Search

(1-x) (Na0. 5Bi0.5)0.94Ba0. 06(Ti0.96Zr0. 04)O3-xBi(Ni0.5Sn0.5)O3 (x=0,0. 05,0. 10,0. 15,0.20) ceramics were synthesized by solid state method. The structure, microscopic morphology, dielectric properties and energy storage properties of (1-x) NBBTZ-xBNS ceramics were systematically investigated. X-ray diffraction results revealed that the appropriate amount of BNS can perfectly dissolve with the crystal structure of NBBTZ ceramics, but excessive amount will produce the second phase pyrochlore phase (Bi2Ti2O7). Dielectric measurements exhibited a relaxor-like characteristic for the (1-x) NBBTZ-xBNS ceramics, where εm decreased with the increasing BNS content, and the Tm increased with the increasing BNS content. The dielectric breakdown strength of 290 kV/cm and a releasable energy density of 4.0 J/cm³ were achieved in the sample of x=0.15. [ABSTRACT FROM AUTHOR]

To address the problem of texture blurring and structural distortion when repairing large irregular damaged areas in existing facial image repair algorithms, due to their inability to extract dynamic features and lack of edge prior information, this paper proposed a facial image repair algorithm based on edge prior fusion and dynamic gated feature. Firstly, it designed a dynamic gated convolution module to dynamically extract features from the damaged area, linking effective features of the known and missing areas to enhance the delicacy of the texture. Then, it designed a dynamic gated edge enhancement network and a U-shaped encoding texture repair network. The edge enhancement network aimed to capture edge contour information, providing structural prior constraints for the U-shaped encoding texture repair network. The U-shaped encoder texture repair network adopted the UNet ++ to fuse multi-layer features to ensure the consistency of structure and texture in the repaired facial image. Finally, it demonstrated the effectiveness and universality of the UNet ++ through ablation experiments, and pruned U-shaped network to select the appropriate facial image model representation layer for texture reconstruction in the missing area. Experiments were carried out on the CelebA-HQ facial dataset for evaluation. The experimental results show that compared with main-stream algorithms, the proposed method improves SSIM by an average of 3.87%, PSNR by an average of 3. 79 dB, and reduces FID by an average of 16.54%, thereby more effectively repairing large areas of irregular missing regions, and generating images with clear texture and reasonable structure. [ABSTRACT FROM AUTHOR]

The experiment was to explore the preparation technology of Enterococcus faecium QW256 bacterial powder. The effect of factors such as centrifugation conditions, protective agent and compounding, and storage stability of bacterial powder on the bacterial survival rate during the preparation of Enterococcus faecium QW256 bacterial powder were investigated experimentally. The results showed that the optimal centrifugation conditions for cell collection were 6 000 g for 10 min, the suspension matrix was 1.9% sodium thiosulfate solution, and the optimal lyophilized protective agent formula was mannitol 25.38 g/L, sucrose 34.65 g/L, glycine 4.17 g/L and sodium ascorbate 1.57 g/L. Under these conditions, the lyophilized survival rate of Enterococcus faecium was above 95%. The survival rate of bacterial powder stored at 25 ℃ for 100 d was more than 85%. The study indicates that the development of the compound freeze-drying protective agent has a good protective effect on freeze-drying and storage stability of Enterococcus faecium. [ABSTRACT FROM AUTHOR]

It' s difficult to obtain labeled face data in video surveillance, although there are large public datasets or synthetic data, they are differ significantly from surveillance face data on image style. To solve this problem,in contrast to existing domain adaptation methcxls based on features or public subspace, this paper proposed a new method based on image style transfer. Specifically, the method constructed Face-CycleGAN based on CycleGAN network, on the premise of maintaining identity consistency, it could transfer the style of labeled data to make it more similar to the data in video surveillance in terms of background, illumination, skin texture, etc. Combined filter further processed transferred images as a post-process step. Finally, the method trained a face recognizer by using the transferred results to narrow the gap between the domains. Experimental results on a public dataset EK-LFH and a self-collected dataset 3DProj-Sur show that the proposed method achieves 21. 93% and 4. 77% performance improvement respectively comparing to original model, which proves the effectiveness of the proposed methcxl on domain adaption. [ABSTRACT FROM AUTHOR]

Objective To study the effect of sea cucumber peptide on mitochondrial function of skeletal muscle in exercise-induced fatigue rats. Methods Fifty male rats were divided into five groups; the control group, model group and low-dose, medium-dose, and high-dosesea cucumber peptide groups. Except for the control group, the exercise-induced fatigue rat models were established by exhaustive swimming method for weight-bearing swimming training. Rats in the low-dose, medium-dose, and high-dose sea cucumber peptide groups were administrated 300, 150, and 75 mg/kg sea cucumber peptide,respectively. The rats in the control and model groups were given the same volume of purified water. They were all treated for 28 days. At the end of study, we killed the rats to obtain the quadriceps femoris tissues, file skeletal muscle level of super oxide dismutase (SOD), malonie aldehyde (MDA) and glutathione peroxidase (GPx) were detected by spectrophotometry. Moreover, mitochondrial permeability transition pore (Pl’P), mitochondrial respiratory chain complexes I and III were determined. Die expression levels of mitochondrial peroxisome proliferator-activated receptor-γ coactivator 1-a(PGC-lα) and estrogen-related receptor (ERR) were detected using Western blotting. Results Compared with the control group, the SOD and GPx activities decreased and the MDA level increased (P <0.05 or P <0.01) ;the mitochondrial PTPopenness increased (P <0.01), the mitochondrial respiratory chain complexes I and III decreased (both P < 0.01), and the expression of mitochondrial PGC-la and ERR decreased in the model group (P <0.05 or P <0.01). Compared with the model group, SOD and GPx activities in skeletal muscle tissues increased, and MDA content decreased (P <0.05 or P < 0.01) ; the skeletal muscle mitochondrial PTP openness decreased (P < 0.01), the mitochondrial respiratory chain complexes I and III increased (P < 0.05 or P <0.01), and the expression of mitochondrial PGC-lα and ERR increased in the low-dose, medium-dose, and high-dose sea cucumber peptide groups(P < 0.05 or P <0.01). Conclusion Sea cucumber peptide ameliorates exercise-induced fatigue in rats, decreases skeletal muscle mitochondrial swelling and mitochondrial membrane permeability, enhances mitochondrial respiratory function, and up-regulates mitochondrial PGC-la and ERR expression. [ABSTRACT FROM AUTHOR]

(1-x)BaTiO3-xBi(Ni2/3Nb1/3)O3（x=3,5,7,10,15,20 mol%）（BTBNN）relaxor ferroelectric ceramics were synthesized by solid state method.The structure,dielectric properties and ferroelectric properties of BTBNN ceramics were systematically investigated.The results showed that the Bi（Ni2/3 Nb1/3）O3（BNN）addition could lower the sintering temperature of BT-based ceramics.X-ray diffraction results revealed that the crystal structure of BTBNN ceramics changed from tetragonal to pseudo-cubic perovskite structure with the increasing BNN content.Dielectric measurements exhibited a relaxor-like characteristic for the BTBNN ceramics,whereεmdecreased with the increasing BNN content,and the Tmdecreased first and then increased with increasing BNN content.The dielectric breakdown strength of250 kV/cm and a releasable energy density of 2.03 J/cm3 were achieved in the sample of x=20 mol%. [ABSTRACT FROM AUTHOR]

Timed-release encryption( TRE) is a cryptography that studies the problem of sending information into the future,it can solve many practical problems to construct a feasible and safe TRE. This paper proposed a scheme based on the research of indistinguishability obfuscation and TRE. This scheme encapsulated the sender’s encryption and receiver’s decryption by a circuit and obfuscated this circuit by an indistinguishability obfuscator. It could make great use of the time of obfuscators obfuscate circuits,simplified the scheme and improved the security of this scheme. Finally,this paper proves the correctness and security of this TRE scheme. [ABSTRACT FROM AUTHOR]

The "Structure and Mechanical Properties of the 3rd Generation Advanced High Strength Steel ( AHSS)" is taken as a project to apply for college students' innovative training project. The authors all joined the project. In the process, the authors' theoretical knowledge and basic skills were improved; the approaches and means of scientific research were extended ； several research papers have been published. With the knowledge, ability and attitude enhanced on all fronts to our teammates, it has important significance for us in the future study, research or work. Eventually we won the national excellent project, and the importance of innovative training project has been proved by the harvests and experience in the process. [ABSTRACT FROM AUTHOR]

Ouyang Xiu is not only a leader in literary circles, but also an excellent historian. His historical thoughts and historiography practice have deep influence on his creation of prose especially epitaphs. He wrote epitaphs with compiling history spirit and practical methods, demonstrating a unique feature and having a great impact on epitaph creation in later ages. [ABSTRACT FROM AUTHOR]

Alkylphenols endocrine disruptors (APs) are one of the environmental endocrine disrupting chemicals (EDCs), which are persistent toxic chemical pollutants. They have been widely concerned by the scientific community because of their non-degradable, pseudo-persistent and bio-accumulative characteristics. Traditional wastewater treatment methods cannot effectively remove APs. As a new advanced oxidation technology, photocatalysis has been widely used to treat emerging pollutants in recent years. Focusing on the most typical alkylphenol endocrine disruptors (nonylphenol and octylphenol). The research progress of traditional wide band gap photocatalysts and their composites and new narrow band gap visible light photocatalysts for APs degradation were reviewed, and the future development trend was prospected. [ABSTRACT FROM AUTHOR]

AIM: To investigate the SARS-CoV-2 papain-like protease （PLpro） mediated functional proteome changes in the interferon-α（ IFN-α）-responsive liver cells. METHODS: Three strains of monoclonal Huh7 cells that stably expressed PLpro （PLpro1~3） and their vector control cells （NC） were constructed. Through IFN-α stimulation, an IFN-α-responsive liver cell model was established. Data-independent acquisition mass spectrometry analysis, followed by bioinformatics analyses to compute potential mechanistic effects were then performed. In addition, RT-qPCR, Western blot, cytometric bead array analysis, cytotoxicity analysis and Annexin V-Alexa Fluor 647/PI cell death analyses were conducted for biological verifications. RESULTS: Remarkably increased ISGylated proteins in the IFN-α stimulated NC cells were detected. While in the IFN-α stimulated PLpro cells, the abundance of ISGylated proteins was significantly less than that of NC cells （P<0. 01）. These results suggested that PLpro cells were expressing functional PLpro, and a cellular model was successfully established. A total of 5 619 proteins were identified and quantified across all mass spectrometry analyses, including 149 differentially expressed proteins. With the upstream regulator analysis of IPA, as well as biological validations, PLpro was found to significantly activate the downstream proteins of 7 inflammatory cytokines, including IFN, IL-6, TNF, IL-1β and so on （P<0. 01）, in IFN-α-responsive liver cells. However, PLpro did not increase the protein or mRNA abundance of these cytokines （P>0. 05）. Furthermore, significantly higher level of necrotic cell death and cytotoxicity in the PLpro group （P<0. 01） were observed. CONCLUSION: In IFN-α-responsive liver cells, SARS-CoV-2 PLpro can mediate necrotic cell death, and directly up-regulate the down-stream proteins of COVID-19 associated pro-inflammatory cytokines, independent from the up-regulation of these cytokines themselves. [ABSTRACT FROM AUTHOR]

[Objective] Cytochrome P450(CYP450) is an important key enzyme in the metabolism of triterpene saponins in plants. The paper aimed to investigate the protein characteristics and phylogenetics of CYP450. [Method] From the published papers and NCBI database the sequences of CYP450 were collected. and five bioinformatics tools. including ProtParam. ORFfinder. SignalP4. 1. SOPMA. CDD and MEGA6. 0. were used to analyze the physical and chemical properties. ORFs. signal peptides. secondary structures. conserved domains and evolutionary relationships. respectively. [Result] Totally 23 sequences of CYP450 from 21 plants were collected. and those sequences showed strong consistency in gene lengths. amino acid numbers. pI and amino acid compositions. Signal peptides were only detected in Phytolacca americana. Beta vulgaris and Capsicum annuum. Furthermore. secondary structures had significant uniformity in the 23 sequences. and α-helixes and random coils took up the majority. Most of the conserved domains belonged to P450 superfamilies. The phylogenic trees revealed that the differences were not significant among CYP450 s. [Conclusion]The protein characteristics of CYP450 s have less differences among the 23 sequences. and the evolutionary differences are also close. which hint that CYP450 s have high conservation in evolution. The paper would help our understanding on the enzyme characteristics of CYP450 and triterpene saponin metabolism in plants. [ABSTRACT FROM AUTHOR]

In order to study the effect of stress and strain on electrochemical characteristics and stress corrosion behavior of hydraulic control pipeline of safety valve in thermal recovery well, high temperature and high pressure autoclave was used to simulate the thermal recovery environment of 260 °C and 1 % oxygen partial pressure, and the stress corrosion of 316L hydraulic control pipeline was characterized by SEM and EDS. The results showed that the stress and strain made the passive film of 316L hydraulic control pipeline produce microcracks, which reducing the corrosion resistance of pipeline. In the simulated environment of high temperature and high pressure thermal recovery, oxygen promoted the microcrack to become the small anode, the passive film was the large cathode, and the crack tip autocatalytic developed, which eventually led to stress corrosion cracking of 316L hydraulic control pipeline and multiple parallel circumferential cracks. [ABSTRACT FROM AUTHOR]

BACKGROUND: Quantitative analysis of ancient glass and vitreous materials has important significance for studying its production time, origin, source of raw materials and production process. Compared with traditional analysis methods (eg. EPMA, EDX-SEM), LA-ICP-MS can be used to analyze the primary, minor and trace elements in samples quickly and accurately. OBJECTIVES: To investigate the composition of archaeological glass and discriminate its sources. METHODS: The element concentration in ancient glass and vitreous materials were determined by LA-ICP-MS. The surface morphologies of pits in glasses were displayed by AFM. RESULTS: The matrix effect among NIST610 and Corning A-D was insignificant under 193nm laser system and this experimental condition. A quantification strategy based on NIST610 and normalization to 100% (w/w) was suitable for analyzing Corning A-D and ancient glass samples. Study on different ablation modes in the experiment is helpful for the establishment of different experimental conditions to meet the requirement of different studies. CONCLUSIONS: Unearthed samples were analyzed, which provided data support for the source of the product. [ABSTRACT FROM AUTHOR]

Objective: To investigate the effect of ambroxol at different doses on lung cancer patients undergoing single-port endoscopic lobectomy and lymphadenectomy during perioperative period. Methods: 124 patients with lung cancer who were admitted to our hospital from January 2017 to December 2018 were selected as subjects. The subjects were divided into low dose group (n=41), medium dose group (n=41) and high dose group (n=42) according to the random number table method according to the patients'wishes. Ambroxol was given intravenously 1d before operation, and continued 7d after operation. The changes of clinical symptoms, pulmonary function, inflammatory factors, T lymphocyte subsets before and after treatment and the incidence of adverse reactions in each group were compared. Result:The proportion of expectorants in high dose group was higher than that in low dose group, the proportion of sputum thinning was higher than that of medium dose group and low dose group (P<0.05). The first second forced respiratory volume (FEV1 ) and FEV1 /forced vital capacity (FVC) in high dose group were higher than those in medium dose group and low dose group after treatment (P<0.05). The levels of inflammatory factors after treatment in each group were higher than those before treatment, and with the increase of dose, the levels of C-reactive protein (CRP), interleukin-6 (IL-6), interleukin-8 (IL-8) decreased (P<0.05). With the increase of dose, the CD3+, CD4+, CD4+ /CD8+ values after treatment were increased, and the CD8+ value decreased (P<0.05). There was no significant difference in the incidence of adverse reactions among groups (P>0.05). Conclusion: Perioperative application of 120mg ambroxol in patients with lung cancer undergoing single-port endoscopic lobectomy and lymphadenectomy can accelerate the recovery of patients, protect their lung function, inhibit inflammation, and improve their immune function and clinical symptoms. [ABSTRACT FROM AUTHOR]