Controle de surtos de tristeza parasitária bovina.

No Brasil, os agentes causadores da Tristeza Parasitária Bovina (TPB) são dois protozoários (Babesia bovis e Babesia bigemina) e uma rickettsia (Anaplasma marginale), sendo que a doença pode ser causada por um, dois ou os três agentes juntos.bitstream/item/55746/1/CR26-02.pd

Controle/profilaxia da tristeza parasitária bovina.

O complexo de doenças que inclui a babesiose e a anaplasmose é conhecido, no Brasil, como Tristeza Parasitária Bovina (TPB).bitstream/item/55745/1/ct38-2001.pd

Profilaxia da tristeza parasitária bovina: por quê, quando e como fazer.

A tristeza parasitária bovina - TPB, é um sério entrave econômico na pecuária bovina, pois além de apresentar altos índices de mortalidade e morbidade, é motivo de perdas de oportunidade e de mercado também, por parte dos produtores, de desestímulo em melhorar a produção.bitstream/item/55691/1/CR28-02.pd

A ring in a shell: the large-scale 6D structure of the Vela OB2 complex

The Vela OB2 association is a group of 10 Myr stars exhibiting a complex spatial and kinematic substructure. The all-sky Gaia DR2 catalogue contains proper motions, parallaxes (a proxy for distance) and photometry that allow us to separate the various components of Vela OB2. We characterise the distribution of the Vela OB2 stars on a large spatial scale, and study its internal kinematics and dynamic history. We make use of Gaia DR2 astrometry and published Gaia-ESO Survey data. We apply an unsupervised classification algorithm to determine groups of stars with common proper motions and parallaxes. We find that the association is made up of a number of small groups, with a total current mass over 2330 Msun. The three-dimensional distribution of these young stars trace the edge of the gas and dust structure known as the IRAS Vela Shell across 180 pc and shows clear signs of expansion. We propose a common history for Vela OB2 and the IRAS Vela Shell. The event that caused the expansion of the shell happened before the Vela OB2 stars formed, imprinted the expansion in the gas the stars formed from, and most likely triggered star formation.Comment: Accepted by A&A (02 November 2018), 13 pages, 9+2 figure

Curso de atualização sobre Tristeza Parasitaria Bovina (TPB).

A tristeza Parasitária Bovina (TPB) é um complexo de doenças que no nosso meio é causado principalmente por Babesiose e Anaplasmose, além de envolver a presença do carrapato Boophilus microplus. Este conjunto de enfermidade é uma das principais senão a maior preocupação dos produtores de bovinos da Região Sul do Brasil, pois traz importantes prejuízos econômicos por mortalidade e morbidade. Portanto é oportuno trazer o assunto à discussão para a atualização do conhecimento de técnicos e produtores rurais.bitstream/item/110567/1/CURSO-DE-ATUALIZACAO-SOBRE.pd

Graphene edge method for three-dimensional probing of Raman microscopes focal volumes

In this work, a layer of graphene was used as a standard material for the measurement of the dimensions of Raman microscopes focal volumes of different confocal Raman spectrometers equipped with different objectives and excitation laser wavelengths. This method consists in probing the volume near the focal point of the system by using a flat graphene monolayer sheet with a straight edge. Graphene was selected because of its high Raman cross section and mechanically and chemically stability, allowing fast measurements and easy manipulation. In this paper, a method to employ graphene to accurately and precisely measure the three dimensions of the focal volume of a Raman microscope is presented; scanning along the axial and lateral directions, it is possible to reconstruct the three dimensions of the focal volume. Furthermore, these operations can be combined in a single procedure which allows the measurement of projections of the volume on planes parallel to the optical axis. Knowledge of these parameters enable absolute quantification of Raman-active molecules and support high-resolution Raman imaging

Graphene edge method for three-dimensional probing of Raman microscopes focal volumes

In this work, a layer of graphene was used as a standard material for the measurement of the dimensions of Raman microscopes focal volumes of different confocal Raman spectrometers equipped with different objectives and excitation laser wavelengths. This method consists in probing the volume near the focal point of the system by using a flat graphene monolayer sheet with a straight edge. Graphene was selected because of its high Raman cross section and mechanically and chemically stability, allowing fast measurements and easy manipulation. In this paper, a method to employ graphene to accurately and precisely measure the three dimensions of the focal volume of a Raman microscope is presented; scanning along the axial and lateral directions, it is possible to reconstruct the three dimensions of the focal volume. Furthermore, these operations can be combined in a single procedure which allows the measurement of projections of the volume on planes parallel to the optical axis. Knowledge of these parameters enable absolute quantification of Raman-active molecules and support high-resolution Raman imaging

High resolution nuclear magnetic resonance spectroscopy (NMR) studies on meat components: potentialities and prospects

In recent years, increasing application of nuclear magnetic resonance (NMR) spectroscopy in the study of the agricultur- al food products has been remarked, thanks to the advantages of this technique over other conventional analytical tech- niques. This preliminary work presents, for the first time, the application of an innovative NMR technique, the proton high resolution magic angle spinning (1H HR-MAS), for studying meat features. It stresses that this method makes it pos- sible to acquire qualitative and quantitative information about chemical composition, both quickly and without any par- ticular preparation of the sample to be analysed. Finally, the study highlights the potentiality of this method in defining the origin of meat and the possibility of identifying meat adulteration

Search for periodicities near 59 s in the COS-B gamma-ray data of 2CG195+04 (Geminga)

The COS-B data relating to five observations in the general direction of Geminga, spanning 6.7 years, were searched for pulsation near 59 s. The SAS-2 indication is not confirmed. An indication of a 59 s pulsation in the gamma ray emission from 2CG195+04 (Geminga) was reported. Early analysis of COS-B data supported the result while later improved statistics did not confirm it. Subsequently, detection of a 59 s pulsation in the emission from the direction of Geminga at ultra high gamma and X-rays was reported. Geminga was identified with the X-ray source 1E0630+128. The final COS-B data on Geminga which was observed five times for a total of 214 days are reported