基于海洋藻类的干缓冲剂与二碳酸缓冲剂的比较及其在增加牛奶价值方面的作用
Magna F B Savela1, Laura V Vieira1, Jaqueline G Fischer1
1Research, Teaching and Extension Center in Livestock (NUPEEC), Federal University of Pelotas (UFPel), 96160-000, Pelotas, Brazil.
The Journal of dairy research
|March 5, 2025
概括
用Lithothamnium calcareum补充海产的皮缓冲剂,改善了奶牛的牛奶产量和成分. 这种饮食策略增强了脂肪和能量校正的牛奶产量和牛奶固体,这表明改善了料效率.
科学领域:
- 动物科学动物科学
- 乳制品营养 乳制品营养
- 动物生理学 动物生理学
背景情况:
- 乳牛健康对于奶牛的生产力和牛奶质量至关重要.
- 基于海洋的缓冲剂对乳头功能和代谢健康有潜在的好处.
- 优化奶牛的饮食需要评估新的料添加剂.
研究的目的:
- 评估Lithothamnium calcareum作为乳皮缓冲剂对奶牛表现的影响.
- 评估对牛奶产量,牛奶成分和代谢参数的影响.
- 为了研究养行为和皮健康指标的变化.
主要方法:
- 一项为期60天的研究,涉及36只正在哺乳的荷尔斯坦牛.
- 对照组 (碳酸) 与酸 (0.5% DM) 补充剂的比较.
- 每周监测 rumen 液体,牛奶,血液和便的参数.
主要成果:
- 补充石灰补充剂增加了脂肪和能量校正的牛奶产量 (P ≤0.01).
- 在Lithothamnium calcareum群中观察到牛奶脂肪和总固体的比例更高 (P < 0.05).
- 使用Lithothamnium calcareum观察到增加进食时间和降低便pH值,但没有影响干物摄入量.
结论:
- 干物质0.5%的Lithothamnium calcareum补充剂可以提高奶牛的牛奶产量和质量.
- 这种基于海洋的缓冲物可能会提高料转换效率.
- 对Lithothamnium calcareum在反动物中的机制进行进一步研究是有必要的.
相关概念视频
02:19Buffer Effectiveness
48.4K
Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes in pH relies on the presence of appreciable amounts of its conjugate weak acid-base pair. When enough strong acid or base is added to substantially lower the concentration of either member of the buffer pair, the buffering action within the solution is compromised.
The buffer capacity is the amount of acid or base that can be added to a given volume...
The buffer capacity is the amount of acid or base that can be added to a given volume...
48.4K
01:18Titration of Polyprotic Base with a Strong Acid
733
The titration of a polyprotic base such as sodium carbonate with a strong acid such as hydrochloric acid results in two equivalence points on the titration curve. At the first equivalence point, the carbonate ions in the base are completely converted to bicarbonate ions. The second equivalence point corresponds to the complete conversion of bicarbonate ions to carbonic acid, which dissociates into carbon dioxide and water. The region before the first equivalence point corresponds to the...
733
01:30Buffers: Overview
3.8K
Buffers play a crucial role in stabilizing the pH of a solution by mitigating the effects of small amounts of added acid or base. They consist of a weak acid and its conjugate base or a weak base and its conjugate acid. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl (aq).
3.8K
01:22Bicarbonate-Carbonic Acid Buffer
580
The carbonic acid-bicarbonate buffer system is critical for maintaining the body's pH balance. It operates on the equilibrium:
580
01:20Titration of a Weak Base with a Strong Acid
4.5K
The titration curve of a weak base like ammonia with a strong acid like hydrochloric acid is the mirror image of the titration curve of a weak acid with a strong base.
Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...
Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...
4.5K
01:20Protein Buffers in Blood Plasma and Cells
487
The human body utilizes protein buffer systems to maintain a stable pH. These systems capitalize on the dual role of amino acids, which can act as acids or bases by accepting or releasing hydrogen ions in response to pH changes. Protein buffer systems are particularly significant in the extracellular fluid (ECF) and intracellular fluid (ICF) of active cells, where structural and functional proteins provide substantial buffering capacity.
Certain amino acids can exist in a zwitterion state at a...
Certain amino acids can exist in a zwitterion state at a...
487