Video Experimental Relacionado
Updated: Jul 12, 2026

11:30
A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro
Published on: June 2, 2022
Fosforito biogénico reciente: concreciones en los riñones de los moluscos
Resumen
Los investigadores descubrieron concreciones de fosforita en los riñones de los moluscos, revelando la formación biogénica directa de estos granos. Este hallazgo ofrece nuevos conocimientos sobre los orígenes de los depósitos de fosforita marina más allá de la precipitación química.
Área de la Ciencia:
- Biología Marina Biología Marina.
- La geoquímica es la geoquímica.
- La biomineralización es la biomineralización.
Sus antecedentes:
- Los depósitos de fosforita son formaciones geológicas marinas significativas.
- Su origen a menudo se atribuye a la precipitación química, pero algunos depósitos permanecen sin explicación.
- Los moluscos son organismos marinos comunes con altas densidades de población.
Objetivo del estudio:
- Para investigar la formación biogénica directa de granos de fosforito.
- Para identificar la composición y estructura de las concreciones encontradas en los moluscos.
- Explorar el papel potencial de los moluscos en la formación de fosforito marino.
Principales métodos:
- Detección de concreciones de fosforita en los riñones de Mercenaria mercenaria y Argopecten irradians.
- Análisis químico de la composición del hormigón.
- Análisis de difracción de rayos X para determinar la estructura cristalina después del calentamiento.
Principales resultados:
- Se encontraron concreciones de fosforita en los riñones de dos especies de moluscos.
- Las concreciones son principalmente fosfato de calcio amorfo, que se transforma en clorapatita al calentarse.
- Esto representa la primera documentación de la formación directa de granos de fosforito biogénico.
Conclusiones:
- La formación biogénica de concreciones de fosforita es un proceso excretor normal en moluscos bajo estrés.
- Con el tiempo, los cambios diagenéticos y el enriquecimiento secundario de la fosforita biogénica pueden contribuir a los depósitos de fosforita marina.
- Esta vía biológica ofrece una explicación alternativa para ciertos depósitos de fosforita marina.
Videos de Conceptos Relacionados
Urinary Tract Calculi I: Introduction
Renal calculi, or kidney stones, are solid deposits of minerals and salts formed inside the kidneys. In medical terminology, "calculus" refers to the stone itself, while "lithiasis" describes the process of stone formation. Depending on their location within the urinary system, these stones may be classified as either urolithiasis, when situated within the urinary tract, or nephrolithiasis, when located within the kidneys. Each term signifies the specific impact of the stone.Predisposition...
Renal Corpuscle
The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
The Phosphorus Cycle
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
Roles of Electrolytes: Calcium and Phosphate
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 regulated...
The calcium concentration in blood plasma is primarily regulated...
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Kidney Structure
The kidneys are two large bean-shaped organs located in the upper abdomen. They filter the blood several times a day to remove toxins and rebalance water and electrolytes of the circulatory system via the renal veins. The kidneys receive blood directly from the heart via the renal arteries. These arteries enter the kidney at the hilum, the concave surface of the bean, where they branch and divide into smaller vessels and capillaries.

