Yes, ethyl alcohol (95% grain alcohol) is commonly used in herbal extracts not just as a solvent, but to prevent molds and bacteria from forming. In the case of specific foods, I'm unaware of any, but citric acid, potassium sorbate, salt, sorbic acid and even ascorbic acid (Vitamin C) are used to prevent the re-fermentation of wines, to stop the browning of a recently cut banana or apple.
It is not a fact that more foods were preserved in the past. More foods are actually preserved now due to advanced canning and packaging techniques.
Food that is not preserved by canning, dehydration, freezing or smoking.
Foods usually found in jars include pickled items, jams, jellies, peanut butter, marshmallow fluff. Anything that can be preserved through canning can be preserved in jars.
All fruits and vegetables can be preserved by canning.
Yes. While some nurients may be lost in preserving, most are still there. Preserving could be canning, freezing, or drying foods.
Some examples of preserved foods are pickled onions, salted cod, frozen chicken, tinned sweetcorn, dried apricots, pickles, beef jerky, and strawberry jam.
less chemicals in the process
Foods are preserved in friges baggies and or plastic containers.
Food is preserved by curing with salt, smoking, pickling, drying, or canning.
Food can be preserved by refrigeration, freezing, canning, and drying.
Water bath canning and pressure canning are two methods used to preserve food. Water bath canning is suitable for high-acid foods like fruits and pickles, while pressure canning is necessary for low-acid foods like vegetables and meats. Water bath canning uses boiling water to create a seal, while pressure canning uses high pressure to kill bacteria. Pressure canning is more effective at preserving a wider range of foods and ensuring safety.
There are lots of food products that contain preservatives: nearly everything manufactured or processed has preservatives in them. Raw fruit and vegetables and fresh-caught fish have no preservatives. Butchers can sell you meats without preservatives.