Oenolab Diagnostics

Reagents and analyzers for food and wine analysis

NUTRIENT PAD SETS

Nutrient Pad Sets (NPS) are sterile, dehydrated nutrient culture media, ready for immediate use after addition of 3.5mL sterile water.
The substrate of the NPS is made of a biologically inert cellulose cardboard that does bind the nutrient medium neither chemically nor physically. For this reason the nutrient components are completely available for the development of microorganisms. Therefore, generally better and faster growth can be achieved with NPS as compared to conventional agar media.
Our NPS are delivered in Petri dishes and with sterile, individual packed membranes. The diameter of the membranes is usually 50mm, but 47mm membranes are available on option.
The shelf life at ambient temperature is up to 2 years dependent on the grade.

1260 

NPS FOR DETECTION OF YEAST

Malt extract medium for the detection of yeast in wine
Saccharomyces, Zygosaccharomyces, Rhodotorula, Brettanomyces.
Membrane filter: Black with 0.6µm pore size.
Recommended incubation condition: 2-3 days at 25 °C, aerobic.

1230 

NPS FOR DETECTION OF BACTERIA

Improved tomato juice medium for the detection of bacteria in wine.
The growth of yeasts and mould is inhibited by Actidione (cycloheximide).
Detection of acetic bacteria under aerobic conditions.
Detection of lactic bacteria under anaerobic conditions.
Membrane filter: Green with 0.45µm pore size.
Recommended incubation condition: 2-5 days at 30°C.

1025 

NPS FOR DETECTION OF BRETTANOMYCES

For the detection of Brettanomyces yeasts from wine, by optical differentiation.
Brettanomyces yeasts form yellow to yellow-orange colonies with yellow halo. They are easy to differentiate from other yeasts, which grow as white to beige-colored colonies. Additionally the growth of other yeasts are inhibited to a large extend by Actidione (cycloheximid).
Membrane filter: Green with 0.45µm pore size.
Recommended incubation condition: 3-5 days at 30°C.

1095 

NPS FOR DETECTION OF WILD YEAST

Lysine medium. Only wild yeasts can use Lysine as sole source of nitrogen, while culture yeasts of genus Saccharomyces are not able to grow.
Wild yeasts form white to beige-coloured sometimes reddish (Rhodotorula) colonies.
Membrane filter: Green with 1.2µm pore size.
Recommended incubation condition: 2-5 days at 25-30°C.