Feulgen reaction, first described by Robert Feulgen, is one of the most commonly used cytochemical methods for semiquantitative DNA determination in histological and cytological samples. It is very important to determine the exact amount and status of the DNA of the nucleus in order to make a diagnosis and treat malignant tumours. The key parameter in the precise measuring of DNA is the reproducibility of the Feulgen reaction. If the instructions for use are followed correctly, reproducibility is easily and reliably achieved by using quality reagents found in BioGnost’s Feulgen kit. BioGnost’s Feulgen kit contains an additional contrasting reagent for cytoplasmic staining which enables clearer viewing of stained DNA. Using contrasting reagent is not necessary during the staining protocol, but it provides better contrast to the stained DNA of the section.
Five-reagent DNA staining kit according to Feulgen. For use in semiquantitative DNA determination in histological and cytological samples. The specimen is first treated with hydrochloric acid creating an aldehyde group of DNA that can be visualised by Schiff (BioSchiff) reagent. This reaction is specific for nuclear DNA.
Martius Scarlet Blue (MSB) kit
Seven-reagent kit used for fibrin visualisation, especially of older clusters. This method is a modification of Masson Trichrome and is ideal for studying connective tissue and vascular pathology.
TB-Stain Fluorescent Kit
Three-reagent kit for fluorescence-microscopic detection of acid-fast bacteria. Contains TB Auramine-Rhodamine reagent, double amount of TB Decolorizer Fluorescent and TB Permanganate reagent as counterstain.
4 x 100ml bottles.
BioGram ECO kit
Four-reagent phenol-free kit for the identification of bacteria according to Gram. Kit contains Gram Crystal violet, phenol free reagent, Gram Sodium hydrogencarbon, solution, stabilized Gram Lugol solution, double amount of Gram Decolorizer solution 2 and Gram Safranin solution as counterstain.
2×50 mL+4×100 mL bottles
TB-Stain Auramine O Kit
Three-reagent kit for staining acid-fast bacteria using fluorescence method. Contains TB Auramine O reagent, double amount of TB Decolorizer Fluorescent and counterstain of TB Permanganate reagent.
4 x 100ml bottles.