| Abstract | Zadatak rada bio je ispitati antifungalni učinak Na-benzoata i K-sorbata na odabrane vrste plijesni:
Penicillium aurantiogriseum, P. expansum i P. italicum pri različitim pH vrijednostima. Natrijev benzoat
je konzervans koji se najviše koristi u proizvodnji gaziranih pića, voćnih sokova, marmelada,
ukiseljenog povrća, kiselih krastavaca i začina gdje je, zbog niske pH vrijednosti, moguć rast plijesni.
Kalijev sorbat se primarno koristi kao konzervans u proizvodnji hrane i pića. Djeluje inhibitorno na rast
plijesni i kvasaca u mnogim namirnicama kao što su sir, vino, jogurt, bezalkoholna pića, pekarski
proizvodi, itd. Prema dosadašnjim rezultatima eksperimenta, utvrđeno je kako se snižavanjem pH
vrijednosti i antifungalni učinak spojeva povećava. Oba spoja su podjednako učinkovita na odabrane
vrste plijesni, ali snižavanje pH s 4,4 na 4,16 pojačava učinak K-sorbata. Ispitana je inhibicija
linearnog rasta kolonija plijesni pri koncentracijama od 50, 100 i 200 ppm Na-benzoata i K-sorbata pri
pH vrijednosti 4,4 i 4,16. K-sorbat učinkovitije inhibira linearni rast kolonije u usporedbi s Nabenzoatom. |
| Abstract (english) | The aim of the study was to test antifungal activity of sodium benzoate and potassium sorbate on selected fungal species: Penicillium aurantiogriseum, P. expansum and P. italicum at various pH.
Sodium benzoate is a preservative most widely used in carbonated drinks, fruit juices, jams, conserved vegetables, pickles and condiments where, at acidic environment, inhibits fungal growth. Potassium sorbate is primary used as a food preservative. It inhibits molds and yeasts in many food
products, such as cheese, wine, yogurt, soft drinks and baked goods. Experimental results suggest increased antifungal activity of tested compounds at lower pH values. Both compounds inhibit fungi at similar concentrations, although lower pH (4.16) enhances inhibitory effect of K-sorbate. Linear inhibition of fungal growth at 50, 100 and 200 ppm of Na-benzoate and K-sorbate at pH 4.4 and 4.16 was tested. Stronger inhibitory potential of K-sorbate in linear colony growth was observed, compared to effect of Na-benzoate |
