Video Experimental Relacionado
Updated: Jan 31, 2026
08:29
Measuring Liver Mitochondrial Oxygen Consumption and Proton Leak Kinetics to Estimate Mitochondrial Respiration in Holstein Dairy Cattle
Published on: November 30, 2018
11.9K
Oxitocina plasmática en vacas lecheras secas después de usar un cepillo mecánico
Lena Skånberg1, Sigrid Agenäs1, Rupert Bruckmaier2
1Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden.
JDS communications
|January 30, 2026
Resumen
El uso de cepillos mecánicos en vacas lecheras puede aumentar los niveles de oxitocina (OT), lo que indica posibles efectos calmantes, particularmente en animales más jóvenes. La región corporal específica cepillada también influyó en estas respuestas fisiológicas.
Área de la Ciencia:
- Ciencia del Bienestar Animal
- Fisiología del Ganado Lechero
- Endocrinología Conductual
Sus antecedentes:
- Los cepillos mecánicos son comunes en las instalaciones de ganado lechero, se presume que mejoran el bienestar.
- El impacto fisiológico del acicalamiento automático a través de cepillos mecánicos en las vacas no se comprende bien.
- La estimulación táctil suave en mamíferos a menudo se correlaciona con respuestas hormonales calmantes.
Objetivo del estudio:
- Investigar el efecto del uso de cepillos mecánicos en los niveles de oxitocina (OT) plasmática en vacas lecheras.
- Explorar la relación entre la región corporal cepillada y los cambios en los niveles de OT.
- Evaluar si el acicalamiento automático con cepillos provoca indicadores fisiológicos de estados afectivos positivos.
Principales métodos:
- Se observaron 12 vacas lecheras secas (no lactantes) con acceso individual a un cepillo mecánico.
- Se recolectaron tres muestras de sangre por vaca: pre-cepillado (basal) y post-cepillado.
- Se midieron las concentraciones de oxitocina (OT) plasmática para evaluar las respuestas fisiológicas al cepillado.
Principales resultados:
- Los niveles de OT plasmática aumentaron a los 2 minutos después del uso del cepillo, pero solo en vacas más jóvenes (≤2 lactaciones previas).
- El aumento observado de OT fue pequeño pero potencialmente biológicamente significativo.
- Los cambios en los niveles de OT difirieron según la región corporal específica que la vaca eligió cepillar.
Conclusiones:
- El uso de cepillos mecánicos puede inducir una respuesta fisiológica pequeña y potencialmente beneficiosa para el bienestar (aumento de OT) en vacas lecheras más jóvenes.
- La región corporal específica cepillada por la vaca es un factor relevante que influye en la respuesta de la oxitocina.
- Se necesita más investigación para comprender completamente las implicaciones para el bienestar del uso de cepillos mecánicos y las preferencias de la región corporal en el ganado lechero.
Videos de Conceptos Relacionados
01:30Dry Friction
983
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
983
01:21Drying Shrinkage
370
When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage.
A portion of this drying shrinkage can be reversed; if the concrete is...
A portion of this drying shrinkage can be reversed; if the concrete is...
370
01:21Characteristics of Dry Friction
979
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
979
01:24Composition of Blood Plasma
8.4K
Blood plasma is a fluid that contains approximately 92% water and 8% solutes. The solutes include various types of proteins, which constitute about 7% of the total solutes in the plasma. The high-molecular-weight proteins—albumins, globulins, and fibrinogen—are essential to plasma function. Albumins, making up about 60% of the plasma proteins, maintain the osmotic balance within blood vessels by preventing excessive water leakage. Additionally, albumins serve as carrier proteins,...
8.4K
03:06Reaction Mechanisms
30.8K
Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
For instance, the decomposition of ozone appears to follow a mechanism with two steps:
For instance, the decomposition of ozone appears to follow a mechanism with two steps:
30.8K
00:52Washing, Drying, and Ignition of Precipitates
6.8K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
6.8K