show by femtosecond mid-infrared spectroscopy that the water molecules enter the apolar matrix in the form of particularly hydrogen-bonded complexes with acetone. The OH stretching vibrations of the water molecule have been excited by an infrared laser pulse. Because the OH vibrations of the water ...
In order to obtain a homeotropic orientation, the substrate is often treatedwith a bi- or trifunctional silane compound. There are compounds which per molecule have two or three active atoms or groups which can react with the substrate and thus produce a bonding. Examples of such compounds are...
as organic matter is transported through soils via water and water films and the interactions at mineral surfaces exhibit a temporal and spatial dependence. Parameters such as local environmental conditions, organic matter chemistry, soil structure/porosity, and mineral reactivity are key parameters that...
The cover picture shows the supramolecular tetramer that exists as a repeating motif in crystals of the crown ether quinoxaline derivative whose synthesis is shown on the left-hand side of the figure. As illustrated on the right-hand side of the graphic, a water molecule, held in place by hy...
Although the bonded terms are not directly involved in the calculation of inter-molecular interactions, they do have impacts on the intra-molecular conformational preference of each molecule involved in host–guest interactions. Therefore, they indirectly influence the host–guest interactions and should ...
Hydrolase is a term often used inbiochemistry. It refers to a specific class of enzyme that works to control the process ofhydrolysisin the body. Hydrolysis is basically a chemical reaction that is caused when a molecule of water works to split apart another molecule in the body. There are ...
鱼类动物水下航海图片_(fish-animal-underwater-water-nautical-picture-image_) 资源编号 :93741981 格式:png 文件体积 :273k 分辨率 :1200 x 1200 幸福是奋斗出来 爱给网提供海量的背景资源素材免费下载, 本次作品为png 格式的鱼类动物水下航海图片_(fish-animal-underwater-water-nautical-picture-image_), 本...
Scientists discovered that glacier movement in Greenland is more complicated than it sounds, with deformation in warmer ice comprising small amounts of water accounting for motion earlier thought to be caused by sliding where the ice meets the bedrock beneath. Image Credit: Robert Law. The internat...
PURPOSE:To obtain a material excellent in heat resistance which can form colored picture images by combining a copolymer of (meth)acrylic acid and vinyl monomers, photopolymerizable monomers, photopolymn. initiator, epoxy compd. having epoxy group in the molecule, epoxy hardening agent and pigment....
(18F), with radioactive half-lives of 20 and 110 min, respectively. Due to these short half-lives, PET radioligands are generated in a cyclotron and are rapidly incorporated into the molecule of interest immediately prior to their use (8). In SPECT, the commonly used isotope is technetium...