410 results match your criteria median pore


Effects of Strain Rate and Temperature on the Mechanical Properties of Simulated Silica Ionogels.

Authors:
R Skelton R E Jones

J Phys Chem B 2021 Jul 21. Epub 2021 Jul 21.

Sandia National Laboratories, Livermore, California 94550, United States.

Ionogels are hybrid materials formed by impregnating the pore space of a solid matrix with a conducting ionic liquid. By combining the properties of both component materials, ionogels can act as self-supporting electrolytes in Li batteries. In this study, molecular dynamics simulations are used to investigate the dependence of mechanical properties of silica ionogels on solid fraction, temperature, and pore width. Read More

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Euryhelmis squamula (Digenea: Heterophyidae) Recovered from Korean Raccoon Dog, Nyctereutes procyonoides koreensis, in Korea.

Korean J Parasitol 2021 Jun 21;59(3):303-309. Epub 2021 Jun 21.

College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea.

In this study, we intended to describe an unrecorded species of heterophyid trematode recovered from the small intestine of a Korean raccoon dog, Nyctereutes procyonoides koreensis, in Korea. A total of 13 small flukes were collected from a deceased Korean raccoon dog which was found in Chuncheon-si, Gangwon-do, Korea in May 2017. The trematode body were covered with many small spines, rectangular, broader than long, 807-1,103 µm long and 1,270-1,550 µm wide. Read More

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Design and characterization of a 3D-printed axon-mimetic phantom for diffusion MRI.

Magn Reson Med 2021 Jun 30. Epub 2021 Jun 30.

Centre for Functional and Metabolic Mapping, Robarts Research Institute, Western University, London, Canada.

Purpose: To introduce and characterize inexpensive and easily produced 3D-printed axon-mimetic diffusion MRI phantoms in terms of pore geometry and diffusion kurtosis imaging metrics.

Methods: Phantoms were 3D-printed with a composite printing material that, after the dissolution of the polyvinyl alcohol, exhibits microscopic fibrous pores. Confocal microscopy and synchrotron phase-contrast micro-CT imaging were performed to visualize and assess the pore sizes. Read More

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Ship navigation disturbance alters multiphase distribution of perfluoroalkyl acids and increases their ecological risk in waterways.

Sci Total Environ 2021 Jun 21;793:148576. Epub 2021 Jun 21.

Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, PR China; Yangtze Institute for Conservation and Development, Hohai University, Nanjing 210098, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.

As a global persistent organic pollutant, perfluoroalkyl acids (PFAAs) have aroused great public concern. However, little is known regarding the effect of ship navigation disturbance on the transport and fate of PFAAs in inland waterways developed regions. In the present study, overlying water, pore water, suspended particulate matter (SPM), and sediment were collected from waterways (WWs), non-navigable channels (NCs), and ports (PTs) in Taihu Lake Basin. Read More

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Reconstruction and seepage simulation of a coal pore-fracture network based on CT technology.

PLoS One 2021 24;16(6):e0252277. Epub 2021 Jun 24.

National Center for Occupational Safety and Health, NHC, Beijing, China.

The distribution of multiscale pores and fractures in coal and rock is an important basis for reflecting the capacity of fluid flow in coal seam seepage passages. Accurate extraction and qualitative and quantitative analysis of pore-fracture structures are helpful in revealing the flow characteristics of fluid in seepage channels. The relationship between pore and fracture connectivity can provide a scientific reference for optimizing coal seam water injection parameters. Read More

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A tuned gelatin methacryloyl (GelMA) hydrogel facilitates myelination of dorsal root ganglia neurons in vitro.

Mater Sci Eng C Mater Biol Appl 2021 Jul 24;126:112131. Epub 2021 Apr 24.

Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta T2N 1N4, Canada. Electronic address:

Investigating axonal myelination by Schwann cells (SCs) is crucial for understanding mechanisms underlying demyelination and remyelination, which may help gain insights into incurable disorders like neurodegenerative diseases. In this study, a gelatin-based hydrogel, gelatin methacryloyl (GelMA), was optimized to achieve the biocompatibility, porosity, mechanical stability, and degradability needed to provide high cell viability for dorsal root ganglia (DRG) neurons and SCs, and to enable their long-term coculture needed for myelination studies. The results of cell viability, neurite elongation, SC function and maturation, SC-axon interaction, and myelination were compared with two other commonly used substrates, namely collagen and Poly-d Lysine (PDL). Read More

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The Efficacy and Safety of Fractional 1064 nm Nd:YAG Picosecond Laser Combined With Intense Pulsed Light in the Treatment of Atrophic Acne Scar: A Split-Face Study.

Lasers Surg Med 2021 Jun 3. Epub 2021 Jun 3.

Department of Dermatology, Huashan Hospital, Shanghai Medical College, Fudan University, 12 Wulumuqi Road, Shanghai, 200040, China.

Background And Objectives: To evaluate the efficacy and safety of fractional 1064 nm Nd:YAG picosecond laser combined with intense pulsed light (IPL) in the treatment of atrophic acne scar with post-inflammatory erythema (PIE). © 2021 Wiley Periodicals LLC.

Study Design/materials And Methods: Seventeen patients received five sessions of treatment at weeks 0, 4, 8, 12, 16 and were followed up at week 28. Read More

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POSTHOVITELLINUM PSILOTERMINAE N. GEN., N. SP. (DIGENEA: LISSORCHIIDAE) INFECTING THE INTESTINE OF CYCLOCHEILOS ENOPLOS (CYPRINIFORMES: CYPRINIDAE) IN THE MEKONG RIVER, VIETNAM.

J Parasitol 2021 May;107(3):431-445

Aquatic Parasitology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, Auburn, Alabama, 36849.

Herein we describe a new species and propose a new genus, Posthovitellinum psiloterminae n. gen., n. Read More

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Description of Lutziella swatensis sp.n. (Trematoda: Dicrocoelidae) from Rattus rattus in Swat, Pakistan.

Braz J Biol 2021 21;82:e225092. Epub 2021 May 21.

Hazara University Mansehra, Department of Zoology, Mansehra, Pakistan.

A new species of the genus Lutziella (Rohde, 1966) Yamaguti, 1971 is described here and named Lutziella swatensis sp.nov. from the liver of rat (Rattus rattus L. Read More

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Patients scheduled for TAVI tend to form abnormal fibrin clots more resistant to lysis: the impact of age.

Kardiol Pol 2021 May 18. Epub 2021 May 18.

Kraków Center for Medical Research and Technologies, John Paul II Hospital, Kraków, Poland.

Background: Fibrin accumulation within the stenotic leaflets associated with impaired fibrinolysis was observed in severe aortic stenosis (AS). Little is known about fibrin clot properties in patients scheduled for transcatheter aortic valve implantation (TAVI).

Aim: We investigated whether TAVI patients display a more prothrombotic state, including suppressed fibrinolytic capacity compared to those undergoing surgery. Read More

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Validating pore size estimates in a complex microfiber environment on a human MRI system.

Magn Reson Med 2021 09 7;86(3):1514-1530. Epub 2021 May 7.

Cardiff University Brain Research Imaging Centre (CUBRIC), Cardiff University, Cardiff, United Kingdom.

Purpose: Recent advances in diffusion-weighted MRI provide "restricted diffusion signal fraction" and restricting pore size estimates. Materials based on co-electrospun oriented hollow cylinders have been introduced to provide validation for such methods. This study extends this work, exploring accuracy and repeatability using an extended acquisition on a 300 mT/m gradient human MRI scanner, in substrates closely mimicking tissue, that is, non-circular cross-sections, intra-voxel fiber crossing, intra-voxel distributions of pore-sizes, and smaller pore-sizes overall. Read More

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September 2021

The gill transcriptome reveals unique antimicrobial features that protect Nibea albiflora from Cryptocaryon irritans infection.

J Fish Dis 2021 Aug 29;44(8):1215-1227. Epub 2021 Apr 29.

Key Laboratory of Applied Marine Biotechnology, Ministry of Education; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture; School of Marine Sciences, Ningbo University, Ningbo, China.

Cryptocaryonosis is the greatest threat to most teleost species among all parasitic diseases, causing mass loss to the marine aquaculture industry. Epidemiological investigation of teleost susceptibility to Cryptocaryon irritans infection revealed that yellow drum (Nibea albiflora) is highly resistant. In order to further understand the activation of the immune system in the gill, which is one of the main mucosal-associated lymphoid tissues and a target of parasites, transcriptome analysis of the yellow drum gill was performed. Read More

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Computational method and program for generating a porous scaffold based on implicit surfaces.

Comput Methods Programs Biomed 2021 Jun 6;205:106088. Epub 2021 Apr 6.

Dept. of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand. Electronic address:

Background And Objective: The triply periodic minimal surface (TPMS) method effectively mimics the porous scaffold for tissue engineering with continuous topology, pore interconnections, and high surface area to volume ratio. However, the process to generate a three-dimensional (3D) mesh of porous structure from the mimicked organs is complicated for biologists and sometimes requires various software. Herein, we present the standalone program called "Scaffolder" for generating the porous topology from the user-input 3D model to the open-source community. Read More

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Morphology, development stages, and phylogeny of the (Nematoda: Diplogastridae), a phoront of the bark beetle from the elm Huds. in Northwest Russia.

J Nematol 2021 11;53. Epub 2021 Mar 11.

Plant Pest Diagnostic Center, California Department of Food and Agriculture, 3294 Meadowview Road, Sacramento, CA, 95832.

The nematode was found in galleries, adults, and larvae of , the vector of the Dutch elm disease, in St. Petersburg parks. This nematode co-occurred with , which is another phoretic partner of . Read More

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A proposal of Zhuo, Li, Li, Yu & Liao, 2007 as a junior synonyms of Gu, Braasch, Burgermeister, Brandstetter & Zhang, 2006.

J Nematol 2020 13;52. Epub 2021 Jan 13.

Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, 510642, Guangdong, P. R. China.

was first reported in China, and later found in Japan and Korea. It is characterized by a relatively slim body (a = 42 and 57 for females and males, respectively). The excretory pore is located at level of median bulb, the lateral field has three lines, and a small vulval flap is present. Read More

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January 2021

Composite Binder Containing Industrial By-Products (FCCCw and PSw) and Nano SiO.

Materials (Basel) 2021 Mar 25;14(7). Epub 2021 Mar 25.

Faculty of Civil Engineering, Institute of Building Materials and Components, Brno University of Technology, 60200 Brno, Czech Republic.

This article analyzes the integrated effect of industrial by-products (spent fluidized bed catalytic cracking catalyst waste (FCCCw) and paper sludge waste (PSw) generated in paper manufacturing) combined with nano-SiO (NS) on the properties of cement binder, when a certain part of the binder is replaced with the said by-products in the cement mix. Standard testing methods were used to analyze the physical and mechanical properties of cement-based materials. For structure analysis, we used X-ray diffraction (XRD), derivative thermogravimetry (DTG), mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM). Read More

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Three new species of oribatid mites of the family Galumnidae (Acari, Oribatida) from South Africa.

Zootaxa 2021 Jan 27;4920(1):zootaxa.4920.1.3. Epub 2021 Jan 27.

Institute of Environmental and Agricultural Biology (X-BIO), Tyumen State University, Tyumen, Russia.

Three new species of oribatid mites of the family Galumnidae are described from soil and coniferous litter of Hogsback State Forest, Eastern Cape Province, South Africa. Pilogalumna hogsbackensis sp. nov. Read More

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January 2021

Endoscopic negative pressure therapy (ENPT) in head and neck surgery: first experiences in treatment of postoperative salivary fistulas and cervical esophageal perforations.

Eur Arch Otorhinolaryngol 2021 Mar 14. Epub 2021 Mar 14.

Department of General, Visceral, Thoracic and Vascular Surgery, Katholisches Marienkrankenhaus gGmbH, Hamburg, Germany.

Introduction: Iatrogenic cervical esophageal perforations (CEP) and postoperative salivary fistulas (PSF) are some of the complications requiring treatment in head and neck surgery. Conservative, surgical and endoscopic therapeutic techniques are used. Both CEP and PSF are potentially life-threatening complications and require intensive treatment. Read More

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Abdominal wall reconstruction using biosynthetic absorbable mesh in high-risk complex ventral hernia.

Swiss Med Wkly 2021 Mar 1;151:w20449. Epub 2021 Mar 1.

Department of General Surgery, Royal Bolton Hospital, Bolton, United Kingdom.

Background: Biosynthetic mesh may represent an improvement on biological and large pore synthetic meshes for high-risk complex ventral hernia repair. This study aimed to evaluate the performance of polyglycolic acid (PGA):trimethylene carbonate (TMC) biosynthetic mesh for reinforcement of the midline fascial closure in a single-stage repair of complex ventral hernias in high-risk patients.

Methods: A retrospective review was undertaken for patients who underwent a planned open single-stage complex ventral hernia repair with a single unit of PGA:TMC biosynthetic mesh between May 2013 and August 2017. Read More

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Morphological factors associated with giant vacuoles with I-pores in Schlemm's canal endothelial cells of human eyes: A serial block-face scanning electron microscopy study.

Exp Eye Res 2021 Apr 9;205:108488. Epub 2021 Feb 9.

Department of Ophthalmology, Boston University School of Medicine, Boston, MA, USA; Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA, USA. Electronic address:

Increased intraocular pressure (IOP) is the main risk factor for primary open-angle glaucoma and results from impaired drainage of aqueous humor (AH) through the trabecular outflow pathway. AH must pass the inner wall (IW) endothelium of Schlemm's canal (SC), which is a monolayer held together by tight junctions, to exit the eye. One route across the IW is through giant vacuoles (GVs) with their basal openings and intracellular pores (I-pores). Read More

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Comparative study of three sampling methods for microplastics analysis in seawater.

Sci Total Environ 2021 Apr 24;765:144495. Epub 2020 Dec 24.

Marine Bioresource and Environment Research Center, Key Lab of Ecological Environment Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China.

Microplastics, as an emerging pollutant, are widely spread in the oceans. The sampling method is the most basic and important factor affecting the reported microplastic abundance data. Three sampling methods, most commonly used for microplastic collection, including direct filtration with 0. Read More

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Prognostic significance of SET-NUP214 fusion gene in acute leukemia after allogeneic hematopoietic stem cell transplantation.

Medicine (Baltimore) 2020 Dec;99(50):e23569

Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell.

The SET nuclear proto-oncogene (SET)-nucleoporin (NUP) 214 fusion gene (SET-NUP214) is a rare leukemia fusion gene. Due to the limited number of samples with SET-NUP214 fusion gene in previous studies, the significance of SET-NUP214 for measurable residual disease (MRD) monitoring in patients with acute leukemia (AL) is still unclear. Our study aimed to observe the dynamic changes in SET-NUP214 expression before and after allogeneic hematopoietic stem cell transplantation (allo-HSCT), and analyzed whether SET-NUP214 could be used to evaluate MRD status. Read More

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December 2020

Loose Fibrin Clot Structure and Increased Susceptibility to Lysis Characterize Patients with Central Acute Pulmonary Embolism: The Impact of Isolated Embolism.

Thromb Haemost 2021 Apr 13;121(4):529-537. Epub 2020 Nov 13.

Institute of Cardiology, Jagiellonian University Medical College, Krakow, Poland.

Background:  Prothrombotic fibrin clot properties are associated with higher early mortality risk in acute pulmonary embolism (PE) patients. It is unknown whether different types of PE are associated with particular clot characteristics.

Methods:  We assessed 126 normotensive, noncancer acute PE patients (median age: 59 [48-70] years; 52. Read More

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Estimation of Cortical Bone Microstructure From Ultrasound Backscatter.

IEEE Trans Ultrason Ferroelectr Freq Control 2021 Apr 26;68(4):1081-1095. Epub 2021 Mar 26.

Multichannel pulse-echo ultrasound using linear arrays and single-channel data acquisition systems opens new perspectives for the evaluation of cortical bone. In combination with spectral backscatter analysis, it can provide quantitative information about cortical microstructural properties. We present a numerical study, based on the finite-difference time-domain method, to estimate the backscatter cross section of randomly distributed circular pores in a bone matrix. Read More

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Amyloid-β peptides slightly affect lifespan or antimicrobial peptide gene expression in Drosophila melanogaster.

BMC Genet 2020 10 22;21(Suppl 1):65. Epub 2020 Oct 22.

Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia.

Background: Beta-amyloid peptide (Aβ) is the key protein in the pathogenesis of Alzheimer's disease, the most common age-related neurodegenerative disorder in humans. Aβ peptide induced pathological phenotypes in different model organisms include neurodegeneration and lifespan decrease. However, recent experimental evidence suggests that Aβ may utilize oligomerization and fibrillization to function as an antimicrobial peptide (AMP), and protect the host from infections. Read More

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October 2020

Insights into the effect of NaOH on the hydration products of solidified cement-NaNO matrices and leaching behavior of Sr.

Sci Total Environ 2021 Feb 30;755(Pt 1):142581. Epub 2020 Sep 30.

State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.

The low-level and intermediate-level radioactive waste is generally an alkaline solution with high concentration of sodium salts. Moreover, extra NaOH will be added into the matrices when the high content of mineral admixtures is used in the preparation of solidified cement matrices. This study mainly researches the influence of NaOH on the structure of C-S-H gels and the leaching rate of Sr in the solidified cement matrices by isothermal conduction calorimetry, X-ray diffractometry, thermogravimetry, Si nuclear magnetic resonance, mercury intrusion porosimetry and inductively coupled plasma. Read More

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February 2021

Effects of distance to the sea and geomorphological characteristics on the quantity and distribution of microplastics in beach sediments of Granada (Spain).

Sci Total Environ 2020 Dec 27;746:142023. Epub 2020 Aug 27.

Department of Chemical Engineering, University of Granada, 18071 Granada, Spain. Electronic address:

Microplastics became an unprecedented challenge and mapping their contamination all over the world is needed in order to establish baseline levels and identify the polymers in order to enhance adequate legislation and policy. The main objective of this study is to demonstrate the existence of microplastic pollution on three beaches on the coast of Granada (Spain), namely La Herradura, Motril Beach and La Rábita, characterizing the particles and the relationships in their distribution. This may contribute supporting the studies carried out at a national level in accordance with the Directive on Marine Strategy (2008/56/EC). Read More

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December 2020

Effects of beta-tricalcium phosphate nanoparticles on the properties of a thermosensitive chitosan/collagen hydrogel and controlled release of quercetin.

J Biomed Mater Res A 2021 Jul 12;109(7):1147-1159. Epub 2020 Oct 12.

Oral and Maxillofacial Surgery Division, Faculty of Dentistry, Thammasat University Rangsit campus, Pathum Thani, Thailand.

In the present study, an inorganic matrix of beta-tricalcium phosphate (bTCP) nanoparticles and quercetin was incorporated into an organic matrix of 2:1 (w/w) chitosan/collagen composite to fabricate thermosensitive bTCP-chitosan/collagen-quercetin hydrogels. A sol-gel transition of the hydrogels was stimulated by beta-glycerophosphate (bGP) and temperature changes at physiological temperature and pH levels. Thereafter, the effects of 1%-3% (w/v) bTCP on properties of the bTCP-bGP-2:1 (w/w) chitosan/collagen hydrogels were investigated. Read More

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Microsieves for the detection of circulating tumor cells in leukapheresis product in non-small cell lung cancer patients.

Transl Lung Cancer Res 2020 Aug;9(4):1093-1100

Department of Pulmonary Diseases, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.

Background: Circulating tumor cells (CTC) in non-small cell lung cancer (NSCLC) patients are a prognostic and possible therapeutic marker, but have a low frequency of appearance. Diagnostic leukapheresis (DLA) concentrates CTC and mononuclear cells from the blood. We evaluated a protocol using two VyCAP microsieves to filter DLA product of NSCLC patients and enumerate CTC, compared with CellSearch as a gold standard. Read More

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Comparison of differences in bone microarchitecture in adult- versus juvenile-onset type 1 diabetes Asian males versus non-diabetes males: an observational cross-sectional pilot study.

Endocrine 2021 01 11;71(1):87-95. Epub 2020 Sep 11.

Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, Peking Union Medical College Hospital, Chinese Academy of Medical Science, 100730, Beijing, China.

Purpose: Evidence about bone microarchitecture in Asian type 1 diabetes (T1D) patients is lacking. We assessed the bone microarchitecture in T1D patients versus controls and compare the differences between juvenile-onset and adult-onset T1D patients.

Methods: This cross-sectional study recruited 32 Asian males with T1D and 32 age-, sex-, and body mass index (BMI)-matched controls. Read More

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January 2021