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20篇 您的检索式:作者名="Wang Yangdong"
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1Applied catalysis for sustainable development of chemical industry in China显示文摘Progressing green chemical technologies is signiicant to the sustainable development of chemical industry in China, as the energy and environment problems increasingly became great challenges to the whole society. he scientiic connotation of sustainable energy chemical engineering can be generalized as green carbon/hydrogen science which means optimization of carbon/hydrogen atom economics based on high eicient catalysis and low-carbon emission. his review illustrated recent advances in developing sustainable technologies for applied catalysis in chemical industry of China, including the ields of high eicient conversion of heavy oil, green petrochemical catalytic technologies, clean utilization of coal and natural gas, promoting sustainable resources and clean energy, etc. Moreover, from the view of industrial point, some important common scientiic problems were discussed and summarized, such as the relation between molecular difusion and catalyzing eiciency, homogeneous catalysis in heterogeneous catalysts,in situ or operando characterization of industrial catalysis, etc., aiming to supplying a forward roadmap to academia and/or industry.Zaiku Xie Zhicheng Liu Yangdong Wang Zhonghao Jin 2015National Science Review2015,2,2:10
2The essential mass transfer step in hierarchical/nano zeolite: surface diffusion显示文摘An important topic in zeolite catalyst design is how to improve utilization efficiency o f active sites in micropores by upgrading the effective diffusivity o f reactants/products in zeolite crystal particles[l].Nano-and hierarchical structures have drawn lots of attention in zeolitic catalysis fields in recent years;because these two methods can obviously improve the catalysis efficiency by shortening the configuration diffusion length[2].However,new problems were raised in the construction process of hierarchical or nano-zeolites.For instance,it was found that the hierarchical structure can change the intrinsic properties of surface acid sites in zeolite[3].Fan et al.reported that when the length scale o f the zeolite approaches several nanometers;the difFusional time constants[4,5]and the apparent configuration diffusion lengths will be significantly increased than expected[6].Therefore,enhanced mass transport in hierarchical zeolite will be overpredicted if not considering the extent of sorbate-sorbent interaction.Jian Zhou Wei Fan Yangdong Wang Zaiku Xie 2020National Science Review2020,7,11:7
3Insight into the topology effect on the diffusion of ethene and propene in zeolites: A molecular dynamics simulation study显示文摘Selectivity control is a difficult scientific and industrial challenge in methanol-to-olefins(MTO)conversion.It has been experimentally established that the topology of zeolite catalysts influenced the distribution of products.Besides the topology effect on reaction kinetics,the topology influences the diffusion of reactants and products in catalysts as well.In this work,by using COMPASS force-field molecular dynamics method,we investigated the intracrystalline diffusion of ethene and propene in four different zeolites,CHA,MFI,BEA and FAU,at different temperatures.The self-diffusion coefficients and diffusion activation barriers were calculated.A strong restriction on the diffusion of propene in CHA was observed because the self-diffusion coefficient ratio of ethene to propene is larger than 18 and the diffusion activation barrier of propene is more than 20 kJ/mol in CHA.This ratio decreases with the increase of temperature in the four investigated zeolites.The shape selectivity on products from diffusion perspective can provide some implications on the understanding of the selectivity difference between HSAPO-34 and HZSM-5 catalysts for the MTO conversion.Chuanming Wang Bowei Li Yangdong Wang Zaiku Xie 2013Journal of Energy Chemistry2013,22,6:6
4Palm oil protectsα-linolenic acid from rumen biohydrogenation and muscle oxidation in cashmere goat kids显示文摘Background:In ruminants,dietary C18:3n-3 can be lost through biohydrogenation in the rumen;and C18:3n-3 that by-passes the rumen still can be lost through oxidation in muscle,theoretically reducing the deposition of C18:3n-3,the substrate for synthesis of poly-unsaturated fatty acids(n-3 LCPUFA)in muscle.In vitro studies have shown that rumen hydrogenation of C18:3n-3 is reduced by supplementation with palm oil(rich in cis-9 C18:1).In addition,in hepatocytes,studies with neonatal rats have shown that cis-9 C18:1 inhibits the oxidation of C18:3n-3.It therefore seems likely that palm oil could reduce both rumen biohydrogenation of C18:3n-3 and muscle oxidation of C18:3n-3.The present experiment tested whether the addition of palm oil to a linseed oil supplement for goat kids would prevent the losses of C18:3n-3 and thus improve the FA composition in two muscles,Longissimus dorsi and Biceps femoris.To investigate the processes involved,we studied the rumen bacterial communities and measured the mRNA expression of genes related to lipid metabolism in Longissimus dorsi.Sixty 4-month-old castrated male Albas white cashmere kids were randomly allocated among three dietary treatments.All three diets contained the same ingredients in the same proportions,but differed in their fat additives:palm oil(PMO),linseed oil(LSO)or mixed oil(MIX;2 parts linseed oil plus 1 part palm oil on a weight basis).Results:Compared with the LSO diet,the MIX diet decreased the relative abuandance of Pseudobutyrivibrio,a bacterial species that is positively related to the proportional loss rate of dietary C18:3n-3 and that has been reported to generate the ATP required for biohydrogenation(reflecting a decrease in the abundance of rumen bacteria that hydrogenate C18:3n-3 in MIX kids).In muscle,the MIX diet increased concentrations of C18:3n-3,C20:5n-3,C22:6n-3,and n-3 LCPUFA,and thus decreased the n-6/n-3 ratio;decreased the mRNA expression of CPT1β(a gene associated with fatty acid oxidation)and increased the mRNA expression of FADS1 and FADS2(genes associated with n-3 LCPUFA synthesis),compared with the LSO diet.Interestingly,compared to Longissimus dorsi,Biceps femoris had greater concentrations of PUFA,greater ratios of unsaturated fatty acids/saturated fatty acids(U/S),and poly-unsaturated fatty acids/saturated fatty acids(P/S),but a lesser concentration of saturated fatty acids(SFA).Conclusions:In cashmere goat kids,a combination of linseed and palm oils in the diet increases the muscle concentration of n-3 LCPUFA,apparently by decreasing the relative abundance of rumen bacteria that are positively related to the proportional loss rate of dietary C18:3n-3,by inhibiting mRNA expression of genes related to C18:3n-3 oxidation in muscle,and by up-regulating mRNA expression of genes related to n-3 LCPUFA synthesis in muscle,especially in Longissimus dorsi.Xue Wang Graeme B.Martin Qi Wen Shulin Liu Yinhao Li Binlin Shi Xiaoyu Guo Yanli Zhao Yangdong Guo Sumei Yan 2021Journal of Animal Science and Biotechnology2021,12,2:3
5Understanding Zeolites Catalyzed Methanol-to-Olefins Conversion from Theoretical Calculations显示文摘Chuanming Wang Yangdong Wang Zaiku Xie 2018Chinese Journal of Chemistry2018,36,5:3
6Shape selective catalysis in methylation of toluene: Development, challenges and perspectives显示文摘Jian Zhou Zhicheng Liu Yangdong Wang Dejin Kong Zaiku Xie 2018Frontiers of Chemical Science and Engineering2018,12,1:3
7Towards a green bulk-scale biobutanol from bioethanol upgrading显示文摘Biobutanol is attracting increasingly interest as a source of renewable energy and biofuels because of its many advantages over bioethanol that include higher energy density, fuel efficiency, and reduced engine damages. Currently, there is a growing interest in producing biobutanol from bioethanol, in view of the tremendous potential benefits of this transformation for the bulk production of biobutanol in a target specific manner. This perspective paper describes recent progress for the ethanol to butanol process. The different catalysts, including homogeneous and heterogeneous catalytic systems, for ethanol to butanol are outlined and compared, and the key issues and requirements for future developments are highlighted.A major challenge for further development and application of ethanol to butanol process is to find an optimal balance between different catalytic functions and to suppress the formation of side products that has plagued most catalytic bioethanol upgrading systems.Qi Zhang Jing Dong Yongmei Liu Yangdong Wang Yong Cao 2016Journal of Energy Chemistry2016,25,6:2
8Effect of support nature on WO3/SiO2 structure and butane-1 metathesis显示文摘Wang Yangdong Chen Qingling Yang Weimin 2003Applied Catalysis A:Gereral2003,250,:1
9A Selfadaptive RBF Neural Network Classifier for Transformer Fault Analusis 显示文摘Ke Meng Zhao Yangdong Wang Dianhui 2010IEEE Transactions on Power Systems2010,25,3:1
10On the enhanced catalytic activity of TiO2-supported layered compounds for Cr(Ⅵ) photo-reduction显示文摘Shourong Zheng Zhaoyi Xu Yangdong Wang 2000J Photochem Photobio A: Chem2000,137,:1
11Fabrication of core/shell structure via overgrowth of ZSM-5 layers on mordenite crystals显示文摘Dejin Kong Junlin Zheng Xiaohong Yuan Yangdong Wang Dingye Fang 2008Microporous and Mesoporous Materials2008,,1:1
12D6 protein kinase in root xylem benefiting resistance to Fusarium reveals in fection and defense mechanisms in tung trees显示文摘Fusarium oxysporum,a global soil-borne pathogen,causes severe disease in various cultivated plants.The mechanism underlying infection and resistance remains largely elusive.Vernicia fordii,known as the tung tree,suffers from disease caused by F.oxysporum f.sp.fordiis(Fof-1),while its sister species V.montana displays high resistance to Fof-1.To investigate the process of infection and resistance ability,we demonstrated that Fof-1 can penetrate the epidermis of root hairs and then centripetally invade the cortex and phloem in both species.Furthermore,Fof-1 spread upwards through the root xylem in susceptible V.fordii trees,whereas it failed to infect the root xylem in resistant V.montana trees.We found that D6 PROTEIN KINASE LIKE 2(VmD6PKL2)was speci fically expressed in the lateral root xylem and was induced after Fof-1 infection in resistant trees.Transgenic analysis in Arabidopsis and tomato revealed that VmD6PKL2 signi ficantly enhanced resistance in both species,whereas the d6pkl2 mutant displayed reduced resistance against Fof-1.Additionally,VmD6PKL2 was identi fied to interact directly with synaptotagmin(VmSYT3),which is speci fically expressed in the root xylem and mediates the negative regulation responding to Fof-1.Our data suggested that VmD6PKL2 could act as a resistance gene against Fof-1 through suppression of VmSYT3-mediated negative regulation in the lateral root xylem of the resistant species.These findings provide novel insight into Fusarium wilt resistance in plants.Qiyan Zhang Liwen Hengfu Yin Zilong Xu Yunxiao Zhao Ming Gao Hong Wu Yicun Chen Yangdong Wang 2021Horticulture Research2021,8,1:1
13Selective production of propylene from methanol: Mesoporosity development in high silica HZSM-5显示文摘Changsong Mei Pengyu Wen Zhicheng Liu Hongxing Liu Yangdong Wang Weimin Yang Zaiku Xie Weiming Hua Zi Gao 2008Journal of Catalysis2008,,1:1
14Effect of support nature on WO3-SiO2 structure and butene-1 metathesis显示文摘WANG Yangdong CHEN Qingling YANG Weimin 2003Appl Catal A: General2003,250,:1
15Testing and validation of a self-diffusion coefficient model based on molecular dynamics simulations显示文摘In our previous work,we endowed a new physical meaning of self-diffusion coefficient in Fick’s law,which proposed that the diffusion coefficient can be described as the product of the characteristic length and the diffusion velocity.To testify this simple theory,in this work,we further investigated the underlying mechanism of the characteristic length and the diffusion velocity at the molecular level.After a complete dynamic run,the statistical average diffusion velocity and the characteristic length of molecules can be obtained by scripts,and subsequently the diffusion coefficient was determined by our proposed theory.The diffusion processes in 35 systems with a wide range of pressure and concentration variations were simulated using this model.From the simulated results,diffusion coefficients from our new model matched well with the experimental results from literatures.The total average relative deviation of predicted values with respect to the experimental results is 8.18%,indicating that the novel model is objective and rational.Compared with the traditional MSD-t model,this novel diffusion coefficient model provides more reliable results,and the theory is simple and straightforward in concept.Additionally,the effect of gas pressure and liquid concentration on the diffusion behavior were discussed,and the microscopic diffusion mechanism was elucidated through the distribution of diffusion velocity and the characteristic length analysis.Moreover,we suggested new distribution functions,providing more reliable data theoretical foundations for the future research about the diffusion coefficient.Xia Chen Yan Wang Lianying Wu Weitao Zhang Yangdong Hu 2021Chinese Journal of Chemical Engineering2021,34,8:1
16Silica nanoparticle with a single His-tag for addressable functionalization, reversible assembly, and recycling显示文摘Yuye Cao Yangdong Cui Yu Yang Jie Hua Zheng-Mei song Haifang Wang Yuanfang Liu Aoneng Cao 2018Nano Research2018,11,5:0
17Antimicrobial activity of essential oils extracted from Litsea cubeba显示文摘Litsea cubeba(Lour.)Pers.(Lauraceae),also known as May Chang tree or Chinese pepper,is frequently utilized for its essential oil,which is widely used in flavors,perfumes,and antimicrobials.Despite its myriad of uses,the stability and diversity of the various chemical components of L.cubeba oil have not been sufficiently investigated.Here,we utilized 31 families planted in a test forest.The stability of the essential oil content in each family was assessed over a four-year period.The chemical profiles of the essential oils from the 31 families were established.A total of 103 components were identified,with approximately 30 components found per family.Additionally,the antifungal and antibacterial activities were investigated,with significant variations found among families.The most abundant component was citral,which has previously been shown to possess antifungal activities.In addition,inhibition rates,EC50,and MIC values were measured,and the F7,G3,G4,and F9 families were found to manifest significantly stronger antifungal activity,with inhibition rates above 91%at a concentration of 250μL/L.The F7,G3,G4,and L24 families possessed strong antibacterial activity on gram-negative bacteria at a concentration of 50μL/mL.In summary,we assessed the chemical profiles of L.cubeba essential oil for different families and found that there were significant differences in essential oil components and antibacterial activities among families.Our results suggest that L.cubeba families can be further selected to improve their industrial applications and increase the quality of essential oils extracted from them.Xue Wang Ming Gao Liwen Wu Yunxiao Zhao Yangdong Wang Yicun Chen 2022Forestry Research2022,2,1:0
18Thermometry of photosensitive and optically induced electrokinetics chips显示文摘Optically induced electrokinetics(OEK)-based technologies,which integrate the high-resolution dynamic addressability of optical tweezers and the high-throughput capability of electrokinetic forces,have been widely used to manipulate,assemble,and separate biological and non-biological entities in parallel on scales ranging from micrometers to nanometers.However,simultaneously introducing optical and electrical energy into an OEK chip may induce a problematic temperature increase,which poses the potential risk of exceeding physiological conditions and thus inducing variations in cell behavior or activity or even irreversible cell damage during bio-manipulation.Here,we systematically measure the temperature distribution and changes in an OEK chip arising from the projected images and applied alternating current(AC)voltage using an infrared camera.We have found that the average temperature of a projected area is influenced by the light color,total illumination area,ratio of lighted regions to the total controlled areas,and amplitude of the AC voltage.As an example,optically induced thermocapillary flow is triggered by the light image-induced temperature gradient on a photosensitive substrate to realize fluidic hydrogel patterning.Our studies show that the projected light pattern needs to be properly designed to satisfy specific application requirements,especially for applications related to cell manipulation and assembly.Feifei Wang Lianqing Liu Gongxin Li Pan Li Yangdong Wen Guanglie Zhang Yuechao Wang Gwo-Bin Lee Wen Jung Li 2018Microsystems & Nanoengineering2018,4,1:0
19Deadlock Detection in FPGA Design: A Practical Approach显示文摘Formal verification of VHSIC Hardware Description Language(VHDL) in Field-Programmable Gate Array(FPGA) design has been discussed for many years. In this paper we provide a practical approach to do so. We present a semi-automatic way to verify FPGA VHDL software deadlocks, especially those that reside in automata.A domain is defined to represent the VHDL modules that will be verified; these modules will be transformed into Verilog models and be verified by SMV tools. By analyzing the verification results of SMV, deadlocks can be found;after looking back to the VHDL code, the deadlocking code is located and the problem is solved. VHDL verification is particularly important in safety-critical software. As an example, our solution is applied to a Multifunction Vehicle Bus Controller(MVBC) system for a train. The safety properties were tested well in the development stage, but experienced a breakdown during the long-term software testing stage, which was mainly caused by deadlocks in the VHDL software. In this special case, we managed to locate the VHDL deadlocks and solve the problem by the FPGA deadlock detection approach provided in this paper, which demonstrates that our solution works well.Dexi Wang Fei He Yangdong Deng Chao Su Ming Gu Jiaguang Sun 2015Tsinghua Science and Technology2015,20,2:0
20Ruminal bacterial community is associated with the variations of total milk solid content in Holstein lactating cows显示文摘Total milk solid(TMS)content directly reflects the quality of milk.Rumen bacteria ferment dietary components,the process of which generates the precursors for the synthesis of milk solid,therefore,the variation in rumen bacterial community could be associated with milk solid in dairy cows.In this study,45 healthy mid-lactation Holstein dairy cows with the similar body weight,lactation stage,and milk yield were initially used for the selection of 10 cows with high TMS(HS)and 10 cows with low TMS(LS).All those animals were under the same feeding management,and the individual milk yield was recorded for 14 consecutive days before milk and rumen fluid were sampled.Rumen fluid was used to determine bacterial community by 16S rRNA gene sequencing technique.The HS cows had significantly greater feed intake and milk TMS,fat,protein content than LS cows(P<0.05).Among the volatile fatty acids(VFA),propionic acid and valeric acid concentrations were significantly greater in HS cows than those in LS cows(P<0.05).There was no significant difference in the concentrations of acetate,butyrate,isobutyrate,valerate,and the total VFA(P>0.05),nor was the acetate-to-propionate ratio,pH value,ammonia nitrogen and microbial crude protein concentrations(P>0.05).Significant differences in the relative abundances of some bacterial genera were found between HS and LS cows.Spearman’s rank correlation analysis revealed that TMS content was correlated positively with the abundances of Ruminococcaceae UCG-014,Ruminococcaceae NK4A214 group,Prevotellaceae UCG-001,Butyrivibrio 2,Prevotellaceae UCG-003,Candidatus Saccharimonas,Ruminococcus 2,Lachnospiraceae XPB1014 group,probable genus 10,Eubacterium ventriosum group,but negatively correlated with Pyramidobacte.In addition,Ruminococcaceae UCG-014,Ruminococcus 2,Ruminococcaceae UCG001,probable genus 10 and Eubacterium ventriosum group might boost the total VFA production in the rumen.In conclusion,the dry matter intake of dairy cows and some special bacteria in rumen were significantly associated with TMS content,which suggests the potential function of rumen bacteria contributing to TMS content in dairy cows.Kaizhen Liu Yangdong Zhang Guoxin Huang Nan Zheng Shengguo Zhao Jiaqi Wang 2022Animal Nutrition2022,,2:0
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