Production of Polyglutamate (PGA) biopolymer by immobilized Bacillus licheniformis strain-R was intensively investigated. Preliminary experiments were carried out to address the most suitable immobilization methodology. Entrapment of Bacillus cells in alginate-agar led optimal PGA production (36.75 g/l), with 1.32-and 2.18-fold increase in comparison with alginate-or K-carrageenan-immobilized c...

The paper studies the solution stability of a parametric control problem governed by semilinear elliptic equations with mixed state-control constraint, where objective function is nonconvex and admissible set unbounded. We show that under certain conditions, upper semicontinuous continuous respect to parameters.

In this paper we prove that every proper convex and lower semicontinuous functional de ned on a real re exive Banach space X is semicoercive if and only if every small uniform perturbation of attains its minimum value on X.

We show that convex lower semicontinuous functionals deened on functions of bounded variation are characterized by their minima, and we prove a derivation formula which allows an integral representation of such functionals. Applications to relaxation and homogenization are given.

We prove a fixed-point result for compact upper semicontinuous compact-convex-valued multifunctions satisfying antipodal boundary conditions on bounded symmetric subsets of a normed space. Two types or antipodal conditions are considered.

Since bacterial nitroreduction may play a critical role in the activation of nitropolycyclic aromatic hydrocarbons, we have used batch and semicontinuous culture systems to determine the ability of intestinal microflora to metabolize the carcinogen 6-nitrochrysene (6-NC). 6-NC was metabolized by the intestinal microflora present in the semicontinuous culture system to 6-aminochrysene (6-AC), N-...

Semicontinuous ambient aerosol composition measurements performed during the PMTACS-NY Summer 2001 field campaign in Queens/New York with an aerosol mass spectrometer (AMS, developed by Aerodyne Research Inc.) are described. The measurements include 10 min averages of the nonrefractory sulfate, nitrate, ammonium, chloride, and organic mass concentrations in the particle size range of 50 to appr...

In this paper we establish criteria for the stability of the proximal mapping Prox φ = (∂φ+∂f)−1 associated to the proper lower semicontinuous convex functions φ and f on a reflexive Banach space X.We prove that, under certain conditions, if the convex functions φn converge in the sense of Mosco to φ and if ξn converges to ξ, then Prox f φn(ξn) converges to Prox f φ(ξ). 1. Preliminaries Let X b...

The definition of the weak slope of continuous functions introduced by Degiovanni and Marzocchi (cf. [8]) and its interrelation with the notion “steepness” of locally Lipschitz functions are discussed. A deformation lemma and a mountain pass theorem for usco mappings are proved. The relation between these results and the respective ones for lower semicontinuous functions (cf. [7]) is considered...