Parametrização do modelo CSM-CERES-Maize para uma cultivar de alta produtividade.

2016

Simulação da produtividade da água para a cultura do milho de sequeiro em municípios de Minas Gerais.

2016

Produtividade da soja em função da correção do solo e sobressemeadura de forrageiras na soja.

2016

Ganhos de produtividade de milho em função de diferentes inoculantes de bactérias diazotróficas do gênero Azospirillum.

2016

Produtividade dos trigos MGS 1-Aliança e BRS 404 em função da disponibilidade de água no solo.

2016

Produtividade de Passiflora alata conduzida em espaldeira e latada.

O presente trabalho teve como objetivo avaliar a produtividade e dados físicos dos frutos de P. alata conduzida em latadas e espaldeira.

O COMPORTAMENTO SEMÂNTICO DO PREFIXO "DES-": QUESTÕES DE POLISSEMIA E PRODUTIVIDADE LEXICAL

Este artigo desenvolve uma discussão acerca da semântica dos itens lexicais. Mais exatamente, o objetivo aqui é apresentar alguns resultados obtidos com o desenvolvimento de pesquisa com base no comportamento semântico do prefixo des-. São observados não apenas os vários sentidos admitidos pelo morfema, mas também a questão da sua produtividade lexical. As análises realizadas tomam por referência teórica tanto autores consagrados no âmbito das gramáticas tradicionais como estudos desenvolvidos pela Linguística Teórica. Fez-se um levantamento dos valores semânticos atribuídos ao prefixo des- a fim de que se possam considerar esses teores e propor uma nova sistematização de possibilidades semânticas para o morfema pesquisado. O material utilizado para as análises foi o jornal Observatório da Imprensa em versão online. Vale lembrar que se consideram, neste estudo, uma discussão sobre os significados da base, o significado que o prefixo des- empresta à base com a qual se coliga e o ambiente de ocorrência da palavra prefixada.

Towards executable specification : combining i* and AgentSpeak(L).

Agent-oriented conceptual modelling (AoCM) approaches in Requirements Engineering (RE) have received considerable attention recently. Semi-formal modeling frameworks such as i* assist analysts in requirements elicitation and reasoning of early-phase RE. AgentSpeak(L) is a widely accepted agent programming language. The Strategic Rationale (SR) model of the i* framework naturally lends itself to AgentSpeak(L) programs. Furthermore, the Strategic Dependency (SD) component of the i* framework prescribes the interaction between the agents in a multi-agent environment. This paper proposes a formal methodology for transforming a SR model to an AgentS- peak(L) agent. The constructed AgentSpeak(L) agents will then form the essential components of a multi-agent system, MAS.

Enhanced human bone marrow stromal cell affinity for modified poly(L-lactide) surfaces by the upregulation of adhesion molecular genes

To enhance and regulate cell affinity for poly (l-lactic acid) (PLLA) based materials, two hydrophilic ligands, poly (ethylene glycol) (PEG) and poly (l-lysine) (PLL), were used to develop triblock copolymers: methoxy-terminated poly (ethylene glycol)-block-poly (l-lactide)-block-poly (l-lysine) (MPEG-b-PLLA-b-PLL) in order to regulate protein absorption and cell adhesion. Bone marrow stromal cells (BMSCs) were cultured on different composition of MPEG-b-PLLA-b-PLL copolymer films to determine the effect of modified polymer surfaces on BMSC attachment. To understand the molecular mechanism governing the initial cell adhesion on difference polymer surfaces, the mRNA expression of 84 human extracellular matrix (ECM) and adhesion molecules was analysed using quantitative reverse transcriptase polymerase chain reaction (qRT-PCR). It was found that down regulation of adhesion molecules was responsible for the impaired BMSC attachment on PLLA surface. MPEG-b-PLLA-b-PLL copolymer films improved significantly the cell adhesion and cytoskeleton expression by upregulation of relevant molecule genes significantly. Six adhesion genes (CDH1, ITGL, NCAM1, SGCE, COL16A1, and LAMA3) were most significantly influenced by the modified PLLA surfaces. In summary, polymer surfaces altered adhesion molecule gene expression of BMSCs, which consequently regulated cell initial attachment on modified PLLA surfaces.

Synthesis of 4-arm star poly(L-Lactide) oligomers using an in situ-generated calcium-based initiator

Using an in situ-generated calcium-based initiating species derived from pentaerythritol, the bulk synthesis of well-defined 4-arm star poly(L-lactide) oligomers has been studied in detail. The substitution of the traditional initiator, stannous octoate with calcium hydride allowed the synthesis of oligomers that had both low PDIs and a comparable number of polymeric arms (3.7 – 3.9) to oligomers of similar molecular weight. Investigations into the degree of control observed during the course of the polymerization found that the insolubility of pentaerythritol in molten L-lactide resulted in an uncontrolled polymerization only when the feed mole ratio of L-lactide to pentaerythritol was 13. At feed ratios of 40 and greater, a pseudo-living polymerization was observed. As part of this study, in situ FT-Raman spectroscopy was demonstrated to be a suitable method to monitor the kinetics of the ring-opening polymerization (ROP) of lactide. The advantages of using this technique rather than FT-IR-ATR and 1H NMR for monitoring L-lactide consumption during polymerization are discussed.