Results 1 to 10 of about 3,642 (245)

Soft-Sensor for Class Prediction of the Percentage of Pentanes in Butane at a Debutanizer Column

open access: yesSensors, 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 ...
Iratxe Niño-Adan   +2 more
exaly   +3 more sources

Propellane-free access to bicyclo[1.1.1]pentanes [PDF]

open access: yesNature Communications
Bicyclo[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

The Formation of Small Amounts of Cyclopropane during Pulsed Pyrolysis of C4–C5 Acyclic Alkanes in the Adiabatic Compression Reactor

open access: yesReactions, 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
doaj   +1 more source

Direct catalytic asymmetric synthesis of α-chiral bicyclo[1.1.1]pentanes

open access: yesNature 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

open access: yesSensors, 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]

open access: yesAtmospheric 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

Research Influence оf Nitrogen оn Formation Condensate Loss During the Development оf the Chayandinskoye Field

open access: yesНаука. 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
doaj   +1 more source

Observed and simulated global distribution and budget of atmospheric C2-C5 alkanes [PDF]

open access: yesAtmospheric 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
doaj   +1 more source

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