Yahoo奇摩 網頁搜尋

搜尋結果

  1. Pneumono­ultra­micro­scopic­silico­volcano­coniosis is the longest word in the English language. The word can be analysed as follows: This word was invented in the daily meeting from the National Puzzlers' League (N.P.L.) by its president Everett M. Smith. The word featured in the headline for an article published by the New York Herald ...

  2. en.wikipedia.org › wiki › AdrenalineAdrenaline - Wikipedia

    Adrenaline, also known as epinephrine, is a hormone and medication[7][8] which is involved in regulating visceral functions (e.g., respiration).[7][9] It appears as a white microcrystalline granule.[10] Adrenaline is normally produced by the adrenal glands and by a small number of neurons in the medulla oblongata.[11] It plays an essential ...

  3. Nicholas of Worcester (died 1124) was the prior of the Benedictine priory of Worcester Cathedral (crypt pictured) from about 1115 until his death. He was born around the time of the Norman Conquest.It is not known who his parents were, but William of Malmesbury wrote that he was "of exalted descent", and it has been argued that he was a son of King Harold Godwinson.

    • Nomenclature
    • Uses
    • Chemistry
    • Stability and Shelf Life
    • History
    • Production
    • In Popular Culture

    Because it has long been known and widely used, the salt has many different names such as baking soda, bread soda, cooking soda, brewing soda and bicarbonate of soda and can often be found near baking powder in stores. The term baking soda is more common in the United States, while bicarbonate of soda is more common in Australia, the United Kingdom...

    Cooking

    In cooking, baking soda is primarily used in baking as a leavening agent. When it reacts with acid or is heated, carbon dioxide is released, which causes expansion of the batter and forms the characteristic texture and grain in cakes, quick breads, soda bread, and other baked and fried foods. When an acid is used, the acid–base reactioncan be generically represented as follows: 1. NaHCO3 + H+ → Na+ + CO2 + H2O Acidic materials that induce this reaction include hydrogen phosphates, cream of ta...

    Pyrotechnics

    Sodium bicarbonate is one of the main components of the common "black snake" firework. The effect is caused by the thermal decomposition, which produces carbon dioxide gas to produce a long snake-like ash as a combustion product of the other main component, sucrose.Sodium bicarbonate also delays combustion reactions through the release of carbon dioxide and water, both of which are flame retardants, when heated.

    Mild disinfectant

    It has weak disinfectant properties, and it may be an effective fungicide against some organisms. Because baking soda will absorb musty smells, it has become a reliable method for used booksellerswhen making books less malodorous.

    Sodium bicarbonate is an amphoteric compound. Aqueous solutions are mildly alkaline due to the formation of carbonic acid and hydroxideion: 1. HCO− 3 + H2O → H2CO3 + OH− Sodium bicarbonate can often be used as a safer alternative to sodium hydroxide, and as such can be used as a wash to remove any acidic impurities from a "crude" liquid, producing ...

    If kept cool (room temperature) and dry (an airtight container is recommended to keep out moist air), sodium bicarbonate can be kept without a significant amount of decomposition for at least two or three years.

    The word natron has been in use in many languages throughout modern times (in the forms of anatron, natrum and natron) and originated (like Spanish, French and English natron as well as 'sodium') via Arabic naṭrūn (or anatrūn; cf. the Lower Egyptian “Natrontal” Wadi El Natrun, where a mixture of sodium carbonate and sodium hydrogen carbonate for th...

    Sodium bicarbonate is produced industrially from sodium carbonate: 1. Na2CO3 + CO2 + H2O → 2 NaHCO3 It is produced on the scale of about 100,000 tonnes/year (as of 2001) [dubious – discuss] with a worldwide production capacity of 2.4 million tonnes per year (as of 2002). Commercial quantities of baking soda are also produced by a similar method: so...

    Sodium bicarbonate, as "bicarbonate of soda", was a frequent source of punch lines for Groucho Marx in Marx Brothers movies. In Duck Soup, Marx plays the leader of a nation at war. In one scene, he receives a message from the battlefield that his general is reporting a gas attack, and Groucho tells his aide: "Tell him to take a teaspoonful of bicar...

  4. en.wikipedia.org › wiki › Amino_acidAmino acid - Wikipedia

    Ionization and Brønsted character of N-terminal amino, C-terminal carboxylate, and side chains of amino acid residues The common natural forms of amino acids have a zwitterionic structure, with −NH + 3 (−NH + 2 − in the case of proline) and −CO − 2 functional groups attached to the same C atom, and are thus α-amino acids, and are the only ones found in proteins during translation ...

  5. Probability theory. In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is. The parameter is the mean or expectation of the distribution (and also its median and mode ), while ...

  6. en.wikipedia.org › wiki › TermiteTermite - Wikipedia

    Termitidae. Termites are a group of detritophagous eusocial insects which consume a wide variety of decaying plant material, generally in the form of wood, leaf litter, and soil humus. They are distinguished by their moniliform antennae and the soft-bodied and often unpigmented worker caste for which they have been commonly termed " white ants ...