Organic Freeze
Organic Freeze
Can you freeze fresh organic produce, and will it stay fresh?
Well i’m starting an organic garden soon, when the season comes and I was wondering if I freeze my fresh organic produce, will it stay fresh longer so I can use it later?
yes you can freeze about anything you grow in your garden. It will not be fresh and you cannot use it as fresh but it will be edible and quite tasty. Different things require different freezing methods. berries need to be put in a single layer on a cookie sheet and put into the freezer to freeze before bagging.
Beans need blanching (immersed in boiling water for 30 seconds) as do eggplant.
Peppers can but cut to size and frozen
I would reccomend getting a good book on putting food by http://www.back40books.com has the largest selection of such books (and a lot on organic gardening too) I know of.
Your county extension people are also a gold mine of information on putting up food for the winter. look in the phone book under cooperative extension office
Organic Freeze
How Freeze Dried Coffee is Made
Although nobody would pretend that instant freeze dried coffee tastes as good as freshly prepared coffee from the bean there is no doubt it has a large market, both commercially and in the home.
It’s sheer convenience and ease of use is probably its main advantage and with the improvements of modern production processes the flavour of the final beverage has improved dramatically. Just add a spoonful of freeze dried coffee granules to a mug, add hot water and you can enjoy a decent cup of coffee.
We have all probably drunk freeze dried coffee at some stage, but what actually is it and how is it made?
Initially fresh brew coffee is made in the usual way using a very large industrial bulk brewer in which very hot water is passed though fresh coffee grounds in a filter system to produce the hot coffee liquor we are all familiar with.
This coffee liquor is then concentrated through a series of evaporators under vacuum where some of the aroma and flavour compounds are also removed and stored. This ensures that some of the flavour and aroma of the coffee that is lost during the freeze drying process can be ‘put-back’ into the final product just before packing.
The concentrated coffee liquor then moves on to the actual freeze-dry processing equipment. Here the coffee liquor is initially foamed and then frozen to a temperature of -450 degrees centigrade. It is then ground to the required particle size.
The ice crystals that formed in the freezing process from the water content in the beverage are then removed in a process called sublimation. Here the frozen granules are subjected to a high vacuum which results in much of the water ice content to be transformed directly into gas (without a liquid stage it would normally undergo) before being returned to room temperature.
The resulting freeze dried coffee typically contains just 3 to 5 percent water. The more volatile flavour and aroma compounds extracted at the initial brewing stage are then returned to the dried product just before packing.
A large quantity of used coffee grounds are produced at a typical freeze dried coffee factory during the process but these are put to good use. They are usually sold on as animal feed, compost or organic fuel.
Freeze dried coffee is considered to be of superior quality to spray dried coffee which is made by a different process. The spray dried production of coffee will be the subject of another article.
About the Author
For more information about coffee and coffee brewing equipment visit http://www.cafebar.co.uk
The molecular weight of an organic compound was determined by measuring the freezing point depression of a ben?
The molecular weight of an organic compound was determined by measuring the freezing point depression of a benzene solution. A 0.500 g sample was dissolved in 50.0 g of benzene, and the resulting depression was 0.42°C (kf(benzene) = 5.065oC/m). What is the approximate molecular weight of the compound?
0.42 = m x 5.065
m = 0.0829
0.0829 = moles solute / 0.050 Kg
moles solute =0.00415
MM = 0.500 g / 0.00415 =120.6 g/mol
Intro – RioLife Organic Acai Berry Health Food
