The most familiar wine is beer, and one major feature of beer is foam (Beer Head). Well, what is the the beer foam? Why the same beer with different foam?

One of the most frequently mentioned odors in beer evaluation is dimethyl sulfide (DMS). DMS is a sulfur compound that is generally thought to give beer creamed corn or cooked vegetable characteristics. Most beer brewers know very well how to reduce the risk of DMS entering the beer, such as checkin

The main difference between stout and porter is that stout is a dark beer made with roasted malt or barley, while porter is a dark beer made with smoked malt. Both are brewed with hops, yeast and water.