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Registros recuperados: 15
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Acid and enzymatic hydrolysis to recover reducing sugars from cassava bagasse: an economic study BABT
Woiciechowski,Adenise Lorenci; Nitsche,Saul; Pandey,Ashok; Soccol,Carlos Ricardo.
The objective of this work was to study the acid and enzymatic hydrolysis of cassava bagasse for the recovery of reducing sugars and to establish the operational costs. A statistical program "Statistica", based on the surface response was used to optimize the recovery of reducing sugars in both the processes. The process economics was determined considering the values of reducing sugars obtained at laboratory scale, and the operations costs of a cylindrical reactor of 1500 L, with flat walls at the top and bottom. The reactor was operated with 150 kg of cassava bagasse and 1350 kg of water. The yield of the acid hydrolysis was 62.4 g of reducing sugars from 100 g of cassava bagasse containing 66% starch. It represented 94.5% of reducing sugar recovery. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cassava bagasse; Hydrolysis; Acid; Enzyme; Reducing sugars; Economics.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300018
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Biochemical and isoenzyme analyses of elephant grass, Pennisetum purpureum (Schum) varieties Scientia Agricola
Bach,E.E.; Alcântara,V.B.G.; Alcântara,P.B.; Veasey,E.A..
This study characterized seven Pennisetum purpureum varieties, namely v. Anão, Bajra, Cameroon, Guaçu, Roxo, Taiwan A-144 and Uruckwami, through biochemical analyses, including protein, glucose and fructose contents, and polyacrylamide gel electrophoresis using the esterase system, by sampling 30, 60, 90, 120 and 150 day-old leaves. The number of nodes per stem and the percentage of bud emergence were also recorded. Variety Taiwan A-144 presented the highest number of nodes per stem and percentage of emerging buds. Protein concentration decreased gradually after 60 days for all varieties, except for Anão. Variety Guaçu presented the highest level of glucose in 90 day-old plants, whereas Cameroon presented the highest levels at 120 and 150 days. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electrophoresis; Reducing sugars; Proteins; Elephant grass; Pennisetum purpureum.
Ano: 1995 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000300019
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Changes in amylase activity starch and sugars contents in mango fruits pulp cv. Tommy Atkins with spongy tissue BABT
Lima,Luiz Carlos de Oliveira; Chitarra,Adimilson Bosco; Chitarra,Maria Isabel F..
Changes in amylase activity, starch and reducing and non-reducing sugars contents were monitored during ripening of mango fruits (Mangifera indica L.). The climateric raising in mango fruit is marked by an appreciable increase in the activity of amylase, reducing and non-reducing sugars contents and decrease in the starch content. The fruit affected with spongy tissue exhibited much lower amylase activity and reducing and non-reducing sugars, but exhibited much higher starch content during storage at 12 ± 2° C and 90 ± 5% RH for 28 days, when compared to healthy tissue of ‘Tommy Atkins’. Whether this is caused due to adverse effects on certain enzyme activities during ripening is not clearly known. These dates showed that carbohydrate metabolism is an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Starch; Amylase; Reducing sugars; Non-reducing sugars.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000100008
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EVALUATION OF LITCHI VARIETIES SEEKING SOURCES RESISTANT TO Aceria litchi MITE Rev. Bras. Frutic.
ARANTES,RENAN FIACADORI; ANDRADE,DANIEL JUNIOR DE; AMARAL,INGRID; MARTINS,ANTONIO BALDO GERALDO.
ABSTRACT Since the first report of Aceria litchi in Brazil, litchi productivity is reducing in the main productive regions. The aims of this study were to evaluate litchi varieties in relation to feeding by A. litchi mite and to determine the moisture and reducing sugars contents, seeking sources resistant to this mite. The experiment was conducted in the Fruit Growing Active Germoplasm Bank, Laboratory of Acarology and Laboratory of Soil Biochemistry at FCAV/UNESP. The plant varieties evaluated were Americana, Bengal, Groff, Mauritius and Sweet Clift varieties. Descriptions were performed regarding symptoms caused by A. litchii, moisture and reducing sugars contents present in the leaves of plantvarieties. There were differences among varieties with...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Erinose mite; Eriophyidae; Reducing sugars; Plant breeding.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000700801
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GAS EXCHANGE AND CARBOHYDRATE PARTITIONING IN COFFEE SEEDLINGS UNDER WATERLOGGING Ciência e Agrotecnologia
Silveira,Helbert Rezende de Oliveira; Souza,Kamila Rezende Dázio de; Alves,Jose Donizeti; Santos,Meline de Oliveira; Andrade,Cínthia Aparecida; Bomfim,Sandro Costa.
Irrigation has enhanced coffee production in several regions of Brazil. However, with the increase in irrigated crop areas, problems related to the frequent and poorly planned usage of irrigation may arise. Since there are few studies related to the physiological alterations in coffee plants exposed to water excess, we evaluated the effects of waterlogging on metabolism and partitioning of carbohydrates, levels of photosynthetic pigments and gas exchange in seedlings of two commercial coffee cultivars (Mundo Novo and Catuaí). After acclimation, seedlings with eight pairs of fully expanded leaves were cultivated under three water availability conditions: field capacity, intermittent waterlogging and continuous waterlogging. Gas exchange and the levels of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water excess; Photosynthesis; Reducing sugars; Stomatal conductance; Water efficiency use..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000200138
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Gas exchanges and carbohydrate metabolism in orangetrees with citrus variegated chlorosis Braz. J. Plant Physiol.
Gomes,Mara de Menezes de Assis; Lagôa,Ana Maria Magalhães Andrade; Machado,Eduardo Caruso; Medina,Camilo Lázaro; Machado,Marcos Antônio.
Gas exchanges, sucrose, starch and reducing sugar contents were analyzed in leaves of orange trees with and without Citrus Variegated Chlorosis (CVC), a disease caused by the bacteria Xylella fastidiosa. Healthy plants (HP) and diseased plants (DP) were evaluated 20 and 26 months after bacterial inoculation, in October 1998 and April 1999, respectively. On the first evaluation date, CO2 assimilation rates for HP were greater than DP in the early morning and midday, but on the second date they were greater in HP all along the day. On the first date, there was an increase in the sucrose content of DP at 15:00 h and 17:00 h in relation to HP. On the second evaluation date, DP presented greater reducing sugar content only in the early morning while sucrose...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus sinensis L.; Photosynthesis; Reducing sugars; Starch; Sucrose; Xylella fastidiosa.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000100004
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Hydrolysis of various thai agricultural biomasses using the crude enzyme from Aspergillus aculeatus iizuka FR60 isolated from soil BJM
Boonmee,Atcha.
In this study, forty-two fungi from soil were isolated and tested for their carboxymethyl cellulase (CMCase) and xylanase activities. From all isolates, the fungal isolate FR60, which was identified as Aspergillus aculeatus Iizuka, showed high activities in both CMCase and xylanase with 517 mU/mg protein and 550 mU/mg protein, respectively. The crude enzyme from A. aculeatus Iizuka FR60 could hydrolyze several agricultural residues such as corncob, and sweet sorghum leaf and stalk at comparable rates with respect to the tested commercial enzymes and with a maximum rate in rice hull hydrolysis (29 μg sugar g-1 dry weight substrate mg-1 enzyme hr-1). The highest amount of glucose was obtained from corncob by using the crude enzyme from A. aculeatus Iizuka...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural wastes; Aspergillus aculeatus Iizuka; Enzymatic hydrolysis; Mean specific rate; Reducing sugars.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200005
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Influence of agro-ecological production areas on antioxidant activity, reducing sugar content, and selected phytonutrients of orange-fleshed sweet potato cultivars Ciênc. Tecnol. Aliment.
Motsa,Nozipho Mgcibelo; Modi,Albert Thembinkosi; Mabhaudhi,Tafadzwanashe.
Sweet potato is an important staple, and it is mainly known for its contribution of β-carotene in human diet. The effects of cultivar and habitat on this pigment and other nutritional characteristics of the crop still require investigation. In this study, three locally bred cultivars of sweet potato, two of which are orange-fleshed, were grown in three different agro-ecological areas to determine soluble sugar content, β-carotene, and total antioxidants of roots. In addition antioxidant activity, total carotenoids, and chlorophyll content were determined in edible leaves. Reducing sugars, β-carotene, total antioxidants capacity, total carotenoids, and chlorophyll content were significantly affected by environmental conditions. The location at lower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agro-ecological areas; Sweet potato cultivars; Reducing sugars; Phytonutrients.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000100032
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Maturation curves of sweet sorghum genotypes Ciência e Agrotecnologia
Souza,Renan Silva e; Parrella,Rafael Augusto da Costa; Souza,Vander Fillipe de; Parrella,Nádia Nardely Lacerda Durães.
ABSTRACT Sweet sorghum [Sorghum bicolor (L.) Moench] stands out as a complementary crop to sugarcane Saccharum spp. for the production of ethanol, since it has juicy stems with directly fermentable sugars. Due to this fact, there is a need for the analysis of sweet sorghum properties in order to meet the agro-industry demand. This work aimed to develop and study the maturation curves of seven sweet sorghum cultivars in ten harvest dates. The results showed a significant difference between cultivars and harvest dates for all parameters analysed (p≤0.01). Regarding the sugar content, the cultivars BRS508, XBWS80147 and CMSX629 showed the highest means for the total reducing sugars (TRS) and recoverable sugar (RS). In the production of ethanol per tonne of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ethanol; Reducing sugars; Period of industrial use..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000100046
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Physical and chemical properties of granulated cane sugar "panelas" Ciênc. Tecnol. Aliment.
Guerra,Marisa Josefina; Mujica,María Virginia.
"Panela" is a natural sweetener obtained by concentrating sugar cane juice and handmade in small factories. In the study carried out, the physical and chemical properties of two commercial brands of artisanal granulated panelas and of one made on an experimental level were determined. Three lots of each sample were analyzed. The parameters measured were moisture, a w, protein, ash, minerals, reducing sugars, sucrose, pH, color (L, a and b), insoluble solids (IS), transmittance a 720 nm and filterability. In addition, a qualitative test to detect sulphur dioxide was performed. The parameters with higher variability were moisture (1.66-4.36 g.100 g-1), a w (0.51-0.69), reducing sugars (4.58-11.48 g.100 g-1), pH (5.58-6.90), and color. Potassium was the most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sweetener; Sugar cane; Artisanal; Minerals; Reducing sugars; Insoluble solids; Panelas; Physical and chemical properties.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000100037
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Processing quality of potato tubers produced during autumn and spring and stored at different temperatures Horticultura Brasileira
Freitas,Sergio T de; Pereira,Engil Isadora P; Gomez,Ana Cecília S; Brackmann,Auri; Nicoloso,Fernando; Bisognin,Dilson A.
The objective of this work was to access processing quality of potato clones (Solanum tuberosum) Asterix, SMINIA793101-3, and Missaukee cultivated during spring and autumn growing seasons and stored at 4, 8, 12, or 25ºC. Clones grown in spring had shorter dormancy than clones grown in autumn. Potato tubers grown in spring and autumn and stored at 4ºC, as well as tubers grown in autumn and stored at 8ºC had no sprouting for six months. Among clones grown in autumn, the longest dormancy period during storage at 12ºC was observed in the clone SMINIA793101-3, and at 25ºC was in the clone Asterix. In potato tubers grown in spring, the longest dormancy period during storage at 8ºC was observed in the clones SMINIA793101-3 and Missaukee, at 12ºC was in the clone...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum tuberosum; Dry matter; Respiration; Chip color; Reducing sugars; Polyphenols.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000100016
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Productivity and quality of potato cultivars for processing as shoestrings and chips Horticultura Brasileira
Araújo,Thaís H; Pádua,Joaquim G; Spoto,Marta HF; Ortiz,Vanessa DG; Margossian,Priscila L; Dias,Carlos TS; Melo,Paulo CT.
ABSTRACT Brazilian market of potato processing has presented expressive development in recent years. However, its expansion is constrained by raw material supply suitable for industrial processing. Selection of adequate cultivars contributes to final product cost reduction as well as its yield and quality improvement. The research aimed to study tuber yield and evaluate its frying potential for shoestrings and chips, of potato cultivars recently introduced in Brazil. Nine potato cultivars (Arizona, Caruso, Destiny, Excelence, Saviola, Agata, Almera, Fontane and Markies) were assessed in an experiment carried out between January and May, 2013, in South-West region of Minas Gerais State, Brazil. 'Arizona' and 'Caruso' cultivars exhibited superior productive...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum tuberosum; Dry matter content; Reducing sugars; Oil uptake; Chips color; Industrial yield.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000400554
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Sweet sorghum - a potential alternate raw material for bio-ethanol and bio-energy Open Agri
Reddy, B.V.S.,( Belum V. S. Reddy ).
Palavras-chave: Alcohols; Sorghum; Confectionery; Hybrids; Molasses; Sugarcane; Carbohydrates; Reducing sugars; Heterosis; Production technology.
Ano: 2005 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3267
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Technological quality and utilization of potato tubers Scientia Agricola
Feltran,José Carlos; Lemos,Leandro Borges; Vieites,Rogério Lopes.
Increasing concerns have been verified with regard to the quality factor of potato tubers and their correct form of use and consumption. The purpose of this research was to determine the technological quality of potato tuber cultivars and identify the best forms of use and consumption. A completely randomized experimental design was adopted with 18 treatments represented by cultivars Agata, Apuã (IAC-5977), Aracy (IAC-2), IAC Aracy Ruiva, Asterix, Bintje, Dali, Clone IAC-6090, Itararé (IAC-5986), Laguna, Remarka, Liseta, Mondial, Novita, Oscar, Picasso, Santana, and Solide, with four replications. Specific gravity showed a positive correlation with starch content, texture, pulp pH, and soluble solids, and was negatively correlated with reducing sugars. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum tuberosum; Dry matter; Reducing sugars; Starch content.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000600006
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Utilization of residue from cassava starch processing for production of fermentable sugar by enzymatic hydrolysis Ciênc. Tecnol. Aliment.
SOUTO,Luciana Reis Fontinelle; CALIARI,Márcio; SOARES JÚNIOR,Manoel Soares; FIORDA,Fernanda Assumpção; GARCIA,Marina Costa.
Abstract The aim of this study was to characterize and perform enzymatic hydrolysis of cassava peeling residue (peel and inner peel), mainly composed of peels and small pieces. Residue was sanitized, dried at 55 °C for 24 hours and ground. The obtained flour showed pH of 4.85; 72.53 g 100 g–1 moisture; 5.18 mL 1M NaOH 100 g–1 acidity; 60.68 g 100 g–1 starch; 1.08 g 100 g–1 reducing sugar; 1.63 g 100g–1 ash; 0.86 g 100 g–1 lipid and 3.97 g 100 g–1 protein. Enzymatic hydrolysis was carried out by means of rotational central composite design, analyzing the effects of concentrations of α-amylase enzyme (10 to 50 U g starch–1), and the amyloglucosidase enzyme (80 to 400 U g starch–1) on variable responses: percent conversion of starch into reducing sugars (RSC)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manihotesculenta Cranz; Starch hydrolysate; Α-amylase; Amyloglucosidase; Reducing sugars.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000100019
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