La historia ha tratado muy bien los encantos de Cleopatra. Se suele decir de ella que fue una de las mujeres más hermosas del antiguo Egipto y no en vano, Elisabeth Taylor puso a la disposición del character faces one of the most enjoyable cinema. But today, thanks to some certain drawings and engravings found at the time, know that their power of seduction was to lie more in his personality than his looks.
In any case, regardless of where their sex appeal, which is a fact that was able to seduce two of the most powerful men of the Roman Empire: Julius Caesar and Mark Antony. The romances with both were tragic to the point that the second of them committed suicide after receiving a false report about the death of Cleopatra. A few days later, she would do the same to avoid falling into the hands of Octavian, the political enemy of her husband.
The once last queen of ancient Egypt professed devotion to the cult of the body and did it with such rigor is said he could get to write a treatise on hygiene and beauty, which has reached our days. Her know that she bathed in asses' milk flavored with honey, wearing lipstick to their lips and green paints for your eyelids, wearing false eyelashes, which was the outline of your eyes with apricot cream to hide their wrinkles and I used the soap as a basic element of hygiene.
And it is in Rome, the city he loved and hated in equal parts to the Egyptian queen, where legend has it that the soap was born. According to it, on Mount Sapo routinely performed animal sacrifices to honor the gods. The remains of these sacrifices were washed away by rain so went into the river Tiber, on whose banks the slaves of Rome washing clothes. These women found that mixing animal fats with ashes of burnt wood in the killing led to a substance which, as a foam, floating in the river and also made it more effective washing.
The Roman Empire was growing and with it the interest of hygiene, refined, as time passed, soap making. However, after the fall of Roman Empire, Century V, the original soap industry stagnated, so we had to wait until the seventeenth century to come, together with the Baroque taste for back health. However, it was not until the late eighteenth century when there was a really important change that would make the soap industry would find a place that will never leave. And in 1791 a French chemist named Nicolas Leblanc developed a method of preparation of sodium carbonate, the substance in the ash and combines with fat to give rise to soap, from sodium chloride or common salt.
Today, for the manufacture of soap is used carbonate sodium but used other alkalis, substances with a very high-pH above ten, such as sodium hydroxide, or caustic soda or potassium hydroxide. What is done is to develop a chemical reaction called saponification between the alkali and a fatty acid. In these reactions saponification by boiling fat and add the corresponding alkali soap is obtained over a chemical called glycerol.
But why does soap clean your clothes? To answer this question we must look at the structure of any soap that has a hydrophobic part, which does not dissolve in water, and a hydrophilic part "I do that dissolves in water. What will happen is that when the soap is a stain, which usually has an organic and therefore does not dissolve in water, tend to go around so that its hydrophobic part in contact with the stain and hand hydrophilic exposed to water, forming a tiny droplets called micelles that they will be electrically charged and which will form emulsions which can be separated from the rest of the aqueous solution, removing the dirt. Today
there brand of cosmetics and perfumery not produce its own soap, so there are soaps of all tastes and all grades. The soap industry is worth billions of euros per year worldwide and basic sanitation has become a matter of necessity.
0 comments:
Post a Comment