Efeito de óleo essencial de alfavaca cravo (Ocimum gratissimum) no controle de parasitos monogenóides de tilápia do Nilo (Oreochromis niloticus).

O presente trabalho teve por objetivo avaliar a eficácia do óleo essencial de Ocimum gratissimum para o controle de monogenóides em tilápias (O. niloticus). O ensaio in vitro foi inteiramente casualizado com 5 tratamentos e 3 repetições : controle 1 (água de confinamento), controle 2 (água + álcool 70%), tratamento 1 (40 mg/L de óleo de alfavaca cravo), tratamento 2 (160 mg/L de óleo) e tratamento 3 (320 mg/L de óleo) utilizando 5 monogenóides por tratamento. A mortalidade dos parasitas foi avaliada durante 5 horas. Para o Cl50, o teste definitivo utilizou 18 recipientes, 4 peixes em cada e durou 96 horas. Foi utilizado delineamento inteiramente casualizado (DIC) com 5 concentrações de óleo de alfavaca cravo (20, 40, 60, 80 e 100 mg/L) e um controle, e 3 repetições por concentração. A mortalidade foi avaliada a cada 6 horas com a remoção dos peixes mortos. Para o ensaio in vivo foram utilizadas 4 concentrações: 9 mg/L de alfavaca cravo, 40 mg/L (em banhos longos), 160 e 320 mg/L em banhos terapêuticos curtos. As tilápias foram distribuídas em 15 aquários de 90 l, contendo 5 peixes em cada. Foi utilizado DIC com 5 tratamentos (sendo 1 controle) e 3 repetições. Os banhos terapêuticos longos duraram 48 horas, e os curtos 3 tardes consecutivas com duração de 5 minutos (320 mg/L) e 10 min (160 mg/L). Para avaliar a eficácia 15 peixes do controle e 3 de cada tratamento foram sacrificados para retirada de brânquias e fixadas em formol 10%. A quantificação dos monogenóides foi feita com auxílio do estereomicroscopio e os resultados foram utilizados para calcular a prevalência, intensidade média de infestação, total de parasitas, sobrevivência bem como a eficácia. No in vitro a concentração mais eficiente no controle de monogenóides foi 320 mg/L, o CL5o foi de 40,70 mg/L e no ensaio in vivo a melhor eficácia foi no tratamento 320 mg/L (88,73%) e a infestação foi menor no 320 e 160mg/L, sendo as concentrações indicadas para o controle de monogenóides em tilápias

A multichannel reflectometer for edge density profile measurements at the ICRF antenna in ASDEX upgrade

A multichannel reflectometer will be built for the new three-straps ICRF antenna of ASDEX Upgrade (AUG), to study the density behavior in front of it. Ten different accesses to the plasma are available for the three reflectometer channels that can be interchanged without breaking the machine vacuum. Frequency is scanned from 40 GHz to 68 GHz, in 10 mu s, which corresponds to a cut-off density ranging from 10(18) divided by 10(19)m(-3) in the Right cut-off of the X-mode propagation, for standard toroidal magnetic field values of AUG

Skin lesion detection and classification using convolutional neural network for deep feature extraction and support vector machine

Pigmented skin lesion identification is essential for detecting harmful pathologies related to this large organ, especially cancer. An analysis of the different methods and projects developed to diagnose these illnesses throughout the years showed that they had become very useful tools to identify melanoma, dermatofibroma, and basal cell carcinoma, among other types of cancer, are seen through the use of new computer-aided technologies. The most common diagnosis is based on dermoscopy and the dermatologist expertise that can improve accuracy with image detection techniques and classification by computer. Therefore, this study aims to develop software models able to detect and classify skin cancer. The following work is based on the use of dermoscopy images obtained from the HAM10000 dataset, a database with 10000 images previously tested and validated for research use. The main process is divided into three relevant parts: image segmentation, feature extraction (FE) using ten different pre-trained Convolutional Neural Networks (CNNs), and Support Vector Machine (SVM) to establish a classification model. According to the results, the models of classification performed very well using the image segmentation step, showing average accuracies between 80.67% (Xception) and 90% (Alexnet). In contrast to the process without using image segmentation, where no method reached 60%. AlexNet plus SVM model showed the minor running time and presented the higher accuracy rate (90.34%) for the correct identification and classification of the seven categories of cutaneous lesions taken into account

Carbon stars in the X-shooter Spectral Library

We provide a new collection of spectra of 35 carbon stars obtained with the ESO/VLT X-shooter instrument as part of the X-shooter Spectral Library project. The spectra extend from 0.3$\mu$m to 2.4$\mu$m with a resolving power above $\sim$ 8000. The sample contains stars with a broad range of (J-K) color and pulsation properties located in the Milky Way and the Magellanic Clouds. We show that the distribution of spectral properties of carbon stars at a given (J-K) color becomes bimodal (in our sample) when (J-K) is larger than about 1.5. We describe the two families of spectra that emerge, characterized by the presence or absence of the absorption feature at 1.53$\mu$m, generally associated with HCN and C$_2$H$_2$. This feature appears essentially only in large-amplitude variables, though not in all observations. Associated spectral signatures that we interpret as the result of veiling by circumstellar matter, indicate that the 1.53$\mu$m feature might point to episodes of dust production in carbon-rich Miras.Comment: 29 pages, 21 figures, 9 tables, Accepted for publication in A&

Caracterización de las Pautas de Crianza que Utilizan los Padres de Niños con Trastorno Espectro Autista

El objetivo del estudio caracterizar las pautas de crianza que utilizan los padres de niños y niñas con trastorno del espectro autista de 2 a 5 años, bajo un enfoque cualitativo bajo un diseño y alcance fenomenológico, en donde la población con la que se realizara la presente investigación serán padres de familia de niños entre 2 a 5 años de edad que tienen un diagnostico con espectro autista de las instituciones educativas de Preescolar Mundo Infantil Pachi y el Hogar Infantil el Manantial, se aplicaran como instrumentos una entrevista semi estructurada a los padres, un grupo focal para recolectar experiencias relacionadas con el espectro autista y la observación no participante para recolectar información asociada con la experiencia de las docentes, para finalizar se espera el análisis y triangulación de la información recolectada por medio de los instrumentos para poder dar respuesta a los objetivos planteados para la propuesta de investigación

Teste "in vitro" do óleo essencial de Ocimum gratissimum no controle de Trichodina sp.

Esse estudo objetivou determinar a eficiência da utilização de O. gratissimum no controle "in vitro" de Trichodina sp

Utilização do óleo essencial de alfavaca cravo (Ocimum gratissimum) no controle de monogenóides de tilápia (Oreochromis niloticus).

O presente trabalho objetivou avaliar a eficácia do óleo essencial de Ocimum gratissimum para o controle de Cichlidogyrus tilapiae em tilápias (Oreochromis niloticus)

The braid groups of the projective plane and the Fadell-Neuwirth short exact sequence

International audienceWe study the pure braid groups $P_n(RP^2)$ of the real projective plane $RP^2$, and in particular the possible splitting of the Fadell-Neuwirth short exact sequence $1 \to P_m(RP^2 \ {x_1,...,x_n} \to P_{n+m}(RP^2) \stackrel{p_{\ast}}{\to} P_n(RP^2) \to 1$, where $n\geq 2$ and $m\geq 1$, and $p_{\ast}$ is the homomorphism which corresponds geometrically to forgetting the last $m$ strings. This problem is equivalent to that of the existence of a section for the associated fibration $p: F_{n+m}(RP^2) \to F_n(RP^2)$ of configuration spaces. Van Buskirk proved in 1966 that $p$ and $p_{\ast}$ admit a section if $n=2$ and $m=1$. Our main result in this paper is to prove that there is no section if $n\geq 3$. As a corollary, it follows that $n=2$ and $m=1$ are the only values for which a section exists. As part of the proof, we derive a presentation of $P_n(RP^2)$: this appears to be the first time that such a presentation has been given in the literature