在熟过程中,Crema de Chiapas奶酪的物理化学和微生物组变化
Blanca Nayelli Ocampo Morales1, Arturo Hernández Montes1, Karel Estrada2
1Departamento de Ingeniería Agroindustrial, Universidad Autónoma Chapingo, Texcoco, Estado de México, México.
PloS one
|January 7, 2026
概括
切亚帕斯奶酪的成熟会改变微生物群落,蛋白质含量会影响多样性的变化. 潜在的致病微生物在整个成熟过程中保持在低水平.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 转基因组学是指转基因组学.
背景情况:
- 奇亚帕斯奶酪是一种传统的墨西哥奶酪,具有独特的成熟过程.
- 了解其物理化学和微生物特征的动态变化对于质量控制和安全至关重要.
研究的目的:
- 研究Crema de Chiapas奶酪在成熟过程中的物理化学,微生物学和基因组学特征的动态变化.
- 为了将微生物多样性的变化与成熟阶段和物理化学参数相关联.
主要方法:
- 物理化学分析 (脂肪,盐,蛋白质含量) 在成熟后的2,29和58天.
- 使用下一代测序 (NGS) 和定量PCR (qPCR) 进行微生物学分析.
- 无监督的多变量模型来分析样本分化和微生物多样性.
主要成果:
- 在成熟过程中,蛋白质和盐含量显著变化,而脂肪含量保持稳定.
- 微生物多样性发生了转变,随着成熟的进展,细菌属和真菌/酵母种群的减少.
- 主要的细菌包括链球菌和乳球菌 (增加) 和乳球菌 (减少). 在Candida etchellsii下降,而Candida tropicalis增加.
- 没有潜在的致病细菌 (Aeromonas,Enterobacter);低水平检测到菌.
结论:
- 成熟显著影响了Crema de Chiapas奶酪的微生物组成.
- 蛋白质含量是推动微生物在成熟过程中的转变的关键因素.
- 奶酪基质似乎抑制了潜在的致病微生物的生长,确保了安全的产品.
相关概念视频
Physical and Chemical Properties of Matter
164.8K
The characteristics that enable us to distinguish one substance from another are called properties.
164.8K
Mechanical and Chemical Digestion in the Small Intestine
2.9K
The small intestine plays a crucial role in our digestive system, performing both mechanical and chemical digestion.
Mechanical digestion in the small intestine involves movements such as segmentations and migrating motility complexes (MMCs), primarily controlled by the myenteric plexus. Segmentations are localized contractions occurring in areas of the intestine distended by chyme—a mixture of partially digested food. These contractions mix chyme with digestive juices, facilitating...
Mechanical digestion in the small intestine involves movements such as segmentations and migrating motility complexes (MMCs), primarily controlled by the myenteric plexus. Segmentations are localized contractions occurring in areas of the intestine distended by chyme—a mixture of partially digested food. These contractions mix chyme with digestive juices, facilitating...
2.9K
Factors Influencing Microbial Growth: pH
1.0K
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
1.0K
Extraction: Effects of pH
1.3K
Consider a neutral form of an amine, B, with a partition coefficient, K, in a liquid mixture containing organic and aqueous phases. The pH of the aqueous phase affects the charge on acidic and basic solutes, and the charged form is usually more soluble in the aqueous phase. Suppose the conjugate acid form of the amine is soluble only in the aqueous phase while the base form is soluble in both phases. Then the distribution coefficient, D, can be given as the ratio of amine concentration in the...
1.3K
Physical Methods for Controlling Microbial Growth: Temperature
934
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
934
Physical Properties of Carboxylic Acids
6.2K
Carboxylic acids with lower molecular weight exhibit a sharp and unpleasant odor. They also have higher boiling and melting points than analogous compounds, such as aldehydes, ketones, and alcohols.
6.2K


