Hossein Abbaspour

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Let G be a Poincaré duality group of dimension n. For a given element g ∈ G, let Cg denote its centralizer subgroup. Let LG be the graded abelian group defined by (LG)p = ⊕[g]Hp+n(Cg) where the sum is taken over conjugacy classes of elements in G. In this paper we construct a multiplication on LG directly in terms of intersection products on the(More)
This paper reports a novel green approach for the synthesis of silver nanoparticles (AgNPs) using aqueous seed extract of Dracocephalum moldavica (L.) under ambient conditions. Processes such as Ultraviolet-visible (UV-vis) spectrometer, field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy(More)
In this paper we construct a Lie algebra representation of the algebraic string bracket on negative cyclic cohomology of an associative algebra with appropriate duality. This is a generalized algebraic version of the main theorem of [AZ] which extends Goldman’s results using string topology operations.The main result can be applied to the de Rham complex of(More)
Salinity, a severe environmental factor, has limited the growth and productivity of crops. Many compounds have been applied to minimize the harmful effects of salt stress on plant growth. An experiment was conducted to investigate the interactive effects of exogenous ascorbic acid (AsA) and gibberellic acid (GA3) on common bean (Phaseolus vulgaris L. cv.(More)
Let M be a closed, oriented and smooth manifold of dimension d. Let LM be the space of smooth loops inM . In [5] Chas and Sullivan introduced loop product, a product of degree −d on the homology of LM . In this paper we show how for three manifolds the “nontriviality” of the loop product relates to the “hyperbolicity” of the underlying manifold. This is an(More)
Let G → P → M be a flat principal bundle over a closed and oriented manifold M of dimension m = 2d. We construct a map of Lie algebras Ψ : H 2∗(LM) → C (MC), where H 2∗(LM) is the even dimensional part of the equivariant homology of LM , the free loop space of M , and MC is the Maurer-Cartan moduli space of the graded differential Lie algebra Ω(M, Pg), the(More)
Composite sago starch-based system was developed and characterized with the aim to find an alternative to gelatin in the processing of pharmaceutical capsules. Dually modified (Hydrolyzed-Hydroxypropylated) sago starches were combined with κ-carrageenan (0.25, 0.5, 0.75, and 1%). The rheological properties of the proposed composite system were measured and(More)
Pistachio has a crucial economic value, but show loss of quality due to unfavorable conditions during storage. Active packaging is a relatively novel concept of packaging that changes the conditions of the packaged food to extend its shelf-life and improve its safety. Because Aloe vera gel has been recently explored as edible coating, the objective of the(More)
We first review various known algebraic structures on the Hochschild (co)homology of a differential graded algebras under weak Poincaré duality hypothesis, such as CalabiYau algebras, derived Poincaré duality algebras and closed Frobenius algebras. This includes a BV-algebra structure on HH(A,A) or HH(A,A), which in the latter case is an extension of the(More)