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国外医学（妇幼保健分册） 2004年第3期15卷 187-189页

作者：岳红梅柳韡泰安市中心医院妇产科山东泰安271000

口服避孕药避孕效果可靠、价廉、可逆 ,但其安全性是人们倍加关心的问题 ,在此 ,对口服避孕药的使用情况进行了流行病学方面及与心血管、与肿瘤疾病等方面关系的系统论述 ,旨在为选择口服避孕药提供科学依据。

关键词：口服避孕药安全性

Engineering atomic Rb-N configurations to tune radical pathways for highly selective photocatalytic H2O2 synthesis coupled with biomass valorization

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Journal of Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye Li Shuang Pan Yihuang Chen Qiong liu College of Chemistry and Materials Engineering Wenzhou University Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction for hydrogen peroxide （H2O2） synthesis presents a green and costeffective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over free radical reaction pathways and minimizing undesirable oxidative ***,we report for the visible light-driven simultaneous co-photocatalytic reduction of O2to H2O2and oxidation of biomass using the atomic rubidium-nitride modified carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of 8.01 mM h-1for H2O2generation and photooxidation rate of 3.75 mM h-1for furfuryl alcohol to furoic acid,achieving a remarkable solar-to-chemical conversion （SCC） efficiency of up to 2.27%.Experimental characterizations and DFT calculation disclosed that the introducing atomic Rb–N configurations allows for the high-selective generation of superoxide radicals while suppressing hydroxyl free radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position for O2adsorption and reinforce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way for efficient synthesis of H2O2coupled with biomass valorization.

关键词： Free radical reactions

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乙酸铅对脑脉络丛Z310细胞毒性作用

中国公共卫生 2012年第9期28卷 1202-1204页

作者：王红梅刘羽刘君丽谭壮生马玲赵超英李国君北京市疾病预防控制中心卫生毒理所 100013 首都医科大学公共卫生与家庭医学学院

目的初步探讨乙酸铅诱导大鼠脑脉络丛Z310细胞的低剂量兴奋作用和高剂量抑制作用。方法以浓度为0、0.000 2、0.002、0.02、0.2、2、20、200、500μmol/L的乙酸铅分别染毒Z310细胞12和24h,用噻唑蓝(MTT)法和2-(2-甲氧基-4-硝苯基)-3-(4-... 详细信息

目的初步探讨乙酸铅诱导大鼠脑脉络丛Z310细胞的低剂量兴奋作用和高剂量抑制作用。方法以浓度为0、0.000 2、0.002、0.02、0.2、2、20、200、500μmol/L的乙酸铅分别染毒Z310细胞12和24h,用噻唑蓝(MTT)法和2-(2-甲氧基-4-硝苯基)-3-(4-硝苯基)-5-(2,4-二磺基苯)-2H-四唑单钠盐(WST-8)法检测细胞生存情况,并观察各剂量组细胞形态变化。结果 0.02μmol/L乙酸铅染毒24 h,MTT法检测Z310细胞存活率为107.06%,0.2μmol/L染毒组24 h时细胞存活率升高为110.91%;>2μmol/L乙酸铅染毒时,细胞存活率随剂量增加而降低;染毒24 h时,200、500μmol/L乙酸铅组细胞存活率(MTT法)分别下降至79.37%和76.81%(P<0.01);染毒12、24 h时,200、500μmol/L乙酸铅组细胞存活率(WST-8法)分别下降至81.67%和72.36%及56.89%和44.05%(P<0.05)。结论低剂量乙酸铅可引起Z310细胞兴奋效应;高剂量乙酸铅引起Z310细胞抑制效应;WST-8法检测细胞存活率较MTT法更敏感。

关键词：乙酸铅 Z310细胞细胞毒性 WST-8法噻唑蓝(MTT)法

Discovery of a new family member of arsenic–vanadium polyoxometalates with high catalytic performance for one-pot coupling of CO2, epoxides and amines

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Tungsten 2025年第1期 80-87页

作者： Fang-Qian Wang Yin Zhang Wei-Wei Wang mei-Qian Fu hong-Bing Mo Wei-Dong Yu Chao liu Jun Yan College of Chemistry and Chemical Engineering Central South University Junior Education Department Changsha Normal University School of Science Hunan University of Technology and Business

Arsenic-vanadium polyoxometalates（POMs） represent a family of tremendous potential catalysts owing to their peculiar physical and chemical *** in CO2conversion,using POMs to catalyze the conversion of CO2and epoxide into chemical intermediates is the research ***,A new family number of arsenic-vanadium POMs,[N（CH3）4]4[As8V12O38（H2O）]·2H2O({As8V12O38}),was reported and characterized by single-crystal X-ray diffraction,fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,*** from other allotropicity,{As8V12O38}shows a different structure pattern with an I-43d *** obtained {As8V12O38} was employed as a catalyst for the *** initial catalytic reaction confirmed that {As8V12O38} can catalyze the formation of epoxy carbonate by using 1.01 kPa CO2and epoxide at 70℃.Furtherly,when added amine in the catalytic system,oxazolidinone could be obtained by high yields,which provides an efficient way to convert CO2into profitable ***,a possible catalytic reaction mechanism was proposed by using different characterization analyses.{As8V12O38} first catalyzes the epoxide and CO2to form an epoxy carbonate and then catalyzes epoxy carbonate and benzylamine into oxazolidinone.

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No-Reference Image Quality Assessment Method Based on Visual Parameters

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Journal of Electronic Science and Technology 2019年第2期17卷 171-184页

作者： Yu-hong liu Kai-Fu Yang hong-mei Yan Key Laboratory for Neuroinformation of Ministry of Education University of Electronic Science and Technology of China Chengdu 610054 China Department of Biomedical Engineering Chengdu Medical College Chengdu 610050 China

Recent studies on no-reference image quality assessment (NR-IQA) methods usually learn to evaluate the image quality by regressing from human subjective scores of the training samples. This study presented an NR-IQA method based on the basic image visual parameters without using human scored image databases in learning. We demonstrated that these features comprised the most basic characteristics for constructing an image and influencing the visual quality of an image. In this paper, the definitions, computational method, and relationships among these visual metrics were described. We subsequently proposed a no-reference assessment function, which was referred to as a visual parameter measurement index (VPMI), based on the integration of these visual metrics to assess image quality. It is established that the maximum of VPMI corresponds to the best quality of the color image. We verified this method using the popular assessment database—image quality assessment database (LIVE), and the results indicated that the proposed method matched better with the subjective assessment of human vision. Compared with other image quality assessment models, it is highly competitive. VPMI has low computational complexity, which makes it promising to implement in real-time image assessment systems.

关键词： Bandwidth human visual system information entropy luminance no-reference image quality assessment (NR-IQA) visual parameter measurement index (VPMI)

Cytoskeleton in Pollen and Pollen Tubes of Ginkgo biloba L.

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Journal of Integrative Plant Biology 2005年第8期47卷 952-958页

作者： Jun-mei liu hong ZHANG Yan LI State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University Beijing 100094 China Department of Horticulture Hebei Agricultural University Baoding 077001 China

The distribution of F-actin and microtubules was investigated in pollen and pollen tubes of Ginkgo biloba L. using a confocal laser scanning microscope after fluorescence and immunofluorescence labeling. A dense F-actin network was found in hydrated Ginkgo pollen. When Ginkgo pollen was germinating, F-actin mesh was found under the plasma membrane from which the pollen tube would emerge. After pollen germination, F-actin bundles were distributed axially in long pollen tubes of G. biloba. Thick F-actin bundles and network were found in the tip of the Ginkgo pollen tube, which is opposite to the results reported for the pollen tubes of some angiosperms and conifers. In addition, a few circular F-actin bundles were found in Ginkgo pollen tubes. Using immunofluorescence labeling, a dense microtubule network was found in hydrated Ginkgo pollen under confocal microscope. In the Ginkgo pollen tube, the microtubules were distributed along the longitudinal axis and extended to the tip. These results suggest that the cytoskeleton may have an essential role in the germination of Ginkgo pollen and tube growth.

关键词： F-actin Ginkgo biloba microtubules pollen tube.

Preparation of Modified Composite Nanofiltration Membrane Synergistically Using Carboxylic Multi- walled Carbon Nanotube and β-cyclodextrin

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 232-239页

作者： liu Peng MAO Junpeng FANG Yanfeng YU Yunwu CHEN Changxiu TANG Ning WAN Ye GU Yaxin liu Yunxue WANG Lihua School of Materials Science and Engineering Shenyang Jianzhu UniversityShenyang 110168China

A new modified blend ultrafiltration(UF)membrane with good hydrophilicity,high porosity and excellent anti-fouling performance was developed by using carboxylic multi-walled carbon nanotube(CMWCNT)as casting solution ***,a composite nanofiltration(NF)membrane with large water flux and good retention rate was fabricated by using the PVDF/CMWCNT blend UF membrane as the substrate,and polyvinyl alcohol(PVA),β-cyclodextrin(β-CD)and polyethylenimine(PEI)as the coating *** results show that with the appropriate addition of CMWCNT in the casting solution,the surface roughness,porosity and recovery rate of the PVDF/CMWCNT blend UF membrane is obviously *** water flux of blend UF membrane is significantly improved when the CMWCNT content increases from 0 wt%to 0.2 wt%.The water flux of blend UF membrane with 0.2 wt%CMWCNT is 162.7 L/(m^(2)·h),which is 44.3%higher than that of the pure PVDF ***β-CD content is 0.8 wt%,the retention rate of Congo red by PVDF/CMWCNT/β-CD composite NF membrane reaches 98.7%,which is 28.3%higher than that of single PVA/PEI modified *** research will provide a new idea and simple method for developing novel high-performance composite NF membranes.

关键词： CMWCNT cyclodextrin nanofiltration membrane

Synthesis,characterization,and theoretical study of N,S-codoped nano-TiO_2 with photocatalytic activities

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 606-614页

作者： hong-tao Gao Yuan-yuan liu Cui-hong Ding Dong-mei Dai Guang-jun liu State Key Laboratory of Crystal materials Shandong University Jinan 250100 China College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 China Department of Chemistry and Chemical Engineering Jining University Qufu 273155 China

Nitrogen and sulfur doped titanium dioxide photocatalysts were prepared by the sol-gel *** products were characterized by X-ray diffraction （XRD）,transmission electron microscopy （TEM）,and UV-visible diffuse reflectance spectra （DRS）.Photocatalytic activities of the samples were investigated on the degradation of methyl orange （MO）.The effect of the dopants on the electronic structure of TiO2 was studied by the first-principles calculations based on the density functional theory （DFT）.The orbital hybridization resulted in energy gap narrowing and electronic delocalization in the crystal of doped *** electrons of varied energetic states could offer enhanced electron transfer,together with optical absorption *** results show that the doping elements of N and S play a cooperative role in the modification of electronic structure,which enhances the photocatalytic *** experimentally observed absorption edges of N-doped TiO2,S-doped TiO2,and N,S-codoped TiO2 are 420,413,and 429 nm,respectively,which can be explained by the theoretical calculation results.

关键词： titanium dioxide doping electronic structure red shift photocatalysis nanoparticles

异烟酸-吡唑啉酮法测定总氰化物时的影响因素

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福建分析测试 2017年第5期26卷 47-48页

作者：路孝梅刘红霞薛春丽德州市环境保护监测中心站山东德州253034

本文主要讨论了异烟酸-吡唑啉酮法测定总氰化物时影响准确度的几个因素。

关键词：测定总氰化物影响因素

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改良的羟基磷灰石义眼座植入术的初步效果

国际眼科杂志 2007年第2期7卷 536-537页

作者：赵建敏王雪燕刘红梅中国湖北省襄樊市中心医院眼科 441021

目的:评价羟基磷灰石义眼座植入术的疗效。方法:对49例(49眼)眼内容物剜除术患者行Ⅰ期或Ⅱ期羟基磷灰石义眼座植入手术。结果:随访5mo～4a的所有患者对外观及义眼活动度满意,无感染、结膜裂开和义眼座暴露等并发症。结论:改良的羟基磷... 详细信息

目的:评价羟基磷灰石义眼座植入术的疗效。方法:对49例(49眼)眼内容物剜除术患者行Ⅰ期或Ⅱ期羟基磷灰石义眼座植入手术。结果:随访5mo～4a的所有患者对外观及义眼活动度满意,无感染、结膜裂开和义眼座暴露等并发症。结论:改良的羟基磷灰石义眼座植入术具有操作简单,对组织损伤小,并发症少等优点,是一种可供选择的手术方式。

关键词：手术方法羟基磷灰石义眼座手术并发症疗效