Results 111 to 120 of about 9,888 (286)

Revised Miocene splice, astronomical tuning and calcareous plankton biochronology

, 2013
The distinctly cyclic sediments recovered during ODP Leg 154 played an important role in constructing the astronomical time scale and associated astro(bio)chronology for the Miocene, and in deciphering ocean–climate history.
Zeeden, C., Westerhold, Thomas, Lourens, Lucas Joost, Bickert, Torsten, Torsten Bickert (6958880), Westerwold, T., Hilgen, Frederik J, Ursula Röhl (6959540), Zeeden, Christian, Christian Zeeden (6961799), Röhl, Ursula, Lucas Joost Lourens (6966383), Hilgen, F., Frederik J Hilgen (6966380), Thomas Westerhold (6960026), Lourens, L.   +15 more
core   +1 more source

A Circuit of Mechanically Regulated Transcription Factors Balances Regenerative and Fibrotic Memory of Mesenchymal Stromal Cells

Advanced Science, EarlyView.
Producing MSCs on rigid culture substrates induces a scar‐making phenotype, jeapordizing therapeutic success. ‘Tissue‐soft’ surfaces prevent MSC fibrogenesis and preserve regenerative traits. An epigenetic network, driven by HOXA11 and SALL1, maintains ‘soft memory’ by keeping chromatin open in relaxed MSCs, promoting anti‐fibrotic programs.
Fereshteh Sadat Younesi, Andrew E. Miller, Li Diao, Xinying Guo, Natalie Andonian, Elham Karimizadeh, Thomas H. Barker, Boris Hinz   +7 more
wiley   +1 more source

Astronomically Constrained Third-Order Sequence Stratigraphy of the Eocene Eh₃ Member in the Lacustrine Biyang Depression, Central China

Applied Sciences
The middle Eocene represents a shift from the Early Eocene greenhouse climate to a subsequent cooling trend, during which orbital-scale forcing exerted a strong influence on continental depositional systems.
Dan Ye, Yiping Zhang, Binbin Hao, Xuewei Xiao, Xue Yan, Jian Wang, Ke Xu   +6 more
doaj   +1 more source

The astronomical calibration of the Givetian (Middle Devonian) time scale (Dinant Synclinorium, Belgium).

, 2013
peer reviewedRecent advances in radiometric dating result in significant improvements in the geological timescale and provide better insight into the timing of various processes and evolutions within the Earth’s system.
Pas, Damien, Labaye, Corentin, De Vleeschouwer, David, Da Silva, Anne-Christine, Claeys, Philippe, Boulvain, Frédéric   +5 more
core   +1 more source

Seedless One‐Pot Synthesis of Colloidal InAs Quantum Dots Enabling a High‐Accuracy Photoplethysmography Oximeter

Advanced Science, EarlyView.
A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim, Seungin Jee, Yongnam Ahn, In‐Suh Lee, Dongeon Kim, Seongchong Park, Yujin Jung, In‐Ho Bae, Se‐Woong Baek   +8 more
wiley   +1 more source

Symmetry‐Driven Unconventional Magnetoelectric Coupling in Perovskite Altermagnets: From Bulk to the Two‐Dimensional Limit

Advanced Science, EarlyView.
The symmetry‐driven coexistence of altermagnetism and (anti)ferroelectricity in perovskites shows a strong dimensional dependence. Upon reducing the system from bulk to the two‐dimensional limit, only C‐type antiferromagnetic order retains ferroelectrically switchable altermagnetism, whereas A‐ and G‐type orders become conventional antiferromagnets ...
Zhou Cui, Ziye Zhu, Xunkai Duan, Bowen Hao, Xianzhang Chen, Jiayong Zhang, Tong Zhou   +6 more
wiley   +1 more source

Astronomic forcing climate changes recorded in the Late Cretaceous Nenjiang Formation, Gulong area, Songliao Basin, NE China

Frontiers in Earth Science
The Songliao Basin preserves a complete Cretaceous continental sedimentary succession. Previous researchers have conducted extensive cyclostratigraphic studies on the Upper Cretaceous Nenjiang Formation, but paleoclimatic research has primarily focused ...
Yubin Guo, Jinyou He, Shaobin Guo
doaj   +1 more source

Biomimetic Polymerization of Tellurocysteine: Breaking the Natural Amino Acid Radioprotection Limitation

Advanced Science, EarlyView.
Inspired by natural amino acid polymer‐melanin systems, this study strategically incorporated tellurocysteine to develop advanced radiation‐shielding materials. This approach transformed the primary interaction mechanism between melanin‐based materials and incident photons from Compton scattering to the photoelectric effect. Tellurocysteine‐polymerized
Wei Chen, Hanjie Zhu, Yue Zhang, Yuqing Qiao, Ruotong Deng, Huaping Xu, Wei Cao   +6 more
wiley   +1 more source

Extending the astronomical calibration of the geological time scale

This thesis arises from the fact that changes in the geometry of the Earth-Sun system, due to the gravitational interaction among the planets, cause quasi-cyclic climatic variations that are imprinted in the geological record. A speech-recognition method is adapted to provide an automated procedure to calibrate cyclic geological data to astronomical ...
openaire   +1 more source

Time scale of disk and planet formation

, 2014
[[abstract]]We review the current theories and observations of the formation of Sun-like stars and protoplanetary disks in distributed and clustered environments. The astrophysical estimates for the temporal durations of various phases of the process are
Shu, F.H.
core