WO2025040656A1 - Bactéries d'acide lactique à acidification rapide et résistantes aux phages pour pâte filamenteuse - Google Patents

Bactéries d'acide lactique à acidification rapide et résistantes aux phages pour pâte filamenteuse Download PDF

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Publication number
WO2025040656A1
WO2025040656A1 PCT/EP2024/073295 EP2024073295W WO2025040656A1 WO 2025040656 A1 WO2025040656 A1 WO 2025040656A1 EP 2024073295 W EP2024073295 W EP 2024073295W WO 2025040656 A1 WO2025040656 A1 WO 2025040656A1
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Prior art keywords
strains
dsm
cheese
phage
milk
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English (en)
Inventor
Vera Kuzina POULSEN
Elahe Ghanei MOGHADAM
Anders NISSEN VARMING
Camilla SOLBERG CARMOHN MUNK
Daniel RYTTER STRANDBERG
Anders KRARUP
Thomas Janzen
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Chr Hansen AS
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Chr Hansen AS
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Priority to CN202480048082.9A priority Critical patent/CN121666172A/zh
Priority to AU2024328506A priority patent/AU2024328506A1/en
Publication of WO2025040656A1 publication Critical patent/WO2025040656A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; PREPARATION THEREOF
    • A23C19/00—Cheese; Cheese preparations; Making thereof
    • A23C19/02—Making cheese curd
    • A23C19/032—Making cheese curd characterised by the use of specific microorganisms, or enzymes of microbial origin
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; PREPARATION THEREOF
    • A23C19/00—Cheese; Cheese preparations; Making thereof
    • A23C19/06—Treating cheese curd after whey separation; Products obtained thereby
    • A23C19/068—Particular types of cheese
    • A23C19/0684—Soft uncured Italian cheeses, e.g. Mozarella, Ricotta, Pasta filata cheese; Other similar stretched cheeses
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00—Lactic or propionic acid bacteria
    • A23V2400/11—Lactobacillus
    • A23V2400/137—Delbrueckii
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00—Lactic or propionic acid bacteria
    • A23V2400/11—Lactobacillus
    • A23V2400/147—Helveticus
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00—Lactic or propionic acid bacteria
    • A23V2400/21—Streptococcus, lactococcus
    • A23V2400/249—Thermophilus

Definitions

  • the present disclosure generally relates to the field of fermented milk.
  • the present disclosure generally relates to the field of fermented milk.
  • compounds, compositions and methods for the production of cheese are particularly relevant.
  • Streptococcus thermophilus is a thermophilic lactic acid bacterium (LAB), widely used as a starter to produce fermented dairy products.
  • LAB thermophilic lactic acid bacterium
  • ST strains with the ability to acidify milk quickly are essential for several applications amongst other the production of cheese such as e.g. Pasta filata.
  • Phage attacks is a challenge in the manufacturing of fermented milk products. Often a set of several cultures having the same performance are generated for the Dairies to apply a rotation of cultures having different phage-resistance profiles. Thereby, when a phage attack takes place the phage-hit (phage-sensitive) culture can be replaced/rotated with another culture which are phage-resistant.
  • WO2019/137983 describes an optimized method for increasing the yield of Low-Moisture Mozzarella Cheese (LMMC).
  • LMMC Low-Moisture Mozzarella Cheese
  • One aspect of the present disclosure relates to a method for producing a pasta filata type cheese product comprising the steps of: a) Providing a milk base; b) Adding one or more strains of a lactic acid bacteria of the species Streptococcus thermophilus to the milk base, wherein the strains are selected from DSM 34679, DSM 34680, and DSM 34684; c) Adding a coagulant; d) Scalding; e) Draining of whey; f) Cheddaring; g) Stretching; and h) Moulding.
  • a second aspect of the present disclosure relates to a composition or kit-of-parts comprising one or more strains of a lactic acid bacteria of the species Streptococcus thermophilus selected from DSM 34679; DSM 34680; and DSM 34684.
  • a third aspect of the present disclosure relates to a lactic acid bacteria strain of the species Streptococcus thermophilus selected from DSM 34679; DSM 34680; and DSM 34684.
  • a fourth aspect of the present disclosure relates to use of the strain, or the composition or kit-of- parts for producing a pasta filata type cheese product.
  • a fifth aspect of the present disclosure relates to a pasta filata type cheese product made by the method or by the use.
  • Pasta filata is a technique in the manufacture of pasta filata cheese also known as stretched- curd, pulled-curd, and plastic-curd cheese.
  • the technique includes a plasticizing and kneading treatment of the fresh curd in hot water, which gives the cheeses its fibrous structure.
  • cheeses made with this technique include but are not limited to Mozzarella, Burrata, Stracciatella, Scamorza, Caciocavallo, Ragusano, Kashkaval, Provolone and Pizza cheese.
  • the technique is typically comprising the following steps: a) Providing a milk that may be standardized regarding casein and/or fat b) Pasteurizing the milk c) Pre-fermentation I Hot maturation by addition of a Starter culture d) Renneting by addition of a Coagulant e) Cutting f) Scalding / Cooking by raising the temperature typically to between 37°C to 42°C g) Draining of whey h) Cheddaring of curd i) Milling of curd into chips which j) Stretching in warm water k) Molding into shape l) Brining / Salting m) Package and storage.
  • the method of producing pasta filata type cheese is a combination of milk acidification, heat, addition of coagulant/enzymes, and mechanical actions. Most productions starts from a standardized and pasteurized milk. The heat treatment prevents the presence of critical amounts of unwanted bacteria, spores and bacteriophages.
  • One aspect of the present disclosure relates to a method for producing a pasta filata type cheese product comprising the steps of: a) Providing a milk base; b) Adding one or more strains of a lactic acid bacteria of the species Streptococcus thermophilus to the milk base, wherein the strains are selected from DSM 34679, DSM 34680, and DSM 34684; c) Adding a coagulant; d) Scalding; e) Draining of whey; f) Cheddaring; g) Stretching; and h) Moulding.
  • the disclosure relates to a method, wherein the one or more strains are added comprised in a composition or in a kit-of-parts.
  • milk or milk base means a composition comprising lacteal secretion obtained from any mammal, such as an animal of a species belonging to the subfamily Bovinae (which includes the domestic cow (Bos taurus) and buffalo); an animal of a species belonging to the subfamily Caprinae (which includes goat and sheep); or an animal of the species Camelidae (which includes camels).
  • the milk or milk base is acidified, e.g. by addition of an acid (such as citric, acetic or lactic acid) or by addition of an acid producing microorganism.
  • the milk or milk base may be raw or processed, e.g.
  • milk or milk base is pasteurized cow's milk. It is understood that the milk may be acidified, mixed or processed before, during and/or after the adding of bacterial cultures.
  • the milk or milk base may further comprise protein, calcium or other additives added.
  • Starter cultures comprising one or more lactic acid bacteria (LAB) are added to acidify the milk.
  • the acidification decreased pH
  • the starter culture is typically added to the milk having a temperature from 32°C to 37°C, from 33°C to 36°C, or from 34°C to 35°C.
  • the composition of the starter culture influences the functional characteristics of the curd, such as e.g. melting and stretching, by the amount of lactic acid produced and the moisture level obtained.
  • Startter or “Starter culture” as used herein means a culture or composition comprising one or more lactic acid bacteria strains able to acidify a milk base according to general practice in the cheese making industry.
  • a starter culture comprising one or more LAB strains of the species Streptococcus thermophilus (ST)
  • one embodiment of the present disclosure relates to a strain of the species Streptococcus thermophilus (ST).
  • ST species Streptococcus thermophilus
  • ST a strain of the species Streptococcus thermophilus
  • One embodiment of the present disclosure relates to a protease positive ST strain.
  • One embodiment of the present disclosure relates to the starter further comprising one or more strains of the genus Lactobacillus.
  • One embodiment of the present disclosure relates to a starter culture, wherein the one or more strains of the genus Lactobacillus is selected from L. delbrueckii ssp. bulgaricus, L. delbrueckii ssp. lactis, L. fermentum and L. helveticus.
  • the starter comprises a concentration of viable cells in the range of 10 4 to 10 14 , 10 s to 10 13 , 10 8 to 10 12 , or IO 10 to 10 11 cfu per gram of the composition.
  • the disclosure relates to a method, wherein the composition or the kit-of-parts further comprise one or more strains of the genus Lactobacillus, preferably L. delbrueckii ssp. bulgaricus, L. delbrueckii ssp. lactis, L. fermentum and/or L. helveticus.
  • the composition or the kit-of-parts further comprise one or more strains of the genus Lactobacillus, preferably L. delbrueckii ssp. bulgaricus, L. delbrueckii ssp. lactis, L. fermentum and/or L. helveticus.
  • Phage attacks is a continuous challenge during production of fermented milk products, in particular where the fermented milk product is cheese due to the long production time. Accordingly, there is a continuous need for phage-resistant LAB strains for producing suitable starter cultures to replace the phage-hit LAB strains and/or starter cultures.
  • bacteria or "phage” as used herein have the conventional meaning as understood in the art, i.e., a virus that selectively infects one or more bacteria. Many bacteriophages are specific to a particular genus or species or strain of bacteria. Bacteriophages may include, but are not limited to, bacteriophages that belong to any of the following virus families: Corticoviridae, Cystoviridae, Inoviridae, Leviviridae, Microviridae, Myoviridae, Podoviridae, Siphoviridae, or Tectiviridae. The bacteriophage may be a lytic bacteriophage or a lysogenic bacteriophage.
  • a lytic bacteriophage is one that follows the lytic pathway through completion of the lytic cycle, rather than entering the lysogenic pathway.
  • a lytic bacteriophage undergoes viral replication leading to lysis of the cell membrane, destruction of the cell, and release of progeny bacteriophage particles capable of infecting other cells.
  • a lysogenic bacteriophage is one capable of entering the lysogenic pathway, in which the bacteriophage becomes a dormant, passive part of the cell's genome through prior to completion of its lytic cycle.
  • the terms "phage-resistant strain” and "phage robust strain” as used herein refer to a bacterial strain which has a defense mechanism against phages.
  • One embodiment of the present disclosure relates to a lactic acid bacterium strain, wherein the strain is resistant to one or more bacteriophage or one or more sets of bacteriophages.
  • One embodiment of the present disclosure relates to a LAB strain with phage-resistant properties.
  • the phage-resistant LAB strain is resistant towards the phages that are attacking the phage-hit strains, i.e. towards which the phage-hit strains are sensitive.
  • One embodiment of the present disclosure relates to a phage-resistant strain.
  • One embodiment of the present disclosure relates to a phage-resistant strain of the species Streptococcus thermophilus.
  • One aspect of the present disclosure relates to a lactic acid bacteria strain of the species Streptococcus thermophilus selected from DSM 34679; DSM 34680; and DSM 34684.
  • the strains may be comprised in a composition or a kit-of-parts.
  • One aspect of the present disclosure relates to a composition or a kit-of-parts comprising one or more strains of a lactic acid bacteria of the species Streptococcus thermophilus selected from DSM 34679; DSM 34680; and DSM 34684.
  • the composition or kit-of parts may comprise additional strains.
  • strains of the genus Lactobacillus Preferably the one or more strains may be selected from Lactobacillus delbrueckii ssp. bulgaricus, Lactobacillus delbrueckii ssp.
  • lactis Lactobacillus fermentum and/or Lactobacillus helveticus.
  • One embodiment of the present disclosure relates to a composition or kit- of-parts, further comprising one or more strains of the genus Lactobacillus, preferably L. delbrueckii ssp. bulgaricus, L. delbrueckii ssp. lactis, L. fermentum and/or L. helveticus.
  • Rennet is typically added at a temperature from 34°C to 38°C in order to coagulate milk proteins. It may be of animal or vegetable origin and can be liquid, tablet, paste or in powder format.
  • a proteolytic enzyme (protease) comprised in rennet coagulates the milk, causing it to separate into solids and whey. The main enzymatic action comes from chymosin but also pepsin and lipase affect the final result in terms of texture and flavor.
  • Vegetable rennet may originate from the thistle family of plants or from a mold (Mucor Miehei).
  • the term "Coagulant” as used herein means any agent or compound which when added to a milk base results in curd formation by coagulation of casein.
  • the coagulant may be a natural coagulant such as animal rennet such as e.g. calves rennet. It may be of bovine or porcine origin. It may also be a microbial coagulant derived from species such as e.g. Rhizomucor miehei.
  • the active enzyme is called chymosin.
  • the chymosin may be of Camelidae or bovine origin. Examples of commercially available coagulants are e.g. Naturen®, Microlant®, Hannilase® and CHY-MAX® (all from Chr. Hansen A/S).
  • One embodiment of the present disclosure relates to a method, wherein the coagulant is a rennet or a microbial chymosin, preferably a camel chymosin.
  • the curd is cut to promote whey separation.
  • the curd is cut into cubes about 1cm 3 .
  • Curd particles begin shrinking and separating from whey in response to stirring, scalding and acidification.
  • Scalding is a heating step where the temperature is gradually increased to a temperature from 37°C to 43°C.
  • the scalding temperature is gradually increased to a temperature in the range from 39°C to 43°C, from 41°C to 42°C, or about 41.5°C.
  • the cut curds may be kept at a temperature in the range from 30°C to 38°C for up to 8 hours for further acidification and release of whey.
  • Whey viscosity is impacting the whey off i.e. the whey draining step. If the whey is too viscous it is difficult to whey off. Therefore, it is desirable to include strains providing low or no viscosity.
  • the viscosity of fermented milk made with lactic acid bacteria may be measured by TADM (as described in the examples) which provides an indication of the whey viscosity as viscous/texturizing samples would typically have a viscous whey.
  • Strains providing a fermented milk with a TADM value of 1 x 10 6 or more is considered to be viscous/texturizing.
  • One embodiment of the present disclosure relates to strains providing a fermented milk with a TADM value below 1 x 10 6 .
  • the target pH of the curd is from pH 5.0 to pH 5.4.
  • the target pH is pH 5.0, pH 5.1, pH 5.2, pH 5.3, or pH 5.4.
  • Curds acidified to the target pH are milled and cut into small pieces which are optionally salted before stirring with hot water at a temperature in the range from 55°C to 70°C.
  • the temperature of the water is in the range from 60°C to 70°C, from 65°C to 70°C, or about 66°C, 67°C, 68°C, or 69°C.
  • the milled curd is salted in 2% NaCI.
  • the salting may be dry salting.
  • the melted and fluid curd is stretched, shaped, and optionally plunged into cool water. Stretching also called kneading is a result of rearranged casein molecules which depends on the loss of calcium phosphate from casein.
  • the soft curd mass is kneaded into balls or blocks, cooled and placed in brine for a short time.
  • the process is now essentially complete. In some cases further processing steps such as drying, ageing, longer brining, and/or smoking may follow.
  • One aspect of the present disclosure relates to use of the strain, or the composition or kit-of-parts for producing a pasta filata type cheese product.
  • the cheese product may be fresh cheese such as Mozzarella, Halloumi, Burrata, Stracciatelle, Scamorza, and Pizza cheese; low moisture cheese such as low-moisture mozzarella; aged cheese such as Provolone, Ragusano and Caciocavallo, and/or smoked cheese such as Provolone or Scamorza affumicata.
  • the cheese product may be fresh cheese such as Mozzarella, Halloumi, Burrata, Stracciatelle, Scamorza, and Pizza cheese; low moisture cheese such as low-moisture mozzarella; aged cheese such as Provolone, Ragusano and Caciocavallo, and/or smoked cheese such as Provolone or Scamorza affumicata.
  • There are many different types of pasta filata cheeses each characterized by the specific method used in the region of origin.
  • One embodiment of the present disclosure relates to a product, wherein the cheese is Mozzarella, Burrata, Stracciatella, Scamorza, Caci
  • Low-moisture is defined as a moisture content measured in w/w% below 52%, below 51%, below 50%, or in the range of 43-51%, 44-50%, 45-49%, 46-48%, or about 45%, about 46%, about 47%, about 48%, or about 49%.
  • Table 1 The applicant has made the following deposits at a Depositary institution having acquired the status of international depositary authority under the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure: Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures Inhoffenstr. 7B, 38124 Braunschweig, Germany.
  • Single strains were prepared as follows. Working ampoules were made from frozen glycerol stocks by inoculating each single strain in M17 + 0,5% or 2% lactose and incubating overnight (o/n) at 37°C. The cell material was spun down and resuspended in a sterile milk substrate (reconstituting low fat skim milk powder to a dry matter level of 9.5%, autoclaved at 114°C for 15 min.) with 20% glycerol v/v and stored at -80°C.
  • Pre-cultures were prepared by inoculating lOOmL pre-warmed pasteurized low-fat milk (past-LFM) to 1% v/v with thawed ampoule material and incubated at 38°C for 3,5 hours.
  • the pre-cultures were used to inoculate past-LFM in 200mL bottles at 1% v/v.
  • the bottles were incubated at 38°C o/n and pH was monitored every 4 minutes using the Cinac system (Scientific Solutions).
  • CFU colony forming units
  • the lag phase (Ta) was determined as time in minutes from initial pH at the start of fermentation until a pH drop of 0.08 unit was achieved.
  • Blends comprising the single strains were prepared from single strains grown at the Chr. Hansen A/S pilot plant, harvested and formulated as frozen culture material.
  • the content of strains in the two experimental blends Blend A and Blend B is shown in the table below.
  • the reference comprises none of the strains comprised in the experimental blends.
  • the phage profiles of the new strains DSM 34679; DSM 34680; and DSM 34684 were investigated using Chr. Hansen's Streptococcus thermophilus phage collection composed out of phages with different host ranges.
  • the spot test for phage profiling was conducted as follows: O.lmL of the log phase of the culture was mixed with 3mL M17 molten soft agar (0.5% w/v) and plated as a thin top layer on M17-Ca/Mg (lOmM CaCL, lOmM MgCL) agar (1% w/v) plates.
  • the new strains were phage negative (Neg) i.e. phage resistant whereas the reference strains were phage positive (Pos) i.e. phage sensitive as can be seen in the table below.
  • the new strains were also phage negative when tested against 45 different additional phages (data not shown).
  • the reference strains ST-1 to ST-5 were all comprised in Blend R and ST-3 to ST-6 were comprised in a variant of Blend R.
  • Heat-treated skimmed milk was inoculated (1% v/v inoculum) with strains pre-grown in M17-K medium with 2% w/v lactose at 37°C overnight (o/n).
  • the inoculated milk plates were incubated o/n at 40°C and cooled down to 4°C before analysis.
  • the texture assessment of the fermented milk samples was performed using Total Aspiration Dispense Monitoring (TADM) in 2mL microtiter plates as described in Poulsen et al., FEMS Microbiology Letters, Volume 369, Issue 1, 2022, fnacll7 (https://doi.org/10.1093/femsle/fnacll7).
  • Strains resulting in fermented milk with TADM values under 1 million Pa x ms are considered non-texturing strains.
  • Two high texturing benchmark strains ST-7 and ST-8 providing broth viscosity were included as references.
  • the table shows a TADM value below 1x10 s of the new strains and are thus not considered to be viscous/texturizing.
  • Pasta filata cheese was produced in 150L Cheese Vats according to the method outlined in the table below. Milk contained 3.8% protein adjusted with UF retentate powder, and 2.8% fat.
  • Two blends comprising the new strains Blend A and Blend B were tested as starter cultures for fermentation in two separate experiments each including F-DVS® STI-06 (Catalogue no. 704889 Chr. Hansen A/S) as reference (Blend R). In Experiment 1 Blend A and Blend R were inoculation in an amount of 0.013%, and in Experiment 2 Blend B and Blend R were inoculated in an amount of 0.008%.
  • Chy-Max M (Catalogue no. 127405, Chr. Hansen A/S) was used as coagulant for renneting according to providers recommendation.
  • Acidification time was determined by measuring the time in minutes from start of fermentation to target pH 5.10.
  • Cheese yield was determined as the amount in kg of cheese produced from 100 kg miik.
  • Cheese moisture content was measured in % moisture of total mass by a FoodScan unit (Foss Analytics).
  • Shredability was evaluated after 1 week by shredding a cold (5°C) block of cheese.
  • a mechanical sieve the obtained shreds are divided into fractions depending on the size. Typically, fractions comprise shreds of different lengths, the smallest fraction being "fines", which have the least desirable size. Passing through a sieve having a mesh size of 2,36 mm. The final result of the
  • Shredability test is expressed as the amount of "fines" as a percentage of the total weight of shredded cheese tested, the lower the result, the better.
  • Browning was measured after 3 or 5 weeks (Blend A and Blend B respectively) by baking a standard industrial pizza on a crust with tomato sauce in a conveyor oven. The melted cheese on the pizza crust is then visually inspected and analyzed by image analysis based on a greyscale conversion of photos of the pizzas. The median value of the image analysis data will give an indication of the overall browning of the cheese on the pizza. A high score indicates low browning.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Microbiology (AREA)
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Abstract

La présente invention concerne le domaine de la technologie laitière. L'invention concerne des procédés de production de produits fromagers de type à pâte filamenteuse et des produits fabriqués à partir de ceux-ci. L'invention concerne de nouvelles souches et cultures de départ comprenant lesdites souches, appropriées pour préparer des produits fromagers de type à pâte filamenteuse.
PCT/EP2024/073295 2023-08-21 2024-08-20 Bactéries d'acide lactique à acidification rapide et résistantes aux phages pour pâte filamenteuse Pending WO2025040656A1 (fr)

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CN202480048082.9A CN121666172A (zh) 2023-08-21 2024-08-20 用于帕斯塔菲拉塔的快速酸化且具有噬菌体抗性的乳酸菌
AU2024328506A AU2024328506A1 (en) 2023-08-21 2024-08-20 Fast acidifying and phage-resistant lactic acid bacteria for pasta filata

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NL2041115A (en) * 2025-04-28 2025-11-06 Xinjiang Day Run Biotechnology Llc Hand-torn cheese and preparation method thereof

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WO2019137983A1 (fr) 2018-01-11 2019-07-18 Chr. Hansen A/S Interactions entre cultures, coagulants et technologie pour augmenter les rendements fromagers
US20210076696A1 (en) * 2018-01-11 2021-03-18 Chr. Hansen A/S Interactions between cultures, coagulants and technology to increase cheese yields

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Publication number Priority date Publication date Assignee Title
NL2041115A (en) * 2025-04-28 2025-11-06 Xinjiang Day Run Biotechnology Llc Hand-torn cheese and preparation method thereof

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