Particules en suspension Visualisation des catégories de particules en suspension dans l'air ou aéroportées (contaminants biologiques, ou particulaires minéraux ou organiques, ou gazeux)... par nature et taille (en micromètres ; μm) Les particules en suspension sont toutes les particules (solides ou en aérosols) portées par l'eau ou par l'air, quantifiables par filtration ou par d'autres procédés physiques. Elles sont - dans leur ensemble - désormais classées cancérigènes pour l'homme (groupe 1) par le Centre international de recherche sur le cancer (CIRC)[1]. Les PM (pour matières particulaires d'après l'expression Particulate Matter(en)) désignent les particules en suspension dans l'atmosphère terrestre[2]. Un taux élevé de particules fines et ultrafines dans l'air est facteur de risque sanitaires (maladies cardio-vasculaires, altération des fonctions pulmonaires, cancer du poumon). Sources[modifier | modifier le code] Les particules sont d'origines anthropiques et/ou naturelles. 1. 2. 3.
Sensaris - Wireless sensors Internet of things solutions. Pentachlorophenol Chemical compound Pentachlorophenol (PCP) is an organochlorine compound used as a pesticide and a disinfectant. First produced in the 1930s, it is marketed under many trade names.[5] It can be found as pure PCP, or as the sodium salt of PCP, the latter of which dissolves easily in water. Uses[edit] PCP has been used as a herbicide, insecticide, fungicide, algaecide, and disinfectant and as an ingredient in antifouling paint.[5] Some applications were in agricultural seeds (for nonfood uses), leather, masonry, wood preservation, cooling-tower water, rope, and paper. Two general methods are used for preserving wood. Pentachlorophenol esters can be used as active esters in peptide synthesis, much like more popular pentafluorophenyl esters. Exposure[edit] People may be exposed to PCP in occupational settings through the inhalation of contaminated workplace air and dermal contact with wood products treated with PCP. Toxicity[edit] Monitoring of human exposure[edit] Synthesis[edit] Chile[edit]
Build a Rocket Stove for Home Heating Author’s note, 2015-02-14: Based on the interest I’ve received in this project, I’m considering selling plans for a stove similar to the one described in this article. See the Rocket Stove Plans section at the end of the article and let me know if you’d be interested. Original article: For some time I’ve been considering the best way to deal with a pile of scrap wood that has been growing next to my home, the result of many woodworking and carpentry projects I’ve been involved in over the years. A few options I have considered are: taking it to the landfillcutting it into chips and using it as mulchburning it From a climate change standpoint, the latter of these is surprisingly the least harmful in the long run. Burning also has a side benefit. Ads by Google Warnings Fire is dangerous. 0. 1. 2. 3. 4. How is a rocket stove different from a regular wood stove? The following illustration shows the basic design. Construction Rocket stove mass heaters are often built from steel drums. Does it work?
AirCasting Opium Dried latex obtained from the opium poppy The production methods have not significantly changed since ancient times. Through selective breeding of the Papaver somniferum plant, the content of the phenanthrene alkaloids morphine, codeine, and to a lesser extent thebaine has been greatly increased. In modern times, much of the thebaine, which often serves as the raw material for the synthesis for oxycodone, hydrocodone, hydromorphone, and other semisynthetic opiates, originates from extracting Papaver orientale or Papaver bracteatum. For the illegal drug trade, the morphine is extracted from the opium latex, reducing the bulk weight by 88%. History[edit] The Mediterranean region contains the earliest archeological evidence of human use; the oldest known seeds date back to more than 5000 BCE in the Neolithic age[7] with purposes such as food, anaesthetics, and ritual. Ancient use (pre-500 CE)[edit] Dioscorides, Introduction to The Herbal of Dioscorides the Greek England[edit] China[edit]
Particulate Emission in Rocket Mass Heaters... Looking for Data!!! (rocket mass heater forum at permies) I was looking for scientific publications on anything closely relating a rocket mass heater just the other day. The closest thing I could find were journal publications on particulate emissions for masonry heaters. The studies were typically performed in Europe. How I found the articles (abstract only typically): scholar.google.com did a search on 'masonry heaters' To my knowledge, I don't think anyone has done any particulate/aerosol studies on RMH. A quick solution maybe an electrostatic precipitator. Yet, in the greater picture forest fires are way more polluting/particulate generating than residential fireplaces.
Air pollution monitoring stations face closure as government looks to cut costs | Environment Up to 600 stations for monitoring air pollution across England could be shut down under new government plans to save money by cutting regulations. Ministers want to remove obligations on local authorities to assess air quality in their areas, resulting in less monitoring. But environmental campaigners are accusing them of trying to hide one of the country's biggest public health problems. Government advisers have estimated that one type of pollutant – miniscule particles from diesel engines, fossil fuel power stations and other sources – is killing 29,000 people a year in the UK, and costing health services about £16bn. But European air pollution limits meant to protect health are being breached in urban areas across the country, with the highest levels in London. According to the Department for Environment Food and Rural Affairs (Defra), the limits for the toxic exhaust gas, nitrogen dioxide, were exceeded in 40 of the UK's 43 air quality zones in 2010.
Opisthorchis viverrini Species of fluke Opisthorchis viverrini, common name Southeast Asian liver fluke, is a food-borne trematode parasite from the family Opisthorchiidae that infects the bile duct. People are infected after eating raw or undercooked fish.[2] Infection with the parasite is called opisthorchiasis. O. viverrini infection also increases the risk of cholangiocarcinoma, a cancer of the bile ducts.[3] O. viverrini (together with Clonorchis sinensis and Opisthorchis felineus) is one of the three most medically important species in the family Opisthorchiidae.[4] In fact O. viverrini and C. sinensis are capable of causing cancer in humans, and are classified by the International Agency for Research on Cancer as a group 1 biological carcinogen in 2009.[5][6][7] O. viverrini is found in Thailand, the Laos, Vietnam, and Cambodia.[8] It is most widely distributed in northern Thailand, with high prevalence in humans, while central Thailand has a low rate of prevalence.[9][10] Discovery[edit] Lifecycle[edit]
Le poêle à bois : danger ou alternative ? Alliant véritable confort de chauffe selon l’isolation de la maison et besoins de chauffage, le poêle à bois est particulièrement simple à installer, puisqu’il suffit qu’il soit raccordé à un conduit d’évacuation. Offrant des performances de chauffe exceptionnelles qui permettent d’élever la température d’une pièce en très peu de temps, jouissant d’une installation facile et modifiable, le poêle à bois reste-t-il un bon moyen de passer l’hiver au chaud ? Le rendement d’un poêle à bois est de 60 % à 80 %, en moyenne par rapport aux cheminées à foyer ouvert, dont le rendement ne dépasse pas 20 %. Il permet en effet, une combustion rapide et diffusion rapide de la chaleur. Toutefois, depuis quelques temps, la question des émissions de particules générées par les poêles et leur impact sur l’environnement et la santé est vivement débattue. Un poêle à bois non certifié émet autant de particules fines en neuf heures d’utilisation qu’une voiture au Canada qui parcourt 18.000 km dans une année
Bittorrent in a P2P social network Phenacetin Pharmaceutical drug Phenacetin (acetophenetidin, N-(4-ethoxyphenyl)acetamide[1]) is a pain-relieving and fever-reducing drug, which was widely used following its introduction in 1887. It was withdrawn from medicinal use as dangerous from the 1970s (e.g., withdrawn in Canada in 1973,[2] and by the U.S. Food and Drug Administration in 1983[3]). History[edit] Phenacetin was introduced in 1887 in Elberfeld, Germany by German company Bayer, and was used principally as an analgesic; it was one of the first synthetic fever reducers to go on the market. Prior to World War One, Britain imported phenacetin from Germany.[5] During the war, a team including Jocelyn Field Thorpe and Martha Annie Whiteley developed a synthesis in Britain.[5] Known mechanism of action[edit] Phenacetin's analgesic effects are due to its actions on the sensory tracts of the spinal cord. In vivo, one of two reactions occur. Preparation[edit] The first synthesis was reported in 1878 by Harmon Northrop Morse. Uses[edit] Bucetin