Evolution of a gas injected in a liquid is analyzed using the example of the behavior of oxygen molecules in water in which bubbles of gas molecules grow slowly by attachment of gas molecules to bubbles, the bubbles then associate and finally flow up to the liquid–gas interface and pass into the gas phase.
Two methods are considered for gas injection in a liquid, insertion of individual molecules and injection of small gas bubbles via gas penetration through a porous material. The behavior of oxygen bubbles in water and growth of those bubbles is analyzed. Subsequently, these grown bubbles float up and disappear, or reach the water boundary as a result of turbulent motion of the liquid.
It is shown that measurement of the size distribution function of micron-size bubbles in various regions of the water container allows one to establish the flow current lines on the basis of the theory of bubble growth.Graphical abstract:Schematic diagram of energies of molecules in the gas phase, in bubbles and bound to solvent
Cannabis has an adverse effect on the ability to drive safely, therefore a rapid disposable test for Δ
-THC), the psychoactive component of cannabis, is highly desirabl ... more
Hydrazones and their metal
complexes were heavily studied due to their pharmacological applications such as antimicrobial, anticonvulsant analgesic, anti-inflammatory and anti-cancer agents. This work aims to synthesize and characterize novel complexes of VO ... more
Citrus fruits, which are cultivated worldwide, have been recognized as some of the most high-consumption fruits in terms of energy, nutrients and health supplements. What is more, a number of these
fruits have been used as traditional medicinal herbs to cure diseases in several Asian cou ... more
Both legitimate brewers and distillers - and authorities on the track of illicit alcohol from home stills - will soon have a helping hand. Measurement experts have unveiled a portable device to determine the strength of alcoholic drinks quickly and easily, almost anywhere. Published in the ... more
Watermelon juice can be a valuable source of biofuel. Researchers writing in BioMed Central's open access journal Biotechnology for Biofuels have shown that the juice of reject watermelons can be efficiently fermented into ethanol.
Wayne Fish worked with a team of researchers at the USDA-A ... more
The active ingredient in many insect repellents, deet, has been found to be toxic to the central nervous system. Researchers writing in BMC Biology say that more investigations are urgently needed to confirm or dismiss any potential neurotoxicity to humans, especially when deet-based repell ... more