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| Registros recuperados: 75 | |
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| Medri,Vandir; Pereira,Geni Varéa; Leonhardt,Júlio Hermann. |
| Studies were conducted to evaluate the effect of 10%, 20% and 30% ration substitutions for distillery yeast on the function Taguchis loss using two hundred and forty 45-day-old fingerlings of Nile tilapia (Oreochromis niloticus), sexually reverted with an initial average weight of 1.25 ± 0.14 g placed in amianthus box.. The average results obtained for the limnological parameters of the water quality control through chemical analysis were considered normal. Taguchis losses for the total production, for the dead and discarded fishes did not show correlation for the different levels of alcohol yeast inclusion, showing that the choice of the yeast level in the ration for these fishes depended on its availability and occasional cost. It was observed that the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quality; Ration; Taguchi; Tilapia; Yeast. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000100011 |
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| Araújo,Lúcia de Fátima; Medeiros,Ariosvaldo Nunes; Perazzo Neto,Américo; Oliveira,Líbia de Sousa Conrado; Silva,Flávio Luiz Honorato da. |
| The microbial protein bioconversion of cactus pear by yeast in solid medium was studied. Three cultivation variables used were: inoculum's concentrations (5, 10 and 15 %), substrate layer thickness (2, 4 and 6 cm) and temperature (30, 34 and 38 ºC). The rate of dry matter production and total protein were determined. Results obtained were variance analysis, gross energy and in vitro dry matter digestibility. The maximum protein amount achieved for the conditions studied in the present work was higher than 26 %, which was compatible or greater than those of conventional concentrates of protein supplements used for animal feed. The protein concentrate of cactus pear had a higher in vitro digestibility index (95.8 %) and did not show any changes in the gross... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protein enrichment; Solid-state fermentation; Cactus pear; Yeast. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400020 |
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| MEDRI,V.; PEREIRA,G. V.; LEONHARDT,J. H.. |
| Two hundred and forty 45-day-old fingerlings of Nile tilapia (Oreochromis niloticus), sexually reverted with an initial average weight of 1.25 ± 0.14 g, distributed in a totally casualized delineation, during 330 days. The effect of the substitution of 10%, 20% and 30% of the ration by distillery yeast (Saccharomiyces cerevisae) in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the choice of the yeast in the ration for these fishes depends on the availability and occasional cost. The yeast provides fish with good resistance to unfavorable environmental conditions, which could be verified since there were no statistical differences among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Oreochromis niloticus; Ration; Tilapia. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100014 |
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| Schmidt,M.; Cömer,A.; Grey,M.; Brendel,M.. |
| Yeast multi-copy vectors carrying the formaldehyde-resistance marker gene SFA have proved to be a valuable tool for research on industrially used strains of Saccharomyces cerevisiae. The genetics of these strains is often poorly understood, and for various reasons it is not possible to simply subject these strains to protocols of genetic engineering that have been established for laboratory strains of S. cerevisiae. We tested our vectors and protocols using 10 randomly picked baker's and wine yeasts all of which could be transformed by a simple protocol with vectors conferring hyperresistance to formaldehyde. The application of formaldehyde as a selecting agent also offers the advantage of its biodegradation to CO2 during fermentation, i.e., the selecting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Transformation; Hyperresistance to formaldehyde. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200004 |
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| Xie,X.X.; Ma,Y.F.; Wang,Q.S.; Chen,Z.L.; Liao,R.R.; Pan,Y.C.. |
| As an essential trace element, copper can be toxic in mammalian cells when present in excess. Metallothioneins (MTs) are small, cysteine-rich proteins that avidly bind copper and thus play an important role in detoxification. Yeast CUP1 is a member of the MT gene family. The aim of this study was to determine whether yeast CUP1 could bind copper effectively and protect cells against copper stress. In this study, CUP1 expression was determined by quantitative real-time PCR, and copper content was detected by inductively coupled plasma mass spectrometry. Production of intracellular reactive oxygen species (ROS) was evaluated using the 2',7'-dichlorofluorescein-diacetate (DCFH-DA) assay. Cellular viability was detected using the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Overexpression; Copper stress; Viability; ROS. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000700616 |
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| Matsuoka,H.; Suzuki,Y.; Iwahashi,H.; Arao,T.; Suzuki,Y.; Tamura,K.. |
| The aim of the present study was to examine the feasibility of DNA microarray technology in an attempt to construct an evaluation system for determining gas toxicity using high-pressure conditions, as it is well known that pressure increases the concentration of a gas. As a first step, we used yeast (Saccharomyces cerevisiae) as the indicator organism and analyzed the mRNA expression profiles after exposure of yeast cells to nitrogen gas. Nitrogen gas was selected as a negative control since this gas has low toxicity. Yeast DNA microarray analysis revealed induction of genes whose products were localized to the membranes, and of genes that are involved in or contribute to energy production. Furthermore, we found that nitrogen gas significantly affected the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA microarray; Yeast; Hydrostatic pressure; Gas pressure; Nitrogen gas. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000800016 |
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| Accorsini,Fábio Raphael; Mutton,Márcia Justino Rossini; Lemos,Eliana Gertrudes Macedo; Benincasa,Maria. |
| Biosurfactants are bioactive agents that can be produced by many different microorganisms. Among those, special attention is given to yeasts, since they can produce many types of biosurfactants in large scale, using several kinds of substrates, justifying its use for industrial production of those products. For this production to be economically viable, the use of residual carbon sources is recommended. The present study isolated yeasts from soil contaminated with petroleum oil hydrocarbons and assessed their capacity for producing biosurfactants in low cost substrates. From a microbial consortium enriched, seven yeasts were isolated, all showing potential for producing biosurfactants in soybean oil. The isolate LBPF 3, characterized as Candida antarctica,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Biosurfactants; Glycerol; Soybean oil. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100013 |
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| Gomes,Bruno Severo; Siqueira,Ana Beatriz Sotero; Maia,Rita de Cássia Carvalho; Giampaoli,Viviana; Teixeira,Edson Holanda; Arruda,Francisco Vassiliepe Sousa; Nascimento,Kyria Santiago do; Lima,Adriana Nunes de; Souza-Motta,Cristina Maria; Cavada,Benildo Sousa; Porto,Ana Lúcia Figueiredo. |
| Lectins are carbohydrate-binding proteins of non-imune origin. This group of proteins is distributed widely in nature and they have been found in viruses, microorganisms, plants and animals. Lectins of plants have been isolated and characterized according to their chemical, physical-chemical, structural and biological properties. Among their biological activities, we can stress its fungicidal action. It has been previously described the effect of the lectins Dviol, DRL, ConBr and LSL obtained from the seeds of leguminous plants on the growth of yeasts isolated from vaginal secretions. In the present work the experiments were carried out in microtiter plates and the results interpreted by both methods: visual observations and a microplate reader at 530nm.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Sensitivity; Lectins. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200042 |
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| Maldonade,Iriani R.; Rodriguez-Amaya,Delia B.; Scamparini,Adilma R. P.. |
| Sequential statistical methods were used to maximise carotenoid production by a strain of Rhodotorula mucilaginosa, isolated from the Brazilian ecosystem. Initially, a factorial 2(5-1) experimental design was used, and the variables were pH and the levels of glucose, yeast extract, MgSO4.7H2O and KH2PO4. The nitrogen source (yeast extract) was the most important variable in enhancing carotenoid production; MgSO4.7H2O and KH2PO4 had a negative influence. The initial pH had no significant effect on carotenoid and cell productions. We further investigated the effects of glucose and yeast extract effects, using a second-order central composite design (CCD) to optimise carotenoid production, which was adequately approximated with a full quadratic equation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fermentation; Torulene; Yeast; Response surface design; Rhodotorula mucilaginosa. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100012 |
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| Lopes,Mario Lucio; Paulillo,Silene Cristina de Lima; Godoy,Alexandre; Cherubin,Rudimar Antonio; Lorenzi,Marcel Salmeron; Giometti,Fernando Henrique Carvalho; Bernardino,Claudemir Domingos; Amorim Neto,Henrique Berbert de; Amorim,Henrique Vianna de. |
| ABSTRACT In the last 40 years, several scientific and technological advances in microbiology of the fermentation have greatly contributed to evolution of the ethanol industry in Brazil. These contributions have increased our view and comprehension about fermentations in the first and, more recently, second-generation ethanol. Nowadays, new technologies are available to produce ethanol from sugarcane, corn and other feedstocks, reducing the off-season period. Better control of fermentation conditions can reduce the stress conditions for yeast cells and contamination by bacteria and wild yeasts. There are great research opportunities in production processes of the first-generation ethanol regarding high-value added products, cost reduction and selection of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ethanol; Yeast; Fermentation; Distillery. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000500064 |
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| Abdelkarim,Mahdhi; Kamel,Chaieb; Fathi,Kammoun; Amina,Bakhrouf. |
| To evaluate the effect of two bacterial strains isolated from Artemia cysts and yeast (Candida utilis) on the survival, growth and total biomass production of its larvae, challenge tests were performed with Candida utilis, Pseudomonas stutzeri and Pasteurella haemolityca. In addition, a pathogenic strain of Vibrio alginolyticus was tested for comparative purposes. Pseudomonas stutzeri and Candida utilis have no impact on survival, but enhance growth and total biomass production of the larvae. However, we noted that Pasteurella haemolityca affect negatively Artemia larvae. The adhesion and antagonism assay demonstrates that Candida utilis and Pseudomonas stutzeri are fairly adherent and play an important role in the enhancement of the protection of Artemia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia; Probiotics; Adhesion; Yeast; Bacteria. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100017 |
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| Meneghin,Silvana Perissatto; Reis,Fabricia Cristina; Almeida,Paulo Garcia de; Ceccato-Antonini,Sandra Regina. |
| The ethanol production in Brazil is carried out by fed-batch or continuous process with cell recycle, in such way that bacterial contaminants are also recycled and may be troublesome due to the substrate competition. Addition of sulphuric acid when inoculum cells are washed can control the bacterial growth or alternatively biocides are used. This work aimed to verify the effect of chlorine dioxide, a well-known biocide for bacterial decontamination of water and equipments, against contaminant bacteria (Bacillus subtilis, Lactobacillus plantarum, Lactobacillus fermentum and Leuconostoc mesenteroides) from alcoholic fermentation, through the method of minimum inhibitory concentration (MIC), as well as its effect on the industrial yeast inoculum. Lower MIC... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorine dioxide; Bacteria; Yeast; Antibacterial agent; Alcohol; Fermentation. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000200026 |
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| Kadaifciler,Duygu Göksay; Ökten,Suzan; Sen,Burhan. |
| Studies on dental units (DUs) are conducted either for the prevention or the reduction of the density of bacterial contamination in dental unit waterlines (DUWLs). However, the existence of fungi in the these systems requires more attention. During dental treatment, direct contact with water contaminated with fungi such as Candida, Aspergillus, or inhalation of aerosols from high-speed drill may cause various respiratory infections, such as asthma, allergies, and wounds on mucose membranes, especially on immunocompromised patients and dentists. The aims of this study are to investigate the number and colonization of fungi in DUWLs in the city of Istanbul, Turkey. Water samples were collected from air-water syringes, high-speed drills, and inlet waters from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dental unit waterlines; Dental equipments; Filamentous fungi; Mycological contamination; Yeast. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300049 |
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| Registros recuperados: 75 | |
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