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Copyright of Journal of the Chinese Society of Rare Earths is the property of Editorial Department of Journal of the Chinese Society of Rare Earths and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cyber Security & Data Governance is the property of Editorial Office of Information Technology & Network Security and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

High-purity quartz, famous for low impurities and high purity, has been widely used in optical fiber communication, photovoltaic, aerospace, semiconductor displayand other high-tech industries. Aluminosilicate mineral is one of the most typical gangue minerals in quartz ore, mainly including potassium, albite, mica, etc. With the existing conventional separation process, it is difficult to effectively and efficiently remove these intractable trace and micro-fine feldspar and mica. In this paper, the basic status of separation of aluminosilicate gangue minerals from high-purity quartz is described in detail, and the frontier technology of activation and separation of refractory trace and micro-fine feldspar and mica is systematically summarized. Based on the research progress of the basic theory of high-purity quartz in China in recent years, some reasonable scientific suggestions are put forward for the separation of micro-and micro-fine aluminosilicate gangue minerals in the crystal interface and inner encapsulation of high-quality quartz.

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The resistance of calcium fluoride crystals to γ-irradiation is one of the key properties for its application in space. In this paper, the effect of trace La impurities on the γ-irradiation induced color center of calcium fluoride crystals was reported. The calcium fluoride crystals with trace La impurities were studied by absorption spectroscopy and electron paramagnetic resonance (EPR). The results show that the irradiated calcium fluoride crystals produce multiple color center absorption bands, and the absorption band increases with the increase of irradiation dose and the concentration of La impurities. EPR confirms that the formation of this absorption band is caused by the F color center in the calcium fluoride crystal. The presence of La3+ affect the stability and spectral position of the F centers in calcium fluoride crystals. Possible mechanisms for the presence of La3+ and F centers in calcium fluoride crystals are proposed. [ABSTRACT FROM AUTHOR]

BACKGROUND: Previous studies indicate that mesenchymal stem cells are used for therapy of pneumoconiosis. However, related studies are still at the stage of preclinical research due to a lack of effective tracing techniques in vivo for mesenchymal stem cells. Therefore, these effective tracing techniques in vivo for stem cells are the key to solve it. OBJECTIVE: To review the research progresses of present therapy situations for pneumoconiosis, related studies on mesenchymal stem cell therapy for pneumoconiosis and different nanoparticles combined with multi-modal molecular imaging in mesenchymal stem cell therapy for pneumoconiosis, evaluate the contribution, effect and prospect of different types of nanomaterials multi-modal imaging tracking technology in the research status of mesenchymal stem cell therapy for pneumoconiosis, and analyze the present problems and future development directions. METHODS: PubMed database was searched for articles published from 2016 to 2021. Key words were “pneumoconiosis, pulmonary fibrosis, stem cells, MSCs, trace, nanoparticles, multi-modal imaging, therapy”. According to the inclusion and exclusion criteria, 60 relevant articles were finally included for review. RESULTS AND CONCLUSION: (1) Preclinical studies indicate that gold nanoparticles, magnetic nanoparticles and near-infrared-long persistent luminescence nanoparticles are innovative and ingenious in design with a series of advantages such as biocompatibility, stability, safety and capabilities of multi-modal imaging. Initial effectiveness is achieved in preclinical applications of in vivo tracking and anti-fibrosis therapeutic evaluation in the process of anti-pulmonary fibrosis treatment of mesenchymal stem cells. Meanwhile, each nanoparticle has its own advantages, for instance, long-term in vivo tracking, targeting special localization and long persistent luminescence respectively are merits of the gold nanoparticles, magnetic nanoparticles and near-infrared-long persistent luminescence nanoparticles. (2) Gold nanoparticles are the most promising nanoparticles of clinical application in the studies on the mesenchymal stem cell therapy for pneumoconiosis using nanoparticles combined with multi-modal molecular imaging, to a large extent, which promote the progress and clinical transformation in the area of mesenchymal stem cell therapy for pneumoconiosis. (3) Reliable technology of research on nanoparticles combined with multimodal molecular imaging is provided to clinical application for realizing the mesenchymal stem cell therapy for pneumoconiosis. It is of great significance for propelling the clinical transformation and application of technology of targeting therapy for pneumoconiosis. (4) In the era of precision medicine, further study and detailed exploration are needed in the future to elucidate the mechanism of mesenchymal stem cell therapy for pneumoconiosis, to solve the critical problems including enhancing the targeted accumulation of nanoparticles-labeled mesenchymal stem cells, increasing the cellular uptake, controlling sustained release efficacy, prolonging the half-life of drugs and maintaining stable blood concentration, and how to combine multi-modal molecular imaging of nanoparticles with the diagnosis-and-treatment integration of drug delivery system with versatile therapeutic functions and biodegradable and cleared in vivo characteristics. [ABSTRACT FROM AUTHOR]

Copyright of Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Multipurpose Utilization of Mineral Resources / Kuangchan Zonghe Liyong is the property of Multipurpose Utilization of Mineral Resources Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Let G be a graph on n vertices, and let A( G ) and D ( G ) denote the adjacency matrix and the degree matrix of G, respectively. Define Aα ( G )= αD ( G )+( 1 - α ) A( G ) for any real α ∈ [ 0,1 ]. The Aα-characteristic polynomial of G is the characteristic polynomial of Aα ( G ), i.e., det( xIn - Aα ( G ) ), where In is the identity matrix of size n. In this paper, we give a combinatorial expression for the fifth coefficient of the Aα-characteristic polynomial of a graph.

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The isotopic ratio of iridium is a useful tool for the identification of burn-up of nuclear fuel in nuclear industry. The key issue for precise measurement of isotopic ratios of iridium in trace amount is to improve ionization efficiency, in order to generate sufficient ion intensity and stable ion beam. Negative thermal ionization mass spectrometry (N-TIMS) is proven to be a powerful method for the analysis of nuclides with relatively high ionization potentials. In this work, a novel method was established based on N-TIMS for the precise measurement of Ir isotopes. The optimized condition was developed after comparing IrO2- ion beams under different circumstances. The ionization efficiency of 50 ng Ir could reach up to 9.8×10-4 when employing Pt single filament and Ba(OH)2 as ionization activator. The iridium isotope ratios of n(191Ir)/n(193Ir) obtained after oxygen isotopic correction agree well with the certified values in the range of the analysis error, and the external precision for 10 ng Ir sample loads is better than 0.2%, which can fulfill the requirements for applications in nuclear industry. [ABSTRACT FROM AUTHOR]

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Su Shi has a special relationship with Jiangsu. He once served as a magistrate in Xuzhou and Yangzhou, where he helped to benefit local residents; he bought land and houses in Yixing and Changzhou, and eventually passed away in Changzhou; he had a special affection to Runzhou for he cared about the families and friends living there; Su Shi had come to live in Zhenzhou many times when in difficult positions; he also passed for many a time by cities along the Grand Canal, such as Suzhou, Sizhou, Chuzhou and Gaoyou, and built connections with local scholars or those staying there. Studying the traces of Su Shi in Jiangsu and analyzing the development and research status quo of his relics can therefore not only help to interpret fully the connection between Su Shi and Jiangsu, but also provide an overview of the role of Grand Canal as a traffic hub in Song dynasty. This is of great value and significance for furthering researches related to Su Shi, the culture of Grand Canal and the culture in Jiangsu Province. [ABSTRACT FROM AUTHOR]

The method for determination of trace sodium in N36 zirconium alloy by inductively coupled plasma optical emission spectrometry is established. The influence factors are discussed, such as sample dissolution ways, plasma view, spectra lines, matrix interference, etc. The uniform experiment design is used to determine the optimum RF power, plasma gas flow, auxiliary gas flow and nebulizer gas flow. The results indicate that the zirconium matrix has interferences on the measurement. Under the optimum instrument parameters obtained by uniform experimental design, interferences were eliminated by using the matrix matching method. The relative standard deviation (RSD, n = 11) was less than 5%, and recoveries were in the range of 95%-105%. Based on the results obtained in the present work, it is concluded that the method is fast, simple and accurate, and can meet the analytical requirements for trace sodium in the N36 zirconium alloy for nuclear use. [ABSTRACT FROM AUTHOR]

This paper aims to discuss the post-structural philosopher Jacques Derrida’s philosophy of deconstruction and its implications for education. There are four main notions to be investigated: deconstruction, différance, trace and supplement. By interrogating the four notions, the author reveals four implications for education. They are as follows: 1) The deconstruction of the textual structure is to deconstruct the traditions of thought. 2) Reading the Classics in different ways is helpful to increase educational meanings. 3) Imagination about education should go beyond the conventional way of learning by means of “listening, speaking, reading and writing”. 4) Playfulness is able to replenish austerity in theorizing ways of life. The author, then, uses three examples concerning gender body politics, library and information science, and the Paul de Man event to explore the dynamics and limits of the deconstruction as a strategy of analyzing the discourse. At the end, the author concludes that the most profound significance of deconstruction lies in continuous self-questioning and self-challenging rather than serving as a tool of straightforward appropriation and application to reality affairs. Otherwise, the notion of deconstruction could lose its dynamical criticality.

The amount of the value elements in the national standard iron ore reference material is small, and there is no effective means of monitoring for determination of other elements, which limits the determination of the elements in iron ore to a certain extent. In this case, effective scientific data couldn't be provided to support modern exploration geochemistry, which restricts the development of prospecting geochemistry. In this study, the method of determining molybdenum by inductively coupled plasma mass spectrometry (ICP-MS) was established, and the optimum instrument conditions was investigated. At the same time, it was found that the interference of molybdenum mainly came from the elements of zirconium and iron. The interference degree was different for the different mass molybdenum, so the element of 95Mo which has the least interference was chosen as the measurement element. The detection limit of ntolybde-num was 0.014 pgμg/g, the recovery rate of the samples was 91%-1175%, the precision of the method was 2. 06%-5. 01%. The method is accurate and reliable, it can provide effective data support for exploration geochemistry. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the effect of different transplantation approaches of human umbilical cord menchymal stem cells (HU-MSCs) on repairing hepatic ischemia-reperfusion injury (HIRI) in rat models. Methods Forty male SD rats were randomly divided into the A (control group), B (model group), C (portal vein transplantation of MSCs group) and D (tail vein transplantation of MSCs group) groups (n=10 for each group). In the B, C and D groups, HIRI rat models were established by Pringle maneuver. MSC transplantation was not delivered in the B group, and chloromethylbenzamidodialkylcarbocyanine (CM-DiL) labeled-HU-MSCs (106) were transplanted via portal vein or tail vein in the C or D groups. Blood samples were collected for detection of the expression levels of alanine aminotransferase(ALT) and tumor necrosis factor (TNF)-α before and 1, 3 and 5 d after transplantation. At 5 d post-transplantation, all rats in each group were sacrificed. The liver tissues were prepared for hematoxylin-eosin (HE) and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling(TUNEL) staining for evaluation of liver injury. The distribution of HU-MSCs in the rat liver in each group was observed under laser confocal microscope. Results After HU-MSCs transplantation, the expression levels of ALT in the C and D groups were significantly down-regulated compared with that in the B group, and the level of ALT in the C group was significantly lower than that in the D group (all P<0.05). The expression levels of inflammatory cytokine TNF-α in the C and D groups were significantly lower than that in the B group and the TNF-α level in the C group was considerably lower than that in the D group (all P<0.05). HE staining of the liver tissue prompted that the liver injury was the most severe in the B group, and the liver injury in the C group was less severe compared with that in the D group. TUNEL staining of the liver tissue revealed that the apoptosis index (AI) in the C and D groups was significantly lower than that in the B group, and the AI in the C group was significantly lower compared with that in the D group (all P<0.05). Under laser confocal microscope, CM-DiL-labeled HU-MSCs were noted in the C and D groups after transplantation, and the quantity of HU-MSCs in the C group was significantly higher than that in the D group (all P<0.05). Conclusions Transplantation of HU-MSCs can mitigate the severity of HIRI. And transplantation via portal vein transplantation yields higher clinical efficacy compared with the tail vein route. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Liquid Crystal & Displays is the property of Chinese Journal of Liquid Crystal & Displays and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The vulnerability of published vehicle traces is a focus issue for vehicle ad hoc network. Aiming at the privacy of published traces with a game-theoretic model under the scene of the active attacks and defense actions were modeled, and the attack and defense games were analyzed. Also ability of an adversary and the goal that a defender wants to achieve by the information entropy were quantified. By the analysis of true traces, the Nash equilibrium point under the game of complete information and an optimal defense strategy providing the user with the best privacy level for each at-tack strategy were presented.

Copyright of Forensic Science & Technology is the property of Institute of Forensic Science, Ministry of Public Security and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Zhejiang University. Humanities & Social Sciences / Zhejiang Daxue Xuebao is the property of Zhejiang University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Educational Practice & Research is the property of National Taipei University of Education and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper proposed an energy-eeficient and/or user fairnees localization technology by analyzing real GPS trace of people in campuses and what was the best method for selfish mobile users to collaborate for energy-efficient localization. At the same time, it developed an optimal centralized algorithm which minimized a time average GPS power of mobile devices satisfying fixed accuracy bound and guaranteed fairness among devices by adopting the idea of coHaboration among proxy devices. Further, it also developed a distributed near-optimal algorithm by controHing the backoff time and GPS-off duration. Finally, through the extensive simulations under several topologies, it verified the high energy-eeficiency and fairnees among devices of this algorithms. [ABSTRACT FROM AUTHOR]

Internal standard method for the determination of trace impurity by internal standard substance addition to eliminate the effects of operating conditions fluctuation on the results, improves the accuracy of the analytic result. By comparing the internal standard method and area normalization method for the determination of trace impurities in paraxylene, internal standard method has the advantages of high sensitivity, small interfering effect, and low detection limit. The optimized internal standard method is more suitable for the determination of trace impurities. [ABSTRACT FROM AUTHOR]

The literary interaction of Shen Shanbao in her late life could be divided into two stages. The first stage covered her stay in Beijing with her husband; and the second stage covered her stay in Jin (Shanxi), again with her husband (before that period of time, she was visiting family in her home town in the South). When in Beijing, she was leading a relatively stable life, and her literary interaction with other literati and female poets was most active and effective. However, after moving to Jin, she seemed "off focused" because of the need to travel frequently between Bingzhou, Shuoping and Fenzhou. As the female poet followed her husband to the north region, Shen not only actively interacted with the female poets of the north but also continued to maintain a close connection with the southern female poets, establishing a link between the northern and southern female poets, and also promoting a greater degree of space and diversity for developing cultural and literal styles in the Reign of Dao-Xian (1821--1861). Essentially, this progress was closely related to social changes, reflecting the transition of the female poets from the traditional society to the modern society. [ABSTRACT FROM AUTHOR]

On optimal extension field, ECC needs characteristics p ≤ 127, and runs on complex domain. But ECC of complex domain has a biggest shortcoming which is the high cost to realize and not easy to deploy. Therefore, this paper designed a method of constructing ECC to run on the finite field extension domain. To avoid solving inverse on finite field extension domain, by the concept of blind spots and keeping away from solving inverse at blind spots, elliptic curve scalar multiplication operation carried out on integer extension domain. In addition, since ECC characteristics of the method may be greater than 2, so the use of the method is superior to optimal extension field on ECC. Numerical examples show the validity of the method and correctness. Compared with the existing research results, the method has obvious advantages. [ABSTRACT FROM AUTHOR]

This article describes a method for determination of trace thiophene in petroleum benzene using gas chromatography with sulfur chemiluminescence detector (SCD) and external standard quantification. The operating temperature of burner and gas flow rate are determined, and solutions of anti-interference are found. Compared with other detection methods, this method has the advantages of simple operation, rapid detection, high sensitivity, low detection limit, less interference, good repeatability, more accurate and reliable analysis results. [ABSTRACT FROM AUTHOR]

In recent years, the IVD industry has developed rapidly based on the increasing market demand, and plays an important role in disease prevention, clinical diagnosis, health monitoring and guiding treatment. Therefore, followed quality and safety issues are highly concerned. The unique advantages of blockchain technology, decentralization, distrust and non-tampering, can write into trusted node data in every link covering production, circulation and usage of IVD reagents, and establish a distributed ledger with full backup, which makes the anti-conterfeiting and traceability for IVD reagents possible. We discuss whole process intelligent tracing system for IVD reagents based on blockchain technology. Through the strong mechanism of pre-supervision and post-punishment, the source of reagents can be traced, quality and responsibility can be investigated, and the medical inspection quality and diagnostic safety can be guarded.

The content and occurrence of platinum group elements have a close relation with their biogeochemical behavior and ecological risk in seawater. However, the determination of the PGE content and morphology in seawater is difficult. The characterization of chelating resins for specific elements and specific ligand structures provides a potential for breakthrough in this problem. This review reported the major speciation of PGEs in seawater, discussed the adsorbing mechanism of resin, and compared the adsorption capacity of different types of chelate resin. Finally, some conclusions were drawn. First, the inorganic complexes of PGEs in seawater were mainly composed of [MCl3OH2-]/[MCl42-](M=Pt,Pd) and M(OH)33-n(n=3-6) (M=Rh); Second, chelate resins had certain recognition for different complex morphology of PGEs; Third, nitrogen-sulfur chelate resin was the ideal resin for studying PGEs in seawater under practical conditions.