Results 101 to 110 of about 221,946 (289)

Soil Pollution by Toxic Metals near E-waste Recycling Operations in Ibadan, Nigeria

Journal of Health and Pollution, 2016
Background. Unsound recycling of e-waste releases toxic metals into environmental media and has deleterious health consequences to humans as the metals transfer to humans through the food chain, direct contact and inhalation. Objectives.
Michael D. Adesokan, Gilbert U. Adie, Oladele Osibanjo   +2 more
doaj   +1 more source

Integrating Photoredox and Anion‐Binding Capabilities into a Metal–Organic Cage for Iodine Speciation and Sequestration

Aggregate, EarlyView.
The environmental persistence and health risks associated with iodine species necessitate the development of innovative materials for precise iodine management. Here, a triazatriangulenium‐based coordination cage, combining structural stability, guest recognition, and photoredox activity, demonstrates significant potential to address challenges in ...
Ruiyu Guan, Jesper D. Jensen, Shihang Liang, Gen Li, Yawei Liu, Roy Lavendomme, Bo W. Laursen, En‐Qing Gao, Dawei Zhang   +8 more
wiley   +1 more source

Realization of a Heteroatom‐Transfer‐Ligand (HTL) Platform: Oxy Insertion at a Titanium–Alkyl Bond Facilitated by a Hydroxylaminato Ligand Framework

Angewandte Chemie, EarlyView.
A concept for carbon‐heteroatom bond functionalization: a Heteroatom‐Transfer Ligand (HTL) platform is demonstrated through oxygen insertion into a titanium‐carbon bond using a hydroxylamide ligand. A synthetic cycle for HTL is presented including kinetic and computational studies.
Thibault Cheisson, Henry H. Wilson, Michael R. Gau, Patrick J. Carroll, Eric J. Schelter   +4 more
wiley   +2 more sources

Selection maintains floral color polymorphism in scarlet paintbrush, Castilleja coccinea, reflecting combined ecological factors

American Journal of Botany, EarlyView.
Abstract Premise Evolutionary theory predicts polymorphism should be rare; however, intraspecific variation in floral color is common and can be attributed to genetic drift, plasticity, or variable selection. Examining floral color polymorphism both within contact zones and across a species' range can reveal the mechanisms maintaining this variation ...
Emma Fetterly, Anna S. Braum, Chloe (Eun Sun) Kim, Katherine E. Wenzell, Mary V. Ashley, Laura Steger, Jeremie B. Fant   +6 more
wiley   +1 more source

Mechanistic Insights into Adsorptive and Catalytic Reactions from Controllable Distributions of Metal Cations (Pd, Pt, Ni, Cr, Cu) as [M‐OH]+1/1Al or M+2/2Al in Zeolites

Angewandte Chemie, EarlyView.
Selective anchoring of divalent metal ions (Pd, Pt, Ni, Cr, Cu) in zeolites as either M2⁺/2Al or [M─OH]2⁺/1Al enables direct comparison of their distinct catalytic roles. Combining reactive test, spectroscopy, and DFT reveals divergent reactivities in ethylene dimerization, Wacker oxidation, SCR, NO adsorption, and methane oxidation. Abstract Anchoring
Nicholas R. Jaegers, Miroslaw A. Derewinski, Eric D. Walter, Iskra Z. Koleva, Daria Boglaienko, Dhruba J. Deka, Garam Lee, Trent R. Graham, Libor Kovarik, Yong Wang, Janos Szanyi, Hristiyan A. Aleksandrov, Konstantin Khivantsev   +12 more
wiley   +2 more sources

Causes of delayed angiosperm diversification: The photosynthetic revolution, increased opportunity costs of anti‐herbivore defenses, selection for qualitative toxins, and acceleration of plant–herbivore coevolution

American Journal of Botany, EarlyView.
Abstract Why did it take so long for angiosperms to diversify after they arose? Here I consider the indirect but potentially crucial impact of the “photosynthetic revolution” on plant–herbivore coevolution. Increased vein density in fossil leaves implies a doubling in photosynthesis 125–100 million years ago.
Thomas J. Givnish
wiley   +1 more source

N‐Doped Nonalternant Molecular Bowl/Saddle Hybrids

Angewandte Chemie, EarlyView.
N‐Doped molecular bowl/saddle hybrids were developed via core‐expansion synthetic strategy. Owing to the structural features containing both positive and negative curvatures, these molecules exhibit unique molecular dynamics, photophysical properties and multiple guest bindings. Abstract Herein, we report the straightforward synthesis and properties of
Shuhai Qiu, Kai Chen, Ziqi Deng, Xuan Jin, Zuoyu Li, Guogang Liu, Li Zhang, Wei Jiang, Teng‐Teng Chen, Junzhi Liu, Zhaohui Wang   +10 more
wiley   +2 more sources

Speciation of The Warbling Vireo

, 2021
Maygan Peck, Richard Hedley, Samuelle Simard‐Provençal, Chloe Riesen-Sivard, Erin M. Bayne   +4 more
openalex   +1 more source

The polyploid continuum and the landscape of polyploid genomic variation

American Journal of Botany, EarlyView.
Abstract Polyploid research has traditionally distinguished between autopolyploids and allopolyploids on the basis of evolutionary origins, modes of inheritance, or chromosomal pairing behavior during meiosis. It has long been recognized, however, that a binary classification does not accurately reflect the complexity and diversity inherent to ...
Alex D. Twyford, Justin L. Conover, Jeff J. Doyle, Annaliese S. Mason, Douglas E. Soltis, Pamela S. Soltis, Jonathan F. Wendel   +6 more
wiley   +1 more source

American highbush cranberry maintains strong population structure despite naturalization of Eurasian relatives in North America

American Journal of Botany, EarlyView.
Abstract Premise The proper classification of taxa is often debated, particularly when organisms lack qualitative diagnostic traits. Highbush cranberry taxa (Viburnum spp.) have been the subject of such disputes since their characterization by 18th‐ and 19th‐century botanists. Despite their allopatric distributions—V.
David G. Tork, Neil O. Anderson, Anthony Brusa, Alan G. Smith   +3 more
wiley   +1 more source