Pure substances, such substances can either be elements, molecules, or compounds. The fundamental building blocks of matter are atoms. They comprise small particles that cannot be seen by the naked eyes. The main particles that constitute atoms are: The nucleus is a dense positively charged re...
Molecules can be made up of either one or more chemical elements. For example, an oxygen molecule comprises two atoms of the same element, thus a homonuclear molecule. On the other hand, the water molecule has three atoms where two atoms are from one element (hydrogen) and one from anothe...
oblique latticesrectangular latticesThe design, synthesis and characterisation of some compounds whose constituent molecules have a completely new shape have been carried out. A total of eight different series/part of series of these zigzag-shaped compounds that are either symmetrical or unsymmetrical ...
However, to date, attempts to experimentally observe either the strength of SOC or how it modifies the bulk band structure have been unsuccessful. By using bulk-sensitive nuclear magnetic resonance (NMR) spectroscopy combined with first-principles calculations, we reveal that 209Bi NMR isotropic ...
He atoms occupy a simple hexagonal lattice, while Mg and O occupy hcp lattices. The combination of He and either Mg or O forms a NiAs structure. The Mg and O atoms form an open structure that can accommodate linear chains of He atoms. Both Mg and O atoms have a coordination number of...
Thermosetting polymers containing reactive groups are used as coatings. These polymers are usually in the form of lattices that are further crosslinked either thermally or by addition of functional groups like isocyanates, amines or metal ions. By formation of a network these resins attain their desir...
(monocytes, lymphocytes, or neutrophils) are recruited, by selectively expressing specific adhesion molecules, such as vascular cell adhesion molecule-1 (VCAM-1), intracellular adhesion molecule-1 (ICAM-1), and E-selectin. In the earliest stage of the atherosclerotic lesion, there is a localized ...
The intercalation of organometallic guest molecules between the sheets of layered inorganic host lattices has attracted a considerable amount of research over the past 18 years. The process of intercalation has been found to dramatically alter the bulk properties of these materials, and there has been...
The amphiphilic molecules within each lamella may be oriented perpendicular to the plane of the lamella, or tilted. For comparable surfactants, lamellar phases are usually found at higher surfactant concentration than are hexagonal phases. Another, less common liquid crystalline phase is the cubic ...
Specifically, "fixed nitrogen" (i.e., NH 3 , NH 4 + , NO x , or N that is chemically bound to either inorganic or organic molecules and is releasable by hydrolysis to NH 3 or NH 4 + ) is the form of nitrogen useful to living organisms. To date no direct analysis of Martian ...