相关实验视频
Updated: Feb 28, 2026

08:42
Forced Flowering in Mandarin Trees under Phytotron Conditions
Published on: March 6, 2019
9.5K
热处理对Citrus grandis果汁的生物活性成分和物理化学参数的影响:一种特定种类的研究
Lucia Francesca Vuono1, Roberta Pino1, Natale Badalamenti2,3
1Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy.
Antioxidants (Basel, Switzerland)
|February 27, 2026
概括
热巴氏杀菌减少果汁中的生物活性化合物,但部分保留了功能质量. 品种选择是优化果汁加工和保持健康益处的关键.
科学领域:
- 食品科学 食品科学 食品科学
- 营养生物化学 营养生物化学
- 农业科学 农业科学
背景情况:
- 传统的热巴氏杀菌是水果汁安全性的标准.
- 它对生物活性化合物和功能的影响因水果品种而异.
- 大 (pomelo) 果汁富含生物活性化合物.
研究的目的:
- 评估巴氏杀菌对五种Citrus grandis品种的物理化学性质,生物活性成分和抗氧化剂/酶抑制活性的影响.
- 描述弗拉万的特征,并评估抗氧化能力和酶抑制.
- 为了确定种类对热处理的特定反应.
主要方法:
- 来自五种Citrus grandis品种的果汁被巴氏化.
- 测量了物理化学参数,总多,黄和胡卜素.
- 通过HPLC分析了黄的特征;评估了抗氧化活性 (DPPH,ABTS,FRAP,β-胡卜素) 和酶抑制 (α-氨基酶,α-葡萄糖酶,胰腺脂酶).
主要成果:
- 消毒导致多 (高达40%),黄 (高达45%) 和胡卜素 (高达25%) 的减少,这取决于种类.
- 抗氧化能力和激素清除能力在巴氏消毒后降低.
- 纳林因表现出取决于品种的降解/释放;新鲜果汁具有更高的酶抑制活性,特别是对α-氨酶和α-葡萄糖酶.
结论:
- 热处理显著减少果汁中的生物活性化合物和抗氧化剂能力.
- 功能性质,特别是酶抑制,部分保留.
- 在工业加工过程中,培养品的选择对于保持果汁质量和生物活性化合物水平至关重要.
相关概念视频
Extraction: Effects of pH
1.5K
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...
1.5K
Physical Methods for Controlling Microbial Growth: Temperature
1.3K
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...
1.3K
Physical Properties Affecting Solubility
27.7K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
27.7K
Bioavailability: Influencing Factors
482
Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
482
Responses to Heat and Cold Stress
15.3K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
15.3K

