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| Registros recuperados: 473 | |
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| VAZ JUNIOR, S.. |
| A necessidade de desenvolvimento de novas matérias-primas renováveis para a química, em substituição ao petróleo, tem se mostrado como um desafioo estratégico para o século XXI. Neste contexto, o uso dos diferentes tipos de biomassa vegetal - amilácea, lignocelulósica, oleaginosa e sacarídea - pode se consolidar tanto como uma alternativa de uso de matérias-primas mais baratas e menos poluentes, bem como um modelo de agregação de valor econômico às cadeias agroindustriais, como as da soja, cana-de-açúcar, milho, florestas, entre outras. Tais linhas de ação poderão, sobretudo, contribuir para a sustentabilidade dos processos de produção de diferentes tipos de produtos químicos orgânicos, desde detergentes a fármacos, os quais são de largo uso na atualidade.... |
| Tipo: Livro técnico (INFOTECA-E) |
Palavras-chave: Química verde; Agroindústria; Biomassa; Biomass; Green chemistry. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/967574 |
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| TEIXEIRA, L. B.; BASTOS, J. B.; OLIVEIRA, R. F. de. |
| Nos diversos compartimentos do agroecossistema de seringueira com cacaueiro, foram avaliados os estoques de materia organica e a quantificacao da biomassa vegetal. O estudo foi realizado em parcela de consorcio de seringueira com cacaueiro, com quinze anos de idade, instalado no Campo Experimental do Centro de Pesquisa Agroflorestal da Amazonia Oriental-CPATU, localizado no Km 40 da rodovia PA253, em Capitao Poco, PA. A quantificacao das fitomassas de seringueira e de cacaueiro foi realizada em junho de 1991, em cinco plantas de cada cultura do total de 140 plantas de seringueira e 960 plantas de cacaueiro por hectare. Em cada planta foram avaliados ramos, caule, folhas e raizes (pivotante, grossas e finas), estas ate um metro de profundidade no solo. O... |
| Tipo: Séries anteriores (INFOTECA-E) |
Palavras-chave: Consorciacao; Disponibilidade; Liteira; Nordeste; Pará; Brasil; Rubber tree; Cocoa; Organic mater; Disponibility; Litter.; Cacau; Biomassa; Matéria Orgânica; Seringueira.; Amazonia; Biomass; Intercropping.. |
| Ano: 1994 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379038 |
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| Leistritz, F. Larry; Hodur, Nancy M.; Senechal, Donald M.; Stowers, Mark D.; McCalla, Darold; Saffron, Chris M.. |
| Rising prices and uncertain supplies of petroleum, together with environmental concerns regarding fossil fuel combustion, has enhanced interest in biobased products and fuels. The work reported here analyzes the feasibility of a multi-product biorefinery using wheat straw as feedstock that produces ethanol, electricity, and cellulose nanofibers. The nanofibers (nanowhiskers) would be used as reinforcements in a biobased nanocomposite material that could substitute for fiberglass in many applications. The analysis indicates that, at 2005 prices and costs, the biorefinery would be marginally profitable. Anticipated advances in bioprocessing technology would enhance profitability. The facility would also make a substantial contribution to the biorefinery site... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biomass; Biomaterials; Ethanol; Wheat straw; Cellulose nanowhiskers (CNW); Economic development; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/7323 |
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| Caill-milly, Nathalie; Duclercq, Benoit; Morandeau, Gilles. |
| Between 1980 and 1986, some Arcachon oyster farmers took up breeding the Japanese clam on the foreshore (Robert et Deltreil, 1990). This production was short lived. The steep fall in prices due to economic competition from Spain, Portugal, Italy and Tunisia, predator action such as the trigger fish (Popovsky et al., 1999), added to the significant amount of mortality that occurred in the summer and autumn of 1992 that affected two-thirds of the total stock, led to clam farming being abandoned at the end of the 1980s. In the Arcachon basin, the Japanese clam (Ruditapes philippinarum) population, now natural to the area, has found favourable conditions for development and is expanding rapidly there. This species has been supplanting the local species... |
| Tipo: Text |
Palavras-chave: Ruditapes philippinarum; Veneridae; Popluation structure; Biomass; Stock assessment; Arcachon Bassin; Veneridae; Ruditapes Philippinarum; Bivalvia; Mollusca; Structure Population; Biomasse; Abondance; Evaluation Stock. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/2006/rapport-2218.pdf |
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| Gualancañay, E.; Tapia, M.E.; Naranjo, Ch.; Cruz, M.; Villamar, F.. |
| Para el estudio biológico y ambiental de la bahía de Jaramijó en los componentes fitoplancton, zooplancton, microbentos y macrobentos, se analizaron 15 estaciones provenientes de tres niveles entre 10 y 20 metros de profundidad y dividido en tres perfiles paralelos a la costa, durante las estaciones seca y lluviosa del año 2008. El fitoplancton y zooplancton resultaron muy abundantes durante la estaciòn lluviosa y menos abundante en la estación seca del año 2008. Predominaron las especies de diatomeas: Bacteriastrum hyalinum, Leptocylindrus danicus, Rhizósolenia stolterfothii, Chaetoceros affinis y Ch. curvisetus y la presencia de dinoflagelados y cianobacterias fue escasa dinoflagelados. En general las especies halladas son típicas de una mezcla de masas... |
| Tipo: Journal Contribution |
Palavras-chave: Phytoplankton; Zooplankton; Biogeography; Biomass; Marine molluscs. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4212 |
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| Pereira Júnior,Lécio Resende; Andrade,Eunice Maia de; Palácio,Helba Araújo de Queiroz; Raymer,Poliana Costa Lemos; Ribeiro Filho,Jacques Carvalho; Pereira,Francisco Jairo Soares. |
| ABSTRACT The dry forests are the type most widely distributed vegetation in the tropics, and studies aimed at quantifying the carbon stock in these forests are important for it to be quantified their participation as mitigating the effects of climate change. With that in mind, the aim of this research was to quantify the carbon stocks in the woody, herbaceous, litter and root components of a patch of dry tropical forest, with 30 years of regeneration in Iguatu-CE, Brazil. Initially the vegetation was inventoried by means of a floristic and phytosociological survey of the woody component in a 1 ha area which had been under conservation. The biomass was then estimated employing allometric equations, and the stored carbon was quantified. Stocks of carbon in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Semi-arid; Caatinga; Biomass. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100032 |
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| Naik,Poornananda Madhava; Al-Khayri,Jameel Mohammed. |
| ABSTRACT Date palm accumulates a wide range of secondary metabolites high in nutritional and therapeutic value. In the present study, date palm (Phoenix dactylifera L., cv. Shaishi) shoot-tip-induced callus was used to establish cell suspension cultures in Murashige and Skoog (MS) liquid medium containing 1.5 mg L-1 2-isopentenyladenine (2iP) and 10 mg L-1 naphthaleneacetic acid (NAA). To study the growth kinetics, cultures were maintained for 12 weeks during which weekly measurements were carried out to determine the biomass accumulation based on packed cell volume (%), fresh weight and dry weight (g). In addition, weekly determination of polyphenols (catechin, caffeic acid, kaempferol, and apigenin) was carried out using high performance liquid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Growth curve; Packed cell volume.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000500464 |
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| Registros recuperados: 473 | |
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