In chemical engineering, the Fischer–Speier esterification shows incredible value for biofuel
production. However, the transformation suffers from challenges including necessary …

In order to accurately and conveniently measure temperature and water content in
bioethanol, a dual-function ratiometric luminescence sensor has been fabricated …

In this study an inexpensive near infrared light emitting diodes (NIR LEDs) photometer using
a webcam as a transmittance detector is proposed for the first time. As an illustrative …

The physicochemical properties of a substance, such as a fuel, can vary significantly with
composition. Determining these properties with ASTM standard methods is both expensive …

Abstract Catalysts containing Na and Ca compounds dispersed in a porous carbon support
were prepared by a wet chemical route followed by heat treatments and their catalytic …

Marijuana, a drug derived from the Cannabis sativa L. plant, is the world's most consumed
illicit drug. In this paper, a total of 156 marijuana samples seized in the state of Espírito …

Authentic and counterfeit Real banknotes (R $50 and R $100) were discriminated using
near infrared spectroscopy with a portable instrument associated with principal component …

Considering the great economic significance of Coffea arabica (arabica) associated with the
lower production cost of C. canephora (conilon), blends of these coffees are commercially …

In this work, it is proposed the one-voltammogram simultaneous determination of methanol
and ethanol in hydrated ethyl alcohol fuel (HEAF) samples by cyclic voltammetry and …

The transverse relaxation time (T 2), measured using a benchtop time-domain nuclear
magnetic resonance (TD-NMR) relaxometer, was evaluated as a potential analytical method …