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Emmer Wheat
Emmer wheat or hulled wheat is a type of awned wheat. Emmer is a tetraploid (4''n'' = 4''x'' = 28 chromosomes). The domesticated types are ''Triticum turgidum'' subsp. ''dicoccum'' and ''Triticum turgidum ''conv.'' durum''. The wild plant is called ''Triticum turgidum'' subsp. ''dicoccoides''. The principal difference between the wild and the domestic is that the ripened seed head of the wild plant shatters and scatters the seed onto the ground, while in the domesticated emmer the seed head remains intact, thus making it easier for humans to harvest the grain. Along with einkorn wheat, emmer was one of the first crops domesticated in the Near East. It was widely cultivated in the ancient world, but is now a relict crop in mountainous regions of Europe and Asia. Emmer is considered a type of ''farro'' food especially in Italy. Taxonomy Strong similarities in morphology and genetics show that wild emmer (''Triticum dicoccoides'' Koern.) is the wild ancestor and a crop wild r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franz Paula Von Schrank
Franz von Paula Schrank (21 August 1747, in Vornbach – 22 December 1835) was a German priest, botanist and entomologist. He was ordained as a priest in Vienna in 1784, gaining his doctorate in theology two years later. In 1786 he was named chair of mathematics and physics at the lyceum in Amberg, and in 1784 became a professor of botany and zoology at the University of Ingolstadt (later removed to Landshut). at Catholic Encyclopedia Schrank was the first director of the botanical gardens in from 1809 to 1832. Schrank was the first author to use the name '' |
Friedrich August Körnicke
Friedrich August Körnicke (29 January 1828 – 16 January 1908) was a German agronomist and botanist born in Pratau (now a part of Wittenberg, Saxony-Anhalt). He was the father of agricultural botanist Max Koernicke (1874–1955). Körnicke studied sciences at Humboldt University of Berlin, where in 1856 he earned his doctorate. As a student he participated in numerous botanical field trips, and at the university was influenced by distinguished botanists that included Alexander Braun (1805–1877) and Johannes von Hanstein (1822–1880). After graduation, he worked as curator of the herbarium at the botanical gardens in St. Petersburg. From 1858 to 1867 he taught classes at the ''Landwirtschaftlichen Akademie Waldau'' (Waldau Agricultural Academy) near Königsberg. Afterwards he was successor to Julius Sachs (1832–1897) as professor of botany at the Agricultural Academy of Poppelsdorf in Bonn, a position he maintained until 1898. Körnicke was a leading authority on cere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fertile Crescent
The Fertile Crescent ( ar, الهلال الخصيب) is a crescent-shaped region in the Middle East, spanning modern-day Iraq, Syria, Lebanon, Israel, Palestine and Jordan, together with the northern region of Kuwait, southeastern region of Turkey and the western portion of Iran. Some authors also include Cyprus and Northern Egypt. The Fertile Crescent is believed to be the very first region where settled farming emerged as people started the process of clearance and modification of natural vegetation to grow newly domesticated plants as crops. Early human civilizations such as Sumer in Mesopotamia flourished as a result. Technological advances in the region include the development of agriculture and the use of irrigation, of writing, the wheel, and glass, most emerging first in Mesopotamia. Terminology The term "Fertile Crescent" was popularized by archaeologist James Henry Breasted in ''Outlines of European History'' (1914) and ''Ancient Times, A History of the Early W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science (journal)
''Science'', also widely referred to as ''Science Magazine'', is the peer-reviewed academic journal of the American Association for the Advancement of Science (AAAS) and one of the world's top academic journals. It was first published in 1880, is currently circulated weekly and has a subscriber base of around 130,000. Because institutional subscriptions and online access serve a larger audience, its estimated readership is over 400,000 people. ''Science'' is based in Washington, D.C., United States, with a second office in Cambridge, UK. Contents The major focus of the journal is publishing important original scientific research and research reviews, but ''Science'' also publishes science-related news, opinions on science policy and other matters of interest to scientists and others who are concerned with the wide implications of science and technology. Unlike most scientific journals, which focus on a specific field, ''Science'' and its rival ''Nature (journal), Nature'' c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frog Kick
Finning techniques are the skills and methods used by swimmers and underwater divers to propel themselves through the water and to maneuver when wearing swimfins. There are several styles used for propulsion, some of which are more suited to particular swimfin configurations. There are also techniques for positional maneuvering, such as rotation on the spot, which may not involve significant locational change. Use of the most appropriate finning style for the circumstances can increase propulsive efficiency, reduce fatigue, improve precision of maneuvering and control of the diver's position in the water, and thereby increase the task effectiveness of the diver and reduce the impact on the environment. Propulsion through water requires much more work than through air due to higher density and viscosity. Diving equipment which is bulky usually increases drag, and reduction of drag can significantly reduce the effort of finning. This can be done to some extent by streamlining diving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shattering (agriculture)
In agriculture, shattering is the dispersal of a crop's seeds upon their becoming ripe. From an agricultural perspective this is generally an undesirable process, and in the history of crop domestication several important advances have involved a mutation in a crop plant that reduced shattering—instead of the seeds being dispersed as soon as they were ripe, the mutant plants retained the seeds for longer, which made harvesting much more effective. Non-shattering phenotype is one of the prerequisites for plant breeding especially when introgressing valuable traits from wild varieties of domesticated crops. A particularly important mutation that was selected very early in the history of agriculture removed the "brittle rachis" problem from wheat. A ripe head ("ear") of wild-type wheat is easily shattered into dispersal units when touched, or blown by the wind, because during ripening a series of abscission layers forms that divides the rachis into short segments, each attached to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glume
In botany, a glume is a bract (leaf-like structure) below a spikelet in the inflorescence (flower cluster) of grasses (Poaceae) or the flowers of sedges (Cyperaceae). There are two other types of bracts in the spikelets of grasses: the lemma and palea. In grasses, two bracts known as "glumes" form the lowermost organs of a spikelet (there are usually two but one is sometimes reduced; or rarely, both are absent). Glumes may be similar in form to the lemmas, the bracts at the base of each floret This glossary of botanical terms is a list of definitions of terms and concepts relevant to botany and plants in general. Terms of plant morphology are included here as well as at the more specific Glossary of plant morphology and Glossary o .... In sedges, by contrast, a glume is a scale at the base of each flower in a spikelet. References {{reflist Plant morphology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spelt
Spelt (''Triticum spelta''), also known as dinkel wheat or hulled wheat, is a species of wheat that has been cultivated since approximately 5000 BC. Spelt was an important staple food in parts of Europe from the Bronze Age to medieval times. Now it survives as a relict crop in Central Europe and northern Spain, and it has found a new market as a health food. Spelt is sometimes considered a subspecies of the closely related species common wheat (''Triticum aestivum''), in which case its botanical name is considered to be ''Triticum aestivum'' subsp. ''spelta''. Like common wheat, it is a hexaploid wheat, which means it has six sets of chromosomes. Evolution Spelt has a complex history. It is a wheat species known from genetic evidence to have originated as a naturally occurring hybrid of a domesticated tetraploid wheat such as emmer wheat and the wild goat-grass '' Aegilops tauschii''. Genetic evidence shows that spelt wheat can also arise as the result of the hybridisation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rachis
In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this case the ''rachis'' usually forms the supporting axis of the body and is then called the spine or vertebral column. ''Rachis'' can also mean the central shaft of pennaceous feathers. In the gonad of the invertebrate nematode '' Caenorhabditis elegans'', a rachis is the central cell-free core or axis of the gonadal arm of both adult males and hermaphrodites where the germ cells have achieved pachytene and are attached to the walls of the gonadal tube. The rachis is filled with cytoplasm. In botany In plants, a rachis is the main axis of a compound structure. It can be the main stem of a compound leaf, such as in ''Acacia'' or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle. Where it subdivides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israel (region)
The Land of Israel () is the traditional Jewish name for an area of the Southern Levant. Related biblical, religious and historical English terms include the Land of Canaan, the Promised Land, the Holy Land, and Palestine (see also Israel (other)). The definitions of the limits of this territory vary between passages in the Hebrew Bible, with specific mentions in Genesis 15, Exodus 23, Numbers 34 and Ezekiel 47. Nine times elsewhere in the Bible, the settled land is referred as "from Dan to Beersheba", and three times it is referred as "from the entrance of Hamath unto the brook of Egypt" (1 Kings 8:65, 1 Chronicles 13:5 and 2 Chronicles 7:8). These biblical limits for the land differ from the borders of established historical Israelite and later Jewish kingdoms, including the United Kingdom of Israel, the two kingdoms of Israel (Samaria) and Judah, the Hasmonean Kingdom, and the Herodian kingdom. At their heights, these realms ruled lands with similar but not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
