A method of acidizing a formation penetrated by a wellbore that includes the steps of injecting into the wellbore at a pressure below formation fracturing pressure a treatment fluid that includes a gelling fluid including a gelling agent and a hydrophobically-modified associative polymer, and an aqueous acid; and allowing the treatment fluid to acidize the formation.

A method of acidizing a formation penetrated by a wellbore that includes the steps of injecting into the wellbore at a pressure below formation fracturing pressure a treatment fluid that includes a gelling fluid including a gelling agent and a hydrophobically-modified associative polymer, and an aqueous acid; and allowing the treatment fluid to acidize the formation.

Compositions and methods useful in administering nucleic acid based therapies, for example association complexes such as liposomes and lipoplexes are described.

Compositions and methods useful in administering nucleic acid based therapies, for example association complexes such as liposomes and lipoplexes are described.

Disclosed herein are secondary amine compounds that inhibit tRNA synthetase. The compounds of the invention are useful in inhibiting tRNA synthetase in Gram-negative bacteria and are useful in killing Gram-negative bacteria. The secondary amine compounds of the invention are also useful in the treatment of tuberculosis.

This invention relates to an anionic-cationic-nonionic surfactant as substantially represented by the formula (I), production and use thereof in tertiary oil recovery. The anionic-cationic-nonionic surfactant of this invention exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present anionic-cationic-nonionic surfactant, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced.

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In the formula (I), each group is as defined in the specification.

Ethyl benzyl quaternaries having superior anti-fungal properties versus their benzyl quaternary analogs. The ethylbenzyl amidoamine quaternaries of the present invention are easily produced without significant waste and with minimal capital, while possessing improved antimicrobial properties.

Ethyl benzyl quaternaries having superior anti-fungal properties versus their benzyl quaternary analogs. The ethylbenzyl amidoamine quaternaries of the present invention are easily produced without significant waste and with minimal capital, while possessing improved antimicrobial properties.

Methods for processing polynucleotide-containing biological samples, and materials for capturing polynucleotide molecules such as RNA and/or DNA from such samples. The RNA and/or DNA is captured by polyamindoamine (PAMAM (Generation 0)) bound to a surface, such as the surface of magnetic particles. The methods and materials have high efficiency of binding RNA and of DNA, and of release, and thereby permit quantitative determinations.

Methods for processing polynucleotide-containing biological samples, and materials for capturing polynucleotide molecules such as RNA and/or DNA from such samples. The RNA and/or DNA is captured by polyamindoamine (PAMAM (Generation 0)) bound to a surface, such as the surface of magnetic particles. The methods and materials have high efficiency of binding RNA and of DNA, and of release, and thereby permit quantitative determinations.