Abstract:
The present invention relates to a method of forming defect-free ultrathin film composite membranes by the photochemical synthesis of an ultrathin polymer film on the surface of a microporous support membrane. In one particular embodiment, the method entails placing a support membrane on a filter paper which is saturated with a solution of the desired monomer(s). The solution then wicks to the top of the membrane, covering the surface with a thin solution film, where it is subjected to irradiation by ultraviolet (UV) light to initiate the polymerization of the ultrathin polymer film. The rate of polymerization can be enhanced by adding a photoinitiator to the gas phase above the membrane or into solution with the monomer or monomers to induce radical polymerization. The method results in a defect-free ultrathin composite membrane. In addition, to minimize photon penetration depth and confine the polymerization predominantly to the membrane surface, the incident at which the UV light strikes the membrane surface is kept at an acute angle. The ultrathin film composite membranes can be used in a vast number of chemical separation processes, bioreactors and sensors, energy conversion and drug delivery systems.
Abstract:
A process for making a cycloalkyl phosphine comprising hydrogenating an aryl phosphine in the presence of an effective amount of an aryloxide of a metal selected from the group consisting of niobium and tantalum is disclosed. Cycloalkyl phosphine products of this process, useful as ligands in a complex of a transition metal which acts as a catalyst in the formation of stereoisomers, are also set forth. Furthermore, niobium or tantalum organometallic compounds, generated in this process, useful in the catalytic hydrogenation of aryl phosphines and arene-containing polymers, is also described.
Abstract:
Food products for nutrition of infants which contain no more than subirritant amounts of free long-chain (C16-C22) fatty acids and triglycerides thereof are disclosed. Providing esters, such as ethyl esters, of such fatty acids in infant food products essentially eliminates the tendency of the fatty acid to damage the infant intestinal epithelium, but permits absorption and processing of the fatty acid moiety.
Abstract:
The present invention relates to a newly discovered Bacillus thuringiensis strains and toxins which exhibit nematocidal activity in agricultural and horticultural settings. These strains and toxins can be used as a biocontrol agent in the treatment and prevention of nematode infection in plants, and particularly in commercially important crop plants.
Abstract:
The invention relates to a chiral selector useful in separating underivatized enantiomers of non-steroidal anti-inflammatory agents, particularly naproxen and other arylacetic acid compounds, and relates to a process for achieving such separation utilizing the chiral selector, which is also useful in achieving the enantiomeric separation of amines, alcohol derivatives, epoxides and sulfoxides. The invention is also directed to an apparatus which comprises the chiral selectors.
Abstract:
The present invention relates to novel substantially pure amorphous metals and the sonochemical synthesis thereof comprising irradiating volatile organometallic compounds with high intensity ultrasound. The present invention is further directed to the use of amorphous metals as reactive catalysts for various processes such as the Fischer-Tropsch hydrogenation of carbon monoxide and for the hydrogenolysis and dehydrogenation of saturated hydrocarbons. The present invention further relates to the use of these amorphous metals as soft ferromagnetic materials.
Abstract:
Phenoxazines, unsubstituted or N-substituted as defined herein, can potentiate the antitumor effectiveness of chemotherapeutic agents, particularly in multiple drug resistant (MDR) cells.
Abstract:
C60 and C70 carbon atom compounds are prepared by evaporating graphite in an inert quenching gas. The vapor of carbon is collected and is selectively extracted with an organic non-polar solvent.
Abstract:
The present invention is directed to a gene encoding an envelope glycoprotein of equine herpesvirus type 1 (EHV-1), the glycoprotein D (gD) gene, its gene product and antibodies directed against gD polypeptides. The envelope glycoproteins of herpesvirus are major targets of the immune response to herpesviral infection. Hence, an important aspect of this invention is directed towards a vaccine against EHV-1 and treatment of EHV-1 infection by anti-EHV-gD antibodies or antisera.