1-Acryloyl-2,6-bis­(4-chloro­phen­yl)-3,5-dimethyl­piperidin-4-one

In the crystal structure of the title compound, C22H21Cl2NO2, the piperidinone ring is in a boat conformation

Evidence from UV Spectra for d-Orbital Utilization by Sulphur

388-39

Synthesis of β-amino-sulphones and αβ-unsaturated sulphones

This article does not have an abstract

Preparation of α, β-unsaturated sulfones

This article does not have an abstract

The dipole moments of some aryl methyl sulphides: evidence for the expansion of the valence shell of sulphur

The electric dipole moments of a number of aryl methyl sulphides have been measured in benzene solution at 30° and the data discussed. The moments of p-aminophenyl methyl and p-dimethylaminophenyl methyl sulphide indicate that sulphur enters into d-orbital resonance in these compounds

Isomerization of 4-biphenylyl arenesulfonates

This article does not have an abstract

Modeling and simulation of a wirelessly-powered thermopneumatic micropump for drug delivery applications

This paper presents modeling and finite element analysis of a thermopneumatic micropump with a novel design that does not affect the temperature of the working fluid. The micropump is operated by activating a passive wireless heater using wireless power transfer when the magnetic field is tuned to match the resonant frequency of the heater. The heater is responsible for heating an air-heating chamber that is connected to a loading reservoir through a microdiffuser element. The solution inside the reservoir is pumped through a microchannel that ends with an outlet hole. The thermal and pumping performances of the micropump are analyzed using finite element method over a low range of Reynold’s number < 10 that is suitable for various biomedical applications. The results demonstrate promising performance with a maximum flow rate of ~2.86 µL/min at a chamber temperature of 42.5 °C, and a maximum pumping pressure of 406.5 Pa. The results show that the developed device can be potentially implemented in various biomedical areas, such as implantable drug delivery applications

Kinetics of quaternization and conformational analysis of some substituted NN-dimethylcyclohexylamines

The rates of quaternization of a number of substituted NN-dimethylcyclohexylamines with methyl iodide in methanol have been measured at 30 and 40&#176;C, and the conformations of these compounds are analysed from the kinetic data. The conformational free-energy difference for the dimethylamino-group is found to be -2·3 kcal mol-1 at 30&#176;C and that for the phenyl group -3·0 kcal mol-1. The kinetic data indicate that trans-3,3,5-trimethyl- and 3,3,5,5-tetramethyl-NN-dimethylcyclohexylamine exist in the non-chair conformation