Krishnaswamy S Rajan

US Patent:

6838292, Jan 4, 2005

Filed:

Apr 14, 2000

Appl. No.:

09/549353

Inventors:

Krishnaswamy S. Rajan - Elmhurst IL, US
Stephen S. Mainer - Crest Hill IL, US

Assignee:

Alion Science and Technology Corporation - McLean VA

International Classification:

G01N 3353
G01N 33543

US Classification:

436518, 436528, 435 4, 435 6, 435 71, 435 34, 435 36, 435 39, 435242, 4352871, 422 681, 422 8205, 422 8208, 340506, 340513, 340557

Abstract:

Methods and devices are provided for the detection of bacterial agents such agents as and with high sensitivity and selectivity. More specifically, methods and devices are based on a phosphorescence-emission detection system using chelate-stabilized lanthanides (e. g, Eu(III), Tb(III), and Sm(III)) to detect various spore-specific small organic molecules (e. g. , dipicolinic acid, diaminopimelic acid, n-acetlymuramic acid, and the like). By careful selection of the chelating agent or ligand coordinated to the lanthanide, both high specificity and selectivity can be obtained. Examples of suitable and preferred sensor systems include N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA) and N-(2-hydroxyethyl)iminodiacetic acid (HEIDA) combined with europium (III) and/or terbium (III). The chelate-stabilized lanthanides react with the spore-specific “target” molecules to form a characteristically phosphorescent product which can then be detected.

US Patent:

51475677, Sep 15, 1992

Filed:

Apr 9, 1971

Appl. No.:

7/700373

Inventors:

Vinod S. Agarwala - Warminster PA
Alfeo A. Conte - Warrington PA
Krishnaswamy S. Rajan - Elmhurst IL
Prabir K. Sen - Skokie IL

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C10M10580

US Classification:

252 427

Abstract:

This invention relates to a method and composition for improving the corron resistance and anti-wear properties of synthetic lubricating oil greases comprising the addition to said greases of effective amounts of a chelated Schiff base derived from the condensation of approximately stoichiometic amounts of at least one aldehyde and a polyamine.