Though coating CsPbBr3 nanocrystal (NC) with an outer layer has been regarded as an effective strategy to address its instability issues, deep investigations into the electronic interaction between ...CsPbBr3 NC and coating layer have yet to be conducted. In this study, the dynamics of hot carrier and charge carrier of CsPbBr3 nanocrystal with various MO2 (M = Si, Ti, Sn) coating layers have been comprehensively studied. Combined transient optical characterizations (time-resolved photoluminescence and ultrafast transient absorption) and photoelectrochemical measurements reveal that coating with insulating SiO2 accelerates the hot carrier relaxation and enhances the radiative recombination by passivating surface traps, whereas efficient charge-carrier separation and extraction are observed after coating with SnO2 and TiO2. The electron injection from CsPbBr3 NC to SnO2 (1.14 × 108 s–1) is 2-fold faster than to TiO2 (5.4 × 107 s–1) owing to the lower conduction band edge and the higher electron mobility of SnO2. Particularly, the first time fabricated CsPbBr3 NC/SnO2 composite exhibits superior stability against UV light and moisture, as well as the best photocurrent response in this study. This work has implied that rational design of the coating layer for perovskite NC can not only improve the stability but also tailor the electronic and optoelectronic properties for various applications.
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IJS, KILJ, NUK, PNG, UL, UM
Based on UG10.0 software as the secondary development platform, the UG/MenuScript and UG/KF (knowledge fusion) language are used in this paper to develop a computer-aided design system for casting ...process (CAD-CP). The CAD-CP system is divided into five parts: information acquisition module, riser design module, runner design module, sprue cup design module, and subsidized design module. To test the effectiveness of the designed system, a typical disk part of flywheel casting process is investigated by the CAD-CP system, where the process structures are designed and the process parameters are obtained. Besides, the numerical simulation of flywheel casting by ProCAST software and experiment are carried out, and the results show that the experiment is consistent with the numerical simulation. It indicates that the as-designed CAD-CP system would meet the standard of the casting process, where the design workload of the casting process is reduced effectively as well as the design efficiency is improved.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
We designed and synthesized a 976,067-base pair linear chromosome, synXII, based on native chromosome XII in
SynXII was assembled using a two-step method, specified by successive megachunk ...integration and meiotic recombination-mediated assembly, producing a functional chromosome in
Minor growth defect "bugs" detected in synXII, caused by deletion of tRNA genes, were rescued by introducing an ectopic copy of a single tRNA gene. The ribosomal gene cluster (rDNA) on synXII was left intact during the assembly process and subsequently replaced by a modified rDNA unit used to regenerate rDNA at three distinct chromosomal locations. The signature sequences within rDNA, which can be used to determine species identity, were swapped to generate a
synXII strain that would be identified as
by standard DNA barcoding procedures.
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BFBNIB, NMLJ, NUK, ODKLJ, PNG, SAZU, UL, UM, UPUK
Nitrite poses a serious threat to intensive aquaculture. Protein, as a major nutrient in animals, is vital for protecting animal tissues from damage. In this study, we investigated the protective ...effect of dietary protein on gill tissue structure and the underlying mechanisms in sub-adult grass carp (Ctenopharyngodon idella) exposed to nitrite stress. Six iso-energetic semi-purified diets containing different protein levels (16–31 %) were formulated, and fed to fish for 60 d. The fish were then exposed to a nitrite solution for 4 d. Histopathological observation and determination of related indices (serum glucose, serum cortisol, nitric oxide, peroxynitrite, reactive oxygen species, malondialdehyde, and protein carbonyl) showed that 22–25 % dietary protein significantly alleviated the nitrite-induced stress response, gill tissue damage and oxidative damage. Further research found that a suitable dietary protein suppressed the nitrite-induced endoplasmic reticulum stress (ERS) 78 kDa glucose-regulated protein (GRP78) related signaling pathway which possibly activated autophagy and apoptosis. Interestingly, we discovered that proper dietary protein reduced autophagy, probably through unc-51-like kinase 1 (Ulk1), BCL-2-interacting myosin-like coiled-coil protein (Beclin1), autophagy-related gene 5 (Atg5), Atg12, microtubule-associated protein1 light chain 3 (LC3), BCL-2 interacting protein 3 (BNIP3) and autophagy receptor P62 (p62). We also found that an appropriate dietary protein inhibited nitrite-induced apoptosis via mitochondrial and death receptor pathways. In summary, our findings are the first to demonstrate that 22–25 % of dietary protein levels can play a protective role against nitrite-induced gill injury.
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•Optimal dietary protein significantly alleviated nitrite-induced stress response.•Optimal dietary protein reduced nitrite-induced tissue damage and oxidative damage.•Appropriate dietary protein suppressed nitrite-induced ER stress of fish.•Suitable dietary protein inhibited nitrite-induced autophagy and apoptosis of fish.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
The utilization of solar technology for clean energy generation has seen a dramatic increase over the past decade. Eyeing the ever-growing solar capacity and the subsequent inevitable deluge of solar ...panel wastes, the ideal approach to handle End-of-Life (EoL) solar photovoltaic (PV) panels is to recycle their materials for reuse. This present study explores an optimal recycling process with a high resource recovery efficiency on a laboratory scale, which comprises of three main steps: module delamination, acid etching and sequential electrodeposition. High recoveries of 86, 95 and 97% were achieved for silver, lead and aluminum, respectively. The acquired results are further applied in a life cycle assessment. The process was scaled up to simulate an industrial process and its human and environmental impacts were compared to those of the landfilling disposal method, with six main impact categories analyzed and described: global warming potential, human toxicity potential, freshwater ecotoxicity potential, acidification potential, eutrophication potential and ozone depletion potential. Mitigation strategies are also proposed. Lastly, economic analysis demonstrated that at a treatment capacity of 892.5 kg/h, the process is feasible with an internal revenue rate of 28.2% and a payback time of less than a year, provided the waste collection is subsidized.
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•A large majority of end-of-life PV panels are disposed to landfill.•A recycling process with delamination, etching and eletrodeposition is demonstrated.•The process achieved 86, 95 and 97% recoveries for Ag, Pb and Al respectively.•The GHG emission of recycling is five times lower than that of landfilling.•Process simulation and economic analysis prove the viability of recycling.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
This paper presents a tripartite quantum teleportation protocol that incorporates feed-forward control and environment-assisted measurement, aiming to suppress the influence of arbitrary noise with ...at least one reversible Kraus operator. In this protocol, the feed-forward control is first utilized before the decoherence channel, such that the entangled qubit is transferred to the target state, which is more robust against noise. Next, the measurement is performed on the noise environment coupled with the entangled qubit during the decoherence channel. Finally, the reversed feed-forward control and the redesigned weak measurement reversal operator are applied after the decoherence channel. This protocol can be applied to the case where both amplitude damping and phase damping noise coexist. Based on this protocol, the analytical expressions for performance metrics including the average fidelity and the success probability are further derived. Even for the heavy damping cases, the final average teleportation fidelity can reach 1, which is independent of the magnitude of decoherence and the entanglement parameters. Furthermore, we optimize the success probability without compromising fidelity, and derive the average fidelity expression of the standard tripartite teleportation protocol through the phase damping noise channel. The effectiveness of our protocol is verified by numerical simulations.
•A new tripartite quantum teleportation with feed-forward control is proposed.•Both amplitude and phase damping channels are handled simultaneously.•The proposed protocol outperforms other optimal protocols in decoherence amplitude.•With a teleportation fidelity of 1, a higher success probability is achieved.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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•VPO4 is reported as a new cathode for aqueous Zn-ion battery for the first time.•Due to in situ electrochemical oxidation process, the assembled cell exhibits the excellent ...electrochemical performance.•The detailed electrochemical oxidation process and Zn2+ storage mechanism is discussed by In-situ XRD, ex-situ TEM and XPS.•A clear electrochemical kinetics of the assembled cell was also analyzed.
Benefiting from the security and low cost, aqueous rechargeable Zn-ion batteries (ZIBs) have currently become attractive candidate devices for energy storage. However, the scarcity of appropriate materials served as cathodes is one of the major issues that hinder the development of aqueous ZIBs. VPO4 is considered as a promising cathode material for energy storage with huge potential windows and high specific capacity due to the stable structure caused by the stable PO4 polyanionic group and the various oxidation states of V element. However, due to the low valence state of V, as Zn2+ host structure, PO4 could not be effectively discharged directly. Herein, by an in situ electrochemical anodic oxidation method, we successfully improved the valence state of V and a higher valence vanadium-based compound (Zn0.11VO(PO4)•2.5H2O) was obtained. As expected, due to the increased valence state of V element and obviously reduced particle size caused the in situ electrochemical oxidation, the assembled Zn/VPO4 cells exhibits high reversible specific capacity of about 210 mA h g−1 at 50 mA g−1 and a good rates cycling stability. Furthermore, the efficient in situ electrochemical oxidation process of VPO4 cathode and the reversible Zn2+ ions insertion/extraction mechanism in the subsequent cycles have been investigated through in situ XRD diffraction, field emission scanning electron microscopy (FESEM) and ex situ XRD photoelectron spectroscopy (XPS). This work also provides a novel method to design the high performance Zn ion cathode material.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Zinc ion batteries (ZIBs), the classic aqueous batteries with high safety, are regarded as a promising energy storage system. The study on optimizing engineering of ZIBs is still quite rare. Herein, ...we take a representative ammonium vanadium bronze (NH4V4O10) for example to perform the optimizing engineering through selecting electrolytes and adjusting the proportion of conductive carbon in the electrode. As expected, the electrochemical performance of NH4V4O10 electrode after the optimizing engineering is significantly boosted. NH4V4O10-541 electrode (NH4V4O10 sample, acetylene black and poly(vinylidene fluoride) in a weight ratio of 50:40:10) can deliver a high reversible capacity of 430.0 mA h g−1 at 0.1 A g−1, a good rate capability (277.1 mA h g−1 at 10 A g−1), and an excellent cycling stability (a specific capacity of 244.8 mA h g−1 with 72.2% capacity retention after 3000 cycles at 10 A g−1), superior to the most of cathode materials for ZIBs. The optimizing engineering presented here should provide useful information to improve the electrochemical performance for ZIBs.
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•NH4V4O10 is investigated as cathode for zinc ion batteries.•There is an optimizing engineering based on cathode fabrication.•The optimized NH4V4O10 electrode exhibits excellent electrochemical performance.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Pulmonary carcinoid tumors account for up to 5% of all lung malignancies in adults, comprise 30% of all carcinoid malignancies, and are defined histologically as typical carcinoid (TC) and atypical ...carcinoid (AC) tumors. The role of specific genomic alterations in the pathogenesis of pulmonary carcinoid tumors remains poorly understood. We sought to identify genomic alterations and pathways that are deregulated in these tumors to find novel therapeutic targets for pulmonary carcinoid tumors.
We performed integrated genomic analysis of carcinoid tumors comprising whole genome and exome sequencing, mRNA expression profiling and SNP genotyping of specimens from normal lung, TC and AC, and small cell lung carcinoma (SCLC) to fully represent the lung neuroendocrine tumor spectrum.
Analysis of sequencing data found recurrent mutations in cancer genes including
, and
The mutated genes are involved in biological processes including cellular metabolism, cell division cycle, cell death, apoptosis, and immune regulation. The top most significantly mutated genes were
and
Pathway analysis of significantly mutated and cancer driver genes implicated MAPK/ERK and amyloid beta precursor protein (APP) pathways whereas analysis of CNV and gene expression data suggested deregulation of the NF-κB and MAPK/ERK pathways. The mutation signature was predominantly C>T and T>C transitions with a minor contribution of T>G transversions.
This study identified mutated genes affecting cancer relevant pathways and biological processes that could provide opportunities for developing targeted therapies for pulmonary carcinoid tumors.
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