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Extraction of essential oils from lime (Citrus latifolia Tanaka) by hydrodistillation and supercritical carbon dioxide BABT
Atti-Santos,Ana Cristina; Rossato,Marcelo; Serafini,Luciana Atti; Cassel,Eduardo; Moyna,Patrick.
In this work lime essential oils were extracted by hydrodistillation and supercritical carbon dioxide. In the case of hydrodistillation, the parameters evaluated were extraction time and characteristics of the plant material. In supercritical extraction, the parameters evaluated were temperature, pressure, CO2 flow, extraction time and material characteristics. Considering citral content, the best results for hydrodistillation were obtained with a distillation time of 3 hours using whole peels. The best results for supercritical extraction were found using 60ºC, 90 bar, at a CO2 flow rate of 1 mL/ min for 30 minutes using milled peels. The best yields of lime oil were obtained by hydrodistillation (5.45% w/w) and supercritical extraction (7.93% w/w) for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus latifolia; Lime; D-limonene; Supercritical carbon dioxide; Hydrodistillation.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100020
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Study of gels of molybdenum with cerium in the preparation of generators of 99Mo - 99mTc BABT
Moraes,Vanessa; Marczewski,Bárbara; Dias,Carla Roberta; Osso Junior,João Alberto.
99mTc has ideal nuclear properties for organ imaging in nuclear medicine, and it is obtained from the 99Mo-99mTc generator. Four different types of generators are available: chromatographic that uses 99Mo from fission of uranium; MEK solvent extraction; Tc2O7 sublimation; gel chromatographic. This work presents the preparation of gel generators of molybdenum with cerium and characterization of the gels: mass ratio between molybdenum and cerium, structure, size of particles and elution percentage of 99mTc after irradiating the gels. Eight gels were prepared at the same temperature of 50 ºC with concentrations of NaOH of 2 and 4 mol/L, mass ratio of 0.31 and 0.38 and final pH of 3.5 and 4.5. The analysis of the results proved that these gels are not adequate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Radioisotopes; Technetium-99m; Molybdenum-99; Gel generator.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000700007
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Restructured fish product from white croacker (Micropogonias furnieri) mince using microbial transglutaminas BABT
Gonçalves,Alex Augusto; Passos,Marcelo Gonzalez.
This study aimed at determining the influence of three concentrations of commercial transglutaminase enzyme in restructured fillet of minced fish from white croacker (Micropogonias furnieri), one of the four marine species with notability in Brazil. The restructured fillet developed had advantages when compared to traditional fillet, such as absence of spine and less flavour intensity (washes cycles). Washing process for white croacker mince was compared with five clarification agents: water (control), phosphoric acid (H3PO4), sodium chloride (NaCl), calcium carbonate (CaCO3) and sodium bicarbonate (NaHCO3). The higher quality product (whiteness) was obtained with calcium carbonate washes. Three concentrations (1.5, 1.0 and 0.5%) of microbial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Seafood; Minced fish; White croacker; Transglutaminase; Restructured fish.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400030
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Production and Characterization of Bacteriocin Produced by Lactobacillus Viridescence(NICM 2167) BABT
KP,Sure; PV,Kotnis; PK,Bhagwat; RC,Ranveer; PB,Dandge; AK,Sahoo.
The present study focused on the production optimization of bacteriocin by Lactobacillus viridescence NICM 2167 followed by its purification and characterization. The bacteriocins are antimicrobial peptides produced by many Gram positive and Gram negative bacteria.The bacteriocin produced by LAB (lactic acid bacteria) received attention in recent years due to their potential application as natural preservatives in food. Bacteriocinproduced by Lactobacillus viridescence showed broad range of antimicrobial activity against food borne pathogens. Production parameters were optimized showing highest production of bacteriocinin MRS broth with pH= 7.0 incubated at 37°C for 48 h. Bacteriocin was purified in two steps involving ammonium sulphate precipitation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactobacillus viridescence; NICM 2167; Bacteriocin; Antimicrobial activity; Gel filtration.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100407
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Effects of light and temperature on seed germination in Cecropia hololeuca Miq. (Cecropiaceae) BABT
Godoi,Simone; Takaki,Massanori.
Seeds of Cecropia hololeuca were submitted to regimes of constant and alternating temperatures, associated with photoperiods of white light, "shade light" and continuous darkness under controlled conditions in laboratory. Seeds did not germinate at constant temperatures of 10°C to 20°C and above 35°C. Seeds only germinated in the darkness when the temperature was alternated. "Shade light" inhibited germination. We concluded that the regime of alternating temperatures suppressed the light effects on seed germination of this species.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cecropia hololeuca; Germination; Alternating temperature; Phytochrome; Light.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200004
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Electrolytic treatment applied to the industrial effluent containing persistent wastes monitored by Bartha respirometric assays BABT
Régis,Gisela; Bidoia,Ederio Dino.
The effluent of a rubber chemical antioxidant and antiozonant producer industry, with high content of organic material was subjected to electrolytic process. To evaluate the speed of stabilization of the eletroctrolyzed effluents, and to evaluate the biodegradation the respirometric test of Bartha and Pramer was used. The monitoring of the biodegradation of the effluent, after different periods of electrolysis show that the ideal time of electrolysis was 10 and 25 min. It was concluded that the eletrolytic process was viable to diminish the adaptation time of the microorganism to the effluent and consequently increased the biodegradation of effluent.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electrolytic process; Biodegradation; Wastes pollutant; Electrodes.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200020
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Editorial BABT
Tipo: Info:eu-repo/semantics/other
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000200001
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Population Changes of Eubacteria, Sulfate-Reducing Bacteria and Methanogenic Archaea in an Anaerobic Reactor Processing Ethanol Distillery Vinasse BABT
Brown,Adis Ivonne Terry; Pozzi,Eloisa; Damianovic,Marcia Helena Rissato Zamariolli; Briones,Homero Enrique Urrutia; Ortiz,Leslie Ester Abarzúa; Pires,Eduardo Cleto.
Abstract The microbiological characterization by molecular techniques (DGGE and quantitative PCR) of Archaea, Bacteria domain and sulfate-reducing bacteria (SRB) from a laboratory scale Up-flow Anaerobic Sludge Blanket (UASB) processing sugar cane vinasse was performed during the operational phase with increasing organic loads. The organic load removal efficiency was between 97% and 75% for volumetric organic loads (VOL) in the range of 0.6 to 15.4 kgCOD.m-3.d−1 and for higher VOL (until 27.0 kgCOD.m-3 .d−1) the removal efficiency decreased to 48%. Archaea represented the majority of the estimated population (107 copies of 16S RNA ribosomal gene. mL-1) followed by bacteria (106 copies of 16S RNA ribosomal gene. mL-1) and sulfate-reducing bacteria (SRB)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: UASB reactor; Microbial characterization; Methanogenesis; Sulfidogenesis; DGGE; Quantitative PCR.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100203
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Comparison of biostimulation and bioaugmentation techniques for the remediation of used motor oil contaminated soil BABT
Abdulsalam,Surajudeen; Omale,Adaji Benjamin.
This study was carried out on the bioremediation of used motor oil contaminated soil artificially contaminated to a pollutant level of 40,000ppm using biostimulation and bioaugmentation remediation techniques for 42 days. Four treatment options were investigated in wooden microcosms: Control (T1), water amended (T2), biostimulation (T3) and hybrid of biostimulation and bioaugmentation (T4). The effectiveness of bioremediation processes were monitored using the total petroleum hydrocarbon removal (TPH) and total bacterial count (TBC). T3 had the highest TPH removal rate (69.2±0.05%), followed by T4 (65.2±0.25%) and T2 (58.4±0.5%); the control (T1) had the lowest TPH removal rate (43.2±1.5%). TBC revealed that bioremediation actually took place; T4 had the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioremediation; Biostimulation; Bioaugmentation; TPH; Used motor oil; Wooden microcosms.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300027
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Benthic Community zonation in a breakwater on the north coast of the state of Rio de Janeiro, Brazil BABT
Masi,Bruno Pereira; Macedo,Isabela Maria; Zalmon,Ilana Rosental.
The present study presents the vertical zonation pattern of the intertidal benthic organisms on granitic boulders in the Farol de São Tomé beach (22º02'S, 41º03'W), Rio de Janeiro State. Four sampling profiles using 20 x 20 cm quadrats through a photo quadrat technique revealed four horizontal bands: (1) Littoral Fringe characterized by empty space and Littorina; (2) Upper eulittoral mainly occupied by Chthamalus and bare rock; (3) Lower eulittoral characterized by Chthamalus, Phragmatopoma, Ulva and Centroceras; and (4) Sublittoral Fringe characterized by Ulva, Phragmatopoma and Hypnea. The high variability in the relative abundance of the dominant species among the profiles may be attributed to the high topographic irregularity, reflecting in different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Intertidal zonation; Rocky shore; Benthic community; North coast of Rio de Janeiro.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300016
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Effect of temperature shock on soybean microspore embryogenesis BABT
Moraes,Ana Paula de; Bonadese-Zanettini,Maria Helena; Callegari-Jacques,Sídia Maria; Kaltchuk-Santos,Eliane.
In this study the effect of cold and heat shock on androgenetic induction in soybean anther culture was tested. Anthers of soybean were subjected to 4 and 33ºC, while the anthers used for control were maintained at 25ºC. Cytological analysis done during the 30 days of culture showed that frequencies of symmetrical binucleated and multicellular pollen grain did not differ among temperature treatments. Multicellular pollen grain could be formed by symmetrical division, as well as by assymetrical division. In relation to the embryo induction, the results of the treatments did not differ too. These results suggested that these treatments did not induce a sporophytic pathway in soybean.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anther culture; Soybean; Androgenesis; Symmetrical mitosis; Temperature shock; Stress.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400006
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Genetic variation and interrelationships of agronomic characteristics in durum wheat under two constructing water regimes BABT
Talebi,Reza; Fayyaz,Farzad; Naji,Amir Mohammad.
This work aimed to study the grain yield components and plant characteristics related to grain yield. Twenty-four durum wheat genotypes from the ICARDA durum wheat breeding program were grown during 2006-2007 under rainfed and irrigated conditions using a complete randomized block design with three replicate in west of Iran. Correlation and path analysis were carried out. Results showed that there was strong positive association of grain yield with the number of seed/spike, biomass and harvest index. Grain yield was negatively associated with spike length and plant height in different moisture conditions. Comparatively, high genetic variation was found in grain yield and other characteristics. Hierarchical cluster analysis was used as a tool to classify...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Durum wheat; Drought stress; Yield components; Path analysis.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400006
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Coffee Berry Borer Resistance in Coffee Genotypes BABT
Sera,Gustavo Hiroshi; Sera,Tumoru; Ito,Dhalton Shiguer; Ribeiro Filho,Claudionor; Villacorta,Amador; Kanayama,Fabio Seidi; Alegre,Clayton Ribeiro; Del Grossi,Leandro.
The aim of this study was to evaluate the coffee germplasm of the Paraná Agronomic Institute (IAPAR) for resistance to the coffee-berry-borer. Preliminary field evaluation was performed in August 2004 and the fruits of less damaged genotypes in the field were evaluated under controlled condition with obligated and free choice experiments established in a randomized complete design with three replications. The genotypes were evaluated fifteen days after infestation with one borer per fruit in Petri dishes. The data were analyzed by the Scott-Knott means test at 1 % and by the χ2 test. Statistical analysis indicated that Coffea kapakata, Psilanthus bengalensis, C. eugenioides and genotypes with C. eugenioides genes were resistant. These genotypes presented...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Breeding; Coffea; Cultivars; Hypothenemus hampei; Psilanthus.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200003
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Estudo comparativo do crescimento de plantas de tomate e milho sob condições de salinidade BABT
Bezerra Neto,Egídio; Nogueira,Rejane Jurema Mansur Custódio.
Plantas de tomate (Lycopersicum esculentum Mill) e de milho (Zea maiz L.) foram cultivadas em meio hidropônico, em presença de 0 ou 100 mmol de NaCl por litro de solução nutritiva. Trinta dias após o início da aplicação dos tratamentos foi realizada coleta para a análise dos parâmetros de crescimento. A taxa de crescimento absoluto de ambas as espécies diminuiu com a salinidade. O tratamento salino não afetou a alocação de biomassa das folhas, provocou uma diminuição na alocação da biomassa do caule e aumento da alocação da biomassa das raízes das plantas de tomate e de milho. Ocorreu uma redução de 48,01 % na área foliar das plantas de milho e de 58,75 % nas de tomate, devido ao tratamento salino. A razão de área foliar nas plantas de milho foi reduzida...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Lycopersicum esculentum; Leaf area; Dry matter; Fresh matter.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400013
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Erratum: Anticandidal effect of endophytic bacteria isolated from Equisetum arvense L. against Candida albicans and Candida glabrata BABT
Tipo: Info:eu-repo/semantics/other
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100902
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Propriedades funcionais de concentrado protéico extrusado de sementes de girassol BABT
Murate,Elenice H.; Prudencio-Ferreira,Sandra H..
Propriedades funcionais de concentrado protéico de sementes de girassol extrusado a 135, 143 e 151ºC e com 20 e 24% de umidade (base seca) foram avaliadas. Os resultados demonstraram que a extrusão, dependendo das condições, provocou um aumento nos valores de solubilidade da proteína em água, capacidade de absorção de água e gordura, capacidade e atividade emulsificante, estabilidade da emulsão, capacidade de formação de espuma, porém não alterou a propriedade de estabilidade de espuma do concentrado protéico. A solubilidade das proteínas do concentrado protéico extrusado e não extrusado em função do pH foi menor no intervalo de 4,0 a 6,0 e houve um aumento significativo a partir do pH 7,0 para a amostra não extrusada.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Proteína; Girassol; Extrusão; Propriedades funcionais.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200012
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Extraction of pectin from apple pomace BABT
Canteri-Schemin,Maria Helene; Fertonani,Heloísa Cristina Ramos; Waszczynskyj,Nina; Wosiacki,Gilvan.
As apple-processing units are now in expansion in Brazil, industrial by-products like pomace play an important role in pectin manufacture. The objective of this article was to determine a pratical follow-up to the extraction of pectin from apple pomace and to characterize it in a laboratory, on a small scale, aiming at establishing the optimum conditions for acid extraction. The highest yields were obtained when [1]apple pomace was dried and ground to obtain an apple flour to be used as raw material, [2] citric or nitric acids were used and [3] when the citric acid concentration was 6.2 g/100 ml and the time of reaction was 153 minutes. The apple variety in itself was not significant in pectin yield. The degree of esterification (DE = 68.84 %) of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apple pomace; Pectin; Agricultural wastes; Yield; Extraction; Response Surface Methodology.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200013
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Oxidative Damage and Antioxidant Response in Chenopodium murale L. Exposed to Elevated Levels of Zn BABT
Zoufan,Parzhak; Karimiafshar,Amer; Shokati,Sara; Hassibi,Payman; Rastegarzadeh,Saadat.
ABSTRACT Present study was carried out to investigate the effects of different Zn concentrations on growth and some antioxidant responses in Chenopodium murale L. The seeds were sown on the pots. 45-day plants were transferred to hydroponic solution containing 0.2 (control), 150, 300 and 600 µM Zn. The plants were harvested at 6 days after applying Zn treatments and some parameters were evaluated including plant length, fresh weight, photosynthetic pigments, malondialdehyde (MDA), ascorbate, proline and enzymatic antioxidants such as catalase (CAT), guaiacol peroxidase (GPX) and superoxide dismutase (SOD). Zn concentration showed a considerable increase in the shoot and root as the concentration of Zn increased in the medium, meanwhile the roots were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascorbate; Enzymatic antioxidant; Lipid peroxidation; Proline; Zinc.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100418
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Effect of different levels of sodium chloride and glucose on fermentation of sardines (Sardinella brasiliensis) by Lactobacillus sakei 2a BABT
Espirito Santo,Milton Luiz Pinho; Lisboa,Cristiane; Alves,Fernanda Gonçalves; Martins,Daniela; Beirão,Luiz Henrique; Sant'Anna,Ernani Sebastião; Franco,Bernadette Dora Gombossy de Melo.
Lactobacillus sakei 2a is a bacteriocin producer strain. In this study, it's effects as a starter culture in the curing process of sardine (Sardinella brasiliensis) fillets were studied at different concentrations of NaCl (2, 4, 6%) and glucose (2, 4%). After 21 days of fermentation, the spoilage microorganisms population reached 9.7 Log10 CFU g-1 corresponding to 6% NaCl and 4% glucose. With no addition of glucose and starter culture, sardine fillets began spoilage 72 hours after fermentation, even when 6% NaCl was used. Little differences were observed in lactic acid production when 2 and 4% glucose were added, since total acidity was 1.32 and 1.34% respectively, the experiments with 6% NaCl presented the best results. Initial pH of sardine fillets was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sardinella brasiliensis; Lactobacillus sakei 2a; Fermented fish.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100008
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Enzymatic activity of endophytic bacterial isolates of Jacaranda decurrens Cham. (Carobinha-do-campo) BABT
Carrim,Aysha Jussara Ivonilde; Barbosa,Edweis Cândida; Vieira,José Daniel Gonçalves.
The objectives of this work was to isolate endophytic bacteria from Jacaranda decurrens Cham. and screening of some enzymes of biotechnological interest. Ten (10) bacterial species were isolated and identified from the leaves and steams. All the isolates presented enzymatic activity, which was ranked as follows: proteolytic (60%) and amilolytic activity (60%), lipolytic (40%), esterasic (40%). However, cellulolytic and pectinolytic activities were not detected. This is the first report on the isolation and identification of endophytic bacteria from Jacaranda decurrens Cham.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endophytic bacteria; Jacaranda decurrens; Enzymes.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400001
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