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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.
21

Estudo da composi??o qu?mica da jaca (Artocarpus heterophyllus Lam.) desidratada, in natura e liofilizada

Basso, Adriano Martinez 28 March 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T19:23:34Z No. of bitstreams: 1 AdrianoMartinezBasso_DISSERT.pdf: 3012448 bytes, checksum: 3c69a91b0526381ccdc056272f1dba47 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-05T22:54:43Z (GMT) No. of bitstreams: 1 AdrianoMartinezBasso_DISSERT.pdf: 3012448 bytes, checksum: 3c69a91b0526381ccdc056272f1dba47 (MD5) / Made available in DSpace on 2017-06-05T22:54:44Z (GMT). No. of bitstreams: 1 AdrianoMartinezBasso_DISSERT.pdf: 3012448 bytes, checksum: 3c69a91b0526381ccdc056272f1dba47 (MD5) Previous issue date: 2017-03-28 / Este trabalho teve como objetivos determinar as composi??es fisicoqu?mica e mineral das sementes da jaca mole (JM) e da jaca dura (JD) desidratada, das polpas da JM e da JD desidratada, liofilizada e in natura. Para isto, foram determinados os percentuais de: umidade, cinza, lip?deos, prote?na e carboidrato. Foram analisadas por ICP-OES as concentra??es dos elementos: c?lcio, cobre, ferro, magn?sio, cromo, mangan?s, pot?ssio, s?dio, zinco, n?quel e cobalto. Os resultados mostraram que as sementes da JM e da JD t?m composi??es bromatol?gicas muito pr?ximas: 63% de umidade, 18% de carboidrato, 15% de prote?na e 3% de cinzas. A maior diferen?a foi no teor de lip?deos (0,4% - JM e 0,9% - JD). As composi??es minerais s?o bem distintas. O pot?ssio e o magn?sio s?o os mais abundantes em ambas as variedades (95,8% - JM e 93,2% - JD). As sementes de JD t?m 5,5 vezes mais Na, 24% mais Ca, 3 vezes mais Zn e 2% mais K. As sementes de JM t?m 32% mais Fe, 37% mais Mn e 16% mais Mg. Do ponto de vista fisicoqu?mico, as polpas t?m uma grande distin??o. A polpa da JD tem 9,5 vezes mais lip?deos e o dobro de carboidrato. A polpa da JM tem 10% mais umidade e 14% mais cinza. O teor de prote?na ? muito semelhante. Nas polpas, a composi??o de minerais ? bem diferente, embora o pot?ssio e o magn?sio sejam os elementos majorit?rios nas duas variedades. (96,1% - JM e 92,4% - JD). A polpa de JM tem 33% mais K, 29% mais Mg, 26% mais Mn, 48% mais Na, 16% mais Cu, 24% mais Fe e 5% mais Zn. A polpa da JD tem 45% mais Ca, o que pode explicar sua maior firmeza. A composi??o qu?mica das polpas da JM e da JD in natura s?o muito parecidas em rela??o ?s concentra??es de Fe, Cu, Mn e Mg. A polpa da JD in natura tem 2,6 vezes mais Ca e 27% mais Zn. A variedade mole in natura tem 5% mais K e 25% mais Na. A liofiliza??o preservou mais o teor de carboidratos nas polpas das duas variedades de jaca. Os resultados foram submetidos ao teste t pareado, com 95% de signific?ncia, para inferir sobre a signific?ncia da igualdade ou desigualdade dos par?metros comparados. / This work had as objectives to determine the physicochemical and mineral compositions of the dehydrated seeds of the soft jackfruit (SJ) and of the hard jackfruit (HJ), of the dehydrated, in nature and lyophilized pulps of the SJ and HJ. For this, were determined the percentages of: moisture, ash, lipids, protein and carbohydrate. The concentrations of the elements calcium, copper, iron, magnesium, chromium, manganese, potassium, sodium, zinc, nickel and cobalt were analyzed by ICP-OES. The results showed that the seeds of SJ and of HJ have very close bromatological compositions: 63% moisture, 18% carbohydrate, 15% protein and 3% ash. The major difference was in the lipids contente (0,4% - SJ and 0,9% - HJ). The mineral compositions are quite distinct. Potassium and magnesium are the most abundant in both varieties (96% - SJ and 93% - HJ). The seeds of HJ have 5,5 times more Na, 24% more Ca, 3 times more Zn and 2% more K. The seeds of SJ have 32% more Fe, 37% more Mn and 16% more Mg. From a physicochemical point of view, the pulps have a great distinction. The pulp of HJ has 9,5 times more lipids and twice the carbohydrate. The pulp of SJ has 10% more moisture and 14% more ash. The protein content is very similar. In pulps, the composition of minerals is quite different, although potassium and magnesium are the major elements in the two varieties (96% - SJ and 93% - HJ). The pulp of SJ has 33% more K, 29% more Mg, 26% more Mn, 48% more Na, 16% more Cu, 24% more Fe and 5% more Zn. The pulp of HJ has 45% more Ca, which may explain its greater firmness. The chemical composition of the pulps in nature of SJ and HJ are very similar in relation to the concentrations of Fe, Cu, Mn and Mg. The HJ in nature pulp has 2,6 times more Ca and 27% more Zn. The in nature soft variety has 5% more K and 25% more Na. The freeze-drying preserved the carbohydrate content in the pulps of the two varieties of jackfruit. The SJ lyophilized pulp had the lower metal content than the pulp dehydrated in the oven. The results were submitted to the paired t test, with 95% significance, to infer the significance of the equality or inequality of the parameters compared.
22

Performance of farm trees in farming systems in Mubende district, Uganda

Krombholz, Max Lukas 15 October 2018 (has links)
The research of this thesis will focus on the performance of farm forestry trees in Mubende district, Uganda. In order to this, the research will help to fill the existing knowledge gap on the performance of farm forestry trees of east Africa specially Uganda. The conducted tree species are Markhamia lutea, Ficus natalensis, Mangifera indica, Artocarpus heterophyllus, Anitaris toxicaria, Persea americana, Albizia coriaria and Spathodea campanulata. The selection of the trees was mainly driven through the availability of age information. The trees were measured in height, age, DBH, length of commercial stem, diameter at specific height and visual observations e.g. occurrence and stem quality. To compare the performance of the conducted tree species a regression analysis with eight different functions was carried out for each tree species. The results are reproducible Stand- Height-Curves, height curves, DBH curves and curves for the single tree volume. The decision on the best curve was made on their biological plausibility and their statistical calculations. Additionally, the farmers of the trees were interviewed about their tree species for e.g. purposes of the tree, value of the wood and their own impressions on the growth of the tree species. The recommendation for the best applicable function is the Petterson function for the Stand-Height- Curve and the function of Richards for the height-, DBH- and single tree volume curve. Still these functions shouldn’t be used without comparison to other functions, especially because the used functions were developed for tree stand conditions and not specially for agroforestry conditions were the tree growth is in general higher. Additionally, an upscaling and prediction of the monetary tree values is made on the basis of the single tree volume curves and the interview results. The prediction of the farmers possible income through the cultivation of trees is made for Markhamia lutea, Ficus natalensis, Anitaris toxicaria and Albizia coriaria and assumes that 100 trees are planted on one hectare. Albizia coriaria 3.630 € achieves the highest possible extra income for the farmer followed by Ficus natalensis with 1.300 €, Anitaris toxicaria with 910€ and Markhamia lutea with 880 €. This thesis gives an example on the performance and possible monetary value of tree species in Mubende district, Uganda. Further investigation is needed to fill the knowledge gap in the performance of east African tree species and their values completely. Keywords: performance, tree growth, utilization, Uganda, East-Africa

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