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Food Storage and Preservation

~1100 answered questions
Parent Category: Food & Cooking
Humans have been preserving food for thousands of years, even before the advent of the modern refrigerator. Some methods include: drying, freezing, pasteurizing, canning and pickling among many others. Ask questions about food preservation here.
BHT, or butylated hydroxytoluene, is an antioxidant that may be used to extend the shelf life of foods. It is arguably carcinogenic.
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Yeasts are used to change sugar into alcohol and carbon dioxide andthis process is known as Fermentation. Wine and beer are also made this way. Beer is produced by fermenting germinating cereals , while wine is produced by fermenting crushed grapes. Yeasts are also used to ferment bread and cause it…
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There are several different techniques used to ferment foods. These techniques include aging, using brine, and applying molds or active bacteria.
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When to Change Deep Frier Oil When the oil starts to change to a darker color "almost caramel like" and smells somewhat "burnt" when its not in use, it is time to be changed.
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we can check it through seen the results of our fermentation.
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Pickling There are pickles, onions, peppers and other foods that are pickled: they are stored in a vinegar brine for a long time. Chilling and Freezing Lots of foods that used to be considered short term are preserved in a refrigerator or a freezer, like milk and other dairy products. Lots of…
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If kept well hydrated a well fed person can go without food for 30-40 days before severe symptoms (other than hunger) set in. Evidence from hunger strikers suggests that death starts to occur between 45 to 60 days. This can vary depending on how much energy the person has stored at the outset and ot…
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Offal is the edible entrails left over after an animal is butchered. Offal must be chilled immediately and then frozen if not cooked immediately. The Offal can remain in the freezer at -18C for 4 months.
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Most foods should be safe for 3 - 5 days if stored in the refrigerator.
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Plastic wrap like saran wrap is made from polyvinylidene chloride (PVDC) that has plasticizers like DEHA added to it. It is characterized by having a high tensile strength -6.9 to 82.8 megapascals (MPa); caused by the coiling of the polymers; which adds to the clinginess of the material. The plastic…
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fermentation is the process in which cells realease energy through a process called anerobic respiration (with out oxygen). That in return produces ATP. our bodies use an immense amount of ATP to do our every day tasks.
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So it is protected from moisture and animals
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If it is wet cat food, then it will last for around three hours at the most, although personally wet cat food should not really be left out that long.Dry food can be left out most of the day, but even this can become stale if left out too long. It is always best to throw away old kibble and replace …
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Pyruvic acid + NADH and yeast
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The length of time a cheese can keep in your refrigerator will depend upon the packaging, previous handling and the type of cheese. Soft or fresh cheeses will not keep as long as aged and hard cheeses. Deli sliced cheese will be at their best only a few days. Unopened containers of commercially pa…
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Fermentation converts carbohydrates (such as sugars) into carbon dioxide and water, and also produces a modest amount of energy (as ATP).
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Fermentation occurs when there is no oxygen present.
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Preserving food increases the length of time that it can be stored. It may be stored at room temperature for longer periods of time providing the package is still sealed and hasn't been compromised. They keep longer!
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One AnswerKept refrigerated lemons should last a few weeks or a month or so. If your lemons came in a net, they should have a 'best before' date on the label.  Another AnswerOnce I tried an old recipe from my grandfather . Put one layer of sand then a layer of salt then a layer of lemons , and…
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fermentation process mainly divided into 3 steps 1)Upstream2)Fermentation3)Down streamin up stream- strain selection, isolation,preservation, media preparation, innoculum preparationin down stream process- filtration, cell distruption,protein purification, lyophilization and paking
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It regenerates NAD+ from NADH to keep glycolysis going in the absence of oxygen.
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cells ferment to give you energy when you dont have enough
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Swine Flu? Pig Pox? No, really, "cured" means it won't rot. Not soon, anyways. Seriously, there is a potential for a parasitic infection called Trichinosis, which can be carried in pork. All pork and ham products should always be fully cooked before eaten.
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That really does depend upon the particular food in the can, tin coating (if any), and proper sealing-processing-handling-shipping-storage. Many canned food items will remain good - even 1-3 years after the labeled expiration, although the quality will likely degrade.
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3-5 days. However, if you freeze it it will keep in the freezer for about a month.
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not long perhaps 23 days
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it is a closed system, were no new nutrients are added. the bacteria grow and mutiply. they bacteria go throught the lag, and log phase into the stationay phase. at the same time the nutrients are depletitng. this eventually results in the bacteria entering the death phase maily due to lack of nutri…
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Lactic acid and co2/Depending on the basis of enzyme available; fermentation also results in the formation of Ethyl alchohol and CO2 if Zymase from yeast cells is available.
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the yeast eats the sugar and converts it to alcohol and carbon dioxide
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This could depend on a number of things, such as they age of the carrots when you purchased them and the manner in which they are stored. You can tell they are beginning to decline when they go soft and limp. When their skin becomes slimy, they are bad.
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i think its 48 hours
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Thought I would answer since I was searching for an answer. Some people said 4-5 days, but just ate mine from costco, 10 days old. It was still tasting great and my stomach is fine!Let me add my 2 cents:I have a slice of pecan pie that I left at work for at least a couple weeks. It was left in a tup…
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Pumpkin pie should be safe for 3 - 5 days if stored in the refrigerator.
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Set the temperature in a freezer below 32 degrees f.
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Vacuum packaging and MAP reduce the amount of available oxygen in the package which limits the growth of certain spoilage organisms. If the pH, moisture, and/or storage temps are not appropriate, these storage methods can set up the perfect conditions for the formation of botulinum toxin.
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Bags are filled with nitrogen, either pure or mixed with carbon dioxide, not so much to keep them inflated (that could be done with air), but to displace the oxygen, which would cause the oils to go rancid. Carbon dioxide is also used sometimes,
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0 Days. Dont trust the Chinese. Shouldn't have eaten it in the first place. Get to a hospital now.
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The answer is lactic acid, alcohol, and carbon dioxide.
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Foods are preserved in order to eat them at a later date without them spoiling.
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Answer The Chinese are thought to have invented ancient form of "ice cream" about 4,000 years ago, was brought to Europe in Italy.... but its nothing like it is today. Modern Ice Cream was first concieved by Englishwoman Mrs. Mary Eales... her Cookbook 'Mrs.Mary Eales's Receipts' 1718 is the 1st…
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The reason they do this is because of the plant's turgor pressure, which is the pressure of the cell's contents against its cell wall, determined by the water content from omosis. If there is more solute in the plant than in its surrounding environment than you have a hypotonic solution where water …
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Once cooked, beef chili will keep in the refrigerator for 3 to 4 days. Allow the chili to cool completely before placing in the fridge, ensuring that the lid is fitted tightly on the container.
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Some factors that affect chemical reaction in food preservation include acidity, temperature and humidity. Foods can stay longer when they are in low temperature areas such as a freezer.
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2 days if you dont count drinking ! :D x well thats how long i did dont know about anyone else lolx :)
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Tape popcorn around egg then pack with popcorn
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Most raw vegetables will be good for 3 - 5 days in the refrigerator. Some vegetables, such as carrots or celery, will be good for a week or more.
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Increased risk of gastric cancerRisk of botulism contamination- Foods fermented at home pose a risk of botulism contamination.you don't produce as much energy when you are fermenting, also typically fermentation has byproducts that can be poisonous if allowed to accumulate in large concentrations. T…
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Smoked salmon can be a delicious dish for anyone to enjoy. If you plan to can it in glass jars then you can expect it to last about 4 days.
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fermentation is used to convert sugar into alcohols...deriving energy from oxidation of organic compounds
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Fresh tomatoes might last a week. Home canned - about a year. Commercially canned - several years.
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no one really knows how long it lasts. So if i were you i would buy Hubba Bubba gum and time it with a timer. try doing it 3 times before deciding your final answer. It last up to 15-20 minutes you shouldn't buy it
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Ice cream's history goes way back, being credited to the Chinese in 3000 BC, though the variation used today was invented in Italy during the 17th century. However, the ice cream as the world knows it today wouldn't be complete without the ice cream cone, which wouldn't come until much later from th…
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Yes they can
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.1. The main use of sulphur is in the preparation of SO2 which is used in the manufacture of sulphuric acid. 2. Sulphur is used in the manufacture of carbon disulphate, sodium thiosulphate, gun powder, matches and in fireworks. 3. Sulphur is used on vulcanization of rubber. Natural rubber is soft an…
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Fermentation occurs when living cells present on the skin of fruit and vegetables break down the sugars inside. This fermentation causes a chemical change in the food which gives it a different taste.
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I don't think so, not unless it had moisture in it and got moldy at some point. My mom has a jar of cream of tarar that she has had since she got married (33 years ago)!
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Canning helps to preserve food by removing the air from the food. This causes the food to decompose much less quickly or not at all.
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16 oz = 1lb (pound) 68oz divided by 16oz per pound = 4.25 pounds or 4.25lb
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In the past, before refrigerators, it was the only way to store perishable foods. Also, when traveling in areas without food supplies (on land or certainly at sea), it was the only way to have meat, fish or some vegetables. The final reason is to be able to have foods that are out of season; for ins…
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no
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Most vinegars have a nearly indefinite shelf life. If stored airtight, in a dry and cool place. You may notice that some vinegars, after long periods of time, get a sediment of sorts on the bottom or changes color. That is normal and the vinegar is fine.
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Tahini and sesame paste are a paste of ground sesame seeds that can be eaten uncooked, or, alternatively, used in cooking. It is a key ingredient in dishes such as hummus, various Asian dishes, halva, etc. It can also be eaten as a side dish or as a garnish, usually including lemon juice, salt and g…
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Fresh fruit, and other fresh produce such as tomatoes, celery, cucumbers, and lettuce.
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mi NH know a muss smth u put Inna food
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the process z used in making alchol
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Depends a little bit on what's in it. Cut up tomatoes will make it wet and shorten the time. Some ingredients (like sliced raw mushrooms) can get a bit mushy. But if you make a crisp green salad with everything very fresh--say, lettuce and raw spinach, cucumbers, bell peppers, carrot slivers, chopp…
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about an hour of straight chewing at least in spirement
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I think it's to preserve it.
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That is approximately 1.5 cups
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Potentially hazardous food should not be left unrefrigerated for more than two hours. Less time is better, especially if the ambient temperature is around 90°F - then reduce that to one hour. Then it should either be reheated or refrigerated.
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Modern ice cream was probably invented in either England or the US in the 18th century. Frozen fruit juices (sorbets), or crushed/shaved ice mixed with fruit juices (sno-cones, basically) date back over 2000 years, and most probably were originally developed somewhere in the "cradle of civilization"…
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There are 8 ounces in 1 cup, so 1 ounce is 1/8 cup. So 1/8 cups make an ounce.
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The rate of fermentation for various food materials vary. This depends with the availability of yeast. Foods that are composed of yeast ferment faster.
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According to USDA's FSIS, refreezing meat can be done if the thawed meat has been handled properly. Since there will likely be a degradation of quality, you should not make it a general practice. See Related Links. of course! you can refreeze almost anything!
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Big organic compounds break into small ones under the catalytic influence of complex substances called ferments... the common ferments are yeast and bacteria... examples of fermentation are brewing of wine and churning of curd....
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I just inherited beer from 2002, some of it was Sam Adams, some Budlight, and some MGD. I just had a sam Adams and it was fine. I think it helped that all these years this beer was just sitting in the fridge. I know beer gets bad when it is sitting in sunlight or if it goes through multiple heating …
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Franchises are considered commercial food service depots. The same can be said for restaurants, along with catering and buffet halls. The commercial food service industry has also expanded in recent years. This is due to new establishments that have been opened across the nation.
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It's because you chew all the flavor out of it! When gum is chewed it loses it's flavor so unless you get 5 gum, it runs out too fast!
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Microbial (yeast, mould, bacteria), Autolysis (enzymes or oxidation), Low temperature injury (e.g. freezer burn) and infestations of insects.
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Which of the following is used as a food preservative
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For home canned foods, figure on one year for the best quality. That should take you from harvest to harvest. Make sure the goods are properly stored - cool, dry and no sunlight:
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dried mangoes, sardines, jam
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Real whipped cream will melt. Foods that are left out in room temperature for more than an hour can begin bacteria growth. Our stomach acids can kill some of these bacterias but not all and some can make you very sick. Keep foods OUT of the danger zone- Above 40 degrees and Below 140 degrees. Betwee…
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The limit is anyhing less then 0.1% by weight..
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Lecithin Helps keep bread fresher longer and works with the gluten to make a lighter bread. It also helps make the bread moister and acts as a mild preservative. Made from soy or egg yolks. Comes in liquid or granular form. Use: 1 Tablespoon per cup of flour  Non-Diastatic Malt Super food …
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Refrigerated and treated with vinegar should last a few months with the correct conditions.
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Yes, it goes bad. Coffee is a time sensitive product that will oxidize and go stale. Several things will accelerate the process. Direct light, heat, refrigeration and air to name a few. Keep your coffee sealed in an airtight container, and in a dark, cool place. -- There are ways to age coffee. It…
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Money, Materials, Method, Man
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yeast respire anaerobically and change sugar (glucose) into alcohol and carbondioxide
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Raw meat should be refrigerated as soon as possible. It shouldn't be out of the cold for over an hour or so. Cooked meat should be removed from the bone and refrigerated within two hours.
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betch fermenters and continuous fermenters
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Salt has been used as a food preservative for thousands of years, so it will keep indefinitely unless it is contaminated with foreign substances or gets wet and/or hardens. Kept clean and dry it will keep indefinitely. You can keep salt dry from humidity by putting a few grains of uncooked rice in s…
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Alchoholic fermentation and Lactic Acid fermentation
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about one week is what most people will tell you , however i brought some a few years ago an kept them in my work van and ate on them for over 3 weeks. i did not get sick ,. if they start smelling or become slimey, throw them as far as you can out the window or simple put them in the garbage. i myse…
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