News tagged with chemical compounds
(Medical Xpress) -- Psychedelic substances have long been used for healing, ceremonial, or mind-altering subjective experiences due to compounds that, when ingested or inhaled, generate hallucinations, perceptual ...
Neuroscience Feb 29, 2012 | 4.9 / 5 (43) | 45 |
(Medical Xpress) -- After three decades of searching, the random screening of a group of compounds against the bacterium that causes tuberculosis has led scientists to a eureka discovery that breaks through the fortress that ...
Diseases, Conditions, Syndromes Feb 21, 2012 | 5 / 5 (11) | 1 |
Hydrocarbons, a chemical compound commonly found in household items from cleaning products to gasoline, are among the top 10 causes of pediatric poisoning deaths in the United States. A new study by researchers ...
Pediatrics May 06, 2013 | 4 / 5 (1) | 0
Pain? Just turn it off! It may sound like science fiction, but researchers based in Munich, Berkeley and Bordeaux have now succeeded in inhibiting pain-sensitive neurons on demand, in the laboratory. The crucial element in ...
Medical research Feb 22, 2012 | 5 / 5 (6) | 0 |
(Medical Xpress)—One of the world's top selling drugs potentially also acts against the growth of new lymphatic vessels, with potential implications for cancer therapy. This surprising finding was brought ...
Cancer Sep 04, 2012 | 5 / 5 (2) | 0 |
The process researchers use to generate induced pluripotent stem cells (iPSCs)—a special type of stem cell that can be made in the lab from any type of adult cell—is time consuming and inefficient. To ...
Medical research Sep 25, 2012 | 5 / 5 (3) | 2 |
Scientists at Emory University School of Medicine have identified a new group of compounds that may protect brain cells from inflammation linked to seizures and neurodegenerative diseases.
Neuroscience Feb 14, 2012 | 4.5 / 5 (4) | 0 |
(Medical Xpress)—For a bunch of inanimate chemical compounds, the nucleic and amino acids caught up in the infamous "selfish" segregation distorter (SD) saga have put on quite a soap opera for biologists ...
Genetics Mar 05, 2013 | 5 / 5 (1) | 0 |
Scientists at USC have discovered a new type of drug for the treatment of ovarian cancer that works in a way that should not only decrease the number of doses that patients need to take, but also may make it effective for ...
Cancer Oct 03, 2012 | not rated yet | 0 |
A brain pathway that is stimulated by traumatic or fearful experiences can be disrupted by two compounds that show promise for preventing post-traumatic stress disorder, Indiana University researchers reported.
Psychology & Psychiatry Oct 15, 2012 | 5 / 5 (1) | 0 |
A research team pursuing one of the most commonly altered genes in cancer has laid a critical foundation for understanding this gene that could point the way toward developing drugs against it. A recent study of cancer genetics ...
Cancer Apr 16, 2012 | 5 / 5 (2) | 0 |
(Medical Xpress)—The sense of smell remains a mystery in many respects. Fragrance companies, for instance, know it is crucial that chemical compounds in perfumes reach nostrils at different rates to create ...
Neuroscience Apr 10, 2013 | not rated yet | 1 |
(Medical Xpress)—Researchers have identified a new means to eradicate malaria infections by rapidly killing the blood-borne Plasmodium parasites that cause the disease.
Medical research Oct 25, 2012 | 4.5 / 5 (4) | 0 |
A new chemical process developed by a team of Harvard researchers greatly increases the utility of Positron Emission Tomography (PET) in creating real-time 3-D images of chemical process occurring inside the human body.
Cancer Nov 04, 2011 | not rated yet | 0 |
Collaborating researchers at Stanford University and The Scripps Research Institute have identified chemical compounds that show promise as potential therapeutics for a set of medical conditions caused by the abnormal clumping ...
Medical research Aug 29, 2011 | 5 / 5 (2) | 0 |
A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions and that have a unique and defined chemical structure. Chemical compounds consist of a fixed ratio of atoms that are held together in a defined spatial arrangement by chemical bonds. Chemical compounds can be compound molecules held together by covalent bonds, salts held together by ionic bonds, metallic compounds held together by metallic bonds, or complexes held together by coordinate covalent bonds. Substances such as pure chemical elements and elemental molecules consisting of multiple atoms of a single element (such as H2, S8, etc.) are not considered chemical compounds.
Elements form compounds to become more stable. They become stable when they have the maximum number of possible electrons in their outermost energy level, which is normally two or eight valence electrons. This is the reason that noble gases do not frequently react: they already possess eight valence electrons (the exception being helium, which requires only two valence electrons to achieve stability).
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