Publications by authors named "Junfeng He"

High-capacity power battery can be attained through the elevation of the cut-off voltage for LiNiCoMnO high-nickel material. Nevertheless, unstable lattice oxygen would be released during the lithium deep extraction. To solve the above issues, the electronic structure is reconstructed by substituting Li ions with Y ions.

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  • The study analyzed 7326 P. aeruginosa isolates from 2005-2023 in Zhejiang Province to track antibiotic resistance trends, focusing on how COVID-19 affected these patterns.
  • Key findings showed a significant rise in resistance to carbapenems, with imipenem resistance increasing from 6.8% to 48.2%, while resistance to aminoglycosides decreased notably during the same period.
  • The research highlighted the importance of adjusting antibiotic prescribing practices, especially during the COVID-19 pandemic, to manage and combat emerging resistance trends effectively.
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  • - Yaks, which thrive in high-altitude environments, have developed unique mechanisms to manage kidney oxygen consumption, helping them avoid damage from low oxygen levels, or hypoxia.
  • - This study found that renal tubular epithelial cells (RTECs) in yaks display lower oxygen consumption and apoptosis rates under chronic hypoxia compared to acute hypoxia, indicating that maintaining reduced oxygen consumption is vital for RTEC survival.
  • - The research highlights that the mitophagy pathway, regulated by the PRKAA2 protein, plays a significant role in managing oxygen consumption and promoting survival of RTECs in hypoxic conditions, with activation of this pathway leading to decreased oxidative phosphorylation and increased glycolysis.
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Zirconium alloys possess excellent wear resistance, which ensures the durability and longevity of the components, making them widely used in medical and other fields. To enhance the functionality of these materials, it is often necessary to fabricate functional microstructures on their surfaces. Electrochemical machining (ECM) techniques demonstrate excellent machining performance for these metals, particularly in the processing of microstructures on complex curved surfaces.

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Linear ultrasonic motors can output large thrust stably in a narrow space. In this paper, a plate linear ultrasonic motor is studied. Firstly, the configuration and operating principle of the Π-type linear ultrasonic motor is illustrated.

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As the most common energy source of spacecraft, photovoltaic (PV) power generation has become one of the hottest research fields. During the on-orbit operation of spacecraft, the influence of various uncertain factors and the unbalanced inertial force will make the solar PV wing vibrate and degrade its performance. In this study, we investigated the influence of mechanical vibration on the output characteristics of PV array systems.

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  • Yaks have adapted to the low oxygen environment of the Qinghai-Tibet Plateau, enabling healthy testis development and sperm formation, largely due to the functionality of Sertoli cells under hypoxic conditions.
  • In this study, researchers sequenced yak Sertoli cells in normal and low oxygen environments, identifying significant changes in 194 mRNAs, 934 LncRNAs, and 129 miRNAs.
  • The findings highlighted that these differential genes are involved in crucial signaling pathways linked to glucose metabolism, immune response, and cellular structures, suggesting adaptations that support spermatogenesis in low-oxygen settings.
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In the underdoped n-type cuprate NdCeCuO, long-range antiferromagnetic order reconstructs the Fermi surface, resulting in a putative antiferromagnetic metal with small Fermi pockets. Using angle-resolved photoemission spectroscopy, we observe an anomalous energy gap, an order of magnitude smaller than the antiferromagnetic gap, in a wide portion of the underdoped regime and smoothly connecting to the superconducting gap at optimal doping. After considering all the known ordering tendencies in tandem with the phase diagram, we hypothesize that the normal-state gap in the underdoped n-type cuprates originates from Cooper pairing.

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The kink structure in band dispersion usually refers to a certain electron-boson interaction, which is crucial in understanding the pairing in unconventional superconductors. Here we report the evidence of the observation of a kink structure in Fe-based superconductor CsCaFeAsF using angle-resolved photoemission spectroscopy. The kink shows an orbital selective and momentum dependent behavior, which is located at 15 meV below Fermi level along the direction at the band with d orbital character and vanishes when approaching the direction, correlated with a slight decrease of the superconducting gap.

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To survive in low-oxygen environments, yaks effectively avoid hypoxia-induced pulmonary arterial hypertension through vascular remodeling. The TGF-β/BMP signaling pathway plays a key role in maintaining the homeostasis of pulmonary artery smooth muscle cells (PASMCs). However, little is known about the molecular regulatory mechanisms by which the TGF-β/BMP signaling pathway contributes to the proliferation of yak PASMCs.

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As the thickness of an ultra-thin flattened heat pipe (UTHP) decreases, the fabrication difficulty increases exponentially, and the thermal performance deteriorates rapidly. In this study, three types of composite wicks were developed for UTHPs with a 0.6 mm thickness: copper foam and mesh wick (CFMW), two layers of different mesh wick (TDMW), and three layers of the same mesh wick (TSMW).

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Short-chain dehydrogenases/reductases (SDRs) are ubiquitously distributed across diverse organisms and play pivotal roles in the growth, as well as endogenous and exogenous metabolism of various substances, including drugs. The expression levels of SDR genes are reportedly upregulated in the fenpropathrin (FEN)-resistant (FeR) strain of Tetranychus cinnabarinus. However, the functions of these SDR genes in acaricide tolerance remain elusive.

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Yaks inhabit high-altitude, low-oxygen regions, where ion transport functions play a crucial role in maintaining intracellular and extracellular ionic balance and regulating pulmonary vascular tension. These functions affect pulmonary ventilation and blood flow rate, aiding tissue development and enhancing oxygen transfer efficiency, thus facilitating better adaptation to hypoxic environments. To investigate the regulatory mechanisms of ion transport-related factors on the growth and development of yak lungs, we employed RNA sequencing (RNA-seq)for sequencing the transcriptome in the lung tissues of neonatal (1-day-old), juvenile (1-year-old), and adult (4-year-old) yaks.

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Atypical gaze patterns are a promising biomarker of autism spectrum disorder. To measure gaze accurately, however, it typically requires highly controlled studies in the laboratory using specialized equipment that is often expensive, thereby limiting the scalability of these approaches. Here we test whether a recently developed smartphone-based gaze estimation method could overcome such limitations and take advantage of the ubiquity of smartphones.

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Background Microwave ablation (MWA) is currently under preliminary investigation for the treatment of multifocal papillary thyroid carcinoma (PTC) and has shown promising treatment efficacy. Compared with surgical resection (SR), MWA is minimally invasive and could preserve thyroid function. However, a comparative analysis between MWA and SR is warranted to draw definitive conclusions.

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The yak is a unique creature that thrives in low-oxygen environments, showcasing its adaptability to high-altitude settings with limited oxygen availability due to its unique respiratory system. However, the impact of hypoxia on alveolar type II (AT2) epithelial cell proliferation in yaks remains unexplored. In this study, we investigated the effects of different altitudes on 6-month-old yaks and found an increase in alveolar septa thickness and AT2 cell count in a high-altitude environment characterized by hypoxia.

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Microplastics (MPs) are ubiquitously present in source water and undergo ultraviolet (UV) aging in aquatic environments before entering drinking water treatment plants. The presence of MPs in drinking water can impact the formation of halogenated disinfection byproducts (DBPs) during chlorine disinfection, yet the exact effect of MPs on DBP formation remain unclear. In this study, we conducted an investigation into the influence of non-aged and UV-aged MPs on halogenated DBP formation in drinking water and unveiled the underlying mechanisms.

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Mercury ions (Hg(II)) in wastewater can accumulate and transform into the highly neurotoxic methylmercury (MeHg) in activated sludge. The release of MeHg can have severe environmental consequences, making the treatment of MeHg-contaminated sludge a pressing concern. In this study, we found that all the collected activated sludge samples, from different wastewater treatment plants in four cities, had the potential for Hg methylation.

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To adapt to the extreme conditions of plateau environments, yaks have evolved thick hair, making them an ideal model for investigating the mechanisms involved in hair growth. We can gain valuable insights into how hair follicles develop and their cyclic growth in challenging environments by studying yaks. However, the lack of essential data on yak hair follicle histology and the absence of cell models for hair follicles serve as a limitation to such research objectives.

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Because of the ease with which oxide films form on its surfaces, stainless steel has strong corrosion resistance and excellent processing performance. Electrochemical machining (ECM) is a flexible process that can create microstructures on stainless steel (SS304); however, with traditional masked ECM, the efficiency and accuracy of microstructure machining are low. Proposed here is the use of a non-Newtonian fluid [polyacrylamide (PAM)] as the electrolyte.

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  • In conventional superconductors, electron-phonon coupling is key to superconductivity, but the mechanisms in high-temperature cuprate superconductors remain uncertain.
  • Recent findings from ultrahigh-resolution laser-based angle-resolved photoemission (ARPES) reveal two electron-mode couplings at 70-meV and 40-meV in various cuprate superconductors, suggesting that these couplings are linked to phonons.
  • The study also uncovers a complex "peak-dip-hump" structure in the electronic properties that indicates more intricate interactions, providing insights into the role of these energy scales in achieving high-temperature superconductivity.
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Recently, the reaction speed and cycle performance of hexavalent chromium reduction over microsized zero-valent iron (ZVI) with an Fe core and iron oxide (FeO) shell structure have been improved by activating the Fe-core electrons through electromagnetic coupling between Fe-core electrons and charges (hexavalent chromium in solution, double-charge layers of the ZVI/solution interface). Herein, the abovementioned electromagnetic coupling was greatly increased by adding salt (CHCOONa, NaCl, NaNO, and NaSO) in the hexavalent chromium solution to increase the charge response. Adding salt greatly improved the reaction speed and cycle performance of hexavalent chromium reduction.

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Background: This study aimed to provide a clinical basis for the therapy of diabetic ketoacidosis (DKA) complicated with acute pancreatitis (AP) through exploring the clinical efficacy of dexamethasone.

Methods: A total of 106 DKA patients complicated with AP admitted to Wuxi People's Hospital Affiliated to Nanjing Medical University from January 2020 to December 2022 were selected and randomly divided into a study group (n = 53) and a placebo group (n = 53) according to the random number table method. The study group patients were given dexamethasone, while the placebo group patients were treated using placebos.

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The research on systems with coexistence of superconductivity and nontrivial band topology has attracted widespread attention. However, the limited availability of material platforms severely hinders the research progress. Here, it reports the first experimental synthesis and measurement of high-quality single crystal van der Waals transition-metal dichalcogenide InNbS , revealing it as a topological nodal line semimetal with coexisting superconductivity.

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In kagome metal CsV_{3}Sb_{5}, multiple intertwined orders are accompanied by both electronic and structural instabilities. These exotic orders have attracted much recent attention, but their origins remain elusive. The newly discovered CsTi_{3}Bi_{5} is a Ti-based kagome metal to parallel CsV_{3}Sb_{5}.

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