相关实验视频

Updated: Feb 2, 2026

Analysis of Fatty Acid Content and Composition in Microalgae

Analysis of Fatty Acid Content and Composition in Microalgae

Published on: October 1, 2013

生肉和煮熟牛肉中的生物活性化合物和脂肪酸组成,具有两种不同的老化周期

Ana Carolina T S Cougo¹, Guillermo de Souza², Florencia Bonjour³

¹Universidad de la República (UDELAR), Facultad de Agronomía, Programa de Doctorado en Ciencias Agrarias, 12900 Montevideo, Uruguay; Instituto Nacional de Investigación Agropecuaria (INIA), Sistema Ganadero Extensivo, 45000 Tacuarembó, Uruguay.

|January 31, 2026

概括

牛肉的老化和显著改变生物活性化合物和脂肪酸. 较长的老化 (90天) 和生肉状况通常会增加有益的化合物并改变脂肪配置,影响营养价值.

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
肉类科学肉科学

背景情况:

对于消费者来说,了解 post-mortem 加工对肉质的影响至关重要.
生物活性化合物和脂肪酸概况显著影响牛肉的营养价值.
牛肉的营养成分受到老化期和方法等因素的影响.

研究的目的:

调查老化期 (5 vs. 90天) 和肉类状态 (生 vs. 熟) 如何影响牛肉中的生物活性化合物,肌内脂肪 (IMF) 和脂肪酸成分.
分析衰老和对长腰肌肉中特定营养素的相互作用影响.
根据加工条件,提供对牛肉消费的营养影响的见解.

主要方法:

使用来自Angus牛的牛肉样本,采用了2x2的因数设计.
分析包括量化生物活性化合物 (例如,L-卡尼丁,谷氨,氨酸,辅酶Q10,卡诺辛,氨酸) 和肌肉内脂肪含量.
确定脂肪酸成分,包括和脂肪酸 (SFA),单不和脂肪酸 (MUFA) 和多不和脂肪酸 (PUFA),以及相关指数.

主要成果:

对于L-卡尼丁,谷氨和牛来说,观察到衰老和肉类状况之间的显著相互作用.
长时间的衰老 (90天) 增加了辅酶Q10,谷氨,L-卡尼丁和牛的度,同时减少了肉和素.
与煮熟的肉相比,生肉显示出所有生物活性化合物的度更高. 长时间的老化也增加了IMF,SFA,MUFA和动脉动脉生成/血栓生成指数,而也增加了总体脂肪酸度,但降低了PUFA/SFA比率.

结论:

养老时间和肉类状况都对生物活性化合物的度和牛肉的脂肪酸概况产生重大影响.
长达90天的生牛肉通常对某些生物活性化合物和脂肪酸具有更有利的特征.
牛肉的营养评估必须考虑老化时间和方法,以准确反映其成分和健康影响.

关键词:

一个安塞林.肉氨酸 (Carnosine) 是一种碳素.辅酶Q10是一种辅酶.葡萄糖氨酸 (Glutathione) 是一种脂质脂质脂质是一种酸是一种酸.

更多相关视频

The Use of Gas Chromatography to Analyze Compositional Changes of Fatty Acids in Rat Liver Tissue during Pregnancy

The Use of Gas Chromatography to Analyze Compositional Changes of Fatty Acids in Rat Liver Tissue during Pregnancy

Published on: March 13, 2014

Preparation, Purification, and Use of Fatty Acid-containing Liposomes

Preparation, Purification, and Use of Fatty Acid-containing Liposomes

Published on: February 9, 2018

相关概念视频

Overview of Fatty Acid Metabolism

Overview of Fatty Acid Metabolism

Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...

Solution Composition During Acid/Base Titrations

Solution Composition During Acid/Base Titrations

The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...

Composition of Polyprotic Acid Solutions as a Function of pH

Composition of Polyprotic Acid Solutions as a Function of pH

Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
A graph with the alpha values is plotted against the volume of...

Classifying Matter by Composition

Classifying Matter by Composition

Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...

The Periodic Table

The Periodic Table

As early chemists discovered more elements, they realized that various elements could be grouped by their similar chemical behaviors. One such grouping includes lithium (Li), sodium (Na), and potassium (K). All of these elements are shiny, conduct heat and electricity well, and have similar chemical properties. A second grouping includes calcium (Ca), strontium (Sr), and barium (Ba), which also are shiny, good conductors of heat and electricity, and have chemical properties in common. However,...

Periodic Classification of the Elements

Periodic Classification of the Elements

The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...