Polarity of molecules is one of the central concepts that is used for predicting or rationalizing a wide array of concepts in the undergraduate chemistry curriculum. These concepts include the physical properties of molecules at the freshman level, structure-reactivity relationships in organic and ...
On attempting to correlate the electrical double-refraction (Kerr effect) of gases and vapours which has been measured by Leiser, Hansen and Szivessy, with the optical anisotropy of the molecules determined from observations on light-scattering, it is found that electrically polar molecules generally...
chemical bonding: The polarity of molecules As the difference in electronegativity between twocovalently bondedatoms increases, the dipolar character of the bond increases as the partial charges increase. When the electronegativities of the atoms are very different, the attraction of the more electroneg...
Cell Polarity: A Universal Feature of Development Cells, the basic units of life, develop into different forms such as spherical, cylindrical, and cubic. When distribution of subcellular structures and molecules generate asymmetry to mark one end of the cell distinct from the other, the resulting ...
C + 4H C H H H H or C H H H H ELECTRON SHARING IN THE METHANE (CH 4 ) MOLECULE BUILDING SIMPLE MOLECULES Among the simplest covalent compounds that the second row nonmetals can form are those that result from combination with hydrogen. Based on the number of electrons in their ...
a molecule may be polar or non-polar. a non-polar molecule has a structure of its atoms lined up in a way that the orbital electrons in the outer region cancel out the electronegativity. in general, pyramid-shaped and v-shaped molecules are said to be polar. whereas the linear molecules...
chemical bonding: The polarity of molecules As the difference in electronegativity between two covalently bonded atoms increases, the dipolar character of the bond increases as the partial charges increase. When the electronegativities of the atoms are very different, the attraction of the more electr...
In mesenchymal cell motility, several migration patterns have been observed, including directional, exploratory and stationary. Two key members of the Rho-family of GTPases, Rac and Rho, along with an adaptor protein called paxillin, have been particularly implicated in the formation of such migrati...
Human cone phototropism is a key mechanism underlying the Stiles-Crawford effect, a psychophysiological phenomenon according to which photoreceptor outer/inner segments are aligned along with the direction of incoming light. However, such photomechanical
Fill in the blank with correct word/s. In passive diffusion, solute molecules cross the membrane as a result of \rule{1in}{.2mm}. Why is diffusion not always able to meet the ion or molecule needs of the cell? Explain simple diffusion, facilitated diffusion, and...