The Opentrons 24-well Aluminum Block can be placed directly on the OT-2/Opentrons Flex deck or on the Opentrons Temperature Module. This block acts as a 24 position rack to keep 2mL tubes, 1.5mL tubes, and the NEST 0.5mL tubes at constant temperature. The aluminum block holds temperatures between 4°C and 95°C when used with the Opentrons Temperature Module (GEN2).
The Opentrons 24-well Aluminum Block can be placed directly on the OT-2/Opentrons Flex deck or on the Opentrons Temperature Module. This block acts as a 24 position rack to keep 2mL tubes, 1.5mL tubes, and the NEST 0.5mL tubes at constant temperature. The aluminum block holds temperatures between 4°C and 95°C when used with the Opentrons Temperature Module (GEN2).
Intended Use
For the selective separation and enumeration of enterococci in food and water.
Principle and Interpretation
Tryptone and peptone are the sources of nitrogen and essential growth factors. Yeast extract acts as well nitrogenous compounds and additionally the vitamin B12 complex. Sodium azide acts largely inhibits the growth of gram-negative bacteria while sparing enterococci, staphylococci and streptococci. Ox bile inhibits most gram positives but not enterococci. Enterococci hydrolyse esculin to esculetin and dextrose, which reacts with ferric citrate producing a brownish black precipitate around the colonies. Tolerance to bile and the ability to hydrolyze esculin is the traditional and reliable test for the identification of enterococci. (4). Sodium chloride maintains the osmotic balance of the medium and Agar is the solidifying agent.
Formulation
| Ingredients | /liter |
| Tryptone | 17.0g |
| Ox bile | 10.0g |
| Yeast extract | 5.0g |
| Sodium chloride | 5.0g |
| Peptone | 3.0g |
| aesculin | 1.0g |
| Ferric ammonium citrate | 0.5g |
| Sodium azide | 0.15g |
| Agar | 15.0g |
| pH 7.1±0.1 at 25°C | |
Preparation
Weigh 56.6g of dry powder of this product, add 1 L of distilled water or deionized water, stir, heat and boil until completely dissolved, and sterilize at 121℃ for 15 min.
Quality Control
Cultural characteristics observed after incubation at 35-37°C for 20-24hours.
| Quality control strains | Growth | Colony color |
| Enterococcus faecalis ATCC29212 | PR≥0.7 | Brown-black halo |
| Escherichia coli ATCC25922 | inhibited | Absence of brown-black halo |
Sorage and Shelf Life
Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of 3 years.
Precautions
1. When weighing the dehydrated medium, please wear masks to avoid causing respiratory system discomfort
2. Keep container tightly closed after using to prevent clumping.
Waste Disposal
Microbiological contamination was disposed by autoclaving at 121°C for 30 minutes.
Intended Use For the selective separation and enumeration of enterococci in food and water. Principle and Interpretation Tryptone and peptone are the sources of nitrogen and essential grow……
Norgen’s Swab Collection and DNA Preservation System is designed for collection, ambient storage and transport of DNA from samples collected using a swab, including nasal, buccal, saliva, fecal, skin, surfaces, etc. The Swab Collection and DNA Preservation System contains Norgen’s Swab Preservative in a liquid format. The user simply collects the specimen using the provided swab, and then transfers the swab into the Swab Preservative. The Swab Preservative prevents the growth of Gram-negative and Gram-positive bacteria and fungi, and also inactivates viruses allowing the resulting non-infectious samples to be handled and shipped safely. In addition, the Swab Preservative eliminates the need to immediately process or freeze samples and allows the samples to be shipped to centralized testing facilities at ambient temperatures. The components of the Swab Preservative allow DNA samples to be stored at room temperature for over 2 years.
DNA Isolation from Preservative
Swab samples collected and preserved using Norgen’s Swab Collection and DNA Preservation System are compatible with most DNA isolation methods. Samples stored in the tubes have been used successfully with most of Norgen Biotek’s DNA isolation kits and reagents. An optimized isolation procedure is available as part of Norgen’s Microbiome DNA Isolation Kit (Cat. 64100).
Figure 1 / 4
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| Kit Specifications | |
| Volume of Preservative | 1.2 mL |
| Preservation Temperature | Room Temperature |
| Preservation time | 2 years at room temperature |
Shelf Life and Handling
When stored at room temperature, unused Norgen Swab Preservative Tubes are stable through to the collect-before date without any reduction in performance. Please see the device insert or tube label for collect-before date.
| Kit Components | Cat. 45690 (50 units) |
|---|---|
| Swab Collection and DNA Preservation Kit | 50 |
| Individually Wrapped Swabs | 50 |
| Product Insert | 1 |
DBCO-PEG4-alcohol is a PEG linker containing a DBCO moiety and a terminal primary hydroxyl group. The hydroxyl can react with a variety of functional groups and the hydrophilic PEG spacer arm can provide better solubility to labeled molecules. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
DBCO-PEG4-alcohol is a PEG linker containing a DBCO moiety and a terminal primary hydroxyl group. The hydroxyl can react with a variety of functional groups and the hydrophilic PEG spacer arm can provide better solubility to labeled molecules. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
