High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders

Processing of the YMn2O5 powder is very challenging, since it decomposes to YMnO3 and Mn3O4 at temperatures close to 1180 °C, while samples consolidation commonly demands high temperatures. The main goal of this work is to investigate a possibility to prepare thick films of YMn2O5, since their deposition generally requires significantly lower temperatures. Multiferroic YMn 2O5 was synthesized by the hydrothermal method from Y(CH3COO)3·xH2O, Mn(CH 3COO)2·4H2O and KMnO4 precursors. XRD, FE-SEM and TEM analysis showed that the obtained powder was monophasic, with orthorhombic crystal structure and columnar particle shape with mean diameter and length of around 20 and 50 nm, respectively. The obtained powder was suspended in isopropyl alcohol with addition of appropriate binder and deflocculant. This suspension was used for electrophoretic deposition of YMn2O5 thick films under the high-voltage conditions and electric fields ranging from 250 to 2125 V/cm. The films obtained at 1000 V/cm and higher electric fields showed good adhesion, particle packing, homogeneity and very low porosity. It was shown that the deposition in extremely high electric fields (KC=2125 V/cm) can influence the crystal orientation of the films, resulting in formation of preferentially oriented films. © 2012 Elsevier Ltd and Techna Group S.r.l.

Dispositivo de microdescargas em gases na pressão atmosférica

This work describes the development of an electro-mechanical micro-discharges device operating at ambient condition of pressure and temperature, capable to produce plasma jets for surface finishing. The discharges are produced through a needle shape electrode hollow cathode type by which flows the helium gas. The voltage applied on the electrode is provided for an AC/AC switching voltage converter of full-bridge topology. The converter is energized by a power line of 110/220 VAC, 60 Hz and gives a 1000 V peak-to-peak from 5 kHz to 40 kHz square waveform output. The output frequency is defined by a control signal provided by an external signal generator. The equipment setup includes output acquisition of voltage and current and a photo-detector for photo-electrical measurements, which allows an optical characterization of the plasma jet

Dispositivo de microdescargas em gases na pressão atmosférica

This work describes the development of an electro-mechanical micro-discharges device operating at ambient condition of pressure and temperature, capable to produce plasma jets for surface finishing. The discharges are produced through a needle shape electrode hollow cathode type by which flows the helium gas. The voltage applied on the electrode is provided for an AC/AC switching voltage converter of full-bridge topology. The converter is energized by a power line of 110/220 VAC, 60 Hz and gives a 1000 V peak-to-peak from 5 kHz to 40 kHz square waveform output. The output frequency is defined by a control signal provided by an external signal generator. The equipment setup includes output acquisition of voltage and current and a photo-detector for photo-electrical measurements, which allows an optical characterization of the plasma jet

Vibration as a method for muscular stimulation

Human reactions to vibration have been extensively investigated in the past. Vibration, as well as whole-body vibration (WBV), has been commonly considered as an occupational hazard for its detrimental effects on human condition and comfort. Although long term exposure to vibrations may produce undesirable side-effects, a great part of the literature is dedicated to the positive effects of WBV when used as method for muscular stimulation and as an exercise intervention. Whole body vibration training (WBVT) aims to mechanically activate muscles by eliciting neuromuscular activity (muscle reflexes) via the use of vibrations delivered to the whole body. The most mentioned mechanism to explain the neuromuscular outcomes of vibration is the elicited neuromuscular activation. Local tendon vibrations induce activity of the muscle spindle Ia fibers, mediated by monosynaptic and polysynaptic pathways: a reflex muscle contraction known as the Tonic Vibration Reflex (TVR) arises in response to such vibratory stimulus. In WBVT mechanical vibrations, in a range from 10 to 80 Hz and peak to peak displacements from 1 to 10 mm, are usually transmitted to the patient body by the use of oscillating platforms. Vibrations are then transferred from the platform to a specific muscle group through the subject body. To customize WBV treatments, surface electromyography (SEMG) signals are often used to reveal the best stimulation frequency for each subject. Use of SEMG concise parameters, such as root mean square values of the recordings, is also a common practice; frequently a preliminary session can take place in order to discover the more appropriate stimulation frequency. Soft tissues act as wobbling masses vibrating in a damped manner in response to mechanical excitation; Muscle Tuning hypothesis suggest that neuromuscular system works to damp the soft tissue oscillation that occurs in response to vibrations; muscles alters their activity to dampen the vibrations, preventing any resonance phenomenon. Muscle response to vibration is however a complex phenomenon as it depends on different parameters, like muscle-tension, muscle or segment-stiffness, amplitude and frequency of the mechanical vibration. Additionally, while in the TVR study the applied vibratory stimulus and the muscle conditions are completely characterised (a known vibration source is applied directly to a stretched/shortened muscle or tendon), in WBV study only the stimulus applied to a distal part of the body is known. Moreover, mechanical response changes in relation to the posture. The transmissibility of vibratory stimulus along the body segment strongly depends on the position held by the subject. The aim of this work was the investigation on the effects that the use of vibrations, in particular the effects of whole body vibrations, may have on muscular activity. A new approach to discover the more appropriate stimulus frequency, by the use of accelerometers, was also explored. Different subjects, not affected by any known neurological or musculoskeletal disorders, were voluntarily involved in the study and gave their informed, written consent to participate. The device used to deliver vibration to the subjects was a vibrating platform. Vibrations impressed by the platform were exclusively vertical; platform displacement was sinusoidal with an intensity (peak-to-peak displacement) set to 1.2 mm and with a frequency ranging from 10 to 80 Hz. All the subjects familiarized with the device and the proper positioning. Two different posture were explored in this study: position 1 - hack squat; position 2 - subject standing on toes with heels raised. SEMG signals from the Rectus Femoris (RF), Vastus Lateralis (VL) and Vastus medialis (VM) were recorded. SEMG signals were amplified using a multi-channel, isolated biomedical signal amplifier The gain was set to 1000 V/V and a band pass filter (-3dB frequency 10 - 500 Hz) was applied; no notch filters were used to suppress line interference. Tiny and lightweight (less than 10 g) three-axial MEMS accelerometers (Freescale semiconductors) were used to measure accelerations of onto patient’s skin, at EMG electrodes level. Accelerations signals provided information related to individuals’ RF, Biceps Femoris (BF) and Gastrocnemius Lateralis (GL) muscle belly oscillation; they were pre-processed in order to exclude influence of gravity. As demonstrated by our results, vibrations generate peculiar, not negligible motion artifact on skin electrodes. Artifact amplitude is generally unpredictable; it appeared in all the quadriceps muscles analysed, but in different amounts. Artifact harmonics extend throughout the EMG spectrum, making classic high-pass filters ineffective; however, their contribution was easy to filter out from the raw EMG signal with a series of sharp notch filters centred at the vibration frequency and its superior harmonics (1.5 Hz wide). However, use of these simple filters prevents the revelation of EMG power potential variation in the mentioned filtered bands. Moreover our experience suggests that the possibility of reducing motion artefact, by using particular electrodes and by accurately preparing the subject’s skin, is not easily viable; even though some small improvements were obtained, it was not possible to substantially decrease the artifact. Anyway, getting rid of those artifacts lead to some true EMG signal loss. Nevertheless, our preliminary results suggest that the use of notch filters at vibration frequency and its harmonics is suitable for motion artifacts filtering. In RF SEMG recordings during vibratory stimulation only a little EMG power increment should be contained in the mentioned filtered bands due to synchronous electromyographic activity of the muscle. Moreover, it is better to remove the artifact that, in our experience, was found to be more than 40% of the total signal power. In summary, many variables have to be taken into account: in addition to amplitude, frequency and duration of vibration treatment, other fundamental variables were found to be subject anatomy, individual physiological condition and subject’s positioning on the platform. Studies on WBV treatments that include surface EMG analysis to asses muscular activity during vibratory stimulation should take into account the presence of motion artifacts. Appropriate filtering of artifacts, to reveal the actual effect on muscle contraction elicited by vibration stimulus, is mandatory. However as a result of our preliminary study, a simple multi-band notch filtering may help to reduce randomness of the results. Muscle tuning hypothesis seemed to be confirmed. Our results suggested that the effects of WBV are linked to the actual muscle motion (displacement). The greater was the muscle belly displacement the higher was found the muscle activity. The maximum muscle activity has been found in correspondence with the local mechanical resonance, suggesting a more effective stimulation at the specific system resonance frequency. Holding the hypothesis that muscle activation is proportional to muscle displacement, treatment optimization could be obtained by simply monitoring local acceleration (resonance). However, our study revealed some short term effects of vibratory stimulus; prolonged studies should be assembled in order to consider the long term effectiveness of these results. Since local stimulus depends on the kinematic chain involved, WBV muscle stimulation has to take into account the transmissibility of the stimulus along the body segment in order to ensure that vibratory stimulation effectively reaches the target muscle. Combination of local resonance and muscle response should also be further investigated to prevent hazards to individuals undergoing WBV treatments.

Drifting plasma collection by a positive biased tether wire in LEO-like plasma conditions: current measurement and plasma diagnostic

BETs is a three-year project financed by the Space Program of the European Commission, aimed at developing an efficient deorbit system that could be carried on board any future satellite launched into Low Earth Orbit (LEO). The operational system involves a conductive tape-tether left bare to establish anodic contact with the ambient plasma as a giant Langmuir probe. As a part of this project, we are carrying out both numerical and experimental approaches to estimate the collected current by the positive part of the tether. This paper deals with experimental measurements performed in the IONospheric Atmosphere Simulator (JONAS) plasma chamber of the Onera-Space Environment Department. The JONAS facility is a 9- m3 vacuum chamber equipped with a plasma source providing drifting plasma simulating LEO conditions in terms of density and temperature. A thin metallic cylinder, simulating the tether, is set inside the chamber and polarized up to 1000 V. The Earth's magnetic field is neutralized inside the chamber. In a first time, tether collected current versus tether polarization is measured for different plasma source energies and densities. In complement, several types of Langmuir probes are used at the same location to allow the extraction of both ion densities and electron parameters by computer modeling (classical Langmuir probe characteristics are not accurate enough in the present situation). These two measurements permit estimation of the discrepancies between the theoretical collection laws, orbital motion limited law in particular, and the experimental data in LEO-like conditions without magnetic fields. In a second time, the spatial variations and the time evolutions of the plasma properties around the tether are investigated. Spherical and emissive Langmuir probes are also used for a more extensive characterization of the plasma in space and time dependent analysis. Results show the ion depletion because of the wake effect and the accumulation of- ions upstream of the tether. In some regimes (at large positive potential), oscillations are observed on the tether collected current and on Langmuir probe collected current in specific sites.

Beiträge zur Entwicklungsgeschichte des Judentums, von ca. 400 v. Chr. bis ca. 1000 n. Chr.

von D. Chwolson

The 1000 brightest HIPASS galaxies: Newly cataloged galaxies

The H I Parkes All-Sky Survey (HIPASS) is a blind 21 cm survey for extragalactic neutral hydrogen, covering the whole southern sky. The HIPASS Bright Galaxy Catalog (BGC) is a subset of HIPASS and contains the 1000 H I brightest (peak flux density) galaxies. Here we present the 138 HIPASS BGC galaxies that had no redshift measured prior to the Parkes multibeam H I surveys. Of the 138 galaxies, 87 are newly cataloged. Newly cataloged is defined as having no optical ( or infrared) counterpart in the NASA/IPAC Extragalactic Database. Using the Digitized Sky Survey, we identify optical counterparts for almost half of the newly cataloged galaxies, which are typically of irregular or Magellanic morphological type. Several H I sources appear to be associated with compact groups or pairs of galaxies rather than an individual galaxy. The majority ( 57) of the newly cataloged galaxies lie within 10degrees of the Galactic plane and are missing from optical surveys as a result of confusion with stars or dust extinction. This sample also includes newly cataloged galaxies first discovered by Henning et al. in the H I shallow survey of the zone of avoidance. The other 30 newly cataloged galaxies escaped detection because of their low surface brightness or optical compactness. Only one of these, HIPASS J0546-68, has no obvious optical counterpart, as it is obscured by the Large Magellanic Cloud. We find that the newly cataloged galaxies with -b->10degrees are generally lower in H I mass and narrower in velocity width compared with the total HIPASS BGC. In contrast, newly cataloged galaxies behind the Milky Way are found to be statistically similar to the entire HIPASS BGC. In addition to these galaxies, the HIPASS BGC contains four previously unknown H I clouds.

Gènere i identitats en la construcció d'una comunitat colonial a Empúries (segles VI-V a.C.)

El projecte de recerca ha analitzat la complexitat ètnica, social i de gènere de l’assentament colonial d’Empúries a partir d’un exhaustiu estudi contextual dels materials ceràmics d’ús quotidià provinents de diferents sectors excavats als anys vuitanta a la Neàpolis empuritana (N-7000, N-5000 i N-1000). Aquests sectors datats els segles V i IV a.C., corresponen a un moment en el qual s’està construint una identitat colonial diferenciada en l’espai emporità. La comparació dels aixovars domèstics usats quotidianament pels habitants d’aquest tres sectors situats en punts distants de la Neàpolis mostra que estem davant d’un assentament colonial molt heterogeni, on conflueixen materialitats, tradicions tecnològiques i pràctiques quotidianes iberes, gregues i híbrides. Els estudis de materials confirmen que no va existir una segregació espacial entre poblacions d’origen grec i iber en aquest assentament i suggereixen la cohabitació de gent –tant d’homes com de dones- d’origen grec i iber a les diferents àrees estudiades d’aquest assentament portuari. En el registre material ceràmic de totes les zones estudiades s’observa un predomini dels productes ceràmics de tradició grega (colonials o àtics) en els serveis de taula, però no així en els estris utilitzats a la cuina, que són majoritàriament de tradició ibera. També els materials ceràmics relacionats amb l’emmagatzematge domèstic i amb el transport i el comerç (àmfores) són predominantment ibers. Aquest patró suggereix que els ibers que van cohabitar amb els grecs al port emporità no van assumir en tots els casos posicions subalternes, sinó que tingueren un rol rellevant en la gestió econòmica i comercial d’aquest espai portuari.

A V beta 4-specific superantigen encoded by a new exogenous mouse mammary tumor virus.

The superantigen (SAg) expressed by mouse mammary tumor virus (MMTV) has been shown to play an essential role in the course of the viral life cycle. In the present study, we describe a V beta 4-specific SAg encoded by a new exogenous MMTV carried by the SIM mouse strain. This is the first report of a viral or bacterial SAg reacting with mouse V beta 4+ T cells. Injection of MMTV(SIM) into adult BALB/c mice leads to a rapid and strong stimulation of V beta 4+ CD4+ T cells, followed by a slow deletion of these cells. Neonatal exposure to the virus also leads to a progressive deletion of V beta 4+ T cells. In contrast to other strong MMTV SAg, this new SAg requires the presence of major histocompatibility complex class II I-E molecules to be presented efficiently to T cells. Sequence analysis revealed a new predicted amino acid sequence in the C-terminal polymorphic region of this SAg. Furthermore, sequence comparisons to the most closely related SAg with different V beta specificities hint at the specific residues involved in the interaction with the T cell receptor.

Mapping Bias Overestimates Reference Allele Frequencies at the HLA Genes in the 1000 Genomes Project Phase I Data.

Next-generation sequencing (NGS) technologies have become the standard for data generation in studies of population genomics, as the 1000 Genomes Project (1000G). However, these techniques are known to be problematic when applied to highly polymorphic genomic regions, such as the human leukocyte antigen (HLA) genes. Because accurate genotype calls and allele frequency estimations are crucial to population genomics analyses, it is important to assess the reliability of NGS data. Here, we evaluate the reliability of genotype calls and allele frequency estimates of the single-nucleotide polymorphisms (SNPs) reported by 1000G (phase I) at five HLA genes (HLA-A, -B, -C, -DRB1, and -DQB1). We take advantage of the availability of HLA Sanger sequencing of 930 of the 1092 1000G samples and use this as a gold standard to benchmark the 1000G data. We document that 18.6% of SNP genotype calls in HLA genes are incorrect and that allele frequencies are estimated with an error greater than ±0.1 at approximately 25% of the SNPs in HLA genes. We found a bias toward overestimation of reference allele frequency for the 1000G data, indicating mapping bias is an important cause of error in frequency estimation in this dataset. We provide a list of sites that have poor allele frequency estimates and discuss the outcomes of including those sites in different kinds of analyses. Because the HLA region is the most polymorphic in the human genome, our results provide insights into the challenges of using of NGS data at other genomic regions of high diversity.

Reflexões sobre o trauma cardiovascular civil a partir de um estudo prospectivo de 1000 casos atendidos em um centro de trauma de nível I: a prospective study from 1000 cases

OBJETIVO: Analisar os dados referentes a uma grande série de casos de traumas cardiovasculares exclusivamente civil operados em um único centro de trauma brasileiro. MÉTODO: Trata-se de um estudo de coorte, prospectivo, descritivo e analítico registrados entre os anos de 1998 - 2005. RESULTADOS: No período foram operados 1000 casos que acometeram principalmente homens jovens devido a armas de fogo, armas brancas/vidros e trauma contuso e cuja topografia das lesões se deu na seguinte ordem: abdominais, cervicais, torácicas e extremidades. As três síndromes mais comuns a admissão foram: hemorrágica, isquêmica e hemorrágica/isquêmica. No entanto, 34.6% dos pacientes estavam em choque hipovolêmico grave e em 85% da casuística havia lesões não cardiovasculares associadas. A maioria dos pacientes foi submetida a tratamento cirúrgico sem propedêutica específica, mas 14% destes foram reoperados devido à síndrome compartimental, trombose aguda e/ou hemorragia grave. A taxa de amputação foi de 5.5% e da mortalidade de 7.5%, estando correlacionada com choque hipovolêmico grave ou síndrome da resposta inflamatória sistêmica. Lesões CCV isoladas ocorreram em 15% dos casos com taxa de letalidade global de 41%, sendo 22% venosa, 47% arterial e 81% cardíaca, proporcionando diferença significativa entre lesões cardíacas versus arteriais e venosas associadas (p = 0,01; odds ratio de 7.37) e lesões arteriais versus venosas (p = 0,01; odds ratio de 3.17). CONCLUSÃO: Esta grande série de casos demonstrou ser o homem jovem o mais acometido devido principalmente à violência interpessoal e os acidentes automobilísticos, que envolvem na maioria das vezes as extremidades, associadas com lesões em outros órgãos ou sistemas. Os fatores preditivos de mau prognóstico foram choque hipovolêmico, lesão de grandes vasos arteriais e lesão cardíaca.

« Estat des vivres et artillerie et municions servans à icelle, trouvez en municion es villes de frontière et places fortes de Picardie, Arthois et Boullenois, et d'autres vivres, artillerie, municions et artifices, que demandent d'augmentacion les cappitaines desd. villes et places ; aussi des reparacions necessaires à faire esd. villes et places pour la fortifficacion et seureté d'icelles. M.V.C.XLIII ».

Contient : 1 « Estat des victuailles et municions d'artillerie et autres trouvées au chasteau de Hesdin, le 23e jour de janvier, l'an 1543. Victuailles. Et est assavoir que tout grain est rendu à la mesure et muy de Paris, et la livre à poix de marc, qui est de seize onces pour livre... Faict au chasteau de Hesdin, le 25e jour de janvier l'an 1543 ». Signé : « A. DE PISSELEU » ; 2 « Estat des victuailles et artillerie et municions servans à lad. artillerie et autres que demande monseigneur de Hely, cappitaine et gouverneur des ville, chasteau et bailliage de Hesdin, pour la nourriture des gens de guerre et autres qui seront ordonnez pour la garde et seureté dud. chasteau et municion d'icelluy, et ce pour le parfaict de six mois, oultre les aultres victuailles, artillerie et municions qui y sont de present, et autres victuailles qui y doivent estre mises par Mathieu Camus, aiant la charge du renouvellement et refreschissement d'icelles ». Même date et même signature que plus haut ; 3 « Reparacions necessaires à faire au chasteau de Hesdin ». Même date et même signature que plus haut ; 4 « Estat des victuailles et artillerie et municions servans à lad. artillerie, et autres trouvées ès ville et chasteau de Boullongne sur la Mer, le 28e janvier, l'an 1543... Fait aud. Boullongne sur la Mer, le 29e jour de l'an 1543 ». Signé : « OUDART DU BIES » ; 5 « Estat des victuailles et artillerie et municions servans à lad. artillerie et autres que demande M. Du Biez, mareschal de France, cappitaine et gouverneur des ville et chasteau de Boullongne sur la Mer... et ce pour six mois... ». Même date et même signature que pour l'article 4 ; 6 « Reparacions necessaires à faire en la ville de Boullongne sur la Mer, pour la fortifficacion et seureté d'icelle... Fait à Boullongne sur la Mer, le premier jour de fevrier, l'an 1543 ». Signé comme précédemment ; 7 « Estat des victuailles et artillerie et municions servans à lad. artillerie et autres estans en la ville d'Ardre, le 30e jour de janvier 1543... Fait à Ardre » ledit jour. Non signé ; 8 « Estat des victuailles et artillerie et municions servans à lad. artillerie et autres que demande le Sr de Sainseval, cappitaine et gouverneur de la ville d'Ardre, pour la provision et seureté de lad. ville et la nourriture de sept vingtz dix (150) lances fournies des ordonnances du roy, deux mil hommes de pié et deux cens pionniers, qui sont environ deux mil huit cens bouches pour six mois, et ce oultre les autres victuailles et municions estans en lad. ville... Fait à Ardre, le 30e jour de janvier 1543 ». Non signé ; 9 « Estat des reparacions necessaires à faire en la ville d'Ardre pour la fortifficacion et seureté d'icelle ». Même date. Non signé ; 10 « Estat des pièces d'artillerie, pouldres, boulletz et autres munitions servans à icelle, trouvées en la ville de Monstreuil sur la Mer, le 3e jour de fevrier, l'an 1543 ». Signé : « J. M. DE SENLYS » ; 11 « Estat des victuailles et artillerie et municions servans à lad. artillerie et autres, que demande le Sr de Senlis, cappitaine et gouverneur des ville et chasteau de Monstereul sur la Mer, pour la nourriture et conservacion des gens de guerre et autres qui seront ordonnez pour la garde et seureté desd. ville et chasteau, et ce oultre l'artillerie et municions estans de present aud. Monstereul ». 4 février 1543 ; 12 « Reparacions necessaires à faire promptement et à dilligence en la ville de Monstereul sur la Mer ». Même date ; 13 « Estat des pièces d'artillerie et municions servans à icelle, trouvées dedans le chasteau du Crottoy, le lundy quatreme jour de fevrier, l'an 1543 » ; 14 « Estat de l'artillerie et municions servans à icelle, et harnois et bastons de guerre trouvez au chasteau d'Abbeville, le mardy cinqme jour de fevrier... 1543 » ; 15 « Estat des victuailles et artillerie et municions servans à icelle et autres trouvées au chasteau de Doullens, le mercredy sixme jour de fevrier, l'an 1543, estant aud. chasteau le cappitaine Florent de Mailly, lieutenant de monseigneur de Bochavannes, cappitaine d'icelluy ». Signé : « F. DE MAILLY » ; 16 « Estat des pièces d'artillerie et municions servans à icelle et autres que demande le cappitaine Florent de Mailly, lieutenant de monseigneur de Bochavannes, cappitaine gouverneur des ville et chasteau de Doullens, pour la municion et seureté dud. chasteau, et ce oultre les autres pièces d'artillerie et municions qui sont de present en icelluy... Faict aud. chasteau de Doullens, le jeudy septme jour de fevrier l'an 1543 ». Signé : « F. de Mailly » ; 17 « Estat des pièces d'artillerie et municions servans à icelle et autres appartenans au roy, trouvées en la ville d'Amyens, le vendredy huitme jour de fevrier, l'an 1543, en la charge et garde de Arthus Tourtier, commis aud. Amyens de maistre Anthoine Macault, tresorier et garde desd. artillerie et municions et bastons de guerre dud. Sr estans en ses païs de Normandie, Picardie et Champaigne... Fait aud. Amyens, le samedy neufme jour de fevrier 1543 ». Signé : « TOURTIER » ; 18 « Estat de l'artillerie et municions servans à icelle, bastons de guerre et oustilz à pionniers, charrons et autres, trouvez en la ville de Corbie, le lundy 11e jour de fevrier, l'an 1543... Fait aud. Corbie, le 13e jour de fevrier, l'an 1543 ». Signé : « PHELIPPES DE MYRAUMONT » ; 19 « Estat des pièces d'artillerie et municions servans à icelle et autres que demande le Sr de Miraumont, gouverneur de la ville de Corbie, pour la provision, seureté et deffence de lad. ville, et ce oultre les autres pieces d'artillerie et municions qui sont de present en icelle ». Même date ; 20 « Ouvraiges et reparacions necessaires à faire en la ville de Corbie, pour la deffence et seureté d'icelle et conservacion de la frontiere ». Même date ; 21 « Estat de l'artillerie et municions servans à icelle, trouvées au chasteau de Peronne le jeudy 14e jour de fevrier, l'an 1543 ». Signé : « A. ROBIN DE BOFFLES » ; 22 « Estat de l'artillerie et municions servans à icelle et autres trouvées en la ville de Peronne, le jeudy 14me jour de fevrier, l'an 1543 ». Signé : « J. B. VIDELAINE » ; 23 « Estat des pièces d'artillerie et municions servans à icelle, bastons de guerre et autres provisions dont les majeur et jurez de la ville de Peronne supplient très humblement le roy, leur seigneur souverain, fournir lad. ville pour la seureté, tuicion et deffense d'icelle, et ce oultre les autres pièces d'artillerie et municions qui y sont de present » Signé : « J.-B. VIDELAINE » et « A. LESCARS » ; 24 « Estat des victuailles et artillerie et municions servans à icelle et autres estans au chastelet de Gouy, le 15e jour de fevrier, l'an 1543 » ; 25 « Estat des victuailles et municions d'artillerie et autres que demande le Sr de Jenonville, lieutenant du Sr d'Estrée, cappitaine du chastellet de Gouy, pour la provision et seureté dud. chasteau et la nourriture de 60 lances fournies des ordonnances du roy, 1000 hommes de pié et 200 pionniers, qui sont environ, comprins la suitte, 1500 bouches, pour six mois, et ce oultre les autres victuailles et municions estans en icelluy chasteau ». Même date ; 26 « Estat des pièces d'artillerie et municions servans à icelle et autres, trouvées en la ville de S. Quentin, le samedy 16me jour de fevrier, l'an 1543... Fait aud. S. Quentin, le 18me jour de fevrier 1543 ». Signé : « C. AZEY » et « GUIENCOURT » ; 27 « Estat des pièces d'artillerie et municions servans à icelle, dont les mayeur, eschevins et jurez de la ville de S. Quentin en Vermandois supplient très humblement le roy, leur seigneur souverain, faire fournir lad. ville, pour la seureté, tuicion et deffence d'icelle, oultre les autres pièces d'artillerie et municions qui y sont de present ». Même date et mêmes signatures ; 28 « Ouvraiges et reparacions necessaires à faire en la ville de S. Quentin, lesquelz ouvraiges et reparacions les mayeur, eschevins et jurez de lad. ville supplient très humblement au roy, leur seigneur souverain, ordonner estre faictes, pour la conservacion, deffense et seureté d'icelle ville et de la frontière... Fait aud. S. Quentin, le 20e jour de fevrier, l'an 1543 ». Mêmes signatures ; 29 « Estat des victuailles et artillerie et municions servans à icelle et autres, trouvées ès ville et chastel de Landrecy, le jeudy 21e jour de fevrier, l'an 1543... Fait le 22e jour de fevrier, l'an 1543 » ; 30 « Estat des victuailles et municions d'artillerie, bastons de guerre et autres municions que demande le Sr de Vrevin, cappitaine et gouverneur des ville et chastel de Landrecy, pour la provision et seureté desd. ville et chastel, et ce oultre les autres victuailles, artillerie et municions y estans ». Même date ; 31 « Estat des pièces d'artillerie et municions servans à icelle, trouvées au chasteau de Guise, le vendredy 22e jour de fevrier 1543 ». Signé : « J. DE SORBEY » ; 32 « Estat des vivres et pièces d'artillerie et municions servans à icelle et autres, que demande le Sr de Girondelle, cappitaine et gouverneur des ville, chastel et duché de Guise, pour la provision, municion et seureté dud. chastel et l'advitaillement de cent lances fournies des ordonnances du roy, et 1200 hommes de pié, qui sont, comprins la suitte, environ 1800 bouches, pour deux mois, et ce oultre les autres pièces d'artillerie et municions qui sont de present en icelluy... Fait aud. chastel de Guise, le samedy 23e jour de fevrier, l'an 1543 ». Signé : « J. de Sorbey » ; 33 « Ouvraiges et reparacions necessaires à faire au chasteau de Guise, pour la seureté et deffence d'icelluy et conservacion de la frontiere ». Même date et même signature ; 34 « Estat des victuailles et artillerie et municions servans à lad. artillerie et autres, trouvées au chastel de La Chappelle, le 24e jour de fevrier, l'an 1543 » ; 35 « Estat des victuailles et artillerie et municions servans à icelle et autres que demande le Sr de Haraucourt, cappitaine et gouverneur du chasteau de La Chappelle, pour la provision et seureté dud. chasteau, et la nourriture des gens de guerre et autres qui seront ordonnez pour la garde d'icelluy, estimez à 2,000 bouches ». Même date que ci-dessus ; 36 Table des noms des places fortes indiquées ci-dessus, rangées par ordre alphabétique sous les rubriques : « Estat des vivres », etc. et « ouvraiges necessaires », etc

Catalisadores de vanádio (V) contendo ligante tris(pirazolil)borato : rotas de imobilização e avaliação em polimerização de etileno

As sínteses, caracterizações e estudos referentes a polimerização do etileno de uma série de complexos {TpMs*}V(NtBu)Cl2 (1), {TpMs*}V(O)Cl2 (2), {TpMePh]V(NtBu)Cl2 (3) e {Tp*}V(O)Cl2 (4) são descritas. A reação destes complexos com MAO geram espécies catalíticas ativas para a polimerização do etileno. Para as reações de polimerização realizadas em tolueno a 30°C, as atividades variaram entre 71 e 1.126 kg de PE/mol[V]·h·atm. A atividade mais alta foi obtida usando o precursor catalítico 1. As curvas de DSC mostraram a formação de polietileno de alta densidade com temperaturas de fusão entre 134 e 141ºC. Visando a obtenção de catalisadores suportados, o complexo 1 foi imobilizado através do método direto sobre os seguintes suportes inorgânicos: SiO2, SiO2 modificada com MAO, SiO2-Al2O3, MCM-41, MgO e MgCl2. O teor de metal imobilizado, determinado por XRF, permaneceu entre 0,22 e 0,50 % g V/g suporte (p/p %).Os maiores teores de metal foram encontrados para os suportes com maiores áreas superficiais (SiO2–Al2O3 e MCM-41). Todos os sistemas mostraram-se ativos na polimerização do etileno na presença de MAO ou TiBA/MAO (1:1) (Al/V = 1000). A atividade catalítica mostrou-se dependente da natureza do suporte, ficando esta entre 8 e 89 kg de PE/mol[V]·h·atm. Os melhores resultados foram obtidos para sílica. Suportes ácidos ou básicos forneceram sistemas catalíticos menos ativos. Os polietilenos apresentaram pesos moleculares médios (Mw) superiores a 2.000.000 g/mol, sugerindo a produção de polímeros com ultra-alto peso molecular. Baseado nos resultados referentes a imobilização de 1, o complexo 2 foi imobilizado sobre SiO2 e SiO2 modificada com MAO. As reações de polimerização deste catalisador suportado foram realizadas em tolueno a 30ºC, utilizando MAO ou TiBA/MAO (1:1) (Al/V = 1000). Os resultados de atividade variaram entre 7 e 236 kg de PE/mol[V]·h·atm, sendo a maior atividade encontrada para o sistema suportado 2/SiO2/MAO(4,0 % Al/SiO2) na presença da mistura de cocatalisadores TiBA/MAO (1:1). Os complexos 1 e 2 foram imobilizados “in situ” utilizando SiO2 e SiO2/MAO (4,0 % em peso de Al/SiO2) como suportes, empregando 0,02 % em peso de V/g suporte. Todos os sistemas estudados foram ativos nas reações de polimerização do etileno. Para o complexo 1, a maior atividade (1.903 kg de PE/mol[V]·h·atm) foi obtida utilizando o sistema 1/SiO2/MAO (4,0 % em peso de Al/SiO2) na presença do MAO. Cabe ressaltar que, para este sistema catalítico, o uso de TMA ao invés de MAO proporciona a formação de um sistema catalítico altamente ativo (1.342 kg de PE/mol[V]·h·atm). A maior atividade (1.882 kg de PE/mol[V]·h·atm) para o complexo 2 foi encontrada quando o mesmo foi suportado “in situ” sobre SiO2, utilizando MAO como cocatalisador. O catalisador de vanádio preparado “in situ” sobre o suporte na presença do MAO apresentou uma atividade catalítica de 22 kg de PE/mol[V]·h·atm) sendo a mesma inferior àquela obtida utilizando o sistema via imobilização do catalisador “in situ”. Várias rotas sintéticas (hidrolíticas e não-hidrolíticas) objetivando a preparação “in situ” do catalisador sobre sílicas-híbridas foram empregadas, entretanto todas as tentativas falharam devido à alta reatividade do grupo NCO com alguns reagentes empregados no processo de preparação das mesmas. Uma série de catalisadores híbridos foram preparados pela combinação e imobilização seqüencial de {TpMs*}V(NtBu)Cl2 (1) e [LFeCl2] (8) (L = 2,6-bis(imino)piridila) sobre SiO2/MAO (4,0% em peso de Al/SiO2) em diferentes proporções (1:1) e (1:3). Todos os sistemas foram ativos na polimerização do etileno na presença de MAO como cocatalisador. A atividade mostrou-se dependente da natureza do complexo e da ordem de imobilização. A maior atividade foi obtida para o sistema V/Fe/SMAO-4 (1:1) (117 kg de PE/mol[M]·h·atm). Baseado nas curvas de DSC, diferentes tipos de PE podem ser obtidos dependendo da natureza do complexo imobilizado e da ordem da adição dos catalisadores no suporte. Para os sistemas híbridos, a presença do Fe determina a formação de PE com dois picos de fusão.

Search for a standard-model-like Higgs boson with a mass in the range 145 to 1000 GeV at the LHC

A search for a standard-model-like Higgs boson in the H→WW and H→ZZ decay channels is reported, for Higgs boson masses in the range 1451000 GeV. The search is based upon proton-proton collision data samples corresponding to an integrated luminosity of up to 5.1 fb-1 at √s = 7 TeV and up to 5.3 fb-1 at √s = 8 TeV, recorded by the CMS experiment at the LHC. The combined upper limits at 95 % confidence level on products of the cross section and branching fractions exclude a standard-model-like Higgs boson in the range 145V, thus extending the mass region excluded by CMS from 127-600 GeV up to 710 GeV. © 2013 CERN for the benefit of the CMS collaboration.