Continental drift triggered the Early Permian aridification of North China.

The boundary between wet and arid climate zones in the Tethys Ocean remains challenging to trace, complicating our understanding of global aridification pattern during the Late Carboniferous to Early Permian transition. The North China Block (NCB), situated in the Tethys Ocean, underwent a transition from humid to arid climate during the Early Permian, providing a rare opportunity to trace this climate boundary across this region. Here, we present paleomagnetic evidence indicating that the NCB underwent rapid northward drift between 290 and 281 million years ago.

Disentangling Sources of Momentum Fluctuations in Xe+Xe and Pb+Pb Collisions with the ATLAS Detector.

High-energy nuclear collisions create a quark-gluon plasma, whose initial condition and subsequent expansion vary from event to event, impacting the distribution of the eventwise average transverse momentum [P([p_{T}])]. Disentangling the contributions from fluctuations in the nuclear overlap size (geometrical component) and other sources at a fixed size (intrinsic component) remains a challenge. This problem is addressed by measuring the mean, variance, and skewness of P([p_{T}]) in ^{208}Pb+^{208}Pb and ^{129}Xe+^{129}Xe collisions at sqrt[s_{NN}]=5.

Influence of aqueous solutions of 2-(tetrafluoro(trifluoromethyl)-λ-sulfanyl-ethan-1-ol (CFSF-ethanol) on the stabilization of the secondary structure of melittin: comparison with aqueous trifluoroethanol using molecular dynamics simulations and circular dichroism experiments.

The influence of aqueous solutions of 2-(tetrafluoro(trifluoromethyl)-λ-sulfanyl-ethan-1-ol (CFSF-ethanol) and 2,2,2-trifluoroethanol (TFE) on the secondary structure of melittin was studied using circular dichroism (CD) and molecular dynamics (MD) simulations. In water, melittin transitions into a random coil. However, upon addition of even as little as 1% by volume of CFSF-ethanol, the secondary structure of melittin stabilizes as a helix.

Developing a New Paradigm for Healthcare Delivery: Lessons Learned from Same-Day Access.

Goal: Excessively lengthy wait times for appointments with clinicians are a major source of frustration for patients, and difficulties with access represent a public health problem facing populations across all societies. As delays in care have been associated with inferior outcomes, same-day appointments have been proposed as a patient-centric means of improving healthcare delivery. However, this paradigm represents a radical shift from conventional scheduling tactics, and skepticism has long existed regarding its feasibility and real-world applicability to clinical practice.

Deficiency of Sox7 leads to congenital aortic stenosis via abnormal valve remodeling.

Abnormal valve development is the most common congenital heart malformation. The transcription factor Sox7 plays a critical role in the development of vascular and cardiac septation. However, it remains unclear whether Sox7 is required for heart valve development.