bluuebunny/crossref_metadata_2025 huggingface dataset:
THE CHARACTERISTIC OF COMPOUND FEEDS FOR TILAPIA FISH
Authors: FIHURSKA L. V. , THORENKO, V. V.
Published: November 2019

The article states that, according to the literature review, in aquaculture of freshwater fish species that acquire everincreasing production volumes, tilapia is leading with 17%, and it is follower by carp (15% of world volume). For almost 60 years, tilapia have moved into second place in the global fish production, with the prospect of taking first place in the next 2-3 years and overtake carp in world production. Since fish is a rich source of proteins and essential amino acids, vitamins, polyunsaturated fatty acids, macro and micronutrients, it is also an important component of the diet of the population. Meat of tilapia is dense, non-fat, protein content close to trout meat, does not contain intermuscular bones. One of the priorities of the development of fish farming in Ukraine is the cultivation of tilapia. The amount of feed consumption in the world is increasing every year, due to the rapid growth in demand for tilapia. Currently, Ukrainian businessmen are interested in the production of catfish and tilapia. The most famous aquapride plants that grow these breeding objects are Lauren Aquaculture LLC (Rivne region), Aqua System Organic LLC (Kiev region), Catfish from Pavlysh TM (Kirovograd region), TM “First City Fish Farm ‘’I want a catfish ”(Kiev). That is why the production of balanced domestic feed for tilapia is an important task of the feed industry of Ukraine. The theoretical study was devoted to the issue of tilapia feed production. The nutritional value of feed for tilapia depends on the stage of the life cycle of this species of fish. It was shown the world leading manufacturers of feed for tilapia, it was analyzed the nutritional value of feed for this species of fish on the content of crude protein in the starting, growth and finishing periods, respectively. The requirements for the content of essential nutrients, essential amino acids, minerals (micro and micronutrients), water-and fat-soluble vitamins and restrictions on the content of crude fiber are given. The programs of feeding of tilapia of various producers are analyzed and an own program of feeding this species of fish is developed, it is divided the starting, growth and finishing period of tilapia growing. For starter mixed feeds for tilapia, the content of crude protein should be at least 45%, crude fat at least 12%, crude fiber not more than 1.5%, gross energy not less than 18 MJ, crude ash not more than 8%. For grower’s feeds, the content of crude protein should be at least 40 %, crude fat at least 12%, crude fiber not more than 3%, gross energy not less than 17 MJ, crude ash not more than 9.5%. For finishing feeds, the content of crude protein should be at least 30 %, crude fat at least 6%, crude fiber not more than 5%, gross energy not less than 17 MJ, crude ash not more than 7%. Amino acids requirements are very important for tilapia fish, feeds for tilapia from any period should contain lysine should be at least 1.6%, methionine should be at least 0.7 %.
PRODUCTION TECHNOLOGIES OF FORMED PREMIXES
Authors: MAKARYNSKA, A. V. , IEGOROV B. V.
Published: November 2019

The article presents theoretical analysis and practical experience of the production of premixes (P) by different technologies of preparation of the filler. Their advantages and disadvantages are stated. The classification of premix fillers is presented and the distribution of biologically active substances in the premix composition, which is made on different fillers, is schematically presented. The technology of production of a complex filler premixes (CFP) in the form is theoretically and practically substantiated. Various methods of forming depending on the composition of the complex filler are considered, as well as the technological scheme of their production is presented. The results of industrial approbation of technologies of forming (granulation, briquetting, rolling, extrusion) of fillers and ready premixes in the production conditions of TG "VBA" "Izvestnyaki" are presented. The physical indicators of the formed complex fillers / premixes were investigated, and on the basis of the analysis of the obtaineddata it was found that granulation and briquetting can be subjected to CFP consisting of 75… 50% wheat bran and 25… 50% limestone flour. The pellet is a CFP consisting of 85% wheat bran and 15% limestone flour. Optimal technological modes of forming KNP and P in different ways have been established, as a result of which it is possible to obtain particles of P, which, upon further mixing with the feed components, ensure a high homogeneity of the finished feed. The results of the study of microbiological parameters are presented, it is established that the formation of CFP or P reduces the bacterial flora and improves the conditions during their storage. The proposed technological methods of preparation of CFP can eliminate the stratification and stabilize its composition during transportation and storage.
IMPROVEMENT OF THE COLLECTOR OUTPUT DEVICE OF THE DISK SEPARATORS
Authors: SOLDATENKO L. S. , OSTROVKYI I.
Published: November 2019

Disk separators operate on the basis of selective removal of a short fraction grain from a mixture with longer ones, for example, darnel grains and similar impurities from a mixture of wheat grains; or wheat grains from a mixture of wild oat seeds and other longer waste particles. For this purpose, the working bodies of separators— cylinders or disks — are equipped with special cavities, so called “cells”, which location, shape and size correspond to the technological operation. In the flow lines of the grain cleaning workshops of high performance flour mills, predominantly, disk separators, which construction and productivity are well-known from the scientific and technical literature, are used. In recent decades, the improved, so-called small-scale disk separators for wild oat, for example, A9-УТО-6 and some others, have been created and become widely used. Their specialties include, in particular, the lack of interdisciplinary trays in the pre-configured prefabricated input device (i.e., they are characterized by the use of unblocked WUAs). Further improvement of an unblocked WUA is possible on the basis of “The grain mixture cleaning method", which involves the location of cells on the surface of the discs, which ensures that the short particles fall out of them with a compact beam at the same angle, regardless of the distance of the cell relative to the axis of rotation. Therefore, the casting model of the disc should receive a more complex construction, which, unlike the present, mainly manual technology, is expedient to use with modern CNC milling machines.
Dificuldades de Coordenação e Políticas Educacionais no Brasil: O Caso do Ensino Fundamental
Authors: Torres Haroldo da Gama , Camelo Rafael , Castro Maria Helena Guimarães
Published: November 2019

RESUMO O artigo busca investigar o problema das falhas de coordenação no âmbito da política de Ensino Fundamental do Brasil. Os autores assumem que a migração de alunos entre redes municipais e estaduais ao longo do Ensino Fundamental pode ser considerada uma proxy de falha de coordenação no âmbito dessa política, com reflexos negativos nos termos do desempenho escolar. A análise empírica apresentada, baseada em um painel longitudinal de municípios para o período de 2007 a 2011, mostra que a transferência de alunos entre redes faz com que a evolução das notas entre o 5o e o 9o ano seja 3,6 pontos menor em Português e 5,3 pontos menor em Matemática, segundo a escala da Prova Brasil.
Growth and nutrient accumulation in the aerial part of red Pitaya (Hylocereus sp.)
Authors: Lima Denise de Castro , Mendes Nouglas Veloso Barbosa , Corrêa Márcio Cleber de Medeiros , Taniguchi Carlos Alberto Kenji , Queiroz Ronialison Fernandes , Natale William
Published: November 2019

Abstract Knowledge on the amounts of nutrients accumulated by pitaya in its different development stages allows defining the periods in which the essential elements are most required, thus contributing to the elaboration of rational fertilization programs for the crop, reducing production costs. This study aimed to evaluate the growth and nutritional requirement of red pitaya, estimating the accumulation of macro and micronutrients by the plants and determining the periods in which the greatest accumulations occur, as well as the relative growth rate and the relative nutrient absorption rate. Pitaya seedlings were planted in pots containing Argissolo Vermelho-Amarelo Eutrófico (Ultisol) and grown in the open air. The experimental design was randomized blocks, with four replicates and seven sampling times: 0, 60, 120, 180, 240, 300 and 360 DAP (days after planting). At each sampling time, length of cladodes, dry matter of the aerial part and nutrient accumulation in the aerial part were evaluated. Red pitaya plants showed a low growth rate until 60 days and, from this period, its growth increased significantly. Nutrient accumulation occurred in the following descending order: K > Ca > N > Mg = P > S > Na element > Zn > Mn > Fe > B > Cu. K and Zn were, respectively, the most exported macro and micronutrient by pitaya fruits.
Advances observed in papaya tree propagation
Authors: Costa Adelaide de Fátima Santana da , Abreu Emanuel Felipe Medeiros , Schmildt Edilson Romais , Costa Aureliano Nogueira da , Schmildt Omar
Published: November 2019

Abstract Papaya (Carica papaya L.) is a fruit tree of great economic and food interest worldwide. Its propagation can occur both sexually and asexually. Traditionally, it is propagated by seeds; however, vegetative propagation has been often used with the use of in vitro and ex vitro culture techniques. In vegetative propagation, the cutting method has been extensively explored. Research has also been developed using grafting. In recent years, papaya cultivation has also become a model for other fruit plants in the use of biotechnological techniques aiming applications ranging from germplasm conservation to genetic transformation of plants. Since the beginning of the 1970s, the culture of papaya tree tissues has been intensely studied, allowing greater control of in vitro development, especially for micropropagation, organogenesis and somatic embryogenesis techniques.
Changes in mineral nutrition during fruit growth and development of ‘Seike’ and ‘Newhall’ navel orange as a guide for fertilization
Authors: Fu Xing-Zheng , Fa Xie , Li Cao , Li-Li Ling , Chang-Pin Chun , Liang-Zhi Peng
Published: November 2019

Abstract Changes in the accumulation patterns of mineral nutrients at different development stages of fruit reflect the requirements of citrus trees for different nutrients, and this information provides an essential reference for rational fertilization. In this study, changes in the contents of 11 nutrients in the whole fruit, fruit pulp, and peel were studied during the whole developmental period of the fruit of ‘Seike’ and ‘Newhall’ navel oranges. We found that the two navel orange cultivars showed very similar changes in nutrients. Specifically, the N, P, Mg, S, Mn, and Zn contents were high in the young fruit stage (April), the K and Fe contents were high in the fruit expansion stage (July and August), and the Ca content was high in the fruit maturation stage (October). As the fruit developed, the N, P, Mg, S, Zn, and B contents decreased to the lowest levels at fruit maturity in November. In addition, the contents of N, P, K, Fe, Zn, and Cu were ranked as fruit pulp > whole fruit > peel, while Ca, Mn, and B contents were ranked as fruit peel > whole fruit > fruit pulp. N, P, K, and Mg accumulated in the fruit in June and July, in contrast to the June to September period for the micro-elements. During these accumulation periods, it is recommended that suitable fertilizers be applied in a timely manner.
Natural convection drying kinetics of ‘Prata’ and ‘D’água’ banana cultivars (Musa ssp) by nonlinear regression models
Authors: Furtado Thais Destefani Ribeiro , Muniz Joel Augusto , Silva Edilson Marcelino , Frühauf Ariana Campos , Fernandes Tales Jesus
Published: November 2019

Abstract Banana is among fruits most planted in tropical countries and belongs to the fruit group most consumed in the world; however, banana needs proper conservation techniques. The aim of this study was to describe the drying kinetics of ‘Prata’ and ‘D’água’ banana cultivars at temperatures of 40 and 70°C, comparing the Henderson, STPE, Lewis, Page and Fick regression models, estimating the Absolute Drying Rate (ADR). Parameters were estimated with R and SAS Studio softwares, using for comparison and selection models of the R²aj, RSD and corrected Akaike Information Criteria. The Page and Fick models did not adjust, and the others presented good adjustment to data. The Henderson model was the most suitable to describe data of ‘Prata’ banana at both temperatures and ‘D’água’ banana at 70°C and Lewis at 40°C for this cultivar. The drying rate of ‘Prata’ banana at temperatures of 40 and 70°C were 0.00079 g of water/ min and 0.00400 g of water/min respectively and for ‘D’água’ banana, drying rates were 0.00111 g of water/min. and 0.00495 g of water/min., respectively. Using ADR, it was observed that in one third of the drying period, there was 70% of moisture loss at 70°C.
In vitro germination to overcome dormancy in seeds of ‘Red Globe’, ‘Italia’ and ‘Niagara Rosada’ grapes
Authors: Generoso Andressa Leal , Viana Alexandre Pio , Carvalho Virginia Silva , Costa Júnior Otalício Damásio da
Published: November 2019

Abstract Dormancy in grape seeds slows the progress of many breeding programs of the crop, culminating in low uniformity and low germination percentages. Conventional methods used to overcome dormancy are time-consuming. Thus, in vitro seed germination emerges as a promising alternative to ensure the germination of grape seeds. In this study, we examined the in vitro germination and vigor of seedlings originating from seeds of ‘Red Globe’, ‘Italia’ and ‘Niagara Rosada’ grapes in growth media supplemented with five concentrations of gibberellic acid (GA3) (0, 1.41, 2.83, 4.24 and 5.66 µmol L-1) for 47 days. The use of GA3 increased seed germination percentage and seedling vigor, in the three varieties. Therefore, for the in vitro germination of seeds of ‘Red Globe’ can be used between 1.41 to 4.24 µmol L-1 of GA3. For ‘Italia’ grapes is indicated 1.41 µmol L-1 from GA3 and for ‘Niagara Rosada’ grape is as between 1.41 to 5.66 µmol L-1 from GA3 can be used.
Tendências políticas na metapsicologia da pulsão
Authors: Marino Adriana Simões
Published: November 2019

Resumo Este artigo apresenta uma hipótese sobre a existência de direções políticas inconscientemente determinadas, a partir do conceito de pulsão. A hipótese se justifica pelo reconhecimento do fenômeno da reprodução daquilo que se pretende combater e é desenvolvida em termos de repetição. Para uma apreensão desse fenômeno, considera o conflito pulsional presente na metapsicologia freudiana e seus desdobramentos na psicanálise lacaniana, em uma articulação com as tendências políticas de esquerda e direita.
Migração haitiana: o sujeito frente ao (re)encontro com o excesso
Authors: Nüske Alexandra Garcia Grigorieff , Macedo Mônica Medeiros Kother
Published: November 2019

Resumo Este artigo retrata uma pesquisa qualitativa a respeito do movimento migratório de sujeitos haitianos. Aborda-se a existência e/ou a fragilidade dos recursos de enfrentamento por parte do migrante, considerando-se que as condições do país de destino acabam, por vezes, reeditando o desamparo experimentado no país de origem. Participaram deste estudo três migrantes haitianos, que vieram para o Brasil após o terremoto ocorrido no Haiti e com os quais foram realizadas entrevistas. Os dados obtidos foram analisados por meio da Análise Interpretativa, proposta por Erickson, e explorados com colaborações teóricas da Psicanálise. Como contribuições da pesquisa estão o acesso à narrativa dos sujeitos a respeito de experiências singulares nas quais a complexidade se faz presente, bem como o destaque atribuído aos aspectos sociais, psíquicos e subjetivos a fim de que as intervenções no campo de fenômenos migratórios reconheçam o caráter imprescindível de consideração do sujeito migrante em sua complexidade.
Entre Discurso e Ato, há muito mais do que se imagina
Authors: Guirado Marlene
Published: November 2019

Resumo Este escrito visa a analisar o discurso de posse do presidente Jair Bolsonaro e os primeiros dias de seu governo, apontando para a relação entre a fala e as iniciativas concretas de governança. São feitas considerações conceituais e metodológicas para fundamentar a análise, sobretudo com base em Foucault. O conceito fundamental é o de discurso como ato. O trabalho específico sobre o pronunciamento marcou o sujeito do discurso bolsonariano: resultado do milagre de Deus, que lhe devolveu a vida, e ungido pelo Povo que o elegeu, identifica-se à Pátria, em sua vontade soberana. Com estratégias discursivas caracterizadas pela ambiguidade e seus efeitos perversos, procede a dissociações entre aqueles que são contra e aqueles a favor dele: cidadãos de bem versus outros, ideologias de esquerda versus pensamentos verdadeiros. Nisso tudo, nega-se a fonte da Verdade pontificada: o próprio presidente. Tais traços do sujeito eleito confirmam-se pelas ações iniciais de governo.
Nodulation, nitrogen uptake and growth of lima bean in a composted tannery sludge-treated soil
Authors: Rocha Sandra Mara Barbosa , Antunes Jadson Emanuel Lopes , Silva Antonio Victor Cavalcante Rocha , Oliveira Louise Melo de Souza , Aquino João Pedro Alves de , Melo Wanderley Jose de , Figueiredo Marcia do Vale Barreto , Araujo Ademir Sérgio Ferreira de
Published: November 2019

ABSTRACT: This study evaluated the responses of lima bean (Phaseolus lunatus L.) to application of composted tannery sludge on nodulation, N uptake and plant growth. For eight years, the compost was applied at rates of: 0, 2.5, 5, 10, and 20 Mg ha-1 (dry basis). Plants of lima bean showed higher nodulation in treatments with compost; however, nodules reported in these treatments presented lower biomass, size and diversity than those reported in treatment without compost. Accumulation of N increased with the application of the highest rate (20 Mg ha-1), while there was an increase in chromium content in shoot with the increase in compost rates. Thus, the use of composted tannery sludge, in long-term, increases the accumulation of chromium in plants, increasing nodulation, while decrease rhizobia diversity in nodules.
Tempo de Voo da Onda Difratada (ToFD) Auxilia na Garantia da Qualidade da Produção de Peças e Estruturas Mecânicas
Authors: Mayworm R C , Alvarenga A V , Costa-Félix R P B
Published: November 2019

Resumo A Técnica Tempo de Voo da Onda Difratada (ToFD) é uma técnica de ensaio não destrutivo por ultrassom utilizada para a detecção de falhas e descontinuidades em diferentes componentes, garantindo a qualidade, confiabilidade e segurança. É amplamente utilizada na indústria, principalmente na avaliação de peças e estruturas mecânicas. É largamente utilizada nos setores petróleo/petroquímico, químico, aeronáutico, aeroespacial, siderúrgico, naval, eletromecânico, papel e celulose, entre outros. Seu desenvolvimento e implementação no Laboratório de Ultrassom do Inmetro foi baseado na norma ISO 16828:2012 (Non-Destructive testing – Ultrasonic Testing – Time-of-Flight Diffraction Technique as a Method for Detection and Sizing of Discontinuities). Tendo controle sobre as diferentes características do sistema, desde a especificação das suas características ultrassônicas, até a formação das imagens, foi possível conhecer as fontes incertezas envolvidas e estimar a incerteza de medição da técnica.
Synthesis and characterization of mesoporous materials with SBA and MCM structure types
Authors: Sacramento R. A. , Cysneiros O. M. S. , Silva B. J. B. , Silva A. O. S.
Published: November 2019

Abstract Mesoporous materials are promising structures for application in catalysis and adsorption due to high surface area and large pore size. Mesoporous materials were synthesized by the hydrothermal method with novel surfactants, distinct from those observed in the literature, in order to carry out a study of its structure and to obtain materials with better textural properties. The structures synthesized with the surfactants Igepal CO630 and Brij O20 presented the best results of specific surface area, 1074 and 1075 m2.g-1, respectively. The obtained materials were characterized by XRD, TG/DTG, N2 adsorption-desorption, and FTIR techniques. XRD patterns indicated that the highly ordered mesoporous silica structures, such as MCM-41 and MCM-48, using CTMABr as the structure-directing agent and the SBA-15, SBA-16 and other SBA structures using different block copolymers were obtained. Through N2 adsorption-desorption isotherms, it was observed type IV isotherms, attributed to mesoporous materials. The FTIR spectra presented similar behaviors with characteristic vibrational bands of MCM and SBA type materials.
Influência do tipo e teor de pigmento no estado endurecido de ladrilhos hidráulicos
Authors: Zveibil F. N. , Romano R. C. O. , Pileggi R. G.
Published: November 2019

Resumo A aplicação de ladrilhos hidráulicos voltou a ser valorizada nos últimos anos em função de sua beleza e versatilidade. O ganho de resistência sem necessidade de queima é uma considerável vantagem, mas o tempo e o custo de produção e a manutenção em estoque são algumas desvantagexns observadas. Como são materiais que permanecem expostos durante o uso, devem ter propriedades como estabilidade de cor, resistência à abrasão e estanqueidade controladas. O objetivo deste trabalho foi avaliar o impacto do tipo e teor de pigmento (à base de óxido de ferro ou negro de fumo) no estado endurecido dos pisos. As misturas foram realizadas com diferentes teores de pigmento (0,05%, 0,30% e 0,60%) e os resultados avaliados em função da alteração da cor, absorção de água, resistência à abrasão/flexão, módulo elástico e permeabilidade indicaram que não houve um padrão com relação ao pigmento utilizado e cada propriedade foi alterada de forma distinta.
Caracterização e aproveitamento dos resíduos de argila e argilito provenientes da extração de gipsita no município de Araripina-Brasil como matérias-primas para cerâmica vermelha
Authors: Cipriano P. B. , Ferraz A. V.
Published: November 2019

Resumo O objetivo deste trabalho foi a caracterização e o aproveitamento dos resíduos de duas argilas (B e C, coletadas em diferentes camadas do capeamento) e argilito, gerados da extração da gipsita no município de Araripina, para a aplicação em cerâmica vermelha. Foram preparados os corpos de prova cerâmicos utilizando as argilas residuais com a incorporação de 40%, 50% e 80% de argilito, moldados por compressão, secos a 110 °C e sinterizados a 850, 950 e 1050 °C durante 2 h. Em seguida, foram avaliadas a absorção de água, retração linear, perda ao fogo, porosidade aparente, massa específica aparente, resistência à flexão em três pontos e microestrutura da superfície de fratura. O uso das argilas residuais com o teor máximo de 50% de argilito mostrou-se viável em cerâmica vermelha. Os melhores resultados foram obtidos nos corpos cerâmicos com a argila B (contendo montmorilonita) com adição de 40% e 50% de argilito em relação à argila C.
Preparation of low-cost ceramic membranes for microfiltration using sugarcane bagasse ash as a pore-forming agent
Authors: Andrade R. M. , Jaques N. G. , Sousa J. , Dutra R. P. S. , Macedo D. A. , Campos L. F. A.
Published: November 2019

Abstract Ceramic membranes are of great industrial interest in separation processes. They are characterized by high chemical and thermal stabilities and filtration capacity at high temperatures (>500 °C) in a wide range of pH values. However, the major disadvantage of ceramic membranes is the high-cost of production involving synthetic raw materials, usually alumina and zirconia. In this work, low-cost ceramic membranes were prepared by solid-state reactive firing using a mixture of kaolinite clay and sugarcane bagasse ash. Particle size distribution, thermal, mineralogical, and chemical composition analyses were carried out to study the raw materials. Technological properties and water permeability were investigated in samples fired between 800 and 1000 °C. The filtration efficiency was measured by comparative analyses between the raw water and the filtrate. The mean pore size ranging from 2.5 to 6.0 μm makes the sugarcane bagasse ash derived ceramic membranes suitable for microfiltration processes.
Study of obtaining thin films of CeO2 doped with 2 and 4 mol% of europium, terbium and thulium by spin coating: photocatalytic properties
Authors: Dias B. P. , Andrade Neto N. F. , Garcia L. M. P. , Bomio M. R. D. , Motta F. V.
Published: November 2019

Abstract In this study, thin films of Eu3+, Tb3+ and Tm3+ doped CeO2 in the proportions of 2 and 4 mol% were obtained by spin coating and calcined at 700 °C. The films were characterized by XRD, SEM, AFM and UV-vis techniques. The photocatalytic activity of the thin films was measured by the degradation of the methylene blue (MB) dye. The thin films were submitted to 4 photocatalytic cycles to analyze the capacity to be reused. XRD patterns showed no secondary phase formation, where all characteristic peaks were related to CeO2. SEM micrographs indicated that doping at 4 mol% promoted the reduction in the thickness and surface porosity of the thin films. AFM images indicated the increase in surface roughness with rare earths doping. Doping with Eu3+, Tb3+ and Tm3+ increased the degradation of the methylene blue dye by at least 15% for thin films doped at 4 mol%. The reuse tests indicated that the photocatalytic activity remained practically constant even with the application of four consecutive cycles.
Síntese de pigmentos de níquel utilizando areia descartada de fundição como fonte de sílica
Authors: Martin A. C. , Schabbach L. M. , Folgueras M. V.
Published: November 2019

Resumo Sintetizaram-se pigmentos do sistema Zn2-xNixSiO4 variando a proporção molar de zinco e níquel, partindo da estrutura willemita (Zn2SiO4) à olivina (Ni2SiO4), usando areia descartada de fundição (ADF) e sílica comercial como fontes de SiO2. A ADF foi caracterizada por análise química e DRX. A síntese dos pigmentos seguiu rota cerâmica, com x = 0, 0,5, 1, 1,5 e 2,0 mol e calcinação a 1200 °C. Os pigmentos foram caracterizados mediante DRX e medidas colorimétricas. Os resultados mostraram que, apesar da presença de alumina e ferro na ADF, as fases cristalinas e cor dos pigmentos foram similares para ambas as fontes de sílica. Teores menores de níquel favoreceram a formação de willemita e maiores a de olivina. Todos os pigmentos (com e sem ADF) dispersos em dois esmaltes e queimados em forno semi-industrial desenvolveram coloração marrom, indicando instabilidade destes nas matrizes usadas, mas confirmando a viabilidade de substituição da sílica comercial por ADF.
Influence of high-frequency microwave radiation on montmorillonite structure parameters
Authors: Chetverikova A. G. , Filyak M. M. , Kanygina O. N.
Published: November 2019

Abstract Influence of microwave radiation on structure changes of montmorillonite particles was studied on a montmorillonite clay sample. Multi-scale long-range processes were induced in the nature-occurring aluminosilicates by microwave radiation of low and medium power (2.45 Hz, 750 W, 10 min). Powdered samples treated with microwave radiation demonstrated reduction of the relative intensity of diffraction peaks and reduction of interplanar spacing of montmorillonite lattice (d001 * from 1.220 to 0.945 nm, d001 from 0.642 to 0.627 nm, d002 from 0.318 to 0.314 nm and d003 from 0.214 to 0.213 nm). The effect was due to extraction of water molecules contained in three-layer packages. Water extraction occurred stepwise with the temperature rise which pointed on long-range processes with a delayed effect. Heating of powdered samples up to 200 °С resulted in the destruction of half of the montmorillonite lattice volume; at 400 °С about 70% of the lattice was destroyed. Fragments of lattice cells formed agglomerates via two-step mechanism. The degree of agglomeration was proportional to the montmorillonite sample amorphicity.
Assessment of sulfamethoxazole adsorption capacity on Pirangi clay from the State of Sergipe, Brazil, modified by heating and addition of organic cation
Authors: Rezende J. C. T. de , Ramos V. H. S. , Silva A. S. , Santos C. P. , Oliveira H. A. , Jesus E. de
Published: November 2019

Abstract Sulfamethoxazole (SMX) is a widely-used antibiotic in human and veterinary medicine for treating diseases and infections and is often detected in the surface water ecosystem. Thus, this study evaluated the capacity of removing SMX from aqueous systems using Pirangi clay (PIR) from the state of Sergipe (Brazil). Pirangi clay samples were treated at 100, 400 and 600 °C and modified with hexadecyltrimethylammonium (HDTMA) cationic surfactant. The modification process used was based on the layered organization of the mineral clay, allowing the intercalation of cationic surfactant, giving a hydrophobic character to the clay. The Pirangi clay treated at 100 °C and modified with HDTMA (org-PIR-100) showed adsorption capacity of 27.3 mg.g-1 with 90% removal of the SMX in 100 min and pH 6, following the pseudo-second-order model and Langmuir isotherm. Different characterization methods were employed to characterize the clays, such as XRF, FTIR, XRD, thermogravimetric analyzes (TG/DTG) and BET method, confirming that the surfactant molecules were incorporated on the clay surface and that org-PIR-100 showed potential for use in water treatment plant filters.
Preparation and properties of α-tricalcium phosphate microspheres by spray drying
Authors: Renó C. O. , Carrodeguas R. G. , Motisuke M. , Rodríguez M. A.
Published: November 2019

Abstract a-TCP microspheres were obtained by atomizing aqueous slurries containing 50 wt% of low crystallinity α-TCP and 1 wt% of citric acid. Poly(ethylene glycol) and poly(vinyl alcohol) were tested as a binder. The spray drying process yielded to microspheres with mean diameter around 20 μm and sphericity (horizontal and vertical length ratio) closest to one, which is essential to many applications, such as drug delivery and injectability of cements. The addition of binders was necessary to decrease the amount of loose particles and to improve powder flowability but it also caused a reduction in wettability and surface area. Best results were achieved with 3 wt% of PVA, as the microspheres presented the highest specific surface area, wettability, and sphericity. The microspheres prepared in this study may be used as injectable bone cements precursor since their geometry and flowability would favor paste homogeneity and injectability overcoming many drawbacks of today’s injectable bone cements.
Cytotaxonomy of Dipetalogaster maxima Uhler, 1894 (Hemiptera, Reduviidae, Triatominae)
Authors: Borsatto K. C. , Alevi K. C. C. , Oliveira J. , Azeredo-Oliveira M. T. V.
Published: November 2019

Abstract The Triatomini tribe consists of ten genera and is regarded as one of the most important tribes from epidemiological point of view. The genus Dipetalogaster Usinger, 1939 is composed only by the species Dipetalogaster maxima Uhler, 1894. This triatomine is exclusive of the Mexico and is a potential vector for Chagas disease. Besides the epidemiological importance, the insects of the Triatominae subfamily are important biological models for cytogenetic studies. Therefore, in order to contribute to the knowledge on the reproductive biology and assist in citotaxonomy of D. maxima, this study aimed to describe spermatogenesis, as well as confirm the karyotype and heterochromatic patterns of this Mexican triatomine species. The seminiferous tubules were torn, fixed to a cover slip and underwent the cytogenetic technique of Lacto-acetic orcein and C-banding. Through the cytogenetics analysis of testicular material D. maxima it was possible to confirm the karyotype (2n = 22), describe the stages of spermatogenesis and characterize the heterochromatic pattern (restricted to sex chromosome Y) of the species. D. maxima showed the same arrangement of heterochromatin described for Triatoma lecticularia (Stål, 1859) (a species that occur in United States of American and Mexico and is phylogenetically related with D. maxima), highlighting the importance of this analysis as an optimization tool to explore phylogenetic correlations.
The genus Tryblionella W. Smith (Bacillariaceae, Bacillariophyta) in southern Brazil salt marshes
Authors: Bertolli Lucielle Merlym , Talgatti Dávia Marciana , Nascimento Thamires Mariah da Silveira , Torgan Lezilda Carvalho
Published: November 2019

Abstract: Tryblionella is a large epipelic genus, widespread from fresh to marine waters. Most of the studies including the genus are based only in light microscopy. Few recent studies are exclusively dedicated to Tryblionella and the ultrastructure of some species is still little known. In this paper we present eleven species of Tryblionella found in epiphyton and microphytobenthos in Patos Lagoon salt marshes. All the species are described, illustrated in light and scanning electron microscopy and comments about their taxonomy, distribution and ecology are provided. Two taxa are reported for the first time in the State of Rio Grande do Sul and one in Southern Brazil. The number of species registered in this study comprises nearly a half of the number of species registered in the country. The high richness observed may be related to the dynamics of the salt marshes, which provides both the mixing of fresh and marine waters communities and the diversity of microhabitats. The great variability among the species analyzed allowed to extend the general concept of Tryblionella, adding features which were not considered in the previous characterizations of the genus.
Freshwater mollusks from three reservoirs of Piauí, northeastern Brazil
Authors: Silva Edson Lourenço da , Rocha Adriana Josefa da , Leal Manuella Feitosa , Santos Orianna dos , Sousa João Hemerson de , Silva Antônia Rafaela Viana da , Dantas Karina Ketelen Silva , Rulim Erika Maria Matos , Castro Emerson Santos , Pacheco Ana Carolina Landim , Pinheiro Tamaris Gimenez
Published: November 2019

Abstract: The pronounced dry season determines the characteristics of the semiarid region of Brazil. Numerous small reservoirs are built to overcome this condition, accumulating multiple uses and causing important changes in the landscape and the local biota. Considering the limited amount of information about the malacofauna of reservoirs, mainly in the Northeast region of the country, this inventory provides a list of mollusks from three important reservoirs located in the city of São Julião, state of Piauí. The collections were carried out monthly between May/2017 and April/2018, sampling a total of 11,149 mollusks, corresponding to the species Melanoides tuberculata (Müller, 1774) (n = 9,724), Biomphalaria straminea (Dunker, 1848) (n = 1,361) and Pomacea lineata (Spix, 1827) (n = 64). The richness of mollusks from the three reservoirs was low, similar to those described in studies conducted in other regions of Northeast Brazil. There was a significant difference in the abundance of M. tuberculata and B. straminea among the studied reservoirs. These environments are not connected and are installed in urban and rural areas, presenting different ecological conditions. The relationship between the human population and the reservoirs, associated with the lack of sanitation, increases the risks of spreading waterborne diseases besides the development of environmental imbalance by the introduction of exotic species.
Outcomes of segmental femoral artery pseudoaneurysm in patients with Behçet’s disease: a single center’s experience
Authors: Khairy Hussein Mahmoud , Shaker Ahmed Alaa
Published: November 2019

Abstract Background Behçet's disease (BD) is an autoimmune condition that involves multiple systems. The most common arterial manifestation in BD patients is pseudoaneurysm, which has higher frequency than aneurysm formation. Objectives To clarify the importance of profunda femoris artery in BD pseudoaneurysm, and present a new method for identifying healthy segments for anastomosis. Methods Fifteen patients presented at a vascular department with pseudoaneurysms of the common femoral (CFA) and superficial femoral artery (SFA), were diagnosed with BD and underwent surgical intervention at Kasr al Ainy hospitals over 2 years. Results All patients were male. The patients ranged in age from 30 to 40 years (mean, 33.8±2.6 years). Mean duration of the disease was 5±3.4 years. Eight (53.3%) CFA graft interpositions, six (40%) mid SFA graft interpositions, and one (6.66) distal SFA graft interposition were performed. Eight (53.3%) of these operations were performed using Dacron graft and sartorius flap, three (20%) were performed with a polytetrafluoroethylene graft, and four (26.66) with a great saphenous vein graft. Two cases (13.33%) were accidentally discovered while four cases (26.66%) had short distance claudication, four cases (26.66%) had pain at rest, and five cases (33.33%) presented with pulsatile swelling correlated with pseudoaneurysm size (p = 0.005). Patients were followed-up over 1 year for new aneurysms and recurrence. Conclusions Surgical repair with muscle flap coverage, with or without ligation of profunda femoris artery, does not affect prognosis. An alternative method for identifying healthy segments of femoral artery may be frozen section and examination of the artery to decrease the risk of recurrence at the site of anastomosis.
Síndrome da congestão pélvica e embolização de varizes pélvicas
Authors: Corrêa Mateus Picada , Bianchini Larissa , Saleh Jaber Nashat , Noel Rafael Stevan , Bajerski Julio Cesar
Published: November 2019

Resumo A síndrome da congestão pélvica (SCP) é definida como dor pélvica crônica há mais de 6 meses associada a varizes perineais ou vulvares, resultantes do refluxo ou obstrução das veias gonadais, glúteas ou periuterinas. A SCP é responsável por 16-31% dos casos de dor pélvica crônica, sendo diagnosticada sobretudo na terceira e quarta décadas de vida. Nos últimos anos, houve um interesse maior nessa patologia por parte dos cirurgiões vasculares devido à sua associação com insuficiência venosa de membros inferiores. Apesar de prevalente, a SCP ainda é pouco diagnosticada tanto nos consultórios ginecológicos quanto nos de angiologistas. Portanto, neste artigo revisaremos a etiologia e o diagnóstico desta patologia e os resultados dos diversos tipos de tratamentos disponíveis.
RELATIONSHIP BETWEEN INTERNAL MORPHOLOGY AND PHYSIOLOGICAL QUALITY OF Leucaena leucocephala SEEDS USING IMAGE ANALYSIS
Authors: Medeiros André Dantas de , Zavala-León Manuel Jesús , Araújo Joyce de Oliveira , Pereira Márcio Dias , Dias Denise Cunha Fernandes dos Santos , Silva Laércio Junio
Published: November 2019

ABSTRACT The use of new methodological approaches and inclusion of non-destructive evaluations in determining the quality of forest seeds has proven to be of great importance for the development of forest production. The aim of this study was to evaluate the effectiveness of the use of a semi-automated tool for measurement of digital images obtained by the X-ray test in seed lots of Leucaena leucocephala and their relationship to seed physiological quality. Seeds were collected from five mother trees in Viçosa, MG. The study was performed through analysis of radiographic images of the seeds. It was determined the percentage of damaged seeds (predation and fungi) and measured: the area, perimeter, circularity, relative density, and integrated density of the seeds. After the X-ray test, a germination test was performed on the seeds, from which ten variables related to seed physiological quality were extracted, including a vigor index. The use of semi-automated measurement tools associated with the X-ray test was effective for evaluating the internal morphology of Leucaena leucocephala seeds, and the variables determined are related to seed physiological quality.
ANSIEDAD Y VIDA COTIDIANA COMO BLANCOS FARMACOLÓGICOS EN URUGUAY 2013-2015
Authors: Bielli Andrea , Bacci Pilar , Bruno Gabriela , Calisto Nancy , Navarro Santiago
Published: November 2019

RESUMEN El artículo describe y analiza algunos procesos por los que la ansiedad y la vida cotidiana son transformadas en blancos farmacológicos por los profesionales de salud pública en Uruguay. Durante 2013 y 2014 se realizaron entrevistas en profundidad a 10 informantes calificados, 35 profesionales de salud pública (Médicos generales y de familia, psiquiatras, psicólogos), dos grupos de discusión (uno con médicos generales, de familia; otro con psicólogas) y un relevamiento de literatura nacional sobre el tema. Se identificó el cruce de dos concepciones de ansiedad: una perteneciente al campo médico, sustentada en conceptos distantes de la experiencia, y otra perteneciente al campo social, sustentada en la experiencia de los profesionales con sus pacientes. Se concluye que su enlace con las denominadas “hipótesis sociológicas” de la ansiedad posibilita transformar problemas cotidianos y derivados de la situación socioeconómica apremiante que viven los pacientes, en problemas pasibles de tramitación farmacológica mediante benzodiazepinas.
Entomofauna associated with Avena sativa in southern Mato Grosso do Sul, Brazil
Authors: Silva Rafael Azevedo da , Degrande Paulo , Souza Ellen Patricia de , Carducci Carlos Eduardo , Leal Matheus Fuchs , Pereira Matheus Dalla Cort
Published: November 2019

ABSTRACT This study was aimed at examining the composition of insects and fluctuations in their populations in Avena sativa in southern Mato Grosso do Sul. The study was carried out at the experimental farm of the Federal University of Grande Dourados (FAECA) in Dourados, Mato Grosso do Sul, in 2014 and 2015, in an area of three hectares divided into 80 plots of 169 m2 each. The assessments were carried out weekly by sampling the area within a 0.25-m2 metal frame, totaling ten evaluations. Within the frame, ten plants were examined for aphids and all plants were inspected for other insects. Based on the faunistic analysis (abundance, constancy, frequency, and dominance), eight species were observed during the two years of study. The most frequent, abundant, dominant, and recurring species were Rhopalosiphum padi, Spodoptera frugiperda and dipterans of the family Syrphidae (hoverfly). The population of R. padi increased until approximately the 40th day after emergence (DAE), when the highest abundance of hoverflies was also observed. After that, the population of R. padi decreased. The aphid R. padi was the main insect observed in A. sativa during the two years of study but were naturally controlled by hoverflies; therefore, chemical intervention was not needed.
Influence of physiological and health quality on the vigor of cucumber seeds
Authors: Soares Vanessa Nogueira , Villela Francisco Amaral , Radke Aline Klug , Rodrigues Hélen Claudine Saliba , Gonçalves Vanessa Pinto , Meneghello Géri Eduardo
Published: November 2019

ABSTRACT The physiological performance of seeds is related to their physiological quality and seed vigor, while their health quality may interfere with germination and early seedling establishment in the field due to the interaction of microorganisms associated with seeds. The study aimed to evaluate the physiological performance and health quality of cucumber seeds and to verify the relationship between these attributes. The physiological quality of cucumber seeds was evaluated by standard germination tests, first count of germination, controlled deterioration test, electrical conductivity test, seedling emergence, emergence speed index, and traditional accelerated aging and aging modified with saline for 48, 72, and 96 h. The health quality of cucumber seed lots was evaluated by blotter test. Stratification of cucumber seed lots by seedling emergence was similar to seedling emergence by controlled deterioration test, first count of germination, and electrical conductivity results. The cucumber seed lots evaluated showed high germination rates; however, lots 1 and 3 had a better performance in vigor tests than lots 2 and 4. Fungi detected in the blotter test were Alternaria sp., Aspergillus sp., Cladosporium sp., and Penicillium sp. Seed lots 2 and 4 had low vigor evaluated by seedling emergence and controlled deterioration, and showed a higher incidence of Penicillium sp. in the evaluation of health quality of seeds. The incidence of Penicillium sp. may negatively affect the vigor of cucumber seeds evaluated by seedling emergence and by controlled deterioration test.
Survival analyses of Diaphorina citri immatures on young citrus orchard in São Paulo, Brazil
Authors: Paiva Paulo Eduardo Branco , Yamamoto Pedro Takao
Published: November 2019

ABSTRACT The survival of eggs and nymphs of Diaphorina citri Kuwayama (Hemiptera: Liviidae) was estimated on young plants (< 1 year) of Citrus sinensis (cultivar Valencia) grafted on Citrus limonia in 3 seasons (Winter and Spring 2013; and Autumn 2014) in Ribeirão Preto, São Paulo State, Brazil. Young shoots with eggs were selected from natural or artificial infestations. Eggs, small nymphs (1st to 3rd instar), and large nymphs (4th and 5th instar) were counted every 3 days. Shoots with large nymphs were caged until the emergence of the adults. The lowest eggs and nymph survival were observed during Winter (0.0%), and Autumn (0.4%); the highest survival rates were recorded during Spring (12.2%). The biotic factor of mortality identified was the parasitism of large nymphs by Tamarixia radiata Waterston (Hymenoptera: Eulophidae), observed in all seasons. Air temperatures (minimum and maximum), and air relative humidity (minimum) could not explain the immature survival differences between Spring (12.2%) and Autumn (0.4%). Rainfall during Spring (165 mm) was higher than during Autumn (48 mm) and may have favored the survival of D. citri in the Spring. Adverse abiotic factors seem to be more important on immature D. citri survival than the biotic factor (parasitism).
Caracterización del liderazgo femenino en ámbitos militares. Reflexiones a partir de las experiencias de las alféreces en su fase de mando
Authors: Husain-Talero Soraya , Angulo Luis Guillermo Muñoz
Published: November 2019

Resumen El artículo presenta los resultados de una investigación sobre el liderazgo que ejercen las alféreces en la Escuela Militar de Cadetes “General José María Córdova” (Bogotá, Colombia). Se demuestra que cualidades como la inteligencia, el conocimiento y la formación son fundamentales para el reconocimiento de una mujer líder en el ámbito militar, así como la responsabilidad y disciplina. Al analizar los estilos de liderazgo adoptados por las alféreces sobresalió la influencia del contexto militar el cual permea el modelo de liderazgo que ellas ejercen.