Most reported probes that respond to Cysteine (Cys) and Hydrogen sulfide (H
S) can only identify one analyte, or they were interfered with homocysteine (Hcy) and glutathione (GSH) when recognizing ...Cys and H
S. In addition, nitrobenzoxadiazole (NBD) ether, as one of thiols recognition sites, inevitably encounters the situation that Cys, GSH and H
S cannot be distinguished on the same channel at the cellular level. In this work, by introducing NBD ether and NBD amine, we constructed a bifunctional fluorescent probe NJB for dual-site response to Cys and H
S via PET & ICT processes. NJB has wonderful selectivity for identifying Cys and HS
, with limits of detection as low as 58.4 nM and 81.1 nM, respectively. Interestingly, NJB has been successfully applied to detect Cys and HS
in MCF-7 cells. Therefore, the probe that serves as a great tool for inquiring the physiological and pathological functions of Cys and H
S in living cells is promising.
The Ti sub(55)V sub(10)Ni sub(35) quasicrystal ribbons are synthesized by arc melting and subsequent melt-spinning technique and then Li atoms are infiltrated into this quasicrystal material by the ...way of electroosmosis. X-ray diffraction results indicate that the pristine quasicrystal Ti sub(55)V sub(10)Ni sub(35) mainly consists of the icosahedral quasicrystal (I-phase), V-based solid solution phase with BBC structure and face centered cubic (FCC) phase with Ti sub(2)Ni-type structure. After infiltrating some amount of Li atoms into Ti sub(55)V sub(10)Ni sub(35) quasicrystal lattice voids at different electroosmosis current density (A/mg) of 0.3, 0.6 and 0.9 respectively, phase structure investigations show that the main phase structures do not change greatly except for the additional lithium phase, which demonstrates that Li does not destroy the phase structure of Ti sub(55)V sub(10)Ni sub(35) quasicrystal. Ti sub(55)V sub(10)Ni sub(35) alloy shows the best discharge capacity is 219.8 mAh g super(-1) at a current density of 30 mA g super(-1). The negative electrode made by Ti sub(55)V sub(10)Ni sub(35)-Li quasicrystal alloys (Li atoms are infiltrated into Ti sub(55)V sub(10)Ni sub(35) quasicrystal alloy at different the electroosmosis current density (A/mg) of 0.3, 0.6 and 0.9 has a maximum discharge capacity of 257.7 mAh g super(-1), 301.8 mAh g super(-1) and 238.7 mAh g super(-1) at a discharge current density of 30 mA g super(-1), respectively. And the high rate discharge ability of alloy electrodes is higher than that of Ti sub(55)V sub(10)Ni sub(35) quasicrystal alloy at 240 mA g super(-1). The Effect of Li on structure of Ti sub(55)V sub(10)Ni sub(35) quasicrystal has been discussed by measuring the place, mass ratio and chemical state that Li infiltrated into quasicrystal Ti sub(55)V sub(10)Ni sub(35) lattice. In addition, the electrochemical reaction kinetics of Ti sub(55)V sub(10)Ni sub(35)-Li quasicrystal alloy electrodes is also studied by measuring both the electrochemical impedance spectroscopy and hydrogen diffusion coefficient.
In this study, we use arc-melting and subsequent melt-spinning techniques to prepare Ti sub(1.4)V sub(0.6)Ni alloy ribbons. The Ti sub(1.4)V sub(0.6)Ni + xTiH (x = 5, 10, 15 and 20 wt.%) mixture ...powders are obtained by mechanical ball-milling. Also, we investigate the structure and electrochemical hydrogen storage properties of composite materials. Besides I-phase, FCC and BCC phase, the XRD of composite materials indicates it contains TiH phase. After adding TiH, the discharge capacities of Ti sub(1.4)V sub(0.6)Ni alloy electrode increase first and then decrease with increasing amount of Ti. The achieved maximum discharge capacity is about 339.8 mA h/g (x= 15 wt.%) at the first discharge cycle. Additionally, composite materials lead to significant improvement in the high-rate dischargeability (HRD) as well as the cyclic stability.
Three ferrocene analogues, D
(η
-CB
H
)
M (M = Fe
, Co
, and Ni), with triplet aromatic CB
H
ligands have been predicted at TPSSh/6-311+G(d,p) level. We find that the M atom interacts drastically ...with the two CB
H
ligands through a nearly fully-filled 3d subshell, which is different from (η
-C
H
)
Fe. The natural population analyses suggest that (η
-CB
H
)
M have an unconventional charge distribution, i.e., the M atom is negatively charged, while the two boron rings are positively charged. The analyses of the electronic and dynamic stabilities indicate that (η
-CB
H
)
Co
is the most stable among (η
-CB
H
)
M. Thus, we theoretically confirm that the triplet aromatic CB
H
cluster can be regarded as a potential new ligand. Our theoretical predictions are awaiting future experimental verification.
Existing deep learning-based surrogate models facilitate efficient data generation, but fall short in uncertainty quantification, efficient parameter space exploration, and reverse prediction. In our ...work, we introduce SurroFlow, a novel normalizing flow-based surrogate model, to learn the invertible transformation between simulation parameters and simulation outputs. The model not only allows accurate predictions of simulation outcomes for a given simulation parameter but also supports uncertainty quantification in the data generation process. Additionally, it enables efficient simulation parameter recommendation and exploration. We integrate SurroFlow and a genetic algorithm as the backend of a visual interface to support effective user-guided ensemble simulation exploration and visualization. Our framework significantly reduces the computational costs while enhancing the reliability and exploration capabilities of scientific surrogate models.
In this work, the responsivity-controlled high performance UV photodetectors fabricated from MgZnO films was investigated with an emphasis on the effect of varying the number of interdigitated ...electrode pairs. The responsivity of MgZnO photodetectors was optimized by increasing the number of interdigital electrode pairs at a given bias. The result is due to the parallel structure of the interdigital electrodes and the depletion width of the Schottky junctions. This demonstrates a straightforward way of tailoring the responsivity of UV photodetectors for practical applications.
•MgZnO UV PDs were fabricated by the radio frequency magnetron sputtering.•Varying numbers of interdigital electrode pairs were designed to control the responsivity.•The parallel effect and the depletion width were used to interpret the characteristic.
We report the fabricating of BiFeO
3
(BFO) and Mn-doped BFO is prepared by the commonly used sol–gel method and obtained various excellent properties. X-ray diffraction patterns present that BFO is a ...pure phase and no impurities are detected and demonstrated that Mn is successfully doped into the BFO crystal structure. X-ray photoelectron spectroscopy analysis suggested that the extent of Mn doping in the samples and check the enhancement of Fe
3+
ions concentration in the nanoparticles. The results of scanning electron microscopy and transmission electron microscope indicated that the morphology and size of the nanoparticles with different Mn doping concentrations. The BFO nanoparticles exhibit weak ferromagnetic nature at general ambient temperature. However, the ratio of Mn ions to Fe ions changes to some extent, and the ferromagnetic behavior also changes, which is mainly due to the collapse of spin cycloid structure and the enhancement of super-exchange interaction between Fe–O–Fe, it can be inferred that Mn-doping has significant importance in increasing the ferromagnetic properties of BFO-based nanoparticles. The photocatalytic performance of Mn-doped BFO nanoparticles has also been further studied, which confirms the potential application value of Mn-doped BiFeO
3
in the field of photocatalysis.
Stomata are one of the important structures for plants to alleviate metal stress and improve plant resistance. Therefore, a study on the effects and mechanisms of heavy metal toxicity to stomata is ...indispensable in clarifying the adaptation mechanism of plants to heavy metals. With the rapid pace of industrialization and urbanization, heavy metal pollution has been an environmental issue of global concern. Stomata, a special physiological structure of plants, play an important role in maintaining plant physiological and ecological functions. Recent studies have shown that heavy metals can affect the structure and function of stomata, leading to changes in plant physiology and ecology. However, although the scientific community has accumulated some data on the effects of heavy metals on plant stomata, the systematic understanding of the effects of heavy metals on plant stomata remains limited. Therefore, in this review, we present the sources and migration pathways of heavy metals in plant stomata, analyze systematically the physiological and ecological responses of stomata on heavy metal exposure, and summarize the current mechanisms of heavy metal toxicity on stomata. Finally, the future research perspectives of the effects of heavy metals on plant stomata are identified. This paper can serve as a reference for the ecological assessment of heavy metals and the protection of plant resources.
Food self-sufficiency in a large country with 1.4 billion people is very important for the Chinese government, especially in the context of COVID-19 and the Russian-Ukrainian conflict. The objective ...of this paper is to explore the spatial-temporal evolution and driving factors of non-grain production in thirteen major grain-producing provinces in China, which account for more than 75% of China's grain production, using 2011-2020 prefecture-level statistics. In the present study, the research methodology included GIS spatial analysis, hot spot analysis, and spatial Durbin model (SDM). The findings of this study are as follows: (1) The regions with a higher level of non-grain production were mainly concentrated in the central and western regions of Inner Mongolia, the middle and lower reaches of Yangtze River and Sichuan, while the regions with a low level of non-grain production were mainly distributed in the Northeast Plain. The regions with a higher proportion of grain production to the national total grain production were concentrated in the Northeast Plain, the North China Plain, and the Middle and Lower Yangtze River Plain of China. The hot spot regions with changes in non-grain production levels were mainly distributed in the Sichuan region and Alashan League City in Inner Mongolia, and the cold spot regions were mainly distributed in Hebei, Shandong, Henan, and other regions. (2) An analysis of the SDM indicated that the average air temperature among the natural environment factors, the ratio of the sum of gross secondary and tertiary industries to GDP, the ratio of gross primary industry to the GDP of economic development level, the urbanization rate of social development, and the difference in disposable income per capita between urban and rural residents of the urban-rural gap showed positive spatial spillover effects. The grain yield per unit of grain crop sown area of grain production resource endowment, the total population of social development, and the area sown to grain crops per capita of grain production resource endowment all showed negative spatial spillover effects. The research results of this paper can provide a reference for the country to carry out the governance of non-grain production and provide a reference for China's food security guarantee.
