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An achievement of the chemistry contest has been successfully transformed into an experimental project with agricultural characteristics, “preparation, characterization and particle size control experiment of nanoemulsion”. It’s introduced into the physical chemistry experiment teaching. Through- the experiment, students can master the preparation and characterization methods of nanoemulsion and study the influence of preparation factors on properties. That can promote the integration and infiltration of agricultural and scientific knowledge, cultivate students’ interdisciplinary thinking and improve their scientific literacy. Students are guided to deeply realize the importance of nanoemulsion in reducing pesticide use and environmental protection and pay attention to the major strategic needs of national food security and food safety. The experiment can strengthen students’ awareness of green development and stimulate their sense of responsibility to serve the national development of agriculture, rural areas and farmers. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology 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.)

为弥补传统无线网络在射频链路难以到达的地方信号接收困难的问题,采用了将光载无线通信（RoF）技术作为一种无线接入方式与正交频分复用（OFDM）无源光网络（PON）有线接入网络相结合的方式,提出了一种基于外调制法单边带（SSB）调制方式承载60 GHz毫米波结合反射式半导体光放大器（RSOA）的有线与无线结合的双向传输系统,并完成了平台的搭建。在此基础上完成了理论分析和实验验证,通过仿真软件Optisystem,对基于RSOA的双向有线及无线混合接入系统背靠背以及光纤传输20 km后的系统性能进行了仿真分析,结果表明:当发送信号采用正交振幅调制（QAM）,4QAM和16QAM两种信号采用SSB调制方式承载毫米波经光纤传输20 km后,接收端系统星座图旋转度和发散度最小,系统性能最好,满足系统传输性能要求。

Copyright of Engineering Science Research & Application is the property of Omniscient Pte. Ltd. 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 & Fermentation Industries is the property of Food & Fermentation Industries 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.)

Traditional chemical synthetic fungicides are easy to affect the environment and ecology, while plant derived fungicides have good ecological compatibility. Extracts of Chinese medicinal materials have good bactericidal effect. Whether extracted with inorganic solvent or organic solvent or plant essential oil, it will show the advantages of small toxic and side effects on organisms other than the target, and will not cause environmental pollution. The extracts of Chinese medicinal materials contain huge antibacterial active ingredients. However, it is relatively rare to use Chinese medicinal material extract as plant source pesticide in actual production. Based on the above contents, the aim is to: the inhibitory effect of extracts of Chinese medicinal materials on plant pathogens; control effect of extracts of Chinese medicinal materials on plant diseases; antibacterial active components in extracts of Chinese medicinal materials; antibacterial mechanism of extracts of Chinese medicinal materials; different angles to fully understand botanical pesticides. These studies will provide important scientific reference for the development of botanical pesticides, promote the application of botanical pesticides in production practice, and achieve the purpose of reducing the use of chemical agents and protecting the ecology. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science 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 Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica 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 Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics 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 Refrigeration is the property of Journal of Refrigeration 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 World Regional Studies is the property of World Regional Studies 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 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 Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control 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 & Fermentation Industries is the property of Food & Fermentation Industries 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 Bulletin of the Chinese Academy of Sciences / Chung-kuo ko Hsueh Yuan Yuan Kan is the property of Institutes of Science & Development, Chinese Academy of Sciences 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 Detergent & Cosmetics is the property of Detergent & Cosmetics 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 Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board 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 Ordnance Equipment Engineering is the property of Chongqing University of Technology 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.)

Shajiang black soil, a typical medium and low yielding soil in the Huaibei plain, has the characteristics of clay weight, dry shrinkage and wet expansion, which are the key factors limiting crop production. Therefore, how to improve the poor moisture properties of shajiang black soil is the key to promote the growth of wheat. A pot experiment was conducted to study the effects of biochar on leaf physiological characteristics, root morphology and soil chemical properties under drought stress. There are four fertilization treatments: T0 (conventional fertilization), T1 (conventional fertilization and 1% biochar), T2 (conventional fertilization and 3% biochar) and T3 (conventional fertilization and 6% biochar), with a drought stress treatment on the 30th day after sowing. Results are as follows. (1) The drought stress treatment significantly increased the H2O2 content, CAT, SOD and POD activities of winter wheat leaves, while the application of biochar significantly reduced the H2O2 content and CAT activity under drought stress, with no significant effect on SOD and POD activities. (2) Drought stress inhibited the root growth of winter wheat, whereas the application of 3% biochar significantly promoted the total root length, total surface area, mean root diameter and total root volume by 48.0% and 34.7%, respectively, compared with no biochar application. The application of 6% biochar treatment significantly promoted the total root length, total surface area, mean root diameter and total root volume of winter wheat under drought stress. (3) The application of 1%, 3% and 6% biochar significantly increased the soil pH and soil organic matter, and the soil organic matter increased with the amount of biochar application. The application of 6% biochar significantly increased the contents of soil available phosphorus and available potassium by 70.3% and 110.5%, respectively, compared with the control. Biochar treatment had no significant effect on soil alkali hydrolysable nitrogen content. The results showed that the application of biochar reduced the accumulation of reactive oxygen species in leaves under drought stress, promoted the root development of winter wheat, and increased the nutrient content of shajiang black soil, thus promoting the growth of winter wheat under drought stress. [ABSTRACT FROM AUTHOR]

In this paper, 134 land contracts from Li nationality in Hainan Province in Qing Dynasty were sorted out and analyzed. These contract documents were classified into white deed and red deed, whose materials can be divided into bamboo and paper. The contract documents included the transactions of folk fields and garden land, tenant lease, etc., reflecting factors such as the source of the trading industry and the reasons for sale. This provides valuable physical data for the study of the economic and social development of the Li nationality area in Hainan in the Qing Dynasty [ABSTRACT FROM AUTHOR]

Schizophrenia is a complex and severe mental disorder, the precise cause of which remains unknown. Circular RNA (circRNA), a type of non-coding RNA with a loop-like structure, is abundant in eukaryotic cell transcriptomes. Recent advancements in molecular genetics have allowed researchers to gain a better understanding of circRNA′s expression profile and biological functions. These molecules play critical roles in various biological processes, including regulation of gene expression, synaptic plasticity, and cognitive flexibility. Due to its high concentration in the mammalian brain, circRNA is involved in neurodevelopment and the maintenance of neural function. Changes in circRNA levels, both within and outside of cells, have been linked to numerous neuro-psychiatric disorders, including schizophrenia. As such, circRNA has a crucial and distinctive function in neuro-psychiatric disorders. Given its characteristics, biological functions, and regulatory roles in diseases, researchers are exploring the abnormal expression of circRNA in schizophrenia and its connection to the onset and progression of the disease. Among them, exosomal circRNA, due to its high stability, disease specificity, and abundant content, is poised to become a potential biological marker for diagnosing schizophrenia. This article provides an extensive overview of the recent circRNA and schizophrenia research, discussing the possibility of using exosomal circRNA as a diagnostic biomarker and therapeutic target for schizophrenia. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Bioprocess Engineering is the property of Chinese Journal of Bioprocess 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.)

Copyright of Journal of Shanghai Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University 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 Water Conservancy & Electric Power Technology & Application is the property of Omniscient Pte. Ltd. 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 Shipin Kexue/ Food Science is the property of Food Science 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 Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute 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 Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment 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 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.)

BACKGROUND: Critical metal elements are a group of metal elements including rare metal elements (e.g., Li, Be, Rb, Cs, Nb, Ta, Zr, Hf, W), rare earth elements (REEs), rare disperse elements (e.g., Ga, Ge, Se, Cd, In, Te, Re, Tl) and rare precious elements (e.g., PGE, Cr and Co), which are important for the development of emerging industries. In recent years, the critical metal elements have shown great economic characteristics in emerging industries such as advanced materials, new energy resources and national defense and military industry uses, which is important strategic significance for the development of the national economy and technology. Therefore, it is necessary to investigate the geochemical properties and metallogenic mechanism of critical metal elements. How to accurately determine trace elements in geological materials is a prerequisite for these investigations. Critical metal elements in geological materials can be determined by conventional chemical wet digestion methods. However, chemical wet digestion methods can only obtain an average chemical composition without spatial distribution information of critical metal elements. Compared to digestion methods, in situ microanalysis technology can obtain micrometer scale elemental distribution in silicate minerals, omit tedious chemical processing processes and avoid the use of a large amount of chemical reagents. However, the abundance of critical metal elements in the crust is low (μg/g level) and the carrier minerals containing critical metal elements are at the micrometer scale. Therefore, it is necessary to establish a high spatial resolution in situ analysis technique to determine trace elements in geological materials. OBJECTIVES: To improve sensitivity of LA-ICP-MS for the determination of critical metal elements (ng/g-μg/g level) in silicate minerals by high-frequency ablation mode combined with Ar-N2 mixed plasma technique. METHODS: Experiments were carried out using a single collector ICP-MS (Element XR Thermo Fisher Scientific, Bremen, Germany) in combination with a 193nm excimer laser ablation system (GeoLas 2005, Lambda Physik, Göttingen, Germany) at the Ministry of Natural Resources Key Laboratory of Gold Mineralization Processes and Resources Utilization. The X skimmer cone was used to improve sensitivity of ICP-MS. To obtain high sensitivity and reduce oxide interference, a small amount (0-10mL/min) of nitrogen was added into the carried gas, downstream from the ablation cell by a T junction. The ablation frequency was 5Hz or 20Hz. The ablation spot size was 10-24μm. Each measurement consisted of 18s of acquisition of the background signal, followed by 10s ablation signal acquisition. The washing time was 20s between each measurement. The standard reference materials NIST 610, NIST612 and NIST614 were used as calibration standards. The comparison of signal intensity, sensitivity, oxide yield and U/Th ratio in LA-ICP-MS were investigated at low and high frequency ablation modes in Ar plasma or Ar-N2 mixed plasma. Before testing, the signal of 232Th and 238U were higher than 1×106 cps when ablating NIST 612 at 24μm. Moreover, U/Th was close to 1 and ThO+ /Th+ was lower than 0.5%. At optimum condition, an in situ elemental quantitative method with high spatial resolution (10-24μm) was established to determine 42 trace elements in MPI-DING and USGS silicate glass reference materials. RESULTS: Sensitivity in LA-ICP-MS is the primary factor for the elemental quantitative analysis with high spatial resolution. Compared to Ar plasma, sensitivities of most elements were improved by a factor of 1.5-9 when using ArN2 mixed plasma at high-frequency (20Hz) ablation mode. In LA-ICP-MS analysis, analytical results can be influenced by oxide yield and elemental fractionation. When using X skimmer cone in SF-ICP-MS, the oxide yield and elemental fractionation was significantly reduced in Ar-N2 mixed plasma at high-frequency (20Hz) ablation mode. There was a wide range of carrier flow rate (0.9-1.075L/min) for obtaining good analysis conditions (ThO+ /Th+ <0.5% and U/Th=1). The limits of detection for 30 trace elements were lower than 0.02μg/g when blation spot and ablation frequency were at 24μm and 20Hz, respectively. At optimum conditions (ablation spot 10- 24μm and ablation frequency 20Hz), 42 trace elements in MPI-DING and USGS silicate glass reference materials were analyzed by LA-ICP-MS in Ar-N2 mixed plasma. The accuracy of analytical results for 34 trace elements was better than 10% and the precision was better than 15%, which suggested high-frequency ablation mode combined with Ar-N2 mixed plasma technique can be used to achieve the determination of critical metal elements (ng/g-μg/g level) in silicate minerals with high spatial resolution. CONCLUSIONS: Compared to low-frequency ablation mode, high-frequency ablation mode combined with Ar-N2 mixed plasma technique can improve sensitivity and reduce oxide yield and elemental fractionation. Moreover, the analysis time of high-frequency ablation mode is very short, which can improve the analysis efficiency of LA-ICPMS. Due to the high sensitivity and high spatial resolution of LA-ICP-MS at high-frequency ablation mode, LA-ICPMS can be applied to quantify trace elements and complex internal chemical compositions in micrometer level minerals, such as distribution of trace elements in mineral growth zones. Furthermore, this high-frequency ablation mode may also be applied to the development of in situ accessory mineral dating and isotope ratio analysis. [ABSTRACT FROM AUTHOR]

BACKGROUND: Knowledge of the chemical composition of whole-rock geological samples is the basic work of geochemical research. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) has become the most powerful tools of elemental analysis as its advantages of direct solid sampling, avoiding the cumbersome wet chemical digestion process of traditional analytical techniques, low-pollution and low-consumption and high-efficiency. However, the small sample volume of laser ablation cannot represent the chemical composition of complex and inhomogeneous samples, resulting in poor analytical precision and accuracy, which hinders its application in whole-rock bulk analysis. It is critical to prepare complex whole-rock geological samples into homogeneous and stable sample targets. OBJECTIVES: To establish a green and efficient pretreatment technique for LA-ICP-MS whole rock analysis of complex geological samples. METHODS: The samples were first calcined at 1000-1100℃ to remove volatiles, pressed into pellets, and then melted by high-energy wide pulse width infrared laser irradiation to finally obtain a homogeneous and stable sample glass. RESULTS: Compared with pressed powder pellets, the new sample preparation procurement improved the analytical precision of each element in marine sediments GBW07354 and GBW07356 by an average of 7.7 times and 3.9 times, respectively. The deviation between the measured values and reference values of most elements in marine sediment samples was within 10%; the deviation between the measured values and reference values of most major elements, REEs, and other trace elements in soil composition standards was within 5%, 20%, and 15%, respectively; the number of elements measured in bauxite samples reached 40, and the compositions of Sc and W elements were given for the first time. CONCLUSIONS: Rapid and accurate analysis of major and trace elements in marine sediment, soil, and bauxite standard samples has been determined through the optimized pretreatment technique. The sample preparation procurement established in this paper allows the LA-ICP-MS technique to be directly and better applied to the elemental analysis of complex geological whole rock samples, further improving the efficiency of major and trace element analysis in geological samples. [ABSTRACT FROM AUTHOR]

As one of the important embodiments of intelligent finance, intelligent trading based on trading software is booming in the domestic financial market, significantly improving the efficiency of financial transactions. However, there are various types of intelligent trading software, and the design ideas and algorithm complexity of the trading strategies involved are diverse, leading to abnormal trading and non-compliance risks. Currently, the work of anomaly detection for intelligent trading behavior has not been fully developed. Therefore, aiming at the complexity and professionalism of the trading scenario, a method combining deep learning implicit representation learning and rule tree model explicit rule learning is proposed to model the timeliness and compliance of the trading data respectively. To verify the effectiveness of the proposed method, it has been compared with some representative benchmark methods in multiple scenarios such as stocks and futures, and the best performance has been achieved. In addition, further analysis of the model has been conducted to verify the impact of different features on the effectiveness of abnormal detection. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Preventive Veterinary Medicine / Zhongguo Yufang Shouyi Xuebao is the property of Chinese Journal of Preventive Veterinary Medicine 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 Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials 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.)

Copyright of South Architecture / Nanfang Jianzhu is the property of South Architecture 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.)

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Copyright of Chinese Journal of High Pressure Physics is the property of Chinese Journal of High Pressure Physics 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.)