Spectrophotometric study of ephedrine hydrochloride in drug using molecular absorption UV-Visible.

A simple, rapid, accurate, and sensitive UV-Visible spectrophotometric method has been developed to estimate ephedrine hydrochloride (Eph) in pharmaceutical drugs. This method is based on preparing chelate complex through the reaction between Eph and cobalt ion (Co (II)). Ephedrine identification is done as an Eph - Co (II) complex after extraction by chloroform at λ max 389 nm.

CO capturing methods: Chemical looping combustion (CLC) as a promising technique.

This reports recent advances on CO capturing methods, focusing on chemical looping combustion (CLC) as a promising technology to achieve this goal. Generally, there are three main methods to capture CO resulting from fossil fuel combustion: post-combustion, oxy-combustion, and pre-combustion. In CLC, which is either classified as a pre-combustion method or as the fourth capturing method, the solid oxygen carrier provides the oxygen needed for combustion.

Effect of COVID-19 on air quality and pollution in different countries.

Introduction: COVID-19 is a pandemic that affected humans' lives and activities through the year 2020 in a way that was not witnessed in recent years. Many governments declared a complete lockdown as a try to stop the transmission of the disease. This lockdown resulted in a good recovery in environmental health, where air pollutants levels dramatically decreased.

An in-situ DRIFTS study of acetone adsorption mechanism on TiO nanoparticles.

In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) has been used to investigate the adsorption and catalytic reaction of acetone on TiO surfaces. The adsorption of acetone has been investigated on hydrated (as-received from the provider) as well as dehydrated TiO nanoparticles. On both samples, acetone shows absorption bands results from the vibrational modes of acetone adsorbed molecules.