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Hair Cream
Hair gel is a hairstyling product that is used to harden hair into a particular hairstyle. History Analysis of ancient Egyptian mummies has shown that they styled their hair using a fat-based gel. The researchers behind the analysis say that the Egyptians used the product to ensure that their style stayed in place in both life and death. Natalie McCreesh, an archaeological scientist from the KNH Centre for Biomedical Egyptology at the University of Manchester, England, and her colleagues studied hair samples taken from 18 mummies. The oldest is approximately 3,500 years old, but most were excavated from a cemetery in the Dakhleh Oasis in the Western Desert and date from Greco-Roman times, around 2,300 years ago. The Irish bog body Clonycavan Man, which has been radiocarbon dated to between 392 BC and 201 BC, was found to have been using a hair gel made from pine tree resin imported from Spain or South-west France. In 1914, in a small pharmacy located in the heart of Buenos Ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hair Gel
Hair gel is a hairstyling product that is used to harden hair into a particular hairstyle. History Analysis of ancient Egyptian mummies has shown that they styled their hair using a fat-based gel. The researchers behind the analysis say that the Egyptians used the product to ensure that their style stayed in place in both life and death. Natalie McCreesh, an archaeological scientist from the KNH Centre for Biomedical Egyptology at the University of Manchester, England, and her colleagues studied hair samples taken from 18 mummies. The oldest is approximately 3,500 years old, but most were excavated from a cemetery in the Dakhleh Oasis in the Western Desert and date from Greco-Roman times, around 2,300 years ago. The Irish bog body Clonycavan Man, which has been radiocarbon dated to between 392 BC and 201 BC, was found to have been using a hair gel made from pine tree resin imported from Spain or South-west France. In 1914, in a small pharmacy located in the heart of Buen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean
The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Europe, on the south by North Africa, and on the west almost by the Morocco–Spain border. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The sea was an important rout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amino Acid
Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins. Only these 22 appear in the genetic code of life. Amino acids can be classified according to the locations of the core structural functional groups ( alpha- , beta- , gamma- amino acids, etc.); other categories relate to polarity, ionization, and side-chain group type ( aliphatic, acyclic, aromatic, polar, etc.). In the form of proteins, amino-acid '' residues'' form the second-largest component (water being the largest) of human muscles and other tissues. Beyond their role as residues in proteins, amino acids participate in a number of processes such as neurotransmitter transport and biosynthesis. It is thought that they played a key role in enabling life on Earth and its emergence. Amino acids are formally named by the IUPAC- IUBMB Joint Commi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viscosity
Viscosity is a measure of a fluid's rate-dependent drag (physics), resistance to a change in shape or to movement of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of ''thickness''; for example, syrup has a higher viscosity than water. Viscosity is defined scientifically as a force multiplied by a time divided by an area. Thus its SI units are newton-seconds per metre squared, or pascal-seconds. Viscosity quantifies the internal friction, frictional force between adjacent layers of fluid that are in relative motion. For instance, when a viscous fluid is forced through a tube, it flows more quickly near the tube's center line than near its walls. Experiments show that some stress (physics), stress (such as a pressure difference between the two ends of the tube) is needed to sustain the flow. This is because a force is required to overcome the friction between the layers of the fluid which are in relative motion. For a tube ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymer
A polymer () is a chemical substance, substance or material that consists of very large molecules, or macromolecules, that are constituted by many repeat unit, repeating subunits derived from one or more species of monomers. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compound (chemistry), compounds, produces unique physical property, physical properties including toughness, high rubber elasticity, elasticity, viscoelasticity, and a tendency to form Amorphous solid, amorphous and crystallization of polymers, semicrystalline structures rath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cation
An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convention. The net charge of an ion is not zero because its total number of electrons is unequal to its total number of protons. A cation is a positively charged ion with fewer electrons than protons (e.g. K+ ( potassium ion)) while an anion is a negatively charged ion with more electrons than protons (e.g. Cl− ( chloride ion) and OH− ( hydroxide ion)). Opposite electric charges are pulled towards one another by electrostatic force, so cations and anions attract each other and readily form ionic compounds. Ions consisting of only a single atom are termed ''monatomic ions'', ''atomic ions'' or ''simple ions'', while ions consisting of two or more atoms are termed polyatomic ions or ''molecular ions''. If only a + or − is present, it indic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greaser (subculture)
Greasers are a youth subculture that emerged in the 1950s and early 1960s from predominantly working class and lower-class teenagers and young adults in the United States and Canada. The subculture remained prominent into the mid-1960s and was particularly embraced by certain ethnic groups in urban areas, particularly Italian Americans and Hispanic Americans. History Etymology The etymology for the term ''greaser'' is unknown. By the time of the Civil War, the words "greaser" and "greaseball" were understood to carry racist and segregationist meanings. It is speculated that the word originated in the late 19th century in the United States as a derogatory label for poor laborers, specifically those of Italian, Greek or Mexican descent. The similar term "greaseball" is a slur for individuals of Italian or Greek descent, though to a lesser extent it has also been used more generally to refer to all Mediterranean, Latino, or Hispanic people. Academic Jennifer Grayer Moor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobster
A gangster (informally gangsta) is a criminal who is a member of a gang. Most gangs are considered to be part of organized crime. Gangsters are also called mobsters, a term derived from '' mob'' and the suffix '' -ster''. Gangs provide a level of organization and resources that support much larger and more complex criminal transactions than an individual criminal could achieve. Gangsters have been active for many years in countries around the world. Gangsters are the subject of many novels, films, television series, and video games. Usage In modern usage, the term "gang" is generally used for a criminal organization and the term "gangster" invariably describes a criminal. Much has been written on the subject of gangs, although there is no clear consensus about what constitutes a gang or what situations lead to gang formation and evolution. There is agreement that the members of a gang have a sense of common identity and belonging and this is typically reinforced through shared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rave
A rave (from the verb: '' to rave'') is a dance party at a warehouse, club, or other public or private venue, typically featuring performances by DJs playing electronic dance music. The style is most associated with the early 1990s dance music scene when DJs played at illegal events in musical styles dominated by electronic dance music from a wide range of sub-genres, including drum and bass, dubstep, trap, break, happy hardcore, trance, techno, hardcore, house, and alternative dance. Occasionally live musicians have been known to perform at raves, in addition to other types of performance artists such as go-go dancers and fire dancers. The music is amplified with a large, powerful sound reinforcement system, typically with large subwoofers to produce a deep bass sound. The music is often accompanied by laser light shows, projected coloured images, visual effects and fog machines. Fuelled by the emerging dance scene, and spearheaded by acid house music and undergro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gothic Fashion
Gothic fashion is a clothing style worn by members of the goth subculture. A dark, sometimes morbid, fashion and style of clothing, dress, typical gothic fashion includes black Hair coloring, dyed hair and black clothes. Both male and female goths can wear dark Eye liner, eyeliner, dark nail polish and lipstick (most often black), and dramatic makeup. Styles are often borrowed from the 1550–1600 in European fashion#Elizabethan style, Elizabethans and Victorian fashion, Victorians. BDSM imagery and paraphernalia are also common. Gothic fashion is sometimes confused with heavy metal fashion and Emo#Fashion and subculture, emo fashion. Characteristics Cintra Wilson declares that "The origins of contemporary goth style are found in the Victorian fashion, Victorian cult of mourning." Valerie Steele is an expert in the history of the style. Goth subculture is stereotyped as eerie, mysterious, and complex, and the fashion is used as an outlet to express these characteristics. Goth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subculture
A subculture is a group of people within a culture, cultural society that differentiates itself from the values of the conservative, standard or dominant culture to which it belongs, often maintaining some of its founding principles. Subcultures develop their own norms and values regarding cultural, political, and sexual matters. Subcultures are part of society while keeping their specific characteristics intact. Examples of subcultures include hippies, Hipster (contemporary subculture), hipsters (which include Hipster (1940s subculture), 1940s original parent subculture), Goth subculture, goths, steampunks, Motorcycle club, bikers, Punk subculture, punks, skinheads, gopnik, Hip hop culture, hip-hoppers, Heavy metal subculture, metalheads, cosplayers, otaku, otherkin, Furry fandom, furries, Hacker culture, hackers and more. The concept of subcultures was developed in sociology and cultural studies. Subcultures differ from countercultures. Definitions The ''Oxford English Dictiona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hair Colouring
Hair coloring, or hair dyeing, is the practice of changing the hair color, color of the hair on humans' heads. The main reasons for this are cosmetic: to cover Gray hair, gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or Hair bleaching#Sun exposure, sun bleaching. Hair coloring can be done professionally by a hairdresser or independently at home. Hair coloring is very popular, with 50-80% of women in the United States, Europe, and Japan having reported using hair dye. At-home coloring in the United States reached sales of $1.9 billion in 2011 and was expected to rise to $2.2 billion by 2016. History The dyeing of hair is an ancient art that involves treatment of the hair with various chemical compounds. Assyrian herbals dating back to contain some of the oldest recipes for cosmetic preparations known, including hair dye. The ancient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
