scholarly journals Elaboração e caracterização físico-química e microbiológica da farinha da palma (Opuntia fícusindica Mill) em diferentes temperaturas

Author(s):  
D. S. Severo ◽  
A. S. Araújo ◽  
J. N. V. Deodato ◽  
C. C. M. Silva ◽  
G. S. Alves

<p>A Palma forrageira (<em>Opuntia fícusindica</em> Mill) é uma cactácea originária do México, porém bastante cultivada na região semiárida do nordeste. Na alimentação humana, geralmente, são usados em preparações culinárias os brotos de palma, os frutos <em>in natura</em> ou processados. Uma das maneiras de diversificar o uso da palma forrageira seriam a secagem e sua transformação em farinhas para incorporação em diversos produtos. Desta forma o objetivo deste trabalho foi avaliar a qualidade físico-química e microbiológica da farinha. As amostras foram coletadas na zona rural e transportadas para o laboratório do Centro Vocacional e Tecnológico /UFCG – Campus Pombal – PB, as mesmas foram desidratadas até a total retirada da umidade em estufa de circulação de ar nas seguintes temperaturas: 70, 80 e 90 °C, posteriormente passaram por um liquidificador industrial, em seguida por um moinho de facas para a obtenção da farinha. Após a obtenção foram realizadas as análises microbiológicas e analises físico-químicas. O emprego na alimentação humana, a palma forrageira é um grande potencial produtivo do Semiárido com alternativas sustentadas de desenvolvimento.</p><p><strong><em>P</em></strong><strong><em>reparation and physical chemistry and microbiological characterization of flour palm ( Opuntia fícusindica Mill ) at different temperatures</em></strong></p><pre><strong>Abstract: </strong>The Spineless cactus ( Opuntia fícusindica Mill ) is a cactaceous originally from Mexico, but rather grown in semi-arid region of the northeast. For human consumption, generally, they are used in culinary preparations the palm shoots, os frutos in natura ou processados. One way to diversify the use of cactus would be drying and processing into meal for incorporation into various products. Thus the aim of this study was to evaluate the physical - chemical and microbiological quality of the flour. The samples were collected in the countryside and transported to the laboratory and Technological Vocational Center / UFCG - Campus Pombal - PB, they have been dewatered to the full withdrawal of moisture in air circulating oven at the following temperatures: 70, 80 and 90 ° C, subsequently passed through an industrial blender, then by a slicer to obtain the flour. After obtaining it was conducted microbiological analyzes and physicochemical analysis. Employment in food , the cactus is a great productive potential with the Semi-Arid alternatives sustained development.</pre>

2021 ◽  
Author(s):  
Noreddine Guermoud ◽  
Noureddine Benderdouche ◽  
Habid Bouzid

Abstract Groundwater availability; quality and quantity are important parameters for human development in terms of drinking, agriculture and industry in semi arid regions. The study of the groundwater quality of Bordjias Plain, located in the semi-arid south-western region of the Mostaganem Plateauin Algeria, is an essential parameter for the good health of the population. Chemical parameters analysis (pH, conductivity, Ca2+, Mg2+, TH, Na+, K+, HCO3−, Cl−, SO42−, NO3− PO43−, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, V) was carried out on water samples in different localities of the plain of Bordjias. Characterization of groundwater samples according to the basic exchange index and hydrochemical parameters results show a mixed chemical composition. Samples were evaluated for various uses (consumption and household use, irrigation and industry) according to WHO standards, sodium adsorption ratio (SAR) and saturation index (SI). The results show that Bordjia plain groundwater is of good quality for domestic use and irrigation but not for industrial uses.


Hydrobiologia ◽  
2021 ◽  
Author(s):  
José Etham de Lucena Barbosa ◽  
Juliana dos Santos Severiano ◽  
Hérika Cavalcante ◽  
Daniely de Lucena-Silva ◽  
Camila Ferreira Mendes ◽  
...  

Minerals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 212
Author(s):  
Noemí Barral ◽  
Raúl Husillos ◽  
Elena Castillo ◽  
Manuel Cánovas ◽  
Elizabeth J. Lam ◽  
...  

This study deals with the potential use of water stored in a lake formed by Reocín’s old zinc mine, which has become the second most important reservoir in Cantabria, with a flow of 1300 L s−1. The methodology used is based on the hydrogeological and hydrochemical characterization of the area studied. A total of 16 piezometers were installed to monitor the amount and quality of water. Results obtained show a pH close to 8 and iron, manganese, zinc, and sulphate concentrations lower than 0.05 mg L−1, 0.05 mg L−1, 1.063 mg L−1, and 1305.5 mg L−1, respectively. The volume of the water stored in the lake amounts to 34 hm3. Measurements show that Fe, Mn, and Zn concentrations are below the limits acceptable for human consumption, according to the Spanish 0.2, 0.05, and 5.0 mg L−1 standards, respectively, while sulphate greatly exceeds the 250 mg L−1 limit accepted by the norm. Therefore, the water could be apt for human consumption after a treatment appropriate for decreasing the sulphate level by, for example, reverse osmosis, distillation, or ion exchange. Although industrial and energy uses are possible, the lake water could be utilized as a geothermal energy source. The management of the hydric resources generated when a mine is closed could improve the economic and environmental conditions of the zone, with all the benefits it brings about, thus allowing for compensating of the pumping cost that environmental protection entails, creating, at the same time, a new business opportunity for the company that owns the mine.


Author(s):  
Emídio Araújo Neto ◽  
Beatriz Alves ◽  
Flávia Gehrke ◽  
Ligia Azzalis ◽  
Virginia Junqueira ◽  
...  

2006 ◽  
Vol 05 (3) ◽  
pp. 8-20
Author(s):  
José Carlos Oliveira SANTOS ◽  
Lionete Dantas NUNES ◽  
Sylvia Berenice NÓBREGA ◽  
Dantas José Pires PUZINSKI ◽  
Antonio Gouveia SOUZA

A thermal analysis has been applied to characterization of food and food products. Taking into account the problems of desertification and agricultural practices able to provide income to the population at the semi-arid region of Northeastern Brazil, this work presents the results of the chemical, thermal and kinetic characterization by thermogravimetry and differential scanning calorimetry of the seed derivatives of favelone (cnidoscolus quercifolius), aiming at the application of these materials as an alternative of food source for animals and for the human population at this brazilian region.


2019 ◽  
Vol 34 (3) ◽  
pp. 350-363
Author(s):  
Anderson Ramos de Oliveira ◽  
Marcos Brandão Braga

VARIEDADES DE CANA-DE-AÇÚCAR SUBMETIDAS A DIFERENTES LÂMINAS DE REPOSIÇÃO HÍDRICA POR GOTEJAMENTO SUBSUPERFICIAL   ANDERSON RAMOS DE OLIVEIRA1, MARCOS BRANDÃO BRAGA2   1 Embrapa Semiárido, Rodovia BR-428, Km 152, Zona Rural, 56302-970, Petrolina, PE, Brasil, [email protected] 2 Embrapa Hortaliças, Rodovia BR-060, Km 09, Fazenda Tamanduá, 70275-970, Brasília, DF, Brasil, [email protected]   RESUMO: A região semiárida brasileira apresenta grande potencial de produção de cana-de-açúcar. Contudo, verifica-se que existem oscilações na produção devido à baixa e irregular disponibilidade hídrica. O objetivo deste estudo foi avaliar o comportamento de variedades de cana-de-açúcar irrigadas por gotejamento subsuperficial submetidas a diferentes lâminas de irrigação. O experimento foi conduzido no Campo Experimental de Bebedouro, na Embrapa Semiárido, em Petrolina, PE. Foram realizadas análises de produtividade e de qualidade tecnológica do caldo. As variedades com maior tolerância ao déficit hídrico foram RB92579 e RB961003, pois alcançam máxima produtividade utilizando-se menor lâmina de reposição hídrica, em torno de 80% da ETc. A qualidade tecnológica do caldo apontou diferenças no °Brix e na porcentagem bruta de açúcares das variedades que reduziram em função do aumento da reposição hídrica. Contudo, estas diferenças não foram limitantes à qualidade tecnológica. Sendo assim, o cultivo das variedades RB92579 e RB961003 sob menor lâmina de reposição hídrica pode ser recomendado, pois as mesmas atingem alta produtividade e mantém a qualidade tecnológica do caldo.   Palavras-chave: biomassa, irrigação, estresse hídrico, regiões semiáridas.   SUGARCANE VARIETIES SUBMITTED TO DIFFERENT WATER REPLENISHMENT DEPTHS BY SUBSURFACE DRIP   ABSTRACT: Brazilian semi-arid region presents great potential for sugarcane production. However, due mainly to low and irregular water availability, there are fluctuations in production. This study proposed to evaluate the performance of sugarcane varieties irrigated by subsurface drip, submitted to different water replenishment depths. The experiment was carried out at Campo Experimental de Bebedouro, belonging to Embrapa Semiárido, Petrolina, PE, Brazil. Productivity and technological quality of sugarcane juice analysis were performed. The varieties with higher tolerance to water deficit were RB92579 and RB961003, which reached maximum productivity using lower water replenishment depths of ETc, around 80%. Technological quality of sugarcane juice showed differences in °Brix and raw sugar percentage of varieties that reduced due to water replacement depths increasing. However, these differences were not limiting to the technological quality of sugarcane juice. In summary, the cultivation of RB961003 and RB92579 cultivars under lower water replenishment depth can be recommended, because they maintain the technological quality of sugarcane juice.   Keywords: biomass, irrigation, water stress, semi-arid regions.


2008 ◽  
Vol 15 (4) ◽  
pp. 414 ◽  
Author(s):  
E. GONZÁLEZ-FANDOS ◽  
A. SIMON JIMENES ◽  
V. TOBAR PARDO

The sensory and microbiological quality of sliced mushrooms (Agaricus bisporus L.) packaged in films of perforated and non-perforated PVC and stored at 3 and 9ºC, was studied. The carbon dioxide and oxygen content inside the packages, colour, weight loss, sensory attributes, mesophiles, Pseudomonas, Enterobacteriaceae, aerobic and anaerobic spore formers were determined. The atmosphere generated with the perforated PVC film was similar to that of air atmosphere at 3 or 9ºC. T.he non-perforated PVC film generated inside the packages CO2 : O2 concentrations of 3.4% : 8.1% at 3ºC and CO2 : O2 concentrations of 4.5% : 0.15% at 9ºC. Browning of mushrooms was lower at 3 than at 9ºC. The quality of sliced mushrooms packaged in perforated PVC and stored at 3ºC was adequate after 9 days. However, at 9ºC, the slice deformation and brown blotches incidence were severe after 9 days. The atmosphere generated with non-perforated PVC inhibited aerobic microorganism growth compared to mushrooms packaged in perforated PVC. At 3ºC, the shelf life of mushrooms packaged in non perforated PVC was around 13 days. However, the extremely low O2 atmospheres generated at 9ºC was accompanied by off-odours and growth of anaerobic spore formers, although the appearance of sliced mushrooms was acceptable.;


2008 ◽  
Vol 23 (1-2) ◽  
pp. 35
Author(s):  
R. N. Águila-Ramírez ◽  
C. J. Hernández-Guerrero ◽  
S. Rodríguez-Astudillo ◽  
R. Guerrero-Caballero

Microbiological quality of Ulva lactuca and Ulva clathrata (Chlorophyta) along the coastline of La Paz, B.C.S., México Total, fecal coliforms and the enterococcus group in Ulva lactuca and U. clathrata were measured in four localities of the coastline of La Paz, B.C.S, Mexico. Levels of fecal coliforms in water were below the standard of the Ecological Criteria of Water Quality (EC-WQ) which indicates a healthy La Paz inlet (below 200 MPN/100ml). Values of fecal coliforms in algae were below the NOM-031-SSA1-1993 levels determined for marine organisms destined for human consumption. These values were high only in few months. No enterococci were detected in the samples.


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