Results 111 to 120 of about 4,052,823 (334)

BOUNDARY CONDITIONS OF ATLANTIC EOCENE OXYGEN MINIMUM ZONES

Rivista Italiana di Paleontologia e Stratigrafia, 2020
Biserial heterohelicid foraminifera are paleohydrographic indices for open ocean oxygen minimum zones. Comparison of the depletion of biserial heterohelicid carbon isotope ratios with the carbon isotope contrast through the water column is used to ...
ANNE BOERSMA , ISABELLA PREMOLI SILVA
doaj  

Coupled sulfur and oxygen isotope insight into bacterial sulfate reduction in the natural environment

, 2013
We present new sulfur and oxygen isotope data in sulfate (δ34SSO4 and δ18OSO4 respectively), from globally distributed marine and estuary pore fluids. We use this data with a model of the biochemical steps involved in bacterial sulfate reduction (BSR) to
G. Antler, A. Turchyn, V. Rennie, B. Herut, O. Sivan   +4 more
semanticscholar   +1 more source

Solvent‐Free Synthesis of Ultrabright Carbon Dots With Near‐Unity Quantum Yield for High‐Performance Light‐Emitting Diodes

Advanced Science, EarlyView.
A rational, solvent‐free synthesis utilizing 2,6‐diaminonaphthalene produces ultrabright green‐emissive carbon dots. Regulated by a self‐limiting oxidative capping mechanism, excitons undergo ultrafast intra‐particle funneling from the nitrogen‐doped carbon core to emissive surface traps.
Hyeonjin Park, Su Hwan Lee, Sejeong Seo, Soye Park, Soo min Ji, Hyunda Jo, Sehyeon Park, Young‐Hoon Kim, Woosung Kwon   +8 more
wiley   +1 more source

Multi-isotope analysis reconstructs termite feeding in chimpanzees

Scientific Reports
Multi-isotope analyses of extant and extinct animals provide key insights into dietary ecology. Here, we examined mineral-bound nitrogen isotopes alongside carbonate carbon and oxygen stable isotope ratios in tooth enamel from sympatric chimpanzees ...
Sven Brömme, Vicky M. Oelze, Alfredo Martínez-García, Jennifer N. Leichliter, Gerald H. Haug, Hubert B. Vonhof, Fiona A. Stewart, Alex K. Piel, Tina Lüdecke   +8 more
doaj   +1 more source

(Table 4) Stable carbon and oxygen isotope ratios of foraminifera from DSDP Leg 39

, 1979
(Table 4) Stable carbon and oxygen isotope ratios of foraminifera from DSDP ...
Quentin Given (7915238), Nicholas J Shackleton (6886052), Hall, Michael A, Anne Boersma (6886019), Michael A Hall (6973691), Q. Given, Boersma, Anne, A. Boersma, N. Shackleton, M. Hall, Shackleton, Nicholas J, Given, Quentin   +11 more
core   +1 more source

In Situ Bioorthogonal Synthesis of PROTACs via Dual‐Responsive Cleavage for Synergistic Photo‐Immunotherapy

Advanced Science, EarlyView.
A bioactive self‐delivering SNAP‐TAC platform responds to tumor‐associated cathepsin B and glutathione, enabling in situ bioorthogonal synthesis of a BRD4‐degrading proteolysis‐targeting chimera within the tumor microenvironment. The resulting BRD4 degradation and PD‐L1 downregulation synergize with photodynamic therapy‐induced immunogenic cell death ...
Shiqin Jian, Jiasha Wu, Fusheng Xu, Yan Zuo, Huaxing Shen, Rui Ji, Luyi Wang, Na Li, Yanting Sun, Yongsheng Yu, Yejiao Shi, Honggang Hu, Feng Xu, Dan Huang, Xiaochun Hu   +14 more
wiley   +1 more source

cis‐Carboxylate Enhancement of Mn(III)‐OH Hydrogen Atom Abstraction through PCET Thermodynamics

Advanced Science, EarlyView.
ABSTRACT Manganese(III)‐hydroxo intermediates are proposed as key hydrogen atom abstraction (HAA) species in manganese‐dependent enzymes, yet how first‐sphere carboxylate ligands control their proton‐coupled electron transfer (PCET) thermodynamics remains poorly understood.
Yuri Lee, Yujin Sim, Sehun An, Kyung‐Bin Cho, Jaeheung Cho   +4 more
wiley   +1 more source

Osmium Nanoparticle Anchoring on CoFe Layered Double Hydroxides Enables High‐Valent Species Stabilization and Efficient Seawater Oxygen Evolution

Advanced Science, EarlyView.
Osmium nanoparticles anchored on CoFe layered double hydroxide (Os/CoFe LDH) stabilize high‐valent Co/Fe species and modulate the interfacial water configuration via surface engineering. This work presents a facile surface engineering strategy for constructing efficient and durable OER electrocatalysts for alkaline seawater, and expands the ...
Xindong She, Guosheng Zhou, Kanghua Miao, Junjie Gong, Mingzhe Jiang, Xueting Zhu, Zhenzhen Wang, Shijie Shen, Wenwu Zhong   +8 more
wiley   +1 more source

Pollen- and oxygen-isotope analyses of late- and postglacial sediments from the Schwemm raised bog near Walchsee in Tirol, Austria

, 1989
Oxygen-isotope and pollen analyses were carried out on late- and postglacial (Late Weichselian and Holo-cene) sediment samples of the raised bog.
Oeggl, Klaus, Eicher, Ueli
core   +1 more source

Cryo‐EM and NMR Reveal a Membrane‐Gated Doc2B–Munc13‐1 Complex and a Helical Doc2B‐SNARE‐Binding Interface

Advanced Science, EarlyView.
Biophysical studies of Doc2B yield a cryo‐electron microscopy structure of its complex with the synaptic vesicle priming factor Munc13‐1 and its binding site to the SNARE complex that mediates synaptic vesicle fusion. These and other results suggest a novel model whereby Doc2 proteins regulate neurotransmitter release through sequential interactions ...
Cyrus T. Rastegar, Julia Powell, Aleksandra Wosztyl, Guillaume David, Klaudia Jaczynska, Xiao‐chen Bai, Yan Han, Zhe Chen, Josep Rizo   +8 more
wiley   +1 more source