Category "chemistry"

What factors affect collagen to gelatin conversion?

I have a bunch of oxtails I've been braising for hours in an adobo sauce and they remain awfully tough. What I'd love to see happen is for that abundant connect

Why does salt prevent soy milk from curdling in hot coffee?

As many people have experienced, soy milk will often curdle in hot coffee. I've experienced this myself with both instant and fresh coffee, and with my homemade

What determines the 'saltiness' of salt?

I've bought two brands of salt that are completely different in terms of 'salt' concentration(not sure if this is the correct terminology). I realized this beca

How can I clean these brown iron stains in my pot?

I use a big aluminium pot to boil water. I think the water contains iron because after 4-6 months, the inside of the pot is full of brown stains. The colour is

what makes red tomato sauce turn orange in colour?

I have noticed that tomato sauce (having started with deep red tomatoes) can turn orange. The colour change isn't from mixing in an ingredient of different col

How can I tell which fruits etc. contain proteases?

After my second attempt at making a ginger mousse with gelatin and finding that it fails, I've discovered that fresh ginger contains a protease. I knew that pin

What can I do to prevent the gaseous side effect of sunchokes?

I'd love to eat sunchokes (aka Jerusalem artichokes or topinambour) more frequently, but the side effects (gas, abdominal discomfort) are a bummer. In a home ki

Estimating the fat content of homemade chicken foot gelatin

I recently simmered a pot of chicken feet (including skin) for the first time and made an astonishingly gelatinous gelatin. It's clearly suffused with chicken f

homemade mint extract

I've got some mint in the yard (I think it's apple mint, as the leaves are very fuzzy and rounded) from which I'd like to make mint extract. No specific use in

Food-safe rotary evaporator grease

For those of you who have rotary evaporators or other chemistry glassware in the kitchen, what do you use to grease the ground glass taper/ ball joints so that

Why does spinach lose its texture when cooked?

I know that cooking spinach until it loses its texture is called wilting, but what is the chemical process that is going on. It it losing moisture? If so why do

Why brewed coffee in a pot needs a lid?

Coffee in an electric drip brewer (a model like this) goes all murky brown and opaque very fast, when the pot is left without a lid. With lid, it stays transluc

The name or chemical compound responsible for a specific quality of some spices (numbness)

I'm putting together the results of a kitchen experiment and I'd like to be able to identify a phenomenon that I've noticed when using certain spices. I've felt

How can I get a syrupy "mouth-feel" in sugar-free syrup?

I viscerally hate low calorie sugar replacements - all of them, including Splenda (sucralose), except in one application. In my iced coffee I like sugar-free ha

What happens with bread at >= 94˚C/201˚F? Or: Is temperature a reliable indicator of doneness?

So I baked a rye bread last night (in a bread pan). It was a new recipe for me and I had to adjust some things in it due to missing ingredients, so I could not

How long is garlic butter safe, and why is it not a botulism risk like garlic in oil?

I've been making garlic butter for years, storing it for months at a time. When I read that garlic-in-oil can grow dangerous amounts of botulinum toxins after s

How deeply will the flavors in a brine penetrate chicken?

I'm not asking about salt or "juiciness". I think there is enough evidence here and elsewhere to answer that question with "pretty deep, or all the way to the b

Create hot "sauce" from capsaicin extract

There are a lot of hot sauces like "Blairs Mega Death" with more than 500.000 scoville heat units. However, they do have some odd taste, which I don't really li

How does hydration of a sourdough affect baking features?

Looking at different recipes for sourdough starters, there's everything from a mix as dry as cookie dough to as wet as gruel. In this (danish) recipe from the a

Vinegar in stock

One day I finished cooking a beef stock. When I poured the stock into a glass bowl and added some vinegar, a cloudy precipitate formed and remained suspended in