In complex task domains, such as games, students may exceed their teachers. Such tasks afford diverse means to tradeoff one type of performance for another, combining task elements in novel ways to yield method variations and strategy discoveries that, if mastered, might produce large or small leaps in performance. For the researcher interested in the development of extreme expertise in the wil...

in the present study, seven isolates of haemophilus influenzae type b were cultured in four different media to compare growth rate and capsule production. four liquid media namely brain heart infusion broth (bhi), trypticase soy broth (tsb), mueller hinton broth (mhb) and gonococci broth (gc) with added supplements (1% hemoglobin, 1% isovitalex) were used. the growth was measured by colony coun...

The yield and properties of cellulose produced from bacterial fermentation of black tea broth (known as Kombucha) were investigated in this study. The tea broth was fermented naturally over a period of up to 8 days in the presence of sucrose. Tea broth with a sucrose concentration of 90 g/l produced highest yield of bacterial cellulose (66.9%). The thickness and yield of bacterial cellulose inc...

Background:  Magnetotactic bacteria are a heterogeneous group of Gram-negative prokaryote cells that produce linear chains of magnetic particles called magnetosomes, intracellular organelles composed of magnetic iron particles. Many important applications have been defined for magnetic nanoparticles in biotechnology, such as cell separation applications and  acting as carriers of enzymes, antib...

the effect of different carbon sources on bacterial cellulose production by gluconacetobacter xylinus (ptcc 1734) and two newly isolated strains (from vinegar) under static culture conditions was studied. the production of bacterial cellulose was examined in modified hestrin-shramm medium by replacing d-glucose with other carbon sources. the results showed that the yield and characteristics of ...

Chamomile is one of the most wide spread medicinal plant cultivated in Egypt. This work aimed at enhancement of blossoms and oil production of chamomile plants via biofertilization with PGPRs under organic farming system. In this study, 6 bacterial strains were applied using two different inoculation techniques. The first application method was throughout soaking the roots of seedlings in the b...

The purposes of the present study were to screen the ability of Aspergillus fumigatus to produce antibacterial compounds using different growth parameters namely, pH, temperature, agitation and time of fermentation and investigate the effect of the yield against bacterial isolates. A. fumigatus was isolated from arable lands in Sudan and identified macroscopically and microscopically. The pure ...

to study the effects of different levels of seed ageing and bacteria inoculation on yield of common bean at field conditions, an experiment was carried out as factorial arranged in rcbd design with three replications at research farm of university of tehran (karaj-iran) in 2012. treatments consisted of four levels of seed ageing (0 (control), 3, 6 and 9 days at 41°c and 90-100% relative humidit...