This definition is also often useful: sometimes it is not possible to observe whether two organisms interbreed (e.g., different types of whales in the wild) but examining their physical features can help determine how closely they're related.
Because there is no colour or transmission contrast in such an object, it is not possible to observe the structure using a conventional optical microscope.
Because of small size and complex structure of labyrinth-channel used in most drip emitters, it is not possible to observe the flow behavior of water passing through the channel.
A preliminary study based both on thermodynamic and experimental data showed that it is not possible to observe the Nd III)/Nd(0) system in LiF KF and LiF NaF melts; because the K+ and Na+ cation reduction waves hide the Nd3+ reduction wave.
In Morocco, while volumes have declined in 2009 and 2010, it is not possible to observe a phenomenon of collapse.
Gradual change, like the change from dry toilets to water closets, has a significant impact, but it is not rapid as it is not possible to observe the change and adapt to it.
Although it is possible that a business goes bust and one instantly starts up a new one, this phenomenon is not possible to observe using the BHPS so transitions within specific self-employment states are not reported.
However, it is not possible to observe a clear tendency of the PL intensity with respect to the current density and the solvent used.All colloidal solutions under UV light show bright green and violet PL emission.
The limitation with experimental models is that it is not possible to observe internal stress, while FEA models have the disadvantage that it is required to confirm the agreement of the results with those obtained from the oral cavity of the living body.
In the light of the aforementioned findings and interpretations, it can be predicted that unless excitation energy is much higher than the electronic transition of constituent semiconductors, GaAs and Ga x In1 − xN y As1 − y, in the sample, it is not possible to observe vibrational modes.
