The present invention relates to a process for producing a beer bittering agent via enzyme catalyzed bioconversion of hop-derived isoalpha acids to dihydro-(rho)-isoalpha acids.

The present invention relates to a process for producing a beer bite ring agent via enzyme catalyzed bioconversion of hop-derived isoalpha acids to dihydro-(rho)-isoalpha acids.

The invention relates to a method for the production of hulupones, in particular for the production of hulupones products, suitable for beer bittering, essentially free of compounds, typically formed as side-products during the lupulones oxidation, that can cause negative impact in terms of aroma, taste or haze upon brewing application. The invention also relates to hulupones products, suitable for beer bittering and obtainable by the method of the invention, essentially free of compounds with negative aroma, taste or haze impact upon addition of the hulupones products during the brewing process. The invention also relates to beer bittering with hulupones products, obtainable by the method of the invention, not causing an undesirable or unacceptable aroma, taste or haze impact in the bittered beer.

The invention relates to a method for the production of hulupones, in particular for the production of hulupones products, suitable for beer bittering, essentially free of compounds, typically formed as side-products during the lupulones oxidation, that can cause negative impact in terms of aroma, taste or haze upon brewing application. The invention also relates to hulupones products, suitable for beer bittering and obtainable by the method of the invention, essentially free of compounds with negative aroma, taste or haze impact upon addition of the hulupones products during the brewing process. The invention also relates to beer bittering with hulupones products, obtainable by the method of the invention, not causing an undesirable or unacceptable aroma, taste or haze impact in the bittered beer.

The invention relates to a method of preparing a light-stable hop extract, said method comprising: providing a pre-isomerised hop extract comprising at least 10% of iso-alpha acids by weight of dry matter, and illuminating the pre-isomerised hop extract, optionally after dilution of the pre-isomerised hop extract.

The invention relates to a method of preparing a light-stable hop extract, said method comprising: providing a pre-isomerised hop extract comprising at least 10% of iso-alpha acids by weight of dry matter, and illuminating the pre-isomerised hop extract, optionally after dilution of the pre-isomerised hop extract.

The present invention relates to a process for producing a beer bittering agent via enzyme catalyzed bioconversion of hop-derived isoalpha acids to dihydro-(rho)-isoalpha acids and to the novel enzyme catalysts which may be employed in such a process.

The present invention relates to a process for producing a beer bittering agent via enzyme catalyzed bioconversion of hop-derived isoalpha acids to dihydro-(rho)-isoalpha acids and to the novel enzyme catalysts which may be employed in such a process.

The present invention relates to a process for producing a beer bittering agent via enzyme catalyzed bioconversion of hop-derived isoalpha acids to dihydro-(rho)-isoalpha acids.

A device for extracting aroma substances from vegetable aroma carriers into a brewing liquid includes a solids separating device for separating the vegetable aroma carriers from the brewing liquid in flow, the solids of the aroma carriers being held back in the solids separating device. The device comprises a heater for heating the suspension of brewing liquid and aroma carriers to an isomerization temperature at which the -acids contained in the aroma carriers are converted into iso--acids.