The following gold(I) and silver(I) complexes of the tritertiary phosphine 1,1,1- tris(diphenylphosphinomethyl)ethane, tripod , have been synthesised: Au(3)(tripod)X(3) [X = Cl(1), Br(2), I(3)]; [Au(3)(tripod)(2)Cl(2)]Cl (4); Au(tripod)X [X = Br(5), I(6)]; Ag(3)(tripod) (NO(3))(4) (7), Ag(tripod)NO(3) (8). They were characterized by X-ray diffraction (complexes 2, 3 and 4), (31)P NMR spectrosco...

Three groups of nondysfunctional adults were observed for atypical pencil grasps (i.e., nondynamic tripod grasps) used during functional writing situations: 58 occupational therapy students signing out equipment, 314 voters signing for their ballots, and 113 medical students taking a written examination. Among the total right-handed population, the most frequently used grasp was the dynamic tri...

We study the motion of a rotating tripod sliding over a smooth surface. The tripod is important and unique in that it is the only case where all aspects of the motion can be solved exactly. From the three constraint equations, we calculate the three normal forces and friction forces, which we then use to calculate the trajectory and other physical quantities of interest. We report novel results...

background accident investigation programs are a necessary part in identification of risks and management of the business process. objectives one of the most important features of such programs is the analysis technique for identifying the root causes of accidents in order to prevent their recurrences. analytical hierarchy process (ahp) was used to compare management oversight and risk tree (mo...

Macrobicyclic triphosphazides are able to reversibly exchange one of their tripodal components by means of a dynamic disassembly-reassembly process; surprisingly this strategy provides better yields of cage compounds than a direct tripod-tripod coupling.

BACKGROUND Foraging workers of grass-cutting ants (Atta vollenweideri) regularly carry grass fragments larger than their own body. Fragment length has been shown to influence the ants' running speed and thereby the colony's food intake rate. We investigated whether and how grass-cutting ants maintain stability when carrying fragments of two different lengths but identical mass. PRINCIPAL FIND...

Novel two-dimensional C3 symmetric (tripod) structures are fabricated from isobutenyl compounds possessing long alkyl chains. Alteration from tripod to wavy structures is accomplished by odd-even effect, and tandem Claisen rearrangement allows the transformation to the linear structures.

To escape danger or catch prey, running vertebrates rely on dynamic gaits with minimal ground contact. By contrast, most insects use a tripod gait that maintains at least three legs on the ground at any given time. One prevailing hypothesis for this difference in fast locomotor strategies is that tripod locomotion allows insects to rapidly navigate three-dimensional terrain. To test this, we co...