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Modified Christoffel equations are derived for three-dimensional wave propagation in a general viscoelastic anisotropic medium under initial stress.
Similar results were obtained by Elnagar and Abd-Alla [23], the former deriving the constitutive equation for Rayleigh waves in an elastic medium under initial stress, and the latter deriving the constitutive equation for thermoelastic problems in an infinite cylinder under initial stress.
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Mahmoud [11], [12] investigated the analytical solution for an electrostatic potential on wave propagation modeling in human long wet bones, and they studied the influence of rotation and generalized magneto-thermo-elastics on Rayleigh waves in a granular medium under the effect of initial stress and a gravity field.
Arabitol production by D. hansenii SBP-1 was then investigated under different conditions, and a yield of 0.5 g/g glycerol consumed was attained with 150 g/L crude glycerol in the initial culture medium under aerobic conditions at 30°C.
The percentage of carbon assimilation upon growth on various substrates was determined in batch cultures that were incubated in custom made 1200 ml serum bottles filled with 830 ml of anoxic medium under air atmosphere resulting in an initial oxygen concentration of approx. 6 vol%.
Pre-inoculum of yeasts carrying Y2JADH-AMY1, Y2JPGK-AMY1, Y2SPGK-AMY1 and Y2SPGK-AMY1 plasmids were grown in MD medium for 24 h, 30 °C, 300 rpm agitation, and inoculum were made in 50 mL MD medium with initial OD600 of 0.25 and grown under the same conditions.
Yeast cells were grown in MD medium for 24 h at 30 °C under 200 rpm agitation and inoculated in 250 mL MD medium with initial OD600 of 0.25 following grown until an OD600 ~ 0.8.
When cultures reached exponential growth phase, they were inoculated into the same prewarmed, fresh medium under the same substrate conditions at an initial optical density at 600 nm (OD600nm) of 0.1.
under initial conditions.
Kinetic experiments were performed under initial linear rate conditions.
It was found that the level of pigment expression in cultures grown under dim light in SMFC medium at an initial oxygen tension of 6 vol% was quite stable and ranged between 0.85 and 0.88 (A880 nm/A660 nm values in stationary phase), so that preparatory cultures were routinely obtained by subcultivation in this medium.
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