Consulta: creatorFacets:"Buckeridge,Marcos S."
Registros recuperados: 7
Data/hora: 13/06/2024 02:55:34

Neste fascículo
Provedor de dados: 88
Autores: Buckeridge,Marcos S.; Barros,Fábio de.
Tipo: Info:eu-repo/semantics/other
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000300001

Fructan degradation and hydrolytic activity in tuberous roots of Viguiera discolor Baker (Asteraceae), a herbaceous species from the cerrado
Provedor de dados: 88
Autores: Degasperi,Maria I.; Itaya,Nair M.; Buckeridge,Marcos S.; Figueiredo-Ribeiro,Rita De Cássia L.
Fructans of the inulin type are the major reserve carbohydrates in tuberous roots of Viguiera discolor, a perennial herb native to the cerrado. Changes in molecular mass of the polymer, followed by releasing free fructose suggested that hydrolysis could be related to the sprouting of the buds after the dormant period, when aerial parts of the plant are naturally absent. Excision of aerial parts resulted in the increase of fructan 1-exohydrolase (1-FEH) activity in tuberous roots after sprouting. 1-FEH was partially purified from this material by binding to ConA-Sepharose and the highest activity was detected at pH 5.4 and between 20 and 40 °C. Values of Km for V. discolor inulin could not be determined since no saturation was observed up to 10%. The study...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asteraceae; Cerrado; Fructan 1-exohydrolase; Inulin.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000100003

Sonia Dietrich: a life dedicated to science
Provedor de dados: 88
Autores: Buckeridge,Marcos S.; Braga,Marcia R.
Tipo: Info:eu-repo/semantics/other
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000300001

Editorial
Provedor de dados: 88
Autores: Buckeridge,Marcos S.
Tipo: Info:eu-repo/semantics/other
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000100001

Sistemas complexos: novas formas de ver a Botânica
Provedor de dados: 88
Autores: Souza,Gustavo M.; Buckeridge,Marcos S.
Uma parte da ciência denominada Complexidade vem se desenvolvendo rapidamente durante os últimos 15 anos e as aplicações de tais ferramentas às Ciências Vegetais são iminentes. Na presente revisão, são apresentados conceitos básicos relacionados à Complexidade e dados alguns exemplos de suas aplicações em diferentes áreas da Botânica. O argumento principal deste trabalho é que a melhor compreensão e conseqüente aplicação de tais enfoques à taxonomia, fisiologia, anatomia e ecologia pelos botânicos provavelmente levará a uma ampliação considerável do que se sabe sobre os vegetais.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atrator; Botânica; Complexidade; Fractais; Redes neurais.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000300002

Carbon sequestration in the rain forest: alternatives using environmentally friendly biotechnology
Provedor de dados: 49
Autores: Buckeridge,Marcos S.; Aidar,Marcos P.M.
As carbon dioxide increases on Earth atmosphere, the rise in average temperatures may provoke changes in the environment that could damage civilisation as we know it. As a result, the need to sequester carbon becomes urgent, and one of the options we have is to use the potential of the forests to do it by enhancing assimilation of CO2 through photosynthesis. However, if we consider the use of plants to increase carbon sequestration, a problem that looms is that species often acclimate and actually reduce CO2 assimilation through feedback mechanisms of the sugars that are the product. In the present article, we propose that some biochemical pathways, such as those in control of photosynthesis, carbohydrate metabolism and assimilation, and cellulose and...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Global change; Carbon Sequestration; Photosynthesis; Rain Forest; Sugar Sensing; Cellulose synthesis; Gene therapy.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032002000100002

Cell wall hydrolases in the seeds of Euphorbia heterophylla L. during germination and early seedling development
Provedor de dados: 61
Autores: Suda,Cecilia N. K.; Buckeridge,Marcos S.; Giorgini,Jarbas F.
Activities of cell wall hydrolases of Euphorbia heterophylla L. (wild poinsettia) endosperm were investigated during pre- and post-emergence periods, defined as the time interval before and after 2.2 days from the start of imbibition, respectively. The activities of endo-beta-mannanase and beta-mannosidase are higher over the pre-emergence when compared to the post-emergence period and they may be involved in the process of germination in E. heterophylla. On the other hand, the activities of beta-galactosidase, beta-glucosidase, alpha-xylosidase, beta-xylosidase and glucanases, which hydrolyse CMC, xyloglucans from Hymenaea courbaril or Copaifera langsdorffii, xylan, Avicel and lichenan, are higher over the post-emergence period. Activity on laminarin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cotyledon expansion; Endosperm; Endoglucanase; Endomannanase; Euphorbiaceae; Xylanase.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000300002