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Characterization of acai seeds as a feedstock for electricity generation via gasification; Caracterizacao do caroco de acai como insumo para geracao de eletricidade via gaseificacao  

Energy Technology Data Exchange (ETDEWEB)

This work presents an overview of the characterization physical-chemistry and energy of the aca pit used as input in process of generation of electricity through gasification. Acai pits analyses were accomplished with relationship to the acai pit drying, energy content, proximate and ultimate analyses, size, TGA experiments, bulk density. It was observed that the acai pit can be used as bioenergy but, it presents a low energy content (16,36 MJ/kg) in relationship that of the ' typical' biomass (21 MJ/kg ) and this is not due to the ash content that is very low (1,15%), but yes, the only composition that resembles each other more the Carbohydrates than to the typical composition of the usual biomass. The average diameter of 10 pits chosen at random was 9.5 mm. The acai pits have an angle of repose of {approx}20 degrees, making them ideal for feeding into gasification and combustion ...

2008-07-01

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Rapid Modulation of Spinach Leaf Nitrate Reductase by Photosynthesis 1  

UK PubMed Central (United Kingdom)

Assimilatory nitrate reductase activity (NRA) in crude spinach leaf (Spinacia oleracea) extracts undergoes rapid changes following fluctuations in photosynthesis brought about by changes...Full Text Available

1991-06-01

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Rapid Correlation between the Leaves of Spinach and the Photocontrol of a Peroxidase Activity 1  

UK PubMed Central (United Kingdom)

The activity of a basic peroxidase extracted at high pH from spinach (Spinacia oleracea) leaves is modified by an irradiation with 2-minute red light or 2-minute far red light. This...Full Text Available

1982-02-01

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Enzymic Capacities of Purified Cauliflower Bud Plastids for Lipid Synthesis and Carbohydrate Metabolism 1  

UK PubMed Central (United Kingdom)

Isolated cauliflower (Brassica oleracea) bud plastids, purified by isopycnic centrifugation in density gradients of Percoll, were found to be highly intact, to be practically devoid...Full Text Available

1985-10-01

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Cytosolic Phosphofructokinase from Spinach Leaves 1  

UK PubMed Central (United Kingdom)

Cytosolic ATP-phosphofructokinase (PFK) from spinach leaves (Spinacia oleracea L.) was inhibited by submillimolar concentrations of free Mg2+. The free Mg2+ concentration...Full Text Available

1989-08-01

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Effect of postharvest water deficit stress on gene expression in heads of broccoli (Brassica oleracea var. italica)  

British Library Electronic Table of Contents (United Kingdom)

Harvested plant organs such as heads of broccoli (Brassica oleracea L. var. italica) experience a range of stresses that can lead to premature reduction in quality and eventual senescence. Understanding plant responses to stress may open up novel opportunities to extend postharvest life. One of the first stresses experienced by harvested organs is likely to be water deficit stress since severance of the vascular system halts the normal flux of water into the tissue. For broccoli branchlets with their cut ends held in water, transcriptome analysis based on hybridization of broccoli floret mRNA to a heterologous Arabidopsis microarray revealed that the transcript abundance of 431 genes reliably changed within 48h of harvest. Of these, transcripts of 146 genes increased and 34 genes decreased...

2011-01-01

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Three Homologous Genes Encoding sn-Glycerol-3-Phosphate Acyltransferase 4 Exhibit Different Expression Patterns and Functional Divergence in Brassica napus1[C][W][OA]  

UK PubMed Central (United Kingdom)

Brassica napus is an allotetraploid (AACC) formed from the fusion of two diploid progenitors, Brassica rapa (AA) and Brassica oleracea...Full Text Available

2011-02-01

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Comparative biochemistry of betaine biosynthesis and accumulation in diverse dicot families  

Energy Technology Data Exchange (ETDEWEB)

Salt stress elicits betaine accumulation to high levels in species from several diverse dicot families (Chenopodiaceae, Amaranthaceae, Convolvulaceae, Solanaceae, and Asteraceae). FAM-MS studies with deuterated precursors showed that species from all these families synthesize betaine from choline. Enzyme assays and immunotitration data showed that all accumulating species contained betaine aldehyde dehydrogenase (BADH) enzyme activity recognized by antibodies raised against purified BADH isolated from Spinacia oleracea. Immunoblotting indicated that the BADH monomer was in all cases of Mr {approx} 63,000. The similarity of BADH in the different species is consistent with a single evolutionary origin for the betaine pathway. This was supported by the presence in immunoblots of a cross-reacting band at Mr {approx} 63,000 in Magnolia x Soulangiana, a primitive angiosperm.

1989-04-01

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Projected change in climate thresholds in the Northeastern U.S.: implications for crops, pests, livestock, and farmers  

Energy Technology Data Exchange (ETDEWEB)

Most prior climate change assessments for U.S. agriculture have focused on major world food crops such as wheat and maize. While useful from a national and global perspective, these results are not particularly relevant to the Northeastern U.S. agriculture economy, which is dominated by dairy milk production, and high-value horticultural crops such as apples (Malus domestica), grapes (vitis vinifera), sweet corn (Zea mays var. rugosa), cabbage (Brassica oleracea var. capitata), and maple syrup (sugar maple, Acer saccharum). We used statistically downscaled climate projections generated by the HadCM3 atmosphere-ocean general circulation model, run with Intergovernmental Panel on Climate Change future emissions scenarios Alfi (higher) and B1 (lower), to evaluate several climate thresholds of direct relevance to agriculture in the region. A longer (frostfree) growing season could create new opportunities for farmers with enough capital to take risks on new crops ...

2008-07-01