Category Archives: Chemistry
Vanilla Molecule Painting
Painting number 14 of the 50 Paintings for 2012 goal, now available as a standard greeting card or museum-quality fine art print– rolled, under glass or on canvas.
Vanilla is a flavoring derived from orchids of the genus Vanilla, primarily from the Mexican species, Flat-leaved Vanilla (V. planifolia). The word vanilla derives from the Spanish word “vainilla”, little pod. Pre-Columbian Mesoamerican peoples cultivated vanilla and Spanish conquistador Hernan Cortes is credited with introducing both vanilla and chocolate to Europe in the 1520s.
Vanilla is the second most expensive spice after saffron, because growing the vanilla seed pods is labor-intensive. Despite the expense, vanilla is highly valued for its flavor, which author Frederic Rosengarten, Jr. described in The Book of Spices as “pure, spicy, and delicate” and its complex floral aroma depicted as a “peculiar bouquet”. As a result, vanilla is widely used in both commercial and domestic baking, perfume manufacture and aromatherapy.
There are three main commercial preparations of natural vanilla: whole pod, powder and extract.
Vanilla flavoring in food may be achieved by adding vanilla extract or by cooking vanilla pods in the liquid preparation. A stronger aroma may be attained if the pods are split in two, exposing more of a pod’s surface area to the liquid. In this case, the pods’ seeds are mixed into the preparation. Natural vanilla gives a brown or yellow color to preparations, depending on the concentration. Good-quality vanilla has a strong aromatic flavor, but food with small amounts of low-quality vanilla or artificial vanilla-like flavorings are far more common, since true vanilla is much more expensive.
A major use of vanilla is in flavoring ice cream. The most common flavor of ice cream is vanilla, and thus most people consider it to be the “default” flavor. By analogy, the term “vanilla” is sometimes used as a synonym for “plain”. Although vanilla is a prized flavoring agent on its own, it is also used to enhance the flavor of other substances, to which its own flavor is often complementary, such as chocolate, custard, caramel, coffee, cakes, and others.
The ice cream and chocolate industries together comprise 75% of the market for vanillin as a flavoring, with smaller amounts being used in confections and baked goods.
The cosmetics industry also uses vanilla to make perfume.
Though there are many compounds present in the extracts of vanilla, the compound vanillin featured in this painting is primarily responsible for the characteristic flavor and smell of vanilla.
(Visit Wikipedia for the complete original article on Vanilla.)
Hot Chili Pepper Molecule Painting
Painting number 12 of the 50 Paintings for 2012 goal, now available as a standard greeting card or museum-quality fine art print– rolled, under glass or on canvas.
Chili pepper (also chile pepper or chilli pepper, from Nahuatl chilli) is the fruit of plants from the genus Capsicum, members of the nightshade family, Solanaceae. The term in British English and in Australia, New Zealand, India, Malaysia and other Asian countries is just chilli without pepper.
Chili peppers originated in the Americas. After the Columbian Exchange, many cultivars of chili pepper spread across the world, used in both food and medicine. Chili peppers have been a part of the human diet in the Americas since at least 7500 BC. There is archaeological evidence at sites located in southwestern Ecuador that chili peppers were domesticated more than 6000 years ago, and is one of the first cultivated crops in the Central and South Americas that is self-pollinating.
Christopher Columbus was one of the first Europeans to encounter them (in the Caribbean), and called them “peppers” because they, like black and white pepper of the Piper genus known in Europe, have a spicy hot taste unlike other foodstuffs. Upon their introduction into Europe chilis were grown as botanical curiosities in the gardens of Spanish and Portuguese monasteries. But the monks experimented with the chilis’ culinary potential and discovered that their pungency offered a substitute for black peppercorns, which at the time were so costly that they were used as legal currency in some countries.
The substances that give chili peppers their intensity when ingested or applied topically are capsaicin (8-methyl-N-vanillyl-6-nonenamide) and several related chemicals, collectively called capsaicinoids. This painting represents a capsaicin molecule.
When consumed, capsaicinoids bind with pain receptors in the mouth and throat that are responsible for sensing heat. Once activated by the capsaicinoids, these receptors send a message to the brain that the person has consumed something hot. The brain responds to the burning sensation by raising the heart rate, increasing perspiration and release of endorphins.
The “heat” of chili peppers was historically measured in Scoville heat units (SHU), which is a measure of how much a chili extract must be diluted in sugar syrup before its heat becomes undetectable to a panel of tasters. Bell peppers rank at 0 SHU, New Mexico green chilis at about 1,500 SHU, jalapeños at 2,500–5,000 SHU, and habaneros at 300,000 SHU. The modern commonplace method for quantitative analysis of SHU rating uses high-performance liquid chromatography to directly measure the capsaicinoid content of a chili pepper variety. Pure capsaicin is a hydrophobic, colorless, odorless, and crystalline-to-waxy solid at room temperature, and measures 16,000,000 SHU.
Psychologist Paul Rozin suggests that eating chilis is an example of a “constrained risk” like riding a roller coaster, in which extreme sensations like pain and fear can be enjoyed because individuals know that these sensations are not actually harmful. This method lets people experience extreme feelings without any risk of bodily harm.
Eating chili is viewed as a warrior’s ritual in Japan because of its spicyness that gives individual fear and mental block. By forcing themselves to eat chili, warriors’ mental state gets stronger and may even feel invincible when stepping onto the battlefield. Eating chili has been a popular practice among the karate athletes who use it to strengthen their minds and determination.
(Visit Wikipedia for the complete original article on Chili Pepper.)
Cinnamon Molecule Painting
Painting number 10 of the 50 Paintings for 2012 goal, now available as a standard greeting card or museum-quality fine art print– rolled, under glass or on canvas.
Cinnamon is a spice obtained from the inner bark of several trees from the genus Cinnamomum that is used in both sweet and savoury foods. Cinnamon trees are native to South East Asia, and its origin was a mystery to Europeans until the sixteenth century.
Cinnamon bark is widely used as a spice. It is principally employed in cookery as a condiment and flavoring material. It is used in the preparation of chocolate, especially in Mexico, which is the main importer of true cinnamon. It is also used in many desserts recipes, such as apple pie, donuts, and cinnamon buns as well as spicy candies, tea, hot cocoa, and liqueurs. True cinnamon, rather than cassia, is more suitable for use in sweet dishes. In the Middle East, it is often used in savory dishes of chicken and lamb. In the United States, cinnamon and sugar are often used to flavor cereals, bread-based dishes, and fruits, especially apples; a cinnamon-sugar mixture is even sold separately for such purposes. Cinnamon can also be used in pickling. Cinnamon bark is one of the few spices that can be consumed directly. Cinnamon powder has long been an important spice in Persian cuisine, used in a variety of thick soups, drinks, and sweets. It is often mixed with rosewater or other spices to make a cinnamon-based curry powder for stews or just sprinkled on sweet treats. It is also used in sambar powder or BisiBelebath powder in Karnataka, which gives it a rich aroma and tastes unique. It is also used in Turkish cuisine for both sweet and savory dishes.
Its flavor and odor are due to an aromatic essential oil, Cinnamaldehyde. Its molecular structure is depicted in this painting. The essential oil of cinnamon bark is about 9.0% cinnamaldehyde. This oil is prepared by roughly pounding the bark, macerating it in seawater, and then quickly distilling the whole. This pale yellow viscous liquid occurs naturally in the bark of cinnamon trees and other species of the genus Cinnamomum.
The most obvious application for the organic compound cinnamaldehyde is as flavoring in items like chewing gum, ice cream, candy, and beverages. It is also used in some perfumes of natural, sweet, or fruity scents. Almond, apricot, butterscotch, and other aromas may partially employ the compound for their pleasant smells. Cinnamaldehyde can be used as a food adulterant; powdered beechnut husk aromatized with cinnamaldehyde can be marketed as powdered cinnamon.
Cinnamon has been known from remote antiquity. It was imported to Egypt as early as 2000 BC, but those who report that it had come from China confuse it with cassia.
The Hebrew Bible makes specific mention of the spice many times: first when Moses is commanded to use both sweet cinnamon and cassia in the holy anointing oil; in Proverbs where the lover’s bed is perfumed with myrrh, aloes, and cinnamon; and in Song of Solomon, a song describing the beauty of his beloved, cinnamon scents her garments like the smell of Lebanon. Cinnamon was a component of the Ketoret which is used when referring to the consecrated incense described in the Hebrew Bible and Talmud. It was offered on the specialized incense altar in the time when the Tabernacle was located in the First and Second Jerusalem Temples. The ketoret was an important component of the Temple service in Jerusalem.
It was so highly prized among ancient nations that it was regarded as a gift fit for monarchs and even for a god: a fine inscription records the gift of cinnamon and cassia to the temple of Apollo at Miletus. Though its source was kept mysterious in the Mediterranean world for centuries by the middlemen who handled the spice trade, to protect their monopoly as suppliers, cinnamon is native to Malabar Coast of India, Sri Lanka, Burma and Bangladesh. It is also alluded to by Herodotus and other classical writers. It was too expensive to be commonly used on funeral pyres in Rome, but the Emperor Nero is said to have burned a year’s worth of the city’s supply at the funeral for his wife Poppaea Sabina in AD 65.
Before the foundation of Cairo, Alexandria was the Mediterranean shipping port of cinnamon. Europeans who knew the Latin writers who were quoting Herodotus knew that cinnamon came up the Red Sea to the trading ports of Egypt, but whether from Ethiopia or not was less than clear. When the Sieur de Joinville accompanied his king to Egypt on crusade in 1248, he reported what he had been told—and believed—that cinnamon was fished up in nets at the source of the Nile out at the edge of the world.
Through the Middle Ages, the source of cinnamon was a mystery to the Western world. Marco Polo avoided precision on this score. In Herodotus and other authors, Arabia was the source of cinnamon: giant Cinnamon birds collected the cinnamon sticks from an unknown land where the cinnamon trees grew and used them to construct their nests; the Arabs employed a trick to obtain the sticks. This story was current as late as 1310 in Byzantium, although in the first century, Pliny the Elder had written that the traders had made this up in order to charge more.
The first mention of the spice growing in Sri Lanka was in Zakariya al-Qazwini’s Athar al-bilad wa-akhbar al-‘ibad (“Monument of Places and History of God’s Bondsmen”) in about 1270. This was followed shortly thereafter by John of Montecorvino, in a letter of about 1292.
(Visit Wikipedia for the complete original article on Cinnamon.)
Chocolate Molecule Painting
Painting number 6 of the 50 Paintings for 2012 goal, now available as a standard greeting card or museum-quality fine art print– rolled, under glass or on canvas.
“Chocolate Molecule” is the third of a series of mouthwatering paintings depicting the building blocks of favorite foods and flavors. The primary alkaloid found in chocolate is theobromine, made from carbon, oxygen, nitrogen and hydrogen.
Theobromine (theobromide), also known as xantheose, is a bitter alkaloid of the cacao plant. It is found in chocolate as well as in a number of other foods, including the leaves of the tea plant, and the kola (or cola) nut.
Chocolate is a raw or processed food produced from the seed of the tropical Theobroma cacao tree. Cacao has been cultivated for at least three millennia in Mexico, Central and South America. Its earliest documented use is around 1100 BC. The majority of the Mesoamerican people made chocolate beverages, including the Aztecs, who made it into a beverage known as xocolātl, a Nahuatl word meaning “bitter water”. The seeds of the cacao tree have an intense bitter taste, and must be fermented to develop the flavor.
After fermentation, the beans are dried, then cleaned, and then roasted, and the shell is removed to produce cacao nibs. The nibs are then ground to cocoa mass, pure chocolate in rough form. Because this cocoa mass usually is liquefied then molded with or without other ingredients, it is called chocolate liquor. The liquor also may be processed into two components: cocoa solids and cocoa butter. Unsweetened baking chocolate (bitter chocolate) contains primarily cocoa solids and cocoa butter in varying proportions. Much of the chocolate consumed today is in the form of sweet chocolate, combining cocoa solids, cocoa butter or other fat, and sugar. Milk chocolate is sweet chocolate that additionally contains milk powder or condensed milk. White chocolate contains cocoa butter, sugar, and milk but no cocoa solids.
Cocoa solids contain alkaloids such as theobromine and phenethylamine, which have physiological effects on the body. It has been linked to serotonin levels in the brain. Some research found that chocolate, eaten in moderation, can lower blood pressure. The presence of theobromine renders chocolate toxic to some animals, especially dogs and cats.
Chocolate has become one of the most popular food types and flavors in the world. Gifts of chocolate molded into different shapes have become traditional on certain holidays: chocolate bunnies and eggs are popular on Easter, chocolate coins on Hanukkah, Santa Claus and other holiday symbols on Christmas, and chocolate hearts or chocolate in heart-shaped boxes on Valentine’s Day. Chocolate is also used in cold and hot beverages, to produce chocolate milk and hot chocolate.
Chocolate played a special role in both Maya and Aztec royal and religious events. Priests presented cacao seeds as offerings to the gods and served chocolate drinks during sacred ceremonies. All of the areas that were conquered by the Aztecs that grew cacao beans were ordered to pay them as a tax, or as the Aztecs called it, a “tribute”.
The Europeans sweetened and fattened it by adding refined sugar and milk, two ingredients unknown to the Mexicans. By contrast, the Europeans never infused it into their general diet, but have compartmentalized its use to sweets and desserts. In the 19th century, Briton John Cadbury developed an emulsification process to make solid chocolate creating the modern chocolate bar. Although cocoa is originally from the Americas, today Western Africa produces almost two-thirds of the world’s cocoa, with Côte d’Ivoire growing almost half of it.
(Visit Wikipedia for the complete original article on Chocolate.)