A novel recognition method for selective determination of the hyoscine N-Butyl bromide (HBB), an antispasmodic agent for smooth muscles, was devised using extended gate field-effect transistor (EG-FET) as transducing unit. For this purpose a PVC membrane, containing hyoscine n-butyl-tetraphenyl borate ion-pair as recognition component, was coated on Ag/AgCl wire, which was connected to the exte...

Based on the recurrence relations on the coefficients of the Boros-Moll polynomials Pm(a) = ∑ i di(m)a i derived independently by Kauers and Paule, and Moll, we are led to the discovery of the reverse ultra log-concavity of the sequence {di(m)}. We also show that the sequence {i!di(m)} is log-concave for m ≥ 1. Two conjectures are proposed.

Judith Burkart ([email protected]), Anthropological Institute, University of Zurich, Switzerland Adolf Heschl ([email protected]), Zoological Institute, University of Graz, Austria Luca Surian & Stefania Caldi ([email protected]), Dipartimento di Psycologia, Università di Trieste, Trieste, Italy Claudia Thoermer ([email protected]) & Beate Sodian (so...

A thin coating of desert varnish occurs on Forrest 009 and Nurina 004, both equilibrated ordinary chondrite (L6) finds from the Nullarbor Plain, Australia. This finely laminated deposit is chemically and petrographically comparable to the varnish found on terrestrial rocks. Forrest 009, which has a terrestrial age of 5.9 kyr, has a 100-130 μm thick coating of desert varnish that has a laterally...

BACKGROUND Mn oxides occur in a wide variety of geological settings and exert considerable influences on the components and chemical behaviors of sediments and soils. Microbial reduction of Mn oxides is an important process found in many different environments including marine and freshwater sediments, lakes, anoxic basins, as well as oxic-anoxic transition zone of ocean. Although the pathway o...

background: gemcitabine (2′, 2′-difluoro-2′- deoxycytidine, an analogue of deoxycytidine) is a relatively new drug with wide range of anti-cancer activity. in this study, radiosensitizing effects of gemcitabine was investigated on hela and mrc5 human originated cell lines under both chronically hypoxic and normoxic conditions using the micronucleus (mn) assay. materials and methods: for inducti...

Let G be a simple connected graph of order n with average 2degree sequence M1 ≥ M2 ≥ · · · ≥ Mn. Let ρ(G) denote the spectral radius of the adjacency matrix of G. We show that for each 1 ≤ l ≤ n and for any b ≥ max {di/dj | i ∼ j}, ρ(G) ≤ Ml − b+ √ (Ml + b)2 + 4b ∑l−1 i=1(Mi −Ml) 2 with equality if and only if M1 = M2 = · · · = Mn.

PURPOSE The aims of this study were to investigate the effects of manganese (Mn) dust exposure on lung functions and evaluate the potential synergistic effect between smoking and Mn dust exposure among refinery workers. METHODS A retrospective study including 1658 workers in a ferromanganese refinery was conducted, with subjects who were from the Guangxi manganese-exposed workers healthy coho...

A library of 10 Mn-containing complexes capable of switching reversibly between the Mn(II) and Mn(III) oxidation states was prepared and evaluated for potential usage as MRI reporters of tissue redox activity. We synthesized N-(2-hydroxybenzyl)-N,N',N'-ethylenediaminetriacetic acid (HBET) and N-(2-hydroxybenzyl-N,N',N'-trans-1,2-cyclohexylenediaminetriacetic acid (CyHBET) ligands functionalized...

Multi-element determination of trace elements in urine and dialysis solutions by atomic absorption spectrometry has been investigated. Coprecipitation with samarium hydroxide was used for preconcentration of trace elements and elimination of matrix elements. To 10 ml of each sample was added 500 mul of 2 mgml(-1) samarium solutions; the pH was then adjusted to 12.2 in order to collect trace hea...