Results 1 to 10 of about 863 (146)
Soft-Sensor for Class Prediction of the Percentage of Pentanes in Butane at a Debutanizer Column
Sensors, 2021 Refineries are complex industrial systems that transform crude oil into more valuable subproducts. Due to the advances in sensors, easily measurable variables are continuously monitored and several data-driven soft-sensors are proposed to control the ...
Diana Manjarres +2 more
exaly +3 more sources
Practical synthesis of 3-Oxa/Aza-bicyclo[3.1.1]heptanes from 3-Oxa/Aza[3.1.1]propellanes [PDF]
Nature CommunicationsWhile bicyclo[1.1.1]pentanes (BCPs) and bicyclo[3.1.1]heptanes (BCHeps) serve as established 3D bioisosteres for para- and meta-substituted benzenes, accessible via ring-opening of their corresponding propellanes, the integration of heteroatoms into ...
Qin Jiang +11 more
doaj +2 more sources
Propellane-free access to bicyclo[1.1.1]pentanes [PDF]
Nature CommunicationsBicyclo[1.1.1]pentane (BCP) has emerged over the past decade as a valuable three-dimensional bioisostere for benzene, attracting considerable interest in pharmaceutical research for its ability to improve drug-like properties.
Chang Liu +5 more
doaj +2 more sources
Reactions, 2023 During high-temperature pulse pyrolysis of acyclic butanes and pentanes under adiabatic compression conditions, cyclopropane, a stressed cyclic hydrocarbon, was found among the reaction products in small quantities for the first time. The analysis of the
Igor V. Bilera
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Direct catalytic asymmetric synthesis of α-chiral bicyclo[1.1.1]pentanes
Nature Communications, 2021 Bicyclo[1.1.1]pentanes (BCPs) are important motifs in contemporary drug design, however, approaches to BCPs featuring adjacent stereocenters are rather limited. Here, the authors report a photo- and organocatalyzed asymmetric addition of simple aldehydes
Marie L. J. Wong +4 more
doaj +1 more source
Raman Natural Gas Analyzer: Effects of Composition on Measurement Precision
Sensors, 2022 Raman spectroscopy is a promising method for analyzing natural gas due to its high measurement speed and the potential to monitor all molecular components simultaneously.
Dmitry V. Petrov +3 more
doaj +1 more source
Tracking separate contributions of diesel and gasoline vehicles to roadside PM2.5 through online monitoring of volatile organic compounds and PM2.5 organic and elemental carbon: a 6-year study in Hong Kong [PDF]
Atmospheric Chemistry and Physics, 2020 Vehicular emissions contribute a significant portion to fine particulate matter (PM2.5) air pollution in urban areas. Knowledge of the relative contribution of gasoline- versus diesel-powered vehicles is highly relevant for policymaking, and yet there is
Y. K. Wong +6 more
doaj +1 more source
Наука. Инновации. Технологии, 2022 Introduction. Currently, when calculating reserves and designing the development of oil and gas condensate fields, the priority is to achieve the highest possible and economically viable condensate recovery factor.
R. K. Dobrolyubova +2 more
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Observed and simulated global distribution and budget of atmospheric C2-C5 alkanes [PDF]
Atmospheric Chemistry and Physics, 2010 The primary sources and atmospheric chemistry of C2-C5 alkanes were incorporated into the atmospheric chemistry general circulation model EMAC. Model output is compared with new observations from the NOAA/ESRL GMD Cooperative Air Sampling Network.
J. Lelieveld +7 more
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Atmosphere, 2020 The main objective of this work was to bring to date the exhaust and evaporative volatile organic compound (VOC) profiles from light-duty gasoline vehicles, carrying out a sampling and analysis campaign in two tunnels of Mexico City.
Violeta Mugica-Álvarez +7 more
doaj +1 more source