chemical contraction

См. также в других словарях:

• chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

• Chemical tank — BASF Chemical Plant Portsmouth Site in the West Norfolk area of Portsmouth, Virginia. The plant is served by the Commonwealth Railway. Chemical tanks are storage containers for chemicals. They come in a variety of sizes and shapes, and are used… …   Wikipedia

• Contraction des lanthanides — La contraction des lanthanides ou contraction lanthanidique désigne, en chimie, le fait que le rayon ionique des lanthanides décroît significativement lorsque le numéro atomique augmente, pour les atomes non chargés ou des ions possédant la même… …   Wikipédia en Français

• Lanthanide contraction — is a term used in chemistry to describe different but closely related concepts associated with smaller than expected ionic radii of the elements in the lanthanide series (atomic number 58, Cerium to 71, Lutetium).CauseVery simply, the effect… …   Wikipedia

• Muscle contraction — See also: Twitch and Tremor Top down view of skeletal muscle Muscle fiber generates tension through the action of actin and myosin cross bridge cycling. While under tension, the muscle may lengthen, shorten, or …   Wikipedia

• lanthanide contraction — ▪ chemistry also called  lanthanoid contraction        in chemistry, the steady decrease in the size of the atoms and ions of the rare earth elements (rare earth element) with increasing atomic number from lanthanum (atomic number 57) through… …   Universalium

• Premature ventricular contraction — Classification and external resources A premature ventricular contraction marked by the arrow. ICD 10 I …   Wikipedia

• d-block contraction — Atomic radius of elements of the groups 2,13 and 14. It shows d block contraction , especially for Ga and Ge d block contraction (sometimes called scandide contraction) is a term used in chemistry to describe the effect of having full d orbitals… …   Wikipedia

• List of chemical warfare agents — A chemical weapon agent (CWA) is a chemical substance whose toxic properties are used to kill, injure or incapacitate. About 70 different chemicals have been used or stockpiled as chemical weapon agents during the 20th century. These agents may… …   Wikipedia

• List of chemical element name etymologies — This is the list of etymologies for all chemical element names: Name Symbol Language of origin Word of origin Meaning Symbol origin Description Actinium Ac Greek ἀκτίς (aktis) beam Greek aktinos ἀκτίς, ἀκτῖνος (aktis; aktinos), meaning beam (ray) …   Wikipedia

• excitation-contraction coupling — the coupling of the action potential to muscle constriction by means of calcium ions which diffuse rapidly into the myofibrils and catalyze the chemical reactions that promote the contractile sliding of actin and myosin filaments …   Medical dictionary