Abstract Biosurfactants are bio-based amphiphilic molecules with extensive applications in various industries. These eco-friendly alternatives possess numerous advantages over chemical surfactants. However, high production costs hinder market competitiveness of biosurfactants. Production synthetic surfactants range between $1-3/kg, while biosurfactants cost $20-25/kg. Principal challenges hinde...

conclusions the obtained results indicate that rsm is an effective method for the optimization of culture conditions for hes gene expression in e. coli. results a maximum rhes mrna level of 376.16% was obtained under the following conditions: 0.6 mm iptg, 7 hours post-induction time, and 0.9 cell density before induction. the level of rhes mrna was significantly correlated with post-induction t...

Acquiring accurate tire–pavement interaction information is crucial for pavement mechanical analysis and maintenance. This paper combines the tire finite element model (FEM) response surface methodology (RSM) to obtain analyze structure under different loading conditions. A set of experiments was initially designed through Box–Behnken design (BBD) method input output variables RSM calibration. ...

Tungstophosphoric acid (H3PW12O40) supported on silica-coated magnetite nanoparticles has been prepared and used as a heterogeneous catalyst (Fe3O4@SiO2@HPW) in the condensation of benzaldehyde (B) with glycerol (Gly) for production cyclic acetals. Physicochemical techniques, including scanning electron microscopy (SEM), transmission (TEM), Fourier-transform infrared spectrometry (FTIR), X-ray ...

Treatment of textile wastewater with domestic as co-substrate was investigated in this study. Combined and at different mixing ratios (100:0, 80:20, 60:40) treated under anaerobic reactor. The influence residence time, fraction initial pH were determined view COD color removal. Response Surface methodology (RSM) Box–Behnken design (BBD) employed to determine conditions for higher simultaneous r...

Lemongrass (Cymbopogon citratus) is one of the plants as source essential oils, which are widely used food and beverage flavors aromatherapy. This plant has great potential to be developed due low prices high planting power. The extraction oils from lemongrass generally still uses conventional methods water distillation or steam distillation, requires a long time (about 6 hours) get good qualit...

PURPOSE Benign breast disease (BBD) in women encompasses a broad spectrum of histopathologic lesions. Studies on BBD have focused on the risks for subsequent breast cancer associated with three broad categories of lesions, classified as nonproliferative, proliferative, or proliferative with atypia, without addressing the issue of the contribution of concurrent multiple BBD lesions. There is ver...

In the present study, adsorption of Co(tsPc)-4 using γ-Alumina was investigated. γ-Alumina was prepared by gel combustion method. The XRD pattern revealed that the synthesized γ-Alumina is amorphous and SEM image showed its nanosize scale while BET surface area about 501 m2/g and pore size of 7 nm implies highly porous surface which is a characteristic property of a high-quality adsorbent. In t...

fruit waste extract was selected as the sole substrate for carotenoid production and the effect of parameters like ph, temperature and agitation have been studied. a two-step simple sequential strategy was employed for the optimization of carotenoid production by rhodotorula rubra. in the first step, one factor at a time was employed to evaluate the impact of ph on carotenoid production. the ou...