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Energy intensity and its determinants in China:an empirical study based on ARDL-VECM approach

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Chinese Journal of Population,Resources and Environment 2017年第3期15卷 226-238页

作者： dan du Hongyan Lei School of Economics Southwestern University of Finance and Economics Chengdu University of TCM

The present study aims to better understand the relationship between energy intensity and its determinants including energy price, technological progress, economic structure, and energy mix using the autoregressive distributed lag(ARDL) bounds approach and vector error correction model technique. Based on China's time series over 1985-2014, the ARDL bounds approach yields empirical evidence that confirms the existence of long run relationship between energy price, technological progress, economic structure, energy mix, and energy intensity. The results show that technological progress is an important driver for the declining energy intensity in short and long run. Energy price has not been demonstrated as an important role in decreasing energy intensity in the short run. The high share of coal use in total energy use may be responsible for China's high energy ***, the relative change in economic sectors plays a minor role in energy intensity reduction during the past years. In the long run, technological progress, energy mix and energy prices Granger cause energy intensity, but not vice versa except for the energy mix.

关键词： Energy intensity ARDL bounds approach China

Zeptomole Imaging of Cytosolic MicroRNA Cancer Biomarkers with A Light-Controlled Nanoantenna

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Nano-Micro Letters 2021年第12期13卷 468-482页

作者： Yang Song Xiaoli Cai Grayson Ostermeyer Shichao Ding dan du Yuehe Lin School of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164USA Nanosong Systems LLC RedmondWA 98052USA School of Biological Sciences Washington State UniversityPullmanWA 99164USA

Detecting and quantifying intracellular microRNAs(miRNAs)are a critical step in resolving a cancer diagnostic and resolving the ensemble of gene products that orchestrate the living state of ***,the nanoprobe for detecting low abundance miRNAs in cell cytosol is restricted by either the"one-to-one"signaltrigger model or di culty for cytosol *** address these challenges,we designed a lightharvesting nanoantenna-based nanoprobe,which directs excitation energy to a single molecule to sensitively detect cytosolic *** light irradiation,the light-harvesting nanoantenna e ectively disrupted lysosomal structures by generationof reactive oxygen species,substantially achieved cytosol *** nanoantenna containing>4000 donor dyes can e ciently transfer excitation energy to one or two acceptors with 99%e ciency,leading to unprecedented signal amplification and biosensing *** designed nanoantenna can quantify cytosolic miR-210 at zeptomolar *** fluorescence lifetime of the donor exhibited good relationship with miR-210 concentration in the range of 0.032 to 2.97 amol/*** zeptomole sensitivity of nanoantenna provides accurate bioimaging of miR-210 both in multiple cell lines and in vivo assay,which creates a pathway for the creation of miRNA toolbox for quantitative epigenetics and personalized medicine.

关键词： Light-harvest Nanoantenna miRNA detection Zeptomole Multiple cell lines

Assembly of highly efficient aqueous light-harvesting system from sequence-defined peptoids for cytosolic microRNA detection

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Nano Research 2024年第2期17卷 788-796页

作者： Yang Song Xiaoli Cai Mingming Wang dan du Yuehe Lin Chun-Long Chen Department of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164USA Division of Physical Sciences Pacific Northwest National LaboratoryRichlandWA 99352USA Department of Chemical Engineering University of WashingtonSeattleWA 98195USA

Precisely controlled spatial distributions of artificial light-harvesting systems in aqueous media are of significant importance for mimicking natural light-harvesting systems;however,they are often restrained by the solubility and the aggregation-caused quenching effect of the hydrophobic ***,we report one highly efficient artificial light-harvesting system based on peptoid nanotubes that mimic the hierarchical cylindrical structure of natural *** high crystallinity of these nanotubes enabled the organization of arrays of donor chromophores with precisely controlled spatial distributions,favoring an efficient Förster resonance energy transfer(FRET)process in aqueous *** FRET system exhibits an extremely high efficiency of 98.6%with a fluorescence quantum yield of 40%and an antenna effect of *** further demonstrated the use of this artificial light-harvesting system for quantifying miR-210 within cancer *** fluorescence intensity ratio of donor to acceptor is linearly related to the concentration of intercellular miR-210 in the range of 3.3–156 copies/*** high sensitivity in intracellular detection of miR-210 using this artificial light-harvesting system offers a great opportunity and pathways for biological imaging and detection,and for the further creation of microRNA(miRNA)toolbox for quantitative epigenetics and personalized medicine.

关键词： light-harvesting peptoid nanotube Förster resonance energy transfer intracellular RNA detection

Stimulants and donors promote megaplasmid pND6-2 horizontal gene transfer in activated sludge

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Journal of Environmental Sciences 2023年第4期126卷 742-753页

作者： Shan Wang Shanshan Li dan du Olusegun KAbass Muhammad Salman Nasir Wei Yan Department of Environmental Science and Engineering Xi’an Key Laboratory of Solid Waste Recycling and Resource RecoveryXi’an Jiaotong UniversityXi’an 710049China School of Civil and Environmental Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Structures and Environmental Engineering University of AgricultureFaisalabad 38040Pakistan

The activated sludge process is characterized by high microbial density and diversity,both of which facilitate antibiotic resistance gene *** studies have suggested that antibiotic and non-antibiotic drugs at sub-inhibitory concentrations are major inducers of conjugative gene *** self-transmissible plasmid pND6-2 is one of the endogenous plasmids harbored in Pseudomonas putida ND6,which can trigger the transfer of another co-occurring naphthalene-degrading plasmid ***,to illustrate the potential influence of stimulants on conjugative transfer of pND6-2,we evaluated the effects of four antibiotics (ampicillin,gentamycin,kanamycin,and tetracycline) and naphthalene,on the conjugal transfer efficiency of pND6-2 by filter-mating *** findings demonstrated that all stimulants within an optimal dose promoted conjugative transfer of pND6-2from Pseudomonas putida GKND6 to *** KT2440,with tetracycline being the most effective (100μg/L and 10μg/L),as it enhanced pND6-2-mediated intra-genera transfer by approximately one ***,seven AS reactors were constructed with the addition of donors and different stimulants to further elucidate the conjugative behavior of pND6-2 in natural *** stimulants positively affected the conjugal process of pND6-2,while donors reshaped the host abundance in the *** was likely because stimulant addition enhanced the expression levels of conjugation transfer-related ***,Blastocatella and Chitinimonas were identified as the potential receptors of plasmid pND6-2,which was not affected by donor *** findings demonstrate the positive role of sub-inhibitory stimulant treatment on pND6-2 conjugal transfer and the function of donors in re-shaping the host spectrum of pND6-2.

关键词： Antibiotics Naphthalene Donor Conjugative transfer Host range

Rapid detection of intestinal pathogens in fecal samples by an improved reverse dot blot method

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World Journal of Gastroenterology 2009年第20期15卷 2537-2542页

作者： Jian-Ming Xing Su Zhang Ying du dan Bi Li-Hui Yao Huzhou Maternity and Child Care Hospital Huzhou 313000 Zheiiang Province China

AIM:To develop a new, rapid and accurate reverse dot blot(RDB) method for the detection of intestinal pathogens in fecal ***:The 12 intestinal pathogens tested were Salmonella spp., Brucella spp., Escherichia coli O157:H7, Clostridium botulinum , Bacillus cereus , Clostridium perfringens , Vibrio parahaemolyticus , Shigella spp., Yersinia enterocolitica, Vibrio cholerae, Listeria monocytogenes and Staphylococcus *** two universal primers were designed to amplify two variable regions of bacterial 16S and 23S rDNA genes from all of the 12 bacterial species *** hundred and forty fecal samples from the diarrhea patients were detected using the improved RDB ***:The methods could identify the 12 intestinal pathogens specifi cally, and the detection limit was as low as 103 *** consistent detection rate of the improved RDB assay compared with the traditional culture method was up to 88.75%.CONCLUSION:The hybridization results indicated that the improved RDB assay developed was a reliable method for the detection of intestinal pathogen in fecal samples.

关键词： Immunoblotting Intestinal pathogens Feces

Energy unidirectional transmission in an asymmetrically finite transmission line

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Chinese Physics B 2012年第1期21卷 187-191页

作者： Tao Feng Chen Wei-Zhong Xu Wen du Si-dan Key Laboratory of Modern Acoustics of Ministry of Education and Institute of AcousticsNanjing UniversityNanjjng 210093China School of Electrical Engineering&Information Anhui University of TechnologyMa'anshan 243002China School of Electronic Science and Engineering Nanjing UniversityNanjing 210093China

The phenomenon of energy unidirectionM transmission is numerically investigated by using a system of two coupled discrete nonlinear electrical transmission lines, each line of the network contains a finite number of cells and has different pass band structures, respectively. Using numerical simulations, we examine the frequency multiplication of the driving frequency and the lattice filtering effect in the line. These lead to the generation of energy unidirectional transmission. In the present work, energy is carried by the second harmonic wave in the pass band. In addition, we also study the dependence of the energy efficiency on the driving amplitude and other parameters of the model, such as the system size and the nonlinear coefficient, by calculation. Furthermore, after detailed numerical simulation, an experimental demonstration is realized. The experimental results agree with those in simulation qualitatively.

关键词： energy unidirectional nonlinear transmission line linear wave

Ridge-furrow rainwater harvesting with supplemental irrigation to improve seed yield and water use efficiency of winter oilseed rape(Brassica napus L.)

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Journal of Integrative Agriculture 2017年第5期16卷 1162-1172页

作者： GU Xiao-bo LI Yuan-nong du Ya-dan YIN Min-hua College of Water Resources and Architectural Engineering Northwest A&F University/Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid AreaMinistry of EducationYangling 712100P.R.China

Ridge-furrow rainwater harvesting （RFRH） planting pattern can lessen the effect of water deficits throughout all crop growth stages, but water shortage would remain unavoidable during some stages of crop growth in arid and semiarid areas. Supplemental irrigation would still be needed to achieve a higher production. Field experiments were conducted for two growing seasons （2012-2013 and 2013-2014）to determine an appropriate amount of supplemental irrigation to be applied to winter oilseed rape at the stem-elongation stage with RFRH planting pattern. Four treatments, including supplemental irrigation amount of 0 （I1）, 60 mm （I2） and 120 mm （I3） with RFRH planting pattern and a control （CK） irrigated with 120 mm with flat planting pattern, were set up to evaluate the effects of supplemental irrigation on aboveground dry matter （ADM）, nitrogen nutrition index （NNI）, radiation use efficiency （RUE）, water use efficiency （WUE）, and seed yield and oil content of the oilseed rape. Results showed that supplemental irrigation improved NNI, RUE, seed yield and oil content, and WUE. However, the NNI, RUE, seed yield and oil content, and WUE did not increase significantly or even showed a downward trend with excessive irrigation. Seed yield was the highest in 13 for both growing seasons. Seed yield and WUE in 13 averaged 3235 kg ha^-1 and 8.85 kg ha^-1 mm-1, respectively. The highest WUE was occurred in 12 for both growing seasons. Seed yield and WUE in 12 averaged 3089 kg ha^-1 and 9.63 kg ha^-1 mm^-1, respectively. Compared to 13, 12 used 60 mm less irrigation amount, had an 8.9% higher WUE, but only 4.5 and 0.4% lower seed yield and oil content, respectively. 12 saved water without substantially sacrificing yield or oil content, so it is recommended as an appropriate cultivation and irrigation schedule for winter oilseed rape at the stem-elongation stage.

关键词： ridge-furrow rainwater harvesting (RFRH) supplemental irrigation winter oilseed rape seed yield oil content water use efficience (WUE)

Combined sevoflurane-dexmedetomidine and nerve blockade on post-surgical serum oxidative stress biomarker levels in thyroid cancer patients

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World Journal of Clinical Cases 2022年第10期10卷 3027-3034页

作者： dan du Qiao Qiao Zheng Guan Yan-Feng Gao Qiang Wang Department of Anesthesiology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina

BACKGROUND The incidence of thyroid cancer is increasing *** routine thyroid surgery can be performed under a cervical plexus block,but cannot mediate the stress response during the *** thyroid surgery is performed under nerve block,an inappropriate level of blockade may ***,the stress response caused by surgery is more serious than that caused by conventional ***,it is important to combine blockade with more effective anesthesia *** To investigate the effects of combining sevoflurane-dexmedetomidine inhalation general anesthesia with the cervical plexus nerve block on the post-surgical levels of the serum oxidative stress biomarkers levels in thyroid cancer *** We enrolled 96 thyroid cancer patients admitted to the hospital between January 2019 and December *** were divided into a control group(n=47)and an experimental group(n=49).The experimental group received a combination of inhaled sevoflurane-dexmedetomidine and cervical plexus block,while the control group received conventional general *** groups were compared for serum levels of monocyte chemotactic protein-1(MCP-1)and glutathione peroxidase(GSH-Px)before and after surgery,and the adrenocorticotropic hormone(ACTH)and norepinephrine(NE)levels at 1 and 12 h *** Bispectral index(BIS)and the incidence of anesthesia side effects were also *** Following surgery,MCP-1 was significantly lower in the experimental group compared to the control group,whereas GSH-Px was significantly higher than that in the control group(P<0.001).The serum ACTH and NE levels were significantly lower in the experimental group than those the control group at 1 and 12 h post-surgery(P<0.001).BIS was significantly lower in the experimental group than that in the control group at 20 minutes into the operation,but the direction of the difference was reversed at eye opening(P<0.001).The incidence of side effects was 10.20%(

关键词： Sevoflurane Dexmedetomidine Cervical plexus block Thyroid cancer Anesthesia Side-effects

Utilizing comprehensive decision analysis methods to determine an optimal planting pattern and nitrogen application for winter oilseed rape

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Journal of Integrative Agriculture 2020年第9期19卷 2229-2238页

作者： du Ya-dan CUI Bing-jing ZHANG Qian SUN Jun WANG Zhen NIU Wen-quan Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Area of Ministry of Education/Northwest A&F University Yangling 712100P.R.China

Oilseed rape is one of the most important oil crops *** the appropriate cultivation method(planting pattern and nitrogen level)is necessary to achieve high yield,quality and resource utilization ***,the optimal method for oilseed rape varies across countries and *** objective of the present study was to determine an appropriate cultivation method,including planting pattern and nitrogen application,for winter oilseed rape in northwestern *** planting patterns:ridge film mulching and furrow planting(RFMF)and flat planting(FP),and six nitrogen(N)amounts:0(N0),60(N60),120(N120),180(N180),240(N240),and 300(N300)kg N ha–1 were applied across three growing seasons(2014–2017).Three comprehensive decision analysis methods:principal component analysis,grey correlation degree analysis and the combined entropy weight and dynamic technique for order preference by similarity to ideal solution method were used to evaluate the growth and physiological indicators,nutrient uptake,yield,quality,evapotranspiration,and water use efficiency of winter oilseed *** pattern,nitrogen amount and their interaction significantly affected the indicators *** RFMF pattern significantly increased all indicators over the FP *** of N also markedly increased all the indicators except for seed oil content,but the yield,oil production and water use efficiency were decreased when N fertilizer exceeded 180 kg N ha–1 under FP and 240 kg N ha–1 under *** evaluation results of the three comprehensive decision analysis methods indicated that RFMF planting pattern with 240 kg N ha–1 is an appropriate cultivation method for winter oilseed rape in northwestern *** findings are of vital significance to maximize yield,optimize quality and improve resource use efficiencies of winter oilseed rape.

关键词： appropriate cultivation method comprehensive decision analysis method northwestern China winter oilseed rape