Showing papers by "Xuzhou Institute of Technology published in 2019"
TL;DR: The reusability of activated hydrochar as a VOC sorbent was tested on H3PO4 activated hickory hydrochar (HHP), which had higher acetone and cyclohexane adsorption capacities.
132 citations
TL;DR: In this article, microhardness, wear properties and microstructure of Fe-based coatings with various WC contents on H13 hot-working die steel by laser cladding were investigated.
Abstract: Microhardness, wear properties and microstructure of Fe-based coatings with various WC contents on H13 hot-working die steel by laser cladding were investigated. Special attention was paid to the effects of various WC contents on the microstructural characterization and wear properties of different coatings by means of optical microscopy (OM) and scanning electron microscopy (SEM). Results indicated that only a small part of the periphery of the WC in the WC-added coatings was melted, and the un-melted WC particles in the coatings acted as a hard reinforcement. Besides, the microhardness in the cladding layer increased with the increment of the mass fraction of WC particles, and presented a gradient distribution along in-depth direction of the coatings. Furthermore, the Fe-based clad coating with WC particles exhibited a higher wear resistance and a lower friction coefficient compared with the substrate and Fe-based clad coating. In addition, the influence mechanism of WC particles on microstructural evolution and wear resistance was also discussed.
120 citations
TL;DR: In this article, a novel class of cost-efficient electrocatalysts for oxygen evolution reaction (OER), employing carbon dots (CDs), is reported, benefiting from the successful incorporation of CDs into MnO2 nanoflowers, the resultant CDs-MnO2 with high surface areas, enhanced conductivity, as well as fast charge transfer pathways display not only greatly promoted EC activity but also high stability for OER.
91 citations
TL;DR: In this article, the performance of Ni-based catalyst is closely related to the properties of support and the Ni/SiO2 and Ni/Al2O3 catalysts are rather different in their DRM performance.
62 citations
TL;DR: In this article, the mechanical behavior of commercially pure titanium (CP-Ti) sheets under uniaxial and reverse loadings along various in-plane directions is investigated by crystal plasticity modeling together with experiments.
52 citations
TL;DR: In this paper, a simple one-step hydrothermal method to regulate the interlayer space of NiMn-LDHs by keeping urea smaller number moles than the stoichiometric ratios and the reaction time controlling was developed for the first time.
47 citations
TL;DR: In this article, a spherical-plate-like (CuMn-Co) nanosized particles structure was designed and successfully performed in ethanol and higher alcohols (HA) production via heterogeneous CO hydrogenation.
43 citations
TL;DR: Although transition metal materials are extensively studied for hydrogen evolution reaction (HER) because of their intrinsic electrochemical properties, their practical applications have been hinde... as mentioned in this paper, their practical application has been hind
Abstract: Although transition metal materials are extensively studied for hydrogen evolution reaction (HER) because of their intrinsic electrochemical properties, their practical applications have been hinde...
36 citations
13 May 2019
TL;DR: In this paper, the sorption potential and mechanisms of tetracycline (TC) on pristine and H2O2-modified biochars, including rape stings, were determined.
Abstract: To determine the sorption potential and mechanisms of tetracycline (TC) on pristine and H2O2-modified biochars, rape stalk biochars were produced and modified by H2O2. The specific surface area and...
30 citations
TL;DR: The first [4 + 2] cyclization of para-quinone methide (p-QM) derivatives with allenes has been established via phosphine catalysis, which afforded a series of chroman derivatives in high yields and excellent E/Z-selectivities.
Abstract: The first [4 + 2] cyclization of para-quinone methide (p-QM) derivatives with allenes has been established via phosphine catalysis, which afforded a series of chroman derivatives in high yields (up to 97%) and excellent (E/Z)-selectivities (all >95 : 5 E/Z). This reaction will not only enrich the research contents of cyclization reactions involving p-QM derivatives, but also provide a good example of the application of allenes and phosphine catalysis in cyclization reactions. In addition, this approach also offers a useful method for the construction of chroman scaffolds.
26 citations
TL;DR: Results hint that TOP-2 could alleviate PM2.5-induced lung injury in mice via its antioxidant and anti-inflammatory activities, and the underlying mechanisms depended on activation of the Nrf2/HO-1 pathway and inhibition of NLRP3 inflammasome.
Abstract: This paper examined the molecular conformation of Trametes orientalis polysaccharide (TOP-2) and evaluated the ameliorative effects of TOP-2 on PM2.5-induced lung injury in mice. The Congo red test and transmission electron microscopy (TEM) showed that TOP-2 had a triple-helical structure. PM2.5-induced pulmonary edema was ameliorated by TOP-2 intervention. PM2.5 notably increased the number of inflammatory cells and percentages of neutrophils in bronchoalveolar lavage fluid (BALF), and notably reduced the percentages of macrophages in BALF, while TOP-2 abolished these effects. The increased levels of total protein, albumin, C-reactive protein (CRP), myeloperoxidase (MPO), lactate dehydrogenase (LDH), alkaline phosphatase (AKP), acid sphingomyelinase (ASM), TNF-α, IL-1β and IL-6 in BALF after PM2.5 exposure were inhibited by TOP-2. In addition, TOP-2 could not only remarkably promote the activities of antioxidant enzymes, but also reduce the levels of malondialdehyde (MDA), protein carbonyl group (PCG) and 8-hydroxy-2'-deoxyguanosine (8-OHdG). Furthermore, TOP-2 up-regulated the expressions of nuclear factor-erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) and inhibited the activation of NLR family pyrin domain-containing 3 (NLRP3) inflammasome in the lung tissue. These results hint that TOP-2 could alleviate PM2.5-induced lung injury in mice via its antioxidant and anti-inflammatory activities, and the underlying mechanisms, at least partly, depended on activation of the Nrf2/HO-1 pathway and inhibition of NLRP3 inflammasome.
TL;DR: In this paper, a series of bismuth-rich Bi4O5BrxI2−x solid solution photocatalysts were prepared through a one-step solvothermal method by adjusting the molar ratio of Br/I, which can effectively degrade organic pollutants of phenol and Rhodamine B.
TL;DR: The algorithm simulation method based on the redevelopment of Unity3d is validated, showing that it is feasible, efficient, and flexible for real-time, three-dimensional, and visual navigation algorithms.
Abstract: Computer simulation is an effective means for the research of robot navigation algorithms. In order to implement real-time, three-dimensional, and visual navigation algorithm simulation, a method of algorithm simulation based on secondary development of Unity3D is proposed. With this method, a virtual robot prototype can be created quickly with the imported 3D robot model, virtual joints, and virtual sensors, and then the navigation simulation can be carried out using the virtual prototype with the algorithm script in the virtual environment. Firstly, the scripts of the virtual revolute joint, virtual LiDAR sensors, and terrain environment are written. Secondly, the A* algorithm is improved for navigation in unknown 3D space. Thirdly, taking the Mecanum wheel mobile robot as an example, the 3D robot model is imported into Unity3D, and the virtual joint, sensor, and navigation algorithm scripts are added to the model. Then, the navigation is simulated in static and dynamic environments using a virtual prototype. Finally, the navigation tests of the physical robot are carried out in the physical environment, and the test trajectory is compared with the simulation trajectory. The simulation and test results validate the algorithm simulation method based on the redevelopment of Unity3d, showing that it is feasible, efficient, and flexible.
TL;DR: This work aims to construct exact and explicit solutions to a generalized Bogoyavlensky-Konopelchenko equation through the Maple computer algebra system, using a Hirota bilinear form for the considered nonlinear equation.
Abstract: We aim to construct exact and explicit solutions to a generalized Bogoyavlensky-Konopelchenko equation through the Maple computer algebra system. The considered nonlinear equation is transformed into a Hirota bilinear form, and symbolic computations are made for solving both the nonlinear equation and the corresponding bilinear equation. A few classes of exact and explicit solutions are generated from different ansatze on solution forms, including traveling wave solutions, two-wave solutions, and polynomial solutions.
TL;DR: In this paper, a hierarchical bundle-like and holey nanosheets as noble-metal-free catalysts were first synthesized through a facile hydrothermal method, and the optimal Co1Ni0.5Se can display outstanding oxygen evolution reaction (OER) activity with the small Tafel slope of 48mV dec−1 and low overpotential of 250mV (at 10mV).
TL;DR: This paper proposed the IMKPse model that utilized general PseAAC as the classification features and employed flexible neural tree as classification model and demonstrated that the proposed algorithm has superior performances than other approaches.
Abstract: Currently, lysine malonylation is treated as one of the most key protein post translational modification in the field of biology and lysine plays a significant role for the regulation of several biological processions. Therefore, accurately identification such modification type will make contributions to understanding their biological processions in this field. The experimental approaches to identify such type of modification sites are time-wasting and laborious in some degree. So, it is necessary and urgent to design and propose computational biology approaches to identify these sites. In this paper, we proposed the IMKPse model that utilized general PseAAC as the classification features and employed flexible neural tree as classification model. In order to deal with the overfitting problem, we utilized the independent datasets of each species. More specifically, such algorithm initially employed amino acid properties from the general PseAAC as the candidate features. With the comparison of candidate features, such a method has the ability to finding out the top five features among them. When evaluated on three data sets in testing set, IMKPse obtained MCC value of 0.9185, 0.9097, and 0.9525 in three species, including E.coli, M.musculus, and H.sapiens, respectively. Meanwhile, IMKPse obtained MCC value of 0.9149, 0.9060, and 0.9467, respectively, in the independent sets. In addition, then, we make some combinations among the top five features. The results demonstrate that the proposed algorithm has superior performances than other approaches. A user-friendly web resource of IMKPSE is available at http://121.250.173.184 .
TL;DR: A new deep learning model based on an improved LeNet-5 model of convolutional neural network and does not require the extraction of the diseased tissue to reduce the recurrence of meningioma is presented.
Abstract: Meningioma is the second most commonly encountered tumor type in the brain. There are three grades of meningioma by the standards of the World Health Organization. Preoperative grade prediction of meningioma is extraordinarily important for clinical treatment planning and prognosis evaluation. In this paper, we present a new deep learning model for assisting automatic prediction of meningioma grades to reduce the recurrence of meningioma. Our model is based on an improved LeNet-5 model of convolutional neural network (CNN) and does not require the extraction of the diseased tissue, which can greatly enhance the efficiency. To address the issue of insufficient and unbalanced clinical data of meningioma images, we use an oversampling technique which allows us to considerably improve the accuracy of classification. Experiments on large clinical datasets show that our model can achieve quite high accuracy (i.e., as high as 83.33%) for the classification of meningioma images.
TL;DR: The findings suggest that TOP-2 might be useful for alleviating the alcohol-induced hepatotoxicity via its antioxidant and anti-inflammatory potential.
Abstract: Ultrasonic-microwave assisted extraction (UMAE) of Trametes orientalis polysaccharides was optimized by response surface methodology. Hepatoprotective effects of a purified T. orientalis polysaccharide (TOP-2) were evaluated by alcohol-induced liver injury model mice. The optimal UMAE parameters were indicated as below: ratio of water to raw material 28 mL/g, microwave power 114 W, extraction time 11 min. The polysaccharides yield was 7.52 ± 0.12%, which was well consistent with the predicted value of 7.54%. Pre-treatment with TOP-2 effectively increased the liver index and spleen index in alcohol-treated mice. The elevated serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels of mice after alcohol exposure were inhibited by TOP-2 administration. The liver tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) levels have decreased significantly as a result of alcohol exposure, while pre-treatment with TOP-2 could mitigate these consequences. Furthermore, pre-treatment with TOP-2 could efficiently boost the superoxidase dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities, and observably constrain the malondialdehyde (MDA) level. The findings suggest that TOP-2 might be useful for alleviating the alcohol-induced hepatotoxicity via its antioxidant and anti-inflammatory potential.
TL;DR: Although no milR4 or milR16 target genes were identified, differential expression of many different genes involved in mycelium growth and sexual development (mating process, mating signaling, and fruiting body development) among these mutants were found, indicating that milRNAs play vital roles in sexual development in C. militaris.
Abstract: Cordyceps militaris readily performs sexual reproduction, thus providing a remarkably rich model for understanding the processes involved in sexual development. It could regulate expression of human genes by diet-derived miRNA-like RNAs (milRNAs). However, the study of miRNAs in C. militaris has been limited. In the present study, genes encoding Dicers, Argonautes, and RNA-dependent RNA polymerases were identified. Illumina deep sequencing was performed to characterize the milRNAs in C. militaris at asexual and sexual development stages. Total 38 milRNAs were identified and five milRNAs were validated by northern blot and qRT-PCR, out of which, 19 were specific for sexual development. Importantly, the fungi could not form fruiting bodies after disruption of milR4, while the perithecium was formed in advance after over-expression of milR4. Abnormal pale yellow fruiting body primordium, covered with abnormal primordium, was formed in the strain with miR16 disruption. Although no milR4 or milR16 target genes were identified, differential expression of many different genes involved in mycelium growth and sexual development (mating process, mating signaling, and fruiting body development) among these mutants were found. Overall, milRNAs play vital roles in sexual development in C. militaris.
TL;DR: The obtained structures of one microlens partially covered by a droplet can be produced in arrays over a large scale, serving as templates for fabricating transparent polymer double-microlens arrays for improved light emission from the optoelectronic device.
Abstract: Microlens arrays are key elements for light management in optoelectronic devices. The recent advancement in the wearable intelligent electronics has driven the development of flexible microlenses. In this work, we show a controllable and scalable surface-droplet-based strategy to create unconventional flexible polymer microlens arrays. The technique is underpinned by the morphological transition of femtoliter liquid on the surface of a microlens surrounded by a planar area. We found that the droplet liquid wetted the rim of the microlens first and gradually moved upward to the microlens surface with an increase in the liquid volume. The morphology evolution of the droplet is in good agreement with the predication from our simulations based on the interfacial energy minimization under the condition of the pinned boundary. The shape of the droplet on the microlens is well controlled by the droplet volume, aspect ratio of the microlens, and the interfacial energy of the droplets on the microlens. As a result, the obtained structures of one microlens partially covered by a droplet can be produced in arrays over a large scale, serving as templates for fabricating transparent polymer double microlens arrays for improved light emission from the optoelectronic device.
TL;DR: Some sufficient conditions for the asymptotic stability in distribution of stochastic systems with semi-Markovian switching are established and those conditions are employed to design the state-feedback controllers in terms of linear matrix inequalities.
Abstract: This paper investigates the asymptotic stability in distribution of stochastic systems with semi-Markovian switching whose transition rates are time varying, which are more general than stochastic ...
TL;DR: The results demonstrate that the proposed model have well performance at the sensitivity, specificity, F1 score and Matthews correlation coefficient (MCC) value in the identification modification with the approach of the selected features and algorithm combination.
TL;DR: Tunable plasmon-induced transparency (PIT) effect is studied in a PLASmonic device on the basis of the metal-insulator-metal (MIM) structure which consists of trapezoid and hexagonal cavities as mentioned in this paper.
Abstract: Tunable plasmon-induced transparency (PIT) effect is studied in a plasmonic device on the basis of the metal-insulator-metal (MIM) structure which consists of trapezoid and hexagonal cavities The transmission characteristics are numerically studied in detail by the finite element method (FEM) Diverse geometrical parameters were altered to evaluate the characteristics of the structure, and the coupled mode theory (CMT) is utilized to verify the simulation results The sensing characteristics of the device could also be analyzed by the simulative results which achieved from the transmission spectra The structure we proposed has the capacity and potential to be utilized on integrated optical circuit field
TL;DR: This work suggests a targeted sustained release DDS for effective chemotherapy and enlightens, through a delicate design at the molecular scale, the brilliance of multifunctional PPE-based nanomaterials towards versatile bio-applications.
Abstract: Poly(phosphoester)-based biomaterials have great potential in drug delivery systems (DDSs) because of their multifunctional adjustability, stealth effect, excellent biodegradability, and biocompatibility. To further increase the drug loading efficiency (DLE) and sustained release ability, a multi-arm block copolymer, poly(amido amine)-b-poly(2-butenyl phospholane)-b-poly(2-methoxy phospholane) conjugated with folic acid (abbreviated as PAMAM–PBEP–PMP–FA), was designed and prepared. Compared to the traditional linear copolymers, this multi-arm phosphoester block copolymer integrates a balanced combination of unique features. As an advanced DDS, the PAMAM–PBEP–PMP–FA based supramolecular micelle provides good architectural stability, low protein adsorption, extremely high DLE, and sustained drug release for chemotherapy and abundant surface chemistry for target engineering. Benefitting from these novel functions, the supramolecular micellar drug delivery system exhibits great performances both in in vitro and in vivo evaluations. Doxorubicin (DOX)-loaded supramolecular micelles PAMAM–PBEP–PMP–FA/DOX are fast taken up by HepG2 cells and inhibit the tumor growth effectively in HepG2-tumor-bearing nude mice without obvious system toxicity. This work not only suggests a targeted sustained release DDS for effective chemotherapy but also enlightens, through a delicate design at the molecular scale, the brilliance of multifunctional PPE-based nanomaterials towards versatile bio-applications.
TL;DR: In this article, a facile one-pot hydrothermal method that using urea as pH regulator is demonstrated to engineer nanobundle-like CoNi layered double hydroxides (CoNi LDHs) with high surface areas and rich oxygen vacancies.
Abstract: Electrochemical water splitting is a promising approach for the production of H2 fuel while greatly limited by the sluggish anodic oxygen evolution reaction (OER). In this regard, searching for a highly efficient and durable OER catalyst with low cost, abundant active sites, and excellent durability is increasingly demanded. Herein, a facile one-pot hydrothermal method that using urea as pH regulator is demonstrated to engineer nanobundle-like CoNi layered double hydroxides (CoNi LDHs) with high surface areas and rich oxygen vacancies. As a result, by virtue of the nanobundle-like structure, abundant oxygen vacancies, as well as the modified electronic structures, the optimized Co1Ni0.3 LDHs can deliver the current density of 10 mA/cm2 with the overpotentials of only 266 mV, much superior than those of Ir/C, Co(OH)2, and Ni(OH)2 catalysts. More importantly, the resultant Co1Ni0.3 LDHs also possesses excellent stability catalytic activity without negligible activity decay for at least 22 h. Our work not only establishes a potential OER electrocatalyst, but also open up a new avenue for the design and development of highly active electrocatalysts with controlled shapes.
TL;DR: The prevalence, genotypes, heavy metal resistance and antimicrobial susceptibility of 997 presumptive strains of Vibrio parahaemolyticus, a Gram-negative bacterium that causes gastrointestinal illness in humans, isolated from four species of aquaculture shrimp in Jiangsu, China are determined.
Abstract: The development of multidrug- and toxin-resistant bacteria as a result of increasing industrialization and sustained and intense antimicrobial use in aquaculture results in human health problems through increased incidence of food-borne illnesses. Integrative and conjugative elements (ICEs) are self-transmissible mobile genetic elements that allow bacteria to acquire complex new traits through horizontal gene transfer and encode a wide variety of genetic information, including resistance to antibiotics and heavy metals; however, there is a lack of studies of ICEs of environmental origin in Asia. Here, we determined the prevalence, genotypes, heavy metal resistance and antimicrobial susceptibility of 997 presumptive strains of Vibrio parahaemolyticus (tlh+, tdh-), a Gram-negative bacterium that causes gastrointestinal illness in humans, isolated from four species of aquaculture shrimp in Jiangsu, China. We found that 59 of the 997 isolates (5.9%) were ICE-positive, and of these, 9 isolates tested positive for all resistance genes. BLAST analysis showed that similarity for the eight strains to V. parahaemolyticus was 99%. Tracing the V. parahaemolyticus genotypes, showed no significant relevance of genotype among the antimicrobial resistance strains bearing the ICEs or not. Thus, in aquaculture, ICEs are not the major transmission mediators of resistance to antibiotics or heavy metals. We suggest future research to elucidate mechanisms that drive transmission of resistance determinants in V. parahaemolyticus.
TL;DR: In this article, a facile one-pot method was developed to construct a unique class of N-doped graphene supported three-dimensional (3D) PdAg nanoflowers catalysts under the room temperature.
TL;DR: The preliminary biological evaluation revealed that this new class of diarylindol-6-ylmethanes exhibited strong cytotoxicity to HeLa cell lines, which serves as a good example for the direct catalytic C6-functionalization of indoles, which have been rarely investigated.
Abstract: An organocatalytic chemo- and regioselective C6-functionalization of 2,3-disubstituted indoles has been established via a reaction with ortho-hydroxybenzyl alcohols, which afforded biologically important diarylindol-6-ylmethanes in overall high yields (up to 99% yield). This protocol not only provides an efficient method for constructing biologically important diarylindol-6-ylmethane frameworks in an atom economical fashion, but also serves as a good example for the direct catalytic C6-functionalization of indoles, which have been rarely investigated. More importantly, the preliminary biological evaluation revealed that this new class of diarylindol-6-ylmethanes exhibited strong cytotoxicity to HeLa cell lines.
TL;DR: An adaptive energy-aware scheduling method called ASSD is proposed, that is based on the Dynamic Voltage and Frequency Scaling (DVFS) model of computing resources and the speedup of tasks under different parallelisms, that significantly reduces the average energy consumption.
TL;DR: In this paper, the authors estimate the inter-and intra-sectoral carbon linkage impacts of the mining sector across ten major economies by applying an input-output model, and the hypothetical extraction method and its modified version.
Abstract: Mining is among the oldest industries. It is the primary source of raw materials for most of the sectors. Little is known about the complex inter-sectoral carbon linkages of the mining industry. In this work, we estimate the inter- and intra-sectoral carbon linkage impacts of the mining sector across ten major economies by applying an input-output model, and the hypothetical extraction method and its modified version. The hypothetical extraction method removes an industrial block from an economic system, and afterwards, it makes a comparison between the before and after removal values. China with 195.47 Mt has the highest mining emissions, followed by USA, India, and Canada with 110.99 Mt, 108.79 Mt, and 76.92 Mt, respectively. The India’s mining sector with 26.33 t/104 $ is the most carbon-intensive, followed by Japan and Canada with 6.84 t/104 $ and 5.22 t/104 $, respectively. China’s carbon emissions with -11.56% and -11.28%, respectively, have been affected the most by the total extraction of mining sector and forward carbon linkages, while for the backward carbon linkage, Canada with -1.33% has been affected the most. Canada has the highest mixed and internal emissions of 0.42 Mt and 47.88 Mt, respectively. However, China has the highest net-backward and net-forward emissions of 16.91 Mt and 189.22 Mt, respectively. For all nations, the mining sector is a net exporter of emissions to other industries. Based on the numerical findings, in this work, we discuss the mitigation measures for both the direct and indirect mining emissions.