Navegando por Assunto "Cassava"

Agora exibindo 1 - 4 de 4

Acesso aberto (Open Access)
Avaliação do processo de produção de etanol pela fermentação do caldo de mandiocaba (Manihot esculenta Crantz)
(Universidade Federal do Pará, 2013-02-28) SOUZA, Leiliane do Socorro Sodré de; FRANÇA, Luiz Ferreira de; http://lattes.cnpq.br/6545345391702172
The physico-chemical characteristics identified at sweet cassava root, was: moistures (%), fiber (%), protein (%), ash (%), total lipids (%), reducing sugars and total reducing sugars (%); the sap extract from sweet cassava root was characterized by pH, soluble solids (%), glucose and titratable acidity. This study used the yeast Saccharomyces cerevisiae PE-2. Was realized 15 tests that followed the conditions determined by the experimental design of Box- Behnken, with 3 independent variables: temperature (oC) (X1), pH (X2) and concentration of inoculum (g/L) (X3). The statistical analysis was performed with p>0,05. Through the analysis of variance (ANOVA) was proposed a second order polynomial model to the alcohol content (ºGl), and by analysis of response surfaces it was determined the optimum condition to the fermentation of sap extract from sweet cassava root without addition of nutrients, on original substrate concentration of it (6,46 g/L): 28ºC (temperature), 4,88 (pH) and 10 g/L (inoculum concentration). Under these conditions a test was conducted, which aimed to raise the curves of cell growth (yeast), CO2 production, consumption of sugars and ethanol production, to better understand the process of fermentation broth of sweet cassava. Through the cellular growth curve was determined the duration of the exponential phase, using the method of linear regression; this step in this study occurred at different time intervals. The value found to μm was 0,05 h-1.
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)
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.