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Study on chemical constituents and biological activities of Sanghuangporus vaninii under static magnetic field

分子科学学报 2024年第4期40卷 353-357页

作者： liu xuwen ZHOU Jie YE Dongyan LI Qianhui YIN Shuren ZHANG Suyi BAI Helong College of Chemistry Changchun Normal UniversityChangchun 130032China

The chemical composition and biological activity of Sanghuangporus vaninii solid culture treated by static magnetic field were *** compounds were isolated and purified using ultrasonic extraction and semi-preparative liquid *** structures were identified through spectral data,and the inhibitory activities againstα-amylase,α-glucosidase and pancreatic lipase were *** compounds,5,7-dihydroxy-3,4'-dimethoxyflavone(1),D-(+)-Trehalose(2),pinolenic acid(3),were extracted from the petroleum ether *** of peak heights indicated a significantly higher content of compounds subjected to a 4 mT static magnetic field compared to those *** tests revealed that compounds 1 and 2 exhibited strong anti-α-amylase and anti-α-glucosidase ***,compound 1 had inhibition rates of(65.37±0.05)%and(73.81±0.12)%after 4 mT treatment,compared to(57.26±0.11)%and(65.33±0.14)%*** 2 showed inhibition rates of(68.61±0.12)%and(65.38±0.09)%with the magnetic field,versus(60.71±0.06)%and(56.18±0.02)%*** 3 displayed a notable inhibitory effect on pancreatic lipase,with rates of(60.83±0.03)%after 4 mT treatment and(53.77±0.09)%*** study demonstrates that the static magnetic field enhances the chemical content and bioactivity of Sanghuangporus vaninii solid culture,providing a basis for its further development and application.

关键词： Sanghuangporus vaninii chemical component static magnetic field α-amylase α-glucosidase pancreatic lipase

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大黄复方保留灌肠治疗继发性胃肠功能障碍疗效的Meta分析

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中国中医急症 2024年第12期33卷 2074-2081页

作者：闫婷史英杨薪博刘金响马小兵刘新阳刘旭雯陕西中医药大学陕西咸阳712046 陕西中医药大学第二附属医院陕西咸阳712000

目的评价大黄复方保留灌肠治疗继发性胃肠功能障碍的疗效。方法通过计算机检索中国知网(CNKI)、万方医学(WF)、中文科技期刊数据库(VIP)、中国生物医学(CBM)、PubMed、EMbase、Cochrane Library,检索数据库时限为建库至2024年6月20日,... 详细信息

目的评价大黄复方保留灌肠治疗继发性胃肠功能障碍的疗效。方法通过计算机检索中国知网(CNKI)、万方医学(WF)、中文科技期刊数据库(VIP)、中国生物医学(CBM)、PubMed、EMbase、Cochrane Library,检索数据库时限为建库至2024年6月20日,依据纳排标准筛选文献,运用Cochrane偏倚风险评估工具评价纳入文献质量,采用Revman5.4进行Meta分析。结果共纳入15项随机对照研究、688例患者,结果显示,与西医常规治疗相比,在临床总有效率、胃肠功能障碍评分、急性生理与慢性健康量表(APACHEⅡ)评分、中医证候评分、肠鸣音恢复时间、首次排气时间、首次排便时间、腹痛、腹胀缓解时间、C反应蛋白(CRP)水平、降钙素原(PCT)水平、白细胞计数(WBC)水平、肿瘤坏死因子-α(TNF-α)水平、白细胞介素-6(IL-6)水平、D-乳酸(D-Lac)、胺氧化酶(DAO)、腹内压(IAP)、血清胃动素(MTL)、28 d病死率、多器官功能障碍综合征(MODS)发生率方面,含传统中药大黄复方保留灌肠能更加有效地治疗继发性胃肠功能障碍。结论采用大黄复方保留灌肠可有效提高治疗继发性胃肠功能障碍临床疗效。

关键词：胃肠功能障碍大黄复方保留灌肠继发性 Meta分析

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基于改进Critic-G1算法的发电商市场力综合评价方法

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中国电力 2021年第11期54卷 59-67页

作者：李雪松蒋宇刘胥雯王阳丁羽江苏电力交易中心有限公司江苏南京210008

电力市场领域中,发电商市场力的存在会导致电力资源配置效率低下,损害社会福利,降低市场竞争效率。对发电商行使市场力的行为方式进行分析,建立发电商市场力风险评估指标体系,并应用改进Critic-G1组合赋权法对某地区发电商市场力风险进... 详细信息

电力市场领域中,发电商市场力的存在会导致电力资源配置效率低下,损害社会福利,降低市场竞争效率。对发电商行使市场力的行为方式进行分析,建立发电商市场力风险评估指标体系,并应用改进Critic-G1组合赋权法对某地区发电商市场力风险进行综合评价。算例结果表明,该地区发电商市场力水平各异。所提方法已在华东某省电力市场得到了实际应用并取得良好的效果,可为其他地区市场运营机构有效识别发电商市场力风险提供一定的依据及参考。

关键词：风险评估发电商市场力改进Critic法 G1法组合赋权法

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基于FAHP的电力市场管理委员会履职评价体系

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水利经济 2022年第5期40卷 86-92,96页

作者：高博刘胥雯蒋宇田明国网江苏省电力有限公司江苏南京210024 江苏电力交易中心有限公司江苏南京210008

为解决我国电力市场管理委员会成员单位在履职时政策学习不及时、责任意识缺乏、履职行为滞后、履职成果不显著等问题,提升电力市场管理委员会运行效率,促进电力市场持续发展,采用层次分析法和模糊综合评价法相结合的方法,从履职政策、... 详细信息

为解决我国电力市场管理委员会成员单位在履职时政策学习不及时、责任意识缺乏、履职行为滞后、履职成果不显著等问题,提升电力市场管理委员会运行效率,促进电力市场持续发展,采用层次分析法和模糊综合评价法相结合的方法,从履职政策、履职能力、履职行为、履职成效四维度构建了电力市场管理委员会成员单位履职评价体系,并应用于分析某省电力市场管理委员会成员单位履职水平,根据评价结果提出了完善电力市场管理委员会成员单位履职评价体系建设、强化成员单位责任意识、健全我国电力市场监管体系等建议。

关键词：电力市场管理履职评价层次分析法模糊综合评价法

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Comparison and analysis of fecal components in Blaptica dubia and Blatta lateralis

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分子科学学报 2024年第6期40卷 546-551页

作者： ZHOU Jie liu xuwen YE Dongyan LI Qianhui YIN Shuren ZHANG Suyi ZHOU Zhihan WANG Jing liu Lijuan BAI Helong College of Chemistry Changchun Normal UniversityChangchun 130032China Technical Innovation Laboratory for Research and Development of Economic Plants and Edible Mushroomsand Medicinal Mushrooms in Cold Regions of Jilin ProvinceChangchun 130032China Changchun Guoxin Modern Agricultural Science and Technology Development Co. Ltd.Changchun 130600China

The fecal components of Blaptica dubia and Blatta lateralis were analyzed and characterized using solid-phase microextraction-gas chromatography-mass spectrometry(SPME-GC-MS)to explore can-didate compounds mediating their aggregation *** results revealed that hydrocarbons and alde-hydes accounted for the majority of the 85 components detected in the fecula of ***,with hexadecane(6.721%)and tetradecanal(6.555%)as the most *** the fecula of ***,esters and hy-drocarbons accounted for the majority of the 93 identified components,with 3-phenylpropionic acid methyl ester(10.020%)and 2,7-dioxa-tricyclo[4.4.0.0(3,8)]deca-4,9-diene(3.604%)hexadecane(2.504%)*** fecal compositions of the two cockroach species exhibited similarities,with seven common substances identified out of a total of *** relative percentages of these common components in the fecula were 68.516%for *** and 53.541%for ***.

关键词： Blaptica dubia Blatta lateralis fecal component SPME-GC-MS aggregation pheromone

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The model updating based on near infrared spectroscopy for the sex identification of silkworm pupae from different varieties by a semi-supervised learning with pre-labeling method

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SPECTROSCOPY LETTERS 2019年第10期52卷 642-652页

作者： Xie Lin Yang Zhuang Tao Dan Li Guanglin Yang Xiaodong Song Jie liu xuwen Southwest Univ Coll Engn & Technol Chongqing 400716 Peoples R China

It is effective to accurately discriminate the sex of silkworm pupae with the same varieties based on near infrared spectroscopy. However, when the model is promoted to classify new varieties of silkworm pupae, the model's performance becomes worse, due to the cultivation environment and varieties changing. In the aims of improving the generalization ability and accuracy of the model, this paper proposed a model updating strategy based on semi-supervised learning. First, support vector machine identification model was built after the original spectra was pretreated by Savitzky-Golay convolution smoothing operation, which could effectively reduce spectra noise. Then, the support vector machine model gave the pre-labelings of unlabeled silkworm pupae in the updated set, which were divided into male samples and female samples. According to the correlation coefficients that calculated by Pearson correlation coefficient and Euclidean distance, a total of 8 reliable samples were selected from the male and female samples, respectively. The reliable samples were added to the original training set to update the original model. Finally, the updated model was used to test the test sets from the varieties of silkworm pupae that were the same with updated *** results showed the performance of the non-updated model for silkworm pupae from the three new varieties just reached 54.55%, 68.52%, 86.84%, respectively. The support vector machine model updated by using Pearson correlation coefficient improved the accuracy to 100%, 96.30%, 97.37%, and the model updated by Euclidean distance increased the identification accuracy of the three varieties that were not involved in the modeling to 100%, 75.93%, 92.10% respectively. The results showed that the performance of the model updated by Pearson correlation coefficient was better than Euclidean distance. The results revealed that the method based on semi-supervised learning could effectively solve the problem of poor universality fo

关键词： Model updating near-infrared spectroscopy semi-supervised learning sex discrimination silkworm pupae

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经皮冠状动脉介入治疗前早期静脉注射兰地洛尔对ST段抬高型心肌梗死患者心肌挽救的有效性和安全性

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中国实用医刊 2022年第7期49卷 106-108页

作者：雒瑞军宋晓健刘旭文山西省心血管病医院急诊科太原030024

目的探讨经皮冠状动脉介入治疗前早期静脉注射兰地洛尔对ST段抬高型心肌梗死患者心肌挽救的有效性和安全性。方法抽取2019年3月至2020年3月于山西省心血管病医院接受治疗的200例被诊断为ST段抬高型心肌梗死并具有完整随访记录的患者,依... 详细信息

目的探讨经皮冠状动脉介入治疗前早期静脉注射兰地洛尔对ST段抬高型心肌梗死患者心肌挽救的有效性和安全性。方法抽取2019年3月至2020年3月于山西省心血管病医院接受治疗的200例被诊断为ST段抬高型心肌梗死并具有完整随访记录的患者,依据双盲法分为观察组与对照组,每组100例。观察组静脉注射兰地洛尔,对照组静脉注射生理氯化钠溶液。比较两组心肌挽救指数值及其他磁共振成像数据结果。结果观察组心肌挽救指数为(42.95±7.81)%,高于对照组的(32.75±10.38)%,P<0.05。两组左心室质量、风险心肌质量、梗死心肌质量和左室心肌梗死比例比较差异均未见统计学意义(P均>0.05)。结论经皮冠状动脉介入治疗前早期静脉注射兰地洛尔可能会增加ST段抬高型心肌梗死患者的心肌挽救程度,且不会产生额外的血流动力学不良反应。

关键词：心肌梗死兰地洛尔磁共振成像经皮冠状动脉介入治疗

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Energetic Films Realized by Encapsulating Copper Azide in Silicon-Based Carbon Nanotube Arrays with Higher Electrostatic Safety

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MICROMACHINES 2020年第6期11卷 575-575页

作者： liu, xuwen Hu, Yan Wei, Hai Chen, Bingwen Ye, Yinghua Shen, Ruiqi Nanjing Univ Sci & Technol Sch Chem Engn Nanjing 210094 Peoples R China Minist Ind & Informat Technol Micronano Energet Devices Key Lab Nanjing 210094 Peoples R China

Since copper azide (Cu(N-3)(2)) has high electrostatic sensitivity and is difficult to be practically applied, silicon-based Cu(N-3)(2)@carbon nanotubes (CNTs) composite energetic films with higher electrostatic safety were fabricated, which can be compatible with micro-electro mechanical systems (MEMS). First, a silicon-based porous alumina film was prepared by a modified two-step anodic oxidation method. Next, CNTs were grown in pores of the silicon-based porous alumina film by chemical vapor deposition. Then, copper nanoparticles were deposited in CNTs by electrochemical deposition and oxidized to Cu(N-3)(2)by gaseous hydrogen azide. The morphology and composition of the prepared silicon-based Cu(N-3)(2)@CNTs energetic films were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), respectively. The electrostatic sensitivity of the composite energetic film was tested by the Bruceton method. The thermal decomposition kinetics of the composite energetic films were studied by differential scanning calorimetry (DSC). The results show that the exothermic peak of the silicon-based Cu(N-3)(2)@CNTs composite energetic film is at the temperature of 210.95 degrees C, its electrostatic sensitivity is significantly less than that of Cu(N-3)(2)and its 50% ignition energy is about 4.0 mJ. The energetic film shows good electric explosion characteristics and is successfully ignited by laser.

关键词： energetic films composite energetic materials Cu(N-3)(2)@carbon nanotubes (CNTs) electrostatic sensitivity electrochemical deposition

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The Exceptionally High Dielectric Constant of Doped Organic Semiconductors

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ADVANCED ELECTRONIC MATERIALS 2025年第3期11卷

作者： Yang, xuwen liu, Jian Koster, L. Jan Anton Univ Groningen Zernike Inst Adv Mat Nijenborgh 3 NL-9747 AG Groningen Netherlands Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys & Chem Changchun 130022 Jilin Peoples R China

The dielectric constant (epsilon r) is an essential parameter as it characterizes the ability to screen charge. Molecular doping is a key strategy to enhance the electronic properties of organic semiconductors, where again epsilon r is important because the Coulomb attraction introduced by dopants needs to be overcome to generate carriers. Previous theoretical work has reported collective screening can lead to a dramatic enhancement of epsilon r upon doping. Whereas this prediction has been tested in the low-doping regime, the predicted dielectric catastrophe remains unexplored. Here, metal-insulator-semiconductor (MIS) diodes to measure the dielectric constant of organic semiconductors subjected to moderate-to-high doping levels is employed. MIS diodes make it possible to measure the dielectric constant at relatively high doping ratios and corresponding high electrical conductivities. This results demonstrated a notable rise in the dielectric constant within a range of approximate to 3.0-15.0 of n- and p-doped organic semiconductors, resembling the phenomenon of dielectric catastrophe. These observations align with recent theoretical investigations into the impact of molecular doping on epsilon r and show the collective behavior of free charges in doped organic semiconductors. Metal-insulator-semiconductor diodes are used to measure the dielectric constant of organic semiconductors subjected to moderate-to-high doping levels. The results demonstrate a notable rise in the dielectric constant within a range of approximate to 3.0-15.0 of n- and p-doped organic semiconductors, resembling a dielectric catastrophe caused by the collective behavior of free charges. image

关键词： collective screen dielectric constant molecular doping

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Electrochemical determination of methyl parathion based on pillararene@AuNPs@reduced graphene oxide hybrid nanomaterials

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NEW JOURNAL OF CHEMISTRY 2019年第33期43卷 13048-13057页

作者： Hou, Xiaoqian liu, xuwen Li, Zhi Zhang, Jun Dua, Guanben Ran, Xin Yang, Long Southwest Forestry Univ Minist Educ Key Lab Forest Resources Conservat & Utilizat Sou Kunming 650224 Yunnan Peoples R China Southwest Forestry Univ Sch Mat Sci & Engn Sch Chem Engn Kunming 650224 Yunnan Peoples R China Southwest Forestry Univ Yunnan Prov Key Lab Wood Adhes & Glued Prod Kunming 650224 Yunnan Peoples R China

The detection of pesticides has become a very important and critical research area because of the rapid development of agriculture and strict environmental protection regulations. In this paper, a fast and sensitive non-enzymatic electrochemical sensor for methyl parathion (MP) on a glassy carbon electrode (GCE) modified with hydroxylatopillar[5]arene@gold nanoparticles and electrochemical reduced graphene oxide (HCP5@AuNPs-ERGO) hybrid nanomaterials was proposed. The properties of the modified electrode were characterized by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). The experimental parameters such as preconcentration time, preconcentration potential and pH value were optimized. It was found that the improved electrode showed a high detection sensitivity to MP, with a detection range of 0.005 mu M to 30 mu M and a detection limit (LOD) of 0.001 mu M, and other interfering substances had no effect on the detection of MP. In addition, the modified electrode is also used for the detection of MP in actual water samples, showing an efficient sensing capability. The results show that the electrochemical sensor provides a new idea for the trace analysis of MP in agricultural and environmental samples.

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