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The performance of supercapacitor degenerates at low temperature, even fails to work sometimes. Solar photothermal conversion provides a new direction for the performance improvement of supercapacitor. Manganese dioxide (MnO2) has a high specific capacity, while it should be compounded with other active materials due to its low electric conductivity. Therefore, this study aimed to improve the performance of MnO2-based supercapacitor using the photothermal effect of polypyrrole (PPy), which exhibited excellent light absorption ability and pseudocapacitance property. MnO2 and PPy were successively deposited on slow filter paper by wet chemistry method and low-temperature interfacial polymerization approach, and PPy/MnO2 paper-based composites with different PPy contents were prepared. The structures and properties of the composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, cyclic voltammetry, galvanostatic charge/discharge, and AC impedance spectroscopy. The results showed that the porous structure of filter paper was well preserved after PPy deposition, and MnO2 was covered to form a large active area. The specific capacitance of MnO2/PPy-400 single electrode reached 1 487.1 mF/cm2, 67% higher than that of pure PPy electrode. Under the simulated sunlight with the intensity of 1 kW/m2, the surface temperature of the assembled symmetrical supercapacitor increased from 21.2 °C to 46.7 °C after 10 min. The specific capacitance of the symmetrical supercapacitor assembled by the paper electrode with PPy of 400.0 μL was 52.9 mF/cm2 with illumination, five times that in dark, suggesting excellent photothermal effect to enhanced capacitor performance. [ABSTRACT FROM AUTHOR]

This paper introduces the conventional treatment methods of agriculture wastewater, including chemical methods and biological methods. These methods have problems of low efficiency, secondary pollution and high cost. Based on the significant advantages of microalgae purification of wastewater that can achieve pollutant removal and wastewater resource utilization, the current research status of microalgae purification of agriculture wastewater is described, and the problems of microalgae purification of agriculture wastewater are presented with respect to the current research. In view of these problems, suggestions are given to solve the problems of microalgae purification of agriculture wastewater, which provide a reference for the future use of microalgae to purify agriculture wastewater. [ABSTRACT FROM AUTHOR]

Achyranthes bidentata Blume is a water-soluble fructan extracted from Achyranthes bidentata Blume root. It is mainly composed of three monosaccharides, glucose, mannose and fructose. Achyranthes bidentata Blume polysaccharide has many biological functions, such as improving immunity, enhancing antioxidant capacity and maintaining intestinal flora balance, etc., and has high application and research value in livestock and poultry production. The paper introduces the chemical structure and extraction technology of Achyranthes bidentata Blume polysaccharide, summarizes the biological function of Achyranthes bidentata Blume polysaccharide, analyzes the research progress of its application in animal production, to provide reference for further popularization of Achyranthes bidentata Blume polysaccharide in animal production. [ABSTRACT FROM AUTHOR]

This paper takes smart cartography in the context of artificial intelligence as the starting point, analyzes the impact of space-time big data on cartography, points to three possible directions for the evolu‐ tion of the map, explains the connotation of smart cartography and its characteristics of crowd-sourced da‐ ta, user participation, model coupling and visual analysis, discusses in depth the explicit and implicit knowl‐ edge representation of smart cartography, proposes the idea of establishing a map knowledge graph, and outlines a platform development paradigm based on low-code technology. [ABSTRACT FROM AUTHOR]

With the development of Open Access (OA), China continues to publish OA papers at a high rate. Based on the number of China's papers from 2015 to 2020 in Web of Science (WOS) and journals' Article Processing Charges (APC), China's publishing fees in 2020 are calculated and the economic costs of transformation from libraries' subscription to OA publishing are estimated. The scale of China's OA development in the next five years is predicted. The paper assesses the economic feasibility and sustainability of f-. transforming academic journals from the subscription mode to the open access publishing mode, proposes '5f' the response strategy to OA for domestic research institutions and their libraries, and provides a reference for the formulation of relevant policies and negotiations of open access transformative agreements. [ABSTRACT FROM AUTHOR]

Two kinds of cellulose/ZnO piezoelectric papers are prepared by crushing and dissolving methods. The papers are characterized by SEM and analyzed by a piezoelectric equipment. The differences in the structure and piezoelectric performance of the two kinds of papers are explored. The effects of ZnO add-on amount, thickness of the papers, and pressure on the piezoelectric properties are discussed and compared with a PVDF film. The mutts show that the fibers of the piezoelectric paper prepared by the dissolving method are smooth and tightly bounded to ZnO, which makes ZnO uniformly coat on the surface of the fibers. The higher the pressure, the higher the piezoelectric properties. The thicker the piezoelectric paper, the higher the piezoelectric properties. The piezoelectric paper with 20% ZnO added by the dissolving method has high piezoelectric properties, and the maximum output current is 52.36 nA/cm². The piezoelectric properties of the piezoelectric paper are comparable to the purchased PVDF film. [ABSTRACT FROM AUTHOR]

[Purpose/Significance] Science funding provides financial support for academic institutions, researchers and research projects, and at the same time plays a guiding role in the development of scientific innovation. The research of funded papers contributes to the development of the discipline and is of great significance to the encouragement and support of researchers. [Method/Process] Based on the funded papers published in Chinese journals and foreign journals in the field of library and information science (LIS) during the "13th Five-Year Plan" period, this paper analyzes from the perspectives of the time distribution of papers issued, research output of difierent types foundations and the research topics. [Results/Conclusions] The number of fiinded papers published in Chinese journals in LIS from 2016 to 2020 has decreased year by year, but the number of fiinded papers published in foreign journals has slowly increased year by year; for funded papers published in Chinese journal during the "13th Five-Year Plan" period, provincial (municipal) foundations funded papers are more outstanding, and National Natural Science Foundation funded papers are more notable for the number and effects of the funded papers in foreign journals; the fiinded papers in Chinese journals show a great impact on library sendees, changes and data, digital resource construction and university libraries; while fiinded papers in foreign journals pay more attention to social media, theme models, scientometrics and library construction. [ABSTRACT FROM AUTHOR]

BACKGROUND: Due to the unstable drug release rate of uniaxial bone scaffolds, multi-structure composite printing methods have been sought in and outside China in recent years. Currently, coaxial drug-loaded bone scaffolds, which combine drug-loaded sustained release system with bone transplantation and repair technology, not only replace the defective bone after implantation, but also release drugs slowly, providing a microenvironment conducive to bone formation at the implant site. OBJECTIVE: To explore and assess the in vitro antibacterial properties of uniaxial and coaxial minocycline hydrochloride bone scaffolds. METHODS: Rapid prototyping technology was used to prepare uniaxial hydroxyapatite/silk fibroin-polyvinyl alcohol scaffold, uniaxial hydroxyapatite/silk fibroin-polyvinyl alcohol scaffold, coaxial hydroxyapatite/silk fibroin-polyvinyl alcohol scaffold, and coaxial hydroxyapatite/silk fibroin-polyvinyl alcohol scaffold, respectively, which were named S1, S2, T1 and T2. The morphology, porosity, degradation performance, in vitro sustained-release performance and cytotoxicity of scaffolds were characterized. Four kinds of bone scaffolds were immersed in PBS to prepare the extracts at different time points (1, 3, 5, 7, 14, 21, and 28 days). The qualitative filter paper was placed into the extract for 24 hours. The filter paper was co-cultured with Porphyromonas gingivalis and Fusobacterium nucleatum for 72 hours. The bacteriostatic effect of four groups of scaffolds was detected by the agar diffusion method. RESULTS AND CONCLUSION: (1) Scaffold characterization: Four groups of scaffolds were well formed. The surface of micro-wires in the S1 and S2 groups was dense and smooth, and the surface of micro-wires in the T1 and T2 groups was rough. Porosity was between 40%-47% and met the requirements of bone scaffolds. Compared with the S2 group, sustained release time was longer in the T2 group. The sustained release concentration of the drug was between 1- 10 μg/mL for a long time, which was more conducive to bacteriostasis and osteogenesis. After 10 weeks of immersion in PBS in vitro, the degradation rate of the coaxial printed bone scaffold was faster than that of the corresponding uniaxial printed bone scaffold, and the degradation rate of the coaxial loaded bone scaffold was lower than that of the coaxial non-loaded bone scaffold. The four groups of scaffold extracts were co-cultured with osteoblasts respectively. CCK-8 assay displayed that the cell proliferation rate was greater than 75%, which met the requirements of biocompatibility. (2) In vitro antibacterial effect: S1 and T1 did not have antibacterial activity. S2 and T2 had an obvious antibacterial effect. Under the extraction solution on day 28, the diameter of Porphyromonas gingivalis and Fusobacterium nucleatum inhibition zone in the S2 group was smaller than that in the T2 group (P < 0.05). (3) These findings exhibit that hydroxyapatite/silk fibroin-polyvinyl alcohol scaffolds with coaxial minocycline have good physical properties and bacteriostatic properties. [ABSTRACT FROM AUTHOR]

The proposal of a national strategy for the "New Western Land Sea Corridor" will affect the reconstruction of the overall freight distribution pattern in western China. As the most important hub node for cargo distribution and transshipment in inland areas, the inland port (or dry port) is of great significance to regional economic development, logistics systems, and the construction of a new regional development pattern. Therefore, 111 papers on inland port research in international core journals have been selected in this study to systematically review the research status of inland ports and put forward the key directions and development trends for future research to serve the theoretical research and construction planning practice of inland ports in China, and globally. In this study, the literature metrology method is adopted to divide inland port research and development into three stages: the first stage is the initial stage (before 2005); the second stage is the slow fluctuating growth stage (2006-2017); the third stage is the rapid increase stage (2018-present). Scholars are interested in inland port research mainly from mainland China, the Netherlands, Hong Kong, the United Kingdom, the United States, and other countries (regions). Related research topics on inland ports are mostly combined with transportation, logistics, and other fields, which indicates that inland ports have become an important part of transportation systems and supply chain transportation networks. Among specific related research topics, the concept of inland ports is an important research topic, mainly focusing on the differences in naming and function, facilities of inland ports under different geographical backgrounds, and additional functions extended with economic development; however, its concept has not yet been unified. Research on the spatial layout system of inland ports shows that the inland port site selection and layout can be roughly summed up as a supply chain-oriented pattern, and industrial cluster-oriented pattern; the former often near port cargo distribution of traffic nodes, while the latter is on the border between the end of the supply chain. The location and layout of inland ports are influenced by economic foundation, transportation infrastructure, and local policy factors. Inland ports have a profound impact on the region. In terms of spatial effects, they have an impact on urban spatial planning and land use; in terms of economic effects, they can promote regional economic development and employment; in terms of environmental effects, they can reduce energy consumption and emissions, and promote the realization of regional sustainable development. In the operation and control of inland ports, special attention should be paid to the relationship between port planning and each manager, as well as to the management system, to realize the efficient, sustainable, and healthy development of inland ports. Finally, based on the new trends of global inland port logistics research and the realistic demand of China, we put forward several suggestions for future research, including the redefinition of dry ports, spatial layout and planning of inland ports, their regional influence, the port-city relationship, risk of investment, and potential benefits of inland ports. [ABSTRACT FROM AUTHOR]

The keywords indexed hy published articles are one of the signs of literature retrieval, which can not only reflect the theme of the article and help readers quickly retrieve the required literature, hut all!O obtain important information such as research hotspots in the subject through keyword analysis of multiple journals. This paper makes statistics on the keywords of articles published in eight forestry journals from 2014 to 2018, and takes the keywords indexed by the articles published in these eight jownals as the research object. Co - word network and multi - dimensional scaling analysis methods are used to analyze the relationship between published article keywords and research hotspots in the field of forestry. The research shows that: the indexing rate of keywords in eight journals is 100%, and it is feasible to use keywords to obtain important information in the research of this discipline. Using word frequency analysis, co - word network analysis and multi - dimensional scaling analysis, the keywords and research hotspots that can reflect the current research hotspots of the discipline are obtained, and the accuracy of four types of hotspots is verified. It is intended to remind the author to pay attention to the use of keywords. [ABSTRACT FROM AUTHOR]

This study used bibliometrics to analyze the characteristics of funded papers in the social sciences in Taiwan from 2015 to 2019, including the number of funded papers, funded paper ratio, document types, fields, type of publishing organizations, journal impact, and paper citation impact. The results indicate that the number of funded papers and the funded paper ratio of SSCI papers from Taiwan have both increased. In addition to articles and reviews, conference papers are a major type of funded paper for local SSCI papers. In terms of fields, the nontraditional social sciences, such as environmental sciences, psychiatry, and public/environmental & occupational health, have a particularly high funded paper ratio. However, the number of funded papers and funded paper ratio is the highest in the field of education & educational research. The fields of economics, management, and business have a large number of funded papers but a low funded paper ratio. Universities are the main funded institutions, but hospitals have the highest funded paper ratio. Funded papers tend to have higher paper citation impacts. Therefore, funding positively affects the productivity and impact of SSCI papers from Taiwan. [ABSTRACT FROM AUTHOR]

The experiment was to study the pretreatment method of bagasse cellulose, optimize the composition of cellulase system and increase the amount of enzyme production. Bagasse cellulose was pretreated by microwave, phosphoric acid and steam explosion. The results showed that cellulase production and hemicellulase activity of Fusarium oxychlamycline HML278 were increased, the enzyme activity of filter paper was increased by 1.02 times than that of untreated material, and the enzymatic hydrolysis of glucose was increased by 100% compared with that of untreated bagasse. Aspergillus oryzae HML366 could produce β-glucosidase with high transferring-activity to synthesize gentiose. Gentiose could induce cellulase production from Fusarium chlamychii HML278. Fusarium oxychlamycline HML278 and Aspergillus oryzae HML366 had good compatibility, and the enzyme activity of filter paper was increased by 83.62% compared with Fusarium oxychlamycline HML278 and 93.09% compared with Aspergillus oryzae HML366. The study indicates that the mixed culture of Aspergillus oryzae HML366 and Fusarium oxychlamyclum HML278 is better than that of single strain. [ABSTRACT FROM AUTHOR]

In this paper, isopropyl triolein titanate is used as the modifier to modify the cellulose nanofiber (CNF), then the modified cellulose nanofiber is coated on the surface of A4 paper, and cured to obtain isopropyl triolein titanate (KR-TTS) modified nanocellulose paper-based barrier coating. The hydrophobicity and mechanical property of blank paper, nanocellulose paper-based coating (CNF coating), isopropyl triolein titanate modified nanocellulose paper-based coating with different KR-TTS/CNF mass ratios (K-CNF coating) are characterized by video optical contact measuring instrument and electronic tensile machine. The results show that the K-CNF coating sample with a KR-TTS/CNF mass ratio of 151 has the largest water contact angle, which is 113.4° and 98.4° higher than that of CNF coating and has better hydrophobicity. Compared with the CNF coating, the tensile strength, elastic modulus and toughness of the coating sample are increased by 156.73%, 101.69% and 430.41 %, respectively. The sample exhibits better mechanical properties. The barrier performance test of the coating shows that the air permeability of the modified coating sample with a mass ratio of KR-TTS/CNF of 1:1 is 25234 s/25 cm", which is 46.65 times lower than that of the CNF coating. Water vapor transmission rate is 1 203.67 g/mJ • 24 h, which is 73.47% lower than the CNF coating, and the barrier performance is well. In addition, the SEM images of the modified coating samples show that the tightly wound 3T) network structure fills the paper pores that the CNF coating fails to fill, forming a denser coating and giving it better barrier properties and toughness. [ABSTRACT FROM AUTHOR]

Paper mulberry (Broussonetia papyrifera) with high crude protein, biological yield and rich nutrients, was widely planted in China, and contains a variety of biologically active ingredients. Paper mulberry can improve the immunity and quality of livestock and poultry. Also, paper mulberry has been widely used in animal production and was listed in the feed catalogue of agricultural feed materials by the Ministry of Agriculture and Rural Affairs. The article reviews the nutritional value, processing methods, feeding techniques and feeding effects of paper mulberry in animal production, and provide a reference for promoting the feed utilization of paper mulberry. [ABSTRACT FROM AUTHOR]

[Purpose/Significance] "The Belt and Road" is an initiative proposed by China in recent years to cooperate and develop a community with a shared future for mankind, which has been continuously highly concerned by all circles at home and abroad. From the perspective of the citation of highly cited papers, the academic exchange of countries along the Belt and Road initiative cam provide a quantitative reference for future international academic and technological exchanges, collaborative innovation and development. [Method/Process] Based on the highly cited papers among the countries along the "The Belt and Road" in the WoS database from 2013 to 2018, this paper constructed a reference matrix and analyzed the network structure, and drew a national citation network map for cluster division. Furthermore, it explored the current state of academic exchange along the "The Belt and Road" and the direction of Chinese academic output, and further analyzed the correlation between Chinese academic exchanges and trade cooperation with other 64 countries along the route. [Results/Conclusions] The research results show that the countries along "The Belt and Road" have close academic exchange and obvious "small world" characteristics. China is the core of academic exchange and the highly cited papers in many research directions in China are cited by many countries along "The Belt and Road". Besides, academic exchange and trade cooperation between China and countries along "The Belt and Road" are strongly related. [ABSTRACT FROM AUTHOR]

In this study, tunicate cellulose nanocrystals(tCNC) were investigated as a filler added to bleached kraft pulp. First, tCNC were prepared through bleaching and acid hydrolysis. The structure, morphology, crystallinity, and particle size and zeta potential of the tCNC were characterized by Fourier transform infrared spectroscopy(FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and a malvern particle sizer, respectively. Second, kraft pulp with a consistency of 10% was refined to 42 °SR through a PFI refiner. Then 60 g·m-2 handsheets were prepared from this pulp. Prior to preparing the handsheets, tunicate nanocellulose was thoroughly mixed into the pulp at four gradients:0.3%, 0.6%, 0.9%, 1.2%, and 1.5%. Cationic polyacrylamides(CPAM) were added to the pulp slurry as a retention agent. A control experiment was set up accordingly. The effects of tCNC addition on the tearing, tensile, burst, air permeability, and optical properties of the handsheets were evaluated. The results indicated that the maximum increase in the tear index was 12.00% when tCNC was added 0.6%. The tensile index reached its maximum value when tCNC was added at 0.6%, with an increase of 12.04% compared to pure pulp sheets. The tensile index increased by 16.55%. In this experiment, nanocellulose prepared from a mantle sea animal was used for the first time as reinforcing filler in papermaking, which has greatly extended the application of tCNC in the enhancement of paper strength. [ABSTRACT FROM AUTHOR]

Background--The domestic paper industry is facing the challenges of multiple factors, such as the complex and changeable economic situation at home and abroad, the decline of market demand and so on. The regional comprehensive economic partnership (RCEP) agreement may become a new opportunity for development. Methods--By introducing institutional distance, this paper constructs the stochastic boundary gravity model and trade efficiency model of China's paper and paperboard export trade, and uses R software to study the influence of institutional distance on paper and paperboard export efficiency. Results--Institutional distance is one of the main factors affecting China's paper and paperboard export trade with RCEP countries. Different institutional distance will have different impact on China's paper and paperboard export to RCEP countries. Among them, the reduction of institutional distance in Property Right, Tax Burden and trade liberalization will hinder China's paper and paperboard export trade to RCEP countries. The reduction of institutional distance in monetary liberalization will help to expand China's paper and paperboard export trade with RCEP countries. While, the institutional distance between government expenditure and fiscal liberalization is not significant.②The influences of basic or common variables, such as the economic scales between China and sample countries, gross national income (GNI) of sample countries, the average years of education in sample countries, being adjacent to land, applying a common language, signing Free Trade Area Agreement with China and other basic or common variables on China's paper and paperboard export trade with RCEP countries, are in line with expectations and consistent with conventional researches. However, the distance factor has no significant impact on China's export trade of paper and paperboard to RCEP countries, and the scale of China's labor force has a significant positive impact.③China's export of paper and paperboard to RCEP countries is more efficient, and there is still great export potential in the future. There are obvious differences within RCEP countries. The efficiency and potential of China's paper and paperboard export trade to RCEP countries have obvious internal differences. Vietnam and Australia have high average export efficiency and a large proportion of export trade volume, which occupy an important position in China's paper and paperboard export trade to RCEP countries. Although the trade volume of India accounts for a large proportion, the average export trade efficiency of India is very low, which means that it faces great artificial restrictions and trade resistance. China's trade potential with Australia, Malaysia, Vietnam, the Philippines and Cambodia is closer to the actual trade volume, so it is necessary to explore new growth points of export trade. Conclusions and Discussions--It is suggested that the paper industry should actively support and promote RCEP negotiations, because the impact of the change of institutional distance on China's export trade of paper and paperboard in RCEP countries is generally greater than opportunities. RCEP agreement is conducive to reducing tariff and non-tariff barriers and promoting free trade, which may become a new development opportunity for the paper industry.②The paper industry is supposed to promote industrial transformation and upgrading as soon as possible, and strive to improve the added value of products.③It is necessary to understand the internal differences of RCEP countries and to adopt different trade strategies according to different situations. At the same time, it is best to target countries with high export efficiency, such as Australia and some ASEAN countries, to explore new trade growth points. And for the countries with great export potential, such as South Korea and Japan, it is proposed to reduce trade barriers and improve the efficiency of export trade. Finally, it is suggested to focus on the Indian market and further improve the openness of bilateral trade. [ABSTRACT FROM AUTHOR]

Tobacco smoke contains a large number of harmful substances and has been widely proved to be able to induce a variety of human diseases. Human eyes are exposed to ambient air for a long time in daily life and are susceptible to air pollutants such as tobacco smoke in the air. Therefore, direct monitoring of characteristic components of tobacco smoke in human tears is expected to efficiently assess the exposure level of tobacco smoke to human eyes. Due to human tears at the microliter level, conventional sample collection and chemical analysis methods are a challenging task. Mass spectrometry (MS) has the unique advantages of high sensitivity, specificity and speed, especially, the development of ambient MS with solid substrates has greatly facilitated direct sample analysis with little or no sample pretreatment. Schirmer paper strip is clinically used for sampling of human tears, which is safe, non-invasive, and can be used for measuring the volume of tears. In this study, a small Schirmer paper strip was further prepared for noninvasive microsampling of human tears which exposed to tobacco smoke, and high voltage and an organic solvent were applied onto Schirmer paper to directly generate paper spray ionization for ambient MS analysis. The good analytical performances, including sensitivity (LOD: 0.1 μg/L, S/N≥3; LOQ: 1.0 μg/L, S/N≥10), precision (RSD: 4.89%-7.61%, n=5, with internal standard), recovery (98%-102.1%, n=5), and linear range (0.5-50 μg/L, R2=0.991 8) were achieved. Monitoring nicotine in human tears under different exposure times was also investigated, showing that the concentration of nicotine will the increase with increasing the exposure time ranging from 0 to 8 min. The nicotine can research to be 45 μg/L after burning a cigarette (about 8 min). The retention time of nicotine in human tears was found to be about 20 min (less than 5%), and the half-life time is about 4 min. Overall, our results show that Schirmer paper spray mass spectrometry could be used for qualitative and quantitative detection of trace environmental exposures such as nicotine in human eyes with many advantages, including safe, noninvasive, easy-to-operation, low-consumption as low as 1.0 μL, and thus has potential for many applications in environmental exposure and human health. [ABSTRACT FROM AUTHOR]

Quinones in PM2.5 are harmful substances that can damage body's immune system by generating reactive oxygen species (ROS), which are mainly produced by the incomplete combustion of fuels such as petroleum, coal, wood and cigarettes. Meanwhile, the gas-phase reaction between poly aromatic hydrocarbons (PAHs) and oxidative substances including ozone and radical species will result in the secondary formation of quinones. Rapid determination of quinones in PM2.5 is the basis for the health risk assessment and atmospheric environment quality control. However, the traditional methods for determining quinones in the atmosphere are time-consuming and labor-intensive, such as gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS). Here, paper spray mass spectrometry was introduced for the rapid determination of quinones in PM2.5, which was an ambient ionization technique developed in 2010. The ionization efficiency of quinones in paper spray is low for their weak polarity and low proton affinity. To improve their ionization efficiency, an amino group was introduced into the quinone structures through the derivatization reaction between thiol reagents and quinones. The reaction conditions, including the type of derivatization reagent (glutathione, cysteine and cysteamine), spray voltage (3-5 kV), and spray solvent composition (acetonitrile, acetonitrile-alcohol (1∶1, V/V), acetonitrile-methanol (1∶1, V/V), acetonitrile-ethyl acetate (1∶1, V/V), were optimized. The results showed that the best performances were achieved with cysteamine as the thiol reagent, 5 kV as the spray voltage, and acetonitrile as the spray solvent. Under the optimal conditions, the analysis performances of the derivative-based paper spray for the determination of four quinones (1,4-benzoquinone, methyl-p-benzoquinone, 1,4-naphthoquinone and 1,4-anthraquinone) were characterized. With BQ-D4 and 1,4-NQ-D6 as internal standards (IS), it showed good linearity for 1,4-benzoquinone (IS, BQ-D4), methyl-p-benzoquinone (IS, BQ-D4), 1,4-naphthoquinone (IS, 1,4-NQ-D6) and 1,4-anthraquinone (IS, 1,4-NQ-D6) analysis with correlation coefficients (R2) of 0.990, 0.993, 0.992, 0.990, respectively. Based on three times of the standard deviation of 11 blank values (3×δblank/k, k is the slope of the linear equation), the limits of detection (LODs) of BQ, MBQ, NQ and AQ were 4.49, 20.89, 0.13 and 0.17 ng, respectively. In addition, good qualitative and quantitative results were obtained for the analysis of 1,4-naphthoquinone and 1,4-anthraquinone in PM2.5. This work provides a rapid, simple, low-cost and environment-friendly method for the quality control of quinones in PM2.5. However, the repeatability and quantitative ability of the derivative-based paper spray mass spectrometry should be further improved in the future, such as by the means of modifying the chromatographic paper with nanomaterials. [ABSTRACT FROM AUTHOR]

Aramid paper has been widely applied in the field of insulation because of its excellent electrical insulation performance, thermal stability and mechanical properties. However, the porosity of aramid paper is a weakness easy to b e broken down, which limits the performance and application expansion of aramid paper. To solve this problem, aramid papers w ere made from aramid floes and aramid fibrids with different proportions, and then coated with various insulating adhesives ( styrene-butadiene latex, polyvinyl alcohol, polyetherimide, silicone rubber, phenolic resin and urea-formaldehyde resin) to fabricate aramid-coated paper. The effects of fiber ratio and adhesive on the microstructure, electrical insulation properties, mechanical properties and thermal stability of coated paper were studied. The results show that coating adhesive can effectively improve the insulation properties and mechanical properties of aramid paper. Coated with phenolic resin, the breakdown strength of aramid-coated paper has the greatest improvement. When the ratio of aramid fibrids and aramid floes is 3 : 7, the breakdown strength and corona time of aramid-coated paper are up to 41 kV /mm and 434 h, respectively, which are 3. 6 times and 7. 3 times higher than that of the base paper. When the ratio of aramid fibrids and aramid floes is 7 : 3 and styrene-butadiene latex is used as adhesive, the tensile strength of aramid-coated paper reach 93. 7 N • m/g. More importantly, the coating method is a mature industrial production process in the paper industry, which will improve the possibility of industrial production of aramid-coated paper. [ABSTRACT FROM AUTHOR]

The paper straw base paper was prepared from bleached softwood pulp and hardwood pulp, and the optimum preparation technology was determined by studying the influence of size ratio, wet strength agent and sizing agent dosage on the general performance index of the base paper. The safety of paper straw base paper was measured by measuring the content of warm water extract. The results showed that the best ratio of raw materials for lining paper and face paper is 30 : 70 and 40 : 60(softwood : hardwood)，the dosage range of wet strength agent for lining paper and face paper is 0. 50% 〜0. 75% and 0. 75 % 〜1. 00% respectively，and the dosage range of sizing agent is 0. 25% 〜0. 30%. Under this condition， the base paper has betterwet strength，tensile strength，absorption，etc. When the dosage of APMP is 30% ,the stiffness of lining paper and face paper increased by 3. 51% and 2.23%, respectively. The water extraction content of lining paper and face paper is only 0. 218% and 0. 206 % respectively, which satisfied the safety of pipette base paper. [ABSTRACT FROM AUTHOR]

Paper spray mass spectrometry has received considerable attentions in recent years due to its simple operation, low cost and without tedious sample pretreatment prior to analysis. However, paper spray ionization (PSI) as a type of electrospray-based ionization source, there are few reports on exploring the ionization performance differences between it and two frequently used electrospray ionization (ESI) and nanoelectrospray ionization (nanoESI). Herein the ionization performance of above three ionization sources was compared systematically by using gasolines, myoglobin, cytochrome c and glycidyl azide polymer (GAP) as samples. According to the obtained results, the ionization performance demonstrated the following trend: PSI

This study sought to identify the opinions of the Egyptian academic medical elite in the treatment of news sites for preventive medicine crises (corona vaccine model) and their assessment of this treatment and their trends towards it. The study relied on the method of media survey and it used the tool of electronic and paper questionnaire to collect data. The Egyptian academic medical elite chose the site of the seventh day with a relative weight of (61) in the front of the sites that were keen to follow it in the treatment of the Corona vaccine, and then sky news Arabic at a relative weight (57), and then the website BBC Arabic at a relative weight (56), and also chose breaking news form first, which is keen to follow it in the treatment of corona vaccine at a relative weight of (80.3), and then live broadcast at a relative weight (62), and then news reports at a relative weight (61). (48.5%) of respondents considered corona vaccine treatment on news sites to be fairly in-depth, (37.9%) felt superficial, and (13.6%) felt it was in-depth. A statistically significant correlation between the assessment of the Egyptian academic medical elite to address corona vaccine news sites and the degree of follow-up to them has been established. A statistically significant correlation between the degree of follow-up of the Egyptian academic medical elite to treat corona vaccine on news sites and their levels of confidence has also been established, while a statistically significant correlation between the elite's follow-up score for corona vaccine treatment on news sites and the effects of follow-up has not been established. [ABSTRACT FROM AUTHOR]

Background-- China is Lhc largesL producer and consLimcr of paper and paperboard in Lhc world. WiLh Lhc rapid devclopmcnL of Lhe paper indnsLry, cnvironmcnLal polluLion，especially waLcr consumpLion and waLer polluLion, is also accompanied. ITie fresh waLcr consumpLion acconnLs for abouL 8. 6% 〜8. 9% of Lhe na- Lional indiisLrial waLcr consumpLion, and iLs sewage discharge Lakes up abonL 13% 〜14% of Lhe naLional industrial was Lc waLer. Methods-- Based on Lhe panel daLa of paper indusLry in Shandong Province and Jiangsu Province from 2008 Lo 2017，Lhc sLaLic ecological efficiency of Lhc Lwo provinces is analyzed by using Lhe SBM-DEA model of LinexpccLcd oiiLpiiL, and Lhc driving facLors of LoLal producLiviLy growLh in Lhc paper indiisLi'y arc dynamically analyzed by using Lhc ML index. ITicsc daLa arc mainly from China paper Yearbook (2008-2017). Results-- The rcsulLs show LhaL:①The average sLaLic ecological efficiency of paper indnsLry in Shandong Province and Jiangsu Province arc 0. 91 and 0. 41 in Lhc pasL 10 years，which shows LhaL Lhe ecological efficiency of paper indnsLry in Shandong Province is significanLlv higher Lhan LhaL in Jiangsu Province. In addiLion, paper industries in Shandong have done a good job in boLh reducing cnvironmcnLal polluLion and improving economic onLpiiL. iLs high sLandard of cnvimnmcnLal rcgiilaLion leads Lo high ecological efficiency. Moreover, Lhc improv emenL poLenLial of Lhc five indie aLors of paper indiisLi'ics in Shandong is less Lhan 1%, which indicaLcs LhaL Lhc polluLion emission has been well conLmlled. llowcvcr，Lhc reasons for Lhc low ecological efficiency of paper indiisLi'ics in Jiangsu Province arc noL only Lhc excessive consumpLion of resources and Lhc discharge of pollii- LanLs，bnL also Lhe insufficiency of economic oiiLpnL, among which Lhe excessive discharge of COD and AM is Lhc primary i nil nene ing facLor.② The TFP of paper indnsLries in Shandong Province is obviously higher Lhan LhaL in Jiangsu Province. The gmvvLh of LoLal producLiviLy in Shandong paper indnsLries is due Lo Lhe improv emenL of MLTEC11, and mosL of Lhc paper cnLerpriscs in Shandong Province choose cnvironmcnLally sound Lcchnologv Lo achieve cnvironmcnLal rcgidaLions, and Lhcsc Lechnological innovaLions effeeLively improve Lhe ecological efricicncy of enLerprises. However， Lhe low TFP of paper indnsLries in Jiangsu is due Lo Lhc decline of MLTEC11. In reccnL veal's, some paper enLerprises in soiiLhcrn Jiangsu arc gradually shifLing Lo norLhern Jiangsu. Compared vviLh soiiLhcrn Jiangsu, which has more perfeeL polluLion conLrol faciliLies, Lhc paper indiisLry in JNorLhern Jiangsu is hound Lo form a larger cnvimnmcnLal polluLion load. Conclusions and Discussions-- This paper provides Lhe following Lhree siiggcsLions for Lhe dcvclopmcnL of paper indiisLi'y in Jiangsu Province. FirsLlv, Lhc paper indnsLry in Jiangsu Province should sLrengLhen Lhc supervision of Lhe discharge sLandards of paper-making wasLewaLer in Lhe norLh of Jiangsu Province, and Lhe en- Lcrpriscs should be rcgiilaLed according Lo Lhc rules LhaL fail Lo meeL Lhc discharge sLandards Lo rccLify or shiiL down in Lime. Secondly, Lhc paper indiisLi'y in Jiangsu Province should speed up Lhc pace of indLisLrial res Lr Lie Luring ,achieve scale effeeL and inLernalizc Lhe cosL of polluLion conLrol. And Lhc problem of raw maLerials in papermaking indnsLry should be paid more aLLenLion Lo. FnrLhermorc, Lhe access Lhreshold for enLerprises Lo enLer Lhc paper indnsLry and snpporL merger or rcorganizaLion needs Lo be enlarged. Thirdly，cleaner proclncLion Lechnologv Lo improve Lhe ecological efficiency of paper indiisLi'y should be vigorously promo Led in Jiangsu Province. Papermaking enLerprises need Lo be cncoLiraged Lo conLinnc Lo increase invcsLmcnL in cnvironmcnLal pro Lee Lion, research and devclopmcnL, and innovaLion of cleaner prodhcLion Lcchnologv. [ABSTRACT FROM AUTHOR]

临床研究论文作为临床研究成果的主要呈现形式, 具有重大的科学价值。使用临床研 究报告规范能够提高论文的完整性、科学性和规范性, 是产生高质量研究证据的关键。笔者将结合糖 尿病经典案例, 介绍临床研究常用的报告规范和论文撰写要点, 以期为糖尿病临床研究论文撰写提供 帮助和参考。. [ABSTRACT FROM AUTHOR]

[Objective] The study aimed to elucidate the effects of two kinds of organic potassium salt cigarette auxiliaries on the pyrolysis performance of cigarette paper. [Method] By adding two kinds of organic acid potassium salt with different concentrations to cigarette paper, the effects on the pyrolysis performance of cigarette paper were studied by means of simultaneous thermal analysis, mainstream smoke detection and sensory quality evaluation. [Result] With the increase of the concentration of potassium carbonate and potassium citrate, the initial temperature of thermogravimetric loss gradually decreased, and the increase of weight loss rate and weight loss in the initial heating period corresponded basically with the addition concentration. With the addition of potassium citrate in the cigarette paper, the number of smoking pons decreased gradually, and the content of nicotine and tar also decreased gradually. When the addition amount was 3 %, the release of CO was the lowest, and then increased with the increase of the addition amount. With the addition of potassium carbonate in cigarette paper increasing, the number of smoking mouthfuls firstly decreased and then increased slowly, and the content of nicotine and tar also showed a decreasing trend. When the addition amount of potassium carbonate in cigarette paper was 3.5 %, the content of nicotine in cigarette paper and the number of smoking mouthfuls were the least. When the concentration was 2.5 %, the CO content was the lowest. [Conclusion] The use of cigarette paper additives catalyzed the thermal cracking process of cigarette paper, which resulted in the decrease of tar and CO content in mainstream smoke and affected the sensory quality of cigarettes. [ABSTRACT FROM AUTHOR]

Objective　To understand the development status in the subject of pharmacy and provide recommendations for the construction of universities and the development of pharmacy by the bibliometric analysis of pharmaceutical papers from Double First-rate universities in China. Methods　China National Knowledge Network (CNKI), Wanfang and VIP databases were searched for Chinese literature, and Scopus database was searched for English literature. Duplicates and non-research literatures were deleted. 12 028 literatures were included. Excel 2016 software was used for statistical analysis. Results　From 2014 to 2019, the total number of papers published by Double First-rate universities increased year by year, with the highest increase rate of 14%. From 2014 to 2020, 11 178 papers were published in international journals, while only 850 were published in domestic journals. Nearly 93% of pharmaceutical papers flowed to foreign journals. Peking Union Medical College published the most papers in international journals. Sun Yat-sen University published the most SCI papers. Peking University published the most papers in domestic journals, while Fudan University published the highest number of papers in Q1 area. Only a few papers published with international coauthors from colleges or universities. The cooperation works were limited in the same province or municipality directly under the central government. Conclusion　Double First-rate universities should focus on strengthening international cooperation and inter-provincial cooperation, improving industry-university collaboration, and accelerating the transformation from scholar research to productions. [ABSTRACT FROM AUTHOR]

Traditional ion sources generally require complex sample pre-processing for the analytes, which is time-consuming and labor-intensive, and cannot meet the requirements of rapid on-site detection, this problem greatly restricts the scope of application of the mass spectrometer. Atmospheric pressure ion source is a new type of ionization technology which has emerged in the last ten years, and it is also one of the hotspots in the application of mass spectrometry technology in life sciences, environmental protection, medicine and health, food safety and other fields. With the wider application of mass spectrometry technology, direct and rapid analysis of the composition and content of complex system has become more and more important. Based on the developed miniaturized ion trap mass spectrometer and electric-filter paper spray ion source, this paper conducted in-depth experimental research on their analytical performance and application. With the aim of improving the signal intensity and detection sensitivity of the mass spectra, the aperture of the filter paper, the angle between the tip of the ion source and the horizontal plane, the distance between the ion source and the mass spectrometry injection capillary, and the material of the metal funnel were systematically optimized. The experimental results showed that when the filter paper with a pore size of 20-25 μm, the angle between the ion source tip and the horizontal plane is 15°-60°, and the distance between the ion source and the mass spectrometry injection capillary is 7.5 mm, the signal intensity is the highest, the used different metal materials have little effect on the signal intensity of the ion source. Under the optimized experimental conditions, standard samples of sucrose, kemptide, vitamin B2, rocuronium, arginine and fentanyl were tested, which greatly expanded the application range of the ion source. Analysis and detection of ammonia plus Huangmin capsules could quickly obtain the molecular ion peak of paracetamol (m/z 152), and the malachite green (m/z 329) molecular ion peak could be quickly detected in the living fish. In summary, the electric-filter paper spray ion source can realize rapid real-time detection and analysis, and reduce the complicated pre-processing process of the analytes. Furthermore, it can improve the sample analysis speed, and expand the application field of ion trap mass spectrometry technology. [ABSTRACT FROM AUTHOR]

Flexible conductive materials are getting more and more attention in the field of information media. The conductive filler with high conductivity and stable chemical properties is an important part in the preparation of cellulose based flexible conductive paper. In this study, firstly, the fractal silver particles with three-dimensional morphology were prepared by liquid phase reduction method, and by adjusting the reaction rate and reactant ratio, the fractal silver particles with three kinds of morphology were prepared. It was mixed with cotton cellulose solution and vacuumized to obtain conductive paper. Results showed that the secondary structure of the fractal structure of silver particles has good electrical conductivity. At the same time,it has good flexibility and stability, which can be use d in flexible circuit. [ABSTRACT FROM AUTHOR]

The effect of cyflumetofen (CYF) on non-target organism earthworms (Eisenia fetida) in soil is unclear. In this study, a method was established for detection of CYF in earthworms. The samples were extracted with acetonitrile, the lipid in the earthworms was removed by liquid-liquid extraction, and then the concentration of CYF was detected by normal phase-HPLC. The results showed that the recoveries were 84%-88%, and the relative standard deviation was 1.3%-3.1% at the spiking levels of 0.5, 5, and 10 mg/kg, which verified the reliability of the method. According to the Biota-soil accumulation factor (BSAF), the enrichment concentration of the two enantiomers reached the maximum on the 7th day that the earthworms were enriched with CYF, and the enrichment ability of (+)-CYF in the earthworms was significantly higher than that of (−)-CYF. Long-term exposure of 0.5-10 mg/kg CYF for 28 days seriously inhibited the body weight of earthworms. The acute toxicity of cyflumetofen to earthworms was detected by filter paper method. The LC50 of rac-CYF, (−)-CYF, and (+)-CYF to earthworms was 162.5, 323.1 and 309.4 mg/L, respectively. According to the combined toxicity analysis, AI = −0.03 was obtained. The simultaneously use of the two enantiomers of CYF will cause additive toxicity to earthworms. [ABSTRACT FROM AUTHOR]

In the past 1 years, the amount of published paper of CSSCI core journals and economic management journals in china has declined abnormally, which may reduce the effective information of academic journals. This paper proposes to use the new diffusion factor, the number of keywords per article, and the number of articles to standardize and then harmonize the average to reflect the information density of the journal and also proposes the journal information density factor index. It then comprehensively uses the statistical methods of correlation coefficient, regression analysis and independent sample t test to verify the indicators. The results show that the issue of academic journals' information density should be paid more attention; the journal information density factor is a good evaluation index, which is not related to the impact factor, positively correlated with the h index and publishing capacity, and obeys the normal distribution. And the design of periodical evaluation index should have the function of dynamic control. [ABSTRACT FROM AUTHOR]

Natural cellulose paper is hygroscopic and has weak mechanical properties,which limit its potential applications in paper-based electronics.In order to solve these problems,we successfully develop a new kind of paper-based composites for paper-based strain sensors fabrication by infiltrating polyester vitrimer into porous cellulose paper via physical coating.Experimental results show that the resultant paper composite not only has excellent mechanical properties(tensile strength is up to 72 MPa) but also show excellent water resistance.In addition,the paper-based strain sensor made from the resultant composite has high sensitivity(GF=43),fast response time(0.19 s),good durability(3 000 cycles of stretching),showing promising applications in wearable devices for human motion monitoring. [ABSTRACT FROM AUTHOR]

The research method is the propeller of academic research and the fundermental guarantee for high quality scientific research. In recent years, the continuous enrichment and development of library science research methods have effectively promoted the development of disciplines. This paper summarizes the data collection methods, research methods and software tools used in 1048 articles published in 12 core journals of library science over the past 10 years, analyzes the interrelationship and cross-use among them, and points out the application status and existing problems of the research methods. It is considered that the emphasis on method and tool learning, rational selection and standardized use of research methods, paying attention to practical case studies, the strengthening of cross-integration between methods are effective ways to improve the quality of academic papers and standardize discipline research. [ABSTRACT FROM AUTHOR]

Objective: To understand the papers and citations of Chinese scholars in four famous international journals of psychiatry in 2010 - 2019, so as to provide the basis for domestic researchers to publish high-level pa pers. Methods: The Web of Science data resource platform was used as the retrieval source to retrieve the articles, including Article, Editorial, Review and Letter, published by Chinese scholars in the four journals of World Psychia try, JAMA Psychiatry, Lancet Psychiatryand American Journal of Psychiatry from 2010 to 2019. The time of publi cation, literature type, citation and highly cited papers of ESI were analyzed by using bibliometrics. Results: During 2010 -2019, Chinese scholars published 193 articles in the four psychiatric journals, of which 104 articles were pub lished as the first author or corresponding author, of which 6 were selected as highly cited papers of ESL Among the types of articles, there were 47 articles, 35 letters, 18 editorials, and 4 reviews. Papers were cited 37 times, 17 times, 20 times and 35 times respectively. Conclusion: During 2010 - 2019, the number of papers published by Chinese scholars in the four psychiatric journals has continued to grow, and the number of citations is high, the papers with high ESI citation is not much, and the proportion of Articles in some journals is not high. [ABSTRACT FROM AUTHOR]

The preparation and formation characterization of carbon fiber paper were carried on in this paper. The results showed that the appropriate beating degree of plant fiber was abtained at 45- 50° SR for a relatively good formation of carbon fiber paper. In the condition of carbon fiber content 5%, the burst index of carbon fiber paper could be reach to 5 kPa • m² /g or up, tear index could be reach to 8.0 mN • m²/g, and breaking length was about 6 km. The better formation could be gained in the condition of 4 mm length of carbon fiber. Under the same applied voltage condition, when the carbon fiber content increased from 5% to 10%, the resistance value dropped sharply. When the carbon fiber content was continued increasing, decreasing trend of the resistance value slowed down. The different electrical requirements of carbon fiber paper could be achieved by adjusting the content of carbon fiber. [ABSTRACT FROM AUTHOR]

Low temperature curing conductive silver paste is a key functional material for the preparation of various electronic components. Silver and ethyl cellulose were used as conductive fillers. According to the mass ratio of ethyl cellulose/silver nitrate of 2 = 1, 1 = 1, 1=2 and 1=3, short rod-shaped conductive silver was prepared by redox method. Through the resistivity measurement and microscope observation, the effects of physical factors (heating sintering, ultraviolet light irradiation, water soaking, ultrasonic waves, etc.) on the electrical conductivity of the electronic paper formed by the short rod-shaped conductive silver paste were studied. The electronic paper obtained at a ratio of 2 = 1 and 1 = 1 was extremely resistant, and the electrical resistivity of the electronic paper at a ratio of 1 = 2 and 1 = 3 could be reduced to 50% to 60% of the initial value during the heating and sintering process. At the same time, the conductivity was relatively stable under the conditions of heating and sintering, ultraviolet light irradiation, water soaking, ultrasonic wave, etc., and the conductivity of ethyl cellulose/silver nitrate for the ratio of 1 = 2 was extremely well. Finally, the conductive silver paste prepared by the ethyl cellulose/silver nitrate mass ratio of 1 = 2 was mixed with the ink in a volume ratio of 30%, 45%, 60%, respectively. And the mixture was coated onto the paper to obtain electronic paper, and then sintered. The resistivity dropped to 96.6% of the starting value, which was 15 mΩ/cm. [ABSTRACT FROM AUTHOR]

In order to investigate the effects of cigarette paper properties on the combustion coal fallout propensity of burning slim cigarette, cigarette paper with different parameters ( grammage, air permeability, hemp pulp content, ash content, burn promoter content and proportion of potassium salts in burn promoter) was selected and the samples of fine cigarette were made. The parameters were set optimization. The results showed that the combustion coal fallout propensity of slim cigarettes decreased rapidly with the increase of paper grammage. The presence of air permeability, hemp pulp content and ash content in cigarette papers was able to promote the fallout propensity of combustion coal, in a content-dependent manner. Meanwhile, air permeability of cigarette paper exhibited a positive correlation to the combustion coal fallout propensity. The change of burn promoter content had no significant effect on reducing the tendency of the fallout propensity of combustion coal, while the excessively high proportion of potassium salts in burn promoter would cause the tendency of the fallout propensity of combustion coal to fall rapidly. The four parameters of air permeability, grammage, burn promoter content and proportion of potassium salts in burn promoter were sorted in descending order of the influence on the combustion coal fallout propensity as below: air permeability > grammage > proportion of potassium salts in burn promoter > burn promoter content. The combustion coal fallout propensity decreased from6. 3% to 2.5% with the optimum cigarette paper parameters of air permeability 50 CU, grammage 34 ⋅ m-2, proportion of potassium salts in burn promoter 50%, burn promoter content 1.5%. [ABSTRACT FROM AUTHOR]

This paper proposed a collaborative topic regression model based on the preference for frequent topic sets to address the item-cold-start problem in academic paper recommendation. The algorithm took into account the user' s preference for research hotspots when selected academic papers, and used frequent topic sets to represent research hotspots. So, it expressed user' s preference for research hotspots as the user's preference for frequent topic sets. Firstly, it obtained the papers-topic probability distribution matrix through LDA algorithm and filter out the topics with higher probability. Then, the algorithm mined the frequently-occurring topic sets and gets the relationships between papers and frequent topic sets. Finally, it used the user's preference for frequent topic sets for the prediction of unknown scores. Experiments on CiteULike datasets show that the algorithm improves the recall, accuracy and RMSE over the matrix factorization model and the collaborative topic regression model. [ABSTRACT FROM AUTHOR]

There are many problems in the process of collecting paper data using single data source, such as insufficient data comprehensiveness and limited data collection speed due to website access frequency limitation. Aiming at these problems, this paper proposed a paper data crawling technology for multi-data sources. Firstly, it used the four Chinese document service websites-How Net, Wanfang Data, Weipu, and Chaoxing as data sources, completed the task of crawling and parsing list page data for the search keywords. Then it used the task scheduling strategy to remove repeated data and balance the tasks. Finally, it used multi-threads for each data source to crawl, parse and store the detail information of the papers, and built a website for search and display. Experiments show that under the same crawling and parsing speed, this technology can complete the paper information collection task more comprehensively and efficiently, which proves the effectiveness of this technology. [ABSTRACT FROM AUTHOR]

T he construction of efficient heterogeneous Fen ton-like catalytic system is the key to sewage treatment. In this study, a paper-based immersion catalyst ( MnO2 / CH-FP) was prepared by alkali-oxidation on cellulose filter paper (FP) cross-linked with chitosan (CH ) . SEM, XRD, FT-IR and TGA were used to characterize its properties. Its catalytic performance in methylene blue ( MB) heterogeneous Fenton-like degradation reaction was studied. T he effects of pH value, catalyst dosage, initial MB concentration and amount of H2O2 on the degradation efficiency of MB were investigated. The results showed that under the optimal conditions, MB (10 mg/L) could be degraded 100 % within 60 min. In addition,MnO2 / C H - FP can be easily separated from the reaction system and can be reused for four cycles after a simple cleaning without significantly reducing the catalytic activity. [ABSTRACT FROM AUTHOR]

《糖尿病足溃疡预防和管理的研究和论文质量评价标准：需要的基本内容和高质量的标 志》一文是由国际糖尿病足工作组和欧洲创面管理学会联合发表的1篇重要文献, 作为衡量已经发表 的糖尿病足溃疡的临床研究与论文质量的标准, 特别是2019国际糖尿病足预防与管理系列指南录选 引用论文的主要标准。文中强调糖尿病足临床研究设计、实施和结果报告及论文发表中需要注意的 问题, 并为糖尿病足溃疡临床研究与相关论文的科学质量评估提出了21条评分标准。笔者对此文进 行摘译和解读. [ABSTRACT FROM AUTHOR]

In the early period of Yi Dynasty of Korea, currency and physical transactions were parallel, and the market order was chaotic. During the reign of Emperor Taejong, the Banknote Law was established and carried out, and measures such as replacing physical objects with paper money, establishing joint purchase houses and determining the crime of hiding cloth were adopted to enhance currency credit. Although the law promoted circulation, monetary reform was not smooth. In this study, based on the economic historical data of the dynasty and the game theory method, the author find that the Yi Dynasty tries to improve the relationship between the state and the grassroots society and explore new economic policies through national finance and monetary reform. The failure of monetary reform is not only a policy failure, but also a consequence of uneven distribution of interests among different subjects. [ABSTRACT FROM AUTHOR]

In order to determine an appropriate size of paper-making reconstituted tobacco, three kinds of tobacco sheets with different sizes were made. Its moisture retention performance and hygroscopicity were analyzed and its cutting performance was evaluated. The processing performance of the pipe tobacco on the silk processing line was studied, and then the pipe tobacco was applied to the cigarette products for comparative analysis of sensory quality. The results showed that there was no significant difference in moisture retention performance and hygroscopicity among three kinds of tobacco sheets, but the water absorption and water loss rate of small-sized tobacco sheets were slightly faster. The whole cutting rate of small-sized tobacco sheets decreased slightly, and the shredding rate increased slightly, but the difference between medium-sized and small-sized tobacco sheets was not obvious. The blending uniformity of finished pipe tobacco blended with small-sized tobacco sheets was better, the filament winding and caking were reduced, the crushing in the processing process was reduced, and the physical index of the cigarette in the rolling process was stable, which could reduce the consumption of pipe tobacco to a certain extent. The cigarette samples blended with small-sized tobacco sheets had lower smoke irritation and improved aroma texture. [ABSTRACT FROM AUTHOR]

Increasing filler content in paper products and saving fiber resources are the permanent goals in paper industry. In this work, precipitated calcium carbonate and cellulosic fiber were refined in PFI mill so as to improve the paper strength and optical properties. Results showed that co-refining method deliver nine percent higher in filler content than regular filling method when the paper tensile index was similar ( 26 ~ 28 N • m/ g) . In addition, light scattering coefficient was also enhanced by co-refining. The images obtained by scanning electron microscopy implied that particle breakage and formation of filler-fiber composite during co-refining help to improve paper strength and optical properties. [ABSTRACT FROM AUTHOR]

The dispersibility of carbon nano tubes (CNT) has a decisive influence on the electrical h eating performance of electro-heating paper. In this paper, sodium dodecyl sulfate ( SDS) was used as a surfactant, the dispersion of carbon nano tubes and the dispersion stability of the blended slurry were characterized, respectively. And compound paper was prepared and characterized. Furthermore, we fabricated the compound electro-heating paper and characterized its performance. The results show that when the SDS concentration was 0. 04 wt %, the Zeta potential of the CNT dispersion was - 40. 1 m V, and its dispersibility and stability were excellent. When the input power was 1. 5 W, the paper can be quickly heat ed to 120 °C in 16 s. Electro-heating paper-based material exhibits excellent mechanical performance, electrical performance, heat resistance and electro-heating performance, which makes it the promising candidate to be applied in industrial heating and warmth retention. [ABSTRACT FROM AUTHOR]

A standardized operation of the paper pot machine has not been achieved. Therefore, the effects of humidity on uniformity were investigated. The filling volume and sawing length of the machine-produced paper pots were measured under various humidity conditions(20%,31%,47%,63%,67%,89%,98%) and analyzed in SPSS. The results showed that humidity influenced the set filling volume versus the actual filling volume, as well as the sawing length, except under 63% and 67% humidity. Homogeneity of the data variance was calculated, and the paper pots prepared under 63% and 67% humidity were significantly different (P<0.05) from the other levels. In these cases, the actual filling volume was comparable to the set volume, and the sawing length was similar to the standard sawing length. The low standard deviation, coefficient of variation, and dispersion indicate that the optimum humidity range for machine paper pot formation is between 60% and 70%. Paper pots produced in this humidity range had a production pass rate of 99.17% and a total qualified seedling rate of 89.88%. Paper pots produced within the optimal humidity range enables a more uniform filling volume and sawing length. Additionally, the pass and qualified seedling rates can be improved. [ABSTRACT FROM AUTHOR]

To investigate the impact response and energy absorption performance of thin-walled square paper tube under axial impact, dynamic impact and quasi-static compression tests were carried out by drop hammer testing machine and universal material testing machine. The square paper tube has a similar progressive crushing collapse mode in dynamic impact test and quasi-static compression test. The test results show that the specific energy absorption and energy absorption capacity per unit volume of the square paper tube are related to the side length and wall thickness ratio (c/h) of the tube. With the increase of c/h, specific energy absorption and volumetric energy absorption capability of the paper tube decrease rapidly. Furthermore, the relationship between the crushing force and the impact velocity during the impact process is analyzed. Finally, a theoretical model of energy absorption performance of the square paper tube under axial impact is proposed, which has a good correlation with the test results. The proposed model can contribute to the application of paper tube to the design of impact protection structure. [ABSTRACT FROM AUTHOR]

The porous characteristic of tlie paper substrate causes penetration and difusion of tlie li(_uid material on the surface. Therefore，it is extremely difficult to form an RFIDtag metal antenna by electroless deposition on the surface of the paper substrate. Aiming at this problem，the stannous chloride colloid solution \as applied to avoid the catalytic ink penetration in the paper - based substrate. Moreover， paper substrate was immersed in chitosan solu- tion， which could bring functional group and improve the conductivity and adhesion of RFID metal antenna. The SEM，XRD，EDS and adhesion test of the metal layer antenna of the RFID tag proved that the surface of the metal layer of tlie tag antenna had advantages including dense surface， high crystallinity， good adhesion， low resistivity (2.58X10-8 # + cm)，good mechanical properties (1000 bending test). [ABSTRACT FROM AUTHOR]

In order to solve the problems of the current art circulation information is not transparent and the centralized trading authority is asymmetric, this paper proposed a art blockchain certificate traceability model based on three chains. First, in view of the large amount of data in a single piece of artwork information, this paper proposed a blockchain-based symmetric searchable encryption algorithm, and used the interplanetary file system to securely store artwork circulation records on-chain and off-chain. Secondly, for the characteristics of the increasing effective data of artwork information, this paper proposed a blockchain-based inverted fast query and traceability algorithm to help data users realize fast traceability and positioning. At the same time, this paper proposed for the first time that the false information alliance chain stores false art circulation records to realize the processing of false information. Finally, experiments verify the feasibility of the model for big data security storage and fast query traceability. Experiments show that the model is feasible and the query method is efficient. [ABSTRACT FROM AUTHOR]

Background-- With thc vigorous devctopmcnt of China's financiat indiistry, it is of great significance to stiidy thc impact of financing constraints on the qiiatitv of paper pindncts exported. ⑵ Methods-- Based on thc data of export qiiantity and cxport price in thc CEP11 BAC1, with post-rcverse mcthod, thc qiiatitv of China's paper prodncts exported in 2002-2016 is measured and thc characteristics of qiiatitv change arc anatyzed. In addition, a regression modet is cstattishcd to stiidv the impact of financing constraints on the qiiatitv of China's paper products exported. (8)Results-- It can be seen from meastirement rcsutts that the qiiatitv of China's paper prodncts exported has dectined stighttv, from 0. 581 in 2002 to 0. 573 in 2016, due to the stmcttirat change of China's paper export destinations. Fmm 2002 to 2010，the qiiatitv of paper prodncts exported shows a downward trend. In 2010 -2016, with the graduat recovery of the wortd economy, the qiiatitv of paper prodncts exported has graduatty increased ,biit it stitt faits to reach a high tevet. Prom thc regression rcsutts on thc impact of financing constraints on thc qiiatitv of paper prodncts exported, it's found that both internat and cxtcrnat financing constraints have an impact on the qiiatitv of paper prodncts exported. From the pcrspcctivc of externat financing, the impact of bank toan index variabtes on thc qiiatitv of exported paper prodncts is positivc, and thc regression cocfricicnt is 0. 194. The impact of commerciat credit constraint index variabtes on thc qiiatitv of paper prodncts exported is not significant, which shows that for cnteiprises, the source of bank credit funds is more stabtc, the targer thc scate of funds avaitabte，thc tonger the period of funds avaitabte, and a stabtc source of funds is more conducive to promo ting tcchnotogv research and devctopmcnt and improving thc qiiatitv of enterprises. From thc pcrspcctivc of in- tcrnat financing, thc impact of cash ftow index on the qiiatitv of paper pindiicts exported is positivc, with a regression cocfricicnt is 0. 132. The effect of thc paid in capitat indicator variabtes on the qnatity of China's paper prodncts exported is not significant. In addition, China's per capita income, per capita income of cxport destinations ,tabor costs, and R&D investmcnt att have significanttv promo ted the qiiatitv of China's exported paper pmdncts. The regression cocfficicnts arc 0. 314, 0. 149, 0. 387 and 0. 051, rcspcctivety. Finatty, foreign direct investmcnt has no significant impact on thc qiiatitv of Chinese paper prodncts exported. (4)Conclusions and Discussions-- In order to improve thc qiiatitv of cxport paper prodncts，thc government shoutd speed up the cons tine tion of the banking system and transform the financiat system dominated by statc-owned banks, Additionattv, we shoutd encourage the devctopmcnt of smatt and medium-sized banks, devetop the securities market and buitd a mutti-tevet financiat market system, so as to broaden thc financing channets for paper prodncts enterprises and creatc a good financiat envimnment. In addition, financiat ins ti tti tions shoutd continnc to innovate financiat prodncts, combining with the business modet of paper prodncts indnstrv and thc characteristics of different business tinks, and imptcment diffcrentiatcd financing methods. Besides, paper prodncts enterprises shoutd buitd an information sharing ptatform to improve the qiiatitv of information disctosure ,rcdtice financing costs and improve financing efficiency. What/s more, paper prodncts enterprises shoutd improve their credit tevet, strengthen thc management of tcadci's. Finatly, enterprises should increase technologv investmcnt, pay attention to tcchnologv research and devctopmcnt, and improve pindiict tcchnologv level. [ABSTRACT FROM AUTHOR]