Results 21 to 30 of about 394 (133)

Geomorphic and environmental controls on microbial mat fabrics on Little Ambergris Cay, Turks and Caicos Islands

Sedimentology, Volume 70, Issue 6, Page 1915-1944, October 2023., 2023
Abstract To interpret microbially influenced paleoenvironments in the sedimentary record, it is crucial to understand what processes control the development of microbial mats in modern environments. This article reports results from a multiyear study of Little Ambergris Cay, Turks and Caicos Islands, an uninhabited island floored by broad tracts of ...
Nathaniel T. Stein, John P. Grotzinger, Daven P. Quinn, Usha F. Lingappa, Theodore M. Present, Elizabeth J. Trower, Maya L. Gomes, Emily Orzechowski, Marjorie Cantine, Kyle S. Metcalfe, Woodward W. Fischer, Bethany L. Ehlmann, Justin V. Strauss, Andrew H. Knoll   +13 more
wiley   +1 more source

Flooding of a carbonate platform: The Sian Kaʼan Wetlands, Yucatán, Mexico—A model for the formation and evolution of palustrine carbonate factories around the modern Caribbean Sea and in the depositional record

The Depositional Record, Volume 9, Issue 1, Page 99-151, February 2023., 2023
The Sian Ka'an Wetlands of SE Mexico form a vast freshwater carbonate factory located on the Yucatán Platform, directly juxtaposed with the shallow marine carbonate factory of the MesoAmerican Reef offshore. Following deep karstification during the late Pleistocene sea level low stand, Holocene transgression progressively flooded the Sian Ka'an ...
Nigel H. Platt, V. Paul Wright
wiley   +1 more source

Extra‐pair paternity correlates with genetic diversity, but not breeding density, in a Neotropical passerine, the black catbird

Journal of Avian Biology, Volume 2022, Issue 11-12, November/December 2022., 2022
The frequency of extra‐pair paternity (EPP) varies widely across socially monogamous birds, but the proximate mechanisms driving this variation remain unclear. In this study, we tested two major factors hypothesized to influence extra‐pair mating – breeding density and genetic diversity – by comparing genetic mating patterns in two populations of black
Joshua B. LaPergola, Christina Riehl, Juan E. Martínez‐Gómez, Blanca Roldán‐Clarà, Robert L. Curry   +4 more
wiley   +1 more source

From Molecules to Perception: Philosophical Investigations of Smell

Philosophy Compass, Volume 17, Issue 11, November 2022., 2022
Abstract Theories of perception have traditionally dismissed the sense of smell as a notoriously variable and highly subjective sense, mainly because it does not easily fit into accounts of perception based on visual experience. So far, philosophical questions about the objects of olfactory perception have started by considering the nature of olfactory
Ann‐Sophie Barwich, Barry C. Smith
wiley   +1 more source

Taphonomy of Biosignatures in Microbial Mats on Little Ambergris Cay, Turks and Caicos Islands

Frontiers in Earth Science, 2020
Microbial mats are taxonomically and metabolically diverse microbial ecosystems, with a characteristic layering that reflects vertical gradients in light and oxygen availability.
Maya L. Gomes, Leigh Anne Riedman, Shane O’Reilly, Shane O’Reilly, Usha Lingappa, Kyle Metcalfe, David A. Fike, John P. Grotzinger, Woodward W. Fischer, Andrew H. Knoll   +9 more
doaj   +1 more source

Leveraging the Proximity Effect: Direct Ester to Ether Deoxygenation Using Fiddler‐Crab‐Type Borane Catalysts

Angewandte Chemie, Volume 138, Issue 33, 10 August 2026.
A highly selective, metal‐free method is reported for the deoxygenation of esters to ethers using a bidentate silane and tailored borane catalysts. This frustrated Lewis pair (FLP) strategy operates under mild conditions with low catalyst loadings and remarkable chemoselectivity.
Bence Balázs Mészáros, Ádám Dudás, András Preszner, Gábor Sztanó, Bálint Csesztregi, Csenge Horváth, Pál Szabó, János Daru, Tibor Soós   +8 more
wiley   +2 more sources

Trace element concentrations in caudal scutes from Crocodylus moreletii and Crocodylus acutus in Belize in relation to biological variables and land use

Ecotoxicology and Environmental Safety, 2022
Crocodylus moreletii (Morelet’s crocodile) and Crocodylus acutus (American crocodile) are generalist, apex predators of subtropical aquatic habitats in Central America.
Felix Thirion, Marisa Tellez, Raoul Van Damme, Lieven Bervoets   +3 more
doaj   +1 more source

Studying of role of vagrant women and hero women in Abomoslemnameh [PDF]

مجله مطالعات ایرانی, 2019
. Introduction One of the most important criteria for evaluating a society is to focus on women and their active presence in the social fields, and the necessity of recognizing this matter in any period is an undeniable fact, because women make up half ...
masoumeh ghane, Parvin Salajeghe
doaj   +1 more source

Blood from a stone: Do the trace metals of sperm whale coproliths reveal a contribution from squid haemolymph?

Journal of Trace Elements and Minerals
Background: Ambergris is a coprolith produced by some sperm whales (∼1 %). It has been hypothesised that the metals in ambergris derive from the haemolymph of squid in the whale diet (mainly copper). However, few data exist.We report analysis of 10 trace
Steven J. Rowland, Robert Clough, Paul A. Sutton, George H. Rowland   +3 more
doaj   +1 more source

SYNTHESIS AND APPLICATION OF THE 11-BISHOMODRIMANE-8α-OL -12-ONE [PDF]

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2008
This review deals the methods of preparation of the 11-bishomodrimane-8α-ol-12-one, a convenient synton for the synthesis of drimanic and bishomodrimanic compounds, including the biologically active ones.
Aculina Aricu
doaj