemic. Here, to meet this urgent demand, we report a homogeneous immunoassay to detect IgG antibodies against SARS-CoV-2. This serological assay, called SATiN, is based on a tri-part Nanoluciferase (tNLuc) approach, in which the spike protein of SARS-CoV-2 and protein G, fused respectively to two different tNLuc tags, are used as antibody probes. Read More

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Assessing the microscale heterogeneity in Standard Reference Material 4600 Surrogate Post-detonation Urban Debris.

Appl Radiat Isot 2021 Jun 23;172:109651. Epub 2021 Feb 23.

NIST, Radioactivity Group, Radiation Physics Division, Physical Measurement Laboratory, Building 245 Room C116, MS 8462, 100 Bureau Drive, Gaithersburg, MD, 20899, USA. Electronic address:

Nondestructive microbeam X-ray fluorescence (μXRF) spectrometry has been used to investigate the elemental microheterogeneity in a nuclear forensics reference material (RM), NIST SRM 4600 Surrogate Post-detonation Urban Debris. Using a principal component analysis (PCA) model, results indicate the majority of elements appear homogeneous; however, zinc (Zn) exhibits microscale heterogeneity for this SRM. To minimize contributions to the measurement uncertainty from elemental microheterogeneity, a minimum sample mass of 24 mg is recommended for analysis. Read More

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Efficient catalytic conversion of microalgae residue solid waste into lactic acid over a Fe-Sn-Beta catalyst.

Sci Total Environ 2021 Jun 27;771:144891. Epub 2021 Jan 27.

State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment of Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Electronic address:

Microalgae residue was efficiently converted into lactic acid with a high yield (33.9%) under mild reaction conditions (210 °C, 2 h) over a Fe-Sn-Beta catalyst. Under the action of homogeneous HO and distinct Lewis acid sites on the catalyst, the production of lactic acid from microalgae residue underwent three main reaction steps: hydrolysis, isomerization, and retro-aldol condensation. Read More

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Reorientational dynamics of highly asymmetric binary non-polymeric mixtures - a dielectric spectroscopy study.

Phys Chem Chem Phys 2021 Mar 18;23(12):7200-7212. Epub 2021 Mar 18.

Department of Inorganic Chemistry III and Northern Bavarian NMR Centre, University of Bayreuth, 95440 Bayreuth, Germany.

We present an analysis of dielectric spectra measured for a specially designed non-polymeric asymmetric binary glass former characterized by a large difference of the component's T (ΔT = 216 K). We cover the whole additive concentration range from 4% up to 90% (by mass). Two main relaxations α and α are identified, which are characterized by well separated time scales and are attributed to the dynamics associated with the high-T component (α) and the low-T component (α). Read More

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Myxoid liposarcoma: MRI features with histological correlation.

Radiologia 2021 Mar 12. Epub 2021 Mar 12.

Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, España.

Background And Aims: Myxoid liposarcoma is classified in the group of sarcomas with adipose differentiation, which is the second most common group of sarcomas. However, myxoid liposarcoma is not a homogeneous entity, because the behavior and clinical course of these tumors can vary widely. This study aimed to describe the magnetic resonance imaging (MRI) features of myxoid liposarcomas and to determine whether the MRI features are associated with the histologic grade and can differentiate between low-grade and high-grade tumors and thus help in clinical decision making. Read More

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Characterization of thermal storage stability of waste plastic pyrolytic char modified asphalt binders with sulfur.

PLoS One 2021 15;16(3):e0248465. Epub 2021 Mar 15.

Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India.

Pyrolysis has gained a strong interest in recent times for sustainable treatment and recovery of energy-rich products from different wastes including plastic. Waste plastic pyrolytic char (PPC) generated as a carbonaceous by-product in the pyrolysis process, is gaining attention as an asphalt binder modifier. Adequate thermal storage stability is an essential requirement for a modified asphalt binder to ensure that the composite offers integrity and homogeneous properties during its storage, handling and transportation in the field. Read More

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Efficient optimization based thresholding technique for analysis of alzheimer MRIs.

Int J Neurosci 2021 Mar 31:1-14. Epub 2021 Mar 31.

Department of Computer Science and Engineering, Hindustan Institute of Technology and Science, Chennai, India.

Alzheimer is a type of dementia that usually affects older adults by creating memory loss due to damaged brain cells. The damaged brain cells lead to shrinkage in the size of the brain and it is very difficult to extract the grey matter (GM) and white matter (WM). The segmentation of GM and WM is a challenging task due to its homogeneous nature between the neighborhood tissues. Read More

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Overview of the socio-economic consequences of heart failure.

Authors:
Franz P Hessel

Cardiovasc Diagn Ther 2021 Feb;11(1):254-262

SRH Berlin University of Applied Science, Berlin, Germany.

Heart failure (HF) is a frequent cause of morbidity and mortality worldwide. The prevalence of HF increases, and in high-income countries, 1-2% of total healthcare expenditure is spent on HF. This article gives an overview on the impact of HF on health-related quality of life (HRQoL) and the economic burden of HF. Read More

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February 2021

Deep Learning Optimizes Data-Driven Representation of Soil Organic Carbon in Earth System Model Over the Conterminous United States.

Front Big Data 2020 3;3:17. Epub 2020 Jun 3.

Department of Biological Sciences, Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, United States.

Soil organic carbon (SOC) is a key component of the global carbon cycle, yet it is not well-represented in Earth system models to accurately predict global carbon dynamics in response to climate change. This novel study integrated deep learning, data assimilation, 25,444 vertical soil profiles, and the Community Land Model version 5 (CLM5) to optimize the model representation of SOC over the conterminous United States. We firstly constrained parameters in CLM5 using observations of vertical profiles of SOC in both a batch mode (using all individual soil layers in one batch) and at individual sites (site-by-site). Read More

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Towards better understanding of the heparin role in NETosis: feasibility of using native mass spectrometry to monitor interactions of neutrophil elastase with heparin oligomers.

Int J Mass Spectrom 2021 May 14;463. Epub 2021 Feb 14.

Chemistry Department, University of Massachusetts-Amherst, Amherst, MA.

Neutrophil elastase is a serine protease released by neutrophils, and its dysregulation has been associated with a variety of debilitating pathologies, most notably cystic fibrosis. This protein is also a prominent component of the so-called neutrophil extracellular traps (NETs), whose formation is a part of the innate immunity response to invading pathogens, but also contributes to a variety of pathologies ranging from autoimmune disorders and inflammation to cancer to thrombotic complications in COVID-19. Retention of neutrophil elastase within NETs is provided by ejected DNA chains, although this protein is also capable of interacting with a range of other endogenous polyanions, such as heparin and heparan sulfate. Read More

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4,4'-trimethylenedipiperidine as a nitrogen heterocycle solvent and/or catalyst: Liquid phase tandem Knoevenagel-Michael condensation.

Turk J Chem 2021 17;45(1):261-268. Epub 2021 Feb 17.

Nanotechnology and Catalysis Research Centre, Institute for Advanced Studies, University of Malaya, Kuala Lumpur Malaysia.

Liquid phase tandem Knoevenagel-Michael condensation of various aromatic and heteroaromatic aldehydes with barbituric acid or 2-thiobarbituric acid and malononitrile was studied in a one-pot three-component reaction. For the first time, TMDP was employed as a safe and efficient solvent and/or catalyst in the liquid and aqueous ethanol medium, respectively, for the practical and eco-friendly Knoevenagel-Michael condensation. The reactions were carried out by using greener procedures, including a) the use of TMDP as an N-heterocycle organocatalyst in a green medium including water and ethanol (1:1 v/v) at reflux temperature, and b) the use of TMDP as a dual solvent-catalyst at 65 °C in the absence of any solvent. Read More

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February 2021

The differences in viscoelastic properties of subtendons result from the anatomical tripartite structure of human Achilles tendon - ex vivo experimental study and modeling.

Acta Biomater 2021 Apr 4;125:138-153. Epub 2021 Mar 4.

AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics, Mickiewicza 30 Av., Krakow 30-059, Poland.

The human Achilles tendon (AT) is a hierarchical structure macroscopically composed of three subtendons originating from the soleus (SOL) and gastrocnemius (GL, GM) muscles. According to recent reports, the divisible structure of the AT together with diverse material properties of its subtendons are suspected as a probable cause of non-homogeneous stress and strain distribution occurring in loaded AT. Despite numerous investigations on human AT, there is still relatively little knowledge regarding mechanical properties of subtendon-level hierarchy, which is crucial in fully understanding the multiscale relationship which governs tendon mechanics. Read More

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Fatty Acid Composition from Olive Oils of Portuguese Centenarian Trees Is Highly Dependent on Olive Cultivar and Crop Year.

Foods 2021 Feb 25;10(3). Epub 2021 Feb 25.

Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.

The high proportions of monounsaturated fatty acids (MUFA) represent one of the most important technological and nutritional features of olive oils. The present study details the fatty acid (FA) composition of autochthonous cultivars (Lentisca, Madural, Redondal, Rebolã, Verdeal, and Verdeal Transmontana) produced from centenarian trees during five crop years (2013-2017). Olive cultivar highly influenced the FA composition, namely, oleic acid (70. Read More

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February 2021