| Preservation of bio-degradables is an
| |
| | moisture leads to deterioration after a
|
| important aspect. Traditionally Sun
| |
| | few years. Structural deterioration due
|
| drying of pulses and some vegetables
| |
| | to porous surface left behind by ice
|
| constituted preservation. Sunlight not
| |
| | crystals worsen the things.However, these
|
| only removed maximum moisture but also
| |
| | technical problems can be overcome by
|
| its UV rays killed micro organisms
| |
| | common table sugar which inhibits ice
|
| facilitating longer shelf life. An
| |
| | crystal growth as well as prevents
|
| advantage of Sun drying is that the
| |
| | denaturation.Brine shrimps, nematods,
|
| natural taste would return upon
| |
| | seeds are lyophilized(freeze dried) in
|
| reconstitution.Air and water tight
| |
| | presence of sugars to prevent complete
|
| packing in polyethylene/PVC lined
| |
| | desication. Structural decay may be taken
|
| aluminium foils and aluminium lined tetra
| |
| | care off by chemical fixatives like
|
| packs provide advanced protection from
| |
| | formaldehyde and glutaraldehyde and
|
| atmosphere. The sea food, meat, pulses
| |
| | storing in oxygen in water tight and air
|
| etc. can be packed with natural
| |
| | tight containers.The post production
|
| freshness. When stored in deep freezers,
| |
| | sterilization or autoclaving of
|
| these would retain their natural
| |
| | containers of injectables being not
|
| freshness for longer periods. One aspect
| |
| | possible in most cases, freeze drying
|
| to note with such packing was that
| |
| | comes to the rescue.The rise and fall of
|
| asceptic cleaning or sterilization was
| |
| | temperature and pressure being absent in
|
| difficult in large scale production.Food
| |
| | lyophilization, keeps the nature of
|
| grains, in large quantities may be
| |
| | fluids intact. The freeze dried products
|
| exposed to nuclear(gamma) radiation which
| |
| | can be stored at room temperature.The
|
| destroys micro organisms, germs and
| |
| | principle of freeze drying is
|
| rodents. Bhaba Atomic Research Center in
| |
| | sublimation. Meaning that, under low
|
| India has developed a technic for
| |
| | pressure(0.06 atm) or vacuum, solid water
|
| exposing the food to such radiations.
| |
| | converts directly to gaseous form.The
|
| This is now in effective use and is
| |
| | disadvantage with cryogenic preservation
|
| proven a boon for mass scale storage and
| |
| | is the enormous cost over long periods.
|
| longer shelf life.However human organs,
| |
| | But liquid nitrogen(cryogenics) has its
|
| corpses or dead pets etc. were stored in
| |
| | own advantage that it prevents frozen
|
| cryogenic state(upto -180 degree Celisus
| |
| | tissues from suffering from other water
|
| produced by LN2), a technique not
| |
| | and oxygen dependant deterioration.The
|
| suitable for vaccines.Freeze drying
| |
| | author Rajgopal has been writing on
|
| removes water content upto 98% (depending
| |
| | technical matters and in this avtar he
|
| on duration of freeze drying) while
| |
| | gave up tags that confine to particular
|
| retaining nature of ingredients.The
| |
| | genre of writing. Rajgopal is a
|
| argument against freeze drying is that it
| |
| | mechanical engineer and served the
|
| is destructive of tissue structure and
| |
| | pharmaceutical industry. Oflate he has
|
| leaves the dried food with a woody
| |
| | been putting his efforts in to creative
|
| texture formed due to ice crystal growth
| |
| | art and healthcare writing. Here he looks
|
| during freeze drying. The leftover
| |
| | in to the nostalgic aspect of humanity.
|
