坦尼酸和Ca2+双交联酸膜,用于保存激情水果
Jun Yang1,2, Tao Fei2, Wanli Zhang2
1School of Life Sciences, Hainan University, Haikou 570228, China.
Foods (Basel, Switzerland)
|November 14, 2023
概括
这项研究开发了用于食品包装的酸 (TA) 的双交联酸 (SA) 薄膜. 含有30%TA增强屏障特性和保存7天的激情果的SA膜,显示体重减轻和腐烂.
科学领域:
- 材料科学 材料科学 材料科学
- 食品科学 食品科学 食品科学
- 聚合物化学 聚合物化学
背景情况:
- 酸 (SA) 薄膜因其膜形成特性而被探索用于食品包装.
- 提高SA膜的性能,如机械强度,耐水性和屏障功能,对于有效的食品保存至关重要.
- 酸 (TA) 被研究为一种交叉连接剂,以提高SA膜的性能.
研究的目的:
- 使用不同度的酸 (TA) 和Ca2 +,创建双重交叉连接的SA膜.
- 评估这些新型SA膜的光学,机械,防水和屏障性能.
- 为了评估TA的SA涂层在7天的时间内保持激情水果质量的有效性.
主要方法:
- 酸 (SA) 与酸 (TA) 在10%,20%和30%度和Ca2+的双重交叉连接.
- 膜微观结构的表征,分子间相互作用,光学,机械,耐水性和屏障性质.
- 应用含有TA的SA涂层在果上,并评估7天的保存效果.
主要成果:
- 含有20%TA的SA薄膜表现出更好的机械性能,拉伸强度增加了22.54%.
- 含有30%TA的SA膜表现出优越的水蒸气屏障特性 (25.36%高于纯SA) 和强烈的紫外线吸收 (在280nm时0%的透射率).
- 用30%的TASA涂层的激情水果表现出更好的外观,在7天后体重减轻 (8.98%) 和缩指数 (2.17) 最低.
结论:
- 含有20%TA的SA膜提供了优良的机械和屏障性能,适合新鲜食品包装.
- 含有30%TA的SA涂层有效延缓水果衰老和腐烂,保持激情果的质量.
- 开发的带有TA的双交联SA薄膜显示了活性食品包装应用的巨大潜力.
相关概念视频
Membrane Fluidity
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.Fatty acids tails of phospholipids can be either saturated or...
Membrane Fluidity
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Fusion of Secretory Vesicles with the Plasma Membrane
Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
SNAREs and Membrane Fusion
Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
Calmodulin-dependent Signaling
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
Buffers: Overview
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).


