|
1938 In Science
The year 1938 in science and technology involved some significant events, listed below. Astronomy *June 28 – A 450-ton meteorite strikes the Earth in an empty field near Chicora, Pennsylvania, United States. Biology * December 22 – Marjorie Courtenay-Latimer discovers a Coelacanth, formerly seen only in fossils millions of years old, in a fisherman's catch in South Africa. * Last known (captive) specimen of Schomburgk's deer is killed. * Bawden and Pirie publish the first crystal of a spherical virus, Tomato bushy stunt virus. Chemistry * April 6 – Roy J. Plunkett of DuPont accidentally discovers polytetrafluoroethylene (Teflon). * September 20 – The first patents for nylon (first synthesized in 1935) are granted in the name of Wallace Carothers to DuPont. The first items produced in the new material are toothbrush bristles. * November 16 – Lysergic acid diethylamide is first synthesized by Albert Hofmann from ergotamine at the Sandoz Laboratories in Basel. * Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nylon
Nylon is a family of synthetic polymers characterised by amide linkages, typically connecting aliphatic or Polyamide#Classification, semi-aromatic groups. Nylons are generally brownish in color and can possess a soft texture, with some varieties exhibiting a silk-like appearance. As Thermoplastic, thermoplastics, nylons can be melt-processed into fibres, Thin film, films, and diverse shapes. The properties of nylons are often modified by blending with a variety of additives. Numerous types of nylon are available. One family, designated nylon-XY, is derived from diamines and dicarboxylic acids of carbon chain lengths X and Y, respectively. An important example is nylon-6,6 (). Another family, designated nylon-Z, is derived from amino acid, aminocarboxylic acids with carbon chain length Z. An example is nylon-[6]. Nylon polymers have extensive commercial applications, including uses in textiles and fibres (such as apparel, flooring and rubber reinforcement), molded components fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Konrad Zuse
Konrad Ernst Otto Zuse (; ; 22 June 1910 – 18 December 1995) was a German civil engineer, List of pioneers in computer science, pioneering computer scientist, inventor and businessman. His greatest achievement was the world's first programmable computer; the functional program-controlled Turing completeness, Turing-complete Z3 (computer), Z3 became operational in May 1941. Thanks to this machine and its predecessors, Zuse is regarded by some as the inventor and father of the modern computer. Zuse was noted for the S2 computing machine, considered the first process control computer. In 1941, he founded one of the earliest computer businesses, producing the Z4 (computer), Z4, which became the world's first commercial computer. From 1943 to 1945 he designed Plankalkül, the first high-level programming language. In 1969, Zuse suggested the concept of a digital physics, computation-based universe in his book (''Calculating Space''). Much of his early work was financed by his f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Cyanamid
American Cyanamid Company was an American manufacturing conglomerate. It began as a fertilizer company and added many additional lines of business before merging with American Home Products in 1994. The combined company sold off most of its divisions, adopted the name of its remaining Wyeth division, and was bought by Pfizer in 2009, becoming defunct as a separate concern. History The company was founded by engineers Frank S. Washburn and Charles H. Baker in New York City in 1907, to capitalize on a German patent they had licensed for the manufacture of nitrogen products for fertilizer. The company's name is derived from the chemical ''calcium cyanamide'', the fertilizer they would manufacture. They soon set up headquarters in Nashville, investing a million dollars in several corporations underpinning the manufacturing operation to be set up in nearby Muscle Shoals, Alabama (sometimes called Mussel Shoals), 120 miles from Nashville, on the Tennessee River. These planned ope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melamine
Melamine is an organic compound with the formula C3H6N6. This white solid is a trimer (chemistry), trimer of cyanamide, with a 1,3,5-Triazine, 1,3,5-triazine skeleton. Like cyanamide, it contains 66% nitrogen by mass, and its derivatives have fire retardant, fire-retardant properties due to its release of nitrogen gas when burned or charred. Melamine can be combined with formaldehyde and other agents to produce melamine resins. Such resins are characteristically durable thermosetting plastic used in high–pressure decorative laminates such as Formica (plastic), Formica, melamine dinnerware including cooking utensils, plates, and plastic products, laminate flooring, and dry erase boards. Melamine foam is used as insulation and soundproofing material, and in polymeric cleaning products such as Magic Eraser. Melamine-formaldehyde resin tableware was evaluated by the Taiwan Consumers' Foundation to have 20,000 parts per billion of free melamine that could migrate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basel
Basel ( ; ), also known as Basle ( ), ; ; ; . is a city in northwestern Switzerland on the river Rhine (at the transition from the High Rhine, High to the Upper Rhine). Basel is Switzerland's List of cities in Switzerland, third-most-populous city (after Zurich and Geneva), with 177,595 inhabitants within the city municipality limits. The official language of Basel is Swiss Standard German and the main spoken language is the local Basel German dialect. Basel is commonly considered to be the cultural capital of Switzerland and the city is famous for its many Museums in Basel, museums, including the Kunstmuseum Basel, Kunstmuseum, which is the first collection of art accessible to the public in the world (1661) and the largest museum of Swiss art, art in Switzerland, the Fondation Beyeler (located in Riehen), the Museum Tinguely and the Museum of Contemporary Art (Basel), Museum of Contemporary Art, which is the first public museum of contemporary art in Europe. Forty museums ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandoz Laboratories
Novartis AG is a Swiss multinational corporation, multinational pharmaceutical company, pharmaceutical corporation based in Basel, Switzerland. Novartis is one of the largest pharmaceutical companies in the world and was the eighth largest by revenue in 2024. Novartis manufactures the drugs clozapine (Clozaril), diclofenac (Voltaren; sold to GlaxoSmithKline in 2015 deal), carbamazepine (Tegretol), valsartan (Diovan), imatinib mesylate (Gleevec/Glivec), cyclosporine (Neoral/Sandimmune), letrozole (Femara), methylphenidate (Ritalin; produced by Sandoz since 2023), terbinafine (Lamisil), deferasirox (Exjade), and others. Novartis was formed in 1996 by the merger of Ciba-Geigy and Sandoz. It was considered the largest corporate merger in history during that time. The pharmaceutical and agrochemical divisions of both companies formed Novartis as an independent entity. The name Novartis was based on the Latin terms, ''novae artes'' (new skills). After the merger, other Ciba-Geigy and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ergotamine
Ergotamine, sold under the brand name Ergomar among others, is an ergopeptine and part of the ergot family of alkaloids; it is structurally and biochemically closely related to ergoline. It is structurally similar to several neurotransmitters, and it acts as a vasoconstrictor. It is used for acute migraines, sometimes with caffeine as the combination ergotamine/caffeine. The drug is a non-selective modulator or agonist of serotonin receptors and other receptors. It is peripherally selective and crosses into the brain in minimal amounts. Medicinal use of ergot fungus began in the 16th century, for the induction of childbirth; but dosage uncertainty discouraged its use. It has been used to prevent post-partum hemorrhage (bleeding after childbirth). It was first isolated from the ergot fungus by Arthur Stoll, at Sandoz in 1918, and was marketed as Gynergen in 1921. Medical uses Ergotamine is indicated as therapy to abort or prevent vascular headache. Available ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Hofmann
Albert Hofmann (11 January 1906 – 29 April 2008) was a Swiss chemist known for being the first to synthesize, ingest, and learn of the psychedelic effects of lysergic acid diethylamide (LSD). Hofmann's team also isolated, named and synthesized the principal psychedelic mushroom compounds psilocybin and psilocin. He authored more than 100 scientific articles and numerous books, including ''LSD: Mein Sorgenkind'' (''LSD: My Problem Child''). In 2007, he shared first place with Tim Berners-Lee on a list of the 100 greatest living geniuses published by ''The Daily Telegraph'' newspaper. Early life and education Albert Hofmann was born in Baden, Switzerland, on 11 January 1906. He was the first of four children to factory toolmaker Adolf Hofmann and Elisabeth ( Schenk) and was baptized Protestant. When his father became ill, Hofmann obtained a position as a commercial apprentice in concurrence with his studies. Owing to his father's low income, Albert's godfather paid for his e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lysergic Acid Diethylamide
Lysergic acid diethylamide, commonly known as LSD (from German ; often referred to as acid or lucy), is a Semisynthesis, semisynthetic, Hallucinogen, hallucinogenic compound derived from ergot, known for its powerful psychological effects and Serotonin, serotonergic activity. It was historically significant in psychiatry and 1960s counterculture; it is currently legally restricted but experiencing renewed scientific interest and increasing use. When taken orally, LSD has an onset of action within 0.4 to 1.0 hours (range: 0.1–1.8 hours) and a duration of effect lasting 7 to 12 hours (range: 4–22 hours). It is commonly administered via tabs of Blotting paper, blotter paper. LSD is extremely potent, with noticeable effects at doses as low as 20 Microgram, micrograms and is sometimes taken in much smaller amounts for microdosing. Yet no fatal human overdoses have been documented. LSD is mainly used recreationally or for spiritual purposes. LSD can cause mystical experiences. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristle
A bristle is a stiff hair or feather (natural or artificial), either on an animal, such as a pig, a plant, or on a tool such as a brush or broom. Synthetic types Synthetic materials such as nylon are also used to make bristles in items such as brooms and sweepers. Bristles are often used to make brushes for cleaning purposes, as they are strongly abrasive; common examples include the toothbrush and toilet brush. The bristle brush and the scrub brush are common household cleaning tools, often used to remove dirt or grease from pots and pans. Bristles are also used on brushes other than for cleaning, notably paintbrushes. Bristles are distinguished as ''wikt:flagged, flagged'' (split, bushy ends) or ''unflagged;'' these are also known as ''wikt:flocked, flocked'' or ''unflocked'' bristles. In cleaning applications, flagged bristles are suited for dry cleaning (due to picking up dust better than unflagged), and unflagged suited for wet cleaning (due to flagged ends becoming dirty an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toothbrush
A toothbrush is a special type of brush used to clean the Human tooth, teeth, gingiva, gums, and tongue. It consists of a head of tightly clustered bristles, atop of which toothpaste can be applied, mounted on a handle (grip), handle which facilitates the cleaning of hard-to-reach areas of the mouth. They should be used in conjunction with something to clean between the teeth where the bristles of the toothbrush cannot reach - for example Dental floss, floss, tape, interdental brushes or toothpicks. They are available with different bristle textures, sizes, and forms. Most dentists recommend using a soft toothbrush since hard-bristled toothbrushes can damage tooth enamel and irritate the gums. Because many common and effective ingredients in toothpaste are harmful if swallowed in large doses, tooth paste should instead be spat out. The act of brushing teeth is most often done at a sink within the kitchen or bathroom, where the brush may be rinsed off afterwards to remove any deb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
