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Juglans Hopeiensis
''Juglans hopeiensis'' (), also known as Ma walnut, is a species of walnut native to northern Hebei Province. Some scholars believe that the species is a hybrid of Juglans regia and Juglans mandshurica. Currently, it is a threatened tree species. Historically, Ma walnut was originally distributed in the Northern Taihang Mountains of Hebei Province, so it was called Hebei walnut (河北核桃). This species is mainly distributed in some mountainous areas of Hebei Province, Shanxi Province, Beijing and Tianjin in China. Morphological characteristics Ma walnut, whose scientific name is ''Juglans hopeiensis Hu'', is a plant belonging to the genus Juglans of the family Juglandaceae. The plant can reach up to 2.5 meters high and often grow in high mountains. Its bark is gray-white with longitudinal cracks. Discovery and Naming In 1930, Zhou Hanfan (周汉藩) discovered this new species in Banjiegou, Xiakou Village, Changping County, Hebei Province (now part of Beijing). Subsequently ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hu Xiansu
Hu Xiansu or Hu Hsien-Hsu (, 24 May 1894 – 16 July 1968), was a Chinese botanist and an influential traditional scholar of his time. He was a founder of plant taxonomy in China and a pioneer of modern botany research in the country. Education and career Hu Xiansu studied preparatory course at Imperial University of Peking in 1909. In 1912 after the Xinhai Revolution, 1911 Revolution he went to America, and graduated from University of California, Berkeley in 1916. In 1918, he became a faculty member of National Nanking Higher Normal School and then National Southeastern University (later renamed National Central University and Nanking University). He went to America again in 1923 and received a doctor's degree from Harvard University in 1925. His wife died in Nanking in 1926, then he resigned from Department of Biology of Southeastern University and became a full-time research fellow at Institute of Biology of China Science Society. He cofounded Fan Memorial Institute of Biology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meter
The metre (British spelling) or meter (American spelling; see spelling differences) (from the French unit , from the Greek noun , "measure"), symbol m, is the primary unit of length in the International System of Units (SI), though its prefixed forms are also used relatively frequently. The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference is approximately km. In 1799, the metre was redefined in terms of a prototype metre bar (the actual bar used was changed in 1889). In 1960, the metre was redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86. The current definition was adopted in 1983 and modified slightly in 2002 to clarify that the metre is a measure of proper length. From 1983 until 2019, the metre was formally defined as the length of the path travelled by light in a vacuum in of a second. After the 2019 rede ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of China
The flora of China consists of a diverse range of plant species including over 39,000 vascular plants, 27,000 species of fungi and 3000 species of bryophytes.Wu, Z. Y., P. H. Raven & D. Y. Hong, eds. 2006. Flora of China. Vol. 22 (Poaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis More than 30,000 plant species are native to China, representing nearly one-eighth of the world's total plant species, including thousands found nowhere else on Earth. China's land, extending over 9.6 million km, contains a variety of ecosystems and climates for plants to grow in. Some of the main climates include shores, tropical and subtropical forests, deserts, elevated plateaus and mountains. The events of the continental drift and early Paleozoic Caledonian movement also play a part in creating climatic and geographical diversity resulting in high levels of endemic vascular flora. These landscapes provide different ecosystems and climates for plants to grow in, crea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of Asia
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world. A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Juglans
Walnut trees are any species of tree in the plant genus ''Juglans'', the type genus of the family Juglandaceae, the seeds of which are referred to as walnuts. All species are deciduous trees, tall, with pinnate leaves , with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnuts (''Pterocarya''), but not the hickories (''Carya'') in the same family. The 21 species in the genus range across the north temperate Old World from southeast Europe east to Japan, and more widely in the New World from southeast Canada west to California and south to Argentina. Edible walnuts, which are consumed worldwide, are usually harvested from cultivated varieties of the species '' Juglans regia''. China produces half of the world total of walnuts. Etymology The common name ''walnut'' derives from Old English ''wealhhnutu'', literally 'foreign nut' (from ''wealh'' 'foreign' + ''hnutu'' 'nut'), because it was introduced from Gaul and Italy. The Latin name for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fitoterapia
''Fitoterapia'' is a peer-reviewed medical journal covering research on the use of medicinal plants and bioactive natural products of plant origin in pharmacotherapy. According to the ''Journal Citation Reports'', ''Fitoterapia'' has a 2021 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as ... of 3.204.. Since 2023 the Editor in Chief is prof. Orazio Taglialatela-Scafati. References External links * English-language journals Elsevier academic journals Publications established in 1930 Pharmacology journals {{pharma-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ScienceDirect
ScienceDirect is a website which provides access to a large bibliographic database of scientific and medical publications of the Dutch publisher Elsevier. It hosts over 18 million pieces of content from more than 4,000 academic journals and 30,000 e-books of this publisher. The access to the full-text requires subscription, while the bibliographic metadata is free to read. ScienceDirect is operated by Elsevier. It was launched in March 1997. Usage The journals are grouped into four main sections: ''Physical Sciences and Engineering'', ''Life Sciences'', ''Health Sciences'', and ''Social Sciences and Humanities''. Article abstracts are freely available, and access to their full texts (in PDF and, for newer publications, also HTML) generally requires a subscription or pay-per-view purchase unless the content is freely available in open access. Subscriptions to the overall offering hosted on ScienceDirect, rather than to specific titles it carries, are usually acquired thro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Plant Germplasm System
The U.S. National Plant Germplasm System (NPGS) is a network of institutions and agencies (federal, state and private) led by the Agricultural Research Service (ARS) of the U.S. Department of Agriculture in the effort to conserve and facilitate the use of the genetic diversity of agriculturally important plants and their wild relatives. Introduction Tremendous genetic variability exists in the local varieties (landraces) of crops and their closely related wild plants (crop wild relatives). The NPGS assists plant breeders and other research scientists by acquiring, conserving, evaluating, documenting, and distributing germplasm (seeds and other propagative material) of these plants, as well as of improved cultivars and breeding lines. This diverse germplasm provides the genetic raw material needed by plant breeders to develop new varieties of crops that have desirable qualities and can withstand constantly changing biological and environmental stresses. Conservation and use of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agricultural Research Service
The Agricultural Research Service (ARS) is the principal in-house research agency of the United States Department of Agriculture (USDA). ARS is one of four agencies in USDA's Research, Education and Economics mission area. ARS is charged with extending the nation's scientific knowledge and solving agricultural problems through its four national program areas: nutrition, food safety and quality; animal production and protection; natural resources and sustainable agricultural systems; and crop production and protection. ARS research focuses on solving problems affecting Americans every day. The ARS Headquarters is located in the Jamie L. Whitten Building on Independence Avenue in Washington, D.C. and the headquarters staff is located at the George Washington Carver Center (GWCC) in Beltsville, Maryland. For 2018, its budget was $1.2 billion. Mission ARS conducts scientific research for the American public. Their main focus is on research to develop solutions to agricultural pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frontiers In Plant Science
''Frontiers in Plant Science'' is a peer-reviewed scientific journal covering all aspects of botany. It was established in 2010 and is published by Frontiers Media. The editor-in-chief is Yunde Zhao (University of California, San Diego). Abstracting and indexing Since 2019, the journal has a score of 2 in the Norwegian Scientific Index, which "covers the most prestigious and rigorous channels, which publish 20 percent of the publications". According to the Frontiers, the journal Frontiers in Plant Science 2021 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as ... is 6.627. References External links * {{Official website, https://www.frontiersin.org/journals/plant-science Publications established in 2010 English-language journals Botany journals Frontiers Med ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botanist
Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word (''botanē'') meaning "pasture", "herbs" "grass", or " fodder"; is in turn derived from (), "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists (in the strict sense) study approximately 410,000 species of land plants of which some 391,000 species are vascular plants (including approximately 369,000 species of flowering plants), and approximately 20,000 are bryophytes. Botany originated in prehistory as herbalism with the efforts of early humans to identify – and later cultivate – edible, med ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zhou Hanfan
Zhou may refer to: Chinese history * King Zhou of Shang () (1105 BC–1046 BC), the last king of the Shang dynasty * Predynastic Zhou (), 11th-century BC precursor to the Zhou dynasty * Zhou dynasty () (1046 BC–256 BC), a dynasty of China ** Western Zhou () (1046 BC–771 BC) ** Eastern Zhou () (770 BC–256 BC) * Western Zhou (state) () (440 BC–256 BC) * Eastern Zhou (state) () (367 BC–249 BC) * Northern Zhou () (557–581), one of the Northern dynasties during the Northern and Southern dynasties period * Wu Zhou () (690–705), an imperial dynasty established by Wu Zetian * Later Zhou () (951–960), the last of the Five dynasties during the Five Dynasties and Ten Kingdoms period * Zhou (Zhang Shicheng's kingdom) () (1354–1367), a state founded by Zhang Shicheng during the Red Turban Rebellion * Zhou (Qing period state) () (1678–1681), a state founded by Wu Sangui during the Qing dynasty Other uses *Zhou (surname) (), Chinese surname *Zhou (country subdivision) (), a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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