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Frontiers of Environmental Science & Engineering 2011年第2期5卷 277-282页

作者： Nanqi REN han kang Xiuheng WANG Nan LI State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Sequencing batch reactor(SBR)for enhanced biological phosphorus removal(EBPR)processes was used to investigate the impact of the temperature shock on the competition between phosphorus-accumulating organisms(PAOs)and glycogen accumulating organisms(GAOs)in start-up *** the 34 days operation,SBR was set with temperature variation(0-5 d,22±1℃;6-13 d,29±1℃;14-34 d,14±1℃).PAOs and GAOs were analyzed by fluorescent in situ hybridization(FISH),and intracellular polyphosphate granules were stained by *** results showed that the influence of temperature shock on PAOs’abundance was more serious than that on GAOs in the enriching *** sudden and substantially temperature variation,from 22±1℃ to 29±1℃ and then to 14±1℃,the domination of PAOs was *** temperature shock,PAOs’competitive advantages at low temperature that concluded in other study did not appear in our *** mesophilic,GAOs(indicated by Alphaproteobacteria and Gammaproteobacteria)were more temperature adaptive and better grew and took the domination at 14±1℃ in the *** the competition process,organisms of tetrad forming organisms(TFOs)-like shape which were considered as typical GAOs,were *** the evidence of poly-P granules containing by Neisser-straining and result of FISH,these organisms of TFOs-like shape were better to be assumed as adaption state or a special self-protecting shape of PAOs.

关键词： fluorescent in situ hybridization(FISH) tetrad forming organisms(TFOs) temperature variation enhanced biological phosphorus removal(EBPR)

Novel way of patent foramen ovale detection and percutaneous closure by intracardiac echocardiography:A case report

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World Journal of Clinical Cases 2022年第29期10卷 10559-10564页

作者： kang-Ning han Shi-Wei Yang Yu-Jie Zhou Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijing 100029China

BACKGROUND Patent foramen ovale(PFO)is the most common congenital heart disease and is associated with several diseases,including stroke and *** diagnosis involves transoesophageal echocardiography,transthoracic echocardiography,and transcranial *** studies have shown that intracardiac echocardiography(ICE)can be used to diagnose and guide percutaneous transcatheter *** SUMMARY A 70-year-old male presented with paroxysmal dizziness and limb weakness for the past 3 *** resonance imaging revealed a history of stroke,and a bubble test revealed the presence of *** patient was then transferred to our hospital for PFO *** ICE guidance,the separation of the septum primum and septum secundum was unclear;we then used a Swartz catheter to confirm PFO by applying physical pressure on the right part of the atrial septum without using any *** ICE continuously and clearly guided the *** ICE can guide PFO closure in patients with a history of *** PFO is not evident under ICE,a Swartz catheter can be used.

关键词： Intracardiac echocardiography Patent foramen ovale Percutaneous patent foramen ovale closure Case report

Blood flow of an Oldroyd-B fluid in a blood vessel incorporating a Brownian stress

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Science China(Physics,Mechanics & Astronomy) 2012年第1期55卷 125-131页

作者： ZAMAN Gul ISLAM S. kang Yong han JUNG Il Hyo Department of Mathematics University of Malakand Chakdara Dir（Lower） Khyber Puhtoonkhwa Pakistan Department of Mathematics COMSATS IIT H-8/1 lslamabad Pakistan Department of Mathematics Pusan National University Busan 609-735 South Korea

The mechanical behavior of non-Newtonian fluids can be modeled by several constitutive differential equations. The Oldroyd model is viewed as one of the successful models for describing the response of a subclass of polymeric liquids, in particular the non-Newtonian behavior exhibited by these fluids. In this paper, we are concerned with the study of the unsteady flows of an incom-pressible viscoelastic fluid of an Oldroyd-B type in a blood vessel acting on a Brownian force. First we derive the orientation stress tensor considering Hookean dumbbells on Brownian configuration fields. Then we reformulate the three-dimensional Oldroyd-B model with the total stress tensor which consists of the isotropic pressure stress tensor, the shear stress tensor, and the orientation stress tensor. Finally we present the numerical simulations of the model and analyze the effect of the orientation stress tensor in the vessel.

关键词： fluid flow total and orientation stress tensor Hemodynamics mathematical models

Nanostructured Ni-MoCx:An efficient non-noble metal catalyst for the chemoselective hydrogenation of nitroaromatics

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Nano Research 2023年第7期16卷 8919-8928页

作者： Yifei Zhang Zhiwen Li Jingjing Zhang Liangliang Xu Zhong-kang han Alfons Baiker Gao Li Institute of Catalysis for Energy and Environment College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang 110034China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Department of Chemistry and Applied Biosciences Institute for Chemical and BioengineeringETH ZurichHönggerbergHClZurich CH-8093Switzerland University of Chinese Academy of Sciences Beijing 100049China

Catalysts for chemoselective hydrogenation are of vital importance for the synthesis of various important chemicals and *** we developed a simple method for preparing a highly efficient Ni-MoC_(x)nanocomposite catalyst via temperature-programmed carburization of a polyoxometalate precursor.X-ray diffraction(XRD),scanning transmission electron microscopy(STEM),X-ray photoelectron spectroscopy(XPS),and X-ray absorption spectroscopy(XAS)analyses indicate that the resulting mesoporous nanocomposite catalyst is made up of well-dispersed metallic nickel particles embedded in a MoC_(x)*** catalyst exhibits high activity and selectivity(>99%)in the hydrogenation of various substituted nitroaromatics to corresponding *** high efficiency is attributed to the intimate contact of the constituents favoring electron transfer and hydrogen *** is physisorbed on the carbide support and dissociates on the nickel particles,as evidenced by Mo K-edge X-ray absorption near-edge structure(XANES)spectra,density functional theory(DFT),and hydrogen-deuterium *** remarkable catalytic performance of the catalyst could be traced back to the synergistic interaction between the Ni particles and the carbide ***-situ infrared spectroscopy and DFT simulations indicated that the adsorption/activation of the nitro group is favored compared to that of other substituents at the aromatic *** recyclability tests,the Ni-MoC_(x)nanocomposite showed no significant loss of catalytic performance in seven consecutive runs,indicating its robust nature.

关键词： Ni-MoC_(x)nanocomposite carburization of polyoxometalate hydrogenation nitroaromatics synergistic effect

Intracardiac echocardiography in the diagnosis and closure of patent foramen ovale

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Journal of Geriatric Cardiology 2021年第9期18卷 697-701页

作者： kang-Ning han Xiao-Teng MA Shi-Wei YANG Yu-Jie ZHOU Beijing Anzhen Hospital Capital Medical UniversityBeijing Institute of HeartLung and Blood Vessel DiseaseThe Key Laboratory of Remodeling-related Cardiovascular DiseaseMinistry of EducationBeijingChina

Patent foramen ovale(PFO)which is caused by failed fusion of septum primum and septum secundum,is the first leading congenital heart abnormality,affecting about 25%of the general population.

关键词： population. closure diagnosis

Encapsulating segment-like antimony nanorod in hollow carbon tube as long-lifespan,high-rate anodes for rechargeable K-ion batteries

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Nano Research 2019年第5期12卷 1025-1031页

作者： Wen Luo Feng Li Weiran Zhang kang han Jean-Jacques Gaumet hans-Eckhardt Schaefer Liqiang Mai Department of Physics School of ScienceWuhan University of TechnologyWuhan 430070China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230000China Division of Materials Science and Engineering Boston UniversityMA 02215USA State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Technology Wuhan University of TechnologyWuhan 430070China Laboratoire de Chimie et Physique: Approche Multi-echelles des Milieux Complexes Institut Jean BarriolUniversite de LorraineMetz 57070France Institute for Functional Matter and Quantum Technologies Stuttgart UniversityPfaffenwaldring 57Stuttgart 70569Germany

K-ion battery (KIB) is a new-type energy storage device that possesses potential advantages of low-cost and abundant resource of *** develop advanced electrode materials for accommodating the large size and high activity of potassium ion is of great ***,a segment-like antimony (Sb) nanorod encapsulated in hollow carbon tube electrode material (Sb@HCT) was *** from the virtue of abundant nitrogen doping in carbon tube,one-dimensional and hollow structure advantages,Sb@HCT exhibits excellent potassium storage properties:in the case of potassium bis(fluorosulfonyl)imide (KFSI) electrolyte,Sb@HCT displays a reversible capacity of up to 453.4 mAh·g^-1 at a current density of 0.5 A·g^-1 and good rate performance (a capacity of 211.5 mAh·g^-1 could be achieved at an ultrahigh rate of 5 A·g^-1).Additionally,Sb@HCT demonstrates excellent long-cycle stability at a current density of 2 A·g^-1 over 120 ***,electrolyte optimization is an effective strategy for greatly improving electrochemical *** ex-situ characterizations,we disclosed the potassiation of Sb anode is quite reversible and undergoes multistep processes,combining solid solution reaction and two-phase reaction.

关键词： K-ion battery antimony anode hollow carbon tube encapsulation electrolyte optimizati on potassium storage mechanism

A nonsensory odorant-binding protein plays an important role in the larval development and adult mating of Spodoptera frugiperda

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Insect Science 2023年第5期30卷 1325-1336页

作者： Wei-kang han Feng-Xian Tang Na Yu Yi-Xi Zhang Ze-Wen Liu Key Laboratory of Integrated Management of Crop Diseases and Pests(Ministry of Education) College of Plant ProtectionNanjing Agricultural UniversityNanjingChina

Odorant-binding proteins (OBPs) play key roles in the perception of semiochemicals in insects. Several OBPs in insect olfactory systems have been functionally characterized, and they provide excellent targets for pest control. The functions of some OBPs that are highly expressed in the nonsensory organs of insects remain unclear. Here, the physiological function of an OBP (OBP27) that was highly expressed in the nonsensory organs of Spodoptera frugiperda was studied. OBP27 was nested within the Plus-C cluster according to phylogenetic analysis. The transcription of OBP27 steadily increased throughout the development of S. frugiperda, and transcripts of this gene were abundant in the fat body and male reproductive organs. An OBP27 knockout strain with an early frameshift mutation was obtained using the clustered regularly interspaced palindromic repeats (CRISPR) / CRISPR-associated protein 9 (Cas9) system. The development time of OBP27^(−/−) larvae was significantly longer than that of other larvae. Both male and female OBP27^(−/−) pupae weighed significantly less than wild-type (WT) pupae. In crosses of OBP27^(−/−) males or females, the mating rate was lower and the mating duration was longer for OBP27^(−/−) male–WT female pairs than for WT–WT pairs. By contrast, the mating rate, hatching rate, and number of eggs of OBP27^(−/−) female–WT male pairs and WT–WT pairs were similar. These findings indicate that OBP27 plays an important role in the larval development and mating process in male adults. Generally, our findings provide new insights into the physiological roles of nonsensory OBPs.

关键词： CRISPR/Cas9 nonsensory OBP reproduction Spodoptera frugiperda

Size hierarchy of gold clusters in nanogold-catalyzed acetylene hydrochlorination

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Nano Research 2024年第11期17卷 9594-9600页

作者： Yifei Zhang Xinrui Gu Fatimah Kehinde Busari Sami Barkaoui Zhong-kang han Alfons Baiker Zhen Zhao Gao Li Institute of Catalysis for Energy and Environment College of Chemistry and Chemical Engineering Shenyang Normal University Shenyang 110034 China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China School of Materials Science and Engineering Zhejiang University Hangzhou 310000 China Department of Chemistry and Applied Biosciences ETH Hönggerberg HCI CH-8093 Zurich Switzerland University of Chinese Academy of Sciences Beijing 100049 China

Size hierarchy is a distinct feature of nanogold-catalysts as it can strongly affect their performance in various reactions. We developed a simple method to generate Au n S m nanoclusters of different sizes by thermal treatment of an Au144(PET)60 (PET: phenylethanethiol) parent cluster. These clusters, deposited on activated carbon, exhibit excellent catalytic performance in the hydrochlorination of acetylene. In-situ ultraviolet laser dissociation high-resolution mass spectrometry of the parent cluster in the presence of acetylene revealed a remarkable cluster size-dependence of acetylene adsorption, which is a crucial step in the hydrochlorination. Systematic density functional theory calculations of the reaction pathways on the differently-sized clusters provide deeper insight into the cluster size dependence of the adsorption energies of the reactants and afforded a scaling relationship between the adsorption energy of acetylene and the co-adsorption energies of the reactants (C_(2)H_(2) and HCl), which could enable a qualitative prediction of the optimal Au n S m cluster for the hydrochlorination of acetylene.

关键词： gold clusters size hierarchy AunSm acetylene hydrochlorination scaling relationship

Enhanced Performance of Denitrifying Sulfide Removal Process by 1,2-Naphthoquinone-4-Sulphonate

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China Petroleum Processing & Petrochemical Technology 2016年第1期18卷 22-28页

作者： Liu Chunshuang han kang Zhao Dongfeng Guo Yadonag Liu Lihong Liu Fang Zhao Chaocheng College of Chemical Engineering China University of PetroleumQingdao School of Earth Sciences Northeast Petroleum University

The denitrifying sulfide removal(DSR) process with bio-granules comprising both heterotrophic and autotrophic denitrifiers can simultaneously convert nitrate, sulfide and acetate species into di-nitrogen gas, elemental sulfur and carbon dioxide, respectively, at high loading rates. This study has determined that the reaction rate of sulfide oxidized into sulfur could be enhanced in the presence of 1,2-naphthoquinone-4-sulphonate(NQS). The presence of NQS mitigated the inhibition effects of sulfide species on denitrification. Furthermore, the reaction rates of nitrate and acetate to nitrogen gas and CO_2, respectively, were also promoted in the presence of NQS, thereby enhancing the performance of DSR granules. The advantages and disadvantages of applying the NQS-DSR process are discussed.

关键词： denitrifying sulfide removal NQS inhibition bio-granules

Continuous dimethyl carbonate synthesis from CO_(2) and methanol over Bi_(x)Ce_(1-x)O_(δ) monoliths:Effect of bismuth doping on population of oxygen vacancies,activity,and reaction pathway

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Nano Research 2022年第2期15卷 1366-1374页

作者： Yongdong Chen Yue Li Wei Chen Wen Wu Xu Zhong-kang han Ammara Waheed Zhongbin Ye Gao Li Alfons Baiker College of Chemistry and Chemical Engineering Southwest Petroleum UniversityChengdu 610500China School of Physical Science and Technology Ningbo UniversityNingbo 315211China Center for Energy Science and Technology Skolkovo Institute of Science and TechnologySkolkovo Innovation CenterMoscow 143026Russia State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China ETH Zurich Department of Chemistry and Applied BiosciencesInstitute for Chemical and BioengineeringHonggerbergHClCH-8093 ZurichSwitzerland

We evaluated bismuth doped cerium oxide catalysts for the continuous synthesis of dimethyl carbonate(DMC)from methanol and carbon dioxide in the absence of a dehydrating ***_(x)Ce_(1-x)O_(δ)nanocomposites of various compositions(x=0.06-0.24)were coated on a ceramic honeycomb and their structural and catalytic properties were *** incorporation of Bi species into the CeO_(2) lattice facilitated controlling of the surface population of oxygen vacancies,which is shown to play a crucial role in the mechanism of this reaction and is an important parameter for the design of ceria-based *** DMC production rate of the Bi_(x)Ce_(1-x)O_(δ) catalysts was found to be strongly enhanced with increasing Ov *** concentration of oxygen vacancies exhibited a maximum for Bi_(0.12)Ce_(0.88)O_(δ),which afforded the highest DMC production ***-term tests showed stable activity and selectivity of this catalyst over 45 h on-stream at 140°C and a gas-hourly space velocity of 2,880 mL·g_(cat)^(-1)·h^(-1).In-situ modulation excitation diffuse reflection Fourier transform infrared spectroscopy and first-principle calculations indicate that the DMC synthesis occurs through reaction of a bidentate carbonate intermediate with the activated methoxy(-OCH_(3))*** activation of C0_(2) to form the bidentate carbonate intermediate on the oxygen vacancy sites is identified as highest energy barrier in the reaction pathway and thus is likely the rate-determining step.

关键词： dimethyl carbonate synthesis bismuth-cerium oxides monolithic catalyst oxygen vacancies reaction mechanism