(TEM) Membrane filter

TEM membranes filter is a high-tech product

The precision filtration of fluids and gases in biotechnology, pharmacology, chemistry, microelectronics and other science and technology applications are ensured with our track membranes. The ranges of application of track membranes are extensive. The track membrane is a thin polymer film with through pores. Track membranes are made by irradiation of solid films with heavy elements ions and then etching their tracks until the through uniform pores are formed. Track membranes are stable to contacts with microorganisms. The geometry of their porous structure doesn’t change along with the ion strength of the medium being filtered. Thermal and chemical stability allows to sterilize membranes by all the known methods.

The track membrane filter are made of polyester(PET) or polycarbonate(PC) film from 10 up to 25 microns thickness contains a system of through pores.

The basic characteristics:

pores diameter: from 0,05 up to 5,0 microns
pores diameters' increment - 0,05 microns
porosity - up to 15 % of the membrane's filter surface area
number of pores on 1 cm2 of the surface : from 105 up to 3x109 cm-2
the form of pores: cylinder, cone and their modifications
pores location on the film's surface: perpendicular or angular
pores allocation on the membrane's surface: uniform or of given configuration

The membranes filter properties:

high filtration selectivity
biologically inert
radiation safe
smooth films' surface and pores' edges
low defects density
small dispersion of pores diameters

Methods of sterilization of the membranes filter:

boiling in water
autoclaving during 2 hours at 121,6°C
processing with ethylene oxide (gas)
0,5-5 % formalinum water solutions treatment
radioactive sterilization with g-rays or accelerated electrons

Applications:
Pharmacology

Solvents and mechanical impurities filtration
Air and steam cleaning in reactors and ferment reactors
Cleaning, concentrating and sterilization of medicine prepara

Industry

Different fluids, gases, water filtration
After compressor air filtration
Distilled and deionized water recirculation
Screen-vacuum isolation

Perfume manufacturing

Finishing filtration
Opalescence/particles removing and defecation
Terminating filters protection
Liposomic cosmetic forms manufacturing
Ethanol deordorization

Food industry

Finishing filtration of drinks, beer, vines
Diary industry
Vegetable oils manufacturing
Food ferments manufacturing
Fodder lysine and milk protein manufacturing
Sterilized fruits and vegetables storing
Liquid foodstuff sterilization

Medicine

Plasmapheresis
Donors' or immunized animals' blood fractionating and processing
Bacteriological and virus checking
Parenterally injected drug solutions filtration
Cytological examination diagnostics
Squirt nozzles
"Artificial skin" for burned patients

Biotechnology

Finishing pollutions removing
Blood lipids and derivatives removing
Brotein and enzymea solutions filtration
Cultural medium filtration
Biomass extracts filtration
Clearing of proteins and culture mediums for cultures of crates
Biomass detachment
Viruses removing off during the biological preparations manufacturing
Chromatographic systems protection

Electronics

Gaseous and fluid media filtration
Fine air cleaning
"Clean room" systems
Equipment's air supply filtration
Respirators for workpieces protection against aerosols exhaled by operators

Chemistry

Finishing filtration
Filtration of paints, lacquers, photographic emulsions, ink and stains, organic solvents, alcohol, ethers, plastics, technological water, etc.
Gas pipelines sterilization

Environment control

Natural and potable waters microbiological analysis
Bioplankton studies

APPLICATIONS

0.01 - 0.1 um: Most liposome extrusions (range 0.03 - 0.4um), Asbestos (water), Bacteria removal - Acholeplasma laidwaii, Removal of colloidal material from water, Mycoplasma removal, Tissue culture with collagen - skin graft, Virus filtration.
0.2um: General sterile filtration, sterile filtration of corrosive fluids, immunology, implant tissue and cell studies, air venting, aqueous fluids, air and gas sterilizing. FITC stain technique, Legionella pneumophilia - air conditioning water, DNA fragments filtration, phytoplankton, bacteria removal, deionized water-clinical laboratory Type 1 and for semiconductor industry using SEM analysis, and EPA leachate/toxicity testing.
0.4um: Sterility testing, pulp, paper-adsorbable organic halides-water (AOX), air (asbestos fibers, silica particles pollen), dewatering, purification of cellular suspensions and wine stabilization, immunology - tissue and cell stuides, forensic analysis (SEM), microscopic examination - samples, Water-pollution (Escherichia coli), trace metal analysis (USGS method), nitrates, nitrites, phosphates, and ammonia (low extractable), particle analysis of corrosive fluids, bacteria - Serratia marcescens, and cell culture.
0.6um: Particle analysis (corrosive fluids), analysis of wine, milk, cells and plasmapheresis.
0.8um: General air analysis (asbestos, Cadmium), sugar molds (food), gravimetric analysis, tissue culture partitioning, wine stabilization, alkaline elution (DNA).
1.0um: Serum pre-filtration, beer stabilization, ultracleaning (corrosive fluids), microfiltration (alcohol solutions), Giardia lamblia (removes most of them), red blood cells (RBC).
0.2-0.8um: EPA leachate/toxicity testing.
0.4-3.0um: Cell culture
0.6-1.0um: Plasmapheresis
2.0um: Chemotaxis, alkaline elution (DNA), red blood cells (RBC's).
3.0um: General microfiltration and clarification, cytological evaluation (cerebrospinal fluid), chemotaxis, red blood cells (RBC), microfiltration of corrosive fluids.
5.0um: Exfoliate cytology, chemotaxis, gravimetric analysis, Gairdia lamblia (3-5um) observation, canine heartworm microfilariae (dirofilaria immitis), erythrocyte deformability (4.7um), gross particulate analysis of corrosive fluids (oil, diesel, gas filtration).
8.0um: Cytology.
12.0um: Starch, Schistosoma haematobium.
0.4-3.0um: Cell culture.
8.0-14.0um: Larger bacteria, general clarification and pre-filtration of corrosive fluids, most acides, some ester photoresists, reagent grade chemicals and alcohol solutions.
10.0-12.0um: Human melonoma invasion study (cancer-tumors), leukocytes, metastasis tumor cells.
0.01-20um: Scanning electron microscopy (SEM).