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| Registros recuperados: 75 | |
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| Viana,Roberta Oliveira; Magalhães-Guedes,Karina Teixeira; Braga Jr.,Roberto Alves; Dias,Disney Ribeiro; Schwan,Rosane Freitas. |
| Abstract The aim of this study was to develop a kefir apple-based vinegar and evaluate this fermentation process using new methodology with Biospeckle Laser. Brazilian kefir grains were inoculated in apple must for vinegar production. In this study, the microbial community present in kefir, and correspondent vinegar, was investigated using Matrix Assisted Laser Desorption/Ionization - Time of Flight Mass Spectrometry (MALDI-TOF MS) technique. Saccharomyces cerevisiae, Lactobacillus paracasei, Lactobacillus plantarum, Acetobacter pasteurianus and Acetobacter syzygii were the microbial species identified. S. cerevisiae, L. plantarum, A. pasteurianus and A. syzygii were found in smaller quantities at the beginning of the alcoholic fermentation, but were found... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Saccharomyces; Lactobacillus; Apple; MALDI-TOF; Biospeckle Laser; Vinegar. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000300592 |
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| Paula,Daphine Ariadne Jesus de; Silva,Lívia Kmetzsch Rosa e; Staats,Charley Christian; Vainstein,Marilene H.; Joanoni,Ana Lúcia Pinto; Nakazato,Luciano; Dutra,Valéria. |
| Cryptococcus neoformans and C. gattii are pathogenic yeasts that cause life-threatening diseases in humans and animals. Iron is an essential nutrient for virtually every organism as it functions as a cofactor in numerous essential enzymatic reactions. In the literature, the competition for iron between microbes and mammalian hosts during infection is well documented. In this study, we used representational difference analysis (RDA) in order to gain a better understanding of how C. gattii responds to iron starvation. A total of 15 and 29 genes were identified as having altered expression levels due to iron depletion after 3 h and 12 h, respectively. Of these, eight genes were identified in both libraries. The transcripts were related to many biological... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryptococcus gattii; Iron; Representational difference analysis; Yeast. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300008 |
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| Gaensly,Fernanda; Picheth,Geraldo; Brand,Debora; Bonfim,Tania M.B.. |
| Yeasts can be enriched with microelements, including iron; however, special physicochemical conditions are required to formulate a culture media that promotes both yeast growth and iron uptake. Different iron sources do not affect biomass formation; however, considering efficacy, cost, stability, and compatibility with Saccharomyces cerevisiae metabolism, ferrous sulphate is recommended. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Saccharomyces cerevisiae; Iron uptake; Iron sources; Biomass formation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200016 |
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| Castillo-Castillo,Y.; Ruiz-Barrera,O.; Burrola-Barraza,M.E.; Marrero-Rodriguez,Y.; Salinas-Chavira,J.; Angulo-Montoya,C.; Corral-Luna,A.; Arzola-Alvarez,C.; Itza-Ortiz,M.; Camarillo,J.. |
| Abstract Solid-state fermentation can be used to produce feeds for ruminants, which can provide an enriched population of yeasts to improve ruminal fermentation. Fermentation of apple bagasse was performed to obtain a yeast-rich product, with the objective of isolating, identifying, and characterizing yeast strains and testing their capability to enhance in vitro ruminal fermentation of fibrous feeds. Yeasts were isolated from apple bagasse fermented under in vitro conditions, using rumen liquor obtained from cannulated cows and alfalfa as a fibrous substrate. A total of 16 new yeast strains were isolated and identified by biochemical and molecular methods. The strains were designated Levazot, followed by the isolate number. Their fermentative capacity was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apple bagasse; Ruminal; Fermentation; Yeast. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000400889 |
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| Weinacker,Daniel; Rabert,Claudia; Zepeda,Andrea B.; Figueroa,Carolina A.; Pessoa,Adalberto; Farías,Jorge G.. |
| Since the 1970s, the establishment and development of the biotech industry has improved exponentially, allowing the commercial production of biopharmaceutical proteins. Nowadays, new recombinant protein production is considered a multibillion-dollar market, in which about 25% of commercial pharmaceuticals are biopharmaceuticals. But to achieve a competitive production process is not an easy task. Any production process has to be highly productive, efficient and economic. Despite that the perfect host is still not discovered, several research groups have chosen Pichia pastoris as expression system for the production of their protein because of its many features. The attempt of this review is to embrace several research lines that have adopted Pichia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Heterologous expression system; Recombinant protein; Production; Scale up. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400004 |
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| Karimi,Maryam; Hassanshahian,Mehdi. |
| Abstract Phenol and phenolic compounds are environmental pollutants present in industrial wastewaters such as coal tar, oil refineries and petrochemical plants. Phenol removal from industrial effluents is extremely important for the protection of environment. Usually, phenol degradation is carried out by physicochemical methods that are costly and produce hazardous metabolites. Recently, phenol biodegradation has been considered. Yeasts are the most important phenol biodegraders. In this study, the phenol-degrading yeast from environmental samples (soil and wastewater) was isolated from the coking plant of Zarand, Kerman. Then total heterotrophic yeasts were counted. The soil samples had higher rates of yeast degrader, in comparison to wastewater samples.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodegradation; Coal tar; Coking plant; Yeast; Zarand. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000100018 |
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| Loureiro,Silvia Tereza Azedo; Cavalcanti,Maria Auxiliadora de Queiroz; Neves,Rejane Pereira; Passavante,José Zanon de Oliveira. |
| The aim of this work was to isolate and identify yeasts from sand and sea water collected in two beaches of Olinda, Pernambuco state, Brazil. Thirty two samples of both sand and water in both beaches were obtained in the dry (December 2000 and February 2001) and rainy (June and July 2001) seasons. Two hundred and ninety two strains of yeast were obtained, and they belonged to four genera and 31 species. Candida was the most prevalent genus. Candida catenulata, C. fenica, C. sake, Brettanomyces bruxelenses and Rhodotorula mucilaginosa were the most commonly found species in both beaches Bairro Novo and Casa Caiada. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Sand; Water; Beaches. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000400005 |
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| Mejía-Barajas,Jorge A.; Montoya-Pérez,Rocío; Salgado-Garciglia,Rafael; Aguilera-Aguirre,Leopoldo; Cortés-Rojo,Christian; Mejía-Zepeda,Ricardo; Arellano-Plaza,Melchor; Saavedra-Molina,Alfredo. |
| Abstract Stress tolerance is a key attribute that must be considered when using yeast cells for industrial applications. High temperature is one factor that can cause stress in yeast. High environmental temperature in particular may exert a natural selection pressure to evolve yeasts into thermotolerant strains. In the present study, three yeasts (Saccharomyces cerevisiae, MC4, and Kluyveromyces marxianus, OFF1 and SLP1) isolated from hot environments were exposed to increased temperatures and were then compared with a laboratory yeast strain. Their resistance to high temperature, oxidative stress, and antioxidant response were evaluated, along with the fatty acid composition of their cell membranes. The SLP1 strain showed a higher specific growth rate,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Increased temperature; Oxygen-derived free radicals; Thermotolerant. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000200326 |
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| Registros recuperados: 75 | |
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