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Microfoam
Microfoam is finely textured milk used for making espresso-based coffee drinks, particularly those with latte art. It is typically made with the steam wand of an espresso machine, which pumps steam into a pitcher of milk. The opposite of microfoam is macrofoam (also called ''dry'' foam, in contrast to the ''wet'' foam of microfoam), which has visibly large bubbles, a style of milk commonly used for cappuccinos. Characteristics Microfoam is shiny, slightly thickened, and should have microscopic, uniform bubbles. It is not as viscous or "foamy" as macrofoam – it is better described as "gooey" and resembles melted marshmallows or wet paint. There have been a variety of names used for this ideal standard, such as "microfoam", "velvet milk", "microbubbles", and so forth. Applications The decorative application of microfoam is called latte art, which involves making patterns in espresso-based drinks. Microfoam is essential for this as the microscopic bubbles give definitio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latte Art
Latte art is a method of preparing coffee created by pouring microfoam into a shot of espresso and resulting in a pattern or design on the surface of the latte. It can also be created or embellished by simply "drawing" in the top layer of foam. Latte art is particularly difficult to create consistently, due to the demanding conditions required of both the espresso shot and milk. This, in turn, is limited by the experience of the barista and quality of the espresso machine. The term also applies to other beverages containing milk foam, such as cappuccino and hot chocolate. History Latte art developed independently in different countries, following the introduction of espresso and the development of microfoam, the combination of crema (which is an emulsion of coffee oil and brewed coffee) and microfoam allowing the pattern; it presumably was initially developed in Italy. David Schomer describes pitcher-shaking in latte art as "quite standard in the world of Italian espress ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latte Art
Latte art is a method of preparing coffee created by pouring microfoam into a shot of espresso and resulting in a pattern or design on the surface of the latte. It can also be created or embellished by simply "drawing" in the top layer of foam. Latte art is particularly difficult to create consistently, due to the demanding conditions required of both the espresso shot and milk. This, in turn, is limited by the experience of the barista and quality of the espresso machine. The term also applies to other beverages containing milk foam, such as cappuccino and hot chocolate. History Latte art developed independently in different countries, following the introduction of espresso and the development of microfoam, the combination of crema (which is an emulsion of coffee oil and brewed coffee) and microfoam allowing the pattern; it presumably was initially developed in Italy. David Schomer describes pitcher-shaking in latte art as "quite standard in the world of Italian espress ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Cappuccino
A cappuccino (; ; Italian plural: ''cappuccini'') is an espresso-based coffee drink that originated in Austria and was later popularized in Italy and is prepared with steamed milk foam (microfoam). Variations of the drink involve the use of cream instead of milk, using non-dairy milk substitutes and flavoring with cinnamon or chocolate powder. It is typically smaller in volume than a caffè latte, with a thicker layer of microfoam. The name comes from the Capuchin friars, referring to the colour of their habits, and in this context referring to the colour of the beverage when milk is added in small portion to dark, brewed coffee (today mostly espresso). The physical appearance of a modern cappuccino with espresso créma and steamed milk is a result of a long evolution of the drink. The Viennese bestowed the name "Kapuziner", possibly in the 18th century, on a version that included whipped cream and spices of unknown origin. The Italian cappuccino was unknown outside Italy un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foam
Foams are materials formed by trapping pockets of gas in a liquid or solid. A bath sponge and the head on a glass of beer are examples of foams. In most foams, the volume of gas is large, with thin films of liquid or solid separating the regions of gas. Soap foams are also known as suds. Solid foams can be closed-cell or open-cell. In closed-cell foam, the gas forms discrete pockets, each completely surrounded by the solid material. In open-cell foam, gas pockets connect to each other. A bath sponge is an example of an open-cell foam: water easily flows through the entire structure, displacing the air. A sleeping mat is an example of a closed-cell foam: gas pockets are sealed from each other so the mat cannot soak up water. Foams are examples of dispersed media. In general, gas is present, so it divides into gas bubbles of different sizes (i.e., the material is polydisperse)—separated by liquid regions that may form films, thinner and thinner when the liquid phase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raw Milk
Raw milk or unpasteurized milk is milk that has not been pasteurized, a process of heating liquid foods to kill pathogens for safe consumption and extending the shelf life. Proponents of raw milk have asserted numerous supposed benefits to consumption, including better flavor, better nutrition, contributions to the building of a healthy immune system and protection from allergies. However, no clear benefit to consumption has been found, and the medical community notes there is increased risk of contracting dangerous milk borne diseases from these products substantial evidence of this increased risk, combined with a lack of any clear benefit, has led countries around the world to either prohibit the sale of raw milk or require warning labels on packaging when sold. In countries where it is available for sale, its availability and regulations around its sale vary. In the EU, member states can prohibit or restrict the sale of raw milk, but it is not banned outright; in some membe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pasteurization
Pasteurization or pasteurisation is a process of food preservation in which packaged and non-packaged foods (such as milk and fruit juices) are treated with mild heat, usually to less than , to eliminate pathogens and extend shelf life. The process is intended to destroy or deactivate microorganisms and enzymes that contribute to food spoilage or risk of disease, including vegetative bacteria, but most bacterial spores survive the process. The process is named after the French microbiologist Louis Pasteur whose research in the 1860s demonstrated that thermal processing would deactivate unwanted microorganisms in wine. Spoilage enzymes are also inactivated during pasteurization. Today, pasteurization is used widely in the dairy industry and other food processing industries to achieve food preservation and food safety. By the year 1999, most liquid products were heat treated in a continuous system where heat can be applied using a plate heat exchanger or the direct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latte Macchiato With Coffee Beans
Caffè latte (), often shortened to just latte () in English, is a coffee beverage of Italian origin made with espresso and steamed milk. Variants include the chocolate-flavored mocha or replacing the coffee with another beverage base such as masala chai (spiced Indian tea), mate, matcha, turmeric or rooibos; alternatives to milk, such as soy milk or almond milk, are also used. The term comes from the Italian ' or ', from ', literally "coffee and milk"; in English orthography either or both words sometimes have an accent on the final ''e'' (a hyperforeignism in the case of *''latté'', or to indicate it is pronounced, not the more-common silent final ''e'' of English). In northern Europe and Scandinavia, the term ''café au lait'' has traditionally been used for the combination of espresso and milk. In France, ' is from the original name of the beverage (caffè latte); a combination of espresso and steamed milk equivalent to a "latte" is in French called and in German '. O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powdered Milk
Powdered milk, also called milk powder, dried milk, or dry milk, is a manufactured dairy product made by evaporating milk to dryness. One purpose of drying milk is to preserve it; milk powder has a far longer shelf life than liquid milk and does not need to be refrigerated, due to its low moisture content. Another purpose is to reduce its bulk for the economy of transportation. Powdered milk and dairy products include such items as dry whole milk, nonfat (skimmed) dry milk, dry buttermilk, dry whey products and dry dairy blends. Many exported dairy products conform to standards laid out in ''Codex Alimentarius''. Powdered milk is used for food as an additive, for health (nutrition), and also in biotechnology (saturating agent). History and manufacture While Marco Polo wrote of Mongolian Tatar troops in the time of Kublai Khan who carried sun-dried skimmed milk as "a kind of paste", the first modern production process for dried milk was invented by the Russian doctor Osip Kr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beta-lactoglobulin
β-Lactoglobulin (BLG) is the major whey protein of cow and sheep's milk (~3 g/L), and is also present in many other mammalian species; a notable exception being humans. Its structure, properties and biological role have been reviewed many times. BLG is considered to be a milk allergen. Function The major protein in whey is β-lactoglobulin, followed by α-lactalbumin (β-lactoglobulin ≈ 65%, α-lactalbumin ≈ 25%, serum albumin ≈ 8%, other ≈ 2%). β-lactoglobulin is a lipocalin protein, and can bind many hydrophobic molecules, suggesting a role in their transport. β-lactoglobulin has also been shown to be able to bind iron via siderophores and thus might have a role in combating pathogens. Upon ingestion BLG is able to shuttle complexed iron into human immune cells, thereby providing micronutrition to these cells and participating in immune tolerance. A homologue of β-lactoglobulin is lacking in human breast milk. Structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Polarity
In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end. Polar molecules must contain one or more polar chemical bond, bonds due to a difference in electronegativity between the bonded atoms. Molecules containing polar bonds have no molecular polarity if the Bond dipole moment, bond dipoles cancel each other out by symmetry. Polar molecules interact through dipole–dipole intermolecular forces and hydrogen bonds. Polarity underlies a number of physical properties including surface tension, solubility, and melting and boiling points. Polarity of bonds Not all atoms attract electrons with the same force. The amount of "pull" an atom exerts on its electrons is called its electronegativity. Atoms with high electronegativitiessuch as fluorine, oxygen, and nitrogenexert a greater pull on electrons than atoms with lower electronegativities su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphiphilic
An amphiphile (from the Greek αμφις amphis, both, and φιλíα philia, love, friendship), or amphipath, is a chemical compound possessing both hydrophilic (''water-loving'', polar) and lipophilic (''fat-loving'') properties. Such a compound is called amphiphilic or amphipathic. Common amphiphilic substances are soaps, detergents, and lipoproteins. The phospholipid amphiphiles are the major structural component of cell membranes. Amphiphiles are the basis for a number of areas of research in chemistry and biochemistry, notably that of lipid polymorphism. Organic compounds containing hydrophilic groups at both ends of the molecule are called bolaamphiphilic. The micelles they form in the aggregate are prolate. Structure The lipophilic group is typically a large hydrocarbon moiety, such as a long chain of the form CH3(CH2)n, with n > 4. The hydrophilic group falls into one of the following categories: # charged groups #* anionic. Examples, with the lipophilic part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adsorption
Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the ''adsorbate'' on the surface of the ''adsorbent''. This process differs from absorption, in which a fluid (the ''absorbate'') is dissolved by or permeates a liquid or solid (the ''absorbent''). Adsorption is a '' surface phenomenon'', while absorption involves the whole volume of the material, although adsorption does often precede absorption. The term '' sorption'' encompasses both processes, while '' desorption'' is the reverse of it. Like surface tension, adsorption is a consequence of surface energy. In a bulk material, all the bonding requirements (be they ionic, covalent or metallic) of the constituent atoms of the material are fulfilled by other atoms in the material. However, atoms on the surface of the adsorbent are not wholly surrounded by other adsorbent atoms and therefore can attract adsorbates. The exact nature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
