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Nanostructure and thermal power of highly-textured and single-crystal-like Bi_(2)Te_(3) thin films

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Nano Research 2022年第3期15卷 2382-2390页

作者： Heng Zhang Jamo Momand Joshua Levinsky Qikai Guo Xiaotian Zhu Gert H ten Brink Graeme R.Blake George Palasantzas bart J.Kooi Zernike Institute for Advanced Materials University of GroningenNijenborgh 49747 AG GroningenThe Netherlands

Bi_(2)Te_(3)-based alloys are known to have outstanding thermoelectric *** structure–property relations have been studied,still,detailed analysis of the atomic and nano-scale structure of Bi_(2)Te_(3)thin film in relation to their thermoelectric properties remains poorly ***,highly-textured(HT)and single-crystal-like(SCL)Bi_(2)Te_(3)films have been grown using pulsed laser deposition(PLD)on Si wafer covered with(native or thermal)SiOx and mica *** films are highly textured with c-axis out-of-plane,but the in-plane orientation is random for the films grown on oxide and single-crystal-like for the ones grown on *** power factor of the film on thermal oxide is about four times higher(56.8μW·cm^(−1)·K^(−2))than that of the film on mica(12.8μW·cm^(−1)·K^(−2)),which is comparable to the one of the polycrystalline ingot at room temperature(RT).Reduced electron scattering in the textured thin films results in high electrical conductivity,where the SCL film shows the highest ***,its Seebeck coefficient shows a low *** measured properties are correlated with the atomic structure details unveiled by scanning transmission electron *** instance,the high concentration of stacking defects observed in the HT film is considered responsible for the increase of Seebeck coefficient compared to the SCL *** study demonstrates the influence of nanoscale structural effects on thermoelectric properties,which sheds light on tailoring thermoelectric thin films towards high performance.

关键词： Bi_(2)Te_(3)films highly-textured structure single-crystal-like structure thermoelectric properties pulsed laser deposition

Linking axon transport to regeneration using in vitro laser axotomy

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Neural Regeneration Research 2018年第3期13卷 410-412页

作者： bart Nieuwenhuis Richard Eva John van Geest Centre for Brain Repair Department of Clinical Neurosciences University of Cambridge Cambridge UK Laboratory for Regeneration of Sensorimotor Systems Netherlands Institute for Neuroscience Royal Netherlands Academy of Arts and Sciences (KNAW) Amsterdam The Netherlands

Spinal cord injury has devastating consequences because adult central nervous system （CNS） neurons do not regenerate their axons after injury. Two key reasons for axon regeneration fail- ure are extrinsic inhibitory factors and a low intrinsic capacity for axon regrowth. Research has therefore focused on overcom- ing extrinsic growth inhibition, and enhancing intrinsic regeneration capacity. Both of these issues will need to be addressed to enable optimal repair of the injured sp＋inal cord.

关键词： CNS ARF Linking axon transport to regeneration using in vitro laser axotomy EFA

Numerical analysis of hydroabrasion in a hydrocyclone

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Petroleum Science 2016年第2期13卷 304-319页

作者： Mehdi Azimian Hans-Jorg bart Department of Mechanical and Process Engineering University of Kaiserslautern 67663 Kaiserslautern Germany

The velocity profiles and separation efficiency curves of a hydrocyclone were predicted by an Euler-Euler approach using a computational fluid dynamics tool ANSYS-CFX 14.5. The Euler-Euler approach is capable of considering the particle-particle interactions and is appropriate for highly laden liquid-solid mixtures. Pre- dicted results were compared and validated with experi- mental results and showed a considerably good agreement. An increase in the particle cut size with increasing solid concentration of the inlet mixture flow was observed and discussed. In addition to this, the erosion on hydrocyclone walls constructed from stainless steel 410, eroded by sand particles （mainly SiOz）, was predicted with the Euler-La- grange approach. In this approach, the abrasive solid particles were traced in a Lagrangian reference frame as discrete particles. The increases in the input flow velocity, solid concentration, and the particle size have increased the erosion at the upper part of the cylindrical body of the hydrocyclone, where the tangential inlet flow enters the hydrocyclone. The erosion density in the area between the cylindrical to conical body area, in comparison to other parts of the hydrocyclone, also increased considerably. Moreover, it was observed that an increase in the particle shape factor from 0.1 to 1.0 leads to a decrease of almost 70 % in the average erosion density of the hydrocyclone wall surfaces.

关键词： Hydrocyclone Computational fluiddynamicS (CFD) Separation efficiency - Erosion rateErosion impact parameters

CFD Analysis of Can Heating Process

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Fluid Dynamics & Materials Processing 2022年第4期18卷 1129-1136页

作者： David Alonso de Mezquia Uxue Arrieta MMounir Bou-Ali Ferruh Erdogdu Huseyin Topcam bart Van Droogenbroeck Dagbjørn Skipnes Mechanical and Industrial Manufacturing Department Engineering Faculty of Mondragon UnibertsitateaMondragon20500Spain Department of Food Engineering Ankara UniversityGolbasi KampusuGolbasiAnkara06830Turkey Institute for Agricultural Fisheries and Food Research ILVOMerelbeke9820Belgium NOFIMA Research Center Stavanger4068Norway

In this work,the thermal sterilization process in food cans has been analyzed using Computational Fluid Dynamics(CFD).STAR CCM+software has been used in order to develop a numerical model to study the heating process of standard and the recently proposed toroidal shaped *** model has been validated comparing the results with the ones obtained experimentally and numerically that can be found in the literature.A good agreement between the obtained numerical results and the experimental ones has been *** results also agree with other numerical models previously developed in the *** the model has been validated,taking advance of the possibility to easily introduce movement in the simulations,new variables have been analyzed in the system using this model,such as rotational movement of the *** model developed has been used to study the efficiency of the sterilization process with the two types of cans by means of calculating the temperature inside the systems and calculating the F0 *** can be seen that the efficiency of the sterilization process is better in the toroidal *** has been also checked that CFD models can be very helpful in analyzing the temperature profiles inside the cans and making sure that the correct temperature has been obtained inside the can and the sterilization process has been correctly carried out.

关键词： Toroidal can heat transfer CFD retor

Predicting nitrogen use efficiency,nitrogen loss and dry matter intake of individual dairy cows in late lactation by including mid‑infrared spectra of milk samples

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Journal of Animal Science and Biotechnology 2023年第3期14卷 1287-1299页

作者： Rui Shi Wenqi Lou bart Ducro Aart van der Linden Han A.Mulder Simon J.Oosting Shengli Li Yachun Wang Laboratory of Animal Genetics Breeding and ReproductionMinistry of Agriculture of ChinaNational Engineering Laboratory of Animal BreedingCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Wageningen University&Research Animal Breeding and Genomics P.O.Box 3386700 AH Wageningenthe Netherlands Animal Production System Group Wageningen University&ResearchP.O.Box 3386700 AH Wageningenthe Netherlands

Background Nitrate leaching to groundwater and surface water and ammonia volatilization from dairy farms have negative impacts on the ***,the increasing demand for dairy products will result in more pollution if N losses are not ***,a more efficient,and environmentally friendly production system is needed,in which nitrogen use efficiency(NUE)of dairy cows plays a key *** genetically improve NUE,extensively recorded and cost-effective proxies are essential,which can be obtained by including mid-infrared(MIR)spectra of milk in prediction models for *** study aimed to develop and validate the best prediction model of NUE,nitrogen loss(NL)and dry matter intake(DMI)for individual dairy cows in *** A total of 86 lactating Chinese Holstein cows were used in this *** data editing,704 records were obtained for calibration and *** prediction models with three different machine learning algorithms and three kinds of pre-processed MIR spectra were developed for each *** showed that the coefficient of determination(R2)of the best model in within-herd validation was 0.66 for NUE,0.58 for NL and 0.63 for *** external validation,reasonable prediction results were only observed for NUE,with R2 ranging from 0.58 to 0.63,while the R2 of the other two traits was below *** infrared waves from 973.54 to 988.46 cm−1 and daily milk yield were the most important variables for *** The results showed that individual NUE can be predicted with a moderate accuracy in both within-herd and external *** model of NUE could be used for the datasets that are similar to the calibration *** prediction models for NL and 3-day moving average of DMI(DMI_a)generated lower accuracies in within-herd *** also indicated that information of MIR spectra variables increased the predictive ability of ***,pre-processed MIR spectra do not result in higher acc

关键词： Dairy cow Environment Mid-infrared spectra Nitrogen use efficiency Prediction

Three-dimensional printing in paediatric orthopaedic surgery

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World Journal of Orthopedics 2022年第1期13卷 1-10页

作者： Sven Goetstouwers Dagmar Kempink Bertram The Denise Eygendaal bart van Oirschot Christiaan JA van Bergen Department of Orthopaedic Surgery and Sports Medicine Erasmus Medical Centre/Sophia Children's HospitalRotterdam 3015GDSouth-HollandNetherlands Department of Orthopaedic Surgery Amphia HospitalBreda 4818CKNorth-BrabantNetherlands D Lab Amphia HospitalBreda 4818CKNorth-BrabantNetherlands

Three-dimensional(3D)printing is a rapidly evolving and promising field to improve outcomes of orthopaedic *** use of patient-specific 3D-printed models is specifically interesting in paediatric orthopaedic surgery,as limb deformity corrections often require an individual 3D *** this editorial,various operative applications of 3D printing in paediatric orthopaedic surgery are *** technical aspects and the imaging acquisition with computed tomography and magnetic resonance imaging are ***,there is a focus on the intraoperative applications of 3D printing during paediatric orthopaedic surgical *** overview of various upper and lower limb deformities in paediatrics is given,in which 3D printing is already implemented,including posttraumatic forearm corrections and proximal femoral *** use of patient-specific instrumentation(PSI)or guiding templates during the surgical procedure shows to be promising in reducing operation time,intraoperative haemorrhage and radiation ***,3D-printed models for the use of PSI or patient-specific navigation templates are promising in improving the accuracy of complex limb deformity surgery in ***,the future of 3D printing in paediatric orthopaedics extends beyond the intraoperative applications;various other medical applications include 3D casting and prosthetic limb *** conclusion,3D printing opportunities are numerous,and the fast developments are exciting,but more evidence is required to prove its superiority over conventional paediatric orthopaedic surgery.

关键词： Three-dimensional printing Paediatric Orthopaedic surgery Intraoperative Patient-specific instrumentation Guiding

Electrochemically assisted production of biogenic palladium nanoparticles for the catalytic removal of micropollutants in wastewater treatment plants effluent

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Journal of Environmental Sciences 2023年第6期128卷 203-212页

作者： Cindy Ka Y Law Kankana Kundu Luiza Bonin Lorena Peñcoba-Antona Eduardo Bolea-Fernandez Frank Vanhaecke Korneel Rabaey Abraham Esteve-Nez bart De Gusseme Nico Boon Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 653B-9000 GentBelgium Centre for Advanced Process Technology for Urban Resource recovery(CAPTURE) P.O.Frieda Saeysstraat 1B-9000 GentBelgium METfilter S.L. Autovía A49 Sevilla-Huelva Km 2841820 Carrión de los CéspedesSevillaSpain IMDEA Water Institute Av.Punto Com2Parque Científico Tecnológico28805 Alcaláde HenaresMadridSpain Atomic&Mass Spectrometry(A&MS)research group Department of ChemistryGhent UniversityCampus SterreKrijgslaan 281-S12B-9000 GhentBelgium Universidad de Alcalá Department of Analytical ChemistryPhysical Chemistry and Chemical EngineeringCtra.Madrid-Barcelona Km 33.60028871 Alcaláde HenaresMadridSpain

Biogenic palladium nanoparticles(bio-Pd NPs)are used for the reductive transformation and/or dehalogenation of persistent *** this work,H2(electron donor)was produced in situ by an electrochemical cell,permitting steered production of differently sized bio-Pd *** catalytic activity was first assessed by the degradation of methyl *** NPs showing the highest catalytic activity were selected for the removal of micropollutants from secondary treated municipal *** synthesis at different H2 flow rates(0.310 L/hr or 0.646 L/hr)influenced the bio-Pd NPs *** NPs produced over 6 hr at a lowH2 flow rate had a larger size(D50=39.0 nm)than those produced in 3 hr at a high H2 flow rate(D50=23.2 nm).Removal of 92.1%and 44.3%of methyl orange was obtained after 30 min for the NPs with sizes of 39.0 nm and 23.2 nm,***-Pd NPs of 39.0 nm were used to treat micropollutants present in secondary treated municipal wastewater at concentrations ranging fromμg/L to ng/*** removal of 8 compounds was observed:ibuprofen(69.5%)94.3%)90%***,these data indicate that the size,and thus the catalytic activity of the NPs can be steered and that the removal of challengingmicropollutants at environmentally relevant concentrations can be achieved through the use of bio-Pd NPs.

关键词： Antibiotics Adsorption Biogenic palladium nanoparticles Catalytic activity H2 Secondary treated municipal wastewater

From Single Droplet to Column Design

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Tsinghua Science and Technology 2006年第2期11卷 212-216页

作者： Hans-Jrg bart Institute of Thermal Process Engineering TU Kaiserslautern D-67653 Kaiserslautern Germany

The technique state to design counter-current extraction columns is based on the performance of pilot plant experiments. The modelling is then either with the equilibrium or dispersion model, whereas in the latter the dispersion coefficient accounts for all hydrodynamic non-idealities. A new approach uses single droplet experiments to obtain the basic laws and functions governing droplet breakage, coalescence, relative velocity, and axial dispersion when using droplet populance balance models （DPBM）. The hydrodynamics simulation results show that the mean Sauter diameter, hold-up, and concentration profiles could be well predicted, which promotes the use of DPBM models for further applications in industrial scale.

关键词： single droplet column design countercurrent extraction droplet populance balance model

High speed phase modulators for silicon photonic integrated circuits:a role for lithium niobate?

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Advanced Photonics 2019年第3期1卷 3-5页

作者： Roel Baets bart Kuyken Ghent University–imec Photonics Research GroupGentBelgium Ghent University Center for Nano-and BiophotonicsGentBelgium

Lithium niobate(LN)has been and still is a prominent material for high speed optical *** performance of such LN-modulators—as a stand-alone building block for optical systems—has been unchallenged for many *** in many ways it has proven to be very hard to integrate lithium niobate modulators with other functions on a single optical *** a result,scientific interest in this material has been fading away.

关键词： lithium integrate alone