transition metal

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transition metal

One of a series of chemical elements that have properties that exhibit a change from more metallic properties (metals) to less metallic properties (nonmetals) as one moves from left to right in the periodic table of elements. For example, many of the elements between calcium and arsenic display this phenomenon, e.g., titanium, chromium, and manganese.
See also: metal
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The catalytic effect of transition metals may be maximized in the former case.
Caption: MULTIJUNCTION SOLAR CELLS have the potential to provide an efficient and lower cost solar option than cells made only from rare earth and transition metals.
The interactions of hydrogen bonding and coordination of transition metal ions have dominated the field," says McMaster University chemistry professor Ignacio Vargas-Baca.
The properties were purchased through an asset purchase agreement between Transition Metals and the court-appointed receiver of First Nickel.
The target is a US enterprise engaged in the trade of transition metals and copper isotopes.
Results indicated that 24-hr transition metals and alkanes were associated with increased odds of hospital admissions for cardiovascular disease (CVD); transition metals were significantly associated with increased hospital admissions for ischemic heart disease, congestive heart failure, and atrial fibrillation; increased respiratory-related hospital admissions were significantly associated with exposure to alkanes; and aromatics and microcrystalline oxides were significantly associated with decreased CVD- and respiratory-related hospital admissions.
The metal free PEEK flow cell allows the determination of transition metals and organic components with no risk of contamination.
Toronto, Canada, Mar 4, 2011 - (ABN Newswire) - Transition Metals Corp (CVE:XTM) will be Exhibiting at the 2011 PDAC International Convention, Trade Show & Investors Exchange in Toronto.
Life could have originated multiples times, and, if we find life elsewhere in the universe, it could be very similar to the life we know here because it will be based on the same transition metals and ligands," Morowitz said.
Two somewhat related developments of the last few decades have moved toward resolving this difficulty: the organometallic chemistry of the transition metals (Or-gel, 1960; Winter, 1994) and organocatalysis (Barbas, 2008; MacMillan, 2008).
The study carried out at the University of Warwick and the University of Leeds and published in the Journal of Medicinal Chemistry, showed that a range of compounds containing the two transition metals Ruthenium and Osmium, which are found in the same part of the periodic table as precious metals like platinum and gold, cause significant cell death in ovarian and colon cancer cells.