|
Khamar-Daban Incident
On 5 August 1993, six Kazakhstani hikers died in the Khamar-Daban mountain range under uncertain circumstances. The event has been likened to the Dyatlov Pass incident, earning it the name "Buryatia's Dyatlov Pass". The six hikers who died were members of a seven-person hiking group led by Lyudmila Korovina; Valentina Utochenko was the group's sole survivor. Despite the police receiving a report, no formal search was carried out until 24 August. It took two days for helicopters to locate the remains, because Utochenko had not yet been able to recount her version of what had happened. According to an autopsy report, all of the victims died of hypothermia, except Korovina, who died from a heart attack. Background Khamar-Daban, a mountain range in southern Siberia, in the Republic of Buryatia, Russia, was a popular tourist hiking spot. In the summer of 1993, Lyudmila Korovina of the Petropavl "Azimut" tourist club, an experienced hiking instructor and a Master of Sports of Russia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khamar-Daban
Khamar-Daban (; , from – "nut", and – "pass" or "ridge"), is a mountain range in Southern Siberia, Russia. Geography The range is located in Buryatia, with a small section in Irkutsk Oblast. It rises near the Baikal Mountains not far from Lake Baikal. It forms a geographic prolongation of the Sayan Mountains. The highest peak is Utulinskaya Podkova at ; high Chersky Peak is another important summit. The southern end of the range is part of the Selenga Highlands. The climate of the northern part of the range is affected by Lake Baikal, being temperate and humid, with precipitation up to per year. The average January temperature is . Climate In popular culture The song of the same name by Yuri Vizbor, written in 1962, is dedicated to the range. See also *Baikal Nature Reserve *South Siberian Mountains *Khamar-Daban incident References External links * Mountain ranges of Russia Landforms of Siberia Landforms of Buryatia Landforms of Irkutsk Oblast South Siber ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulmonary Edema
Pulmonary edema (British English: oedema), also known as pulmonary congestion, is excessive fluid accumulation in the tissue or air spaces (usually alveoli) of the lungs. This leads to impaired gas exchange, most often leading to shortness of breath ( dyspnea) which can progress to hypoxemia and respiratory failure. Pulmonary edema has multiple causes and is traditionally classified as cardiogenic (caused by the heart) or noncardiogenic (all other types not caused by the heart). Various laboratory tests ( CBC, troponin, BNP, etc.) and imaging studies (chest x-ray, CT scan, ultrasound) are often used to diagnose and classify the cause of pulmonary edema. Treatment is focused on three aspects: * improving respiratory function, * treating the underlying cause, and * preventing further damage and allow full recovery to the lung. Pulmonary edema can cause permanent organ damage, and when sudden (acute), can lead to respiratory failure or cardiac arrest due to hypoxia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volvariella Volvacea
''Volvariella volvacea'' (also known as paddy straw mushroom or straw mushroom) is a species of edible mushroom cultivated throughout East and Southeast Asia and used extensively in Asian cuisine. They are often available fresh in regions they are cultivated, but elsewhere are more frequently found canned or dried. Worldwide, straw mushrooms are the third-most-consumed mushroom. Description In their button stage, straw mushrooms resemble poisonous death caps, but can be distinguished by several mycological features, including their pink spore print (spore prints of death caps are white). The two mushrooms have different distributions, with the death cap generally not found where the straw mushroom grows natively, but immigrants, particularly those from Southeast Asia to California and Australia, have been poisoned due to misidentification. Uses Straw mushrooms are grown on rice straw beds and are most commonly picked when immature (often labelled "unpeeled"), during their b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Destroying Angel
The name destroying angel applies to several similar, closely related species of deadly all-white mushrooms in the genus ''Amanita''. They are '' Amanita virosa'' in Europe and '' A. bisporigera'' and '' A. ocreata'' in eastern and western North America, respectively. Another European species of ''Amanita'' referred to as the destroying angel, '' Amanita verna''—also referred to as the "Fool's mushroom"—was first described in France in 1780. Destroying angels are among the most toxic known mushrooms; both they and the closely related death caps (''A. phalloides'') contain amatoxins. Description Destroying angels are characterized by having gills and white stalks. The cap can be pure white, or white at the edge and yellowish, pinkish, or tan at the center. It has a partial veil, or ring ( annulus) circling the upper stalk, and the gills are "free", not attached to the stalk. Perhaps the most telltale of the features is the presence of a volva, or universal veil, so called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amanita Phalloides
''Amanita phalloides'' ( ), commonly known as the death cap, is a deadly poisonous basidiomycete fungus and mushroom, one of many in the genus ''Amanita''. Originating in Europe but later introduced to other parts of the world since the late twentieth century, ''A. phalloides'' forms ectomycorrhizas with various broadleaved trees. In some cases, the death cap has been introduced to new regions with the cultivation of non-native species of oak, chestnut, and pine. The large fruiting bodies (mushrooms) appear in summer and autumn; the caps are generally greenish in colour with a white stipe and gills. The cap colour is variable, including white forms, and is thus not a reliable identifier. These toxic mushrooms resemble several edible species (most notably Caesar's mushroom and the straw mushroom) commonly consumed by humans, increasing the risk of accidental poisoning. Amatoxins, the class of toxins found in these mushrooms, are thermostable: they resist changes due t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amanita
The genus ''Amanita'' contains about 600 species of agarics, including some of the most toxic known mushrooms found worldwide, as well as some well-regarded Edible mushroom, edible species (and many species of unknown edibility). The genus is responsible for approximately 95% of fatalities resulting from mushroom poisoning, with the death cap accounting for about 50% on its own. The most potent toxin present in these mushrooms is . The genus also contains many edible mushrooms, but mycologists discourage mushroom hunters, other than experts, from selecting any of these for human consumption. Nonetheless, in some cultures, the larger local edible species of ''Amanita'' are mainstays of the markets in the local growing season. Samples of this are ''Amanita zambiana'' and other fleshy species in central Africa, ''Amanita basii, A. basii'' and similar species in Mexico, ''Amanita caesarea, A. caesarea'' and the "Blusher" ''Amanita rubescens, A. rubescens'' in Europe, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ibotenic Acid
Ibotenic acid or (''S'')-2-amino-2-(3-hydroxyisoxazol-5-yl)acetic acid, also referred to as ibotenate, is a naturally occurring alpha-amino acid found in certain ''Amanita'' mushrooms, that primarily acts as a potent glutamate receptor agonist that precipitates neurological effects and is used experimentally as a brain-lesioning agent in mice and rats. Ibotenic acid is a conformationally-restricted analogue of glutamate that acts as a non-selective glutamate receptor agonist, strongly activating NMDA, group I and II metabotropic glutamate receptors, and weakly activating AMPA and kainate receptors. It is a prodrug of muscimol, broken down by the liver into this more stable compound, which acts as a potent GABAA and GABAA-ρ receptor agonist. Although its psychoactive effects are not well understood, some researchers speculate that ibotenic acid itself may have stimulant properties. Ibotenic acid is biosynthesized from glutamic acid by hydroxylation catalyzed by an F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscarine
Muscarine, L-(+)-muscarine, or muscarin is a Secondary metabolite, natural product found in certain mushrooms, particularly in ''Inocybe'' and ''Clitocybe'' species, such as the deadly ''Clitocybe dealbata, C. dealbata''. Mushrooms in the genera ''Entoloma'' and ''Mycena'' have also been found to contain levels of muscarine which can be dangerous if ingested. Muscarine has been found in harmless trace amounts in the genera ''Boletus'', ''Hygrocybe'', ''Lactarius (fungus), Lactarius'' and ''Russula''. Trace concentrations of muscarine are also found in ''Amanita muscaria'', though the pharmacologically more relevant compound from this mushroom is the Z-drug-like alkaloid muscimol. ''A. muscaria'' basidiocarp, fruitbodies contain a variable dose of muscarine, usually around 0.0003% fresh weight. This is very low and toxicity symptoms occur very rarely. ''Inocybe'' and ''Clitocybe'' contain muscarine concentrations up to 1.6%. Muscarine is a selective agonist of the muscar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toxicology
Toxicology is a scientific discipline, overlapping with biology, chemistry, pharmacology, and medicine, that involves the study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating exposures to toxins and toxicants. The relationship between dose and its effects on the exposed organism is of high significance in toxicology. Factors that influence chemical toxicity include the dosage, duration of exposure (whether it is acute or chronic), route of exposure, species, age, sex, and environment. Toxicologists are experts on poisons and poisoning. There is a movement for evidence-based toxicology as part of the larger movement towards evidence-based practices. Toxicology is currently contributing to the field of cancer research, since some toxins can be used as drugs for killing tumor cells. One prime example of this is ribosome-inactivating proteins, tested in the treatment of leukemia. The word ''toxicology'' () ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Baikal
Lake Baikal is a rift lake and the deepest lake in the world. It is situated in southern Siberia, Russia between the Federal subjects of Russia, federal subjects of Irkutsk Oblast, Irkutsk Oblasts of Russia, Oblast to the northwest and the Republic of Buryatia to the southeast. At —slightly larger than Belgium—Lake Baikal is the world's List of lakes by area, seventh-largest lake by surface area, as well as the second largest lake in Eurasia after the Caspian Sea. However, because it is also the List of lakes by depth, deepest lake, with a maximum depth of , Lake Baikal is the world's List of lakes by volume, largest freshwater lake by volume, containing of water or 22–23% of the world's fresh surface water, more than all of the North American Great Lakes combined. It is also the world's ancient lake, oldest lake at 25–30 million years, and among the clearest. It is estimated that the lake contains around 19% of the unfrozen fresh water on the planet. Lake Baikal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baikal Lakuaren M-ko Muturra
Lake Baikal is a rift lake and the deepest lake in the world. It is situated in southern Siberia, Russia between the federal subjects of Irkutsk Oblast to the northwest and the Republic of Buryatia to the southeast. At —slightly larger than Belgium—Lake Baikal is the world's seventh-largest lake by surface area, as well as the second largest lake in Eurasia after the Caspian Sea. However, because it is also the deepest lake, with a maximum depth of , Lake Baikal is the world's largest freshwater lake by volume, containing of water or 22–23% of the world's fresh surface water, more than all of the North American Great Lakes combined. It is also the world's oldest lake at 25–30 million years, and among the clearest. It is estimated that the lake contains around 19% of the unfrozen fresh water on the planet. Lake Baikal is home to thousands of species of plants and animals, many of them endemic to the region. It is also home to Buryat tribes, who raise goats, cam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
