Navegando por Assunto "Mandioca"

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Acesso aberto (Open Access)
Aminas bioativaas, bactéria lática e B-caroteno durante o processamento do tucupi
(Universidade Federal do Pará, 2019-05-15) BRITO, Brenda de Nazaré do Carmo; GLÓRIA, Maria Beatriz Abreu; http://lattes.cnpq.br/6895373188728113; PENA, Rosinelson da Silva; http://lattes.cnpq.br/3452623210043423
The cassava roots can generate the most diverse products, but a sauce of yellow color with flavor and exotic aroma, with countless potential use in the food industry, has gained prominence in the domestic and international market. However, its production follow a popular way, since the technological information on the main stages of production, from the fermentation of the Manipueira to the final product, are still insufficient to produce a product standardized with safety and quality. This broth is the Tucupi, obtained from the fermentation of the Manipueira, is a liquid residue from the production of flour, followed by cooking. In view of the lack of data in the scientific literature about this product, a reserach of tucupis marketed in Belém (PA) was carried out and the results showed that this product is still marketed outside the pattern of identity and quality for the Tucupi. With respect to physicochemical properties, the samples showed that the processing of the product is still variable, especially in the stages of fermentation and cooking, with variations in pH, acidity and contents of total sugar and reducer. The samples showed high levels of total cyanide (8.87- 114.66 mg HCN/L) and free (0.80-38.38 mg HCN/L) and the presence of biogenic amines (tyramine, putrescine, histamine and tryptamine) which may cause food poisoning. The influence of Manipueira fermentation on the profile of carotenoids and bioactive amines were verified during the production of Tucupi. The carotenoids were not influenced by this process, and the bioactive amines identified (Spermidine, putrescine, tyramine and histamine) allowed to affirm that during the fermentative process there should be more effective control of the sanitary hygiene conditions. Based on these results, the molecular identification of the microorganisms responsible for the spontaneous fermentation of Manipueira to obtain the Tucupi. Such knowledge will enable the development of a starter culture suitable for the production of this product with quality and safety. It was highlighted for the lactic bacteria, because these microorganisms predominate during the fermentation of cassava, besides possessing genes to synthesis of biogenic amines. Were identify only two species of lactic bacteria, Lactobacillus plantarum and Lactobacillus fermentum, with predominance of L. fermentum during the whole process was identified, and the bioactive amines identified (putrescine, histamine, spermidine) did not interfere in the activity of these bacteria. The literature evidences a correlation between the identified lactic bacteria and the production of biogenic amines, but it is essential that other genetic researches performed to ratify the capacity of L. Plantarum and L. Fermentum to encode the decarboxylase enzyme in order to produce biogenic amines. Suggested that the research of active yeast in this fermentation process be carried out, because other ways on the tucupi still need to be analyzed in order to have an effective adjust in the production, to produce a safe food.
Acesso aberto (Open Access)
Avaliação dos impactos econômicos e sociais da tecnologia trio da produtividade na cultura da mandioca no município de Moju
(Universidade Federal do Pará, 2013-03-08) SILVA, Daniel da Fonseca; TEIXEIRA, Luiza Carla Girard Mendes; http://lattes.cnpq.br/9773700229115395
This research has been focused to evaluate the economic and social impacts from the technology’s adoption named “Trio da Produtividade” (generated Embrapa Amazônia Oriental) for the cassava crops in the city of Moju/PA. The “Trio da produtividade” is the combination of three components in the system for cassava’s production: (i) selection of manioc stem; (ii) spacing of 1 m x 1 m and (iii) weeding in the first 150 days. This analysis was carried out from the primary data collection, by means of technical panels, producers ́ interviews, advisory officers and municipal and state secretaries ́ of agriculture and the environment, and bibliographical survey. It was found that the “Trio da Produtividade” has brought economic and social impacts positive. The economic impacts was found that: (i) in terms of the root, the “Trio da Produtividade” brought an increase of 7 tons/hectare; (ii) the use of technology provides a net income per hectare of R$ 2,260.00 (61.31 % greater); (iii) about the economic feasibility, the “Trio” proved to be superior in indicators VPL, TIR, rate of return, and suffix of profitability, the production system traditionally used by farmers in the city of Moju. Regarding the social impacts, it was found that the technology showed additional benefits in relation to the traditional system, with positive values of 1.80 . In addition, the effect of the increase of production, that is reflected in higher income generation, food security and employment opportunity to relatives and local workers. The workers ́ participation in trainings on the technology’s application brings a breakthrough in the qualification of the workforce, which allows additional remuneration for the differentiation of them. It was also observed, expectation of improvement management of activity by the producers, because the training for participating and greater dedication to activity.
Acesso aberto (Open Access)
Caracterização de farinhas de tapioca produzidas no estado do Pará
(2013) SILVA, Priscilla Andrade; CUNHA, Roberto Lisboa; LOPES, Alessandra Santos; PENA, Rosinelson da Silva
Tapioca flour is a typical food produced from cassava starch (Manihot esculenta Crantz), widely consumed in the Amazon Region. The aim of this study was to characterize two tapioca flours produced in Pará State, Brazil one in the West Region and other in Bragantina Area. Both tapioca flour presented distinct particle-size distribution and significant difference (P0.05) for majority of the physico-chemical and technological parameters. Flour from West Region presented high moisture (10.7%), this due the greater capacity of water adsorption, attributed at its high specific area (smaller particlesize). The optical microscopy with polarized light and the technologic properties of the products did not showed a standard process for the production of tapioca flour.
Acesso aberto (Open Access)
Efeitos do processamento artesanal de raízes de mandioca (Manihot esculenta Crantz) e plantas de malva (Urena lobata L.) sobre a hidrobiogeoquímica de microbacias do Nordeste do Pará
(Universidade Federal do Pará, 2011) PIRES, Camila da Silva; FIGUEIREDO, Ricardo de Oliveira; http://lattes.cnpq.br/2388049759708934
Cassava and caesar weed are among the mainly products of the familiar agriculture in the Northeast of the Pará State. To treat these products the small farmers used to sink amounts of cassava and caesar weed in small streams (regionally named as "igarapés"), to make peal softer and remove its toxic compounds, in the case of cassava, or to promote defibrating in the case of the caesar weed. The effects of these practices to the stream water quality are poor known. In this context, this study aimed to evaluate the potential impacts of these practices to the fluvial hydrobiogeochemistry in the "igarapés" of these region. We adopted the strategy of collect stream water samples before the washing point of these products, in the washing point, and ten meters after this point. For a clearer understanding of the feasible alterations of the water chemistry due to cassava and caesar weed washing it was conducted besides the field monitoring a controlled input and output discharge tank experiment. In both approaches it was measured in the dissolved material the following hydrobiogeochemical: pH, electric conductivity, dissolved oxygen, calcium, magnesium, potassium, sodium, chloride, sulfate, phosphate, nitrate, ammonium, as well as total nitrogen total and organic and inorganic carbon. Our results point out that these cassava and caesar weed washing processes contribute to alter the fluvial hydrobiogeochemistry of these small streams only locally. However, some of the observed local alterations remained along at least ten meters downstream the products washing points. In the tank experiments the alteration were observed clearer and a cluster analysis confirmed the hypotheses that these rude treatments of the studied agriculture products contributes to change the fluvial hydrogeochemistry of the monitored small streams. The study recommends some precautions regarding to the evaluated products treatments and also the adoption of some parameters measurements to monitor these impacts.
Acesso aberto (Open Access)
Estudo das propriedades físico-químicas e microbiológicas no processamento da farinha de mandioca do grupo d'água
(Universidade Federal do Pará, 2007-06) CHISTÉ, Renan Campos; COHEN, Kelly de Oliveira; MATHIAS, Erla de Assunção; RAMOA JÚNIOR, Afonso Guilherme Araújo
The aim of this work was to define the physical-chemical characterization of the processing stages of cassava flour from the water group and identify microbiological and physical contaminants. The samples were collected in a flour mill located in Castanhal, Pará. The selected points were: peeled and washed cassava after (MD); triturated cassava (MT), pressed cassava (MP); and cassava flour (FM) analysing humidity and acidity at all the points of collection and for the cassava flour, ash, water activity, proteins, fats and starch. The initial humidity of the MD sample was from 59.22 to 62.64%, obtaining the flour humidity from 1.43 to 2.12%. The initial acidity was high (from 4.91 to 5.96 meq NaOH.100 g -1) in the MD, gradually increasing until attaining flour (6.54 to 10.19 meq NaOH.100 g -1), whereby legislation requires 3 meq NaOH.100 g -1. For the starch, the value was from 73.19 to 75.31% according to legislation (minimum 70%). The flour showed an acceptable value for the legislation to Coliformes (<3 NMP.g -1). For the Bacillus cereus, the flour showed a value of <1 x 101 UFC.g -1, allowing for the legislation and absence of Salmonella. The flour showed dirtiness.
Acesso aberto (Open Access)
A farinha d’água de Bragança: sua rota turística e seu processo de patrimonialização
(Universidade Federal do Pará, 2020-09) PICANÇO, Miguel de Nazaré Brito
The objective of this article is to describe and analyze the experiences and practices of Bragança flour producers and other exogenous subjects in the Bragantine context, who have elevated cassava and its flour to the city's food heritage, providing them in spectacular contexts such as: television programs and festivals. Data from this study were collected in field trips from 2017 to 2018, but also results from collections from secondary sources such as newspapers, websites and television and indicate that Bragança's water flour is in a moderate but continuous process of patrimonialization.
Acesso aberto (Open Access)
Genetic parameters and simultaneous selection for root yield, adaptability and stability of cassava genotypes
(Empresa Brasileira de Pesquisa Agropecuária, 2013-12) FARIAS NETO, João Tomé de; CUNHA, Elisa Ferreira Moura; RESENDE, Marcos Deon Vilela de; CELESTINO FILHO, Pedro; AUGUSTO, Sebastião Geraldo
The objective of this work was to estimate genetic parameters and to evaluate simultaneous selection for root yield and for adaptability and stability of cassava genotypes. The effects of genotypes were assumed as fixed and random, and the mixed model methodology (REML/Blup) was used to estimate genetic parameters and the harmonic mean of the relative performance of genotypic values (HMRPGV), for simultaneous selection purposes. Ten genotypes were analyzed in a complete randomized block design, with four replicates. The experiment was carried out in the municipalities of Altamira, Santarém, and Santa Luzia do Pará in the state of Pará, Brazil, in the growing seasons of 2009/2010, 2010/2011, and 2011/2012. Roots were harvested 12 months after planting, in all tested locations. Root yield had low coefficients of genotypic variation (4.25%) and broad-sense heritability of individual plots (0.0424), which resulted in low genetic gain. Due to the low genotypic correlation (0.15), genotype classification as to root yield varied according to the environment. Genotypes CPATU 060, CPATU 229, and CPATU 404 stood out as to their yield, adaptability, and stability.
Acesso aberto (Open Access)
A genomic assisted breeding program for cassava to improve nutritional quality and industrial traits of storage root
(2011-12) CARVALHO, Luiz Joaquim Castelo Branco; VIEIRA, Eduardo Alano; FIALHO, Josefino de Freitas; SOUZA, Claudia Regina Batista de
Cassava is cultivated for two ends proposals: "sweet cassava" as fresh consumes and "industry cassava" as source of starch and farina. Landraces were used to discover "spontaneous mutations" and to develop evolutionary and breeding perspective of gene function. Genomic and Proteomic resources were obtained. Gene expression by RNA blot and Microarray analysis were performed to identify differentially expressed genes. A new sugary cassava was identified to be related to missing expression of BEI and a nonsense mutation in GBSSI gene leading to amylose free starch. A pink phenotype showed no expression of CasLYB gene, and a yellow phenotype a down regulation of CasHYb. Proteomic analysis of carotenoid-protein complex together with gene expression analysis of CAP4 revealed a heteroduplex double strand cDNA associated with high carotenoid content. GBSSI gene sequencing identified 22 haplotypes and large nucleotide diversity. Segregating populations by crossing differential biochemical phenotypes and parents adapted to Cerrado's Region were obtained.
Acesso aberto (Open Access)
A memória da gastronomia e o turismo na Bragança amazônica
(Universidade Federal do Pará, 2018) FERREIRA, Cecília Nascimento; BARBOSA, Helena Doris de Almeida; SILVA, Sandreson Marcelo Pereira da
Acesso aberto (Open Access)
Qualidade da farinha de mandioca do grupo seca
(Universidade Federal do Pará, 2006-12) CHISTÉ, Renan Campos; COHEN, Kelly de Oliveira; MATHIAS, Erla de Assunção; RAMOA JÚNIOR, Afonso Guilherme Araújo
In the north of Brazil, cassava flour is produced in small-scale processing units called ´flour mill houses'. These processing units have difficulty in complying with current legislation due to processing methods and to poor sanitary conditions. The objective of this study is to evaluate the quality standard of cassava flour from the dry group, subgroup "fina", type 1. Ten samples of cassava flour were collected from the main supermarkets and free markets in Belém-PA, and the physical-chemical, microbiological and dirt research analyses were carried out. According to Regulation nº 554 from 08/30/1995 issued by the State Agriculture Secretariat, all cassava flour samples analyzed showed total acidity values above the permitted standard (3 meq NaOH/100 g) and five samples were below the minimum tolerance level required for starch (75%). According to Resolution RDC nº 12 from 01/02/2001 of the National Sanitary Control Agency, all cassava flour samples were under the acceptable standards for microbiological contaminants. According to Resolution CNNPA nº 12 from 1978, eight of the analyzed samples did not comply to the permitted standards because they showed dirt.
Acesso aberto (Open Access)
Qualidade física e sensorial de biscoitos doces com fécula de mandioca
(2010-12) VIEIRA, Jucyanne Carvalho; MONTENEGRO, Flávio Martins; LOPES, Alessandra Santos; PENA, Rosinelson da Silva
This research evaluated the substitution of 5, 10 and 15% of wheat flour for cassava starch in sweet cookies production. Both, flour and starch were submitted to the physicochemical, rheological and differential thermal analysis (DTA). The produced cookies were compared through sensory and microbiological analyses. The DTA result didn´t show any alteration in the starch gelatinization behavior. The result of the sensory acceptance analysis showed that crispness is the unique attribute that presented significant difference, indicating the technical viability of wheat flour substitution for 15% of cassava starch.
Acesso aberto (Open Access)
Studies toward the identification of transcription factors in cassava storage root
(2003-12) SOUZA, Claudia Regina Batista de; ALMEIDA, Elionor Rita Pereira de; CARVALHO, Luiz Joaquim Castelo Branco; GANDER, Eugen Silvano
Transcription factors play important roles in several physiological processes. In recent years many transcription factors have been isolated from plants and they are emerging as powerful tools in the manipulation of plant traits. In this work we initiated studies in order to isolate transcription factors from cassava (Manihot esculenta Crantz), an important tropical and subtropical crop. Our results show three kinds of proteins expressed differentially in cassava storage root and immunologically related to the opaque-2 transcription factor from maize. Southwestern experiments showed two proteins capable of interacting in vitro with the DNA sequence of the be2S1 gene from the Brazil nut tree.
Acesso aberto (Open Access)
Transferência química na cadeia solo-mandioca-cabelo humano na região de Caxiuanã (Estado do Pará) e sua importância ambiental
(Universidade Federal do Pará, 2008-05-02) CARMO, Marciléia Silva; KERN, Dirse Clara; http://lattes.cnpq.br/8351785832221386; COSTA, Marcondes Lima da; http://lattes.cnpq.br/1639498384851302; https://orcid.org/0000-0002-0134-0432
In the area of Caxiuanã, State of Pará, stands out the occurrence of several sites with soils type Amazon Dark Earth (TPA). They are dark soils characterized by the presence of ceramic fragments and high concentrations of Ca, Mg, Mn, P, Zn and C, when compared with other soils of Amazonia. They are fertile soils used for subsistence agriculture, mainly the cassava (Manihot esculenta Crantz). In attempt to know the physical, chemical, mineralogical and fertility characteristics of these soils and the interrelations between these and the adjacent areas (AD), cultivated or not with cassava, as well as the capacity of adsorption of nutrients and possible potentially toxic metals by the cassava and the transfer to the human body using hair analysis (mineralogram) the present work was developed. Aiming these results, sites were selected with TPA with and without cassava roçado (TPA/CR and TPA/SR) and adjacent areas also with or without cassava roçado (AD/CR and AD/SR). Samples of soils and cassava including the roots (tubers), leaves and tucupi were collected in the ranches with AD and without AD. Samples of human hair were collected of the riverine population that consumes the cassava of the studied roçados, here denominated: TPA family, those who live in TPA/CR areas; and AD family, those who live in AD/CR areas. The soil samples were submitted to grain size (humid-via), mineralogical (XRD), and chemical (ICP-MS of major, minor and trace elements) besides the fertility analysis. In the cassava samples (roots and leaves) the macronutrients (P, K, Ca, Mg, S), micronutrients (Fe, Mn, Zn, Co, B, Cu, Mo and Ni), non-nutrients and the toxic elements (Pb, Cd, Ce, Sn, Sc, Cr, Zr, Sr, Ba, Al, Na, Hg, Se and As) were determinate by ICP-MS. In hair samples, the essential (S, Ca, Zn, Mg, Cu, Se, Sr, Mn, B, I, Cr, V, Co and Mo), additional (P, Fe, Na and K) and toxic elements (Pb, Bi, Al, Ba, Hg, Ni, Sn, Sb, As, Cd, Ag, U and Th) were also determinate by ICP-MS, what characterize the mineralogram, and correspond to most of elements analyzed in the soils and cassava. The soils are mainly composed by quartz, kaolinite and hematite + goethite, and accessories as anatase, muscovite / illite and zircon. This way they are constituted mainly by SiO2 and Al2O3, besides Fe2O3, TiO2, K2O and Zr. The tendency to the decrease of Al2O3 and Fe2O3 concentrations and the increase of SiO2 concentrations and lots of ignition from B-horizons to A-horizons is really according to the classic evolution of the soils under tropical climate with tropical forest covering. The studied ADEs present pedologic profile similar to other TPAs with high contents of organic carbon and to other TPAs in A-horizons. The concentrations of total Ca, Mg, Mn, Zn and P are relatively high when compared to the Amazonian soils, one of the great distinctions among TPA soil and the adjacent area, and compared to the TPA soils of Caxiuanã and other areas of Amazonia. However, the available P contents are lower, due to the continuous use of TPA in agriculture of roçado. Therefore, as expected, it is probable that the use of TPA in agriculture of roçado is progressively exhausting the nutrient reserves, but in less intensity than the common soils of Amazonia. The chemical analyses of the cassava show that the macronutrients and micronutrients are mainly concentrated in the leaves, and the concentrations do not depend on the soil in which it was cultivated, TPA or AD. In the root (pellicle, skin and pulp) with lower contents than in the leaves, the analyzed elements are mainly concentrated in the pellicle. The non-nutrient and toxic elements found in the cassava are mainly concentrated in the pellicles, followed by the leaves, skin and pulp. The pulp -the part of the cassava used in the human diet - therefore is impoverished in macro and micronutrients, as well as in non-nutrient and toxic elements. The tucupi - the liquid phase - presents low concentrations of the analyzed elements (nutrients, non-nutrients and toxic), while the solid extract is especially composed by C, K, Mg, P and Ca, besides Na, as oxalates and phosphates. The transfer factor (TF) from the soils to the cassava cultivated in TPA and AD areas was elevated in relation to macronutrients (K, Ca, Mg and P), mainly in the leaves, and medium to micronutrients (Fe, Mn, Zn, Co, Mo and Ni) being higher in the cassava cultivated in AD areas due to the lower content of those elements in AD soils and also to the fact that the cassava absorbs only the substances necessary to the basic physiologic function. This way, it’s evident why TPA, much enriched in nutrients, is more appropriate for the agriculture in continuous cultivation of cassava. The hair mineralogram of the researched families of Caxiuanã shows that the variance of the concentrations of the essential and additional elements is higher in TPA than in AD family, while the average concentrations were similar in the two families. On the other hand, the concentrations of toxic elements are relatively higher in the AD family, mainly Pb and Al. The essential and additional elements contents are below the reference values while the toxic elements Al, Pb, Sb and Ba, are above the range of normal values. The concentrations of the essential and additional elements are cumulative with the age. The concentrations of Fe, Al and Bi are higher in the children, therefore susceptible to toxic elements (Al and Bi). According to the sex, the essential, additional and toxic elements are more concentrate in women. The concentrations of essential and additional elements, mainly Mg, Zn, Ca, Sr, Se, Co and P are lower, and of toxic elements Ni, Pb, Sb and As are higher in smokers. This suggests that the habit of smoking possibly inhibits the absorption of most of the elements essential to the capillary formation. Probably due to the possible coexistence with smokers, high concentrations of Ni, Pb, Sb and As were found in among several children, being considered passive smokers. Among the identified geochemical associations, Hg-Sb-Ag-Zn-Bi-Pb-Se-Cd association reflects the smokers. The obtained data of this work and its discussion show that the TPA soils are in fact fertile and the adjacent areas (AD) are relatively impoverished, and the TPA soils enriched in nutrients allow the continuous cultivation of cassava that absorbs from the soil only the necessary for its physiologic function. The pulp of the cassava leaves - more consumed by the man, impoverished in macro and micronutrients - contributes to the poor diet of the riverine population of Caxiuanã. The chemical composition of the cassava didn't show dependence with the soil type (TPA or AD). The chemical composition of the hair of the population of Caxiuanã that feed on cassava cultivated in TPA and AD areas confirms the poor alimentary diet. The mineralogram also shows that the principal external factor of contamination is the tobacco, and perhaps the kitchen aluminum utensils. So the mineralogram is used as a valuable tool to evaluate environmental impacts related to the human health. Therefore, the problems related to the human health in the area of Caxiuanã are in part due to the poor alimentary diet and the habit of smoking, because the soils don't present evidences of anthropic impacts neither of geogenic anomalies.
Acesso aberto (Open Access)
Uso do óleo de açaí (Euterpe oleracea) e amido de mandioca (Manihot esculenta) na obtenção de produtos bioativos
(Universidade Federal do Pará, 2023-10-30) OLIVEIRA, Sara Caroline Pacheco de; LAGO, Gleice Vasconcelos Pereira do; http://lattes.cnpq.br/7932392876332323; HTTPS://ORCID.ORG/0000-0002-9702-250X; BRASIL, Davi do Socorro Barros; http://lattes.cnpq.br/0931007460545219; https://orcid.org/0000-0002-1461-7306
Cassava is found in abundance in nature, especially in the State of Pará, from them it is possible to extract starch, rich in amylose and amylopectin, components that help in the production of bioplastics. Furthermore, Pará is the largest producer of açaí, a raw material that is also natural and has antioxidant, phenolic and healing compounds. The oil extracted from açaí has the same characteristics found in the pulp, which makes it an excellent agent for incorporation into products added on polymers. The present study reports the characterization of cassava starch and evaluation of the biological characteristics of açaí oil, for the production of an active bioplastic, with the aim of incorporating the benefits found in the oil. To this end, some tests were carried out using plasticizers such as glycerol, ethylene glycol and sorbitol in the composition, to structure the bioplastic, where glycerol proved to be the most viable option. Cassava starch was dried at three temperatures: 45, 60 and 75°C, for the drying curve, and it wasobserved that starch dried at 45°C had better performance, without significant losses in its structure. The analyzes carried out were relevant to detect the potential of açaí oil on incorporating bioplastic. It is known that the characterization of the oil is essential to ensure its quality. Açaí oil was evaluated for 1H NMR, which was essential for quantifying iodine (67.05 I2/g) and saponification (109.06 mg KOH/g) levels. Furthermore, the oil also presented satisfactory results, with emphasis on the following activities: antioxidant (532.56 µM of Trolox/g), anticancer (with reduced metabolic activity and cell viability for the AGP01, SK19 and VERO lines, with IC50 75 .30; 80.15; 73.05 µg/ml, respectively), in addition to the promising result in anti-inflammatory activity that tested target gene TNF-α (tumor necrosis factor alpha) and detected that the samples analyzed with the oil presented anti-inflammatory effect even after 24 hours of exposure, which confirms its bioactivity. This highlights the gigantic potential of using açaí oil for improvement and application in new products, as it has proven to be a strong ally against infectious and cancerous diseases, with cell recovery capacity. Therefore, the oil was incorporated into a polymeric matrix based on cassava starch, which resulted in bioplastic with a thickness (0.157 mm), PVA (19.39 g.mm.KPa-1.d-1.m- 2), transparency (2.60), and one of the highlights was the colorimetric analysis that was able to detect shades of green in the sample, represented by values of -5.75 (a*) and 10.90 (b*), identifying the presence of chlorophyll from açaí oil. In this way, it was possible to note the relevance of using this oil for inclusion in products that bring benefits to the end consumer, in order to take advantage of the chemical and biological properties that this oil has in its composition, as is the case of bioplastic, which contributes to the pharmaceutical sector for presenting bioactivity, in addition to its possible use in the packaging sector and helping to reduce the use of plastics from petroleum, as it is a 100% biodegradable plastic.
Acesso aberto (Open Access)
A utilização da Manihot esculent crantz (mandioca) na indústria de chapas de compensados de madeira e seu impacto econômico e social na construção civil
(Universidade Federal do Pará, 2007) NASCIMENTO, Mônica Sabaa Srur do; AGUIAR, Osmar José Romeiro de; http://lattes.cnpq.br/5816019774493244; FALESI, Lindaura Arouk; MACEDO, Alcebíades Negrão; http://lattes.cnpq.br/8313864897400179
This research had as objective to determine the social and economics advantages for plywood production in the civil construction substituting the flour of wheat for cassava scrap flour in the glue’s manufacturing used in manufacturing of plywood. It’s discuss about the anatomical structure of the wood and its properties, the industrial treatments and processes, the structure and the process of production of plywood beyond the substitution of raw material in the ureia-formoaldeído glue’s manufacturing, so the plywood used in buildings constructions has it’s benefit rise and the cost decreases by this substitution. The analysis show that in composition of raw material had a reduction of 7,3% in the cost of the glue. For the civil construction the plywood with cassava glue used in buildings constructor doesn’t represent a great reduction of costs, because the cost of a plywood in a build construction is only 0,84% to economics. The government created a program to incentive the families do agriculture so supporting the development important industries like civil construction.