Results 51 to 60 of about 2,286 (179)

A 14,000‐Year Sediment Record of Mercury Accumulation and Isotopic Signatures From Lake Malaya Chabyda (Siberia)

Journal of Geophysical Research: Biogeosciences, Volume 129, Issue 10, October 2024.
Abstract Eurasian permafrost soils contain large amounts of organic carbon (OC) and mercury (Hg), sequestered by vegetation during past and present interglacial periods. Lake sediment archives may help understand past OC and Hg dynamics and how they interact with climate‐related variables.
Lara Hughes‐Allen, Frédéric Bouchard, Boris K. Biskaborn, Sahara Cardelli, Dmitry A. Subetto, Laure Laffont, Jeroen E. Sonke   +6 more
wiley   +1 more source

A history of strategies and a tapestry of triumphant tales in tackling plant fungal diseases

Plant Pathology, Volume 73, Issue 7, Page 1619-1628, September 2024.
Here we review several major historical triumphs made by plant pathologists and breeders to tackle fungal diseases predominantly of the top five food crops—rice, wheat, maize, soybean and potato. Abstract Ever since the first crops were domesticated over 10,000 years ago, pests and pathogens have wreaked havoc on crop production.
Sarah L. Bailey, Césarée Morier‐Gxoyiya, Swathy Puthanvila Surendrababu, Diane G. O. Saunders   +3 more
wiley   +1 more source

Green Metrics and Sustainability in Photocatalysis

ChemCatChem, Volume 16, Issue 14, July 22, 2024.
Lights and shadows in photocatalysis. This Review analyzes the sustainability of photoredox catalytic processes in the context of mass‐based metrics, highlighting significant sustainability issues in photocatalysts synthesis and in catalytic protocols, primarily driven by energy demanding preparations and by solvent intensive work‐up and purification ...
Arianna Quintavalla, Davide Carboni, Marco Lombardo   +2 more
wiley   +1 more source

Complexity-generating hydration reactions via gold-catalyzed addition of boronic acids to alkynes [PDF]

, 2012
Boronic acids can serve as organic soluble substitutes for water molecules in the metal-catalyzed hydration of alkynes. The Au-catalyzed addition of boronic acids to alkynes provides an alternative method for enolate generation, which proceeds under ...
Sheppard, TD
core   +1 more source

Towards the Stable Binding of Mercury: Synthesis and Functionalization of Dibenzyldiazabicyclononane Scaffolds

European Journal of Organic Chemistry, Volume 27, Issue 25, July 1, 2024.
Mercury was safely caged into a dibenzyldiazabicyclononane scaffold to ensure the stable preparation of organomercurials for later radiotracer applications in nuclear medicine. The chosen synthesis route opens the easy introduction of different leaving groups for the mercuration process.
Toni Weber, Tobias Krönke, Martin Köckerling, Martin Walther, Hans‐Jürgen Pietzsch, Klaus Kopka, Constantin Mamat   +6 more
wiley   +1 more source

Selectivity Enhancement for Chloride Ion by In(III)‐Porphyrin‐Based Polymeric Membrane Electrode Operated in Pulsed Chronopotentiometric Mode [PDF]

, 2012
A robust selectivity enhancement of an In(III)‐porphyrin ionophore‐based chloride‐selective electrode under pulsed chronopotentiometric measurement mode that enables the detection of chloride ions in the presence of a normally interfering concentration ...
Bakker, Buhlmann, Cha, Dahms, Gemene, Gemene, Gemene, Gemene, Gemene, Hauser, Hofmeister, Khan, Maj-Zurawska, Makarychev-Mikhailov, Oka, Ozawa, Park, Perera, Rothmaier, Shvarev, Steinle, Warwick, Wegmann, Wuthier   +23 more
core   +1 more source

Methylmercury Effects on Birds: A Review, Meta‐Analysis, and Development of Toxicity Reference Values for Injury Assessment Based on Tissue Residues and Diet

Environmental Toxicology and Chemistry, Volume 43, Issue 6, Page 1195-1241, June 2024.
Abstract Birds are used as bioindicators of environmental mercury (Hg) contamination, and toxicity reference values are needed for injury assessments. We conducted a comprehensive review, summarized data from 168 studies, performed a series of Bayesian hierarchical meta‐analyses, and developed new toxicity reference values for the effects of ...
Joshua T. Ackerman, Sarah H. Peterson, Mark P. Herzog, Julie L. Yee   +3 more
wiley   +1 more source

Arctic plasmidome analysis reveals distinct relationships among associated antimicrobial resistance genes and virulence genes along anthropogenic gradients

Global Change Biology, Volume 30, Issue 5, May 2024.
We investigated the impact of melting glaciers and wastewater in the Arctic on the aquatic resistome. Plasmids, small genetic carriers known for transferring antibiotic resistance genes among bacteria were our target. By studying these genetic elements in glacial ice and nearby waters of Svalbard, we uncovered the presence of the unique as well ...
Nicoletta Makowska‐Zawierucha, Artur Trzebny, Krzysztof Zawierucha, Vineeth Manthapuri, James A. Bradley, Amy Pruden   +5 more
wiley   +1 more source

Elementary Combinations [PDF]

, 2004
In school and college, we learnt that chemical elements combine with each other to form new substances, compounds, in very well-defined ways, obeying certain scientific rules.
Francis, Darryl
core   +1 more source

Mechanism of efficient anti-Markovnikov olefin hydroarylation catalyzed by homogeneous Ir(III) complexes [PDF]

, 2011
The mechanism of the hydroarylation reaction between unactivated olefins (ethylene, propylene, and styrene) and benzene catalyzed by [(R)Ir(μ-acac-O,O,C^3)-(acac-O,O)_2]_2 and [R-Ir(acac-O,O)_2(L)] (R = acetylacetonato, CH_3, CH_2CH_3, Ph, or CH_2CH_2Ph,
Bhalla, Gaurav, Bischof, Steven M., Borzenko, Andrey, Ess, Daniel H., Ganesh, Somesh K., Goddard, William A., III, Hashiguchi, Brian G., Jones, C. J., Leung, Chin Hin, Liu, Xiang Yang, Lokare, Kapil S., Oxgaard, Jonas, Periana, Roy A., Tenn, William J., III   +13 more
core   +1 more source