Controllability and Observability of Kronecker Product Sylvester System on Time Scales

The main objective in this paper is to present the necessary and sufficient conditions for complete controllability, complete observability associated with kronecker product Sylvester system on time scales.2000 Mathematics Subject Classification: 93B05,93B07,49K15

Chemical Additives for Corrosion Control in Desalination Plants

The addition of chemical additives has been considered as a standard operation in water treatment systems. This chapter discusses the chemical additives used for the control of corrosion in desalination systems. Specifically, corrosion inhibitors for various metallurgies, biocides, and oxygen scavengers are covered. The pros and cons of the additive chemicals have been highlighted. The need to utilize green corrosion inhibitors based on plants and ionic liquids materials have been emphasized. This class of materials are environmentally friendly, cheap, and readily available

Research Letter - Pharmacological investigation of prunin-6"-O-p-coumarate: A flavonoid glycoside

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Minor pregnanes from Caralluma adscendens var. gracilis and Caralluma pauciflora

Phytochemical investigation of Caralluma adscendens var. gracilis and Caralluma pauciflora (Asclepiadaceae) whole plant extracts allowed to isolate one pregnane glycoside and two pregnanes characterized as 12 beta,20-O-dibenzoy1-5a,6-dihydrosarcostin beta-oleandropyranosyl( 1 -> 4)-beta-cymaropyranosyl-(1 -> 4)-beta-digitoxypyranosyl-(1 -> 4)-beta-cymaropyranosyl(1.4)-beta-cymaropyranoside (1), 12 beta-0-benzoyl-3 beta,11 alpha,14 beta,20R-pentahydroxy-pregn-5-ene (2), and 11 alpha-O-benzoyl-3 beta,12 beta,14 beta,20R-pentahydroxy-pregn-5-ene (3), respectively. Their structural characterization was obtained on the basis of extensive NMR spectral studies. Three known pregnane glycosides along with lupeol and beta-sitosterol were also isolated and characterized