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Asymmetric Synthesis and Antitumor Activity of Spiro- Oxadiazole Derivatives from 1,4：3,6-Dianhydro-D-fructose

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Chinese Journal of Chemistry 2017年第9期35卷 1437-1444页

作者： Wenke Xu Yongxun Ge Yu Hou yingju liu Yingchun Hua Weiwei Han Zhiyan Qin Fengwu liu School of Pharmaceutical Sciences Zhengzhou University Zhengzhou Henan 450001 China Collaborative Innovation Center of Henan New Drug Research and Safety Evaluation Zhengzhou Henan 450001 China Zhengzhou Central Hospital Affiliated to Zhengzhou University Zhengzhou Henan 450007 China Oepartment of Medicine Kaifeng University Kaifeng Henan 475000 China

一系列 spiro-oxadiazoles 经由立体声从 1,4:3,6-dianhydro-D-fructose 和一种肺结核特效药被综合 -- 选择二拍子的圆舞反应顺序。最新综合的混合物的结构被建立由光谱分析。复合 2a 的绝对配置被单个水晶 X 光检查分析进一步证实。所... 详细信息

一系列 spiro-oxadiazoles 经由立体声从 1,4:3,6-dianhydro-D-fructose 和一种肺结核特效药被综合 -- 选择二拍子的圆舞反应顺序。最新综合的混合物的结构被建立由光谱分析。复合 2a 的绝对配置被单个水晶 X 光检查分析进一步证实。所有综合混合物被屏蔽为他们的在里面 vitro antitumor 活动，证明这些混合物对 A549 举办差的禁止的活动， MGC-803 肿瘤房间。

关键词：体外抗肿瘤活性不对称合成螺环衍生物合成化合物 e唑光谱分析法 X射线分析

Photoreduction of CO_2 to methanol over Bi_2S_3/CdS photocatalyst under visible light irradiation

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Journal of Natural Gas Chemistry 2011年第4期20卷 413-417页

作者： Xin Li Juntao Chen Huiling Li Jingtian Li Yitao Xu yingju liu Jiarong Zhou The Guangdong Provincial Laboratory of Green Chemical Technology School of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510641 Guangdong China Institute of Biomaterial College of ScienceSouth China Agricultural University Guangzhou 510642 Guangdong China

The Bi 2 S 3 , CdS and Bi 2 S 3 /CdS photocatalysts were prepared by direct reactions between their corresponding salt and thiourea in a hydrothermal autoclave. The photocatalytic activities of these photocatalysts for reducing CO 2 to CH 3 OH under visible light irradiation have been investigated. The results show that the photocatalytic activity and visible light response of Bi 2 S 3 are higher than those of CdS. The Bi 2 S 3 modification can enhance the photocatalytic activity and visible light response of CdS. The photocatalytic activity of Bi 2 S 3 /CdS hetero-junction photocatalyst was the highest and the highest yields of methanol was 613 μmol/g when the weight proportion of Bi 2 S 3 to CdS was 15%, which was about three times as large as that of CdS or two times of that of Bi 2 S 3 .

关键词： photocatalytic reduction carbon dioxide heterogeneous catalysts CdS Bi2S3 CO2 reduction

一种多孔氮掺杂生物炭的制备及对四环素吸附性能--创新型实验设计

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化学通报 2024年第4期87卷 499-505页

作者：张声森许传毅高琼芝刘英菊杨乐敏倪春林华南农业大学生物基材料与能源教育部重点实验室材料与能源学院广州510642

为了拓展农业院校应用化学和材料化学专业高年级学生的学科视野,提高化学实验课程的高阶性、创新性和挑战度,通过科教融合,设计了一个创新性实验—利用汉麻废弃物制备多孔氮掺杂生物炭及对四环素吸附性能。实验内容包括氮掺杂多孔生物... 详细信息

为了拓展农业院校应用化学和材料化学专业高年级学生的学科视野,提高化学实验课程的高阶性、创新性和挑战度,通过科教融合,设计了一个创新性实验—利用汉麻废弃物制备多孔氮掺杂生物炭及对四环素吸附性能。实验内容包括氮掺杂多孔生物炭的制备、形貌结构和性质表征、吸附性能和稳定性的测试以及吸附动力学拟合与机理探索等。该实验具有化学、材料学与农业科学和生物科学相结合的特点,创新性强、操作简便,可供同类高校的同行借鉴。将农林废弃物的回收利用的科研成果应用于教学实践,可以突出专业特色,提升化学类专业学生的科技创新思维、环境保护意识和综合实践能力。

关键词：汉麻废弃物吸附材料多孔生物炭有机污染物创新实验教学

Directly Regioselective Protection of Secondary Hydroxyl Group on Ribosides in Aqueous Solution

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Chinese Journal of Chemistry 2013年第6期31卷 855-860页

作者： Ruigang Xu Fei liu yingju liu Beiqing Chen Feng-Wu liu School of Pharmaceutical Sciences Zhengzhou University Zhengzhou Henan 45000l China

包括 N 核糖甙， O 核糖甙和 2-deoxy-N-riboside 的各种各样的核糖甙的糖一半上的第二等的氢氧根的选择 benzoylation 被在水的 CH3CN 使用 benzoyl 氯化物和 Na2CO3 调查。benzoylation 的选择上的 aglycone 和糖一半的影响也被讨论。... 详细信息

包括 N 核糖甙， O 核糖甙和 2-deoxy-N-riboside 的各种各样的核糖甙的糖一半上的第二等的氢氧根的选择 benzoylation 被在水的 CH3CN 使用 benzoyl 氯化物和 Na2CO3 调查。benzoylation 的选择上的 aglycone 和糖一半的影响也被讨论。为 2,3-O-dibenzoylnucleosides 的准备的一个很有效的方法被开发。

关键词：水溶液选择性保护核苷羟基苯甲酰化苯甲酰氯碳酸钠糖苷

针对性心理护理对减轻耳鼻喉部手术患者术后疼痛程度的效果分析

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中国医学文摘（耳鼻咽喉科学） 2023年第6期38卷 208-210页

作者：刘英菊吉林省一汽总医院吉林长春130011

目的针对性心理护理对减轻耳鼻喉部手术患者术后疼痛程度的效果。方法选取我院收治的耳鼻喉部手术患者90例,随机分为观察组、参照组,各45例。参照组实施常规护理,观察组在参照组的基础上应用针对性心理护理。对比护理效果。结果观察组SA... 详细信息

目的针对性心理护理对减轻耳鼻喉部手术患者术后疼痛程度的效果。方法选取我院收治的耳鼻喉部手术患者90例,随机分为观察组、参照组,各45例。参照组实施常规护理,观察组在参照组的基础上应用针对性心理护理。对比护理效果。结果观察组SAS评分(49.65±5.42)分,优于参照组(53.67±6.11)分,差异明显(P<0.05);观察组VAS评分(2.94±1.64)分,优于参照组(4.05±1.31)分,差异明显(P<0.05);观察组PSQI评分(9.42±1.77)分,优于参照组(15.67±2.52)分,差异明显(P<0.05);观察组满意度95.56%,高于参照组80.00%,差异明显(P<0.05)。结论针对性心理护理可以在患者护理中发挥重要作用。

关键词：针对性心理护理耳鼻喉部手术疼痛程度心理状态

Effectiveness and safety of acupuncture in treatment of pregnancyrelated symptoms:a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第1期44卷 16-26页

作者： liu Tingting liu Tongou liu Mingfu School of Traditional Chinese Medicine Clinical Medicine Hubei University of Traditional Chinese MedicineWuhan 430000China First Clinical College of Hubei University of Traditional Chinese Medicine Wuhan 430000China Department of Acupuncture and Tuina Affiliated Hospital of Hubei University of Traditional Chinese MedicineHubei Provincial Hospital of Traditional Chinese MedicineWuhan 430000China

OBJECTIVE:To systematically evaluate the efficacy and safety of acupuncture(AM)in the treatment of pregnancyrelated symptoms such as acute vomiting during pregnancy.METHODS:We comprehensively searched the available literature up to November 2021,including Pub Med,Embase,Cochrane Library,Chinese Biomedical Literature Database,and China National Knowledge Infrastructure Database,for randomized controlled trials(RCTs)on AM for the treatment of severe vomiting,insomnia,pharyngeal and pelvic pain,mood abnormalities,and dyspepsia during pregnancy.RESULTS:Sixteen RCTs with a cumulative sample size of 1178 cases were included.Of these,964 patients were included in the Meta-analysis.The Meta-analysis results showed that AM was more efficient than Western medicine in treating discomfort during pregnancy[odds ratio(OR)=1.19,95%confidence interval(CI)(1.11,1.28),P<0.01].AM was better than the control group in improving the visual analog scale scores[standard mean difference(SMD)=0.62,95%CI(0.53,0.71),P<0.01].AM was superior to the control group in improving Numerical Rating Scale(NRS)symptom scores[OR=7.31,95%CI(3.36,15.94),P<0.01].There was no significant difference in adverse effects between the AM and sham-AM groups and the analgesic drug group[OR=0.70,95%CI(0.39,1.28),P=0.25],but the treatment and control groups had mild adverse effects with a low incidence.CONCLUSIONS:AM is more effective than other treatments or pharmacotherapy alone in the treatment of pregnancy-related symptoms,and is relatively safe.However,the quality of the included trials was rather poor,and high-quality studies are required to confirm our findings.

关键词： acupuncture pregnancy nausea vomiting sleep initiation and maintenance disorders low back pain pelvic pain mood abnormalities Meta-analysis systematic review

Removal of Cr(Ⅵ)by glutaraldehyde-crosslinked chitosan encapsulating microscale zero-valent iron:Synthesis,mechanism,and longevity

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Journal of Environmental Sciences 2024年第8期142卷 115-128页

作者： Yijun Duan Fang liu Xiang liu Miao Li School of Environment Tsinghua UniversityBeijing 100084China Transportation Institute of Inner Mongolia University Hohhot 010070China

Microscale zero-valent iron(mZVI)has shown great potential for groundwater Cr(Ⅵ)remediation.However,low Cr(Ⅵ)removal capacity caused by passivation restricted the wide use of mZVI.We prepared mZVI/GCS by encapsulating mZVI in a porous glutaraldehydecrosslinked chitosan matrix,and the formation of the passivation layer was alleviated by reducing the contact between zero-valent iron particles.The average pore diameter of mZVI/GCS was 8.775 nm,which confirmed the mesoporous characteristic of this material.Results of batch experiments demonstrated that mZVI/GCS exhibited high Cr(Ⅵ)removal efficiency in a wide range of pH(2-10)and temperature(5-35℃).Common groundwater coexisting ions slightly affected m ZVI/GCS.The material showed great reusability,and the average Cr(Ⅵ)removal efficiency was 90.41%during eight cycles.In this study,we also conducted kinetics and isotherms analysis.Pseudo-second-order model was the most matched kinetics model.The Cr(Ⅵ)adsorption process was fitted by both Langmuir and Freundlich isotherms models,and the maximum Langmuir adsorption capacity of m ZVI/GCS reached243.63 mg/g,which is higher than the adsorption capacities of materials reported in most of the previous studies.Notably,the column capacity for Cr(Ⅵ)removal of a mZVI/GCS-packed column was 6.4 times higher than that of a mZVI-packed column in a 50-day experiment.Therefore,mZVI/GCS with a porous structure effectively relieved passivation problems of mZVI and showed practical application prospects as groundwater Cr(Ⅵ)remediation material with practical application prospects.

关键词： Chitosan Glutaraldehyde mZVI Cr(Ⅵ) Groundwater

Frequency Regulation of VSC-MTDC System with Offshore Wind Farms

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 275-286页

作者： Haoyu liu Chongru liu North China Electric Power University Beijing 102206China

Frequency regulation of voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC)system with offshore wind farms enhances the frequency stability by compensating the power for a disturbed AC system.However,it is difficult to reasonably allocate frequency-regulation resources due to a lack of coordination mechanisms between wind farms and the MTDC system.Moreover,it is difficult for the frequency control of the wind farms to manage changes in wind speed;and the risk of wind-turbine stalls is high.Thus,based on the kinetic energy of wind turbines and the power margin of the converters,the frequency-regulation capability of wind turbines is evaluated,and a dynamic frequency-support scheme considering the real-time frequency-support capability of the wind turbines and system frequency evolution is proposed to improve the frequency-support performance.A power adaptation technique at variable wind speeds is developed;the active power in the frequency-support stage and restoration stage is switched according to the wind speed.A hierarchical zoning frequency-regulation scheme is designed to use the frequency-regulation resources of different links in the MTDC system with wind farms.The simulation results show that the novel frequency-regulation strategy maintains frequency stability with wind-speed changes and avoids multiple frequency dips.

关键词： Wind generation voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC) frequency regulation cooperative control adaptive control variable wind speed

Characteristics and sources of peroxyacetyl nitrate(PAN)in the rural North China Plain:Results from1-year continuous observations

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Journal of Environmental Sciences 2024年第4期138卷 719-731页

作者： Xin liu Xiaowei He Chenglong Zhang Yifei Song Shuyang Xie Chengtang liu Pengfei liu Yuanyuan Zhang Yujing Mu Junfeng liu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Peroxyacetyl nitrate(PAN)is an important photochemical pollutant in the troposphere,whereas long-term measurements are scarce in rural areas in North China Plain(NCP),resulting in unclear seasonal variations and sources of PAN in rural NCP.In this study,we conducted a 1-year observation of PAN during 2021-2022 at the rural NCP site.The average concentrations of PAN were 1.10,0.75,0.65,and 0.88 ppbv in spring,summer,autumn,and winter,respectively,with a 1-year average of 0.81±0.60 ppbv.Calculations indicate that the loss of PAN through thermal decomposition in summer accounts for 43.2% of the total formed PAN,which is an important reason for the low concentration of PAN in summer.We speculate that since the correlation between PAN and O_(3) in winter is significantly lower than that in other seasons,the observed regional transport of PAN cannot be ignored in winter.Through budget analysis,regional transport accounted for 12.8% and 55.9% of the observed PAN on the spring and winter pollution days,respectively,which showed that regional transport played key roles during the photochemical pollution of the rural NCP in winter.The potential source contribution function revealed that the transported PAN mainly comes from southern Hebei in spring.In winter,the transported PAN was mainly from Langfang,Hengshui,and southern Beijing.Our findings may aid in understanding PAN variations in different seasons in rural areas and highlight the impact of regional transport on the PAN budget.

关键词： Photochemical pollution Peroxyacetyl nitrate(PAN) Seasonal variations Regional transport Rural area