In this work,a novel Sc-doped Bi_(3)TiNbO_(9) ferroelectric nanofiber was first prepared by *** nanofibers are approximately 100 nm level in *** photocatalytic activity analysis reveals that the Bi_(3)TiNbO_(9) nanofi...
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In this work,a novel Sc-doped Bi_(3)TiNbO_(9) ferroelectric nanofiber was first prepared by *** nanofibers are approximately 100 nm level in *** photocatalytic activity analysis reveals that the Bi_(3)TiNbO_(9) nanofibers synthesized by electrospinning are superior to powders prepared by the solid-state method,which is mainly attributed to the high specific surface area and high surface activity of the *** addition,doping Sc can reduce the band gap of Bi_(3)TiNbO_(9) and further improve the photocatalytic ***_(3)TiNbO_(9) nanofibers containing 5 mol%Sc have the highest photocatalytic activity,which can degrade 98.55%of RhB under 405 nm light irradiation for 120 *** addition,the catalytic mechanism of the catalyst was obtained by scavenger tests,active species capture tests and band structure *** three cycles of photocatalytic experiment,the degradation rate is decreased by only 2.42%,proving that the nanofibers catalyst has excellent *** work provides good prospects for the practical application of electrospinning technology in the field of photocatalysis.
High-resolution observations of short-term changes in sea ice are critical to understanding ice dynamics and also provide important information used in advice to shipping,especially in the *** individual satellite sen...
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High-resolution observations of short-term changes in sea ice are critical to understanding ice dynamics and also provide important information used in advice to shipping,especially in the *** individual satellite sensors provide periodic sea ice obser-vations with spatial resolutions of tens of meters,information regarding changes that occur over short time intervals of minutes or hours is *** this study,a gridded ice-water classification dataset with a high temporal resolution was developed based on observations acquired by multiple satellite sensors in the Marginal Ice Zone(MIZ).This dataset-DynIceData-which combines Sentinel-1 Synthetic Aperture Radar(SAR)data with Gaofen-3(GF-3)SAR and SDGSAT-1 thermal infrared imagery was used to obtain observations of the MIZ with a range of temporal resolutions ran-ging from minutes to tens of *** areas of the Arctic covered include the Kara Sea,Beaufort Sea,and Greenland Sea during the period from August 2021 to August ***-oriented segmen-tation and thresholding were used to obtain the ice-water classifi-cation map from Sentinel-1 and GF-3 SAR image pairs and Sentinel-1 SAR and SDGSAT-1 thermal image *** time interval between the images in each pair ranged from 1 minute to 68 ***-kilometer grid sample granules with a spatial resolution of 25 m for the GF-3 SAR data and 30 m for the SDGSAT-1 thermal data were *** classification was verified as having an overall accuracy of at least 95.58%.The DynIceData dataset consists of 7338 samples,which could be used as reference data for further research on rapid changes in sea ice patterns at different short time scales and provide support for research on thermodynamic and dynamic models of sea ice in combination with other environmen-tal data,thus potentially improving the accuracy of sea ice forecast-ing using Artificial *** dataset can be accessed at https://***/10.57760/sciencedb.j00001.00784.
We previously showed that hydrogen sulfide(H2S)has a neuroprotective effect in the context of hypoxic ischemic brain injury in neonatal ***,the precise mechanism underlying the role of H2S in this situation remains **...
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We previously showed that hydrogen sulfide(H2S)has a neuroprotective effect in the context of hypoxic ischemic brain injury in neonatal ***,the precise mechanism underlying the role of H2S in this situation remains *** this study,we used a neonatal mouse model of hypoxic ischemic brain injury and a lipopolysaccharide-stimulated BV2 cell model and found that treatment with L-cysteine,a H2S precursor,attenuated the cerebral infarction and cerebral atrophy induced by hypoxia and ischemia and increased the expression of miR-9-5p and cystathionineβsynthase(a major H2S synthetase in the brain)in the prefrontal *** also found that an miR-9-5p inhibitor blocked the expression of cystathionineβsynthase in the prefrontal cortex in mice with brain injury caused by hypoxia and ***,miR-9-5p overexpression increased cystathionine-β-synthase and H2S expression in the injured prefrontal cortex of mice with hypoxic ischemic brain injury.L-cysteine decreased the expression of CXCL11,an miR-9-5p target gene,in the prefrontal cortex of the mouse model and in lipopolysaccharide-stimulated BV-2 cells and increased the levels of proinflammatory cytokines BNIP3,FSTL1,SOCS2 and SOCS5,while treatment with an miR-9-5p inhibitor reversed these *** findings suggest that H2S can reduce neuroinflammation in a neonatal mouse model of hypoxic ischemic brain injury through regulating the miR-9-5p/CXCL11 axis and restoringβ-synthase expression,thereby playing a role in reducing neuroinflammation in hypoxic ischemic brain injury.
Laser-induced breakdown spectroscopy(LIBS)can be used for the rapid detection of heavy metal contamination of Tegillarca granosa(***),but an appropriate classification model needs to be *** the one-class classificatio...
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Laser-induced breakdown spectroscopy(LIBS)can be used for the rapid detection of heavy metal contamination of Tegillarca granosa(***),but an appropriate classification model needs to be *** the one-class classification method,only target samples are needed in training process to achieve the recognition of abnormal samples,which is suitable for rapid identification of healthy *** from those contaminated with uncertain heavy *** construction of a one-class classification model for heavy metal detection in *** by LIBS has faced the problem of high-dimension and small *** solve this problem,a novel one-class classification method was proposed in this ***,the principal component scores and the intensity of the residual spectrum were combined as extracted ***,a one-class classifier based on Mahalanobis distance using the extracted features was constructed and its threshold was set by leave-one-out *** sensitivity,specificity and accuracy of the proposed method were reached to 1,0.9333 and 0.9667 respectively,which are superior to the previously reported methods.
The tonalite-trondhjemite-granodiorite (TTG) rocks in Sushui Complex of Zhongtiao Block can be divided into two series according to their zircon U-Pb ages and geochemical characteristics: one is subduction-related (SR...
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The tonalite-trondhjemite-granodiorite (TTG) rocks in Sushui Complex of Zhongtiao Block can be divided into two series according to their zircon U-Pb ages and geochemical characteristics: one is subduction-related (SR) and the other collision-related (CR) . The SR TTG rocks, together with other Late Archean island arc magmatism, were developed as a result of oceanic subduction between the Eastern and Western blocks in Late Archean; while the CR TTG rocks formed in a thickened crustal environment, which was responding to the collision between the Eastern and Western blocks in Paleoproterozoic. All these features support a model that the Zhongtiao Block is a part of the Trans-North China Orogen in the middle of North China Craton.
Molybdenum and tungsten components in catalysts Bu4N〔Mo（CO）5Cl〕-EtAlCl2andWCl6-Bu4Sn were immobilized respectively on *** influence of immobilization ofthe soluble catalysts on their catalytic behavior in the meta...
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Molybdenum and tungsten components in catalysts Bu4N〔Mo（CO）5Cl〕-EtAlCl2andWCl6-Bu4Sn were immobilized respectively on *** influence of immobilization ofthe soluble catalysts on their catalytic behavior in the metathesis of 1—hexene was *** has been found that polystyrene is a good supporting material among all thepolymers *** immobilized catalysts have higher stability and better selectivity incomparison with their homogeneous *** metathesis yield of 1-hexene is in-creased by fourfold with WCl6immobilized on *** reason for the increase ofstability of the immobilized catalyst is discussed.
Flexible electrodes have significant potential in fields such as healthcare and neuroscience, as they enable comprehensive recording and analysis of human electrical signals, providing deeper insights into physiologic...
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Flexible electrodes have significant potential in fields such as healthcare and neuroscience, as they enable comprehensive recording and analysis of human electrical signals, providing deeper insights into physiological conditions and the state of internal organs and tissues [1, 2]. However, commercial Ag/AgCl wet electrodes face issues such as dehydration,poor comfort, and insufficient mechanical strength, while other types of electrodes, like dry and semi-dry electrodes,also have their own limitations, including the higher contact impedance.
Bevacizumab plus erlotinib prolonged patients＇ progression-free survive （PFS） versus bevacizumab alone for the maintenance treatment of none-small cell lung cancer （NSCLC） in phase III clinical trial ATLAS （Clin...
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Bevacizumab plus erlotinib prolonged patients＇ progression-free survive （PFS） versus bevacizumab alone for the maintenance treatment of none-small cell lung cancer （NSCLC） in phase III clinical trial ATLAS （ClinicalTrials. gov identifier NCT00257608）, which repealed a benefit outcome and acceptable side-effects, but whether its cost performance would be accepted by patients is blurry. The aim of our research is to figure out which strategy is the best option in clinic and would spread broadly. Markov Model was used to calculate incremental cost-utility radios （ICURs） and 10-year quality-adjusted life years （QALY） of both strategies. The clinical data were collected from phase III clinical trial ATLAS （ClinicalTrials. gov identifier NCT00257608）. The cost data were obtained from Chinese health care system. In the research, one-way sensitivity analysis, probabilistic sensitivity analysis （PSA） and Monte-Carlo analysis were performed to test the stability of the results. The better strategy was bevacizumab alone strategy, and the cumulative costs of both strategies were $178 648.47 and $46 445.28, respectively, and the QALY was 12.506 and 10.643, respectively. The ICUR of combined application was $70 962.53/QALY, which was much higher than 3 times of mean gross domestic product （GDP） in China, suggesting that this strategy was no economical at all. In one-way analysis, the change of willingness-to-pay could not influence the consequence. In addition, in Monte-Carlo analysis, the probability distribution of cost, effectiveness and ICUR was in normal distribution. Taken together, bevacizumab alone strategy was the better strategy in terms of cost-effectiveness.
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