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相关概念视频

Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

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The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
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The Bone Matrix01:18

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Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...
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Bone Remodeling01:40

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Osteoclasts in Bone Remodeling01:31

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Roles of Electrolytes: Calcium and Phosphate01:27

Roles of Electrolytes: Calcium and Phosphate

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Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily...
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Hydrolysis of ATP01:08

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The bonds of adenosine triphosphate (ATP) can be broken through the addition of water, releasing one or two phosphate groups in an exergonic process called hydrolysis. This reaction liberates the energy in the bonds for use in the cell—for instance, to synthesize proteins from amino acids.
If one phosphate group is removed, a molecule of ADP—adenosine diphosphate—remains, along with inorganic phosphate. ADP can be further hydrolyzed to AMP—adenosine...
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Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
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酸盐驱动的酸酸的微结构演变.

Yin-Chuan Wang1,2,3,4, Lin-Mao Ma5, Hong-Jin Xue1,2

  • 1School of Radiology, The Second Affiliated Hospital of Shandong First Medical University, Taian, 271016, China.

Dalton transactions (Cambridge, England : 2003)
|June 18, 2025
PubMed
概括
此摘要是机器生成的。

不同的酸盐来源影响酸 (HA) 微观结构. 二酸产生超长的纳米纤维,而六甲酸形成3D微球,揭示了酸介导的HA结构控制.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 生物材料工程 生物材料工程

背景情况:

  • 酸 (HA) 的特性是由其微观结构,成分和尺寸决定的.
  • 关于酸盐前体如何影响HA微观结构的研究有限.

研究的目的:

  • 为了研究不同酸盐来源对酸 (HA) 微观结构的影响.
  • 为了阐明酸盐介导的HA结构演变的机制.

主要方法:

  • 一维 (1D) HA纳米纤维和三维 (3D) 微球通过酸辅助溶热方法合成.
  • 使用了三个不同的酸盐来源:NaH2PO4·2H2O,Na5P3O10和 (NaPO3) 6.6.
  • 使用X射线衍射 (XRD),扫描电子显微镜 (SEM) 和传输电子显微镜 (TEM) 的表征.

主要成果:

  • NaH2PO4·2H2O促进了超长,灵活的HA纳米纤维的形成,具有偏好的c轴生长.
  • (NaPO3) 6抑制了c轴的生长,导致纳米棒自组装成3D微球.
  • Na5P3O10导致中间结构,证明了剂量依赖的效果.

结论:

  • 酸盐前体在调节HA的1D到3D微观结构转换方面发挥着至关重要的作用.
  • 提出了一种通过酸盐介导控制HA形态的机制.
  • 结果为针对特定应用量身定制HA属性提供了洞察力.