Results 11 to 20 of about 1,679,071 (295)

Characterizing the Urban Mine—Challenges of Simplified Chemical Analysis of Anthropogenic Mineral Residues [PDF]

open access: yesResources, 2019
Anthropogenic mineral residues are characterized by their material complexity and heterogeneity, which pose challenges to the chemical analysis of multiple elements.
Paul Martin Mählitz   +8 more
doaj   +3 more sources

Effect of the Aggressive Environment on the Damage of a Glass Polyester Composite Developed by Hand Layup Process [PDF]

open access: yesAdvances in Materials Science and Engineering, 2015
This work treats the behavior of a glass fibre/unsaturated polyester (UP) composite with structural defects subjected to the attack of two corrosive solutions: H2SO4 and NaOH.
Nabila Belloul   +3 more
doaj   +3 more sources

The Effect of Functionalization Carbon Nanotubes (CNTs) on the Performance of PES-CNTs Mixed Matrix Membrane [PDF]

open access: yesInternational Journal of Science and Engineering, 2010
A new type of mixed matrix membrane consisting of functionalized carbon nanotubes (CNTs) and polyethersulfone (PES) is prepared for biogas purification.
Ahmad Mustafa   +3 more
doaj   +2 more sources

Characterization of Surface Modified Phoenix sp. Fibers for Composite Reinforcement

open access: yesJournal of Natural Fibers, 2021
This paper reports the morphological, physical, chemical, mechanical and thermal properties of untreated and various chemically treated natural fibers extracted from the petioles of the Phoenix sp. plants.
G. Rajeshkumar
doaj   +1 more source

Some insights into the reactivity of oxovanadium phosphate: synthesis and characterization of an VOPO4–H2N(CH2)3NH2 coordination compound [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
The lamellar matrix of VOPO4·2H2O was used as the host species to prepare a VOPO4–1,3-diaminopropane coordination compound. The oxovanadium matrix and the synthesized hybrid were characterized by elemental analysis, infared spectroscopy, thermogravimetry,
ROBSON F. DE FARIAS, CLAUDIO AIROLDI
doaj   +3 more sources

Dexamethasone-loaded zeolitic imidazolate frameworks nanocomposite hydrogel with antibacterial and anti-inflammatory effects for periodontitis treatment

open access: yesMaterials Today Bio, 2022
Periodontitis is a bacterial-induced, chronic inflammatory disease characterized by progressive destruction of tooth-supporting structures. Pathogenic bacteria residing in deep periodontal pockets after traditional manual debridement can still lead to ...
Ning Li   +8 more
doaj   +1 more source

Excitation-Emission Matrix Spectroscopy for Analysis of Chemical Composition of Combustion Generated Particulate Matter [PDF]

open access: yesEnvironmental Science & Technology, 2019
Analysis of particulate matter (PM) is critical for the assessment of human exposures to potentially harmful agents, notably combustion-generated PM; specifically polycyclic aromatic hydrocarbons (PAHs) found in them and associated with carcinogenic and mutagenic effects.
Gaurav Mahamuni   +7 more
openaire   +2 more sources

Tooth matrix analysis for biomonitoring of organic chemical exposure: Current status, challenges, and opportunities [PDF]

open access: yesEnvironmental Research, 2015
Epidemiological evidence supports associations between prenatal exposure to environmental organic chemicals and childhood health impairments. Unlike the common choice of biological matrices such as urine and blood that can be limited by short half-lives for some chemicals, teeth provide a stable repository for chemicals with half-life in the order of ...
Syam S, Andra   +2 more
openaire   +2 more sources

Environmental Impact Assessment of Granite and Marble stone quarries Using RIAM and Iranian Leopold Matrix Methods [PDF]

open access: yesPizhūhish dar Bihdāsht-i Muḥīṭ., 2020
Background and Aim:Regardless of the positive economic effects, the adverse environmental impacts of mines make it necessary to assess environmental impacts.
zohre rahnamabargard   +3 more
doaj   +1 more source

A Random Matrix Model for Color Superconductivity at Zero Chemical Potential [PDF]

open access: yes, 1999
We discuss random matrix models for the spontaneous breaking of both chiral and color symmetries at zero chemical potential and finite temperature. Exploring different Lorentz and gauge symmetric color structures of the random matrix interactions, we ...
A. Chodos   +31 more
core   +3 more sources

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