1. Investigación

Dispositivo en roll-on para la aplicación de monodosis variables de productos de consistencia semisólidalíquida, configurado en sus componentes a partir de un dispositivo tipo constituido por una bola dosificadora (1), una cámara de aplicación (2), que delimita el espacio volumétrico para la dosis exacta de producto, pudiendo contener material de relleno deformable según su naturaleza, y un reservorio multidosis de alimentación de la cámara a través de una válvula de no retorno, mediante la implementación en el mismo de un sistema mecánico de tornillo-corona con dentado helicoidal en un solo eje de trasmisión y válvula de no retorno (4) adaptada, que permite desplazar manualmente la base cóncava (11) de la cámara de aplicación, variando el volumen de producto a aplicar en función de la dosis requerida, con solo el giro de una rueda de accionamiento (12) numerada a través de unas aberturas practicadas en la carcasa exterior. Este rollon posibilita suministrar diferentes dosis exactas de una amplia gama de productos líquidos o de consistencia fluida, de manera sencilla y precisa, lo que es especialmente importante cuando se trata de formulaciones farmacéuticas o medicinales

Slightly more than half of the solar radiation that passes through the atmosphere and reaches the Earth's surface is infrared. Over the past few years, many papers have been published on the possible positive effects of receiving this part of the electromagnetic spectrum. In this article we analyse the role of mitochondria in the supposed effects of infrared light based on the published literature. It is claimed that ATP synthesis is stimulated, which has a positive effect on the skin by increasing fibroblast proliferation, anchorage and production of collagen fibres, procollagen, and various cytokines responsible for the wound healing process, such as keratinocyte growth factor. Currently there are infrared light emitting equipment whose manufacturers and the centres where this service or treatment is offered claim that they are used for skin rejuvenation among other positive effects. Based on the literature review, it is necessary to deepen the scientific study of the mechanism of absorption of infrared radiation through the skin to better understand its possible positive effects, the risks of overexposure and to improve consumer health protection.

Ultrasonic waves are mechanical waves with a frequency greater than 20,000 Hz. Ultrasonic waves are emitted by devices that are used in industry or that have a medical or aesthetic purpose. There is growing interest in the effect of ultrasound absorption on the human body, since people’s exposure to these acoustic waves has increased considerably in recent years. There are more and more devices that emit ultrasounds used for different sanitary procedures, aesthetic treatments and industrial processes, creating more possibilities of ultrasound noise, and therefore an increased risk of occupational hazard and occupational danger. Experiments on animals have shown damage to internal organs from receiving different ultrasonic frequencies. The main task of this work was to organize and summarize recent studies on ultrasound to reflect the current state of this technique and establish a systematic basis for future lines of research. This work has allowed us to better understand the unknown field of these high frequencies of sound, and highlights the need to carry out more studies on the ultrasound emissions that can be absorbed by the human body to determine how this energy could affect humans by calculating the maximum dose of exposure and developing manuals for the use of ultrasound-emitting equipment to protect the health of workers and all people. It is necessary to develop regulations by public administrations to improve the protection of workers, health professionals, patients and all people in general for better occupational safety, indoor environmental quality and environmental health.