Volume 38, Issue 2
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ارسال های اخیر

Dodecylbenzenesulfonic acid as an efficient, chemoselective and reusable catalyst in the acetylation and Formylation of alcohols and phenols under solventfree conditions at room temperature
(Springer, 20140501)Dodecylbenzenesulfonic acid (DBSA) was used as an efficient, cheap and stable Brønsted catalyst for acetylation of alcohols and phenols and formylation of alcohols under solventfree conditions. Various primary, secondary ...

High performance liquid chromatography analysis, production and brief comparative study of citric acid producing microorganisms from spoiled onions in and around Vellore district
(Springer, 20140501)India is one of the largest producers of onion in the world producing over 13,920,000 metric tons. Storage is a major problem which leads to spoilage, and microbes play an important role in the spoilage. In this present ...

Effect of pH on the surface morphology and structural properties of TiO2 nanocrystals prepared by simple solgel method
(Springer, 20140501)Titanium dioxide nanocrystals were synthesized by solgel method at room temperature. Titanium isoprophoxide and absolute ethanol were used as precursors to prepare the sol. The pH of the solution was adjusted by adding ...

On Covers of Acts over Semigroups
(Springer, 20140501)Let S be a monoid and X a class of Sacts which is closed under coproducts. The object of this article is to find conditions under which all Sacts have Xprecovering. We have shown that the existence of torsionfree ...

Geochemical behavior of Mo and precious metals during supergene enrichment in the SarCheshmeh porphyry Cu deposit, Iran
(Springer, 20140501)Supergene oxidationleaching and secondary sulfide enrichment in the SarCheshmeh porphyry CuMo deposit generated a supergene profile to depths of 20 to 80 meters with oxide ore reserve about 22 Mt. @1.08% Cu and sulfides ...

Antibacterial, antifungal and antioxidant activity of four species from Arnebia genus growing wild in Iran
(Springer, 20140501)Antibacterial, antifungal and antioxidant activities of methanolic crude extracts from aerial parts of four Arnebia species namely Arnebia fimbriopetala, Arnebia linearifolia, Arnebia garandiflora, Arnebia tubata were ...

Bioavailability and speciation of potentially toxic elements in agricultural soils neighboring an industrial complex in northwest Isfahan, Iran
(Springer, 20140501)The mobility and bioavailability of trace elements in the agricultural soils are extremely important in assessing the risk of toxicity to the growing plants. A five step sequential extraction procedure (SEP) has been ...

Proposed optimization method for design of permanent magnet Guideways with high temperature superconductors
(Springer, 20140501)Superconducting materials are capable of trapping extremely high magnetic fields. This property and Meissner effect of superconductors causes a levitation force between bulk superconductors and a permanent magnet (PM). ...

Chain least squares method and illposed problems
(Springer, 20140501)The main purpose of this article is to increase the efficiency of the least squares method in numerical solution of illposed functional and physical equations. Determining the least squares of a given function in an ...

Multiplier in BLalgebras
(Springer, 20140501)In this paper, we introduce the notion of multiplier in algebra and study relationships between multipliers and some special mappings, likeness closure operators, homomorphisms and ( derivations in algebras. We introduce ...

Entire sequence spaces defined on locally convex Hausdorff topological space
(Springer, 20140501)In this paper we introduce entire sequence spaces defined by a sequence of modulus functions . We study some topological properties of these spaces and prove some inclusion relations.

On the range of a derivation
(Springer, 20140501)Let be a Banach algebra and a derivation. In this paper, it is proved, under certain conditions, that , where is the Jacobson radical of . Moreover, we prove that if is unital and is a continuous derivation, then , ...