• Nonprecious-metal catalysts with atomically dispersed active sites demonstrated high activity and selectivity in a series of catalysis reactions, the rational design and massive synthesis of such catalysts are of great interest but remains a huge challenge. (researchsquare.com)
  • This strategy presents a practical and green method for the industrial manufacture of nonprecious-metal single-site catalysts with predictable structure. (researchsquare.com)
  • 1-4 As we know, early transition-metal can form strong M-O bond, which can be immobilized on the support to produce single-sited catalysts. (researchsquare.com)
  • During the past decade, by trapping the metal atom with the vacancy defects of the support materials (such as nitrogen-rich carbon or metal oxides), 5,6 single atom catalysts (SAC) have emerged as the quasi-molecular heterogenous catalyst, and different strategies have been developed for both nonprecious-metal and noble metal SAC. (researchsquare.com)
  • Organometallic catalysts are an important means of providing new and highly efficient routes for chemical processes, and the development of new transition metal catalysts for promoting the synthesis of key compounds is a major goal in the development of synthetic routes with minimum energy use. (edu.au)
  • The work has provided new insights into highly accessible and efficient metal catalysts, including multimetallic systems. (edu.au)
  • Such stacked 2D materials are essential for the construction of future and very powerful electronic devices, while dense arrays of functional groups attached to a 2D material is a very interesting starting point for immobilization of homogeneous catalysts. (lu.se)
  • Heavy metals are found naturally in the earth, and become concentrated as a result of human activities, or, in some cases geochemical processes, such as accumulation in peat soils that are then released when drained for agriculture. (wikipedia.org)
  • acid rain can exacerbate this process by releasing heavy metals trapped in soils. (wikipedia.org)
  • It was determined that using of biosoild and supported tuff, allowed important immobilization of metals in polluted soils. (upt.ro)
  • Metal contamination of the soils is a widespread problem and immobilization of metals with organic amendments is one of the different remediation technologies. (upm.edu.my)
  • Rehabilitation of mine soils by phytostabilization: Does soil inoculation with microbial consortia stimulate Agrostis growth and metal(loid) immobilization? (inrae.fr)
  • Thus, metal transformation can be effectively decreased in the soil-plant environment by applying WB amendments. (metu.edu.tr)
  • Activated carbon was most effective in immobilization of Ni, Mn, Zn and Cu decreasing AB-DTPA extractable Ni in the soil, while Fe and Pb was increased due to application of other amendments. (upm.edu.my)
  • In situ amendments are a promising approach to enhance removal of metal contaminants from diverse environments including soil, groundwater and sediments. (stroudcenter.org)
  • Microbiological, molecular biological and chemical analyses were applied to investigate the role of these amendments in metal immobilization processes. (stroudcenter.org)
  • The amendments improved zinc immobilization in marine sediments that led to significant changes in the mineralogy: easily mobile Zn hydroxide phase was converted to an immobile Zn phosphate (hopeite). (stroudcenter.org)
  • Absorption through skin contact, for example from contact with soil, or metal containing toys and jewelry, is another potential source of heavy metal contamination. (wikipedia.org)
  • Here, the impact of wheat straw-derived biochar (300, 500, and 700 degrees C) on the immobilization and trans-formation of metals in the contaminated soil-plant system was assessed. (metu.edu.tr)
  • The characterization results indicated that high pyrolysis temperatures (300-700 degrees C) increased the carbon-containing groups with the potential to adsorb metals from the soil-plant environment. (metu.edu.tr)
  • The using of biosolid and of supported tuff for decreasing metals availability from soil polluted with waste mining was tested in this paper, by using of two grass plants, Medicago sativa and Festuca arundinaceea . (upt.ro)
  • We investigated the effect of activated carbon, poultry manure and pressmud on immobilization of nickel, manganese, copper, zinc, iron and lead in the contaminated soil, plant growth and metal concentrations in maize shoots. (upm.edu.my)
  • Metal(loid) soil pollution resulting from mining activities is an important issue that has negative effects on the environment (soil acidification, lack of vegetation, groundwater pollution) and human health (cancer, chronic diseases). (inrae.fr)
  • In the context of a phytostabilization process for the bioremediation of a mine soil highly contaminated by arsenic (As) and lead (Pb), a pot experiment was set up to study the effect of plant sowing and microbial inoculation on soil properties, metal(loid) (im)mobilization in soil and accumulation in plant, and plant growth. (inrae.fr)
  • Agrostis was able to develop on the contaminated mine soil and immobilized metal(loid)s through metal(loid) accumulation in the roots. (inrae.fr)
  • All the treatments, except PS without MW increased soil pH above six resulting in the partial immobilization of the metals. (lu.se)
  • PM, MW + PS and MW + PM supported the highest microbial biomass and a similar community structure, related with the presence of high organic C concentrations and high pH, with immobilization of metals and increased soil quality. (lu.se)
  • PCM contributed to improved soil structure, increased recalcitrant organic C, and decreased metal mobility, with low stimulation of microbial growth. (lu.se)
  • Matter-tag : A universal immobilization platform for enzymes on polymers, metal. (rwth-aachen.de)
  • We have expertise in the synthesis and catalytic applications of ligands and metal complexes compatible with proteins, bioconjugation of small molecules to proteins, expression and purification of recombinant enzymes, enzyme engineering and enzyme immobilisation. (nottingham.ac.uk)
  • Melamine and TCT from the triazine family are used because of the ability to form hydrogen bonds, chelate with metals, and the interaction of π-π as an appropriate ligand for stabilizing metals on substrates. (sharif.edu)
  • Bagheri, S. Metal-ligand complexes in alkali-activated materials. (oulu.fi)
  • As in most heavy metals, any ligand with sulfhydryl group is vulnerable. (medscape.com)
  • Our research program has made contributions to the design of new metal complexes for promoting key chemical reactions, and to the development of new methodologies for catalysed synthetic routes including the fundamentally important C-X bond forming reactions and multistep reactions. (edu.au)
  • Following this, the authors present an overview of the various potential applications of fullerenes, including: anti HIV- protease activity, photodynamic DNA cleavage, free radical scavenger, antimicrobial action, fullerene-based photoelectric materials, catalytic properties of transition metal-fullerene complexes, and more. (novapublishers.com)
  • The atomically dispersed NiNx sites are tolerate with high Ni concentration, indicating that the random reactions or metal nanoparticle formation generally observed at high temperature were avoided. (researchsquare.com)
  • It has been well documented that the optical, electronic, and catalytic properties of metal nanoparticles are functions of nanoparticle size, shape, and crystal structure. (hindawi.com)
  • In addition to direct mangrove forests destruction, urbanization can also impact mangrove forests through the input of anthropogenic effluents, and specifically rainwater runoff enriched with trace metals (TM). (frontiersin.org)
  • The bioconcentration and translocation factors (BCF and TF) were less than 1, indicating that metal concentration was restricted to maize roots and translocation to shoots. (metu.edu.tr)
  • 0.001) affected shoot dry weight and concentrations of all metals in maize shoots as compared to the control. (upm.edu.my)
  • Examples of toxic heavy metals A toxic heavy metal is any relatively dense metal or metalloid that is noted for its potential toxicity, especially in environmental contexts. (wikipedia.org)
  • The toxic effects of arsenic, mercury, and lead were known to the ancients, but methodical studies of the toxicity of some heavy metals appear to date from only 1868. (wikipedia.org)
  • Some elements otherwise regarded as toxic heavy metals are essential, in small quantities, for human health. (wikipedia.org)
  • Toxic heavy metals can bioaccumulate in organisms as they are hard to metabolize. (wikipedia.org)
  • Broadly, long-term exposure to toxic heavy metals can have carcinogenic, central and peripheral nervous system, and circulatory effects. (wikipedia.org)
  • For humans, typical presentations associated with exposure to any of the "classical" toxic heavy metals, or chromium (another toxic heavy metal) or arsenic (a metalloid), are shown in the table. (wikipedia.org)
  • The beads, designated as BIO-FIX beads, have removed toxic metals from over 100 waters in laboratory tests. (cdc.gov)
  • In this book, authors present research on filamentous fungi and the way they impact and transform their microenvironment, thereby contributing to mobilization or immobilization of potentially toxic metals and metalloids. (novapublishers.com)
  • Cibacron blue F3GA incorporated immobilized metal chelate affinity sorbent as a high efficient affinity immobilization. (tbdb.org)
  • The self-immobilization of polymer onto titanized silica particles produces more homogeneous polymeric coatings and stationary phases without silanophilic activity. (scielo.br)
  • or by immobilization of pre-synthesized organic polymer onto chromatographic support particles. (scielo.br)
  • Polymer immobilization on the support surface is typically performed by a chemical process 11 11 Qin, Q. (scielo.br)
  • The mechanisms of these treatments on the polymer immobilization process is not yet well understood, although the resulting material typically has a thin polymer layer chemically bonded to some of the active sites of the chromatographic support, which results in good separations and high stability. (scielo.br)
  • Another possibility for preparation of the polymer-coated stationary phases with pre-synthesized polymers has been by the self-immobilization process. (scielo.br)
  • Apatite and chitin were selected and tested for copper, chromium, and zinc metal removal in marine sediment samples. (stroudcenter.org)
  • The ash collected by dust collector contains also, other than organic pollutants like polycyclic aromatic hydrocarbons, (PAHs), inorganic heavy metal pollutants, such as zinc, cobalt and lead. (ncl.edu.tw)
  • 77. Sebastijan Kovačič, Katharina Gruber, Bernd Fuchsbichler, Martin Schmuck, Christian Slugovc Macroporous carbon coatings through carbonization of emulsion-templated poly(dicyclopentadiene) on metal substrates , Monatsh. (tugraz.at)
  • Herein, by anchoring NiN x precursor (bis(ethylenediamine)nickel(II) chloride) on the surface of a layered metal-organic coordination compound, we demonstrated a facile strategy for large-scale production of single-sited NiN x with excellent electro-catalysis performance. (researchsquare.com)
  • 74. Tobias Burger, Miriam Velásquez Hernández, Carlos Carbonell, Johannes Rattenberger, Helmar Wiltsche, Paolo Falcaro, Christian Slugovc, and Sergey M. Borisov, Luminescent Porphyrinic Metal-Organic Frameworks for Oxygen Sensing: Correlation of Nanostructure and Sensitivity , ACS Appl. (tugraz.at)
  • The future directions of this research project goes towards stacked growth of other 2D materials as for example 2D transition metal disulfides and the growth from mass selected and charged fragments onto imprinted charge or defect patterns on 2D films. (lu.se)
  • Treatment depends on the type and severity of the fracture and may include pain relievers, PRICE (protection, rest, ice, compression, and elevation), maneuvers or procedures to move the fractured bone fragments back into their normal position (reduction), immobilization of the injured part (for example, with a cast or splint), and sometimes surgery. (msdmanuals.com)
  • The paper presents an original study on adsorption and aggregation phenomena in a mixed system consisting of a macromolecular compound, heavy metal ions and an innovative adsorbent. (mdpi.com)
  • Following the laboratory studies, cooperative field tests were conducted to evaluate the metal adsorption properties of the beads in column and low-maintenance circuits, determine bead stability in varied climatic situations, and demonstrate the beads' potential as a viable waste water treatment technique. (cdc.gov)
  • The beads exhibited excellent handling characteristics in both column and low-maintenance circuits, and continued to extract metal ions after repeated loading-elution cycles. (cdc.gov)
  • Chemical methods involving metal salt reduction in solution enjoy an extra edge over other protocols owing to their relative facileness and capability of controlling particle size along with the attribute of surface tailoring. (hindawi.com)
  • This has led to inclination of scientific community towards eco-friendly agents for the reduction of metal salts to form nanoparticles. (hindawi.com)
  • Many of these groups of bacteria have been shown to be involved in metal reduction and immobilization. (stroudcenter.org)
  • To overcome this burden, plants are potential candidates to remove pollutants through diverse biological mechanisms involving accumulation, immobilization, volatilization, and degradation. (mdpi.com)
  • 0.001) decreased ammonium bicarbonate-diethylene triamine penta acetic acid (AB-DTPA) extractable concentrations of metals except lead. (upm.edu.my)
  • Activated carbon treated pots had minimum AB-DTPA extractable concentrations of all the metals except iron and lead. (upm.edu.my)
  • The enzyme was found to be inactivated by the metal chelating agent, ethylene diamine tetracetate (EDTA) at 5 X 10-3 and 5 X 10-4 M concentrations. (who.int)
  • In this review, first various methods used to prepare metal nanoparticles are highlighted and further tannic acid mediated synthesis of metal nanoparticles is emphasized. (hindawi.com)
  • This developed increased interest of scientific community in the synthesis of metal nanoparticles of defined morphology. (hindawi.com)
  • Various procedures have been developed for the synthesis of metal nanoparticles and nanomaterials including physical, chemical, and biological methods. (hindawi.com)
  • 76. Efthymia Vakalopoulou, Daniel Knez, Marco Sigl, Gerald Kothleitner, Gregor Trimmel, Thomas Rath A Colloidal Synthesis Route Towards AgBiS 2 Nanocrystals Based on Metal Xanthate Precursors , ChemNanoMat 2023 , 9 , e202200414. (tugraz.at)
  • In adults with a radiological diagnosis of a displaced fracture of the distal clavicle that does not involve the acromioclavicular joint is sling immobilisation non-inferior to surgical fixation using a patient self-reported functional outcome at 12 months? (york.ac.uk)
  • Sling immobilization - upper limb support with a sling, typically for 2 to 4 weeks, followed by surgical fixation if symptomatic non-union of the fracture typically at the 3-month follow-up. (york.ac.uk)
  • 1, 2] Although most of these injuries can be managed nonoperatively with immobilization or controlled mobilization, surgical intervention may be required in some cases. (medscape.com)
  • Biosorption of metal contaminants using immobilized biomass - field studies. (cdc.gov)
  • The U.S. Bureau of Mines has developed porous beads containing immobilized biological materials such as sphagnum peat moss for extracting metal contaminants from waste waters. (cdc.gov)
  • In particular, noble-metal NP films have been extensively studied because of their versatility, chemical stability, and unique optical properties stemming from localized surface plasmon resonances, which lead to enormous local, nanoscale optical field enhancements. (nature.com)
  • Metal-binding promiscuity in artificial metalloenzyme design CURRENT OPINION IN CHEMICAL BIOLOGY. (nottingham.ac.uk)
  • Naked metal nanoparticles are synthesized by various physical and chemical methods. (hindawi.com)
  • Chemical analysis of pore and overlying water also demonstrated metal immobilization primarily under chitin treatments. (stroudcenter.org)
  • Synthetic Metals. (aau.dk)
  • Although outstanding performance and stability have been observed in thermal-catalysis and electro-catalysis, the tedious and costly synthetic process, low yield and active metal content still exist as the main obstacles for the large-scale application of SACs. (researchsquare.com)
  • In humans, heavy metal poisoning is generally treated by the administration of chelating agents. (wikipedia.org)
  • Lead is the most prevalent heavy metal contaminant. (wikipedia.org)
  • 2013. Open Journal of Metal, Heavy Metal Special Issue 3:51-61. (stroudcenter.org)
  • all that facilitated heavy metal immobilization and removal from marine sediments. (stroudcenter.org)
  • Under temperature of 1600 ℃part of the heavy metal is gasified and returned to waste gas and become collected dust and part of Silicon Dioxide and Magnesium Oxide are sintered into slag and turn the hazardous industrial waste into recycled industrial waste for further utilization, so that they may be disposed. (ncl.edu.tw)
  • A heavy metal, lead is ubiquitous in our environment but has no physiologic role in biological systems. (medscape.com)
  • have also reported a simple one-step method for synthesizing noble-metal NP-embedded free-standing PDMS composite films. (nature.com)
  • Triazine polymeric support increases the amount of nitrogen due to their high levels of nitrogen, which in turn reduces the amount of catalyst consumed and reduces metal waste and increases catalyst activate. (sharif.edu)
  • As a result, it is difficult to increase the content of active metal species in the catalyst. (researchsquare.com)
  • Elemental lead is a bluish-gray metal without characteristic taste or smell. (cdc.gov)
  • Lead is a bluish-gray metal with no characteristic taste or smell. (cdc.gov)
  • The various alternatives analyzed fall into two basic categories: Immobilization and Hybrid Approaches. (ieer.org)
  • The Immobilization approaches would encase the plutonium (after initial processing to render it into a suitable form - plutonium dioxide) in ceramic discs which would be placed in steel cans. (ieer.org)
  • Symptoms and effects can vary according to the metal or metal compound, and the dose involved. (wikipedia.org)
  • Tannic acid, a plant derived polyphenolic compound [ 11 ] (Figure 1 ), has also been exploited as a reductant of metal salt solutions. (hindawi.com)
  • Metal nanoparticles harbour numerous exceptional physiochemical properties absolutely different from those of bulk metal as a function of their extremely small size and large superficial area to volume. (hindawi.com)
  • The properties of the glaze have been well enumerated in 1857 by Michael Faraday in his revolutionary study "Experimental relations of gold (and other metals) to light" [ 3 , 5 ]. (hindawi.com)
  • In-situ amendment of apatite and chitin offers a great bioremediation potential for marine sediments contaminated with heavy metals. (stroudcenter.org)
  • The hybrid approach would use the immobilization process for a portion of the plutonium surplus and would manufacture the rest into nuclear power reactor fuel for use in a commercial nuclear reactor. (ieer.org)
  • estimated at 48%) including infection, plate breakage and refracture after metal removal. (york.ac.uk)
  • This may indicate that the removal of the metal in question by EDTA, causes an irreversible denaturation of the enzyme. (who.int)