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Richard Kräusel
Richard Oswald Karl Kräusel (29 August 1890 in Breslau – 25 November 1966 in Frankfurt am Main) was a German paleobotanist. He studied botany at the University of Breslau as a pupil of Ferdinand Albin Pax, and in 1913 received his doctorate with the thesis ''Beiträge zur kenntnis der Holzer aus der schlesischen Braunkohle'' ("On wood from Silesian lignite"). From 1920 to 1952 he worked as a lecturer and professor at the University of Frankfurt. He was also associated with the Senckenberg Natural History Museum in Frankfurt, where he served as head of the department of paleobotany. During World War II his collections of fossil plants were stored in a nearby castle for safekeeping; unfortunately these collections were destroyed during bombing raids on Frankfurt.Kräusel, Richard In: |
Hermann Weyland
Hermann Gerhard Weyland (25 March 1888 in Sankt Ingbert – 20 January 1974 in Wuppertal) was a German chemist and botanist. In collaboration with Richard Kräusel, he carried out significant paleobotanical investigations of Devonian flora. He obtained his education at the University of Jena, receiving his doctorate in 1912 under the direction of Christian Ernst Stahl. Following graduation, he worked as assistant to Wilhelm Pfeffer at the University of Leipzig and under Ludwig Knorr in Jena. From 1915 to 1952 he worked as a chemist at Bayer in Wuppertal-Elberfeld, being named head of its physiology laboratory in 1924. In 1931 he became an honorary professor at the University of Cologne, where in 1945–48 he served as interim director of the botanical institute.BHL Taxonomic literature : a selective guide to botanical publications< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academic Staff Of Goethe University Frankfurt
An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of tertiary education. The name traces back to Plato's school of philosophy, founded approximately 386 BC at Akademia, a sanctuary of Athena, the goddess of wisdom and skill, north of Athens, Greece. The Royal Spanish Academy defines academy as scientific, literary or artistic society established with public authority and as a teaching establishment, public or private, of a professional, artistic, technical or simply practical nature. Etymology The word comes from the ''Academy'' in ancient Greece, which derives from the Athenian hero, '' Akademos''. Outside the city walls of Athens, the gymnasium was made famous by Plato as a center of learning. The sacred space, dedicated to the goddess of wisdom, Athena, had formerly been an olive grove, hence the expression "the groves of Academe". In these gardens, the philosopher Plato conversed with followers. Plato developed his session ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Breslau Alumni
A university () is an institution of tertiary education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase , which roughly means "community of teachers and scholars". Universities typically offer both undergraduate and postgraduate programs. The first universities in Europe were established by Catholic monks. The University of Bologna (), Italy, which was founded in 1088, is the first university in the sense of: *being a high degree-awarding institute. *using the word (which was coined at its foundation). *having independence from the ecclesiastic schools and issuing secular as well as non-secular degrees (with teaching conducted by both clergy and non-clergy): grammar, rhetoric, logic, theology, canon law and notarial law.Hunt Janin: "The university in medieval life, 1179–1499", McFarland, 2008, , p. 55f.de Ridder-Symoens, Hilde''A History of the University in Europe: Volume 1, Universities in the Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientists From Wrocław
A scientist is a person who researches to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. Though Thales ( 624–545 BC) was arguably the first scientist for describing how cosmic events may be seen as natural, not necessarily caused by gods,Frank N. Magill''The Ancient World: Dictionary of World Biography'', Volume 1 Routledge, 2003 it was not until the 19th century that the term ''scientist'' came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833. History The roles of "scientists", and their predecessors before the emergence of modern scientific disciplines, have evolved considerably over time. Scientists of different eras (and before them, natural philosophers, mathematicians, natur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1966 Deaths
Events January * January 1 – In a coup, Colonel Jean-Bédel Bokassa takes over as military ruler of the Central African Republic, ousting President David Dacko. * January 3 – 1966 Upper Voltan coup d'état: President Maurice Yaméogo is deposed by a military coup in the Republic of Upper Volta (modern-day Burkina Faso). * January 10 ** Pakistani–Indian peace negotiations end successfully with the signing of the Tashkent Declaration, a day before the sudden death of Indian prime minister Lal Bahadur Shastri. ** Georgia House of Representatives, The House of Representatives of the US state of Georgia refuses to allow African-American representative Julian Bond to take his seat, because of his anti-war stance. * January 15 – 1966 Nigerian coup d'état: A bloody military coup is staged in Nigeria, deposing the civilian government and resulting in the death of Prime Minister Abubakar Tafawa Balewa. * January 17 ** The Nigerian coup is overturned by another faction of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1890 Births
Events January * January 1 – The Kingdom of Italy establishes Eritrea as its colony in the Horn of Africa. * January 2 – Alice Sanger becomes the first female staffer in the White House. * January 11 – 1890 British Ultimatum: The United Kingdom demands Portugal withdraw its forces from the land between the Portuguese colonies of Portuguese Mozambique, Mozambique and Portuguese Angola, Angola (most of present-day Zimbabwe and Zambia). * January 15 – Ballet ''The Sleeping Beauty (ballet), The Sleeping Beauty'', with music by Pyotr Ilyich Tchaikovsky, Tchaikovsky, is premiered at the Mariinsky Theatre, Imperial Mariinsky Theatre in Saint Petersburg, St. Petersburg, Russia. * January 25 ** The United Mine Workers of America is founded. ** American journalist Nellie Bly completes her round-the-world journey in 72 days. February * February 5 – The worldwide insurance and financial service brand Allianz is founded in Berlin, Germany. * February 18 – The National Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermann Merxmüller
Hermann Merxmüller (30 August 1920 Munich – 8 February 1988) was a German botanist and taxonomist. Merxmüller's interest in botany was noticed at an early age by his mentors, and he was encouraged to collect in the Bavarian Alps and countryside. At 17 he joined the Bavarian Botanical Society and at the end of World War II was awarded a scholarship by the Maximilian Foundation, enabling him to study biology at the University of Munich. He completed his studies with a dissertation on plant distribution in the Alps, then taking up a post as scientific assistant at the Botanische Staatsammlung. Here the institute's director, Karl Suessenguth, employed him to assist in the creation of a prodromus or introductory treatise on Namibian plants, "''Prodromus einer Flora von Südwestafrika''". Merxmüller’s interests led him to the genus ''Hieracium'', and eventually to an abiding interest in the family Compositae. He visited Namibia on five occasions, collecting mostly in the comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Devonian
The Early Devonian is the first of three epochs comprising the Devonian period, corresponding to the Lower Devonian series. It lasted from and began with the Lochkovian Stage , which was followed by the Pragian from and then by the Emsian, which lasted until the Middle Devonian began, . During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed little from their nautiloid counterparts. These ammonoids belong to the order Agoniatitida, which in later epochs evolved to new ammonoid orders, for example Goniatitida and Clymeniida. This class of cephalopod molluscs would dominate the marine fauna until the beginning of the Mesozoic The Mesozoic Era is the Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian r ... Era. References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ninth and longest geological period of the entire Phanerozoic. The name is derived from the Latin , 'chalk', which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation . The Cretaceous was a period with a relatively warm climate, resulting in high Sea level#Local and eustatic, eustatic sea levels that created numerous shallow Inland sea (geology), inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was largely ice-free, although there is some evidence of brief periods of glaciation during the cooler first half, and forests extended to the poles. Many of the dominant taxonomic gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Cuticle
A plant cuticle is a protecting film covering the outermost skin layer (epidermis) of leaves, young shoots and other aerial plant organs (aerial here meaning all plant parts not embedded in soil or other substrate) that have no '' periderm''. The film consists of lipid and hydrocarbon polymers infused with wax, and is synthesized exclusively by the epidermal cells. Kolattukudy, PE (1996) Biosynthetic pathways of cutin and waxes, and their sensitivity to environmental stresses. In: Plant Cuticles. Ed. by G. Kerstiens, BIOS Scientific publishers Ltd., Oxford, pp 83-108 Description The plant cuticle is a layer of lipid polymers impregnated with waxes that is present on the outer surfaces of the primary organs of all vascular land plants. It is also present in the sporophyte generation of hornworts, and in both sporophyte and gametophyte generations of mosses. The plant cuticle forms a coherent outer covering of the plant that can be isolated intact by treating plant tissue with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angiosperm
Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed within a fruit. The group was formerly called Magnoliophyta. Angiosperms are by far the most diverse group of land plants with 64 orders, 416 families, approximately 13,000 known genera and 300,000 known species. They include all forbs (flowering plants without a woody stem), grasses and grass-like plants, a vast majority of broad-leaved trees, shrubs and vines, and most aquatic plants. Angiosperms are distinguished from the other major seed plant clade, the gymnosperms, by having flowers, xylem consisting of vessel elements instead of tracheids, endosperm within their seeds, and fruits that completely envelop the seeds. The ancestors of flowering plants diverged from the common ancestor of all living gymnosperms before the end of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
