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Definition
 
enEnglish
Carbon Dioxide definition: A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
carbon dioxide definition: colorless, odorless gas, CO2, resulting from oxidation of carbon, formed by the tissues; necessary for the respiration cycle of plants and animals.
Nitrogen Dioxide definition: Nitrogen oxide (NO2). A highly poisonous gas. Exposure produces inflammation of lungs that may only cause slight pain or pass unnoticed, but resulting edema several days later may cause death. (From Merck, 11th ed) It is a major atmospheric pollutant that is able to absorb UV light that does not reach the earth's surface.
Nitrogen Dioxide definition: Found in the atmosphere as a key ingredient in photochemical formation of smog and acid rain, Nitrogen Dioxide is a poisonous gas that forms during combustion. Toxic at high concentrations, it reacts with moisture in the air to form nitric acid, highly corrosive and hazardous to plants and animals. (NCI04)
Piroxicam definition: A cyclooxygenase inhibiting, non-steroidal anti-inflammatory agent (NSAID) that is well established in treating rheumatoid arthritis and osteoarthritis and used for musculoskeletal disorders, dysmenorrhea, and postoperative pain. Its long half-life enables it to be administered once daily.
piroxicam definition: 4-hydroxy-2-methyl-N-2-pyridyl-2H-1,2- benzothiazine-3-carboxamide- 1,1-dioxide; nonsteroidal antiinflammatory drug (NSAID) which functions by inhibiting prostaglandin synthesis; effective against colon cancer.
piroxicam definition: A nonsteroidal oxicam derivative with anti-inflammatory, antipyretic and analgesic properties. As a non-selective, nonsteroidal anti-inflammatory drug (NSAID), piroxicam binds and chelates both isoforms of cyclooxygenases (COX1 and COX2), thereby stalling phospholipase A2 activity and conversion of arachidonic acid into prostaglandin precursors at the rate limiting cyclooxygenase enzyme step. This results in inhibition of prostaglandin biosynthesis. As a second, independent effect, piroxicam inhibits the activation of neutrophils thereby contributing to its overall anti-inflammatory effects. Check for "http://www.cancer.gov/Search/ClinicalTrialsLink.aspx?id=39761&idtype=1" active clinical trials or "http://www.cancer.gov/Search/ClinicalTrialsLink.aspx?id=39761&idtype=1&closed=1" closed clinical trials using this agent. ("http://nciterms.nci.nih.gov:80/NCIBrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&code=C751" NCI Thesaurus)
Piroxicam definition: A nonsteroidal oxicam derivative with anti-inflammatory, antipyretic and analgesic properties. As a non-selective, nonsteroidal anti-inflammatory drug (NSAID), piroxicam binds and chelates both isoforms of cyclooxygenases (COX1 and COX2), thereby stalling phospholipase A2 activity and conversion of arachidonic acid into prostaglandin precursors at the rate limiting cyclooxygenase enzyme step. This results in inhibition of prostaglandin biosynthesis. As a second, independent effect, piroxicam inhibits the activation of neutrophils thereby contributing to its overall anti-inflammatory effects.
Silicon Dioxide definition: Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
Silica definition: A natural compound of silicon and oxygen found mostly in sand, Silica has three main crystalline varieties: quartz, tridymite, and cristobalite. Fine particulate silica dust from quartz rock causes over a long-term progressive lung injury, silicosis. (NCI04)
Sulfur Dioxide definition: A highly toxic, colorless, nonflammable gas. It is used as a pharmaceutical aid and antioxidant. It is also an environmental air pollutant.
Thorium Dioxide definition: Thorium oxide (ThO2). A radiographic contrast agent that was used in the early 1930s through about 1954. High rates of mortality have been linked to its use and it has been shown to cause liver cancer.
1,4-Dioxane definition: A synthetic, volatile, colorless liquid that is miscible with water, most organic solvents, aromatic hydrocarbons and oils. It is used primarily as a stabilizer in chlorinated solvents. 1,4-Dioxane is also used as a solvent for numerous commercial products and as a wetting/dispersing agent in textile processing. In research, it is used in certain biological procedures such as liquid scintillation counting and the preparation of histological sections for microscopic examination. The primary routes of potential human exposure to 1,4-dioxane are inhalation, ingestion and dermal contact. Acute exposure to low levels of 1,4-dioxane vapors causes eye and nose irritation. Exposure to very high levels of these vapors can result in liver and kidney damage and death. It is reasonably anticipated to be a human carcinogen. (NCI05)
4-Vinyl-1-cyclohexene Diepoxide definition: A synthetic, colorless liquid that is soluble in water. It is used as a reactive diluent for other epoxides and as a monomer in the production of epoxy resins for coatings and adhesives. Occupational exposure of humans to 4-vinyl-1-cyclohexene diepoxide results in skin irritation. It is reasonably anticipated to be a human carcinogen. (NCI05)
Diepoxybutane definition: A colorless, highly flammable, liquid cyclic ether. Diepoxybutane is primarily used for research purposes, but is also used as a curing agent for polymer resins and as a cross-linking agent for making synthetic textile fibers. Exposure to this substance can severely irritate and burn the eyes and skin and can cause liver damage. Diepoxybutane is reasonably anticipated to be a human carcinogen based on evidence of carcinogenicity in experimental animals. (NCI05)
Dorzolamide definition: An inhibitor of carbonic anhydrase, a zinc-containing enzyme that catalyzes the rapid conversion of carbon dioxide and water into carbonic acid, protons and bicarbonate ions. Distributed throughout many cells and tissues, various carbonic anhydrases play important roles in mineral and metabolic homeostasis. (NCI04)
ABSORBENT, CARBON-DIOXIDE definition: A carbon dioxide absorbent is a device intended for medical purposes that consists of an absorbent material (e.g., soda lime) that is intended to remove carbon dioxide from the gases in the breathing circuit.
Anesthesia Unit Carbon Dioxide Absorbents definition: Substances or materials capable of attracting or incorporating (i.e., absorbing) carbon dioxide. These materials are designed to be inserted in an anesthesia unit carbon dioxide absorber to remove carbon dioxide from the expired gases circulating in the patient breathing circuit before they are recirculated back through the anesthesia system to the patient. Commonly used absorbent materials include soda lime (e.g., Sodasorb) and barium hydroxide lime (e.g., Baralyme).
ABSORBER, CARBON-DIOXIDE definition: A carbon dioxide absorber is a device that is intended for medical purposes and that is used in a breathing circuit as a container for carbon dioxide absorbent. It may include a canister and water drain.
Anesthesia Unit Absorbers, Carbon Dioxide definition: Devices designed to absorb expired carbon dioxide circulating in the patient breathing circuit before the gas is recirculated back through the anesthesia system to the patient. Typically, these absorbers consist of canisters in line with the connection from the breathing bag to the patient or canisters with appropriate valves for inclusion in a circle system. The carbon dioxide is typically absorbed in soda lime (calcium hydroxide plus additives) or another mixture with similar properties.
Carbon Dioxide Measurement definition: A quantitative measurement of the gas carbon dioxide present in a sample.
Carbon Dioxide definition: A measurement of the carbon dioxide gas in a biological specimen.
tirapazamine definition: antineoplastic, radiation sensitizing agent; 3-amino1,2,4-benzotriazine 1,4-dioxide.
tirapazamine definition: A drug that makes tumor cells more sensitive to radiation therapy.
tirapazamine definition: A benzotriazine di-N-oxide with potential antineoplastic activity. Tirapazamine is selectively activated by multiple reductases to form free radicals in hypoxic cells, thereby inducing single-and double-strand breaks in DNA, base damage, and cell death. This agent also sensitizes hypoxic cells to ionizing radiation and inhibits the repair of radiation-induced DNA strand breaks via inhibition of topoisomerase II. Check for "http://www.cancer.gov/Search/ClinicalTrialsLink.aspx?id=42158&idtype=1" active clinical trials or "http://www.cancer.gov/Search/ClinicalTrialsLink.aspx?id=42158&idtype=1&closed=1" closed clinical trials using this agent. ("http://nciterms.nci.nih.gov:80/NCIBrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&code=C1464" NCI Thesaurus)
Tirapazamine definition: A benzotriazine di-N-oxide with potential antineoplastic activity. Tirapazamine is selectively activated by multiple reductases to form free radicals in hypoxic cells, thereby inducing single-and double-strand breaks in DNA, base damage, and cell death. This agent also sensitizes hypoxic cells to ionizing radiation and inhibits the repair of radiation-induced DNA strand breaks via inhibition of topoisomerase II. (NCI04)
ANALYZER, NITROGEN DIOXIDE definition: The nitrogen dioxide analyzer is a device intended to measure the concentration of nitrogen dioxide in respiratory gas mixtures during administration of nitric oxide.
carbon dioxide definition: [1] Kohlendioxid, Kohlenstoffdioxid
dioxide definition: Dioxyde.
CO₂ definition: dioxyde de carbone.
 
 
itItalian
biossido di zolfo definition: [1] Schwefeldioxid, SO2
anidride solforosa definition: [1] Schwefeldioxid, SO2
 
frFrench
dioxyde definition: Molécule comportant deux atomes d’oxygène (O2)