Results: 135

Effect of nitrogen, carbon sources and agitation speed on acetoin production of Bacillus subtilis SF4-3

Electron. j. biotechnol; 19 (1), 2016
Background: Currently, microbial fermentation method has become the research hotspot for acetoin production. In our previous work, an acetoin-producing strain, Bacillus subtilis SF4-3, was isolated from Japanese traditional fermented food natto. However, its conversion of glucose to acetoin was relativel...

Ethanol induction of laccase depends on nitrogen conditions of Pycnoporus sanguineus

Electron. j. biotechnol; 18 (4), 2015
Background Ethanol has been pointed out as a laccase inducer. However, there are controversial reports about its efficiency with some fungi. In this study, we hypothesized that ethanol laccase induced in Pycnoporus sanguineus depends on nitrogen nutriment conditions. To prove this, we assessed laccase pr...

Cultivation of Scenedesmus dimorphus for C/N/P removal and lipid production

Electron. j. biotechnol; 18 (1), 2015
Background CO2 emission, water pollution and petroleum shortage are the issues coming with the development of industry. A cost effective system was constructed to fix the CO2 in flue gas (15% CO2), remove nitrogen and phosphorus from manure wastewater and produce biofuels at the same time. The significan...

Isolation and identification of a cellulolytic bacterium from the Tibetan pig's intestine and investigation of its cellulase production

Electron. j. biotechnol; 17 (6), 2014
Background The Tibetan pig is a pig breed with excellent grazing characteristics indigenous to the Qinghai-Tibet plateau in China. Under conditions of barn feeding, 90% of its diet consists of forage grass, which helps meet its nutritional needs. The present study aimed to isolate and identify a cellulol...

Severidade da antracnose e produtividade de sorgo granífero em resposta a doses crescentes de nitrogênio

Biosci. j. (Online); 30 (4), 2014
O presente estudo objetivou avaliar a severidade da antracnose e a produtividade de diferentes genótipos de sorgo em resposta a doses crescentes de nitrogênio. Os experimentos foram conduzidos em duas safras agrícolas: safra 2009/2010 (safra I) e safra 2010/2011 (safra II). O preparo do solo na área ...

The ICY1 gene from Saccharomyces cerevisiae affects nitrogen consumption during alcoholic fermentation

Electron. j. biotechnol; 17 (4), 2014
Background Saccharomyces cerevisiae is the main microorganism responsible for alcoholic fermentation. In this process, the consumption of nitrogen is of great importance since it is found in limiting quantities and its deficiency produces sluggish and/or stuck fermentations generating large economic loss...

Optimization of Bacillus subtilis cell growth effecting jiean-peptide production in fed batch fermentation using central composite design

Electron. j. biotechnol; 17 (3), 2014
Background Optimization of nutrient feeding was developed to improve the growth of Bacillus subtilis in fed batch fermentation to increase the production of jiean-peptide (JAA). A central composite design (CCD) was used to obtain a model describing the relationship between glucose, total nitrogen, and th...

Influence of rootstocks on growth, yield, fruit quality and leaf mineral element contents of pear cv. 'Santa Maria' in semi-arid conditions

Biol. Res; 47 (), 2014
BACKGROUND: Rootstocks play an essential role to determining orchard performance of fruit trees. Pyrus communisand Cydonia oblonga are widely used rootstocks for European pear cultivars. The lack of rootstocks adapted to different soil conditions and different grafted cultivars is widely acknowledged in ...

Medium optimization for palmarumycin C13 production in liquid culture of endophytic fungus Berkleasmium sp. Dzf12 using response surface methodology

Electron. j. biotechnol; 16 (6), 2013
Background: Berkleasmium sp. Dzf12, an endophytic fungus from Dioscorea zingiberensis, was a high producer of palmarumycin C13 with various bioactivities. In the present study, the experimental designs based on statistics were employed to evaluate and optimize the medium for palmarumycin C13 production i...

Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa

Electron. j. biotechnol; 16 (6), 2013
Background: The fermentation substrate efficiency of glucose supplemented with guava seed flour (GGSF) or glucose supplemented with dry Aspergillus niger mycelium (GANM) was evaluated during the production of biomass and antimicrobial compounds by the lactic acid bacteria Weissella confusa. Results: The ...