If dichloromethane is swapped out and ethyl acetate is used in its place, the extracts then obtained would be highly anti-radical and would be more efficient than dichloromethane.
Since "like dissolves like," ethyl acetate is a polar molecule that works well as a solvent to extract the polar caffeine molecules from coffee beans. The ethyl acetate molecules bind to the caffeine molecules, which then move through the bean cells' cell membranes. After all, the ethanol:water (1:1) solvent combination has been demonstrated to be the best for recovering catechins and delivering extracts with the highest antiradical activity.
Dichloromethane is a volatile colourless liquid used as an organic solvent in many industries. One of its main application is that it used to extract caffeine because of its highly effective solvent nature. Because DCM is a non-polar solvent and caffeine is readily soluble in DCM, it can easily be extracted without losing its aroma.
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They wanted independance because they had different beliefs from the government.
Helmut is about to give a presentation to his class, but he's very nervous. He feels he might explode or pass out. When the members see Helmut in front of them, they are unlikely to be able to know how nervous he feels.
<h3 /><h3>How to make a good presentation</h3>
It is essential that the speaker is confident about what he will present to his audience, so it is ideal to carry out research on the topic, base his ideas on reliable sources and carry out his presentation in a safe way.
You can also use presentation support materials to generate more interaction, such as visual aids such as posters and slides to make the presentation more dynamic.
Nervousness during a presentation for many people is a common reaction, so the ideal is to consciously manage your anxiety, demonstrating to your audience your effort and knowledge about the topic.
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Answer:
People change their environments in order to avoid animal interaction s, natural disasters that could potentially harm the people and by human interference because of pollution that can affect the green house gases and later affect the environment .
Ig lol?
Answer: The correct answer is: To prevent the evolution of pathogenic bacteria resistant to all known antibiotics.
Explanation: Natural selection is a process by which a species adapts to the environment. The main purpose of evolutionary medicine is to understand the evolutionary origin of diseases to improve the treatment and care of patients.
