This work aimed to investigate the influence of selected material variables on self-cleaning and air purification efficiency in NOx pollutants cement-based photocatalytic composites. Tests were performed cement mortars, with seven independent considered: mass ratio between quartz powder sand, water ratio, total amount photocatalysts (two different types), content nanoparticulate silica, percent...

NASA's EPOXI mission observed the disc-integrated Earth and Moon to test techniques for reconnoitering extrasolar terrestrial planets, using the Deep Impact flyby spacecraft to observe Earth at the beginning and end of Northern Hemisphere spring, 2008, from a range of ∼1/6 to 1/3 AU. These observations furnish high-precision and high-cadence empirical photometry and spectroscopy of Earth, suita...

Objective(s): Pyocyanin is a blue-greenish redox-active pigment, produced by Pseudomonas aeruginosa, with a wide range of biological and biotechnological applications. Pyocyanin biosynthesis is regulated by the quorum-sensing (QS) system in which the expression of QS genes and QS-controlled virulence genes may be affected by serum as a complex medium. In the current study, effects of adult bovi...

The present study aimed to characterize melanin pigment extracted from Gluconobacter oxydans FBFS 97. After 14 days of culture at 28 °C in GY (glucose and yeast extract) liquid-state medium, G. FBFS97 produce the maximum melanin, up about 12–15 mg/L. physicochemical characteristics showed an ability dissolve 1 mol/L NaOH or KOH, insolubility water most organic solvents, such as chloroform petro...