Frequently Asked Questions
Here is a link explaining common antibiotics and how they work in a media:
If you would like a specific grade of material in your product, please email
If you want to know the grades of the product you are currently using, please request a Certificate of Origin by emailingor contact a representative on LiveChat. The request may take 2–3 business days to complete.
We recommend following the storage condition as stated on the Certificate of Analysis or label. Other types of storage can cause decreased performance. Plates cannot be stored frozen but can be stored in the refrigerator without any harm to performance.
If it is not on the product page on the website, please alert a LiveChat representative, and we will add it for future reference. Additionally, the Safety Data Sheet will have the non-proprietary components and percentages listed in section 3.
Teknova also has a new optimized Media based on Neidhardt’s formulation:
Use of buffers allows reactions to be maintained at a fixed pH, which can be particularly helpful when mimicking biological conditions or processes. It is important, however, to recognize the fundamental limitations associated with buffers related to the Henderson-Hasselbalch equation, pKa values, and the buffering capacity of the species utilized. Parameters that may change the pH (even slightly) include temperature, ionic strength of additives, and dilution considerations. This intriguing topic has been reported on for decades, with the earliest discussion of dilution factors reported in 1954. Specific to the dilution of buffers with water, it has been shown that a 10-fold dilution of a phosphate buffer can change the pH by 0.3 units. These changes have also been studied for varying temperatures and ionic strength of competing species in the buffered solution.
Recommended thawing conditions include placing the broth in the refrigerator (~4°C) to thaw slowly overnight. Once thawed, invert the bottle 5x to ensure homogeneity of product prior to use.
Teknova charges its customers the actual shipping cost. There are no shipping surcharge or handling fees, unless your order requires dry ice or is considered hazardous (see Order Support for more information).
The total cost of your order will be the product cost plus tax plus the actual shipping cost. The Grand Total will be provided at the time of shipment.
For credit card purchases, Teknova pre-authorizes the cost of the product plus $125 for small orders or 25% of the product cost for large orders. The Grand Total actually processed on your credit card will normally be less than the pre-authorized amount. The Grand Total equals the product cost plus tax plus the actual shipping cost and will be determined at the time of shipment.
Until your products are carefully packed by our shipping associates and ready for shipment, Teknova does not have the exact size and weight of the shipment. The ‘authorized’ shipping cost is normally more than the ‘actual’ shipping cost. Teknova does not charge its customers any extra shipping or handling fees above the actual shipping costs charged by the carrier.