Miracle-dz/UniFAR-FTUs huggingface dataset:
Effect of light on biosynthesis of alkamide, caffeic acid derivatives and echinacoside in Echinacea purpurea L. callus cultures

Light is not only effective in photosynthesis, growth and development, but also play an important role in biosynthesis of primary and secondary metabolites. The present research was aimed to determine effect of light on biosynthesis of alkamide, caffeic acid derivatives and echinacoside in cell suspension cultures of Echinacea purpurea L. Stem explants derived from sterile plants were subjected to callus culture in a B5 media supplemented with 1.0 mg/L BAP and 2.0 mg/L NAA. Afterward, 8-day cell cultures were incubated in light and dark environments and cell harvesting, with a three-day interval, was carried out five times. The contents of alkamide, caffeic acid derivatives and echinacoside were determined using HPLC. Alkamide, caftaric acid and echinacoside content increased regularly with light application. Light application increased alkamide content by 57%, as an average, compared to darkness. The cell cultures exposed to 12 days of incubation in light produced the highest alkamide content, with a 2.11-fold increase, compared to dark. Subjecting the cell cultures to light for 12 days resulted in 70% and 63% increases in caftaric acid and echinacoside. This study showed that light application in Echinacea purpurea L. cell suspension culture had a great potential for increasing some important phytochemicals.
Neutron diffraction study of magnetic ordering in UPd2Si2, UPd2Ge2, URh2Si2 and URh2Ge2

Neutron diffraction measurements on polycrystalline samples show that UPd2Si2, UPd2Ge2 and URh2Si2 become antiferromagnetic below temperatures of 150K, 140K and 137K respectively. The magnetic moment ordering in UPd2Si2 and UPd2Ge2 is represented by a static longitudinal wave propagating along the c axis of the tetragonal body-centred crystal lattice. The magnetisation wave is polarised in the direction of the c axis: q=(0, 0, 0.662+or-0.010)c* in UPd2Si2 and q=(0, 0, 0.748+or-0.010)c* in UPd2Ge2. At 40K, UPd2Si2 exhibits a magnetic phase transition: a commensurate magnetisation wave with q=(0, 0, 1)c* represents the growth of a simple antiferromagnetic ordering. URh2Si2 is a collinear antiferromagnet with coinciding magnetic and chemical unit cells. The sequence of ferromagnetic sheets piled up along the tetragonal axis is given by +-. The values of the root mean square of the magnetic moment on the U ion at 4.2K are found to be 1.96 mu B, 1.97 mu B and 1.96 mu B for UPd2Si2, UPd2Ge2 and URh2Si2 respectively. The observed magnetic ordering schemes are discussed in terms of the RKKY exchange interaction. Neutron diffraction measurements performed at zero magnetic field show that URh2Ge2 is paramagnetic at 4.2K.
STUDY OF HYDROGEN AUTOIGNITION IN A TURBULENT AIR CO-FLOW USING THE EULERIAN STOCHASTIC FIELDS METHOD WITH LARGE EDDY SIMULATIONS

ABSTRACT Large Eddy Simulation is applied to the auto-ignition of a hydrogen jet issuing into a turbulent co-flowing air stream. A nineteen step, nine species detailed mechanism is used for reaction. The influence of sub-grid species concentration and temperature fluctuations is accounted for by a sub-grid joint PDF for the reactive scalars, obtained from solution of a modelled transport equation. The method is able to reproduce ignition lengths and different regimes observed experimentally without any adjustment or calibration of the model constants. INTRODUCTION Current understanding of auto-ignition in turbulent flows is limited by the ability of present numerical models to simulate auto-ignition at realistic Reynolds numbers. Homogeneous ignition is characterised by an induction time, which corresponds to an increase in the pool of radicals without thermal feedback, followed by a thermal path where temperature and concentrations increase exponentially inside “spots” or “kernels” which act as a bridge to ignition. The location of these kernels is affected by the spatial concentration distribution. Turbulence enhances the mixing of reactants, and therefore the formation of radicals and ignition. However, large turbulent fluctuations may quench the kernels before they grow to a critical size. Any method for accurately predicting auto-ignition phenomena must incorporate unsteady chemistry, detailed mechanisms (intermediates and slow reactions are important) and of course turbulence. The most common approach to reacting flows is to apply Reynolds Averaging to the Navier-Stokes equations (RANS) and use a turbulence model. However Large Eddy Simulations (LES), though more expensive, represent an alternative approach to RANS based methods and offer an improved representation of unsteady motions; LES removes part of the
Stabilisation de flammes de diffusion turbulentes assistée par plasma hors-équilibre et par champ électrique

L’objectif de cette these est d’etudier le potentiel d’un plasma hors-equilibre a stabiliser des flammes-jets et a swirl. Les decharges impulsionnelles haute-tension a barriere dielectrique (55kV-200Hz-0. 6W) permettent de stabiliser efficacement des flammes-jets. Mais la production de radicaux par la decharge est insuffisante pour influencer la combustion. La stabilisation est due au champ electrique entrainant la derive des ions de la flamme. La stabilisation des flammes est donc aussi grandement amelioree en appliquant une tension continue. Cette nouvelle configuration a aussi permis d’ameliorer la stabilite de flammes de coflow et a swirl. Des mesures couplees PIV et LIF (OH et acetone) ont montre que sous la flamme, les champs de vitesse et de fraction de melange ne sont pas modifies, mais qu’avec un champ electrique, la flamme arrive a supporter des gradients de fraction de melange plus eleves. Quand l’intensite du swirl augmente, l’effet du champ devient negligeable.
PAR protein activation-deactivation cycles stabilize long-axis polarization in C. elegans

Cell polarity endows cells with a reference frame that guides cellular organization and division. In the Caenorhabditis elegans zygote, PAR protein patterns determine the anterior-posterior axis and facilitate the redistribution of proteins for the first asymmetric cell division. While previous theoretical work has shown that mutual antagonism between (anterior) aPAR and (posterior) pPAR proteins is the key to polarity maintenance, what factors determine the selection of the polarity axis remains unclear. Here we formulate a reaction-diffusion model in a realistic cell geometry, based on bimolecular reactions and fully accounting for the coupling between membrane and cytosolic dynamics. We find that the kinetics of the phosphorylation-dephosphorylation cycle of PAR proteins is crucial for the selection of the long (anterior-posterior) axis for polarization. Biochemical cycles based on mutual exclusion alone, without a delay in dephosphorylation, would lead to short (dorsal-ventral) axis polarization. Our analysis shows that the local ratio of membrane surface to cytosolic bulk volume is the main geometric cue to which patterns adapt, and the decisive parameter that determines axis selection is given by the ratio of the diffusive length of the phosphorylated (inactive) phase to the cell length. We quantify the effect of relative protein numbers and find that they primarily affect the robustness of protein pattern formation. In particular, robustness to variations in the phosphorylation rates increases if scaffold proteins like PAR-3 are more abundant than PKC-3, which phosphorylates pPARs. Together, our theoretical study reveals the crucial role of geometry in self-organized protein pattern formation: axis selection is based on the generic dependence of intracellular pattern-forming processes on the local ratio of membrane surface to cytosolic volume.
SOLAR PV POWERED WATER PUMPING SYSTEM USING DC MOTOR DRIVE: A CRITICAL REVIEW

This paper presents the review of the Solar Photovoltaic (SPV) array fed water pumping system using a DC Motor Drive. The penetration of renewable energy powered water pumping systems in industrial and domestic applications receiving wide attention nowadays. The introduction of a DC motor brings an improved solution to the commercial water pumping system. SPV array fed water pumping system using DC mainly consist the maximum power from the solar Photovoltaic (PV) array by restraining the duty ratio of the DC-DC boost converter. The results will be presented in terms of performance parameters such as total energy produced and total volume of water pumped and further validate that MPPT can significantly improve efficiency and performance of PV water pumping system compared to the system with and without MPPT.
Investigation of crown ether cation systems using electrophoretic NMR

The purpose of this thesis was to investigate how crown ethers behave and interact with different cations and to optimise the setup of the electrophoretic NMR. To get a good electrophoretic NMR measurement the electrophoretic phase shift needs to be big. To increase the phase shift some parameters needed to be adjusted, parameters such as the concentration of crown ether and cation, the duration of magnetic field gradient pulse δ, the magnetic field gradient strength g, the diffusion time Δ and the applied voltage V.The main focus then put on crown ethers 15-crown-5 and 18-crown-6. The cations used were lithium (Li), sodium (Na), potassium (K), caesium (Cs), calcium (Ca) and barium (Ba). The effective charge was obtained by using pulsed gradient NMR to derive the diffusion coefficient and electrophoretic NMR to get the electrophoretic mobility. These data were used to calculate the equilibrium constant of the formed complex.The outcome of the investigation: the affinity for 18-crown-6 was in the following orderbarium > potassium > caesium > sodium > calcium > lithiumand for 15-crown-5barium > sodium > calcium > caesium > potassium > lithium.
ARCS Model Applied in High School Business Gaming: Implementation and Analysis

This paper discusses the importance of providing early internship experiences to undergraduate business students to enable more effective practical skill growth prior to graduation. The authors describe the Emerging Ethical Leaders program at the University of Pittsburgh’s David Berg Center for Ethics and Leadership, which provides sophomore and junior business students an early exposure internship opportunity. This early exposure internship pairs business students with local businesses and organizations that have established partnerships with the University of Pittsburgh and David Berg Center for Ethics and Leadership. The internship opportunities often involve non-profits and small businesses, allowing business students the opportunity to apply their business acumen to organizations that may not have the staff or the time to complete certain business-focused projects. By working with non-profit organizations and small businesses, students gain exposure to organizations with a socially responsible mission and gain important ethical leadership skills. The goal of internship program is to provide students a way to engage with diverse sectors and become more prepared for competitive internships in the summer following their junior year. When applying for jobs, students are able to report on two effective and diverse internship experiences, enabling them to be a stronger job candidate. This paper describes the Emerging Ethical Leadership model and provides a case-study example of effective early internship experiences. The authors also build an assessment model that captures the impact of the early internship experience from the employer’s perspective. This assessment model is based off of findings from an analysis of internship experiences indicating a need to integrate employer feedback into the design of internship programs at the University of Pittsburgh.
Cyber Security and Privacy in Internet of Things

With the evolution of the internet and innovative technologies, the world has now become a small village, where many sophisticated applications are taking place to make our lives more enjoyable and comfortable. With the huge benefits which we get from internet-based technologies, there also are significant concerns for user data privacy and security. As the domain of internet-based applications widens, so does the scope of cyber privacy and attacks. In particular, security and privacy are critical issues in the Internet of Things (IoT). Critical areas IoT, where security needs to be strengthened, are Location-Based Services (LBS) and Smart City, where a huge number of applications are processed. As IoT combines millions of tools and gadgets to deal with a huge number of applications, the security and privacy concerns need to be addressed proportionally. Many researchers have contributed to ideas, methods, approaches, techniques, and systems to combat the menace of security and privacy breaches. However, none of these mechanisms is perfect; rather each of them has one or more anomalies or weaknesses. The aim of this paper is to propose a new approach known as the Bartering Approach, which increases the level of privacy and decreases the cost and performance compared to the previous approaches. This article also provides an overview of the available methods and approaches currently available for ensuring security and privacy.
Polymérisation par plasma froid : un outil pour l'obtention de surfaces fonctionnalisées pour les applications de type biocapteur et pour les systèmes à libération de médicaments

La reponse biologique d’un materiau est essentiellement reliee a sa surface : cela souligne l’importance du role des techniques de modification de surface dans la realisation d’une reponse biologique adaptee. Ainsi les surfaces fonctionnalisees par des ‘hydrogels’ minces possedent un enorme potentiel dans diverses applications. En effet, les hydrogels sensibles au pH et a la temperature peuvent etre utilises dans le but de liberer de facon controlee une molecule dans l’environnement biologique. Ces hydrogels peuvent aussi etre utilises en tant que biocapteur de par leurs fonctions disponibles permettant la reconnaissance specifique de biomolecules cibles. Differents procedes, choisis principalement en fonction du type de materiau et de la surface a fonctionnaliser, peuvent etre utilises pour l’obtention de ce genre de films. Parmi ces procedes, le choix s’est tourne vers l’utilisation de la polymerisation par plasma dont les proprietes de surfaces peuvent etre ajustees en fonction des parametres de la decharge tel que la puissance electrique, le temps de traitement, la composition et la pression du gaz.
Studies on the interspecific relationship among dominant species of the semi-arid valley scrubs in maoxian on the upper reaches of the Minjiang river

Using the methods of 2×2 contingency table, variance analyses, X~(2)-test, Ochiai indexes and the Pearson product-moment correlation coefficients, the authors of this paper studied the interspecific association and covariation of 10 dominant species of the semi-arid valley scrubs in Maoxian on the upper reaches of the Minjiang River. The results indicated that the interspecific relationship of the scrubs was complicated; positive complex correlation among the dominant species was obvious in the scrubs; seven pairs of species obviously showed their positive correlation in the 45 pairs of species; their Ochiai indexes were 0.645-0.858, which indicated that all the species pairs had the same demands on habitats and 5 pairs obviously showed their positive covariation. Those above proved that there was no internal relation between interspecific association and covariation in a given vegetation. The association between Ceratostigma minus and other dominant species was the most extensive. Convolvulus tragacanthoides was a relative independent component, and it was not obviously associated and correlated with other dominant species in the semi-arid valley scrubs.
Spectroscopie d'impédance électrique par biocapteur à micro-électrodes : application à la cytométrie de flux de cellules sanguines

Ce travail de these porte sur la realisation et la validation d'un capteur pour la mesure d'impedance en cytometrie de flux associee a un dispositif microfluidique pour des cellules sanguines dans la gamme de frequences (100 kHz-10 MHz). Un premier chapitre introduit les proprietes electriques et dielectriques des tissus vivants. Les effets de chaque element des cellules sur l'impedance globale mesuree sont decrits, ainsi que les modeles associes. Un etat de l'art, sur les mesures de l'echelle macroscopique a la mesure unitaire de cellules, est expose dans le second chapitre. Les mesures en cytometrie de flux et l'utilisation possible des actionneurs a ondes acoustiques de surface (SAW) y sont aussi etudiees. Le troisieme chapitre concerne la modelisation analytique et la simulation par la methode des elements finis de cellules unitaires par des microelectrodes de differentes geometries. Les resultats de cette section ont permis de determiner les meilleures geometries, leurs sensibilites, et leurs reponses. La fabrication du capteur est etudiee dans le quatrieme chapitre. Les contraintes liees a la faisabilite par les techniques de micro-fabrication et la biocompatibilite des materiaux y sont developpees. Des premiers tests de validation sur les ecoulements y sont effectues. Le cinquieme et dernier chapitre est centre sur la mesure de cellules et particules. Des tests de calibration ont ete realises pour determiner le facteur de forme des electrodes et les impedances parasites. Les mesures suivantes sur des cellules et particules ont permis de valider les resultats obtenus en simulation, ainsi que la discrimination des particules testees en fonction de leurs dimensions
FACTORS AFFECTING USER SATISFACTION ON THE QUALITY OF IDENTITY CARD SERVICE IN SOC TRANG PROVINCE

This study aimed to identify the factors that influence user satisfaction on the quality of ID card service in Soc Trang Province. Cronbach’s Alpha, exploratory factor analysis and multivariate linear regression were utilized to analyze the data collected from direct interviews with 224 people Công an tỉnh Sóc Trăng Ngày nhận bài: 11/2/2020; Ngày nhận kết quả bình duyệt: 24/3/2020; Ngày chấp nhận đăng: 8/5/2020 Email: thuan.levan. ct@gmail.com Soc Trang Department of Public Security Received date: 11 February 2020; Revised date: 24 March 2020; Accepted date: 8 May 2020 using the ID card service by police in Soc Trang Province, Viet Nam. The results of the study identified five factors that contributed to satisfaction, including adequate equipment; receiving recommendations and results; clear guidance; good communication with the officers; forms and procedures.
Effects of sticky trap colour, UV illumination and within-trap variation on tomato potato psyllid captures in glasshouses

ABSTRACT The tomato potato psyllid (TPP) is a serious pest of New Zealand glasshouse crops. This study examined the use of sticky traps in a glasshouse tomato crop to identify factors that influence TPP catches, with a view to developing a more consistent TPP monitoring system for use in IPM decision models. TPP catches were highest on yellow traps compared with black traps and white traps, and were greatest when traps were set near the glasshouse roof (2.1 m). Ultraviolet (UV) illumination substantially increased TPP catches on traps of all colours. There was considerable variation in TPP catch density within traps, especially near the edges. The results suggest that yellow sticky traps have good potential as TPP monitoring tools in glasshouse tomato crops. Consistency in TPP counts could be enhanced if traps were placed at constant height, were illuminated by UV, and assessments were limited to the trap centres.
Dowsing for salinity tolerance related genes in chickpea through genome wide association and in silico PCR analysis

Soil salinity is a major abiotic stress severely limits agricultural crop production throughout the world, and the stress is increasing particularly in the irrigated agricultural areas. Chickpea (Cicer arietinum L.) is an important grain legume that plays a significant role in the nutrition of the developing world. In this study, we used a chickpea subset collected from the genebank of the International Center for Agricultural Research in the Dry Area (ICARDA). This collection was selected by using the focused identification of germplasm strategy (FIGS). The subset included 138 genotypes which have been screened in the open field (Arish, Sinai, Egypt) and in the greenhouse (Giza, Egypt) by using the hydroponic system at 100 mM NaCl concentration. The experiment was laid out in randomized alpha lattice design in two replications. The molecular characterization was done by using sixteen SSR markers (collected from QTL conferred salinity tolerance in chickpea), 2,500 SNP and 3,031 DArT markers which have been developed and used for association study. The results indicated significant differences between the chickpea genotypes. Based on the average of the two hydroponic and field experiments, seven tolerant genotypes IGs (70782, 70430, 70764, 117703, 6057, 8447 and 70249) have been identified. The data analysis indicated one SSR (TAA170), three DArT (DART2393, DART769 and DART2009) and eleven SNP markers (SNP2021, SNP1268, SNP1451, SNP1487, SNP1667, SNP2095, SNP190, SNP2247 SNP1947, SNP2331 and SNP948) were associated with salinity tolerance. The flanking regions of these markers revealed genes with a known role in the salinity tolerance, which could be candidates for marker-assisted selection in chickpea breeding programs.
Development of betulinic acid triazole conjugates as potential anti-cancer agents

v List of Figures . viii List of Tables . xii Chapter 1: Introduction . 1 Betulin/Betulinic Acid . 1 Multicomponent Reactions . 3 Functionalization of Betulin . 4 Synthesis of Betulin Conjugates via Click Reaction . 5 Baylis-Hillman Reaction . 8 Chapter 2: Preparation of Betulin-Triazole Conjugates . 10 Synthesis of Azides via Baylis-Hillman Reaction . 10 Synthesis of Pyrazinyl Triazoles . 14 Synthesis of Indolyl Triazoles . 17 Synthesis of N-Propargylcinnamamides . 19 Synthesis of Betulonamide-Triazole Conjugates . 20 Biological Evaluation.23 Conclusions . 26 Chapter 3: Experimental Procedures . 27 Materials and Methods . 27 Instrumentation . 27
Soret and Dufour effect on double diffusive natural convection in a wavy porous enclosure

Natural Convection in a Wavy Porous Enclosure B. V. R. Kumar 3 , 2 , 1 , S.Belouettar 2 , S. K. Murthy , Vivek Sangwan , Mohit Nigam 1 , Shalini 4 , D.A. S.Rees 5 and P.Chandra Indian Institute of Technology Kanpur, UP-208016, India CRP Henri Tudor, LTI, 29 Ave. J.F. K, L-1855, Luxembourg 2 ITWM, Fraunhofer Institute I, Kaisersluatern, Germany 3 INRIA, Rocquencourt, BP 105, 78153, Le Chesnay, France 4 University of Bath, Bath, BA2 7AY, UK 5