Urticaceae
Urtica dioica
Urticaceae pollen concentration in the atmosphere of North Western Spain. (1/12)
Plants of the Urticaceae family can develop into a pest on soils enriched with nitrogen. Urticaceae pollen is a biohazard because it elicits severe pollinosis. Pollen grains were sampled by using a Lanzoni seven-day-recording trap from February 1995-December 2000 in the atmosphere of the city of Ponferrada (Leon, North Western Spain). The Spearman test was used to analyse the statistical correlation between Urticaceae pollen and certain meteorological factors in different main pollination periods. Maximum values are reached in June and July, minimum levels are recorded in January and December. The parameters bearing the greatest positive influence on the occurrence of Urticaceae pollen grains are: temperature (maximum, minimum and mean), humidity (absolute, wet-bulb temperature, dew point and mixing ratio) and south western wind direction; negative parameters are: relative humidity, rainfall and period without wind. The highest correlation coefficients were obtained with temperature and wet-bulb. Absolute humidity and wet-bulb temperature yielded better correlation than relative humidity; hence, these two parameters must be included in this type of study. The use of one main pollination period or another in statistical analysis has an influence on the coefficient value. The behaviour of the pollen grains in the atmosphere during the year also influences the results. (+info)Identification of oxalic acid and tartaric acid as major persistent pain-inducing toxins in the stinging hairs of the nettle, Urtica thunbergiana. (2/12)
BACKGROUND AND AIMS: Once human skin contacts stinging hairs of Urtica spp. (stinging nettles), the irritant is released and produces pain, wheals or a stinging sensation which may last for >12 h. However, the existence of pain-inducing toxins in the stinging hairs of Urtica thunbergiana has never been systematically demonstrated. Experiments were therefore conducted to identify the persistent pain-inducing agents in the stinging hairs of U. thunbergiana. METHODS: The stinging hairs of U. thunbergiana were removed and immersed in deionized water. After centrifugation, the clear supernatants were then subjected to high-performance liquid chromatography (HPLC), enzymatic analysis and/or behavioural bioassays. KEY RESULTS: The HPLC results showed that the major constituents in the stinging hairs of U. thunbergiana were histamine, oxalic acid and tartaric acid. However, the well-recognized pain-inducing agents, serotonin and formic acid, existed at a low concentration as estimated by HPLC and/or enzymatic analyses. The behavioural tests showed that 2% oxalic acid and 10% tartaric acid dramatically elicited persistent pain sensations in rats. In contrast, 10% formic acid and 2% serotonin only elicited moderate pain sensation in the first 10 min. Moreover, no significant pain-related behavioural response was observed after injecting 10% acetylcholine and histamine in rats. CONCLUSIONS: Oxalic acid and tartaric acid were identified, for the first time, as major long-lasting pain-inducing toxins in the stinging hairs of U. thunbergiana. The general view that formic acid, histamine and serotonin are the pain-inducing agents in the stinging hairs of U. dioica may require updating, since their concentrations in U. thunbergiana were too low to induce significant pain sensation in behavioural bioassays. (+info)New chemical constituents of roots of Urtica triangularis HAND-MASS. (3/12)
Studies on the chemical constituents of roots of Urtica triangularis HAND-MASS have led to the isolation of four new compounds. The structures, including the absolute configurations, of these constituents have been elucidated through spectral studies including (1)H-NMR, (13)C-NMR, 2D-NMR experiments (heteronuclear single-quantum coherence, heteronuclear multiple bonding connectivity and nuclear Overhauser effect spectroscopy), high resolution mass spectroscopy (HR-MS) and circular dichroism as (-)-4-methoxy-8'-acetyl olivil, (-)-4-methoxy-8'-acetyl olivil-4-O-alpha-arabinopyronosyl-(1-->6)-beta-glucopyranoside, (-)-olivil-9-O-beta-glucopyranoside and cyclo-olivil-9-O-beta-glucopyranoside. (+info)Aroma-active compounds of Elatostema laetevirens and Elatostema umbellatum var. majus. (4/12)
The essential oils from aerial parts of Elatostema laetevirens and Elatostema umbellatum var. majus were investigated by capillary GC and GC-MS. The important aroma-active compounds were also detected in the oil using GC-MS/O and aroma extraction dilution analysis (AEDA). As a result, 79 compounds of E. laetevirens and 80 compounds of E. umbellatum var. majus, accounting for 95.41% and 98.37%, were identified, respectively. The major components of E. laetevirens oil were phytol (667.4 microg/100 g fresh samples), neophytadiene (335.2 microg) and gamma-himachalene (49.8 microg). On the other hand, E. umbellatum var. majus oil contained phytol (402.3 microg), linoleic acid (289.4 microg) and palmitic acid (241.4 microg) as the major components. GC-MS/O and AEDA showed that (2E)-hexenal and (2E, 4E)-nonadienal were most aroma compounds of E. laetevirens oil. It seems that these components make the green-floral odor. On the other hands, it seems that (2E)-hexenal, (3Z)-hexenol and 1-octen-3-ol make the green-oily odor of E. umbellatum var. majus oil. (+info)Alternative therapy for autosensitization dermatitis. (5/12)
(+info)Characterization and quantification of polyphenols in Amazon grape (Pourouma cecropiifolia Martius). (6/12)
(+info)Antioxidant rich flavonoids from Oreocnide integrifolia enhance glucose uptake and insulin secretion and protects pancreatic beta-cells from streptozotocin insult. (7/12)
(+info)Morphology and behavior of the early stages of the skipper, Urbanus esmeraldus, on Urera baccifera, an ant-visited host plant. (8/12)
(+info)I believe there might be some confusion in your question. "Urticaceae" is not a medical term, but a taxonomic category in botany. It refers to the nettle family of flowering plants, which includes around 980 species across 52 genera. Some members of this family, such as stinging nettles (Urtica dioica), can cause skin irritation and rashes, but "Urticaceae" itself is not a medical term or condition.
"Urtica dioica," also known as stinging nettle, is a plant species native to Europe, Asia, North Africa, and North America. While it doesn't have a formal medical definition, it is widely used in herbal medicine. The leaves and stems of the plant contain various compounds, including histamine, acetylcholine, serotonin, and forms of nitrogen like formic acid, which can cause a stinging sensation when they come into contact with human skin.
In medical contexts, Urtica dioica extracts are sometimes used to treat conditions such as allergies, joint pain, and urinary tract infections. However, it's important to note that the scientific evidence supporting these uses is generally limited, and more research is needed to confirm their effectiveness and safety. As with any medical treatment or supplement, individuals should consult with a healthcare provider before using Urtica dioica for therapeutic purposes.
Pollen, in a medical context, refers to the fine powder-like substance produced by the male reproductive organ of seed plants. It contains microscopic grains known as pollen grains, which are transported by various means such as wind, water, or insects to the female reproductive organ of the same or another plant species for fertilization.
Pollen can cause allergic reactions in some individuals, particularly during the spring and summer months when plants release large amounts of pollen into the air. These allergies, also known as hay fever or seasonal allergic rhinitis, can result in symptoms such as sneezing, runny nose, congestion, itchy eyes, and coughing.
It is important to note that while all pollen has the potential to cause allergic reactions, certain types of plants, such as ragweed, grasses, and trees, are more likely to trigger symptoms in sensitive individuals.
Urticaceae - Wikipedia
Flora of Zimbabwe: Checklist: Urticaceae]
Urticaceae - Wikipedia
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Urticaceae
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Nettle family: Pollenwarndienst
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Urtica - Wikipedia bahasa Indonesia, ensiklopedia bebas
Urtica2
- The Urticaceae include a number of well-known and useful plants, including nettles in the genus Urtica, ramie (Boehmeria nivea), māmaki (Pipturus albidus), and ajlai (Debregeasia saeneb). (wikipedia.org)
- Urtica adalah genus tumbuhan berbunga dalam famili Urticaceae . (wikipedia.org)
Genus3
- Five New Species of the Genus Pilea (Urticaceae) from Southern China [J]. Bulletin of Botanical Research, 2017, 37(6): 801-806. (nefu.edu.cn)
- Notes on the genus Elatostema (Urticaceae) of China [J]. Bulletin of Botanical Research, 2016, 36(5): 641-646. (nefu.edu.cn)
- This name is the accepted name of a species in the genus Musanga (family Urticaceae ). (theplantlist.org)
Rosales2
- The APG II system puts the Urticaceae in the order Rosales, while older systems consider them part of the Urticales, along with Ulmaceae, Moraceae, and Cannabaceae. (wikipedia.org)
- APG II system puts Urticaceae in order Rosales, while aulder seestems consider it pairt of Urticales , along wi Ulmaceae , Moraceae an Cannabaceae . (wikipedia.org)
Nettle2
- The Urticaceae /ɜːrtɪˈkeɪsiː/ are a family, the nettle family, of flowering plants. (wikipedia.org)
- Urticaceae , or the nettle faimily, is a faimily o flouerin plants . (wikipedia.org)
Species7
- Urticaceae species can be found worldwide, apart from the polar regions. (wikipedia.org)
- Urticaceae species can be shrubs (e.g. (wikipedia.org)
- One New Species of Pellionia and Two New Species of Elatostema (Urticaceae) from Chongqing[J]. Bulletin of Botanical Research, 2017, 37(5): 641-644. (nefu.edu.cn)
- One New Section and Three new species of Elatostema (Urticaceae) from Chongqing [J]. Bulletin of Botanical Research, 2018, 38(6): 804-808. (nefu.edu.cn)
- Elatostema kimhyense (Urticaceae),A New Species from Vietnam [J]. Bulletin of Botanical Research, 2017, 37(3): 321-324. (nefu.edu.cn)
- Two New Species of Urticaceae from Xizang [J]. Bulletin of Botanical Research, 2016, 36(5): 647-649. (nefu.edu.cn)
- Two New Species of Urticaceae from China [J]. Bulletin of Botanical Research, 2016, 36(4): 481-483. (nefu.edu.cn)
Boehmeria1
- Urticaceae include a nummer o well-kent an uiseful plants, includin the aforementioned nettles, ramie ( Boehmeria nivea ), māmaki ( Pipturus albidus ), an ajlai ( Debregeasia saeneb ). (wikipedia.org)
Juss1
- Urticaceae Juss. (wikipedia.org)
Polar regions1
- Urticaceae can be foond warldwide, apart frae the polar regions. (wikipedia.org)
Record1
- The fossil record of Urticaceae is scattered and mostly based on dispersed fruits. (wikipedia.org)
Subject1
- Urticaceae" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (uchicago.edu)
Pilea2
- This name is the accepted name of a species in the genus Pilea (family Urticaceae ). (theplantlist.org)
- [2] Ang Pilea angustifolia sakop sa kahenera nga Pilea , ug kabanay nga Urticaceae . (wikipedia.org)
Nettle family1
- The Urticaceae /ɜːrtɪˈkeɪsiː/ are a family, the nettle family, of flowering plants. (wikipedia.org)
Family1
- According to Prof. Hugh TW Tan and Prof. RT Corlett , both from the School of Biological Sciences, National University of Singapore, the plant is Poikilospermum suaveolens (Family: Urticaceae), an epiphytic climber. (besgroup.org)
Laportea1
- Laportea Urticaceae. (open.ac.uk)
Stinging2
- Stinging hairs in Urticaceae have a distinct bulbous or cylindric base and a stiff, translucent apex. (asu.edu)
- The compounds producing the stinging sensation caused by contact with some members of Urticaceae have been reported to be histamine, acetylcholine, 5-hydroxytryptamine, and, in extracts from which the other three have been removed, an unknown substance that produces pain (E. L. Thurston and N. R. Lersten 1969). (asu.edu)
Flora1
- I tried with keys in Flora of Bhutan at Urticaceae. (efloraofindia.com)