Results 11 to 20 of about 21,977 (237)

Thermal degradation of naturally aged NBR with time and temperature

open access: yesMaterials Research Express, 2022
Nitrile butadiene rubber (NBR) is a polymer widely used in pipe fittings as a sealing and damping element. The performance of the polymer materials degrades with time and temperature.
Syam Prasad Ammineni   +2 more
doaj   +2 more sources

Improved rapid gas decompression of novel NBR-CTS polymer blends [PDF]

open access: yesPolymer Testing
Nitrile rubber (NBR) and polysulfides are two classes of polymers known for their resistance against swelling when in direct contact with hydrocarbon-based oils and non-polar solvents.
Gina Butuc   +4 more
doaj   +2 more sources

UNMANNED AERIAL VEHICLES - APPLICATION, LEGAL REGULATIONS AND CHALLENGES [PDF]

open access: yesDefence Science Review, 2019
The advantages of unmanned systems, such as cheaper operation, greater safety, better performance in flight duration or their minimal impact on the natural environment, result in a systematic increase in their significance and development, compared to ...
Jacek Krawczyk, Marek Tomaszycki
doaj   +1 more source

Mapeo de la cicatriz pos-incendio forestal para la estimación de pérdidas potenciales del área de producción de pulpa de papel, Municipios de Yumbo, La Cumbre y Dagua (Valle del Cauca), año 2014

open access: yesEntorno Geografico, 2022
En este estudio se pretende determinar el área de afectación o cicatriz pos-incendio forestal sobre los cultivos de producción de pulpa de papel en los municipios de Yumbo, La Cumbre y Dagua a partir de imágenes Landsat 8.
Eduard Paz Zúñiga
doaj   +1 more source

Research on property variation and mechanism of NBR immersed in oil

open access: yesZhejiang dianli, 2023
Nitrile butadiene rubber (NBR) is a crucial sealing material for oil-immersed equipment, and its properties have a direct impact on the safe operation of equipment.
ZHOU Yutong   +5 more
doaj   +1 more source

Is positive income elasticity of demand really associated with normal goods?: revisiting the Slutsky equation and net benefit ratio [PDF]

open access: yesInternational Journal of Business and Development Studies, 2017
Incorporating a household’s net sale status into a rearranged Slutsky equation with combined ordinary and endowment income effects, this paper aims to reinterpret the income elasticity of demand in the case of buying and selling and to associate it with ...
M Bakhshoodeh
doaj   +1 more source

A systematic study of the effect of graphene oxide and reduced graphene oxide on the thermal degradation behavior of acrylonitrile-butadiene rubber in air and nitrogen media

open access: yesScientific African, 2023
Thermal degradation of acrylonitrile-butadiene rubber (NBR)-graphene oxide (GO)/reduced graphene Oxide (G) composites (NBR-GO/G) was studied in air O2(g) and nitrogen N2(g) media at ∼800°C, using Thermal Gravimetric Analysis (TGA/DTG).
Bismark Mensah   +4 more
doaj   +1 more source

Development of a method for transferring forest lands to forest cover lands by remote sensing methods [PDF]

open access: yesСибирский лесной журнал, 2019
Assessment of forest regeneration using remote sensing data is a priority scientific research topic worldwide today. Threshold values for successful reforestation can be defined using multi­temporal satellite scenes and indices for analysis of vegetation
A. A. Karpov   +4 more
doaj   +1 more source

Behavioral Reserve in Behavioral Variant Frontotemporal Dementia

open access: yesFrontiers in Aging Neuroscience, 2022
“Reserve” refers to the individual clinical differences in response to a neuropathological burden. We explored the behavioral reserve (BR) and associated neural substrates in 40 participants with behavioral variant frontotemporal dementia (bvFTD) who ...
Su Hong Kim   +17 more
doaj   +1 more source

High Efficient Grafting Polymerization of Styrene on Surface of NBR Latex and Physical Properties of NBR/NBR-g-PSt Composite [PDF]

open access: yesPolymer Journal, 2008
The grafting polymerization of styrene on the surface of commercial available vulcanized acrylonitrile butadiene rubber (NBR) latex was initiated by the heat decomposing cleavage of dormant groups of semipinacol (SP) immobilized firstly under UV irradiation. Extremely high grafting efficiency in the range from about 90% to nearly 100% could be achieved.
Qin Wang, Lianying Liu, Wantai Yang
openaire   +1 more source

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