Results 31 to 40 of about 471,885 (218)

Assessment of Coarse, Fine, and Ultrafine Particles in S-Bahn Trains and Underground Stations in Stuttgart

Atmosphere, 2022
The Stuttgart S-Bahn network comprises six subway lines and is used by approximately 425,000 people on a daily basis. In previous studies in other cities, it was found that subways can be a source and collection point of particulate matter (PM), which is
Abdul Samad, Kathryn Arango, Diego Alvarez Florez, Ioannis Chourdakis, Ulrich Vogt   +4 more
doaj   +1 more source

Synthesis of tert-amylbenzene for side-chain alkylation of cumene catalyzed by a solid superbase

Green Processing and Synthesis, 2021
The side-chain alkylation of cumene and ethylene over a solid superbase catalyst K/KOH/γ-Al2O3 is investigated. The effects of the reaction temperature, pressure, and time on the conversion of cumene and selectivity of tert-amylbenzene (TAB) are ...
Zhou Xin, Gao Ge, He Guangxiang, Guo Xiaoyan, Jin Haibo, Ma Lei   +5 more
doaj   +1 more source

Investigating a Low-Cost Dryer Designed for Low-Cost PM Sensors Measuring Ambient Air Quality

Sensors, 2021
Air pollution in urban areas is a huge concern that demands an efficient air quality control to ensure health quality standards. The hotspots can be located by increasing spatial distribution of ambient air quality monitoring for which the low-cost ...
Abdul Samad, Freddy Ernesto Melchor Mimiaga, Bernd Laquai, Ulrich Vogt   +3 more
doaj   +1 more source

Effects of maritime saline and humid environments on the characteristics of combustion dropping behavior of flexible polyurethane foam

Case Studies in Thermal Engineering
Flexible polyurethane foam (FPUF), a common combustible material in ship cabins, poses fire safety risks due to its molten droplet flow and dropping behavior.
Yangui Chen, Hongzhou He, Jieqing Zheng, Zhongqing Liu, Dimeng Lai   +4 more
doaj   +1 more source

Concept of Using an Unmanned Aerial Vehicle (UAV) for 3D Investigation of Air Quality in the Atmosphere—Example of Measurements Near a Roadside

Atmosphere, 2022
A substantial amount of air pollution is emitted from urban sources. Hence, investigating air pollutant dispersion from urban sources is of great importance. The mechanisms influencing air pollutant dispersion also need to be studied thoroughly. Unmanned
Abdul Samad, Diego Alvarez Florez, Ioannis Chourdakis, Ulrich Vogt   +3 more
doaj   +1 more source

Surface reconstruction regulation of catalysts for cathodic catalytic electrosynthesis

Applied Catalysis O: Open
Catalytic electrosynthesis powered by renewable energies shows potential to replace the traditional thermal catalysis due to low emissions, reduced energy consumption and enhanced safety. Cathodic reduction reactions can produce high-value chemicals such
Ye Zeng, Jia Liang, Weiwei Zhong, Guifang Li, Dingrong Deng, Xiaohong Fan, Qihui Wu   +6 more
doaj   +1 more source

An environmentally friendly acylation reaction of 2-methylnaphthalene in solvent-free condition in a micro-channel reactor

Green Processing and Synthesis, 2019
An efficient and solvent-free acylation of 2-methylnaphthalene (2-MN) is presented using acid chloride as both the acylating agent and solvent in a micro channel reactor.
Li Wenpeng, Jin Haibo, Yang Suohe, Guo Xiaoyan, He Guangxiang, Zhang Rongyue   +5 more
doaj   +1 more source

Carbon Nanotubes-Doped Metal Oxides and Metal Sulfides Heterostructure Achieves 3D Morphology Deposition of Li₂S and Stable Long-Cycle Lithium–Sulfur Batteries

Inorganics
The “shuttle effect” caused by the shuttling of soluble long-chain polysulfides between the anode and cathode electrodes has persistently hindered lithium–sulfur batteries (LSBs) from achieving stable and high-capacity performance.
Yu-Lin Luo, Hai Huang, Cheng-Wei Zhu, Wen-Qi Lv, Ye Zeng, Gui-Fang Li, Xiao-Hong Fan, Ding-Rong Deng, Qi-Hui Wu   +8 more
doaj   +1 more source

A comparison of wet manual cleaning processes to carbon dioxide cleaning processes in the semiconductor industry [PDF]

, 2001
Plan BThe purpose of the study was to analyze the risk exposures and costs involved in cleaning parts, equipment, and tooling in the semiconductor industry using wet manual processes and compare carbon dioxide as an alternative cleaning process.
Tourdot, Justin M.
core  

Influences of an Arrow’s Aerodynamic Pressure Center on Recurve Bow Shooting

Applied Sciences
An arrow’s attack angle continuously changes during its flight, which affects the position of the aerodynamic pressure center. To account for the offset between the aerodynamic pressure center and the center of mass of an arrow in recurve bow shooting ...
Wenfeng Shen, Liang Hu, Jing Hu, Yiming Xu, Xixia Xu, Jieqing Zheng   +5 more
doaj   +1 more source