Although they are often recommended to people seeking to improve their hair health, keratin salon treatments and keratin at-home treatments may both cause hair damage and loss. Both types of treatments may contain formaldehyde, a dangerous chemical that is also used in medical laboratories and mortuaries.
Long-lasting results As long as you care for a keratin treatment by not washing your hair too frequently 2 to 3 times a week is enough , then your keratin treatment can last up to 6 months.
Damaged hair has a brittle, straw-like appearance. The hair shaft is fragile and prone to breakage, resulting in split ends and stray, unruly hairs. Table of Contents. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits.
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Neither the aerial screw nor many of his inventions could be put them into practice due to the absence of the necessary technology.
In , British skydiver Adrian Nicholas launched from a height of 3, metres equipped with a paraglider similar to the one devised by the Italian inventor. Leonardo lived in Venice for a long period, where he worked as a military engineer to protect the small republic against a possible naval attack from the Ottoman Empire. The Florentine inventor gave free rein to his imagination and devised an endless array of combat devices, including the diving suit. This peculiar diving suit was composed of a leather jacket, pants and a mask with crystals to be able to see underwater.
Inside the leather jacket, a leather bag with an iron structure contained the air supply. As Leonardo thought that the diver would have to remain submerged for a while, he even devised a recipient for urine, as appears in the Atlantic Codex , a collection of twelve volumes with his drawings and writings.
His passion for the physical laws—which governed his engineering projects—reverberated in disciplines such as physiology. In addition to his contributions in the field of anatomy, with numerous drawings on the human body, Leonardo brought new insights into the mechanics of breathing , including the action of the ribs and the diaphragm.
He also understood the functions of the internal and external intercostal muscles and studied how air circulated in the airways, not to mention the cardiovascular system. After all, what is the human body if not a perfect machine? Click Enter. Login Profile. Es En. Economy Humanities Science Technology. Scientific Insights. Skip to content. Search for:. Home » QA. Add a comment Cancel reply. What Is Private Carriage?
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