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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Inheritance of seed quality traits, seed germination and seed longevity in three doubled haploid populations of oilseed rape

Widiarsih, Sasanti 14 November 2017 (has links)
No description available.
2

Sor??o de petr?leo por fibras vegetais

Ferreira, Tatiana Ribeiro 16 March 2009 (has links)
Made available in DSpace on 2014-12-17T14:57:53Z (GMT). No. of bitstreams: 1 TatianaRF.pdf: 1487701 bytes, checksum: 47d699fbf340cd289779ddf019fff3ee (MD5) Previous issue date: 2009-03-16 / Nowadays, when accidents with oil tanker or shore tanks occur and there is oil spill, some arrangements are made in order to repress and to fix the situation. For the containment, barriers or detours are usually made of synthetic materials such as polyurethane foam. In order to clear water away, techniques like in loco burning, biodegradant agents, dispersant agents and sorbent materials application are used. The most of the sorbent materials are also synthetic and they are used because it is easy to store them and their availability in market. This dissertation introduces the study of vegetable fibers of pineapple leaf fibers (Ananas comosus (L.) Merr.), cotton fibers (Gossypium herbaceum L.), kapok fibers (Ceiba pentandra (L.) Gaertn.), curau? fibers (Ananas erectifolius L.B. Sm.) and sisal fibers (Agave sisalana Perrine) related to their capacity of sorption of oil in case of accidental spill in the ocean. This work evaluates the substitution possibility of synthetic materials by natural biodegradable materials with less cost / Atualmente, quando ocorrem acidentes com navios petroleiros ou com tanques de armazenamento e h? derramamento de petr?leo em ?gua, s?o tomadas algumas provid?ncias no sentido de conter e de remediar o derramamento. Para conter o derramamento, s?o utilizadas barreiras de conten??o ou de desvio que s?o feitas, geralmente, de materiais sint?ticos como espuma de poliuretano. Para retirar o petr?leo da ?gua, s?o utilizadas t?cnicas como queima in loco, agentes biodegradantes, agentes dispersantes e aplica??o de materiais que sorvem o petr?leo. Os materiais que sorvem petr?leo tamb?m s?o, em sua maioria, sint?ticos e s?o muito utilizados pela facilidade de armazenamento e disponibilidade no mercado. Esta disserta??o apresenta o estudo de fibras vegetais de algod?o (Gossypium herbaceum L.), de capoc (Ceiba pentandra (L.) Gaertn.), da folha do abacaxizeiro (Ananas comosus (L.) Merr.), de sisal (Agave sisalana Perrine) e de curau? (Ananas erectifolius L.B. Sm.) quanto ? capacidade de sor??o petr?leo em caso de derramamento acidental em mar. Este trabalho avalia a possibilidade de substituir os materiais sint?ticos utilizados atualmente por materiais naturais, biodegrad?veis e de menor custo

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