61.   A mathematical model of fluid convection under microgravity conditions is considered.

62.   Organic arsenicals and As(III) were the most phytotoxic species to both marsh grasses when plant growth was considered.

63.   In this paper the topological structure and properties for PM-space are considered.

64.   The excitation of a phase transient grating induced by two equal pulses from the same laser, which intersect in a nonlinear (cubic) medium, is considered theoretically.

65.   Some possible applications of the induced grating are considered.

66.   However, removal of iron and MgO by these methods is not considered feasible on economic grounds.

67.   The interaction of electrons with acoustic phonons is considered in a nanotube with chiral symmetry placed in a magnetic field parallel to the nanotube axis.

68.   Simplices that are close to a regular tetrahedron or quartoctahedron (quarter of an octahedron) are considered.

69.   The problem of gassy liquid flow through a porous medium is considered theoretically.

70.   Uniaxial single elements in uniaxial orienting force field are considered.