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Use of antibiotics in broiler production:Global impacts and alternatives

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Animal Nutrition 2018年第2期4卷 170-178页

作者： Youcef Mehdi Marie-Pierre Létourneau-Montminy Marie-Lou Gaucher Younes Chorfi Gayatri Suresh Tarek Rouissi Satinder Kaur Brar Caroline Cté Antonio Avalos Ramirez Stéphane Godbout Université Laval Faculté des sciences de l'agriculture et de l'alimentation institut de recherche et de Développement en Agroenvironnement Université de Montréal Faculté de Médecine Vétérinaire institut National de recherche Scientifique Centre National en électrochimie et en Technologies environnementales

Antibiotics are used to fight bacterial ***, a selective pressure gave rise to bacteria resistant to *** leaves scientists worried about the danger to human and animal *** strategies can be borrowed to reduce the use of antibiotics in chicken *** research has been carried out to look for natural agents with similar beneficial effects of growth *** aim of these alternatives is to maintain a low mortality rate, a good level of animal yield while preserving environment and consumer *** these, the most popular are probiotics, prebiotics, enzymes,organic acids, immunostimulants, bacteriocins, bacteriophages, phytogenic feed additives, phytoncides,nanoparticles and essential oils.

关键词： Broiler chicken Antibiotic Probiotic Prebiotic enzyme Essential oil

Extracellular vesicles in nanomedicine and regenerative medicine:A review over the last decade

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Bioactive Materials 2024年第6期36卷 126-156页

作者： Saeid Moghassemi Arezoo Dadashzadeh Maria Joãao Sousa Hanne Vlieghe Jie Yang Cecibel María León-Félix Christiani A.Amorim Pôle de recherche en Physiopathologie de La Reproduction Institut de Recherche Expérimentale et CliniqueUniversitéCatholique de LouvainBrusselsBelgium

Small extracellular vesicles(sEVs)are known to be secreted by a vast majority of *** sEVs,specifically exosomes,induce specific cell-to-cell interactions and can activate signaling pathways in recipient cells through fusion or *** nanovesicles possess several desirable properties,making them ideal for regenerative medicine and nanomedicine *** properties include exceptional stability,biocompatibility,wide biodistribution,and minimal ***,the practical utilization of sEVs,particularly in clinical settings and at a large scale,is hindered by the expensive procedures required for their isolation,limited circulation lifetime,and suboptimal targeting *** these challenges,sEVs have demonstrated a remarkable ability to accommodate various cargoes and have found extensive applications in the biomedical *** overcome the limitations of sEVs and broaden their potential applications,researchers should strive to deepen their understanding of current isolation,loading,and characterization ***,acquiring fundamental knowledge about sEVs origins and employing state-of-the-art methodologies in nanomedicine and regenerative medicine can expand the sEVs research *** review provides a comprehensive overview of state-of-the-art exosome-based strategies in diverse nanomedicine domains,encompassing cancer therapy,immunotherapy,and biomarker ***,we emphasize the immense potential of exosomes in regenerative medicine.

关键词： Extracellular vesicles Exosomes Regenerative medicine Nanomedicine Drug delivery

Numerical Modelling Point-to-Plane of Negative Corona Discharge in N_2 Under Non-Uniform Electric Field

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Plasma Science and Technology 2015年第6期17卷 469-474页

作者： A.K.FEROUANI M.LEMERINI L.MERAD M.HOUALEF Ecole Préparatoire en Sciences et Techniques Département de Physique LPT Université A.BelkaidFaculté des SciencesDépartement de Physique Ecole Préparatoire en Sciences et Techniques Département de Maths

The paper presents a simulation model of the negative corona discharge in N2 under various pressures. The simulated discharge is of a negative point-to-plane mass type, with an inter-electrode separation distance of 20 mm and a symmetry about the axis of discharge. This simulation investigates the behavior of the neutral density and temperature for different pressures in the range of 0.1-10.0 bar. The spatial and temporal evolution of the neutral gas is analyzed based upon the equations of continuity, momentum and energy in a two-dimensional cylindrical geometry model. For that geometry of the system, the FCT （Flux Corrected Transport） technique was adopted. The results show that the pressure plays a significant role of the neutrals dynamics.

关键词： DC corona discharge FCT method numerical simulation

A Linear Quadratic Controller design Incorporating a Parametric Sensitivity Constraint

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International Journal of Automation and computing 2019年第4期16卷 553-562页

作者： Mohamed Yagoubi LUNAM University Ecole des Mines de Nantes IRCCyN UMR CNRS 6597(Institut de Recherche en Communications et Cyberntique de Nantes)

The purpose of this paper is to propose a synthesis method of parametric sensitivity constrained linear quadratic (SCLQ) controller for an uncertain linear time invariant (LTI) system. System sensitivity to parameter variation is handled through an additional quadratic trajectory parametric sensitivity term in the standard LQ criterion to be minimized. The main purpose here is to find a suboptimal linear quadratic control taking explicitly into account the parametric uncertainties. The paper main contribution is threefold: 1) A descriptor system approach is used to show that the underlying singular linear-quadratic optimal control problem leads to a non-standard Riccati equation. 2) A solution to the proposed control problem is then given based on a connection to the so-called Lur'e matrix equations. 3) A synthesis method of multiple parametric SCLQ controllers is proposed to cover the whole parametric uncertainty while degrading as less as possible the intrinsic robustness properties of each local linear quadratic controller. Some examples are presented in order to illustrate the effectiveness of the approach.

关键词： Linear quadratic control parametric uncertainties trajectory sensitivity non-standard Riccati equation Lur'e matrix equations linear time invariant (LMI) particle swarm optimization

Variations on a Proof of a Borderline Bourgain-Brezis Sobolev Embedding Theorem

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Chinese Annals of Mathematics,Series B 2017年第1期38卷 235-252页

作者： Sagun CHANILLO Jean VAN SCHAFTINGen Po-Lam YUNG department of Mathematics Rutgers the State University of New Jersey 110 Frelinghuysen Road PiscatawayNJ08854USA institut de recherche en mathematique et en physique Universite catholique de Louvain Chemin du Cyclotron 2 bte L7.01.011348 Louvain-la-NeuveBelgium department of Mathematics the Chinese University of Hong KongShatin.Hong Kong

This paper offers a variant of a proof of a borderline Bourgain-Brezis Sobolev embedding theorem on R^n. The authors use this idea to extend the result to real hyperbolic spaces H^n.

关键词： Bourgain-Brezis inequalities Divergence-free vector fields Sobolev inequalities Real hyperbolic space

Motor Imagery and Error Related Potential Induced Position Control of a Robotic Arm

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IEEE/CAA Journal of Automatica Sinica 2017年第4期4卷 639-650页

作者： Saugat Bhattacharyya Amit Konar D.N.Tibarewala BCI-LIFT Project Team Institut National de Recherche en Informatique et en Automatique (INRIA) IEEE Artificial Intelligence Laboratory ETCE DepartmentJadavpur University Centre for Healthcare Science and Technology Indian Institute of Engineering Science and Technology

The paper introduces an electroencephalography(EEG) driven online position control scheme for a robot arm by utilizing motor imagery to activate and error related potential(ErrP) to stop the movement of the individual links, following a fixed(pre-defined) order of link selection. The right(left)hand motor imagery is used to turn a link clockwise(counterclockwise) and foot imagery is used to move a link forward. The occurrence of ErrP here indicates that the link under motion crosses the visually fixed target position, which usually is a plane/line/point depending on the desired transition of the link across 3D planes/around 2D lines/along 2D lines respectively. The imagined task about individual link's movement is decoded by a classifier into three possible class labels: clockwise, counterclockwise and no movement in case of rotational movements and forward, backward and no movement in case of translational movements. One additional classifier is required to detect the occurrence of the ErrP signal, elicited due to visually inspired positional link error with reference to a geometrically selected target position. Wavelet coefficients and adaptive autoregressive parameters are extracted as features for motor imagery and ErrP signals respectively. Support vector machine classifiers are used to decode motor imagination and ErrP with high classification accuracy above 80%. The average time taken by the proposed scheme to decode and execute control intentions for the complete movement of three links of a robot is approximately33 seconds. The steady-state error and peak overshoot of the proposed controller are experimentally obtained as 1.1% and4.6% respectively.

关键词： Brain-computer interfacing(BCI) error related potential(Errp) motor imagery decoding position control of a robot arm

Positron energy Levels in Cd-Based Semiconductors

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Communications in Theoretical Physics 2013年第6期59卷 756-762页

作者： B.Abbar S.Mécabih S.Amari N.Benosman B.Bouhafs Laboratoire de Modélisation et de Simulation en Sciences des Département de physique Université Djillali Liabès

Using the full potential linearized augmented plane wave FP-LAPW method within local density ap-proximation LDA, we have studied positron diffusion and surface emission in Cd-based semiconductors. This requires the calculation of electron and positron band structures. In the absence of experimental and theoretical data for CdX (X=S,Se,Te) we have treated the Si, which has been studied by several authors, as a test case. Predictive results on positron effective masses, deformation potentials, positron work functions, diffusion constants and positron mobilities are presented for CdX (X=S, Se, Te). Our calculated data for Si are compared with experimental and recent theoretical results.

关键词： DFT FP-LAPW semiconductors positron diffusion

Preservation of Juniperus thurifera L.:a rare endangered species in Algeria through in vitro regeneration

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Journal of Forestry Research 2019年第1期30卷 77-86页

作者： Nadia Khater Halima Benbouza Faculté SNV Université Batna 2 institut des Sciences Vétérinaires et Sciences Agronomiques Université Batna 1 Centre de recherche en Biotechnologies

Juniperus thurifera *** an endemic Cupres saceae from the Aure`s Mountains of north eastern Algeria and endangered,in part,due to the scarcity of viable seeds It is threatened by other abiotic factors and the lack of an effective management strategy will increase its risk o *** dearth of information on its in vitro regeneration impedes its application in forest managemen *** therefore developed a micropropagation protocol using microcuttings with auxiliary *** were grown on different combinations of media supplemented with plant growth regulators at different *** highest number of shoots and branches regenerated from original shoots was obtained on Woody Plant Medium(WPM)supplemented with 6-benzylaminopurine(BAP)(0.5 mg L^(-1))and 2,4-dichlorophe noxyacetic acid(2,4-D)(0.25 mg L^(-1)).The best elongation of shoots was achieved with WPM supplemented with0.5 mg L^(-1)of BAP and 0.25 or 1 mg L^(-1) of 2,*** the second subculture,shoots had a higher number of branches than those of the *** highest rooting rate,38.8%,was obtained with shoots cultured in 1/2 Murashige and Skoog(MS)medium supplemented with 5.0 mg L^(-1)each of indol-3-butyric(IBA)and naphthalene acetic acid(NAA).Similarly,the highest root numbers and lengths were produced on 1/2 MS medium supplemented with IBA and NAA(5.0 mg L^(-1)each).During transfer to acclimatization,rates of plant losses of 50% *** second part of the experiment showed that the best shoot callusing was on WPM supplemented with BAP and 2,4-D,with either the combination 0.5+0.25 or 0.25+0.25 mg L^(-1).The results of this research provide a starting point for further studies on in vitro regeneration of *** for the sustainable management of its unique ecosystem in the Mediterranean basin.

关键词： Juniperus thurifera Callus Conservation Regeneration In vitro culture

Exact Solution of D-Dimensional Klein-Gordon Oscillator with Minimal Length

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Communications in Theoretical Physics 2010年第2期53卷 231-236页

作者： Y.Chargui L.Chetouani A.Trabelsi Unit de recherche de physique Nuclaire et des Hautes energies Facult des Sciences de Tunis Dpartement de physique Thorique Institut de Physique Universit de Constantine Route Ain El Bey Unite de recherche de physique Nucleaire et des Hautes energies Faculte des Sciences de Tunis Centre National des Sciences et Technologies Nuclaires

Specific modifications of the usual canonical commutation relations between position and momentumoperators have been proposed in the literature in order to implement the idea of the existence of a minimal observablelength. Here, we study a consequence of this proposal in relativistic quantum mechanics by solving in the momentumspace representation the Klein-Gordon oscillator in arbitrary dimensions. The exact bound states spectrum and thecorresponding momentum space wave function are obtained. Following Chang et al. (Phys. Rev. D 65 (2002) 125027),we discuss constraint that can be placed on the minimal length by measuring the energy levels of an electron in a penningtrap.

关键词： Klein-Gordon oscillator minimal length energy spectrum