Public Domain Image. Diffusion is the tendency of molecules to spread into an available space. Without other outside forces at work, substances will diffuse from a more concentrated environment to a less concentrated environment.Passive transport is the diffusion of substances across a membrane.This is a spontaneous process and cellular energy is not expended. Molecules will move from where the substance is more concentrated to where it is less concentrated.ithout other outside forces at work, substances will diffuse from a more concentrated environment to a less concentrated environment. Passive transport is the diffusion of substances across a membrane. This is a spontaneous process and cellular energy is not expended.
Tweet. Today, people around the country will celebrate Juneteenth, the anniversary of the day (June 19, 1865) slaves in Texas learned that slavery had been outlawed. The news came two and a half years after President Abraham Lincoln had issued the Emancipation Proclamation.
Like elsewhere, in New Orleans African-Americans celebrate Juneteenth with barbecues and picnics, with family and church gatherings that strengthen community bonds. The 19th of June is known as Juneteenth, an African-American holiday begun at the end of slavery days. Its origins are Texan, not Louisianan, but Juneteenth has long had strong roots in the South and has since spread all over the country as a time for African-Americans to commemorate their freedom and accomplishments.