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Simulation of organic nitrates in Pearl River Delta in 2006 and the chemical impact on ozone production

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Science China Earth Sciences 2018年第2期61卷 228-238页

作者： chen xiaorui WANG HaiChao LU KeDing State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University

Organic nitrates are secondary atmospheric pollutants that play a key role in ozone and aerosol production. This study focused on the simulation of organic nitrates through a box model coupled with RACM2 （Regional Atmospheric Chemistry Mechanism, version 2）, based on data from the PRIDE-PRD2006 campaign in Backgarden, China. Our study found that an overestimation of organic nitrate production rate was generated by the model. Furthermore, the effective production ratio （a^ff） of organic nitrates was around 0.033 after optimizing its chemical production module. The chemical impacts of organic nitrates on ozone production were related to VOC-OH reactivity and aeff. We found that VOC-OH reactivity was positively related to aeff, resulting in the suppression of ozone production caused by organic nitrates, which showed that P（Ox=O3＋NO2） increased initially and subsequently decreased with VOC-OH reactivity. These results highlight the importance of organic nitrate＇s impact on ozone production in strategies to control ozone pollution, specifically regarding the reduction of low-molecular-weight VOCs in the Pearl River Delta.

关键词： Organic nitrates Ozone RACM2 Pearl River Delta

Mutual effects of nitric oxide and iron on the growth of marine algae

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Acta Oceanologica Sinica 2005年第5期24卷 100-109页

作者： LIU Chunying ZHANG Zhengbin chen xiaorui Institute of Marine Chemistry Ocean University of China Qingdao 266003 China

Experiments on the effects of nitric oxide （NO） and iron on the growth of marine microalgae Skeletonema costatum were conducted. The results are as follows： exogenous NO could increase the growth rate of marine algae and raise the biomass remarkably under iron-deficient conditions. But it was a complicated process that the phytoplankton growth was influenced by NO and iron, which was controlled by the NO concentration, the nutrition level of the culture medium and the iron concentration, etc. Meanwhile, the iron concentration in the medium also has a direct influence on the growth and NO release capacity of the algae. Therefore, the effects of NO and iron on the growth of marine phytoplankton were mutual.

关键词： nitric oxide (NO) iron marine algae the mutual effects

没食子酸通过NF-κB通路对缺氧诱导的 BV2小胶质细胞损伤的保护作用机制

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成都中医药大学学报 2024年第2期47卷 11-17页

作者：陈洁陈科孟宪丽王小博陈小睿成都中医药大学药学院四川成都611137 成都中医药大学创新研究院/交叉学科研究院四川成都611137

目的:建立BV2细胞缺氧损伤模型,研究没食子酸通过NF-κB通路对缺氧诱导的BV2小胶质细胞损伤的保护作用机制。方法:取BV2小胶质细胞分为空白组、模型组、低剂量、中剂量及高剂量组,通过三气培养箱建立BV2小胶质细胞缺氧损伤模型,低剂量... 详细信息

目的:建立BV2细胞缺氧损伤模型,研究没食子酸通过NF-κB通路对缺氧诱导的BV2小胶质细胞损伤的保护作用机制。方法:取BV2小胶质细胞分为空白组、模型组、低剂量、中剂量及高剂量组,通过三气培养箱建立BV2小胶质细胞缺氧损伤模型,低剂量、中剂量及高剂量组分别给予1.7 g/mL、3.4 g/mL、8.5 g/mL没食子酸进行干预。采用CCK-8法检测没食子酸对缺氧的BV2细胞的保护作用,使用试剂盒检测上清中乳酸脱氢酶(LDH)、细胞中超氧化物歧化酶(SOD)活力、丙二醛(MDA)和活性氧(ROS)的含量,ELISA检测上清中炎症因子表达水平(TNF-α、IL-1β、IL-6),Western blot检测BV2细胞内p-IKK/IKK、p-IκB/IκB和pNF-κB p65/NF-κB p65蛋白的表达水平以及NF-κB p65的核位移。结果:与空白对照组相比,缺氧可造成BV2细胞培养基上清液LDH的活力增加和炎症因子(TNF-α、IL-1β、IL-6)的释放,细胞中SOD活力降低,MDA和ROS的水平升高,NF-κB通路(p-IKK/IKK、p-IκB/IκB和p-NF-κB p65/NF-κB p65蛋白的表达水平)的激活以及NF-κB p65的核位移。没食子酸能通过降低LDH的活力,抑制氧化应激(提高SOD的活力,下调MDA和ROS水平)、抑制炎症因子的释放、抑制NF-κB通路相关蛋白的激活以及NF-κB p65的核位移改善缺氧引起的BV2细胞损伤。结论:没食子酸对缺氧诱导的BV2细胞炎症具有保护作用。

关键词：没食子酸缺氧 BV2小胶质细胞炎症 NF-κB通路

Formation mechanism and control strategy for particulate nitrate in China

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Journal of Environmental Sciences 2023年第1期123卷 476-486页

作者： Haichao Wang Keding Lu Zhaofeng Tan xiaorui chen Yuhan Liu Yuanhang Zhang School of Atmospheric Sciences Sun Yat-sen UniversityGuangzhou 510275China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Institute of Energy and Climate Research IEK-8:TroposphereForschungszentrum Jülich GmbHJülich 52428Germany Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China China Institute of Atomic Energy Beijing 100193China

Over the past decade,fine particulate matter(PM)pollution in China has been abated significantly,benefiting from strict emission control measures,but particulate nitrate continues to ***,we review the progress in particulate nitrate(p NO3-)pollution characterization,nitrate formation mechanisms,and the proposed control strategies in *** spatial and temporal distributions of p NO3-are *** current status of knowledge on the chemical mechanism is updated,and the significance of its formation pathways is assessed by various approaches such as field observation and modelling of nitrate production rate,as well as isotopic *** factors impacting p NO3-formation and the corresponding pollution regulation strategies are discussed,in which the importance of atmospheric oxidation capacity and ammonia are ***,the challenges and open questions in p NO3-pollution control in China are outlined.

关键词： Particulate nitrate Reactive nitrogen Particulate matter Formation mechanism Air pollution control

探测激子极化激元在超薄范德华微晶中的光传播

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Chinese Journal of Chemical Physics 2024年第1期37卷 35-42,I0001-I0004,I0117页

作者： Talha Ijaz 边琦曹琰丁皓璇陈晓瑞卢欢杨树邢雪婷方思敏刘孟源张鑫高健智潘明虎陕西师范大学物理学与信息技术学院西安710062 华中科技大学物理学院武汉430074 洛阳师范大学物理与电子信息学院洛阳英国伯明翰大学物理与天文学院伯明翰B152TT 西安文理学院机械与材料工程学院西安710065 陕西师范大学地理与旅游学院西安710119 复旦大学信息科学与工程学院上海200433 珠海复旦创新研究院珠海519000 西北大学物理学院西安710069

激子极化激元是一种准粒子,过渡金属二硫族化合物材料即使在室温下也能支持传播激子极化子,是非常好的纳米光子学研究平台.已有研究表明,通过散射型扫描近场光学显微镜可以对过渡金属二硫族化合物薄片中激子极化激元进行实空间探测,但... 详细信息

激子极化激元是一种准粒子,过渡金属二硫族化合物材料即使在室温下也能支持传播激子极化子,是非常好的纳米光子学研究平台.已有研究表明,通过散射型扫描近场光学显微镜可以对过渡金属二硫族化合物薄片中激子极化激元进行实空间探测,但波导厚度仅限于低至30 nm.本文采用三种不同波长的入射光(1550和1064 nm的近红外以及633 nm的可见光),通过基于原子力显微镜的散射型扫描近场光学显微镜测量,探测到MoS2和WSe2薄片中激子极化子普通横电模式的纳米光学成像.在厚度分别低至~3 nm(相当于4原子层)和~8 nm(相当于12原子层)的超薄MoS2和WSe2薄片上,可以清楚地观察到干涉条纹图案,大大打破了之前的测量厚度限制.当厚度接近几个原子层时,波矢量始终保持在1.6k0~1.7k0左右,而不是理论预言的1k0.这些模式的特性表明,体系是由近乎悬浮的过渡金属二硫族化合物薄片的三层对称波导构成,其对激子极性子的传播产生限域效应.研究结果为探索基于超薄过渡金属二硫族化合物材料的近红外区极化器件提供了深入的理解和开辟了新的途径.

关键词：二维过渡金属二硫族化合物材料散射型扫描近场光学显微镜激子极化子

气相色谱——三重四极杆串联质谱法及高效液相色谱——串联质谱检法测定人参中禁用农药残留物

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广东化工 2024年第8期51卷 138-142,163页

作者：谢春晓陈海明陈小锐李程瑶余静怡广东省药品监督管理局事务中心广东广州510000 清远市食品药品检验所广东清远511517

目的:建立使用气相色谱-三重四极杆串联质谱法及高效液相色谱-串联质谱检法测定人参中禁用农药残留物的测定方法。方法:参照2020年版《中国药典》通则2341第五法4.1方式操作步骤,分别采用岛津气相色谱-串联质谱GC-MSTQ8040、高效液相色... 详细信息

目的:建立使用气相色谱-三重四极杆串联质谱法及高效液相色谱-串联质谱检法测定人参中禁用农药残留物的测定方法。方法:参照2020年版《中国药典》通则2341第五法4.1方式操作步骤,分别采用岛津气相色谱-串联质谱GC-MSTQ8040、高效液相色谱-串联质谱Waters XEVO TQMS进行检测分析。结果:对空白样品按低中高浓度分别加入混合对照品溶液500μL、1000μL、1500μL(添加浓度以灭线磷计分别为:0.04 mg/kg;0.08 mg/kg;0.12 mg/kg)后,按照文中前处理方法处理后,在岛津气相色谱-串联质谱GC-MSTQ8040上机,每个浓度平行3份样品考察回收率和RSD,结果显示,低中高浓度加标回收率分别为:86.83%~108.43%;91.39%~112.99%;88.47%~115.09%。,RSD分别为:0.54%~9.74%;2.24%~4.20%;1.07%~2.96%。回收率高,重现性好。对空白样品按低中高浓度分别加入混合对照品溶液500μL、1000μL、1500μL(添加浓度以灭线磷计分别为:0.1 mg/kg;0.2 mg/kg;0.3 mg/kg)后,按照文中前处理方法处理后,在高效液相色谱-串联质谱WatersXEVOTQMS上机,每个浓度平行3份样品考察回收率和RSD,结果显示,低中高浓度加标回收率分别为:74.33%~103.29%;72.55%~105.16%;81.54%~103.41%。RSD分别为:0.29%~6.01%;1.07%~8.32%;0.41%~7.74%。回收率高,重现性好。结论:该方法便捷,回收率和稳定性良好,适用于人参中禁用农药残留物的测定。

关键词：气相色谱-三重四极杆串联质谱法高效液相色谱-串联质谱检法禁用农药残留物直接提取法人参

Corrosion Inhibition by Co-Immobilized Lysozyme and Lipase in Circulating Cooling Water System

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China Petroleum Processing & Petrochemical Technology 2017年第2期19卷 21-32页

作者： Liu Fang Lü Yucui Jiang Guofei chen xiaorui Sun Juan Zhao Chaocheng State Key Laboratory of Petroleum Pollution Control Department of Environmental and Safety Engineering China University of Petroleum Qingdao 266580

The corrosion inhibition performance of co-immobilized lysozyme and lipase was investigated in a recirculating cooling water system. Four methods were carried out in co-immobilization, and the operating parameters were optimized by using the respond surface methodology(RSM). The corrosion inhibition performance of co-immobilized lipase and lysozyme was evaluated by weight loss measurements and electrochemical measurements. The results revealed that the optimal co-immobilization method should be the sequential immobilization of lysozyme and then lipase. The inhibition efficiency was 86.10% under the optimal co-immobilized conditions. Electrochemical data showed that co-immobilized lysozyme and lipase was a mixed-type inhibitor and the corrosion inhibition efficiency was 81%.

关键词： circulating cooling water co-immobilization lysozyme lipase corrosion inhibition

Combined Use of Co-immobilized Lysozyme and Lipase and Chemical Inhibitors in Circulating Cooling Water System

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China Petroleum Processing & Petrochemical Technology 2018年第4期20卷 82-90页

作者： Jiang Guofei chen xiaorui Lu Xin Liu Fang Wang Yongqiang Zhao Chaocheng Sun Juan College of Chemical Engineering China University of PetroleumQingdao 266580 State Key Laboratory of Petroleum Pollution Control Beijing 102206

In order to improve the stability and corrosion inhibition performance of bioenzyme, lipase and lsozyme were co-immobilized on the mesoporous molecular sieve MCM-41 by the adsorption method. Then the immobilized enzymes were combined with amino trimethylene phosphonic acid and polyaspartic acid to prevent corrosion caused by circulating cooling water. The weight-loss method and electrochemical techniques were used to evaluate the performance of composite inhibitors. The co-immobilized lysozyme and lipase achieved good inhibition effects. After they were combined with amino trimethylene phosphonic acid and polyaspartic acid, the corrosion inhibition properties were further improved. The inhibition efficiency was promoted to 94.4%. During the corrosion inhibition process, the immobilized enzymes played an important role. The addition of corrosion inhibitor could inhibit the anodic dissolution and cathodic hydrogen evolution process of carbon steel at the same time. The adsorption of co-immobilized lysozyme and lipase composite inhibitor on the steel surface was a joint action involving physical adsorption and chemical adsorption.

关键词： carbon steel electrochemical impedance spectroscopy potentiodynamic polarization co-immobilized lysozyme and lipase

甲磺酸倍他司汀片结合活血化瘀法治疗感应神经性耳聋的临床探讨

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系统医学 2024年第3期9卷 54-57页

作者：褚云锋黄晶晶孙燕陈骁锐陶丹丹张家港市中医医院耳鼻喉科江苏张家港215600

目的研究甲磺酸倍他司汀片和活血化瘀法联合应用于感应神经性耳聋治疗中的临床疗效。方法选取2020年8月—2022年8月张家港市中医医院收治的48例感应神经性耳聋患者作为研究对象,按随机数表法分为两组,对照组(n=24)使用甲磺酸倍他司汀片... 详细信息

目的研究甲磺酸倍他司汀片和活血化瘀法联合应用于感应神经性耳聋治疗中的临床疗效。方法选取2020年8月—2022年8月张家港市中医医院收治的48例感应神经性耳聋患者作为研究对象,按随机数表法分为两组,对照组(n=24)使用甲磺酸倍他司汀片治疗,观察组(n=24)使用甲磺酸倍他司汀片联合活血化瘀法治疗。比较两组患者的疗效和不良反应发生情况。结果治疗后,观察组的耳鸣评分(0.39±0.08)分、耳胀闷感评分(0.26±0.07)分、恶心呕吐评分(0.49±0.08)分以及眩晕评分(0.38±0.07)分均低于对照组,差异有统计学意义(t=25.648、25.390、14.176、26.301,P均0.05)。结论感应神经性耳聋患者应用甲磺酸倍他司汀片和活血化瘀法治疗可有效改善疾病症状,提升听力水平,且具有较高的安全性。

关键词：甲磺酸倍他司汀片活血化瘀法感应神经性耳聋听力水平中医证候