Página 2 dos resultados de 1211 itens digitais encontrados em 0.004 segundos

Thermal inactivation of polyphenoloxidase and peroxidase in green coconut (Cocos nucifera) water

MURASAKI-ALIBERTI, Nathalia da C.; SILVA, Rodrigo M. S. da; GUT, Jorge A. W.; TADINI, Carmen C.
Fonte: WILEY-BLACKWELL PUBLISHING, INC Publicador: WILEY-BLACKWELL PUBLISHING, INC
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.23%
P>Coconut water is an isotonic beverage naturally obtained from the green coconut. After extracted and exposed to air, it is rapidly degraded by enzymes peroxidase (POD) and polyphenoloxidase (PPO). To study the effect of thermal processing on coconut water enzymatic activity, batch process was conducted at three different temperatures, and at eight holding times. The residual activity values suggest the presence of two isoenzymes with different thermal resistances, at least, and a two-component first-order model was considered to model the enzymatic inactivation parameters. The decimal reduction time at 86.9 degrees C (D(86.9 degrees C)) determined were 6.0 s and 11.3 min for PPO heat labile and heat resistant fractions, respectively, with average z-value = 5.6 degrees C (temperature difference required for tenfold change in D). For POD, D(86.9 degrees C) = 8.6 s (z = 3.4 degrees C) for the heat labile fraction was obtained and D(86.9 degrees C) = 26.3 min (z = 6.7 degrees C) for the heat resistant one.; FAPESP (The State of Sao Paulo Research Foundation); CAPES (Brazilian Committee for Postgraduate Courses in Higher Education)

Exploration of the acarine fauna on coconut palm in Brazil with emphasis on Aceria guerreronis (Acari : Eriophyidae) and its natural enemies

LAWSON-BALAGBO, L. M.; GONDIM JR., M. G. C.; MORAES, G. J. de; HANNA, R.; SCHAUSBERGER, P.
Fonte: CAMBRIDGE UNIV PRESS Publicador: CAMBRIDGE UNIV PRESS
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.3%
Coconut is an important crop in tropical and subtropical regions. Among the mites that infest coconut palms, Aceria guerreronis Keifer is economically the most important. We conducted surveys throughout the coconut growing areas of Brazil. Samples were taken from attached coconuts, leaflets, fallen coconuts and inflorescences of coconut palms in 112 localities aiming to determine the Occurrence and the distribution of phytophagous mites, particularly A. guerreronis, and associated natural enemies. Aceria guerreronis was the most abundant phytophagous mite followed by Steneotarsonemus concavuscutum Lofego & Gondim Jr. and Steneotarsonemus furcatus De Leon (Tarsonemidae). Infestation by A. guerreronis was recorded in 87% of the visited localities. About 81% of all predatory mites belonged to the family Phytoseiidae, mainly represented by Neoseiulus paspalivorus De Leon, Neoseiulus baraki Athias-Henriot and Amblyseius largoensis Muma; 12% were Ascidae, mainly Proctolaelaps bickleyi Bram, Proctolaelaps sp nov and Lasioseius subterraneus Chant. Neoseiulus paspalivorus and N. baraki were the most abundant predators on attached coconuts. Ascidae were predominant on fallen coconuts, while A. largoensis was predominant on leaflets; no mites were found on branches of inflorescences. Leaflets harboured higher mite diversity than the attached coconuts. Mite diversity was the highest in the state Para and on palms surrounded by seasonal forests and Amazonian rain-forests. Neoseiulus paspalivorus...

Probiotic potential and sensory properties of coconut flan supplemented with Lactobacillus paracasei and Bifidobacterium lactis

CORREA, Sabrina B. M.; CASTRO, Inar A.; SAAD, Susana M. I.
Fonte: WILEY-BLACKWELL Publicador: WILEY-BLACKWELL
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.3%
The effect of probiotic cultures on sensory performance of coconut flan during storage at 5 degrees C and the viability of these micro organisms for up to 28 days were investigated. Sensory analyses of the product were performed after 7, 14 and 21 days of storage. Coconut flans were produced with no addition of cultures (T1, control), or supplemented with Bifidobacterium lactis (T2), Lactobacillus paracasei (T3) and B. lactis + L. paracasei (T4). Populations of L. paracasei and B. lactis as single or in co-culture remained above 7 log CFU g(-1) during the entire storage period. Viability of L. paracasei was higher for T3. All products were well accepted and no significant differences (P > 0.05) were detected between the coconut flans studied. The addition of L. paracasei and B. lactis to coconut flan resulted in its having great potential as a functional food, which has high sensory acceptability.

Use of Metals and Anion Species with Chemometrics Tools for Classification of Unprocessed and Processed Coconut Waters

NAOZUKA, Juliana; VEIGA, Marcia A. M. S. da; RICHTER, Eduardo M.; PAIXAO, Thiago R. L. C.; ANGNES, Lucio; OLIVEIRA, Pedro V.
Fonte: SPRINGER Publicador: SPRINGER
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.3%
Coconut water is a natural isotonic, nutritive, and low-caloric drink. Preservation process is necessary to increase its shelf life outside the fruit and to improve commercialization. However, the influence of the conservation processes, antioxidant addition, maturation time, and soil where coconut is cultivated on the chemical composition of coconut water has had few arguments and studies. For these reasons, an evaluation of coconut waters (unprocessed and processed) was carried out using Ca, Cu, Fe, K, Mg, Mn, Na, Zn, chloride, sulfate, phosphate, malate, and ascorbate concentrations and chemometric tools. The quantitative determinations were performed by electrothermal atomic absorption spectrometry, inductively coupled plasma optical emission spectrometry, and capillary electrophoresis. The results showed that Ca, K, and Zn concentrations did not present significant alterations between the samples. The ranges of Cu, Fe, Mg, Mn, PO (4) (3-) , and SO (4) (2-) concentrations were as follows: Cu (3.1-120 A mu g L(-1)), Fe (60-330 A mu g L(-1)), Mg (48-123 mg L(-1)), Mn (0.4-4.0 mg L(-1)), PO (4) (3-) (55-212 mg L(-1)), and SO (4) (2-) (19-136 mg L(-1)). The principal component analysis (PCA) and hierarchical cluster analysis (HCA) were applied to differentiate unprocessed and processed samples. Multivariated analysis (PCA and HCA) were compared through one-way analysis of variance with Tukey-Kramer multiple comparisons test...

Efeito do processo de homogeneização a ultra alta pressão na redução da carga microbiana e da atividade enzimatica da agua de coco.; Effect of ultra high pressure homogenization process on the microbial and enzymatic activities of coconut water.

Gustavo Levy Dosualdo
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 28/02/2007 PT
Relevância na Pesquisa
37.3%
Diferentes tratamentos não térmicos têm sido estudados nos últimos anos como métodos substitutos ou complementares dos tradicionais tratamentos térmicos na conservação de alimentos. Estes tratamentos apresentam a vantagem de não causar alterações indesejáveis no sabor dos produtos ou perdas de nutrientes. Dentre os tratamentos não térmicos, um dos mais estudados é o processamento a alta pressão, que pode ser aplicado através de dois métodos: o isostático e o de homogeneização. O método isostático têm sido estudado com maior freqüência, no entanto, o método de homogeneização apresenta a vantagem de proporcionar uma produção contínua. Este trabalho visou avaliar o tratamento de homogeneização de alta pressão aplicado à água de coco para eliminação da atividade enzimática e de possíveis contaminações microbiológicas do produto. Os processamentos de Homogeneização a Ultra Alta Pressão (HUAP) foram realizados no equipamento nG7400H:320, fabricado pela Stansted Fluid Power (Stansted, Inglaterra), que atinge pressões de até 320 MPa. Estudou-se a influência da pressão de processo e do pH do produto nas atividades enzimáticas de peroxidase e polifenoloxidase e na destruição da bactéria Lactobacillus fructivorans e da levedura Saccaromyces cerevisiae. Os tratamentos realizados não causaram inativação satisfatória das enzimas presentes na água de coco...

Produção de agua de coco (cocus nucifera) utilizando membranas de micro e ultrafiltração de celulose, PES e PVDF; Coconut water processing using micro and ultrafiltration membranes of cellulose, PES and PVDF

Isabel Cristina do Nascimento Debien
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 15/03/2010 PT
Relevância na Pesquisa
37.3%
A água de coco é uma bebida natural, cujo consumo na forma in natura como na processada vem crescendo nos últimos tempos devido aos seus benefícios à saúde. Os métodos de processamento empregados visam, essencialmente, inibir a ação de enzimas (polifenoloxidase e peroxidase) responsáveis pela mudança de cor da água de coco, tornando-a rosa, e garantir sua estabilidade microbiológica após a abertura do fruto, procurando manter o quanto possível suas características sensoriais originais. Os processos de separação com membranas, como por exemplo a micro e a ultrafiltração, destacam-se como uma alternativa aos processos convencionais de tratamento térmico, pois a membrana age como uma barreira permeável seletiva para separar um ou mais solutos de um fluido. No presente trabalho, o objetivo geral foi avaliar o desempenho de cinco membranas de micro (MF) e ultrafiltração (UF) quanto ao fluxo de permeado e a retenção enzimática da água de coco verde, em unidade de laboratório e piloto, e também determinar as características físico-químicas da alimentação, retentado e permeado para os ensaios em unidade de laboratório. Foram utilizadas membranas de MF de polietersulfona de 150 kDa (PES 150) e polifluoreto de vinilideno de 150 kDa (PVDF 150)...

Cu, Fe, Mn and Zn distribution in protein fractions of Brazil-nut, cupuassu seed and coconut pulp by solid-liquid extraction and electrothermal atomic absorption spectrometry

Naozuka,Juliana; Oliveira,Pedro V.
Fonte: Sociedade Brasileira de Química Publicador: Sociedade Brasileira de Química
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2007 EN
Relevância na Pesquisa
37.3%
In this work Cu, Fe, Mn and Zn were determined in extracts of Brazil-nut (Bertholletia excelsa), cupuassu (Theobroma grandiflorum) seeds and coconut (Cocos nucifera) pulp, using solid-liquid extraction and electrothermal atomic absorption spectrometry. Different extractant solutions (mixture of methanol and chloroform 1:2 v/v, water, 0.5 mol L-1 NaCl, 70% v/v ethanol, and 0.5 mol L-1 NaOH) were used for extracting lipids, albumins, globulins, prolamins and glutelins, respectively. The protein concentrations determined in Brazil-nut are higher than those observed for cupuassu and coconut pulp. The analysis of lipid fractions reveals high concentations of Fe in Brazil-nut and cupuassu seed and Zn in coconut pulp. For Brazil-nut, these elements are mainly associated to albumin, globulin and glutelin fractions. The same behaviour was not observed for cupuassu seed and coconut pulp. The element concentrations changed in each protein fraction. In general, high concentrations of proteins were determined in NaOH extractants. On the other hand, low concentration of Cu, Fe, Mn and Zn were found in this fraction.

Optimizing the use of potassium sorbate and sodium metabisulphite for the chemical and microbial stability of carbonated coconut water

Pereira,Eliene Penha Rodrigues; Faria,José de Assis Fonseca; Pinto,Uelinton Manoel
Fonte: Instituto de Tecnologia de Alimentos - ITAL Publicador: Instituto de Tecnologia de Alimentos - ITAL
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2013 EN
Relevância na Pesquisa
37.3%
Coconut water is popular worldwide, mainly because of its pleasant sensory characteristics, nutritional value and low calorie density. However, coconut water is a highly perishable product due to the presence of enzymes such as peroxidase and polyphenoloxidase, which cause undesirable changes in colour, and also because of its susceptibility to microbial spoilage. The use of chemical additives has been adopted by the industry with the intent of increasing product shelf life. In this study, the efficiency of the preservatives potassium sorbate and sodium metabisulphite was assessed using a Central Composite Rotational Design (CCRD) to determine the stability of carbonated coconut water, varying the concentrations of potassium sorbate from 0 to 500 mg.L-1, and of sodium metabisulphite from 0 to 100 mg.L-1. The chemical evaluations included carbonation volume, pH, soluble solids, dissolved oxygen and carbon dioxide, acidity, ascorbic acid, polyphenoloxidase and peroxidase activities, colour and turbidity attributes. The microbiological evaluations considered the total aerobic plate count and the enumeration of yeasts and moulds. It was observed that concentrations of 375 mg.L-1 of potassium sorbate and 75 mg.L-1 of sodium metabisulphite gave the best quality attributes with respect to minor changes in acidity and colour of the coconut water...

Genetic variability among isolates of Coconut lethal yellowing phytoplasmas determined by Heteroduplex Mobility Assay (HMA)

Marinho,Vera Lucia A.; Fabre,Sandrine; Dollet,Michel
Fonte: Sociedade Brasileira de Fitopatologia Publicador: Sociedade Brasileira de Fitopatologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2008 EN
Relevância na Pesquisa
37.36%
Heteroduplex mobility assay (HMA) was used to determine genomic diversity among African isolates of coconut lethal yellowing phytoplasmas causing Cape St. Paul wilt disease (CSPD, Ghana), lethal disease (LD, Tanzania), and lethal yellowing (LYM, Mozambique). They were also compared to the Caribbean phytoplasma associated with coconut lethal yellowing (LY). A DNA fragment of 1850 bp covering the 16S rRNA gene and 16/23S intergenic spacer region of each isolate was amplified with primers P1 and P7 and subsequently submitted to HMA analysis for sequence variation. A PCR product amplified from GH5D (CSPD isolate) as a reference was combined with each PCR product and electrophoresed on polyacrylamide gels. Three groups of phytoplasmas associated with various coconut lethal yellowing diseases were identified by HMA. The samples from Mozambique (LYM) and Ghana (CSPD) formed one group, which was different from the second group, LD from Tanzania. These two groups were different from the third group of Caribbean isolates. This grouping was consistent with the genetic diversity described in the coconut yellowing-associated phytoplasmas detected after cloning, sequencing, and phylogenetic analyses. The HMA technique described here has the potential to provide a simple and rapid means to identify and to establish the diversity of isolates within the coconut lethal yellowing disease group.

Analise SWOT do gerenciamento de resíduos do coco verde em duas agroindústrias do estado do Rio Grande do Norte; Swot analysis of waste management of green coconut agro in two of the state of Rio Grande do Norte

Araujo, Anna Cristina de
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Engenharia de Produção; Estratégia; Qualidade; Gestão Ambiental; Gestão da Produção e Operações Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Engenharia de Produção; Estratégia; Qualidade; Gestão Ambiental; Gestão da Produção e Operações
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
37.36%
In the current conjuncture, the environmental factor has been changing the position of companies that are practicing or minimally adopting environmental management. Such tool has been used by companies to face the problems caused by solid waste, in particular green coconut waste, which is constantly among the material discarded by society (companies/ consumer). It is a typical tropical fruit whose fresh water is very benefic for human health, and its popularization has caused a progressive increase of its consumption. Following this stream of thought, this present work came up with an analysis of strengths, weaknesses, threats, and opportunities SWOT analysis on green coconut solid waste management at two agribusiness companies in the state of Rio Grande do Norte (RN), Brazil, aiming to know the challenges and the potentials of this kind of waste. According to the approach of the problem, this work fits a descriptive, exploratory, and qualitative research. The data collection was obtained by a questionnaire and a structured interview, in order to evaluate the strategic posture of agribusiness companies through SWOT analysis, which is an English acronym for Strengths, Weaknesses, Opportunities and Threats. The SWOT analysis is an effective tool to analyze the internal and external environment of an organization. This tool contributes to locate the company at the environment in question and when well applied it enables the detection of mistakes...

Molecular evidence for a persistent-circulative association between Coconut foliar decay virus and its vector Myndus taffini

Wefels, E.; Morin, J.P.; Randles, J.W.
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
37.36%
Coconut foliar decay virus (CFDV) is transmitted to coconut palms by adults of the cixiid plant hopper Myndus taffini . Larvae of this vector develop on the alternate host, Hibiscus tiliaceus , but the way in which the adults become infective has not been studied. We show by in situ hybridization that viral DNA is associated with gut and ovaries but to distinguish between semipersistent, circulative or propagative modes of transmission we looked for evidence of replication in the vector. Larvae raised from eggs laid on the roots of H. tiliaceus , and adults fed on infected coconut leaf, were tested for the presence of the replicative form of CFDV DNA by a single-primer sense-specific PCR assay which distinguishes between virion-sense and complementary-sense CFDV-DNA. We report that only the virion-sense form of CFDV-DNA could be detected in both larvae and adults whereas both senses, indicating the presence of the double- stranded replicative form of the virus DNA, were detected in infected coconut leaf. About 16 % of the larvae were virus positive by this assay. As the larvae had not had access to coconut palm and there was no evidence of virus replication in the larvae or adults, a persistent-circulative mode of transmission is proposed in which the virus is acquired from H. tiliaceus by nymphs and transmitted transstadially to adults. Confirmation of this hypothesis requires the susceptibility of H. tiliaceus to CFDV to be tested.; E. Wefels...

Reflexos da utilização de farelo de coco sobre o valor nutricional do filé de tilápia-do-nilo (Oreochromis niloticus Linnaeus, 1857); The impact of the use of coconut meal on the nutritional value of the nile tilapia (Oreochromis niloticus Linnaeus, 1857)

OMENA, Cristhiane Maria Bazílio de; MENEZES, Maria Emília da Silva; CARVALHO, Cenira Monteiro de; SILVA, Jaqueline Maria da; OLIVEIRA, Maria Beatriz Farias de; MIRANDA, Edma Carvalho de; PINHEIRO, Denise Maria; ALENCAR, Severino Matias de; SANT'ANA, Ant
Fonte: Sociedade Brasileira de Ciência e Tecnologia de Alimentos Publicador: Sociedade Brasileira de Ciência e Tecnologia de Alimentos
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
37.3%
O uso do farelo de coco pode representar uma fonte alternativa na alimentação de peixe. Por esse motivo avaliaram-se os reflexos de sua utilização sobre o valor nutricional do filé de tilápia-do-nilo. O experimento foi realizado em um delineamento inteiramente ao acaso com 4 tratamentos (T1 - 0%, T2 - 10%, T3 - 20% e T4 - 30% de inclusão de farelo de coco) e cinco repetições. Foram determinados a composição centesimal, o teor de colesterol e os teores de ácidos graxos. Observou-se diferença (p < 0,05) entre T1 e T3, T2 e T3 para os teores de umidade; entre T2 e T3 para os lipídios; T1 apresentou diferença com relação aos demais tratamentos referentes aos carboidratos; e quanto aos teores de cinzas foi observada diferença de T1 e T2 entre T3 e T4. Os teores de colesterol apresentaram um aumento gradual significativo. Com relação aos ácidos graxos, observou-se diferença (p < 0,05) entre os tratamentos referentes aos C10:0; C12:0; C14:0; C18:1; C18:3 (gama); C20:3; e C22:6 numa proporção tal que não determinou diferença na qualidade nutricional do produto.; The use of coconut meal may represent an alternative source to fish feeding. The purpose of this work was to assess the impact of the use of coconut meal in Nile tilapia feeding and on the nutritional value of the fish fillets. The experiment was conducted in a completely randomized design with 4 treatments (T1 - 0%...

Eco-epidemiologic study of emerging fungi related to the work of babaçu coconut breakers in the State of Maranhão, Brazil

Nascimento,Maria do Desterro Soares Brandão; Leitão,Valéria Maria Sousa; Silva,Marcos Antonio Custódio Neto da; Maciel,Leonardo Bezerra; Muniz Filho,Walbert Edson; Viana,Graça Maria de Castro; Bezerra,Geusa Felipa de Barros
Fonte: Sociedade Brasileira de Medicina Tropical - SBMT Publicador: Sociedade Brasileira de Medicina Tropical - SBMT
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2014 EN
Relevância na Pesquisa
37.36%
Introduction: There are more than 300,000 extractors using the babaçu coconut as a source of income in the States of Maranhão, Pará, Tocantins and Piauí, and this activity is associated with fungal infections. The objective of this study was to examine the occurrence of emergent fungi in the conjunctiva, nails and surface and subcutaneous injuries of female coconut breakers in Esperantinópolis, Maranhão. Additionally, soil samples and palm structures were collected. Methods: The obtained samples were cultured in Petri dishes containing potato-dextrose-agar and chloramphenicol. The etiological agent was confirmed by a direct mycological exam and growth in culture. Results: In total, 150 domiciles were visited, and samples were collected from 80 patients. From the ground, the most frequently isolated fungus was Aspergillus niger (53. 8%). the most frequently detected fungus in babaçu coconut was Aspergillus niger (66.7%). Conjunctival fungal growth occurred in 76.3% of the women. The ocular fungal microbiota consisted of filamentous fungi (80.6%), and yeasts were present in 19.4% of cases. Onychomycosis was diagnosed in 44% (11/25) of the women. Conclusions: The identification of the genera Neosartorya...

Reflexos da utilização de farelo de coco na alimentação de tilápia do nilo (Oreochromis niloticus Linnaeus, 1857) sobre o valor nutricional do filé.; The impact of the use of coconut meal in feed for Nile tilapia (Oreochromis niloticus Linnaeus, 1857) on the nutritional value of fillet.

Omena, Cristhiane Maria Bazílio de
Fonte: Universidade Federal de Alagoas; BR; Química; Biotecnologia; Programa de Pós-Graduação em Química e Biotecnologia; UFAL Publicador: Universidade Federal de Alagoas; BR; Química; Biotecnologia; Programa de Pós-Graduação em Química e Biotecnologia; UFAL
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
37.36%
The fish diet exerts a great influence on its centesimal composition as well as the content of cholesterol and fatty acids. The use of coconut meal may represent alternative source in the fish diet in view of the cost and the availability in the Northeast of Brazil. The purpose of this work was to assess the impact of the use of coconut meal in feed for Nile tilapia (Oreochromis niloticus Linnaeus, 1857) on the nutritional value of fillet. 120 fingerlings of fish reversed were used, distributed in 20 boxes of polyethylene, containing 6 experimental units per boxe. The experiment was conducted in a completly randomized design with 4 treatments (T1 - 0%, T2 - 10%, T3 - 20% and T4 - 30% for the inclusion of coconut meal) and with five repetitions. After 90 days, the fish were slaughtered and the fillet was removed and the proximate composition, cholesterol and fatty acids were determined. There was a difference (p<0,05) between treatment T1 and T3, T2 and T3 with regard to levels of moisture; T2 and T3 to lipids; T1 to other treatments to carbohydrates and between T1 and T2, T3 and T4 to ash. The level of cholesterol showed a significant gradual increase following the increase in the inclusion of coconut meal. With regard to fatty acids...

Experimental density data and excess molar volumes of coconut biodiesel + n-hexadecane and coconut biodiesel + diesel at different temperatures

Mesquita,F. M. R.; Feitosa,F. X.; Santiago-Aguiar,R. S. de; Sant'Ana,H. B. de
Fonte: Brazilian Society of Chemical Engineering Publicador: Brazilian Society of Chemical Engineering
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2014 EN
Relevância na Pesquisa
37.3%
The density of the pure component (n-hexadecane), pure pseudo-components (coconut biodiesel and diesel) and pseudo-binary mixtures of coconut biodiesel with n-hexadecane (or + diesel) were measured at temperatures 293.15, 313.15, 333.15, 353.15 and 373.15 K and atmospheric pressure, over the entire composition range (mole fractions from 0.1 to 0.9, with a step de 0.1). Densities were determined using an Anton Paar SVM 3000 viscodensimeter. Experimental density values decreased with the increase of the temperature. The excess molar volumes of the pseudo-binary mixtures were calculated by using the experimental values of density. Excess molar volumes were correlated with the Redlich-Kister polynomial expansions. Excess molar volumes show positive and negative values in the two systems studied. Excess partial volumes at infinite dilution were calculated for coconut biodiesel, n-hexadecane and diesel in the mixtures studied.

Tratamento de efluente da indústria de coco utilizando os processo de Fenton e eletroquímico; Wastewater treatment industry coconut using the processes of Fenton and electrochemical

Gomes, Lúcio de Moura
Fonte: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Engenharia Química; UFAL Publicador: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Engenharia Química; UFAL
Tipo: Dissertação
POR
Relevância na Pesquisa
37.3%
Nowadays, the food industry is one of activities that fastest growing on the planet due to the demand for food, which ends up generating a lot of waste solids, liquids and gases that can contaminate / pollute water and soil. One of the food industry which generates a significant amount of waste is the coconut processing industry. In order to minimize the environmental impact is necessary to use some techniques in treatment of this wastewater that are efficient and economically viable. Between these techniques currently being studied, Advanced Oxidation Processes (AOPs) have received considerable attention due to the high efficiency in wastewater treatment and low operating cost. Among the AOPs, the application of the Fenton reaction and the Electrochemical process has been outstanding. These techniques have low toxicity and high efficiency for the mineralization of most organic pollutant compounds. However, due to the complexity of some effluents, the application of a single technique is not sufficient to adjust the effluent for disposal, thus, the association of the electrochemical technology and the Fenton reaction makes the process still more promising. The objective of this study was to evaluate the application of the Fenton reaction and the electrochemical process to treat wastewater generated by the coconut industry by applying the individual processes and associates. In this study was treated a synthetic wastewater composed of a mixture of coconut milk / water...

Estudo do potencial energético e aproveitamento das cascas de coco verde para a produção de briquete em Maceió - AL; Study of the potential energetic of coconut musk Green for the briquette production in Maceió-AL.

Esteves, Mayara Raysa Lima
Fonte: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Engenharia Química; UFAL Publicador: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Engenharia Química; UFAL
Tipo: Dissertação
POR
Relevância na Pesquisa
37.3%
Due to the necessity of exploring new energy resources and growing concern about the environment is that studies and researches have been conducted on the intention to propose alternative uses for waste material, previously discarded, the example of waste of agricultural origin that are presented as strong candidates for biomass for energy generation. Considering the high generation of waste biomass of green coconut in Maceió-AL, through the consumption of the fruit by the industrial bottling coconut water and fresh consumption of fruits sold by traders the edge of Maceió, estimated at 1430 tonnes produced annually. This paper proposes the use of agro-industrial waste, in the form of briquettes, substituted firewood, mostly originating from illegal source, and used to obtain thermal energy in industrial furnaces. We evaluated the energy potential of biomass , their physicochemical characteristics pre and post briquetting, the processes involved in the production of briquettes from the bark of the coconut, which after processing can be classified powder and fiber, with 12% moisture showed a high calorific of 18,5 MJ/kg and 19,5 MJ/kg respectively. Furthermore, we evaluated the market for briquettes city from major manufacturers to current and potential customers...

Reflexos da utilização de farelo de coco na alimentação de tilápia do nilo (Oreochromis niloticus Linnaeus, 1857) sobre o valor nutricional do filé.; The impact of the use of coconut meal in feed for Nile tilapia (Oreochromis niloticus Linnaeus, 1857) on the nutritional value of fillet.

Omena, Cristhiane Maria Bazílio de
Fonte: Universidade Federal de Alagoas; BR; Química; Biotecnologia; Programa de Pós-Graduação em Química e Biotecnologia; UFAL Publicador: Universidade Federal de Alagoas; BR; Química; Biotecnologia; Programa de Pós-Graduação em Química e Biotecnologia; UFAL
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
37.36%
The fish diet exerts a great influence on its centesimal composition as well as the content of cholesterol and fatty acids. The use of coconut meal may represent alternative source in the fish diet in view of the cost and the availability in the Northeast of Brazil. The purpose of this work was to assess the impact of the use of coconut meal in feed for Nile tilapia (Oreochromis niloticus Linnaeus, 1857) on the nutritional value of fillet. 120 fingerlings of fish reversed were used, distributed in 20 boxes of polyethylene, containing 6 experimental units per boxe. The experiment was conducted in a completly randomized design with 4 treatments (T1 - 0%, T2 - 10%, T3 - 20% and T4 - 30% for the inclusion of coconut meal) and with five repetitions. After 90 days, the fish were slaughtered and the fillet was removed and the proximate composition, cholesterol and fatty acids were determined. There was a difference (p<0,05) between treatment T1 and T3, T2 and T3 with regard to levels of moisture; T2 and T3 to lipids; T1 to other treatments to carbohydrates and between T1 and T2, T3 and T4 to ash. The level of cholesterol showed a significant gradual increase following the increase in the inclusion of coconut meal. With regard to fatty acids...

CONSERVATION OF COCONUT WATER BY REFRIGERATATION; CONSERVAÇÃO DE ÁGUA DE COCO POR REFRIGERAÇÃO

SALOMÃO DAVID, PAULO ROBERTO DE BARROS; Universidade Católica de Pernambuco; FERNANDES, ZELITA DE FARO; Universidade Católica de Pernambuco
Fonte: UFPR Publicador: UFPR
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 15/04/2009 POR
Relevância na Pesquisa
37.3%
The quality of the process of bottling and refrigerating coconut water from unripe coconut fruits (Cocus nucifera, L.) was evaluated for shelf-life period of 24 to 48 hours. Samples were picked up for physicochemical determinations (acidity, pH, °Brix, and total sugar content) for microbiological analysis (total bacterial count, total and fecal coliforms, molds, and yeast) and sensory evaluation. The acceptability of the product was evaluated by the Modified Triangular Test. The data indicated the process as adequate, according to the hygienic conditions and that both the physicochemical and the microbiological analyses revealed all samples in accordance with Brazilian standards. The coconut water presented itself safe for consumption after bottled and stored at 10 °C for 48 hours. A light change in the product color was observed after the storage, but the change had no influence on the product acceptability.; Avaliou-se a qualidade do processo de envase e refrigeração da água de coco verde (Cocus nucifera, L.), durante armazenamento de 24 e 48 horas. Amostras foram colhidas aleatoriamente para análises físico-químicas (acidez total, pH, oBrix e açúcares totais), microbiológicas (contagem padrão em placas...

Usage of green coconut water and different tissue culture media for in vitro honey bee semen storage (apis mellifera; hymenoptera: apoidea)

Almeida,Rosana; Espencer Egea Soares,Ademilson
Fonte: ASOCIACIÓN INTERCIENCIA Publicador: ASOCIACIÓN INTERCIENCIA
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2002 EN
Relevância na Pesquisa
37.3%
Honey bee semen was stored in green coconut (Cocos nucifera L.) water plus dihydrostreptomycin and in commercial tissue culture media at different temperatures. Glass capillary microtubes of 0.1cm diameter and centrifuge microtubes 0.2ml capacity were used for semen storage. Sperm motility was assessed after 1, 2, 5, 10, 15, 30, 50, 80 and 120 days. Queens were instrumentally inseminated with diluted semen and their laying behavior evaluated. Storage in coconut water shows living sperm until 80 days. However, the queen’s laying was normal and resulted in viable worker brood only when semen stored up to 15 days in coconut water medium was used for insemination. Coconut water seems to be an ideal natural diluent for short periods in vitro storage of honey bee semen and can be an appropriate method for genetic improvement programmes for honey bees.