Results 71 to 80 of about 138,606 (361)

Biogenic Sedimentary Structures

, 2015
Biogenic sedimentary structures are evidence of organism–substrate interactions preserved in rocks and sediments, including those recorded in estuarine environments. Their study is termed “paleoichnology” (from the Greek palaios 1⁄4 old, ancient and ichnos 1⁄4 a trace, a track), whereas similar studies in modern sediments are referred to as ...
openaire   +1 more source

Extremes in dune preservation: controls on the completeness of fluvial deposits [PDF]

, 2015
Understanding sedimentary preservation underpins our ability to interpret the ancient sedimentary record and reconstruct palaeoenvironments and palaeoclimates.
Amsler, Mario Luis, Best, James L., Hardy, Richard J., Orfeo, Oscar, Parsons, Daniel R., Reesink, Arnold J., Szupiany, Ricardo Nicolas, Van den Berg, J. H.   +7 more
core   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Microscopic biomorphic structures in Upper Cretaceous marine sedimentary pyrite

Revista Mexicana de Ciencias Geológicas, 2016
The purpose of this work is to provide a description of biomorphic structures found in sedimentary pyrite present in the organic-rich marine limestone of the Agua Nueva Formation (Upper Cenomanian, Upper Cretaceous), central Mexico, using scanning ...
Alberto Blanco, Susana Abigail Ángeles-Trigueros, Juan Hernández-Ávila, Luis E. Silva-Martínez, Francisco Javier Zavala-Díaz de la Serna, Silvia Patricia Ambrocio-Cruz, Carlos Castañeda-Posadas   +6 more
doaj   +1 more source

Guide to the geology of Bradgate Park and Swithland Wood, Charnwood Forest [PDF]

, 2010
Charnwood Forest is one of the few parts of England where there are exposures of ‘basement’ rocks dating back to Precambrian time. Its locally rugged topography is caused by these highly resistant rocks protruding as craggy knolls through a surrounding ...
Carney, J.N.
core  

Seismic characteristics of sediment drifts: An example from the Agulhas Plateau, southwest Indian Ocean [PDF]

, 2001
Sediment drifts provide information on the palaeoceanographic development of a region. Additionally, they may represent hydrocarbon reservoirs. Because of this, sediment drift investigation has increased over the last few years. Nevertheless, a number of
Uenzelmann-Neben, Gabriele
core   +1 more source

Cutaneous Melanoma Drives Metabolic Changes in the Aged Bone Marrow Immune Microenvironment

Aging and Cancer, EarlyView.
Melanoma, the deadliest form of skin cancer, increasingly affects older adults. Our study reveals that melanoma induces changes in iron and lipid levels in the bone marrow, impacting immune cell populations and increasing susceptibility to ferroptosis.
Alexis E. Carey, Murilo Ramos Rocha, Cheyenne Palm, Vania Wang, Denys Balandin, Ethan Black, Kevin Y. Zhang, Fan Huang, Daniel J. Zabransky, Yash Chhabra, Mareike Peters, Gabriel Ghiaur, Ashani Weeraratna   +12 more
wiley   +1 more source

Syngenetic sand veins and anti-syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada [PDF]

, 2007
Sand-sheet deposits of full-glacial age in the Tuktoyaktuk Coastlands, western Arctic Canada, contain syngenetic sand veins 1-21 cm wide and sometimes exceeding 9 m in height.
Bateman, Bateman, Berg, Brookfield, Burn, Carter, Carter, Dallimore, Dinter, Dostovalov, Dylik, Environment Canada, French, French, Ghysels, Gozdzik, Harry, Hopkins, Julian B. Murton, Kasper, Kasse, Kocurek, Kolstrup, Kolstrup, Kolstrup, Kolstrup, Koster, Koster, Koster, Lea, Lea, Lea, Lewkowicz, MacDonald, Mackay, Mackay, Mackay, Mackay, Mackay, Mackay, Mackay, Mackay, Mark D. Bateman, Melnikov, Murton, Murton, Murton, Péwé, Rampton, Ritchie, Sher, Sletten, Taylor, Van der Hammen, Vandenberghe, Vasil'chuk, Worsley, Yershov   +57 more
core   +1 more source

Composite Electrospun Fibers Containing Optimized B‐ and Cu‐Doped Bioactive Glass Sol‐Gel Particles for Potential Soft Tissue Engineering Applications

Advanced Engineering Materials, EarlyView.
This article describes the preparation and characterization of poly(ε‐caprolactone) electrospun composite fibers incorporating sol‐gel‐derived bioactive glass particles doped with B and Cu. Scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier‐transform infrared spectroscopy, contact angle, acellular bioactivity, mechanical and ...
Elisa Piatti, Marta Miola, Liliana Liverani, Paolo Sartori, Enrica Verné, Aldo R. Boccaccini   +5 more
wiley   +1 more source

Anatomy of modern sedimentary volcanoes produced by gas‐charged groundwater liquefaction, Lake Powell, Hite, Utah: Implications for the recognition and interpretation of ancient sedimentary volcanoes

The Depositional Record
Numerous sedimentary volcanoes, recently exposed on the Colorado River delta surface at Lake Powell near Hite, Utah, were generated by sediment slurries propelled by gas, mainly microbially generated methane (CH4).
Michael C. Wizevich, Edward L. Simpson, Abigail Underwood, Laura Sherrod, Kelsey Livingston, Emily Bogner, Margariete Malenda   +6 more
doaj   +1 more source