839,484 results match your criteria produced erd

Simultaneous separation and immobilization of Cr(VI) from layered double hydroxide via reconstruction of the key phases.

J Hazard Mater 2021 Apr 6;416:125807. Epub 2021 Apr 6.

School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510006, PR China; School of Metallurgy and Environment, Central South University, Changsha 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China. Electronic address:

Layered double hydroxide (LDH) is one of the key host phases of Cr(VI) in the natural environment and chromite ore processing residue (COPR), causing serious pollution by Cr(VI). Therefore, efficient extraction or immobilization of the incorporated Cr(VI) in LDH is urgently needed. In this work, simultaneous separation and immobilization of Cr(VI) in LDH by using MgCl·6HO under thermal treatment is innovatively proposed. Read More

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Bioleaching of vanadium by Acidithiobacillus ferrooxidans from vanadium-bearing resources: Performance and mechanisms.

J Hazard Mater 2021 Apr 8;416:125843. Epub 2021 Apr 8.

School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China.

Bioleaching is promising to meet the demand of strategic vanadium both economically and environmentally. Whereas the combination of bioleaching with traditional techniques is of great interest, little is known on bioleaching of vanadium from abundant vanadium-bearing resources utilized/produced in existing processes. This study investigated the bioleaching of vanadium from vanadium-titanium magnetite, steel slag, and clinker, which are common raw mineral and intermediates used in conventional vanadium extraction process. Read More

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Effects of substrate temperature on patterns produced by dried droplets of proteins.

Colloids Surf B Biointerfaces 2021 Apr 14;203:111763. Epub 2021 Apr 14.

Facultad de Ciencias en Física y Matemáticas, Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico. Electronic address:

Rapid diagnosis provides better clinical management of patients, helps control possible outbreaks, and increases survival. The study of deposits produced by the evaporation of droplets is a useful tool in the diagnosis of some health problems. With the aim to improve diagnostic time in clinical practice where we use the evaporation of droplets, we explored the effects of substrate temperature on pattern formation of dried droplets in globular protein solutions. Read More

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Commensal flora triggered target anti-inflammation of alginate-curcumin micelle for ulcerative colitis treatment.

Colloids Surf B Biointerfaces 2021 Apr 8;203:111756. Epub 2021 Apr 8.

The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou, 325027, PR China. Electronic address:

Ulcerative colitis (UC) is a chronic, idiopathic inflammatory bowel disease characterized by dysregulation of colon immune response. Curcumin (Cur) has strong anti-inflammatory activities, but the application is severely hindered by the extremely hydrophobicity and pitiful bioavailability. Alginate (Alg), a natural polysaccharide with ideal solubility and biosafety, was introduced to prepare the esterified alginate-curcumin conjugate (Alg-Cur) and constructed stable Alg-Cur micelle in physiological solutions. Read More

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Zika virus infection during pregnancy protects against secondary infection in the absence of CD8 cells.

Virology 2021 Apr 9;559:100-110. Epub 2021 Apr 9.

Tulane National Primate Research Center, Tulane University, Covington, LA, USA; Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, USA. Electronic address:

While T cell immunity is an important component of the immune response to Zika virus (ZIKV) infection generally, the efficacy of these responses during pregnancy remains unknown. Here, we tested the capacity of CD8 lymphocytes to protect from secondary challenge in four macaques, two of which were depleted of CD8 cells prior to rechallenge with a heterologous ZIKV isolate. The initial challenge during pregnancy produced transcriptional signatures suggesting complex patterns of immune modulation as well as neutralizing antibodies that persisted until rechallenge, which all animals efficiently controlled, demonstrating that the primary infection conferred adequate protection. Read More

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Integration of predictions and afferent signals in body ownership.

Cognition 2021 Apr 14;212:104722. Epub 2021 Apr 14.

Department of Neuroscience, Brain, Body and Self Laboratory, Karolinska Institutet, Sweden.

We aimed at investigating the contribution of sensory predictions triggered by the sight of an object moving towards the body for the sense of body ownership. We used a recently developed psychophysical discrimination task to assess body ownership in the rubber hand illusion. In this task, the participants had to choose which of the two right rubber hands in view felt most like their own, and the ownership discriminations were fitted to psychometric curves. Read More

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Possibility of using alternative fuels in Polish power plants in the context of mercury emissions.

Waste Manag 2021 Apr 14;126:578-584. Epub 2021 Apr 14.

AGH University of Science and Technology, Faculty of Energy and Fuels, Al. A. Mickiewicza 30, 30- 059 Krakow, Poland.

The progressive decarbonisation of industry is leading to a reduction in coal consumption and the substitution for coal with other types of fuels, including waste-derived alternative fuels. These fuels are characterised by high variation in the content of highly toxic mercury. Co-combustion with coal can cause significant emissions, exceeding mercury emission limits. Read More

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Long-term exposure to the fluoride blocks the development of chondrocytes in the ducks: The molecular mechanism of fluoride regulating autophagy and apoptosis.

Ecotoxicol Environ Saf 2021 Apr 14;217:112225. Epub 2021 Apr 14.

College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China. Electronic address:

Long-term exposure to excessive fluoride causes chronic damage in the body tissues and could lead to skeletal and dental fluorosis. Cartilage damage caused by excessive fluoride intake has gained wide attention, but how fluoride accumulation blocks the development of chondrocytes is still unclear. Here, we report a negative correlation between the length and growth plate width after NaF treatments via apoptosis and autophagy, with shrinkage of cells, nuclear retraction, dissolution of chondrocytes. Read More

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Zirconia-Reinforced Lithium Silicate (ZLS) mechanical and biological properties: a literature review.

J Dent 2021 Apr 14:103661. Epub 2021 Apr 14.

Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics and Digital Dentistry, University "Federico II" of Naples, Via Pansini 5, 80131, Naples, Italy. Electronic address:

Objectives: This paper aimed to provide a literature review of the mechanical and biological properties of zirconia-reinforced lithium silicate glass-ceramics (ZLS) in Computer-aided design / Computer-aided manufacturing (CAD/CAM) systems.

Data/sources: An extensive search of the literature for papers related to ZLS was made on the databases of PubMed/Medline, Scopus, Embase, Google Scholar, Dynamed, and Open Grey. The papers were selected by 3 independent calibrated reviewers. Read More

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Production and outmigration of young-of-year northern pike Esox lucius from natural and modified waterways connected to Lower Green Bay, Wisconsin.

J Fish Biol 2021 Apr 17. Epub 2021 Apr 17.

Department of Natural and Applied Sciences, Aquatic Ecology and Fisheries Laboratory, University of Wisconsin-Green Bay, Green Bay, WI, United States.

Production and outmigration of young-of-year (YOY) northern pike from natal sites in Lower Green Bay were documented over three consecutive years (2013-2015). We tested the hypothesis that spawning success and outmigration characteristics of YOY northern pike would vary among natural and anthropogenically modified habitats. Sixteen focal study locations were surveyed including a restored natural wetland, agricultural drainage ditches, a flooded forested wetland and several unimpounded tributaries. Read More

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Callose accumulation in specific phloem cell types reduces axillary bud growth in Arabidopsis thaliana.

New Phytol 2021 Apr 17. Epub 2021 Apr 17.

Sainsbury Laboratory, University of Cambridge, Cambridge, CB2 1LR, United Kingdom.

Shoot branching involves the coordinated regulation of the activity of meristems established in the axils of leaves along the stem (Mcsteen and Leyser, 2005). Once established, such axillary meristems often arrest as a dormant bud after the production of a few leaves. The hormone auxin, produced in the shoot apex, plays a central role in this process by moving downward in the stem and maintaining these axillary meristems in an inactive state, a process termed apical dominance (Morris, 1977, Snow, 1925, 1929). Read More

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Costal Osteoma: Report of a Case in an Unusual Site.

Am J Case Rep 2021 Apr 17;22:e930902. Epub 2021 Apr 17.

Department of Pathology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea.

BACKGROUND Osteoma is a benign bone tumor that typically arises in facial bones and less frequently in the long bones. It rarely occurs in the appendiceal skeleton. Pathologic findings are similar to those for parosteal osteosarcoma, periostitis ossificans, and osteoid osteoma. Read More

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Optimal Arytenoid Position in Laryngeal Framework Surgery: An Anatomic Human Larynx Study.

Laryngoscope 2021 Apr 17. Epub 2021 Apr 17.

Department of Surgery, Harvard Medical School, Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston, Massachusetts, U.S.A.

Objectives: The purpose of this study was to better understand the effects of stitch placement on arytenoid medialization by measuring normative cricoarytenoid joint anatomy and changes in arytenoid position when varying arytenopexy stitch configuration.

Methods: This adult human larynx study was done in two parts. First, measurements of the cricoid and arytenoid cartilage anatomy relevant to cricoarytenoid joint function were made in 45 preserved larynges (26 male (M), 19 female (F)) using digital calipers. Read More

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A new prenylated benzoquinone from Cyathocalyx pruniferus abrogates LPS-induced inflammatory responses associated with PGE, COX-2 and cytokines biosynthesis in human plasma.

Inflammopharmacology 2021 Apr 17. Epub 2021 Apr 17.

Faculty of Pharmacy, MAHSA University, Bandar Saujana Putra, 42610, Jenjarom, Selangor, Malaysia.

In our previous laboratory findings, Cyathocalyx pruniferus extracts exhibited platelet-activating factor inhibition, suggesting their anti-inflammatory potential. Hence, this study was designed with the aim to isolate phyto-constituents from C. pruniferus with potent anti-inflammatory activities. Read More

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Gaseous environment modulates volatile emission and viability loss during seed artificial ageing.

Planta 2021 Apr 17;253(5):106. Epub 2021 Apr 17.

Department of Comparative Plant and Fungal Biology, Royal Botanic Gardens, Kew, Wakehurst Place, Ardingly, UK.

Main Conclusion: Modulation of the gaseous environment using oxygen absorbers and/or silica gel shows potential for enhancing seed longevity through trapping toxic volatiles emitted by seeds during artificial ageing. Volatile profiling using non-invasive gas chromatography-mass spectrometry provides insight into the specific processes occurring during seed ageing. Production of alcohols, aldehydes and ketones, derived from processes such as alcoholic fermentation, lipid peroxidation and Maillard reactions, are known to be dependent on storage temperature and relative humidity, but little is known about the potential modulating role of the gaseous environment, which also affects seed lifespan, on volatile production. Read More

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Acidic pH enhances butyrate production from pectin by faecal microbiota.

FEMS Microbiol Lett 2021 Apr 17. Epub 2021 Apr 17.

Department of Chemistry and Biotechnology, Tallinn University of Technology, Tallinn, Estonia.

Environmental pH and gut transit rate are the key factors determining the dynamics of colonic microbiota. In this study, the effect of changing pH on the composition and metabolism of pooled faecal microbiota was elucidated at physiologically relevant dilution rates Dhigh = 0.2 and Dlow = 0. Read More

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Photoautotrophic production of renewable ethylene by engineered cyanobacteria: Steering the cell metabolism towards biotechnological use.

Physiol Plant 2021 Apr 17. Epub 2021 Apr 17.

Microbial Chemistry, Department of Chemistry - ångström, Uppsala University, Box 523, Uppsala, SWEDEN.

Ethylene is a volatile hydrocarbon with a massive global market in the plastic industry. The ethylene now used for commercial applications is produced exclusively from non-renewable petroleum sources, while competitive biotechnological production systems do not yet exist. This review focuses on the currently developed photoautotrophic bioproduction strategies that enable direct solar-driven conversion of CO into ethylene, based on the use of genetically engineered photosynthetic cyanobacteria expressing heterologous ethylene forming enzyme (EFE) from Pseudomonas syringae. Read More

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Neuronally expressed a-series gangliosides are sufficient to prevent the lethal age-dependent phenotype in GM3-only expressing mice.

J Neurochem 2021 Apr 17. Epub 2021 Apr 17.

University of Glasgow, Institute of Infection, Immunity & Inflammation.

Gangliosides are expressed on plasma membranes throughout the body and enriched in the nervous system. A critical role for complex a- and b-series gangliosides in central and peripheral nervous system ageing has been established through transgenic manipulation of enzymes in ganglioside biosynthesis. Disrupting GalNAc-transferase (GalNAc-T), thus eliminating all a- and b-series complex gangliosides (with consequent over-expression of GM3 and GD3) leads to an age-dependent neurodegeneration. Read More

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Valorization of byproducts from tropical fruits: A review, Part 2: Applications, economic, and environmental aspects of biorefinery via supercritical fluid extraction.

Compr Rev Food Sci Food Saf 2021 Apr 16. Epub 2021 Apr 16.

Business Unit Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Mol, Belgium.

The global trade of tropical fruits is expected to increase significantly in the coming years. In 2018, the production was approximately 100 million tones, an increase of 3.3% compared to the previous year. Read More

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Bioactive compounds in Apis mellifera monofloral honeys.

J Food Sci 2021 Apr 16. Epub 2021 Apr 16.

Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Santiago, Chile.

Honey is a natural product with a sweet flavor. Honey is made by the honeybee (Apis mellifera L.) from the nectar of flowers or other plant secretions that are collected near the hive. Read More

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The Application of Core Needle Biopsy Through the Trocar Hole in the Surgical Operation of Endoscopically Unresectable Giant Colon Polyps: A Systematic Review Study.

Adv Ther 2021 Apr 17. Epub 2021 Apr 17.

General Surgery Department, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, 100144, China.

Introduction: The study aimed to investigate the application of core needle biopsy through the trocar hole during surgery on endoscopically unresectable giant colon polyps.

Methods: The clinical data of 51 patients with endoscopically unresectable giant colon polyps from May 2016 to May 2020 were retrospectively analyzed. The primary observational outcomes were two comparative analyses of pathologic results, using the kappa index: comparison of the pathologic results from the preoperative colonoscopy and the postoperative pathologic results and comparison of the intraoperative pathologic results from core needle biopsy of the intestinal wall and the postoperative pathologic results. Read More

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Bacterial biosurfactant increases ex situ biodiesel bioremediation in clayey soil.

Biodegradation 2021 Apr 17. Epub 2021 Apr 17.

Civil and Environmental Engineering, Faculty of Engineering and Architecture, University of Passo Fundo, Campus I, Building L1, BR 285, km 171, Neighborhood São José, Mailbox 611, Passo Fundo, RS, CEP: 99052-900, Brazil.

The contamination of soils by oily compounds has several environmental impacts, which can be reversed through bioremediation, using biosurfactants as auxiliaries in the biodegradation process. In this study, we aimed to perform ex situ bioremediation of biodiesel-contaminated soil using biosurfactants produced by Bacillus methylotrophicus. A crude biosurfactant was produced in a whey-based culture medium supplemented with nutrients and was later added to biodiesel-contaminated clayey soil. Read More

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Characterization of a thermostable and solvent-tolerant laccase produced by Streptomyces sp. LAO.

Biotechnol Lett 2021 Apr 17. Epub 2021 Apr 17.

SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.

Objectives: Decaying wood samples were collected, and actinomycetes were isolated and screened for laccase production. The identity of the efficient laccase-producing isolate was confirmed by using a molecular approach. Fermentation conditions for laccase production were optimized, and laccase biochemical properties were studied. Read More

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Low glucose and high pyruvate reduce the production of 2-oxoaldehydes, improving mitochondrial efficiency, redox regulation and stallion sperm function.

Biol Reprod 2021 Apr 16. Epub 2021 Apr 16.

Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain.

Energy metabolism in spermatozoa is complex and involves the metabolism of carbohydrate fatty acids and amino acids. The ATP produced in the electron transport chain (ETC) in the mitochondria appears to be crucial for both sperm motility and maintaining viability, while glycolytic enzymes in the flagella may contribute to ATP production to sustain motility and velocity. Stallion spermatozoa seemingly use diverse metabolic strategies, and in this regard, a study of the metabolic proteome showed that gene ontology (GO) terms and Reactome pathways related to pyruvate metabolism and the Krebs cycle were predominant. Read More

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H-CO polymer electrolyte fuel cell that generates power while evolving CH at the PtRu/C cathode.

Sci Rep 2021 Apr 16;11(1):8382. Epub 2021 Apr 16.

Department of Materials Science and Technology, Graduate School of Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188, Japan.

Generating electric power using CO as a reactant is challenging because the electroreduction of CO usually requires a large overpotential. Herein, we report the design and development of a polymer electrolyte fuel cell driven by feeding H and CO to the anode (Pt/C) and cathode (PtRu/C), respectively, based on their theoretical electrode potentials. Pt-Ru/C is a promising electrocatalysts for CO reduction at a low overpotential; consequently, CH is continuously produced through CO reduction with an enhanced faradaic efficiency (18. Read More

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High spatial resolution global ocean metagenomes from Bio-GO-SHIP repeat hydrography transects.

Sci Data 2021 Apr 16;8(1):107. Epub 2021 Apr 16.

Department of Earth System Science, University of California at Irvine, Irvine, CA, USA.

Detailed descriptions of microbial communities have lagged far behind physical and chemical measurements in the marine environment. Here, we present 971 globally distributed surface ocean metagenomes collected at high spatio-temporal resolution. Our low-cost metagenomic sequencing protocol produced 3. Read More

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Mitochondrial hydrogen peroxide positively regulates neuropeptide secretion during diet-induced activation of the oxidative stress response.

Nat Commun 2021 Apr 16;12(1):2304. Epub 2021 Apr 16.

Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.

Mitochondria play a pivotal role in the generation of signals coupling metabolism with neurotransmitter release, but a role for mitochondrial-produced ROS in regulating neurosecretion has not been described. Here we show that endogenously produced hydrogen peroxide originating from axonal mitochondria (mtHO) functions as a signaling cue to selectively regulate the secretion of a FMRFamide-related neuropeptide (FLP-1) from a pair of interneurons (AIY) in C. elegans. Read More

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Gallium nitride catalyzed the direct hydrogenation of carbon dioxide to dimethyl ether as primary product.

Nat Commun 2021 Apr 16;12(1):2305. Epub 2021 Apr 16.

Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China.

The selective hydrogenation of CO to value-added chemicals is attractive but still challenged by the high-performance catalyst. In this work, we report that gallium nitride (GaN) catalyzes the direct hydrogenation of CO to dimethyl ether (DME) with a CO-free selectivity of about 80%. The activity of GaN for the hydrogenation of CO is much higher than that for the hydrogenation of CO although the product distribution is very similar. Read More

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Central amygdala inflammation drives pain hypersensitivity and attenuates morphine analgesia in experimental autoimmune encephalomyelitis.

Pain 2021 Apr 9. Epub 2021 Apr 9.

Department of Pharmacology, University of Alberta, Edmonton, AB, Canada, T6E 2H7 Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB, Canada, T6G 2E1 Department of Anesthesiology and Pain Medicine, University of Alberta, Edmonton, AB, Canada, T6G 2G3.

Abstract: Chronic pain is a highly prevalent symptom associated with the autoimmune disorder multiple sclerosis (MS). The central nucleus of the amygdala plays a critical role in pain processing and modulation. Neuropathic pain alters nociceptive signaling in the central amygdala, contributing to pain chronicity and opioid tolerance. Read More

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Type 2 immunity induced by bladder extracellular matrix enhances corneal wound healing.

Sci Adv 2021 Apr 16;7(16). Epub 2021 Apr 16.

Translational Tissue Engineering Center, Johns Hopkins School of Medicine, Baltimore, MD 21231, USA.

The avascular nature of cornea tissue limits its regenerative potential, which may lead to incomplete healing and formation of scars when damaged. Here, we applied micro- and ultrafine porcine urinary bladder matrix (UBM) particulate to promote type 2 immune responses in cornea wounds. Results demonstrated that UBM particulate substantially reduced corneal haze formation as compared to the saline-treated group. Read More

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