Effect of chloride on the chemical conversion of nitrate to nitrous oxide for δ15N analysis [PDF]
, 2009 We investigate the influence of chloride concentration on the performance of the chemical reduction method for measurement of the nitrogen isotopic ratio (δ15N) in NO3− in natural waters (McIlvin and Altabet, 2005).
Altabet, Mark A. +2 more
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Angewandte Chemie, EarlyView.Metal‐catalyzed enantioconvergent substitutions of unactivated cyclic electrophiles by organometallic nucleophiles have not previously been reported. Herein, a chiral nickel catalyst is described that achieves this objective, coupling 3‐iodopyrrolidine derivatives with arylzinc nucleophiles.
Ting Hei Matthew Wong +2 more
wiley +2 more sources
A One-Hole Cu\u3csub\u3e4\u3c/sub\u3eS Cluster with N\u3csub\u3e2\u3c/sub\u3eO Reductase Activity: A Structural and Functional Model for Cu\u3csub\u3eZ\u3c/sub\u3e [PDF]
, 2016 During bacterial denitrification, two-electron reduction of N2O occurs at a [Cu4(μ4-S)] catalytic site (CuZ*) embedded within the nitrous oxide reductase (N2OR) enzyme.
Antholine, William E. +4 more
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Out‐of‐Equilibrium Supramolecular Assembly Sustained by Photocatalysis
Angewandte Chemie, EarlyView.Catalysis sustains structure: A Pt(II) supramolecular photocatalyst persists in a far‐from‐equilibrium state only as long as it remains photocatalytically active. Without ongoing catalytic activity, the system irreversibly relaxes into a thermodynamically stable but inactive state (PtB). Catalysis is essential for sustaining its structure.
E. Pelorosso +5 more
wiley +2 more sources
Speciation without chromatography: Part I. Determination of tributyltin in aqueous samples by chloride generation, headspace solid-phase microextraction and inductively coupled plasma time of flight mass spectrometry [PDF]
, 2001 An analytical procedure was developed for the determination of tributyltin in aqueous samples. The relatively high volatility of the organometal halide species confers suitability for their headspace sampling from the vapour phase above natural waters or
Lam, J. +4 more
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Multiple Headspace Extraction for Benzene and Toluene Quantitative Analysis in Hot Oils [PDF]
Iranica Journal of Energy and EnvironmentIn this article, the concentration of some volatile organic compounds (VOCs) in the hot oil sample of the Pars petrochemical ethylbenzene unit is presented. Pars Petrochemical is one of the largest producers of ethylbenzene in the Middle East.
M. R. Ghavidel, M. Heydari
doaj +1 more source
Plants, 2022 Essential oils are vital constituents of oil-bearing plants. However, their screening still demands harvesting of the plant for laboratory analysis. We report herein a simple, rapid and robust headspace bubble-in-drop microextraction screening technique (
Thabiso E. Letseka +3 more
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Thermal and photochemical degradation of myoglobin pigments in relation to colour stability of sliced dry-cured Parma ham and sliced dry-cured ham produced with nitrite salt [PDF]
, 2004 Lipophilic and hydrophilic extracts of the red pigments from Parma ham and nitrosylated pigment of dry-cured ham produced with nitrite salt were prepared with acetone/water (75/25 v/v %) solution and aqueous phosphate buffer, respectively.
Adamsen, Christina E. +3 more
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Frontiers in Digital HealthIntroductionOnline chat services have increased mental health care access for young people (12–25 years), yet their effectiveness remains unclear. This is partly due to a lack of consensus about primary client outcomes and clinician actions facilitating ...
Sonia Curll +11 more
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Arab Journal of Forensic Sciences & Forensic Medicine, 2015 A simple, rapid and reliable method for quantitation of cyanide was developed on a headspace gas chromatograph coupled to a flame ionization detector using a HP-Innovax (Polyethylene glycol bonded) column on an Agilent 7890A GC. Cyanide in blood or other
Humera Shafi +9 more
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