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Molecular Design for Dual Circularity: Polyester with Complementary Mechanical and Chemical Recyclability under Mild Conditions.
Angew Chem Int Ed Engl
January 2025
KTH Royal Institute of Technology: Kungliga Tekniska Hogskolan, Department of Fibre and Polymer Technology, SWEDEN.
The plastic waste accumulation requires facile yet effective solutions. Currently mechanical recycling typically leads to downcycling, while the environmental footprint of chemical recycling is often unacceptable. Here, we introduce a dual circularity concept, where rational molecular design paves the way for complementary closed-loop mechanical and chemical recyclability under mild conditions.
View Article and Find Full Text PDFDesign and experimental study of tillage depth control system for electric rotary tiller based on LADRC.
Sci Rep
January 2025
The Key Laboratory for Agricultural Machinery Intelligent Control and Manufacturing of Fujian Education Institutions, Wuyi University, Nanping, 354300, Fujian, China.
This paper proposes an adaptive real-time tillage depth control system for electric rotary tillers, based on Linear Active Disturbance Rejection Control (LADRC), to improve tillage depth accuracy in tea garden intercropping with soybeans. The tillage depth control system comprises a body posture sensor, a control unit, and a hybrid stepper motor, integrating sensor data to drive the motor and achieve precise depth control. Real-time displacement sensor signals are compared with target values, enabling closed-loop control of the rotary tiller.
View Article and Find Full Text PDFBackground: Simulation offers an opportunity to practice neonatal resuscitation and test clinical systems to improve safety. The authors used simulation-based clinical systems testing (SbCST) with a Healthcare Failure Mode and Effect Analysis (HFMEA) rubric to categorize and quantify latent safety threats (LSTs) during in situ training in eight rural delivery hospitals. The research team hypothesized that most LSTs would be common across hospitals.
View Article and Find Full Text PDFCryo-EM reconstruction of yeast ADP-actin filament at 2.5 Å resolution. A comparison with vertebrate F-actin.
Structure
January 2025
Molecular Microbiology, School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK. Electronic address:
The core component of the actin cytoskeleton is the globular protein G-actin, which reversibly polymerizes into filaments (F-actin). Budding yeast possesses a single actin that shares 87%-89% sequence identity with vertebrate actin isoforms. Previous structural studies indicate very close overlap of main-chain backbones.
View Article and Find Full Text PDFDiurnal fluctuations of subthalamic nucleus local field potentials follow naturalistic sleep-wake behavior in Parkinson's disease.
Sleep
January 2025
Department of Neurology, University of Colorado Anschutz Medical Campus, Aurora, CO USA.
Study Objectives: Deep brain stimulation (DBS) of the subthalamic nucleus (STN) may improve sleep dysfunction, a common non-motor symptom of Parkinson disease (PD). Improvement in motor symptoms correlates with DBS-suppressed local field potential (LFP) activity, particularly in the beta frequency (13 - 30 Hz). Although well-characterized in the short term, little is known about the innate progression of these oscillations across the sleep-wake cycle.
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