Combustion of preheated raw animal fats-diesel fuel blends at diesel engine

Journal of Thermal Analysis and Calorimetry - Because of pollution problems, after the Mayors Summit 2016 takes place, certain European capital cities want to be free from diesel engines automotive...     

Commutative rings with two-absorbing factorization

We use the concept of 2-absorbing ideal introduced by Badawi to study those commutative rings in which every proper ideal is a product of 2-absorbing ideals (we call them TAF-rings). Any TAF-ring has dimension at most one and the local TAF-domains are the atomic pseudo-valuation domains.     

Systèmes triples de variétés non holonomes linéaires de l'espace projectif ordinaire

Résumé En employant la méthode du repère mobile, l' A. étudie les systèmes triples de variétés non holonomes en établissant un système complet d'invariants tant finis qu'infinitésimaux dont il donne les significations géométriques. Après avoir considéré des figures et des correspondances locales, l'A. présente des classes de systèmes triples et donne un critère concernant la correspondance d'applicabilité projective entre deux systèmes triples en utilisant les invariants infinitésimaux du typeBompiani. à M. Enrico Bompiani pour son Jubilè scientifique.     

Hyers–Ulam–Rassias Stability of a Jensen Type Functional Equation

In this paper we solve the Jensen type functional equation (1.1). Likewise, we investigate the Hyers–Ulam–Rassias stability of this equation.     

Chemical Profile,Cytotoxic Activity and Oxidative Stress Reduction of Different Syringa vulgaris L. Extracts

Syringa vulgaris L. (common lilac) is one of the most popular ornamental species, but also a promising not comprehensively studied source of bioactive compounds with important therapeutic potential. Our study was designed to characterize the chemical composition and to assess the antioxidant and cytotoxic properties of ethanolic extracts obtained from S. vulgaris L. flowers, leaves, bark, and fruit. The chemical profile of the ethanolic extracts was investigated using chromatographic (HPLC-DAD-ESI⁺, GC-MS) and spectral (UV-Vis, FT-IR) methods, while the protective effect against free radicals was evaluated in vitro by different chemical assays (DPPH, FRAP, CUPRAC). The cytotoxic activity was tested on two tumoral cell lines, HeLa, B16F10, using the MTT assay. Significant amounts of free or glycosylated chemical components belonging to various therapeutically important structural classes, such as phenyl-propanoids (syringin, acteoside, echinacoside), flavonoids (quercetin, kaempferol derivatives) and secoiridoids (secologanoside, oleuropein, 10-hydroxy oleuropein, demethyloleuropein, syringalactone A, nuzhenide, lingstroside) were obtained for the flowers, leaves and bark extracts, respectively. Furthermore, MTT tests pointed out a significant cytotoxic potential expressed in a non-dose-dependent manner toward the tumoral lines. The performed methods underlined that S. vulgaris extracts, in particular belonging to flowers and leaves, represent valuable sources of compounds with antioxidant and antitumoral potential.     

On a Counterexample Concerning Unique Continuation for Elliptic Equations in Divergence Form

We construct a second order elliptic equation in divergence form in3, with a nonzero solution which vanishes in a half-space.The coefficients are -Hölder continuous of any order < 1. This improves a previous counterexample of Miller (1972, 1974).Moreover, we obtain coefficients which belong to a finer class ofsmoothness, expressed in terms of the modulus of continuity.     

Almost Schreier monoids

In an earlier paper, we introduced and studied the class of commutative integral domains D having the following property: if a, b₁, b₂ ? D{a, b_1, b_2 \in D} and a|b ₁ b ₂, there exist an integer k ≥ 1 and a₁, a₂ ? D{a_1, a_2 \in D} such that a ^k = a ₁ a ₂ and a_i|b_i^k , i = 1, 2{a_i|b{_i}^k , i = 1, 2} . In this paper, we show that many of our earlier results are purely multiplicative in the sense they can be extended to the setting of commutative cancellative monoids.