Abstract: The present disclosure discloses a marker for screening and distinguishing NFC apple juice based on non-targeted metabolomics and use thereof, relating to the technical field of distinguishing of juice. The marker for distinguishing NFC apple juice disclosed in the present disclosure is selected from the following molecules: gallocatechin, catechin, taxifolin, p-hydroxybenzaldehyde, 5-methoxysalicylic acid, azelaic acid, caffeic acid, chlorogenic acid, epicatechin, eriodictyol, ferulic acid, isoquercitrin, naringenin, n-fructosyl isoleucine, p-coumaraldehyde, p-coumaric acid, phloretin, phlorizin, procyanidin B1, quercetin-3-O-galactoside and rutin. The above markers may be used for distinguishing the NFC apple juice and the FC apple juice, and have relatively high accuracy.

Abstract: The present invention relates to a multidimensional ecological preservation technology for sweet potatoes, including the following steps: collecting mature tuberous roots in proper time; and performing BTH soak cleaning to promote callus, and performing callus treatment as follows: pretreatment before storage, disinfection in a cellar, sand storage, tent air conditioning, and performing secondary cobalt ray irradiation at an irradiation dose of 0.1-0.5 kGy before the end of storage and marketing, thereby achieving dual guarantee of storage period and shelf life. In the present invention, the traditional sand is replaced with a sandy material (having a particle size of 1-3 mm), and the sandy material is lightweight, breathable, and high in water absorbing and retaining property, thermal insulation and heat preservation.

Abstract: The disclosure provides chips formed by slicing with an apple cell clean water jet scalpel and a processing technology. The processing technology comprises the following specific steps: harvesting fresh fruits, sorting, peeling, slicing, drying and packaging to obtain the apple crispy chip. According to the disclosure, the tangxin apple is peeled by adopting an ultrahigh pressure water jet flow cutting technology, cut into slices with a thickness of 5 mm and inoculated for 15 min in 30° C. and 30% Lactobacillus brevis fermentation broth. PPO is a terminal oxidase with Cu2+ as a prosthetic group, and Lactobacillus brevis and Lactobacillus plantarum are complexed with Cu2+, leading to rapid oxygen consumption to generate organic acid and CO2, quickly reduction of pH and creation of an approximate oxygen-free environment to effectively inhibit PPO activity while removing oxygen required in enzymatic browning, thereby effectively inhibiting browning.

Abstract: Disclosed is a method for processing Pachyrhizus juice concentrate with good taste and stable color value, with the steps as follows: (1) pretreatment of raw materials; (2) high-temperature enzymolysis: adding the high-temperature amylase for enzymolysis 30 min at 95° C.; (3) juicing; (4) pasteurization; (5) acidity adjustment; (6) enzymolysis: adding raw materials of glucoamylase 747 ml/T pectinase 50 ml/T, activated carbon 3 kg/T, bentonite 1 kg/T to the Pachyrhizus juice after acidity adjustment; (7) secondary pasteurization: cooling to 53° C.; (8) filtration; filtering through 0.45 um twice; (9) acidity adjustment, concentrating and cardboard filtration to obtain the finished product.

Abstract: A method for producing clear, concentrated sweet potato juice, including: a) cleaning, peeling, crushing, and gelatinizing a raw material of sweet potatoes to yield a sweet potato paste, and squeezing the sweet potato paste to obtain skin dregs and a squeezed clear juice; b) performing enzymolysis to part of the skin dregs and adding the hydrolyzed skin dregs to the sweet potato paste for squeezing; c) performing enzymolysis and filtering to the squeezed clear juice to obtain a sweet potato clear juice; d) combining the rest part of the skin dregs and sweet potato skins generated during the peeling process to obtain a sweet potato residue; e) extracting dietary fiber from the sweet potato residue; and f) adding the dietary fiber to the sweet potato clear juice and post-treating the sweet potato clear juice.

Abstract: A method for producing clear, concentrated sweet potato juice, including: a) cleaning, peeling, crushing, and gelatinizing a raw material of sweet potatoes to yield a sweet potato paste, and squeezing the sweet potato paste to obtain skin dregs and a squeezed clear juice; b) performing enzymolysis to part of the skin dregs and adding the hydrolyzed skin dregs to the sweet potato paste for squeezing; c) performing enzymolysis and filtering to the squeezed clear juice to obtain a sweet potato clear juice; d) combining the rest part of the skin dregs and sweet potato skins generated during the peeling process to obtain a sweet potato residue; e) extracting dietary fiber from the sweet potato residue; and f) adding the dietary fiber to the sweet potato clear juice and post-treating the sweet potato clear juice.