Results 1 to 10 of about 146,651 (191)

Bone weathering in a Mediterranean climate region: An experimental case study from Doñana National Park (Spain). [PDF]

open access: yesPLoS ONE
Bone weathering constitutes a highly informative and commonly studied variable in taphonomic analyses. Vertebrate paleontologists, zoo-archeologists and forensic anthropologists have used weathering as a taphonomic clock to ascertain the exposure time of
Marcos Pizarro-Monzo   +5 more
doaj   +2 more sources

Analysis of Changes in the Physical Properties and Structure of Poly(Oxymethylene) After Ageing in Natural Conditions and Accelerated by UVB-313 nm Radiation [PDF]

open access: yesArchives of Metallurgy and Materials, 2023
The paper presents the results of the analysis of physical phenomena associated with the degradation processes of the surface layer of polymeric materials.
A. Kalwik, P. Postawa
doaj   +1 more source

The effects of the weathering methods on the properties of the ABS, ASA and PMMA polymers

open access: yesPolymer Testing, 2022
In this study, the effects of natural and accelerated weathering methods on the mechanical and color properties of three commercially available thermoplastic polymers used in the automotive industry were investigated.
Fatma Filiz Yildirim   +2 more
doaj   +1 more source

Comparative evaluation of tensile strength, tear strength, color stability and hardness of conventional and 1% trisnorbornenylisobutyl polyhedralsilsesquioxane modified room temperature vulcanizing maxillofacial silicone after a six month artificial aging period

open access: yesThe Journal of Indian Prosthodontic Society, 2022
Aims: Silicone elastomers, chemically known as polydimethylsiloxane used in maxillofacial rehabilitation, over a period of time, undergo degradation and discoloration once aged, thereby reducing clinical longevity.
Drashti Sunil Gandhi, Rajesh Sethuraman
doaj   +1 more source

Impact of corona and radio-frequency plasma treatment on the degradation of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)

open access: yeseXPRESS Polymer Letters, 2022
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a polyester, produced naturally by microorganisms, with excellent biocompatibility. Corona and radio-frequency (RF) plasma treatment were applied in order to improve the degradation process of PHBV ...
Ana Antunes   +6 more
doaj   +1 more source

Impact of Natural Weathering on Stabilization of Heavy Metals (Cu, Zn, and Pb) in MSWI Bottom Ash

open access: yesApplied Sciences, 2022
Bottom ash (BA) is the main residue left by municipal solid waste incineration (MSWI). As the circular economy is strengthened, the use of BA in civil engineering is increasing, but its successful use is hampered by heavy metal leaching.
Saulius Vasarevičius   +2 more
doaj   +1 more source

Experimental study on soil-water characteristics and strength characteristics of complete-intense weathering mudstone in seasonal frozen area.

open access: yesPLoS ONE, 2023
To study the soil-water characteristics and shear strength of unsaturated complete-intense weathering mudstone, the soil-water characteristic curve of complete-intense weathering mudstone and the matric suction of mudstone samples under natural state ...
Haotian Guo   +4 more
doaj   +1 more source

On the Thermal Stresses Due to Weathering in Natural Stones

open access: yesApplied Sciences, 2021
Natural weathering is known as one of the key mechanisms causing degradation in building materials. Great efforts have been made to develop new materials and new processes for protecting those that already exist.
William Hideki Ito   +6 more
doaj   +1 more source

Effects of Natural Weathering on the Performance of High Solar Reflective Index Paint Surfaces Exposed in Harsh Climatic Conditions of United Arab Emirates

open access: yesBuildings, 2022
The solar reflective index (SRI) is one of the important parameters in the analysis of a building’s energy and thermal performance, especially for “cool” reflective paints or coatings and also for cool roof membranes.
Tirumala Uday Kumar Nutakki   +1 more
doaj   +1 more source

Investigating plywood behaviour in outdoor conditions [PDF]

open access: yes, 2016
Moisture behaviour of plywood is investigated in combination with detailed structural analysis. In the lab, neutron radiography and X-ray computed tomography (X-ray CT) were used to map the moisture distribution and internal structure of plywood ...
De Windt, Imke   +6 more
core   +2 more sources

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