Boosted methanol production over MnO x /ZrO 2 catalyst could be achieved via plasma-assisted catalytic CO hydrogenation at ambient temperature and pressure.

Temperature and precipitation are crucial indicators for investigating climate changes, necessitating precise measurements rigorous scientific inquiry. While the Fifth Generation of European Centre Medium-Range Weather Forecasts Atmospheric Reanalysis (ERA5), ERA5 Land Surface (ERA5-Land), China Meteorological Forcing Dataset (CMFD) temperature products widely used worldwide, their suitability Altay region arid semi-arid areas has received limited attention. Here, we as study area, utilizing...

Abstract Understanding the mechanisms influencing forest changes is crucial for developing effective adaptation strategies to mitigate impacts of climate change and anthropogenic factors on ecosystems. In this study, we utilized Theil–Sen median, Mann–Kendall (MK) test, contribution partition, partial least squares (PLS), geodetector, residual analysis methods explore effects human activities cover NDVI in Altai Mountains. For cover, results indicate that both management policies influence...

The arid terrestrial ecosystem carbon cycle is one of the most important parts global cycle, but it vulnerable to external disturbances. As direct factor affecting how land cover change affects vegetation sources/sinks in ecosystems remains unclear. In this study, we chose region northwest China (ARNWC) as study area and used net productivity (NEP) an indicator source/sink. Subsequently, described spatial distribution temporal dynamics ARNWC from 2001–2018 by combining Carnegie-Ames-Stanford...

Purpose: Tuberculosis (TB) is a life threatening global infection. However, not only does TB have high prevalence, but it also associated with several comorbidities. Depression one of the most common and lethal comorbidities patients. Therefore, in order to prevent depression patients more effectively, necessary investigate factors by studying pooled effect each factor statistically. By concluding through statistical analysis, offers accurate guidance for further studies about programs...

An intense luminescence flash can be induced during the collapse phase of bubbles generated by pulsed discharge in water. To gain insight into this special phenomenon, we experimentally investigated optical characteristics and temperature inside collapsing bubbles. The duration was around tens microseconds, which confirmed high-speed recording photodiode output, inception time approximately 32.5 μs before bubble collapsed to its minimum size. temperatures at energies 25 30 J/pulse calculated...

Abstract Plasma‐induced CO 2 hydrogenation process has received much attention, while the related plasma chemistry not been profoundly explored. Herein, electron‐induced and thermochemical effects on in a dielectric barrier discharge reactor were investigated. The temperatures for pattern transition /H , /N /Ar, /He mixtures 623, 600, 600 K, respectively. conversion was controlled by reactions sensitive to electron density but energy. In contrast, product formation governed thermo‐induced...

The plasma sparker has been applied in oceanic high-resolution seismic exploration for decades. Normally it is towed on the water surface. This suitable shallow water, but if depth great, resolution will decrease dramatically, especially horizontal direction. paper proposes concept of a deep-towed and presents an experimental study performance terms electric parameters, bubble behavior, acoustic characteristics. results show that hydrostatic pressure at source ranging from 1 to 2000 m...

In this paper, a simple model was developed to predict the dynamics of spark-induced bubble under different ambient pressures. This work helps in developing deep-towed plasma sparker, as can bubbles subjected very high pressures (about 20 MPa) which normally are difficult obtain experimentally. Experimental results indicate that maximum radius for fixed discharge energy decreases power-law function pressure up 1.0 MPa; period also quickly with increasing pressure. For constant value ratio...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Yifan Huang, Liancheng Zhang, Jim Chen, Xinlei Zhu, Zhen Liu, Keping Yan; Experimental observation of the luminescence flash at collapse phase a bubble produced by pulsed discharge in water. Appl. Phys. Lett. 2 November 2015; 107 (18): 184104. https://doi.org/10.1063/1.4935206 Download citation file: Ris...

The current study aimed to lay a theoretical foundation for further development of choline as an anti‑hypoxia damage drug. Wild‑type, 3‑ 5‑month‑old male Sprague‑Dawley rats, weighing 180‑220 g, were used in this study. rats randomly divided into normoxic control group (n=16) and chronic intermittent hypoxia (CIH) (n=16). effects CIH on acetylcholine (ACh)‑mediated endothelium‑dependent vasodilatation the rat cerebral basilar arterioles mesenteric arterioles, well protective damaged by...

All types of seismic sources have a common feature in which large energy is released into water short time to produce an intense acoustic pulse. For plasma sparker, the discharge mainly determined by circuit parameters. Providing accurate prediction pulse difficult because complex process and unclear initial bubble condition. This paper presents first experimental study on influence electric width pulses, especially expansion Three comparative experiments are conducted investigate effect...

Pulsed discharge in conductive water can produce a plasma-containing bubble and radiate intensive acoustic pulses. The dynamics, which determines the characteristics of wave, is sensitive to temperature ambient pressure. This paper presents high-speed records behavior under different temperatures range 18 °C-80 °C pressure 0.1-1 MPa. results show that higher generates larger bubble, oscillation period, efficiency conversion electric energy into energy. increase fast with since rise initial...

Sparker sources have been widely applied in high-resolution seismic explorations. However, to date, there exists no model that can directly predict the electro-acoustic characteristics of a sparker source with multi-electrode array. In this Letter, we propose an analytical water-resistance yields more accurate loop current. A simplified energy conservation and multi-bubble dynamics equations are used evaluate process. Considering bubble interaction will give better prediction dynamics....

Deep-towed multichannel seismic exploration technology has better applicability and more development potential when utilized to invert the geoacoustic properties of deep-sea sediment. The accurate geometric inversion results receiving array are crucial for fine submarine sediment imaging physical property parameter based on deep-towed data. Thus, this study presents an geometry method suitable complex seafloors address challenge precise source-receiver positioning. objective function is...

Bubbles generated by a pulsed discharge in water can emit extensive acoustic waves. The bubble behavior is quite important for the electroacoustic analysis. This paper presents high-speed photographs of plasma-containing under discharges different polarities, including single negative bubble, positive and bipolar bubbles. results show that electrobubble energy transition rate higher than discharge. has longer oscillation period lower fundamental frequency one. For bubbles, interaction...

Abstract We investigated the behavior of single bubbles generated by spark discharge under different electric fields and water properties. A higher energy is known to generate a larger bubble. However, our results show that hydraulic efficiency decreases with increasing charging voltage, but increases capacitance. found conductivity has little influence on bubble behavior, whereas temperature generates efficiency. The experimental agreed well those Rayleigh–Plesset model. Overall, for...