You can find answers here to your questions about Greiner Bio-One products.
The "FAQs" will help make your every day work with Greiner Bio-One products even easier. They describe the correct handling sequence and provide valuable tips on how to avoid mistakes.
Search specifically using the free text search function for the right answer to your question, or browse through the product categories for further information.
The FAQs page is constantly updated with your questions and answers from Greiner Bio-One product experts.
If you are unable to find an answer to your question, simply send it to us via this form.
You will be notified by e-mail as soon as the answer is posted online.
We're always happy to help.
Please select your topic
The 96 well µClear® microplates and 384 well µClear® microplates have a film thickness of 190 µm +/- 10 %.
In the 1536 well microplate with a transparent bottom (µClear®) the film thicknee is 75 µm +/- 10 %.
UV-Star® microplates generally have a film thickness of 135 µm +/- 10 µm.
It is not recommended to use cell culture treated plates (TC treated microplates / Cellstar® microplates) in ELISAs. The cell culture treatment (TC treatment) of polystyrene creates highly charged surfaces with high affinity to all kinds of polar proteins. Therefore, the non specific background in the cell culture treated microplates is hard to control. Additionally, the ability of our immunological products (Microlon®) to bind proteins consistently is constantly checked in our quality assurance laboratory by means of ELISA.
Microplates made out of polystyrene do not withstand the high temperatures of the autoclaving process (specified thermal stability of polystyrene = -20°C - + 60°C)
Microplates made out of polypropylene do have a higher temperature tolerance (specified temperature range of polypropylene = -196°C to + 121°C).
All microplates are intended for single use only and autoclaving is not recommended as autoclaving them can influence the tight physical dimensions and tolerances of the microplates.
However most of our microplates are also available in a sterile version and autoclaving is not necessary.
White microplates are usually used for luminescence measurements and black microplates for fluorescence measurements. The critical properties in these methods, such as background, autofluorescence or crosstalk are considerably improved by the use of black or white pigmented microplates.
96 well microplates are available with different well designs:
V-bottom: The V stands for the conically tapered well bottom. These microplates are ideally suited for applications in which the entire sample volume must be pipetted off.
U-bottom: The U describes the round bottom shape. U-bottom microplates are ideally suited for agglutination tests.
F-bottom: The F stands for the flat bottom of the wells. This well type is ideal for precise optical measurements. The measuring light source is not deflected by the well profile.
The µClear® microplates are clear bottom microplates with a thin polystyrene film bottom (190 µm +/- 20 µm for a 96 and 384 well formats and 75 µm +/- 10 µm for the 1536 well format).
Commonly, µClear® microplates are used in cell based assays as they allow the microscopic monitoring of the cell growth. Additionally µclear® microplates have increased sensitivity down to 340 nm due to a reduction in background in transmission measurements.
Yes! For the determination of nucleic acid and protein concentrations at 260 nm or 280 nm without background interference, the UVStar® microplates are an ideal alternative to expensive and fragile quartz glass microplates or cuvettes.
Different UVStar® microplates are available:
- Standard 96 well UVStar® microplates (Part. No. 655 801)
- Half Area 96 well UVStar® microplates (Part. No. 675 801)
- 384 well UVStar® microplates (Part. No. 781 801)
The microplate with Cat.-No. 784080 is a 384 well white Small Volume™, solid bottom, cell culture treated, sterile microplate with lid. The plate does not have a clear film as it is a solid bottom microplate. Small Volume™ microplates with a clear film bottom (µClear®) are available in the low base design (= references starting with 788 ...) E.g. Reference 788 093 = 384 well, white, Small Volume™, µClear®, cell culture treated, sterile microplate without lid.
The difference between Small Volume™ LoBase and Hi Base design is the height of the plate (Small Volume™ HiBase = 14.4 mm / Small Volume™ LoBase = 7.5 mm) and the position of the wells.
Customer Drawings of both plates can be downloaded from our webpage.
No, we do not have 48 well glass bottom plates in our product portfolio, but the following glass bottom plates (Sensoplates™ ) are available from Greiner Bio-One GmbH:
24 well glass bottom microplates
# 662892 24 well glass bottom microplates, lid, single wrapped
# 662896 24 well glass bottom microplates, no lid, single wrapped
96 well glass bottom microplates
# 655892 96 well glass bottom microplates, lid, sterile, single wrapped
# 655896 96 well glass bottom microplates, no lid, sterile, single wrapped
384 well glass bottom microplates
# 781892 384 well glass bottom microplates , lid, sterile, single wrapped
# 781896 384 well glass bottom microplates, no lid, sterile, single wrapped
# 781856 384 well glass bottom microplates, extra lobase, no lid, sterile, single wrapped
1536 well glassbottom microplates
# 783892 1536 well glass bottom microplates, lid, sterile, single wrapped
# 783896 1536 well glass bottom microplates, no lid, sterile, single wrapped
# 783856 1536 well glass bottom microplates, extra lobase, no lid, sterile, single wrapped
For 781 182 the recommended working volume is between 10 and 130 µl - depending upon the requirements and applications of the customer.
Detailed information about most products can be found in the customer drawings and technical data sheets on our website in the product catalog under the relevant part number.
Those products are sterilized by ionizing radiation with a Sterility Assurance Level (SAL) of 10-3. The validation of the irradiation dose is according to EN 552, ISO 11137, ANSI/AAMI ST31/ST32.
If sterility is not a requirement for the assay, the non treated med binding plates can be used.
If the assay should be run under sterile conditions, sterile plates should be used. If no special sterile microplate is listed in our product catalog, e.g. for the black or white solid bottom microplates, we recommend using the high binding plates as these plates are sterile as well due to the high binding treatment .
Swinging bucket rotor [x g]
Fixed angled rotor [x g]
15 ml, round bottom
15 ml, conical bottom
15 ml, conical bottom
50 ml, conical bottom, with skirt
50 ml, conical bottom
50 ml, conical bottom
|227 280, |
|50 ml, conical bottom||polypropylene||3.200||9.000|
The stated maximum RCF values are guidelines only, depending on a variety of factors such as rotor, temperature, density, pH and type of liquid. The suitability of tubes for a specific application using high centrifugation forces has to be tested.
The PET roller bottles CAN NOT be shipped by air. They are sensitive to changes in air pressure and may implode if the cabin loses pressure. The polystyrene bottles can be shipped by air.
Greiner Bio-One offers various products for tissue- and cell culture:
1. CELLSTAR® products: These products can be used for general tissue and cell culture. To facilitate cultivation of adherent cells a proprietary physical surface treatment is provided. These products are defined as TC-treated.
2. CELLCOAT® protein coated products: For the cultivation of sensitive cells as well as for specific experimental set-ups Greiner Bio-One is offering Protein-coated cell culture vessels. The surface of these vessels is coated with proteins of the extracellular matrix as well as with synthetic polypeptides. The following protein coatings are available:
- Collagen I
Yes, the low basic resistance of the membrane of ThinCertTM cell culture inserts guarantees their excellent performance in TEER measurements.
In many cases the best results for organotypic culture have been obtained with ThinCert™ cell culture inserts with 0.4 µm and 1.0 µm. In certain instances, 3.0 µm pores have been successfully applied.
Due to their low protein absorption, PET membranes are very well suited for transport studies. For this kind of application, the pores of the membrane must be small enough to prevent cells from membrane passage. ThinCert™ cell culture inserts with 0.4 and 1.0 µm pores meet this criterion. In general, membranes with a high pore density (translucent) give better results than membranes with a low pore density (transparent).
Bartholomé K, Rius M, Letschert K, Keller D, Timmer J, Keppler D. Kopplow K, Letschert K, Konig J, Walter B, Keppler D.
Data-Based Mathematical Modeling of Vectorial Transport across Double-Transfected Polarized Cells.
Drug Metab Dispos. 2007 Sep;35(9):1476-81.
Kopplow K, Letschert K, Konig J, Walter B, Keppler D.
Human hepatobiliary transport of organic anions analyzed by quadruple-transfected cells.
Mol Pharmacol. 2005 Oct;68(4):1031-8.
Epub 2005 Jul 26.
Letschert K, Faulstich H, Keller D, Keppler D.
Molecular characterization and inhibition of amanitin uptake into human hepatocytes.
Toxicol Sci. 2006 May;91(1):140-9. Epub 2006 Feb 22.
Letschert K, Komatsu M, Hummel-Eisenbeiss J, Keppler D.
Vectorial transport of the peptide CCK-8 by double-transfected MDCKII cells stably expressing the organic anion transporter OATP1B3 (OATP8) and the export pump ABCC2. J Pharmacol Exp Ther. 2005 May;313(2):549-56.
Epub 2005 Jan 21.
Mettlen M, Platek A, Van Der Smissen P, Carpentier S, Amyere M, Lanzetti L, de Diesbach P, Tyteca D, Courtoy PJ.
Src triggers circular ruffling and macropinocytosis at the apical surface of polarized MDCK cells.
Traffic. 2006 May;7(5):589-603.
The thickness of the membrane of ThinCertTM cell culture inserts is graduated according to the size of the integrated pores. It is: 22.6 µm for 0.4 µm pores, 22 µm for 1.0 µm pores, 20 µm for 3.0 µm pores and 15 µm for 8.0 µm pores.
Transparent membranes comprise a lower pore density as compared to translucent membranes. With the different pore densities, the optical appearance also changes. Transparent membranes are optimized for light microscopy.
- PET is well established as a substrate for cell cultures.
- PET is highly resistant against most organic solvents. When detached from the insert housing, the PET membrane does not curl. Due to high solvent resistance and anti-curling effects the membrane of ThinCert™ cell culture inserts is very well suited for subsequent processing, such as immunohistochemistry.
- PET exhibits a very low protein absorption. ThinCert™ cell culture inserts are therefore an excellent choice for transport and uptake studies.
The capillary pore membrane of ThinCert™ cell culture inserts is made of PET (Polyethylene therephthalate).
The hanging geometry of ThinCert™ cell culture inserts ensures that a distance is kept between the insert underside and the well bottom, thus avoiding any damage of cells in the lower compartment during co-culture experiments. Furthermore, spacers at the flanges of the insert avoid any unwanted contact between the insert and the wall of the well.
The large opening for accessibility to pipettes is located opposite of the broad flange of the cell culture insert.
The eccentric position of ThinCert™ cell culture inserts conveniently provides a large opening for accessibility to pipettes, thus allowing an easy exchange of culture medium.
The external dimensions comply with ANSI standards to render the flask suitable for use on a wide range of cell culture and liquid handling systems.
Poly-L- and Poly-D-Lysine are enantiomers and differ in the sterical assembly of the atoms in the molecule. Both coatings enhance adherence of cells in vitro. Poly-L-Lysine is different than Poly-D-Lysine in that it is degradable by cellular proteases.
Cat.-No. 633180 is a petri dish for bacteriology and is not suitable for cell culture. As this dish does not have a treated surface, cell adhesion is not possible. Furthermore, cell culture products like Cat. No. 633171 are sterile and are regularly checked on cytoxity, freedom of RNase, DNase and human DNA and endotoxin.
Download PDF: Quality Certificate
Cat.No. 675 098 can be delivered with a Poly-D-Lysine/ Poly-L-Lysine coating.
The minimum order amount is 32 pieces; delivery time is approximately 6 weeks.
Polypropylene has the distinction of high temperature, high mechanical and high chemical resistance.
Polystyrene is highly transparent and is therefore, suitable for several different applications in which good optics are essential.
Yes, our petri dishes for bacteriology, like Cat.No. 663 102 or 664 102, are not pyrogen free. Our CELLSTAR®cell culture dishes are non-pryogenic, e.g. Cat. No. 664 160 (100 x 20 mm). On the website or in the catalog, our non-pyrogenic products are marked with a symbol. The limit of detection for pyrogens is <= 0,06 EU/ml.
The compartmented Petri dish enables working with different Agar Systems.
Due to the heat resistance, the heavy version of the Petri Dish is suitable for applications with hot liquid agar.
The shelf life of Petri dishes includes 4 years for TC-treated variants and 5 years for sterile, but not treated Petri dishes. The shelf life date of the product is printed on the outer label of the carton (hourglass) and is also located for cell culture products on the bag of each product.
Yes, the thin-walled polystyrene is gas permeable.
The spectrophotometric range of the semi-micro and macro cuvettes made from polystyrol refers to 370 - 750 nm.
The Bayonet-cap can be opened by a short turn (1/3) of the cap, while the screw cap can be opened by a simple turn.
Two-position vent stopper fulfils two functions:
1.When attached lightly, this enables a uniform ventilation of the tube contents.
2.When attached firmly by pressing in the stopper further, an airtight closure of the tube is achieved.
The graduation of 15 ml- (177 xxx) and 50 ml-polypropylene tubes is precise in a tolerance range of +/- 2%.
Centrifuge tubes as well as other products of polystyrene are not autoclaveable. Polystyrene is resistant to temperatures between -20 °C and +60 °C. The integrity of Polystyrene products can not be assured when put into contact with high temperature (+120 °C) during the autoclaving process.
Yes, the following polycarbonate tubes are available:
|160 501||16,0 x 100 mm||12 ml||round bottom|
|172 501||16,5 x 103 mm||13 ml||conical bottom|
|169 501||16,0 x 152 mm||20 ml||round bottom|
Maximal centrifugation forces depend on the type of rotor and are specified as follows:
|Product Number||max. RCF Fixed Angle Rotor [g]||max. RCF Swinging Bucket Rotor [g]|
|15ml PP tube||188xxx||15.000||4.000|
|50ml PP tube||210xxx||11.500||2.800|
|50ml PP tube||227xxx||9.500||3.200|
Greiner Bio One does not offer a special rack for item 187262. It is recommended to use a standard tube rack for this product.
All laboratories which manipulate potentially hazardous biological agents and materials, and generate waste containing such agents are responsible for the separation, packaging and treatment of their laboratory waste prior to its removal and disposal.
Greiner Bio One as supplier of disposable plasticware, cannot indicate the appropriate waste disposable measures. The latter being dependent on the respective customer application and country-specific regulations. All Greiner plastic disposables are for single use only and cannot be recycled.
Please find below universal recommendations for biological waste disposal:
Biological waste includes:
- liquids such as used cell culturing media, supernatant, blood or blood fractions (serum), etc., which contain viable biological agents;
- materials considered pathological, including any part of the human body, tissues and bodily fluids, but excluding fluids, extracted teeth, hair, nail clippings and the like that are not infectious;
- any part of an animal infected [or suspected to be infected] with a communicable disease;
- non-sharp, solid laboratory waste (empty plastic cell culture flasks and petri dishes, empty plastic tubes, gloves, wrappers, absorbent tissues, etc.) which may be, or is known to be, contaminated with viable biological agents;
- all sharp and pointed items used in medical care, diagnosis, and research, including the manipulation and care of laboratory animals, which should be considered potentially infectious;
- laboratory glassware which is known or suspected to be contaminated with hazardous biological agents.
In addition to the general packaging requirements specific requirements for biological waste must be followed:
a) Liquids containing Biohazardous Agents
- Collect liquids in leak-proof containers such as flasks or bottles.
- Liquid waste containers designed to withstand autoclaving temperatures must be used when steam sterilization is utilized. To allow pressure equalization, they should not be sealed.
- Non-sharp, solid laboratory waste (empty plastic cell culture flasks and petri dishes, empty plastic tubes, gloves, wrappers, absorbent tissues, etc.) which may be, or is known to be, contaminated with viable biological agents should be collected in autoclavable bags.
c) Sterilization and Disinfection
- Autoclaving (steam sterilization) is the preferred (and generally regarded as the most reliable) method of sterilizing biological waste. Depending on the volume of waste to be sterilized, it may be necessary to extend the duration of exposure to high temperature steam under pressure.
- Steam sterilization is generally not recommended for laboratory waste contaminated with or containing a combination of viable biological agents and significant amounts of hazardous chemical or radioactive materials.
- Containers of liquid waste must be placed into an autoclavable tray or pan of sufficient capacity to contain all liquid in the event of vessel failure or breakage inside the autoclave chamber. Use extreme caution when handling autoclaved liquids since they are hot and may boil over.
- Autoclavable bags of solid waste should be closed but not sealed airtight to allow steam penetration before they are placed into the autoclave chamber.
The maximum centrifuge capacity of PP-tube Cat. No. 187 261 is:
- Swinging bucket rotor max. 4800 RCF
- Fixed-angle rotor max. 34000 RCF
Polypropylene tubes with the product number 188271 are UV-permeable. To store UV or light sensitive samples Greiner Bio-One offers "Light Protection Tubes".
It is not recommended to use cell culture treated plates (TC treated microplates / CELLSTAR® microplates) in ELISAs. The cell culture treatment (TC treatment) of polystyrene creates highly charged surfaces with high affinity to all kinds of polar proteins. Therefore, the non specific background in the cell culture treated microplates is hard to control. Additionally, the ability of our immunological products (MICROLON®) to bind proteins consistently and reproducibly is constantly checked in our quality assurance laboratory by means of ELISA.
High binding polystyrene surfaces are hydrophilised using a special method of physical treatment. They display a higher binding capacity for polar molecules.
The polystyrene surface of a medium binding microplate is more hydrophobic than the surface of a high binding microplate and is therefore better suited for non-polar molecules.
Greiner Bio-One offers microplates with two different F-Bottom formats - Standard F-Bottom and F-Bottom Chimney Well. Half Area is equal to the F-Bottom format. The smaller well size reduces the sample volume about 50%.
- Total Volume: 382 µl
- Working Volume: 25 - 340 µl
F-Bottom Chimney Well:
- Total Volume: 392 µl
- Working Volume: 25 - 340 µl
F-Bottom Half Area:
- Total Volume: 199 µl
- Working Volume: 15 - 175 µl
LUMITRAC™ are white microplates. FLUOTRAC™ stands for black microplates. As the assay was developed in white high binding plates (LUMITRAC™ 600, 96 well) our recommendation would be to switch to white 384 well LUMITRAC™ microplates. The LUMITRAC™ 600 plate with the part number # 781074 is a white 384 well high binding microplate we would recommend.
From the manufacturer’s perspective, our tubes are classified as in vitro diagnostic and therefore are not to be used for such a purpose. Any material from an in vitro diagnostic device must never be re-applied to the patient/ donor.
No longer than 1 minute. Placing the tourniquet on for longer than 1 minute can lead to changes in the concentration of coagulation protein in the plasma as well as platelet activation, which can result in erroneous coagulation results.
Sodium Citrate is the standard anticoagulant used for coagulation test tubes. The concentration is 0.109 mol/l (3.2%).
- Platelet rich plasma for thrombocyte function samples.
- Platelet poor plasma for the predominant number of plasmatic coagulation tests.These two test materials are unsuitable for freezing.
- Platelet free plasma has the same use as platelet poor plasma; As there are almost no thrombocytes contained in the sample, it can be used when freezing is intended.
In addition to buffered citrate solution, VACUETTE® CTAD Tubes contain theophylline, adenosine and dipyridamole.
9NC is the letter code for sodium citrate for coagulation tubes and it indicates there is a ratio of 1 part sodium citrate to 9 parts blood.
Collection of blood into CTAD Tubes is recommended for all tests in which it is important to avoid release of platelet factors between collection of blood and performance of the test.
The outside tube made of PET (polyethylenetherephthalate) plastic is optimal for the maintaining the vacuum. There is no special packaging necessary. The inner tube, made of PP (polypropylene), functions to prevent evaporation of liquids, and thus the sodium-citrate volume remains constant. There is minimal surface activation in VACUETTE® sandwich tubes because of the inner tube, which is made out of PP, this is the most suitable surface known for coagulation tests.
Yes, the sodium citrate tube can be used to get an accurate platelet count if a patient’s platelets clump in the EDTA tube. The platelet count from the sodium citrate tube should be multiplied by 1.1 to account for the different blood to additive ratio in the citrate tube.
Hemolyzed specimens should not be processed since there could be activation of the clotting factors. Lipaemic or icteric specimens may also interfere with the instrumentation's optical system affecting the coagulation specimen result.
There have been recent articles indicating that drawing a discard tube is not necessary before drawing the sodium citrate tube. In the CLSI coagulation document (H21-A5) it is still recommended that the citrate tube is the second or third tube drawn. However, in the CLSI guideline for Venipuncture Collection (H3-A6) it states that for routine PT and APTT, the first tube drawn may be used for testing. It is also important to ensure a discard tube is drawn when a safety blood collection set is used and only a citrate tube is ordered, as the tubing may contain up to 0.5 mL of air that will be drawn into the tube and displace blood volume.
Greiner Bio-One blood collection tubes should be stored at 4-25°C (39-77°F).
VACUETTE® Tubes are irradiated to achieve sterility. These tubes are sterile on the interior only. We cannot recommend re-sterilizing the tubes, primarily due to pressure changes that take place during the re-sterilization cycle. Our tubes are under a specific negative pressure. During the re-sterilization cycle, this negative pressure may be disrupted and therefore the tubes may not draw the proper blood volume.
No, GBO does not claim that any of the tubes are endotoxin free.
|Tube Type||Recommended g-force relative centrifugal force (rcf)||Time (min)|
|VACUETTE ® Serum Tubes / with Sep / with Beads||1800 - 2200 g||10-15|
|VACUETTE ® EDTA Tubes / with Sep||1800 - 2200 g||10-15|
|VACUETTE ® Heparin Plasma Tubes / with Sep||1800 - 2200 g||10-15|
|VACUETTE ® Glucose Tubes||1800 - 2200 g||10-15|
|VACUETTE ® Homocystein Detection Tubes||2000 - 2200 g||10|
|VACUETTE ® Coagulation Tubes|
|- Platelet tests (PRP)||150 g||5|
|- Routine tests (PPP)||1500 - 2000 g||10|
|- Preparation for deep freeze plasma (PFP)||2500 - 3000 g||20|
VACUETTE® Blood Collection Tubes are made from a special formulation of the plastic, polyethylenetherephthalate (PET). This special formulation is extremely strong, dimensionally stable, and resistant to chemicals and breakage.
The expiry date indicates the shelf life of the product as determined by functional testing. To ensure accurate draw and test reliability, tubes should not be used after the expiry date. Expiry dates (last day of the month indicated) are printed on every VACUETTE® Blood Collection Tube and packaging.
Yes, VACUETTE® Blood Collection Tubes have a sterile interior.
Centrifuge the tubes at 1.800-2200g for 10-15 minutes. Please note that centrifuges need some time to accelerate the rotor to up to 2200g. This acceleration time should be in addition to the 10-15 minutes. The yield of serum is best at temperatures between 20-22°C. Centrifugation at refrigerated temperatures (4°C) may result in partial or no movement of the gel. Set the temperature between 20-22°C. Please note that tubes stored under refrigerated conditions should be allowed to reach room temperature before blood collection.
Yes, the Greiner UV Star microplates (# 655801, # 675801 and # 781801) should be compatible with the Varioskan microplate reader as they have a uniform footprint which is conform to the American National Standard Institute (ANSI / SBS Standards 1-2004). Detailed customer drawings with all necessary dimensions for the setup of a new plate definition file can be downloaded from our website www.gbo.com/bioscience under the equivalent part number.
These are the PDF-files of the customer drawings:
The 96 well µClear®microplates and 384 well µClear®microplates have a film thickness of 190 µm +/- 10%. In the 1536 well microplate with a transparent bottom (µClear®) the film thickness is 75 µm +/- 10%. UV-Star® microplates generally have a film thickness of 135 µm +/- 10 µm.
Cat.No. 675 098 can be delivered with a Poly-D-Lysin/ Poly-L-Lysin coating.
The minimum order amount is 32 pieces, delivery time is approximately 6 weeks.