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1869 In Science
The year 1869 in science and technology involved some significant events, listed below. Events * November 4 – The first issue of scientific journal ''Nature'' is published in London, edited by Norman Lockyer. Chemistry * March 6 – Dmitri Mendeleev makes a formal presentation of his periodic table to the Russian Chemical Society. * June 15 – John Wesley Hyatt patents celluloid, in Albany, New York. * July 15 – Hippolyte Mège-Mouriès files a patent for margarine (as ''oleomargarine'') in France as a beef tallow and skimmed milk substitute for butter. * German chemist Lothar Meyer makes a formal presentation of the revised and expanded version of his independently-created 1864 periodic table, „Die Natur der chemischen Elemente als Funktion ihrer Atomgewichte". * Publication of Adolphe Wurtz's ''Dictionnaire de chimie pure et appliquée'' begins in Paris. Life sciences * April 6 – The American Museum of Natural History is founded in New York. * June 24 – Sea Birds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science
Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence for scientific reasoning is tens of thousands of years old. The earliest written records in the history of science come from Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE. Their contributions to mathematics, astronomy, and medicine entered and shaped Greek natural philosophy of classical antiquity, whereby formal attempts were made to provide explanations of events in the physical world based on natural causes. After the fall of the Western Roman Empire, knowledge of Greek conceptions of the world deteriorated in Western Europe during the early centuries (400 to 1000 CE) of the Middle Ages, but was preserved in the Muslim world during the Islamic Golden Age and later by the efforts of Byzantine Greek scholars who brought Greek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris
Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, fashion, gastronomy, and science. For its leading role in the arts and sciences, as well as its very early system of street lighting, in the 19th century it became known as "the City of Light". Like London, prior to the Second World War, it was also sometimes called the capital of the world. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an estimated population of 12,262,544 in 2019, or about 19% of the population of France, making the region France's primate city. The Paris Region had a GDP of €739 billion ($743 billion) in 2019, which is the highest in Europe. According to the Economist Intelli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Miller Beard
George Miller Beard (May 8, 1839 – January 23, 1883) was an American neurologist who popularized the term neurasthenia, starting around 1869. Biography Beard was born in Montville, Connecticut, on May 8, 1839, to Reverend Spencer F. Beard, a Congregational minister, and Lucy A. Leonard. Beard's mother died in 1842, and his father remarried the following year: to Mary Ann Fellowes.''Notable People from Montville’s Past: Dr. George M. Beard, Neurologist Extraordinaire, Donna Jacobson, 2011. Beard graduated from Yale College in 1862, and received his medical degree from the College of Physicians and Surgeons of New York in 1866. While still in medical school during the American Civil War, he served as an assistant surgeon in the West Gulf squadron of the United States Navy aboard the gunboat ''New London''. After the war, and upon his graduation from medical school, he married Elizabeth Ann Alden of Westville, Connecticut on December 25, 1866.''Dictionary of American Biog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psychiatry
Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial psychiatric assessment of a person typically begins with a case history and mental status examination. Physical examinations and psychological tests may be conducted. On occasion, neuroimaging or other neurophysiological techniques are used. Mental disorders are often diagnosed in accordance with clinical concepts listed in diagnostic manuals such as the ''International Classification of Diseases'' (ICD), edited and used by the World Health Organization (WHO) and the widely used '' Diagnostic and Statistical Manual of Mental Disorders'' (DSM), published by the American Psychiatric Association (APA). The fifth edition of the DSM (DSM-5) was published in May 2013 which re-organized the larger categories of various diseases and expanded upon the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psychopathology
Psychopathology is the study of abnormal cognition, behaviour, and experiences which differs according to social norms and rests upon a number of constructs that are deemed to be the social norm at any particular era. Biological psychopathology is the study of the biological etiology of abnormal cognitions, behaviour and experiences. Child psychopathology is a specialisation applied to children and adolescents. Animal psychopathology is a specialisation applied to non-human animals. This concept is linked to the philosophical ideas first outlined by Galton (1869) and is linked to the appliance of eugenical ideations around what constitutes the human. History Early explanations for mental illnesses were influenced by religious belief and superstition. Psychological conditions that are now classified as mental disorders were initially attributed to possessions by evil spirits, demons, and the devil. This idea was widely accepted up until the sixteenth and seventeenth centuries. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neurasthenia
Neurasthenia (from the Ancient Greek νεῦρον ''neuron'' "nerve" and ἀσθενής ''asthenés'' "weak") is a term that was first used at least as early as 1829 for a mechanical weakness of the nerves and became a major diagnosis in North America during the late nineteenth and early twentieth centuries after neurologist George Miller Beard reintroduced the concept in 1869. As a Psychopathology, psychopathological term, the first to publish on neurasthenia was Michigan Psychiatrist, alienist E. H. Van Deusen of the Kalamazoo asylum in 1869, followed a few months later by New York neurologist George Beard, also in 1869, to denote a condition with symptoms of fatigue (physical), fatigue, anxiety, headache, heart palpitations, high blood pressure, neuralgia, and depression (mood), depressed mood. Van Deusen associated the condition with farm wives made sick by isolation and a lack of engaging activity, while Beard connected the condition to busy society women and overworked busi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclein
Nucleic acids are biopolymers, macromolecules, essential to all known forms of life. They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous base. The two main classes of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). If the sugar is ribose, the polymer is RNA; if the sugar is the ribose derivative deoxyribose, the polymer is DNA. Nucleic acids are naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells and make up the genetic material. Nucleic acids are found in abundance in all living things, where they create, encode, and then store information of every living cell of every life-form on Earth. In turn, they function to transmit and express that information inside and outside the cell nucleus to the interior operations of the cell and ultimately to the next generation of each living organism. The encoded information is co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Miescher
Johannes Friedrich Miescher (13 August 1844 – 26 August 1895) was a Swiss physician and biologist. He was the first scientist to isolate nucleic acid in 1869. He also identified protamine and made a number of other discoveries. Miescher had isolated various phosphate-rich chemicals, which he called ''nuclein'' (now nucleic acids), from the nuclei of white blood cells in Felix Hoppe-Seyler's laboratory at the University of Tübingen, Germany, paving the way for the identification of DNA as the carrier of inheritance. The significance of the discovery, first published in 1871, was not at first apparent, and Albrecht Kossel made the initial inquiries into its chemical structure. Later, Miescher raised the idea that the nucleic acids could be involved in heredity and even posited that there might be something akin to an alphabet that might explain how variation is produced. Early life and education Friedrich Miescher came from a scientific family; his father and his uncle held th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pancreatic Islets
The pancreatic islets or islets of Langerhans are the regions of the pancreas that contain its endocrine (hormone-producing) cells, discovered in 1869 by German pathological anatomist Paul Langerhans. The pancreatic islets constitute 1–2% of the pancreas volume and receive 10–15% of its blood flow. The pancreatic islets are arranged in density routes throughout the human pancreas, and are important in the metabolism of glucose. Structure There are about 1 million islets distributed throughout the pancreas of a healthy adult human, each of which measures an average of about 0.2 mm in diameter.:928 Each islet is separated from the surrounding pancreatic tissue by a thin fibrous connective tissue capsule which is continuous with the fibrous connective tissue that is interwoven throughout the rest of the pancreas.:928 Microanatomy Hormones produced in the pancreatic islets are secreted directly into the blood flow by (at least) five types of cells. In rat islets, endocrin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul Langerhans
Paul Langerhans (25 July 1847 – 20 July 1888) was a German pathologist, physiologist and biologist, credited with the discovery of the cells that secrete insulin, named after him as the islets of Langerhans. Eponymous terms * Islets of Langerhans – Pancreatic cells which include insulin-producing cells. Langerhans discovered these cells during his studies for his doctorate at the Berlin Pathological Institute in 1869. * Langerhans cells – Skin cells concerned with the immune response and which sometimes contain Langerhans granules. In 1868, Langerhans used the technique taught to him by Julius Friedrich Cohnheim to stain a sample of human skin with gold chloride and identified the cells which bear his name. From their appearance, Langerhans believed they were nerve cells. However they are a form of macrophages that were originally thought to be dendritic cells due to their morphology. * Layer of Langerhans – In the same paper in which he described Langerhans cells, he d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ibis (journal)
''Ibis'' (formerly ''The Ibis''), subtitled ''the International Journal of Avian Science'', is the peer-reviewed scientific journal of the British Ornithologists' Union. It was established in 1859. Topics covered include ecology, conservation, behaviour, palaeontology, and taxonomy of birds. The editor-in-chief is Dominic J. McCafferty (University of Glasgow). The journal is published by Wiley-Blackwell in print and online. It is available free on the internet for institutions in the developing world through the OARE scheme (Online Access to Research in the Environment). History In 1858 the British Ornithologists' Union (BOU) was formed. It was the first organization, devoted solely to the study of birds. One year later members of the BOU founded a (Quarterly) "Magazine of General Ornithology," entitled ''The Ibis''. Series and editors * Series 1 was published from 1859 to 1864, in six volumes and 24 issues. The first editor was Philip Lutley Sclater (1829–1913).Sep. ixv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
