select ROW_NUMBER() OVER (order by products.Porder,Pmakat ) as RowNumber, isnull(PWeight,0) as PWeight, isnull(Pscreen,0) as Pscreen,isnull(Pmemory,0)as Pmemory,isnull(Pdisk,0)as Pdisk,Pname,PnameEN,PID,Pmakat,Pprice,PCprice,POprice from [productsView] as products where (Ponline = 1) AND PID IN (Select PID from productCategory where PcatID in(1044)) ORDER BY Porder,Pmakat
|
Freeze Dryers
|
|
Freeze-drying, also known as lyophilisation, lyophilization, or cryodesiccation, is a dehydration process typically used to preserve a perishable material or make the material more convenient for transport. Freeze-drying works by freezing the material and then reducing the surrounding pressure to allow the frozen water in the material to sublimate directly from the solid phase to the gas phase.
|
Here
are four stages in the complete drying process:
pretreatment,
freezing, primary drying, and secondary drying.
Applications of freeze-drying
·
Food industry-Freeze-drying is used to preserve food, the resulting
product being very lightweight.
·
Technological industry-In chemical synthesis, products are often
freeze-dried to make them more stable, or easier
to dissolve in water for subsequent use.
·
Document Conservation -freeze-drying can use as a recovery method of
water-damaged books and documents.
·
In bacteriology freeze-drying is used to conserve special strains.
·
Advanced ceramics processes sometimes use freeze-drying to create a
formable powder from a sprayed slurry mist
·
Floral preservation- Wedding bouquet preservation
Types of Freeze-dryers 
|