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Journal of Environmental Sciences 2020年第9期32卷 82-90页

作者： Jianqiang Zhu jianlong li lin Du Environment Research Institute Shandong UniversityQingdao 266237China

Secondary organic aerosol(SOA)formation potential for six kinds of short aliphatic ethers has been *** size distribution,mass concentration,and yield of SOA formed by ethers photooxidation were determined under different *** results showed that all six ethers can generate SOA via reaction with OH radicals even under no seed and NOxfree *** mass concentration for six seedless experiments was less than 10μg/m3 and the SOA yields were all below 1%.The strong increase in the SOA formation was observed when the system contained ammonium sulfate seed particles,while SOA yield decreased under the high-NOx *** composition was analyzed using offline *** spectra indicated that there are complex components in the particle-phase including carbonyls acid and aldehydes ***,the aqueous filter extracts were analyzed using ultraviolet-visible spectrometer and fluorescence *** the fresh methyl n-butyl ether SOA,the largest absorption peak occurs at 280 nm and there exists slightly absorption in the 300-400 ***-emission matrices display the distinct peak at excitation/emission=470 nm/480 nm according to the fluorescence *** findings are important considerations of formation for ether SOA that can eventually be included in atmospheric models.

关键词： aerosol photooxidation potential

Analysis of deformation and internal flow patterns for rising single bubbles in different liquids

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Chinese Journal of Chemical Engineering 2019年第4期27卷 745-758页

作者： Xin li Pan Zhang jianlong li Weiwen Wang Guanghui Chen College of Chemical Engineering Qingdao University of Science and Technology Qingdao 266042 China College of Electromechanical Engineering Qingdao University of Science and Technology Qingdao 266061 China

Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rules of bubbles, which influence the mass transfer efficiency to a large extent, have received much less attention. In this paper, the volume of fluid method was used to calculate the bubble shapes, pressure, velocity distributions,and the flow patterns inside the bubbles. The rising behavior of the bubbles with four different initial diameters,i.e., 3 mm, 5 mm, 7 mm and 9 mm was investigated in four various liquids including water, 61.23% glycerol,86.73% glycerol and 100% glycerol. The results show that the liquid properties and bubble initial diameters have great impacts on bubble shapes. Moreover, flow patterns inside the bubbles with different initial diameters were analyzed and classified into three types under the condition of different bubble shapes. Three correlations for predicting the maximum internal circulation inside the bubbles in 86.73% glycerol were presented and the R-square values were all bigger than 0.98. Through analyzing the pressure and velocity distributions around the bubbles, four rules of bubble deformation were also obtained to explain and predict the shapes.

关键词： Multiphase flow Bubble Interface Deformation analysis Internal flow pattern Rising behavior

li^+ extraction/insertion reaction with Mg_2Mn_(0.5)Ti_(0.5)O_4 inverse spinel in the aqueous phase

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Rare Metals 2007年第6期26卷 536-540页

作者： JANG Jinhe DONG Dianquan CHEN Guanghui liU Jiaqiang li jianlong Department of Chemical Engineering Qingdao University of Science ＆ Technology Qingdao 266042 China

An inverse spinel-type metal oxide, magnesium-manganese-titanium oxide （Mg2Mn0.5Ti0.5O4）, were prepared using the coprecipitation/thermal crystallization method. The extraction/insertion reaction with this material was investigated by X-ray, saturation capacity of exchange, pH titration, and distribution coefficient （Kd） measurement. The acid treatments of Mg2Mn0.5Ti0.5O4 caused Mg^2＋ extractions of more than 81%, whereas the dissolutions of Mn^4＋ and Ti^4＋ were less than 10%. The experimental results proved that the acid-treated sample has a capacity of exchange 56 mg·g^-1 for li^＋ in the solution. The chemical analysis showed that the li^＋ extraction/insertion progressed mainly by ion-exchange mechanism and surface adsorption.

关键词： extraction/insertion reaction inverse spinel-type metal oxides ion-exchange mechanism Mg2Mn0.5Ti0.5O4

Mass transfer enhancement and hydrodynamic performance with wire mesh coupling solid particles in bubble column reactor

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Chinese Journal of Chemical Engineering 2024年第3期67卷 195-205页

作者： Chuanjun Di Jipeng Dong Fei Gao Guanghui Chen Pan Zhang jianlong li Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266043China

It is of vital significance to investigate mass transfer enhancements for chemical engineering *** work focuses on investigating the coupling influence of embedding wire mesh and adding solid particles on bubble motion and gas-liquid mass transfer process in a bubble *** image velocimetry(PIV)technology was employed to analyze the flow field and bubble motion behavior,and dynamic oxygen absorption technology was used to measure the gas-liquid volumetric mass transfer coefficient(kLa).The effect of embedding wire mesh,adding solid particles,and wire mesh coupling solid particles on the flow characteristic and kLa were analyzed and *** results show that the gas-liquid interface area increases by 33%-72%when using the wire mesh coupling solid particles strategy compared to the gas-liquid two-phase flow,which is superior to the other two strengthening *** with the system without reinforcement,kLa in the bubble column increased by 0.5-1.8 times with wire mesh coupling solid particles method,which is higher than the sum of kLa increases with inserting wire mesh and adding particles,and the coupling reinforcement mechanism for affecting gas-liquid mass transfer process was discussed to provide a new idea for enhancing gas-liquid mass transfer.

关键词： Fluid mechanics Bubble Mass transfer Wire mesh coupling solid particles Particle image velocimetry Hydrodynamics

Predicting siRNA activity based on back-propagation neural network

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Frontiers in Biology 2008年第2期3卷 154-159页

作者： jianlong li Zhengzhi WANG Xiaomin WANG Institute of Mechanical Engineering and Automation National University of Defense TechnologyChangsha 410073China

RNA interference(RNAi)is a phenomenon of gene silence induced by a double-stranded RNA(dsRNA)homologous to a target *** can be used to identify the function of genes or to knock down the targeted *** RNAi technology,19 bp double-stranded short interfering RNAs(siRNA)with characteristic 39 overhangs are usually *** effects of siRNAs are quite varied due to the different choices in the sites of target ***,there are many factors influencing siRNA activity and these factors are usually *** find the motif features and the effect on siRNA activity,we carried out a feature extraction on some published experimental data and used these features to train a backpropagation neural network(BP NN).Then,we used the trained BP NN to predict siRNA activity.

关键词： RNA interference(RNAi) double-stranded RNA(dsRNA) back-propagation neural network(BP NN)

Desertification dynamic and the relative roles of climate change and human activities in desertification in the Heihe River Basin based on NPP

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Journal of Arid Land 2013年第4期5卷 465-479页

作者： Wei ZHOU ZhengGuo SUN jianlong li ChengCheng GANG ChaoBin ZHANG School of life Science Nanjing University

Relative roles of climate change and human activities in desertification are the hotspot of research on desertification dynamic and its driving *** overcome the shortcomings of existing studies,this paper selected net primary productivity （NPP） as an indicator to analyze desertification dynamic and its impact *** addition,the change trends of actual NPP,potential NPP and HNPP （human appropriation of NPP,the difference between potential NPP and actual NPP） were used to analyze the desertification dynamic and calculate the relative roles of climate change,human activities and a combination of the two factors in *** this study,the Moderate Resolution Imaging Spectroradiometer （MODIS）-Normalised Difference Vegetation Index （NDVI） and meteorological data were utilized to drive the Carnegie-Ames-Stanford Approach （CASA） model to calculate the actual NPP from 2001 to 2010 in the Heihe River *** NPP was estimated using the Thornthwaite Memorial *** showed that 61％ of the whole basin area underwent land degradation,of which 90.5％ was caused by human activities,8.6％ by climate change,and 0.9％ by a combination of the two *** the contrary,1.5％ of desertification reversion area was caused by human activities and 90.7％ by climate change,the rest 7.8％ by a combination of the two ***,it was demonstrated that 95.9％ of the total actual NPP decrease was induced by human activities,while 69.3％ of the total actual NPP increase was caused by climate *** results revealed that climate change dominated desertification reversion,while human activities dominated desertification ***,the relative roles of both climate change and human activities in desertification possessed great spatial ***,ecological protection policies should be enhanced in the Heihe River Basin to prevent desertification expansion under the condition of climate change.

关键词： desertification net primary productivity (NPP) climate change human activities quantitative assessment Heihe River Basin

Screening of stable internal reference genes by quantitative real-time PCR in humpback grouper Cromileptes altivelis

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Journal of Oceanology and limnology 2021年第5期39卷 1985-1999页

作者： Xiaojuan CHEN Yun SUN Panpan ZHANG jianlong li Haiping li Caoying WEI Zhenjie CAO Yongcan ZHOU State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou 570228China Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province Haikou 570228China Department of Aquaculture College of Marine SciencesHainan UniversityHaikou 570228China

Humpback grouper Cromileptes altivelis is one commercial fish with considerable economic *** determine the expression stabilities of six commonly used internal reference genes in *** challenged by Vibrio harveyi and viral nervous necrosis virus(VNNV)through quantitative real-time PCR(qRT-PCR),the expression levels of selected genes in five immune organs stimulated with pathogenic infection were carefully evaluated using algorithms of geNorm,NormFinder,and *** results show that the expre ssion stabilities of the six candidate inte rnal reference genes were diffe re *** no rmal physiological conditions,RPL13 were identified as the most stably expressed genes among five different immune organs(liver,spleen,kidney,intestine,and gill).After *** stimulation,RPL13,RPL13,EF1 A,RPL13,and EF1 A were identified by geNorm,NormFinder,and BestKeeper as the most stable genes in liver,spleen,kidney,intestine,and gill,*** these three algorithms suggested that under stimulation of VNNV,RPL13,EF1 A,Actin,RPL13,and Actin were as the most stable genes in liver,spleen,kidney,intestine,and gill,*** results suggest that specific experiment conditions and tissue types shall be considered when selecting the reference genes in qRT-PCR *** study provided a solid foundation for future studies on gene expression of *** under different conditions.

关键词： Cromileptes altivelis reference gene expression stability pathogenic infection

发酵调味品中真菌毒素污染状况及生物脱毒方法研究进展

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食品科学 2025年第1期46卷 304-314页

作者：王李惠付金慧李超伟张莉夏小龙李丝桐张梦梅陈阴竹刘书亮胡凯弟赵宁李琴李建龙四川农业大学食品学院四川雅安625014 四川省轻工业研究设计院四川成都610000 广安市食品药品检验检测中心四川广安638600

国内外不同发酵调味品中真菌毒素污染情况各不相同,这可能与产品原料、地理位置、季节等因素差异有关。微生物能够通过细胞壁的吸附作用或酶催化作用将真菌毒素转化为低毒或无毒物质,以保证发酵调味品的食用安全。随着生物脱毒研究的深... 详细信息

国内外不同发酵调味品中真菌毒素污染情况各不相同,这可能与产品原料、地理位置、季节等因素差异有关。微生物能够通过细胞壁的吸附作用或酶催化作用将真菌毒素转化为低毒或无毒物质,以保证发酵调味品的食用安全。随着生物脱毒研究的深入,许多能够高效降解真菌毒素的菌株被筛选出来,而食源及可应用于食品的对真菌毒素有降解能力的安全菌株研究依然较少。基于此,本文总结发酵调味品中真菌毒素的污染现状,重点综述不同来源的可降解真菌毒素的菌株及菌株细胞中的降解酶,旨在为减少发酵调味品中有害真菌及其毒素污染提供参考。

关键词：发酵调味品真菌毒素生物脱毒降解

Biomass briquette fuel,boiler types and pollutant emissions of industrial biomass boiler:A review

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Particuology 2023年第6期77卷 79-90页

作者： Hong Huang Yan Gao Hunan Chen Yiying Wu Jiayi Wang Chenglong Yu jianlong li Changwei Zou School of Resources and Environment Nanchang UniversityNanchang330031China Key Laboratory of Poyang Lake Environment and Resource Utilization Ministry of EducationNanchang330031China School of Land Resources and Environment Jiangxi Agricultural UniversityNanchang330045China

Biomass is considered a renewable and cleaner energy source alternative to fossil *** recent years,industrial biomass boilers have been rapidly developed and widely used in the industrial *** work makes a review on the fuel types used in industrial biomass boilers,the fuel characteristics and the characteristics of air pollutants emitted from the combustion of industrial biomass boilers and other contents in different ***,the existing research still has many *** the future,further research on biomass fuel,industrial biomass boiler combustion process and the pollutants emitted by industrial biomass boiler combustion,especially the carbonaceous aerosol emitted by in-dustrial biomass boiler and carbonaceous aerosol optical properties still need to be *** the same time,the potential harm of carbonaceous aerosols emitted from industrial biomass boiler sources to human health and climate change needs to be studied in *** review provides a scientific basis for the accurate evaluation of industrial biomass boilers and the effective prevention and control of various pollutants of industrial biomass boilers.

关键词： Industrial biomass boilers Biomass briquette fuel Emissions of air pollutants Biomass combustion

One-step preparation of efficient cuprous chloride catalyst for direct synthesis of trimethoxysilane

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Chinese Journal of Chemical Engineering 2024年第7期71卷 161-171页

作者： Jiaxin Zhang Lu Wang Zhiqiang Ma Chuanjun Di Guanghui Chen Jipeng Dong jianlong li Fei Gao Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China

CuCl-based catalysts are the most commonly used catalysts for the“direct synthesis”of trimethoxysilane(M3).CuCl species are sensitive to air and water,and are prone to oxidation *** CuCl is directly used as a catalyst,it needs to be purified before the utilization,and the operating conditions for the catalyst preparation are relatively harsh,requiring the inert gas *** a high-temperature activation step required for CuCl-based catalysts used for catalyzing synthesis of M3 to form active phase Cu–Si alloys(Cu_(x)Si)with Si powder,in this work,a series of catalysts for the“direct synthesis”of M3 were obtained by a one-step high-temperature activation of the mixture of stable CuCl_(2) precursors,activated carbon-reducing agent,and Si powder,simultaneously achieving the reduction of CuCl_(2) to CuCl and the formation of active phase Cu_(x)Si alloys of CuCl with Si *** prepared samples were characterized through various characterization techniques,and investigated for the catalytic performance for the“direct synthesis”of ***,the operation conditions were optimized,including the activation temperature,catalyst dosage,Si powder particle size,and reaction *** characterization results indicate that during the one-step activation process,the CuCl_(2) precursor is reduced to CuCl,and the resulting CuCl simultaneously reacts with Si powder to form active phases Cu3Si and Cu15Si4 *** optimal catalyst Sacm(250,0.8:10)exhibits a good catalytic activity with selectivity of 95%and yield of 77%for M3,and shows a good universality for various alcohol ***,the catalytic mechanism of the prepared catalyst for the“direct synthesis”of M3 was discussed.

关键词： Trimethoxysilane Cuprous chloride Catalysis Catalyst activation Reduction Active phase formation