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Chemical Phenomena (8)
Articles on Chemical Phenomena
MCR 2009. Abstracts of the 4th International Conference on Multi-Component Reactions and Related Chemistry, Ekaterinburg, Russia.
Potential of amorphous microporous silica for ibuprofen controlled release
Amorphous microporous silica (AMS) xerogel materials were synthesized in an acid-catalyzed sol-gel process. The porosity of AMS was adapted by varying sol-gel synthesis parameters including the molar hydrolysis ratio (r-value), HCl:Si molar ratio, the type of silicon alkoxide source...
Asymmetric cooperative catalysis of strong Brønsted acid-promoted reactions using chiral ureas.
We describe a strategy for inducing enantioselectivity in reactions of protio-iminium ions, wherein a chiral catalyst interacts with the highly reactive intermediate through a network of noncovalent interactions. This interaction leads to an attenuation of the reactivity of the iminium ion and allow...
Multiple functional groups of varying ratios in metal-organic frameworks.
We show that metal-organic frameworks (MOFs) can incorporate a large number of different functionalities on linking groups in a way that mixes the linker, rather than forming separate domains. We made complex MOFs from 1,4-benzenedicarboxylate (denoted by "A" in this work) and its derivatives -NH2,...
Conformationally constrained analogues of diacylglycerol. 29. Cells sort diacylglycerol-lactone chemical zip codes to produce diverse and se...
We have termed "chemical zip codes", are able to transform a relatively small chemical space into a larger universe of biological activities, as membrane-containing organelles within the cell appear to be able to decode these "chemical zip codes". It is postulated that after binding to protein kinas...
Green chemistry for chemical synthesis.
Green chemistry for chemical synthesis addresses our future challenges in working with chemical processes and products by inventing novel reactions that can maximize the desired products and minimize by-products, designing new synthetic schemes and apparati that can simplify operations in chemical p...
Molecular-structure-based models of chemical inventories using neural networks.
We assessed the capabilities of linear regression and neural network models for this purpose. All models were generated with a data set of inventory data on 103 chemicals. Different input sets were chosen as ways to transform the chemical structure into a numerical vector of descriptors and the effe...
Surface immobilization of biomolecules by click sulfonamide reaction.
Alkyne-modified biomolecules can be immobilized site- and chemoselectively on sulfonylazide slides under very mild conditions by means of the click sulfonamide reaction.
Additivity versus synergy: a theoretical analysis of implications for anesthetic mechanisms.
We explore the converse: does additivity imply a single site of action? The interaction of one versus two ligands competing for the same binding site at a receptor was explored using the law of mass action. Circuits were then constructed to investigate how the potency of drugs and th...
Cold controlled chemistry.
Collisions of molecules in a thermal gas are difficult to control. Thermal motion randomizes molecular encounters and diminishes the effects of external radiation or static electromagnetic fields on intermolecular interactions. The effects of the thermal motion can be reduced by cooling molecular ga...