In this study, different derivative spectrophotometric methods are proposed for the simultaneous determination of chlorpheniramine maleate (CP), phenylephrine HCl (PE) and phenylpropanolamine HCl (PP) in their ternary mixtures and in pharmaceutical dosage forms. Spectra of single component and ternary mixtures of various concentrations and combinations from zero- to fourth-derivation were obtai...

In this study, different derivative spectrophotometric methods are proposed for the simultaneous determination of chlorpheniramine maleate (CP), phenylephrine HCl (PE) and phenylpropanolamine HCl (PP) in their ternary mixtures and in pharmaceutical dosage forms. Spectra of single component and ternary mixtures of various concentrations and combinations from zero- to fourth-derivation were obtai...

OBJECTIVES To assess the validity of the Oxford Knee Score (OKS) for use in patients undergoing non-operative management for their knee osteoarthritis (OA) within the National Health Service (NHS). DESIGN Observational cohort study. SETTING Single orthopaedic centre in England. PARTICIPANTS 134 patients undergoing non-operative management for knee OA. MAIN OUTCOME MEASURES OKS, the Inte...

The Polyakov bosonic string is quantised in Euclidean Anti-de Sitter space-time using functional methods. Regularisation of the functional determinants using both heat-kernel and zeta function techniques shows that the AdSD+1 string reduces to the Liouville field theory, as in the flat space-time case. A Feynman graph expansion is used to evaluate (approximately) the coefficient multiplying the...

Lagrange interpolation estimates a function at a reference position χ from known values of the function at distinct non-uniformly spaced points x1, . . . , xn. Here, the corresponding n-point finite-difference formulas are derived to estimate derivatives up to order n − 1 at χ. A recurrence relation permits the errors to be determined to any accuracy as a Taylor series. The error coefficient mu...