Ultrasound: biological effects and industrial hygiene concerns.

تأثیر امواج فراصوت بر باززایی ساقه‌های چندگانه از نوک ساقه اسپرس (Onobrychis sativa)

Ultrasound has multiple industrial, medical and biotechnological applications. Ultrasound increases membrane permeability and causes several biological effects in plant cells. In this research, the effects of ultrasound on survival and growth of the sainfoin shoot apex explants were investigated. For this, shoot apex explants were exposed to ultrasonic waves (Frequency 37 kHz) for 0, 20, 30, 40...

An industrial health service in Norway.

Norway has an area of approximately 320,000 square kilometres, with a population of only about 3*2 millions. About 30% of the population live in the cities, whereas 20% live in suburban and industrial areas and other population centres, and the remaining 50% in rural areas. The main occupations in Norway are agriculture and forestry, fishing and whaling, manufacturing and trade, as well as busi...

Biological Effect of Modern Fetal Ultrasound Techniques on Human Dermal Fibroblast Cells

Background: Diagnostic ultrasound has been used to detect human disease especially fetus abnormalities in recent decades. Although the harmful effects of diagnostic ultrasound on human have not been established so far, several researchers showed it has had bioeffects in cell lines and in experimental animals. Three-dimensional (3D), four-dimensional (4D), and color Doppler sonography are new te...

Fatigue effects of light repetitive work on sensory motor coordination.

تاثیر امواج فراصوت با انرژی پایین بر تمامیت غشای سلول های جداکشت جعفری

The ability to sense and respond to physical stimuli is an important key of the life. It was recognized that ultrasound as a physical stimulus could produce drastic changes in biological systems. High-intensity ultrasound is well known to be destructive to biological materials, but low-intensity ultrasound, on the other hand, has shown a range of biological effects with potential significance i...