Results 91 to 100 of about 46,783 (309)

Natural Aging of Biomaterials in Ambient and Physiological Environments

Advanced NanoBiomed Research, EarlyView.
Biomaterials used in biomedical applications can change their physical properties over time, even under ambient and physiological conditions. This review highlights key studies on the natural aging of materials ranging from soft hydrogels to metals and ceramics, emphasizing how time‐dependent changes influence function and performance.
Shuyu Zhang, Anne E. Staples
wiley   +1 more source

Environmental Risks and Sustainable Management Pathways for Used Lubricating Oils: A Structured Review with Conceptual Spill Risk Analysis

Recycling
Used lubricating oils (ULOs) represent one of the largest hazardous liquid waste streams globally and pose significant environmental risks if improperly managed.
Catherine Cabrera-Escobar, Juan Moreno-Gutiérrez, Rubén Rodríguez-Moreno, Emilio Pájaro-Velázquez, Fátima Calderay-Cayetano, Vanesa Durán-Grados   +5 more
doaj   +1 more source

The phase shift of an ultrasonic pulse at an oil layer and determination of film thickness [PDF]

, 2005
An ultrasonic pulse incident on a lubricating oil film in a machine element will be partially reflected and partially transmitted. The proportion of the wave amplitude reflected, termed the reflection coefficient, depends on the film thickness and the ...
Astridge D. G., B. W. Drinkwater, R. S. Dwyer-Joyce, S Kasolang, T Reddyhoff   +4 more
core   +1 more source

Design of Experiments‐Based Optimization of Recovered Carbon Black–Reinforced Isobutylene–Isoprene Rubber in Comparison With Conventional Carbon Black Systems

Journal of Applied Polymer Science, EarlyView.
Optimized potential of rCB via DOE: recovered carbon black from end‐of‐life tires was assessed as a full substitute for conventional carbon black in IIR composites. DOE and response surface methodology optimized rCB loading, plasticizer, and sulfur contents. Hardness showed linear trends, while rupture energy was nonlinear.
Vinícius Guedes Gobbi, Ester Costa de Almeida, Roberta Helena Mendonça, Marysilvia Ferreira da Costa   +3 more
wiley   +1 more source

Impact of Driving Cycles on Greenhouse Gas (GHG) Emissions, Global Warming Potential (GWP) and Fuel Economy for SI Car Real World Driving

, 2009
The transport sector is one of the major contributors to greenhouse gas emissions. This study investigated three greenhouse gases emitted from road transport: CO2, N2O and CH4 emissions as a function of engine warm up and driving cycles.
Andrews, GE, Bell, MC, Daham, BK, Li, H, Ropkins, K, Savvidis, D, Tate, JE   +6 more
core  

Considerations on the lubrication of spacecraft mechanisms [PDF]

, 1983
Space tribology and a number of precepts to guide designers in its application are discussed. Of the many techniques available all, without exception, have limitations in performance.
Briscoe, M., Todd, M. J.
core   +1 more source

Emerging research directions in nanoparticle‐based foam control for bioprocessing: a bibliometric approach

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract Overfoaming remains a critical challenge in industrial bioprocesses, compromising mass transfer, operational stability, and downstream efficiency in bioreactors and wastewater treatment systems. This study provides a bibliometric and scientometric assessment of nanoparticle‐enabled foam control to map technological trends and identify research
Antonio Átila Menezes Ferreira, John Hebert da Silva Felix, Thiago Queiroz da Silva, Larissa Oliveira Araújo, Maria Tayane Barroso dos Santos, Larysse Maria Santiago de Castro, José Cleiton Sousa dos Santos   +6 more
wiley   +1 more source

Used lubricating oils recycling using solvent extraction

Current World Environment, 2010
Huge amounts of used lubricating oils from automotive sources are disposed of as a harmful waste into the environment. For this reason, means to recover and reuse these wastes need to be found. Valuable lubricant could be recovered from disposed oil. More importantly, oil may be the most important factor to influence the shape of society in the 21st ...
Vineet Katiyar, Sattar Husain
openaire   +1 more source

Sustainable levulinic acid production from inulin via hydrothermal conversion

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract This study investigates the hydrothermal conversion of inulin using potassium pyrosulfate to levulinic acid (LA). The Box–Behnken design approach was applied to optimize the conversion parameters and analyze the interactions influencing LA yield.
Gwi‐Taek Jeong
wiley   +1 more source

Polymers additive for improving the flow properties of lubricating oil

Egyptian Journal of Petroleum, 2018
An investigation was conducted for the improvement of the physical properties of Lubricating oil. The copolymer used is ethylene propylene diene monomer (EPDM).
S.I. Shara, E.A. Eissa, J.S. Basta
doaj   +1 more source