Single magnetic atoms absorbed on an atomically thin layer represent the ultimate limit of bit miniaturization for data storage. To approach the limit, a critical step is to find an appropriate ...material system with high chemical stability and large magnetic anisotropic energy. Here, on the basis of first-principles calculations and the spin-orbit coupling theory, it is elucidated that the transition-metal Mn and Fe atoms absorbed on disulfur vacancies of MoS2 monolayers are very promising candidates. It is analysed that these absorption systems are of not only high chemical stabilities but also much enhanced magnetic anisotropies and particularly the easy magnetization axis is changed from the in-plane one for Mn to the out-of-plane one for Fe by a symmetry-lowering Jahn-Teller distortion. The results point out a promising direction to achieve the ultimate goal of single adatomic magnets with utilizing the defective atomically thin layers.
Replicating the architecture of natural nacre has become an important approach for enhancing the damage tolerance of man-made materials. Nevertheless, this is principally limited to systems composed ...of chemically different constituents and demonstrates a difficulty in realizing structural hierarchy at multiple length-scales. Here a proof of concept is presented about the implementation of bioinspired nacre-like designs in a hybrid composite of pure carbon comprising its two basic allotropic forms, i.e., natural graphite flakes and amorphous carbon from the carbonization of organics. Multiscale micro/nano-architectures with three levels of hierarchy were constructed in the composite based on the preferential alignment of graphite flakes using bidirectional freeze casting method. The composite exhibited a remarkable mechanical efficiency, specifically featured by good damage tolerance with rising R-curve behavior, owing to the activation of hierarchical toughening mechanisms at micro to nano length-scales. This verifies the potency of nacre-inspired designs for generating enhanced fracture toughness in carbon systems, even using simple raw materials, which is significant for promoting their structural applications.
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To observe the clinical effect of a combination of traditional Chinese and western medicine (sacral canal therapy combined with compound Fufang Wulingzhi Tangjiang) in the treatment of residual root ...pain after lumbar surgery.
From January 2019 to December 2020, 538 patients with residual root pain due to lumbar degenerative diseases were treated in our hospital open decompression discectomy (ODD), Percutaneous Endoscopic Lumbar Discectomy (PELD) or Transforminal Lumbar Interbody Fusion (TLIF). They were randomly divided into control group (basic treatment + celecoxib), observation group 1 (basic treatment + compound Fufang Wulingzhi Tangjiang), observation group 2 (basic treatment + sacral canal therapy) and observation group 3 (basic treatment + sacral canal therapy + Fufang Wulingzhi Tangjiang). Follow-up 3-12 months. The therapeutic effect, VAS score, JOA score, treatment cost, complications, serum interleukin-6 (IL-6), interleukin-1 (IL-1) and tumor necrosis factor-a (TNF-α) were recorded and compared before treatment, 1 week after treatment, 2 weeks after treatment, 1 month after treatment, and the last follow-up.
The treatment effect, VAS score, JOA, and treatment cost in the observation group were better than those in the control group (p < 0.05). There were significant differences in the above-mentioned indexes between the observation group 3 and the control group, observation group 1, and observation group 2 (p < 0 01). Inflammatory factors (IL-6, IL1, TNF-α) in the observation group were lower than those in the control group (p < 0 05). Inflammatory factors in observation group 3 were significantly lower than those in the control group, observation group 1, and observation group 2 (p < 0 01).
Sacral canal injection combined with Fufang Wulingzhi Tangjiang can be effective in the treatment of postoperative root pain of lumbar degenerative diseases, which can reduce inflammatory factors such as IL-6, IL-1β and TNF-α. It has the advantages of quick effect, short treatment time, low cost, high safety, in line with the concept of ERAS, easily accepted by patients and their families, and worthy of further popularizing and applying in clinic.
Component based software development (CBSD) is well acknowledged as a methodology which establishes reusability of software and reduce development cost effectively. While developing enterprise ...application using component based software engineering (CBSE) methods, software component selection plays a very important role in the process of component retrieval, adaptation and assembly. However, most of current researches focus on technical aspects from domain engineering and application engineering to improve reusability and system efficiency rather than application of optimization methods in CBSD management, especially application in component selection. Moreover, few existing researches have concerned about the situation where a software developer or enterprise develops multi-applications at the same time. By introducing the concept of reusability and a new formulation of compatibility matrix, an optimization model is proposed to solve component selection problem considering reusability and compatibility simultaneously. The model can be used to assist software developers in selecting software components when multi-applications are undertaken concurrently. Four experiments are conducted with the purpose to provide some insights in management perspective.
•Mesoporous NiO nanowall arrays are prepared by a hydrothermal method.•Mesoporous structure is favorable for fast ion/electron transfer.•Mesoporous NiO nanowall arrays show fast switching speed and ...high color contrast.
Mesoporous NiO nanowall arrays are prepared by a facile hydrothermal synthesis method in combination with a following annealing process. The as-prepared NiO nanowalls have average diameters of ∼10nm and composed of interconnected nanoparticles ranging from 5 to 30nm. The NiO nanowall arrays show a hierarchical porous structure from mesopores of 5–20nm to macropores of 30–200nm. The electrochromic performances of the NiO nanowall arrays are characterized by means of UV–vis spectroscopy and cyclic voltammetry (CV) measurements. The mesoporous NiO nanowall arrays exhibit much better electrochromic performance with faster switching speed and higher color contrast than the dense NiO film. The mesoporous NiO nanowall arrays show a transmittance variation with 77% at 550nm, and the coloration and bleaching times are 2s and 2.5s, respectively. The improved electrochromic performances are due to the porous morphological characteristics, which provide fast ion and electron transfer resulting in fast reaction kinetics and high color contrast.
The fish-borne clonorchiasis caused by the oriental liver fluke Clonorchis sinensis is endemic in a number of countries with over 35 million people being infected globally. Rapid and accurate ...detection of C. sinensis in its intermediate host fish is important for the control and prevention of clonorchiasis in areas where the disease is endemic. In the present study, we established a loop-mediated isothermal amplification (LAMP) approach for the sensitive and rapid detection of C. sinensis metacercariae in fish. The specificity and sensitivity of primers designed from the C. sinensis cathepsins B3 gene were evaluated, and specific amplification products were obtained with C. sinensis, while no amplification products were detected with DNA of related trematodes, demonstrating the specificity of the assay. The LAMP assay was proved to be 100 times more sensitive than a conventional polymerase chain reaction for detection of C. sinensis. The established LAMP assay provides a useful tool for the rapid and sensitive detection of C. sinensis in fish, which has important implications for the effective control of human clonorchiasis.
The wettability of brazing alloy on graphite surface is a key factor affecting the successful brazing of graphite to metals. By introducing active Cr, the traditional Sn0.3Ag0.7Cu brazing alloy can ...wet the graphite effectively. The design of active Cr introduction into SnAgCu alloy caused a significant decrease in contact angle, and the contact angle was decreased from 120° to 20° with the increasing content of active Cr. The influence of active Cr content on the wettability of SnAgCu/graphite system was investigated by sessile drop way at elevating and isothermal process in this work. Cr
3
C
2
reaction layer formed at the interface of liquid alloy and graphite substrate, which enhanced the spreading of liquid brazing alloy and then decreased the contact angle. The thickness of Cr–C reaction layer kept identical of 2.5 μm with the further increasing content of active Cr. Finally, the wetting mechanism of SnAgCu–Cr/graphite system was proposed.
Ba(ZrxTi1-x)O3 (BZT, 0 < = x < = 0.12, step = 0.02) ceramics have been prepared by the solid solution reaction method. The Curie temperature decreased nonlinearly from 131 to 74 deg C with increases ...x from 0 to 0.12 in BZT ceramics. While the diffusion factor increase from 1.06 to 1.64 with increases x from 0 to 0.12, implying a composition-induced diffuse transition. The phase transition temperature of tetragonality to orthorhombic structure (To-t) increases with increasing of Zr content, forming a pinched phase transition.
Solvothermal synthesis is an important technology for the preparation of nanowires at low temperature. Nanowires can grow as long as 100 μm with the aid of polymer matrix, and under the pressure ...generated by solvothermal reactions, the as‐prepared nanowires are well crystallized. For water‐sensitive reactions, solvothermal reactions can fully avoid the presence of water. We discuss here the synthesis of a variety of nanowire structures, including CdS–CdSe core–sheath nanowires and very long CdS nanowires, and the solvothermal closure of PbS nanowires. Now that an appropriate procedure has been established, the solvothermal reactions are efficient and time‐saving.
The preparation of nanowires as long as 100 μm at low temperature is possible using solvothermal synthesis. Under the pressure generated by solvothermal reactions, the as‐prepared nanowires are well crystallized. A variety of nanowire structures, including CdS–CdSe core–sheath nanowires and very long CdS nanowires, as well as the solvothermal closure of PbS nanowires, are discussed.
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