Linden Grain Medium is formulated to mimic the environment of acidic food products. It contains Yeast Extract and Ammonium Sulfate as primary sources of nitrogen, vitamins, and minerals. Glucose is included as a high-concentration energy source to promote the rapid proliferation of fermentative organisms. The medium is characterized by its low pH, which is adjusted to around 4.2. This acidity serves a dual purpose: it acts as a selective agent by inhibiting the growth of most common bacterial contaminants while providing the optimal conditions for acidophilic flora, such as Alicyclobacillus species and various fungal spoilers.
Advantages
- Specialized Selectivity: The naturally low pH inhibits non-target competitive flora, allowing for the specific detection of acid-tolerant spoilers.
- Optimized for the Beverage Industry: Excellent for quality control testing of fruit juices, sodas, and other acidic shelf-stable products.
- Versatile Recovery: Supports the growth of a broad spectrum of spoilage organisms, including acidophilic bacteria, yeasts, and filamentous fungi.
- Nutrient-Rich: The inclusion of yeast extract ensures that even fastidious acid-tolerant microbes have the growth factors necessary for detection.
- Clear Interpretation: Growth is easily identified by visible turbidity or pellicle formation in the broth.
Technical specifications
| Catalogue number |
2068 |
| Brand |
Condalab |
| Application |
Detection of spoilage organisms in acidic beverages |
| Typical Composition (g/L) |
Glucose (10.0); Yeast Extract (5.0); Ammonium Sulfate (2.0); Potassium Phosphate (2.0); Magnesium Sulfate (1.0); Sodium Chloride (1.0) |
| Final pH (at 25 °C) |
4.2 ± 0.2 |
| Preparation |
25.0 g/L |
| Storage Temperature |
2 – 25 °C |
Available packaging options
| 2068 |
500 g plastic bottle |
