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758 Newest Publications about the topic iso

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Burst Strength of Tubing and Casing Based on Twin Shear Unified Strength Theory

14-11-2014 | Yuanhua Lin et al., PLoS ONE, 2014

by Yuanhua Lin, Kuanhai Deng, Yongxing Sun, Dezhi Zeng, Wanying Liu, Xiangwei Kong, Ambrish Singh The internal pressure strength of tubing and casing often cannot satisfy the design requirements in high pressure, high temperature and high H2S gas wells. Also, the practical safety coefficient of ...

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ChemInform Abstract: Bi—Zn Bond Formation in Liquid Ammonia Solution: [Bi—Zn—Bi]4‐, a Linear Polyanion that is Iso(valence)‐electronic to CO2.

13-11-2014 | Christian B. Benda, Tobias Koechner, Raphaela Schaeper, Stephan Schulz, Thomas F. Faessler, ChemInform, 2014

Abstract (III) crystallizes as black block‐shaped crystals in the monoclinic space group C2/c with Z = 4 (single crystal XRD) and contains isolated, linear heteroatomic [Bi—Zn—Bi]4‐ anions.

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Combustion properties of Brazilian natural wood species

13-11-2014 | Monique Amaro Rocha, Alexandre Landesmann, Fire and Materials, 2014

SUMMARY This paper investigates the combustion characteristics of 12 wood species natural to Brazil. A mass loss cone calorimeter was used to obtain the properties associated with (i) heat release rate (HRR), peak HRR, and total heat released; (ii) total mass loss and mass loss rate; (iii) ...

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Isotope ratio analysis of carbon and nitrogen by elemental analyser continuous flow isotope ratio mass spectrometry (EA-CF-IRMS) without the use of a reference gas

12-11-2014 | L. J. Bay; S. H. Chan; T. Walczyk, Journal of Analytical Atomic Spectrometry, 2014

A new approach to normalize measured isotope ratios (carbon and nitrogen) by elemental analyser continuous flow isotope ratio mass spectrometry (EA-CF-IRMS) was evaluated. Isotope ratios of samples are altered during the IRMS measurement and must be corrected for both instrumental drifts as well ...

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Ag(I) and Tl(I) Precursors as Transfer Agents of a Pyrrole-Based Pincer Ligand to Late Transition Metals

11-11-2014 | Julie A. Kessler; Vlad M. Iluc, Inorganic Chemistry, 2014

A PNP ligand, PNpyrP ((PNpyrP)H = 2,5-bis((di-iso-propylphosphino)methyl)pyrrole), which employs a pyrrole unit as a central anionic nitrogen donor, was designed. The corresponding group 10 metal chlorides as well as iridium and ruthenium compounds were isolated. In order to conduct this work, ...

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Iso- and Syndio-Selective ROMP of Norbornene and Tetracyclododecene: Effects of Tacticity Control on the Hydrogenated Ring-Opened Poly(cycloolefin)s

07-11-2014 | Shigetaka Hayano; Yuki Nakama, Macromolecules, 2014

Isospecific and syndioselective ring-opening metathesis polymerizations (ROMP) of norbornene (NB) and tetracyclododecene (TCD), as well as their tactic (and atactic) hydrogenated ring-opened polymer products have been thoroughly investigated for the first time. In the case of NB polymerization, ...

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Tetrametallic lanthanide(III) phosphonate cages: synthetic, structural and magnetic studies

04-11-2014 | Karzan H. Zangana; Eufemio Moreno Pineda; Richard E. P. Winpenny, Dalton Transactions, 2014

The synthesis, structures and magnetic properties of a family of lanthanide complexes containing phosphonate ligands are reported. Reaction of hydrated lanthanide nitrate and tbutylphosphonic acid under reflux conditions in iso-butanol, in the presence of pivalic acid as a co-ligand produced five ...

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Highly Iso-Selective and Active Catalysts of Sodium and Potassium Monophenoxides Capped by a Crown Ether for the Ring-Opening Polymerization of rac-Lactide

04-11-2014 | Jinjin Zhang; Jiao Xiong; Yangyang Sun; Ning Tang; Jincai Wu, Macromolecules, 2014

Sodium and potassium complexes supported by a bulky monophenoxy with one xanthenyl group at the ortho-position and 18-crown-6 or 15-crown-5 as an auxiliary ligand were synthesized and characterized. These complexes are highly iso-selective and active catalysts for the controlled ring-opening ...

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Entropy, Vol. 16, Pages 5698-5711: Sample Entropy and Traditional Measures of Heart Rate Dynamics Reveal Different Modes of Cardiovascular Control During Low Intensity Exercise

31-10-2014 | Weippert, Matthias ; Behrens, Martin ; Rieger, Annika ; Behrens, Kristin, Entropy, 2014

Nonlinear parameters of heart rate variability (HRV) have proven their prognostic value in clinical settings, but their physiological background is not very well established. We assessed the effects of low intensity isometric (ISO) and dynamic (DYN) exercise of the lower limbs on heart rate ...

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ChemInform Abstract: Mechanosynthesis of Pharmaceutically Relevant Sulfonyl‐(thio)ureas.

23-10-2014 | Davin Tan, Vjekoslav Strukil, Cristina Mottillo, Tomislav Friscic, ChemInform, 2014

Abstract The first application of mechanochemistry to conduct the synthesis of sulfonyl‐(thio)ureas (III), (VI), and (X), including antidiabetic drugs tolbutamide, chlorpropamide (VIa) and glibenclamide (X) by either stoichiometric base‐assisted or Cu‐catalyzed coupling of sulfonamides and ...

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