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| Registros recuperados: 58 | |
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| RIBEIRO, W. F.; COSTA, D. J. E. da; LOURENO, A. S.; MEDEIROS, E. P. de; SALAZAR-BANDA, G. R.; NASCIMENTO, V. B. do; ARAÚJO, M. C. U.. |
| Ricin, (Ricinus communis agglutinin, RCA) is one of the most poisonous of naturally occurring substances and has great potential for bioterrorism because no antidote exists. Fast detection at low concentrations is a challenge, and vital to the development of proper countermeasures. In this study, a square wave adsorptive stripping voltammetric (SWAdSV) method for determining RCA using a cathodically polarized boron-doped diamond (BDD) electrode is presented. An irreversible electrochemical RCA oxidation peak was identified on the BDD electrode by different voltammetric techniques using both direct and adsorptive stripping modes. An adsorption-controlled (slope log Ip vs log v of 0.80) pHdependent process was observed. For values of 1.0pH 9.0, the numbers... |
| Tipo: Artigo de periódico |
Palavras-chave: Castor; Seed.; Ricinus communis; Boro; Mamona; Semente; Boron; Bioterrorism.. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083413 |
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| BUENO, N.; FIALHO, J. de F.; LEITE, J. A.; TEIXEIRA, W. G.. |
| Analise, realizada em casa de vegetacao, da resposta do cupuacuzeiro ao fornecimento de boro na fase inicial do desenvolvimento, e caracterizacao do quadro sintomatologico de sua deficiencia, em Manaus-AM (Brasil). Foi verificado que, na ausencia de boro, o desenvolvimento da planta foi limitado, a ponto do caule apresentar coloracao ferruginosa uniforme, nao sendo possivel a separacao das folhas em superiores e inferiores. |
| Tipo: Parte de livro |
Palavras-chave: Brasil; Amazonas; Manaus; Dry matter; Production; Boro; Cupuaçu; Matéria Seca; Produção; Theobroma Grandiflorum; Boron. |
| Ano: 1996 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/669874 |
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| FIDELIS, R. R.; ROCHA, R. de O.; VELOSO, D. A.; BORTOLON, L.; SOARES, G. M.; BORTOLON, E. S. O.; TAVARES, T. C. de O.; SOUSA, S. A. de; OLIVEIRA, L. B. de; OLIVEIRA, A. C. F. de; LEAL, T. H. V.; BARBOSA, M. R. de A.; SERAGLIO, N. A.; FERRARI, J. M.. |
| Boron is an indispensable micronutrient for common bean culture, requiring careful studies in relation to the need and time of application since it presents a narrow range between deficiency and toxicity. The objective of this study was to evaluate the effect of boron application at different times in common bean culture. An experiment was carried out in Gurupi-Tocantins, with four replicates in a factorial scheme 7 x 4, with seven cultivars (Aporé, Diplomata, IPR-Corujinha, IPR-Chopim, IPR-Gralha, CNFC 10467 and Sapphire) and four application times (T1- absence of boron application, T2- application of boron at 15 DAE -days after emergence-, T3- application of boron at 25 DAE, T4- Application of boron at 35 DAE). There was a significant interaction between... |
| Tipo: Artigo de periódico |
Palavras-chave: Feijão; Phaseolus Vulgaris; Genótipo; Características Agronômicas; Boro; Boron; Beans; Plant micronutrients; Application timing. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129492 |
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| Espinoza-Navarro,O; Rodríguez,H; Rodríguez,M; Silva,E; Luque,A. |
| The objective of this study was to evaluate the effects of boron (B) using as a biological model Drosophila malanogaster. Analizing specifically the responses over descendency to doses of 6,0 and 12 mg/L, comparing a control group which culture medium was prepared with water with boron concentrations of 0,6 mg/L, according to World Health Organization. The results show a significative alteration in the number of descendency from F1 to F3 and then a tendency to normalization in F4 and F5. Also a significant change in proportions between the males and females, with an acute effect on F1 and then a possible chronic effect from F2 to F5, increasing the proportion of females over males. This differences between genders are significant only until F4, on F5 these... |
| Tipo: Journal article |
Palavras-chave: Reproduction; Boron; Reproductive toxicology; Drosophila melanogaster. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300021 |
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| Fernandes,Mônica D. S. da S.; Morais,Marciana B. de; Mesquita-Oliveira,Francisco F.; Ulisses,Cláudia; Medeiros,José F. de; Albuquerque,Cynthia C. de. |
| ABSTRACT The plant Varronia leucocephala is widely used in Brazil for its therapeutic properties. However, a major problem for the seedlings is the low percentage of root formation. The objective of this study was to establish a rooting protocol for V. leucocephala cuttings, using phytoregulators and microelements associated with arbuscular mycorrhizal fungi. The auxin indole-3-butyric acid (IBA) concentration of 1500 mg L-1 showed the best rooting percentage, and it is proposed associating the microelements zinc and boron with the highest IBA doses. Although an increase in the rooting percentage was observed in the presence of zinc, it was not the most suitable for improving the percentage of propagation. Consequently, association of arbuscular... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Boron; Rooting; Zinc. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300167 |
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| Bustos-Obregón,Eduardo; Olivares,Christopher. |
| It has been reported that boron causes changes in various systems, including the male reproductive system. Residents in some towns in northern Chile were consuming a few years ago in the drinking water 20 times more than the amount established as permissible limit by WHO. This study evaluates the effects in an animal model of high intake of boron on the testis. Boron was administered in the drinking water. Twenty male mice (Mus domesticus), sexually mature, were used, divided into 2 groups: the experimental group was given Boron at a dose of 12 mg/L, and the control group 0.6 mg/L, for 42 days. Sections of testis were obtained for: HE staining (Morphometry and Histopathology), Immunohistochemistry (Cox-2), Mallory and Picrosirious stain (evaluation of... |
| Tipo: Journal article |
Palavras-chave: Boron; Mouse; Testicular structure; Collagen I/III; Infertility. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300057 |
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| Sotomayor,Carlos; Norambuena,Paulina; Ruiz,Rafael. |
| The effect of foliar boron treatments on fruit growth and seed development in Actinidia deliciosa, cv. Hayward, was studied. The distal leaves (BH) or fowers (BF) of a shoot were sprayed with 500 mg L-1 boric acid during the fowering period. The mobility of boron from the leaves to the fowers through the phloem was determined by spraying only the leaves. From 0 to 96 h after treatment, leaves and fowers were sampled and total boron was assessed. At harvest time, fruit weight and diameter plus seed weight and number were measured for the different treatments. The weight of fruits growing from shoots with boron-treated leaves were 14.1% higher than the control, while the weight of fruits derived from boron-treated fowers was 17% higher than that of fruits... |
| Tipo: Journal article |
Palavras-chave: Boric acid; Boron; Fruit weight; Kiwifruit; Seed number; Seed weight. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000100013 |
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| LIBÓRIO, C. B. DE; VERZIGNASSI, J. R.. |
| RESUMO - Objetivou-se a avaliar os efeitos do boro em diferentes doses e épocas de aplicação na BRS RB331 Ipyporã. Foram conduzidos dois ensaios em vasos, a céu aberto, safra 2016/17. Em ambos os ensaios os tratamentos foram representados por quatro doses de boro e duas épocas de aplicação mais um tratamento controle (4x2 +1), delineados em blocos casualizados, em esquema fatorial, com três repetições, e cada parcela representada por um vaso com uma planta. O substrato foi composto por areia:solo (3:1). A adubação foi efetuada de acordo com a necessidade, considerando os tratamentos. Amostras do substrato foram analisadas. Foram avaliados número de perfilhos vegetativos e altura da planta em duas épocas, clorofila e análise foliar antes do início da... |
| Tipo: Artigo de periódico |
Palavras-chave: Boro; Brachiaria Decumbens; Brachiaria Ruziziensis; Produção de Sementes; Boron; Seed yield. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1149716 |
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| Fassani,EJ; Bertechini,AG; Brito,JAG; Kato,RK; Fialho,ET; Geraldo,A. |
| Boron supplementation in broiler feed is not a routine practice. However, some reports suggest a positive effect of boron on performance. This study assessed the effects of boron supplementation on broiler performance. Diets were based on maize and soybean meal, using boric acid P.A. as boron source. Six supplementation levels (0, 30, 60, 90, 120 and 150 ppm) were evaluated using 1,440 one-day old males housed at a density of 30 chickens in each of 48 experimental plots of 3m². A completely randomized block design was used with 8 replicates. Feed intake, weight gain and feed conversion were assessed in the periods from 1 to 7 days, 1 to 21 days and 1 to 42 days of age, and viability was evaluated for the total 42-day rearing period. No performance variable... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal nutrition; Boron; Broiler; Chicken; Performance. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400004 |
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| Domingues,Douglas Silva; Leite,Susi Meire Maximino; Farro,Ana Paula Cazerta; Coscrato,Virgínia Elias; Mori,Edson Seizo; Furtado,Edson Luiz; Wilcken,Carlos Frederico; Velini,Edivaldo Domingues; Guerrini,Iraë Amaral; Maia,Ivan Godoy; Marino,Celso Luis. |
| Boron (B) is a low mobility plant micronutrient whose molecular mechanisms of absorption and translocation are still controversial. Many factors are involved in tolerance to Boron excess or deficiency. Recently, the first protein linked to boron transport in biological systems, BOR1, was characterized in Arabidopsis thaliana. This protein is involved in boron xylem loading and is similar to bicarbonate transporters found in animals. There are indications that BOR1 is a member of a conserved protein family in plants. In this work, FORESTS database was used to identify sequences similar to this protein family, looking for a probable BOR1 homolog in eucalypt. We found five consensus sequences similar to BOR1; three of them were then used in multiple alignment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Boron; Xylem loading; Expressed Sequence Tag (EST); BOR1. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400017 |
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| Chalk, T. B.; Foster, G. L.; Wilson, P. A.. |
| The origin and carbon content of the deep water mass that fills the North Atlantic Basin, either Antarctic Bottom Water (AABW) or North Atlantic Deep Water (NADW) is suggested to influence the partitioning of CO2 between the ocean and atmosphere on glacial-interglacial timescales. Fluctuations in the strength of Atlantic meridional overturning circulation (AMOC) have also been shown to play a key role in global and regional climate change on timescales from annual to millennial. The North Atlantic is an important and well-studied ocean basin but many proxy records tracing ocean circulation in this region over the last glacial cycle are challenging to interpret. Here we present new B/Ca-[CO32-] and boron isotope-pH data from sites spanning the North... |
| Tipo: Text |
Palavras-chave: Boron; Geochemistry; Palaeoceanography; Carbonate system; Glacial; Atlantic. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00496/60812/64631.pdf |
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| FERREIRA, L. V.; COCCO, C.; ALDRIGHI, M.; CARVALHO, S. F. de; PICOLOTTO, L.; MONTE, F.; ANTUNES, L. E. C.; FLORES CANTILLANO, R. F.. |
| A amoreira preta é uma espécie rústica que apesar de ter sido introduzida no Brasil na década de 70, poucos trabalhos de manejo desta rosácea foram realizados. Objetivou se com o presente trabalho avaliar a qualidade de amoras pretas ?Tupy?, utilizando diferentes aplicações de cálcio e boro em pré colheita, visando a manutenção da fruta em pós colheita. Os experimentos foram realizados na Embrapa Clima Temperado, Pelotas/RS e, as análises químicas realizadas em Laboratório de Fisiologia da Pós colheita da mesma instituição, no período de 2011. As aplicações de cálcio (Ca) e Boro (B) nos tratamentos foram realizadas com pulverizador costal, sendo adicionado 2 ml de fertilizante foliar líquido, contendo 19% de Ca e 2% de B e 2ml de espalhante adesivo... |
| Tipo: Artigo de periódico |
Palavras-chave: Tupy; Rubus ssp.; Amora preta; Cálcio; Boro; Pré-colheita; Blackberries; Calcium; Boron; Preharvest treatment. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/962058 |
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| Registros recuperados: 58 | |
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