|
|
|
|
| |
|
|
| Louveaux, Marion; Rochette, Sebastien; Beauzamy, Lena; Boudaoud, Arezki; Hamant, Olivier. |
| Exogenous mechanical perturbations on living tissues are commonly used to investigate whether cell effectors can respond to mechanical cues. However, in most of these experiments, the applied mechanical stress and/or the biological response are described only qualitatively. We developed a quantitative pipeline based on microindentation and image analysis to investigate the impact of a controlled and prolonged compression on microtubule behaviour in the Arabidopsis shoot apical meristem, using microtubule fluorescent marker lines. We found that a compressive stress, in the order of magnitude of turgor pressure, induced apparent microtubule bundling. Importantly, that response could be reversed several hours after the release of compression. Next, we tested... |
| Tipo: Text |
Palavras-chave: Mechanical stress; Indenter; Microtubules; Compression; Bundling; Arabidopsis thaliana; Technical advance. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00347/45829/45479.tiff |
| |
|
|
| Leme, Maristela Franco Paes; Zylbersztajn, Decio. |
| Transactions among agribusiness agents are not exclusively carried out on the market, being also governed by alternative types of institutional arrangements, some of which determined upon contractual agreement. In the fertilizers sector, the companies intensified the offer of input packages to farmers, more specifically to soybean producers, object of this article. In order to acquire the fertilizers, these producers may choose to use their own financial resources, to obtain resources through financing with third parties, or they may recur to the said packages, which include soybean and financial resources in addition to the fertilizers, referred by the soybean producers to as “exchange”, since they acquire fertilizer paying with soybean for future... |
| Tipo: Journal Article |
Palavras-chave: Institucional arragements; Bundling; Trust; Transation cost; Fertilizers; Uncertain.; Agribusiness; D23 e Q13. |
| Ano: 2008 |
URL: http://purl.umn.edu/61248 |
| |
|
|
| Paes Leme,Maristela Franco; Zylbersztajn,Decio. |
| As transações entre os agentes do agronegócio têm deixado de ocorrer estritamente via mercado, passando a serem regidas por diferentes tipos de arranjos institucionais, caracterizados por contratos. No setor de fertilizantes, as empresas intensificaram a oferta de pacotes de insumos aos produtores agrícolas, mais especificamente aos produtores de soja, que são os focalizados neste artigo. Para adquirir fertilizantes, esses produtores podem optar pelo uso de recursos próprios, obtidos em financiamento com terceiros, ou podem ainda recorrer aos referidos pacotes que incluem além dos fertilizantes, soja e recursos financeiros, e que os produtores de soja chamam de "troca", adquirindo insumos pagando em soja para entrega futura. A motivação do presente... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arranjos institucionais; Bundling; Confiança; Custo de transação; Fertilizantes; Incerteza. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032008000200009 |
| |
|
|
|
