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Émile Duclaux
Émile Duclaux (24 June 1840 – May 2, 1904) was a French microbiologist and chemist born in Aurillac, Cantal. He studied at the College of Aurillac, the Lycée Saint-Louis in Paris and at École Normale Supérieure. In 1862 he began work as an assistant in the laboratory of Louis Pasteur (1822–1895). During his career, he taught classes in Tours (1865), Clermont-Ferrand (1866), Lyon (from 1873) and Paris (from 1878). In Paris, he was a professor of meteorology at the Institute of Agronomy. For much of his career he was associated with the work of Louis Pasteur. In 1888 he was elected to the ''Académie des sciences'', and in 1894 became a member of the '' Académie Nationale de Médecine''. Duclaux's work was largely in the fields of chemistry, bacteriology, hygiene and agriculture. Duclaux initiated the custom of naming enzymes by adding the suffix "-ase" to the enzyme's substrate. His intention was to honor the first scientists (namely Anselme Payen, 1795–1871; and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emile Duclaux
Emile or Émile may refer to: * Émile (novel) (1827), autobiographical novel based on Émile de Girardin's early life * Emile, Canadian film made in 2003 by Carl Bessai * '' Emile: or, On Education'' (1762) by Jean-Jacques Rousseau, a treatise on education; full title ''Émile ou de l'education'' People * Emile (producer), American hip hop producer Emile Haynie * Emil (given name), includes people and characters with given name Emile or Émile * Barbara Emile, British television producer * Chris Emile, American dancer * Jonathan Emile, stage name of Jamaican-Canadian singer, rapper and record producer Jonathan Whyte Potter-Mäl (born 1986) * Yonan Emile Yonan Emile was an Iraqi basketball player. He competed in the men's tournament at the 1948 Summer Olympics The 1948 Summer Olympics, officially the Games of the XIV Olympiad and officially branded as London 1948, were an international mul ..., Iraqi Olympic basketball player * Emile Witbooi. South African soccer pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacteriology
Bacteriology is the branch and specialty of biology that studies the Morphology (biology), morphology, ecology, genetics and biochemistry of bacteria as well as many other aspects related to them. This subdivision of microbiology involves the identification, classification, and characterization of bacterial species. Because of the similarity of thinking and working with microorganisms other than bacteria, such as protozoa, fungi, and non-microorganism viruses, there has been a tendency for the field of bacteriology to extend as microbiology. The terms were formerly often used interchangeably. However, bacteriology can be classified as a distinct science. Overview Definition Bacteriology is the study of bacteria and their relation to medicine. Bacteriology evolved from physicians needing to apply the Germ theory of disease, germ theory to address the concerns relating to disease spreading in hospitals the 19th century. Identification and characterizing of bacteria being associ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacques-Joseph Grancher
Jacques-Joseph Grancher (; 29 September 1843 in Felletin, Creuse – 13 July 1907) was a French pediatrician born in Felletin. In 1862 he began his medical studies in Paris, where he worked as an assistant at the Hôpital des Enfants Malades (under Eugène Bouchut), the Hôpital de la Charité, the Hôpital de la Pitié and Lariboisière Hospital (under Paul Jules Tillaux). He learned histological techniques with Louis-Antoine Ranvier and Victor André Cornil in their private laboratory on ''Rue Christine'', and for several years served as director of a pathological anatomy laboratory in Clamart (1868–1878). From 1885 until his death in 1907, he was director of Hôpital des Enfants Malades. In 1900 he was elected vice-chairman of the board of directors at the Pasteur Institute. Grancher is remembered for his research of tuberculosis. He was a pioneer in the creation of safeguards for the prevention of childhood tuberculosis, and was an advocate of isolation and ant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Chamberland
Charles Edouard Chamberland (; 12 March 1851 – 2 May 1908) was a French microbiologist from Chilly-le-Vignoble in the department of Jura who worked with Louis Pasteur. Chamberland was present at Pouilly-le-Fort when the efficacy of the anthrax vaccine, which he had made with Emile Roux, was validated. Following this success, Chamberland was put in charge of mass-producing the anthrax vaccine. In 1884 he developed a type of filtration known today as the Chamberland filter or Chamberland-Pasteur filter, a device that made use of an unglazed porcelain bar. The filter had pores that were smaller than bacteria, thus making it possible to pass a solution containing bacteria through the filter, and having the bacteria completely removed from the solution. Chamberland was also credited for starting a research project that led to the invention of the autoclave An autoclave is a machine used to carry out industrial and scientific processes requiring elevated temperature and press ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grape Vine
''Vitis'' (grapevine) is a genus of 81 accepted species of vining plants in the flowering plant family Vitaceae. The genus consists of species predominantly from the Northern Hemisphere. It is economically important as the source of grapes, both for direct consumption of the fruit and for fermentation to produce wine. The study and cultivation of grapevines is called viticulture. Most cultivated ''Vitis'' varieties are wind-pollinated with hermaphroditic flowers containing both male and female reproductive structures, while wild species are dioecious. These flowers are grouped in bunches called inflorescences. In many species, such as ''Vitis vinifera'', each successfully pollinated flower becomes a grape berry with the inflorescence turning into a cluster of grapes. While the flowers of the grapevines are usually very small, the berries are often large and brightly colored with sweet flavors that attract birds and other animals to disperse the seeds contained within the berri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphid
Aphids are small sap-sucking insects in the Taxonomic rank, family Aphididae. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white Eriosomatinae, woolly aphids. A typical life cycle involves flightless females giving Viviparity, live birth to female Nymph (biology), nymphs—who may also be already Pregnancy, pregnant, an adaptation scientists call telescoping generations—without the involvement of males. Developmental biology, Maturing rapidly, females breed profusely so that the number of these insects multiplies quickly. Alate, Winged females may develop later in the season, allowing the insects to colonize new plants. In Temperate climate, temperate regions, a phase of sexual reproduction occurs in the autumn, with the insects often overwintering as eggs. The life cycle of some species involves an alternation between two species of host plants, for example between an annual crop and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylloxera
Grape phylloxera is an insect pest of grapevines worldwide, originally native to eastern North America. Grape phylloxera (''Daktulosphaira vitifoliae'' (Fitch 1855) belongs to the family Phylloxeridae, within the order Hemiptera, bugs); originally described in France as ''Phylloxera vastatrix''; equated to the previously described ''Daktulosphaera vitifoliae'', ''Phylloxera vitifoliae''. The insect is commonly just called phylloxera (; from , leaf, and , dry). These almost microscopic, pale yellow sap-sucking insects, related to aphids, feed on the roots and leaves of grapevines (depending on the phylloxera genetic strain). On ''Vitis vinifera'', the resulting deformations on roots ("nodosities" and "tuberosities") and secondary fungal infections can girdle roots, gradually cutting off the flow of nutrients and water to the vine.Wine & Spirits Education Trust ''"Wine and Spirits: Understanding Wine Quality"'' pgs 2–5, Second Revised Edition (2012), London, Nymphs also for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spontaneous Generation
Spontaneous generation is a superseded scientific theory that held that living creatures could arise from non-living matter and that such processes were commonplace and regular. It was hypothesized that certain forms, such as fleas, could arise from inanimate matter such as dust, or that maggots could arise from dead flesh. The doctrine of spontaneous generation was coherently synthesized by the Greek philosopher and naturalist Aristotle, who compiled and expanded the work of earlier natural philosophers and the various ancient explanations for the appearance of organisms. Spontaneous generation was taken as scientific fact for two millennia. Though challenged in the 17th and 18th centuries by the experiments of the Italian biologists Francesco Redi and Lazzaro Spallanzani, it was not discredited until the work of the French chemist Louis Pasteur and the Irish physicist John Tyndall in the mid-19th century. Among biologists, rejecting spontaneous genesis is no longer con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silkworm
''Bombyx mori'', commonly known as the domestic silk moth, is a moth species belonging to the family Bombycidae. It is the closest relative of '' Bombyx mandarina'', the wild silk moth. Silkworms are the larvae of silk moths. The silkworm is of particular economic value, being a primary producer of silk. The silkworm's preferred food are the leaves of white mulberry, though they may eat other species of mulberry, and even leaves of other plants like the Osage orange. Domestic silk moths are entirely dependent on humans for reproduction, as a result of millennia of selective breeding. Wild silk moths, which are other species of ''Bombyx'', are not as commercially viable in the production of silk. Sericulture, the practice of breeding silkworms for the production of raw silk, has existed for at least 5,000 years in China, whence it spread to India, Korea, Nepal, Japan, and then the West. The conventional process of sericulture kills the silkworm in the pupal stage. The domestic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diastase
A diastase (; from Greek διάστασις, "separation") is any one of a group of enzymes that catalyses the breakdown of starch into maltose. For example, the diastase α-amylase degrades starch to a mixture of the disaccharide maltose; the trisaccharide maltotriose, which contains three α (1-4)-linked glucose residues; and oligosaccharides, known as dextrins, that contain the α (1-6)-linked glucose branches. Diastase was the first enzyme discovered. It was extracted from malt solution in 1833 by Anselme Payen and Jean-François Persoz, chemists at a French sugar factory. The name "diastase" comes from the Greek word διάστασις (''diastasis'') (a parting, a separation), because when beer mash is heated, the enzyme causes the starch in the barley seed to transform quickly into soluble sugars and hence the husk to separate from the rest of the seed. Today, "diastase" refers to any α-, β-, or γ-amylase (all of which are hydrolases) that can break down carbohydra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-François Persoz
Jean-François Persoz (9 June 1805–September 1868) was a French chemist known for discovering the enzyme diastase and on the properties of dextrin. He also wrote a report that coined the name cellulose. Born in Cortaillod, Persoz studied physical science in Paris under Louis Jacques Thénard and received his doctorate in 1833. Persoz was a professor of chemistry at the University of Strasbourg since 1833 and then a professor of dyeing and calico-printing at the Conservatoire des Arts et Metiers since 1852. His work on diastase, also known as amylase, was carried out in collaboration with Anselme Payen Anselme Payen (; 6 January 1795 – 12 May 1871) was a French chemist known for discovering the enzyme diastase, and the carbohydrate cellulose. Biography Payen was born in Paris. He began studying science with his father when he was a 13-yea ... and published in 1833. His work on dextrin was carried out in collaboration with J.B. BiotBiot, J. B., Persoz, J.: Ann. Chim. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anselme Payen
Anselme Payen (; 6 January 1795 – 12 May 1871) was a French chemist known for discovering the enzyme diastase, and the carbohydrate cellulose. Biography Payen was born in Paris. He began studying science with his father when he was a 13-year-old, and later studied Chemistry at the École Polytechnique under the chemists Louis Nicolas Vauquelin and Michel Eugène Chevreul. At the age of 23, Payen became manager of a borax-refining factory, where he developed a process for synthesizing borax from soda and boric acid. Previously, all borax had been imported from the East Indies exclusively by the Dutch. Payen's new method of synthesizing borax allowed him to sell the mineral at one third the going price, and break the Dutch monopoly. Payen also developed processes for refining sugar, along with a way to refine starch and alcohol from potatoes, and a method for determination of nitrogen. Payen invented a decolorimeter, which dealt with the analysis, decolorization, bleaching, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
