The present invention fits into the field of preservation of foods, preferably baked products, and relates to a composition comprising fermented flour obtained from fermentation by means of lactic and/or propionic acid bacteria, an extract of plant origin, more specifically an extract of Sorbus aucuparia L., and a carrier. The present invention also relates to the use of said composition, preferably in powder form, as an additive for the preservation of foods, preferably baked products. Preferably, the composition of the invention is added to the ingredients for preparing the above-mentioned foods prior to baking.

A food preservative including zinc oxide nanoparticles derived from a pomegranate peel extract and a nanocomposite obtained from at least one of a beetroot extract and a red cabbage extract. The food preservative is characterized by a Fourier-transform infrared spectroscopy (FTIR) pattern including a broad peak at 3500 cm.sup.1 to 3000 cm.sup.1 and a series of three peaks at 900 cm.sup.1 to 1200 cm.sup.1.

A food preservative including zinc oxide nanoparticles derived from a pomegranate peel extract and a nanocomposite obtained from at least one of a beetroot extract and a red cabbage extract. The food preservative is characterized by a Fourier-transform infrared spectroscopy (FTIR) pattern including a broad peak at 3500 cm.sup.1 to 3000 cm.sup.1 and a series of three peaks at 900 cm.sup.1 to 1200 cm.sup.1.

Provided are methods of reducing and killing bacteria and fungi, and photodynamic treatment methods and sterilization methods using the methods of reducing and killing bacteria and fungi. The method of reducing and killing bacteria and fungi includes bringing a composition including a Ligularia fischeri extract or a fraction thereof as an active ingredient into contact with cells or tissues of a subject and irradiating cells or tissues of a subject in contact with the composition with an absorbable wavelength of excitation light.

Provided are methods of reducing and killing bacteria and fungi, and photodynamic treatment methods and sterilization methods using the methods of reducing and killing bacteria and fungi. The method of reducing and killing bacteria and fungi includes bringing a composition including a Ligularia fischeri extract or a fraction thereof as an active ingredient into contact with cells or tissues of a subject and irradiating cells or tissues of a subject in contact with the composition with an absorbable wavelength of excitation light.

An oil comprising (i) at least 30 wt. % of one or more polyunsaturated fatty acids having at least 4 double bonds; (ii) at least one first antioxidant; and (iii) less than about 1000 ppm lecithin. The oil may comprise less than about 750 ppm of a second antioxidant chosen from an ascorbic acid derivative.

An oil comprising (i) at least 30 wt. % of one or more polyunsaturated fatty acids having at least 4 double bonds; (ii) at least one first antioxidant; and (iii) less than about 1000 ppm lecithin. The oil may comprise less than about 750 ppm of a second antioxidant chosen from an ascorbic acid derivative.

The present disclosure discloses an edible film for food preservation, the edible film comprising at least 90 wt % of a first component. The first component comprises chitosan and aloe vera extract. Named parts comprised in the first component make up 100 wt % of the first component. The present disclosure also discloses a method for forming an edible film, the method comprising the steps of extracting aloe vera gel; dissolving chitosan into an aqueous solution; mixing the aloe vera gel with the chitosan solution; casting a film solution; and drying the film to form the edible film. The present disclosure also discloses a packaging for food comprising the edible film.

The present disclosure discloses an edible film for food preservation, the edible film comprising at least 90 wt % of a first component. The first component comprises chitosan and aloe vera extract. Named parts comprised in the first component make up 100 wt % of the first component. The present disclosure also discloses a method for forming an edible film, the method comprising the steps of extracting aloe vera gel; dissolving chitosan into an aqueous solution; mixing the aloe vera gel with the chitosan solution; casting a film solution; and drying the film to form the edible film. The present disclosure also discloses a packaging for food comprising the edible film.

A liquid nitrogen quick-freezing preservation method for fresh bamboo shoots. The method includes performing a coating treatment on cuts of fresh bamboo shoots, which reduces the moisture loss through the cuts, slows down the degree of lignification of the bamboo shoots, mitigates color changes at the cuts, inhibits excessively fast reproduction of microorganisms at the cuts and prevents invasion of microorganisms from the cuts, so that a decrease in nutritional value is reduced, the deterioration of the appearance quality of the bamboo shoots is mitigated, and the nutritional value and commodity value of the bamboo shoots are maintained. The method further includes an intermittent ultrasonic treatment on the fresh bamboo shoots, so that coating substances form films on the surfaces of the cuts more easily, preventing the fresh bamboo shoots from being eroded by microorganisms and preventing nutrient substances from being decomposed and utilized by the microorganisms.