The present invention relates to a browning-inhibiting composition containing a compound represented by the following formula (1): ##STR00001##
wherein R.sup.21, R.sup.22, R.sup.23, R.sup.24, R.sup.26 and R.sup.27 each independently represent a hydrogen atom or a substituent, and at least one of R.sup.21 or R.sup.23 is a hydrogen atom; when R.sup.23 represents a hydrogen atom, at least one of R.sup.22 or R.sup.24 represents a substituent; R.sup.25 represents a hydrogen atom, an oxygen atom, or a substituent; R.sup.22 and R.sup.23, or R.sup.23 and R.sup.24 may be bonded together to form a ring with an oxygen atom and a carbon atom to which these Rs are bonded; R.sup.25 and R.sup.26, or R.sup.26 and R.sup.27 may be bonded together to form a ring structure with carbon atoms to which these Rs are bonded; X represents an oxygen atom or —CH.sub.2—; and a dashed line may represent a double bond.

Provided is a production method for a composition containing non-polymer catechins, including the following step (A): (A) a step of bringing tea leaves into contact with an aqueous solution having a Brix of from 0.2% to 1.0% at from 80° C. to 100° C.

Provided is a production method for a composition containing non-polymer catechins, including the following step (A): (A) a step of bringing tea leaves into contact with an aqueous solution having a Brix of from 0.2% to 1.0% at from 80° C. to 100° C.

The disclosure discloses a nicotinamide dummy template surface molecularly imprinted polymer, a preparation method and application thereof, and belongs to the technical field of chemical materials. The preparation method of the disclosure includes the steps of preparing a modified silica gel carrier, preparing a dummy template surface molecularly imprinted polymer and the like. The disclosure uses nicotinamide, a structural analogue of imidacloprid and acetamiprid, as a dummy template to prepare a silica gel surface molecularly imprinted polymer. The polymer not only can effectively avoid pollution caused by the leakage of template molecules, but also can specifically remove imidacloprid and acetamiprid from water-soluble tea extracts. The removal rate of imidacloprid and acetamiprid is greater than 96% and 93%, respectively, and the loss of tea polyphenols in the extracts is less than 10%. In addition, the molecularly imprinted adsorption column prepared by the disclosure can be eluted with ethanol solution, and the eluted adsorption column can be recycled, so the disclosure can be well applied to the preparation technology of tea extracts and has good application prospects.

Tea polymerized polyphenol-containing beverages having reduced bitterness and astringency of tea polymerized polyphenols while maintaining tea-like preferable flavors, methods of production thereof, and the like are provided. The content of tea polymerized polyphenols in a beverage is adjusted to within a certain range, the total content of RebM and RebD in the beverage is adjusted to within a certain range, and the weight ratio of the total content of RebD and RebM to the content of the tea polymerized polyphenols is adjusted to within a certain range.

Tea polymerized polyphenol-containing beverages having reduced bitterness and astringency of tea polymerized polyphenols while maintaining tea-like preferable flavors, methods of production thereof, and the like are provided. The content of tea polymerized polyphenols in a beverage is adjusted to within a certain range, the total content of RebM and RebD in the beverage is adjusted to within a certain range, and the weight ratio of the total content of RebD and RebM to the content of the tea polymerized polyphenols is adjusted to within a certain range.

The present disclosure provides a functional beverage of dark tea with zero energy for reducing weight and lipid and a preparation method thereof, and relates to the technical field of processing health-promoting beverage. The functional beverage includes 1.5-3.5 parts of dark tea, 0.3-0.7 parts of mulberry leaf, 0.1-0.5 parts of lotus leaf, 0.1-0.3 parts of stevia leaf, and 95.4-97.4 parts of purified water. The preparation process thereof includes treatment of raw materials, circulatory microwave extraction, static settlement, membrane ultrafiltration, and ultra-high temperature instantaneous sterilization (UHT). Compared with the prior art, the functional beverage uses purely natural herb plants without any additives. The obtained product has zero sugar while has the effects of quenching thirst and reducing weight and lipid. Key technologies such as integrated formula, circulatory microwave extraction, and membrane ultrafiltration enable the best flavor and efficacy of the beverage. The beverage has great application for obese and hyperlipidemia patients.

The present disclosure provides a functional beverage of dark tea with zero energy for reducing weight and lipid and a preparation method thereof, and relates to the technical field of processing health-promoting beverage. The functional beverage includes 1.5-3.5 parts of dark tea, 0.3-0.7 parts of mulberry leaf, 0.1-0.5 parts of lotus leaf, 0.1-0.3 parts of stevia leaf, and 95.4-97.4 parts of purified water. The preparation process thereof includes treatment of raw materials, circulatory microwave extraction, static settlement, membrane ultrafiltration, and ultra-high temperature instantaneous sterilization (UHT). Compared with the prior art, the functional beverage uses purely natural herb plants without any additives. The obtained product has zero sugar while has the effects of quenching thirst and reducing weight and lipid. Key technologies such as integrated formula, circulatory microwave extraction, and membrane ultrafiltration enable the best flavor and efficacy of the beverage. The beverage has great application for obese and hyperlipidemia patients.

Disclosed is a raised bottom cold brewing system comprising a bucket having a top side, a cavity, a platform within the cavity, and a bottom side, a lid configured to be placed on top side of the bucket, and a faucet. The bottom side of the bucket includes a raised bottom and a channel surrounding the raised bottom, the platform includes a plurality of openings, and the faucet is below the platform and above the raised bottom and channel.

Disclosed is a raised bottom cold brewing system comprising a bucket having a top side, a cavity, a platform within the cavity, and a bottom side, a lid configured to be placed on top side of the bucket, and a faucet. The bottom side of the bucket includes a raised bottom and a channel surrounding the raised bottom, the platform includes a plurality of openings, and the faucet is below the platform and above the raised bottom and channel.