Bitterness can be caused by too little water, but often the bitterness can be inherited from the parent plant. Never save the seeds of a bitter lettuce. Also, some varieties are more prone to producing the occasional bitter-tasting lettuces.
wrap it up and throw it in the fridge
The lettuce does not turn brown due to it being cut with a metal knife. It turns brown due to oxidation.
if it is rubbery and brown
KumaraSweet PotatoAubergine/Egg PlantPotatoYou can prevent most of these from going brown by placing them under water.
if you are you going to eat it. then yes. it will bruise the lettuce.
Sometimes it is--chemicals can be added to prevent discoloration.
IS THERE IRON IN LETTUCE? No there isn't iron in brown lettuce because it is rotten. When it is rotten the iron appears to escape from the lettuce because the lettuce is no longer fresh enough to eat.
The plural of lettuce can be lettuceor lettuces e.g.The farmer grew lettuce for a livingI bought two heads of lettuce from the shopThis effect was not observed in glasshouse-grown lettuces where similar varieties are grown all year round.The first red oak leaf lettuces from River Nene Organic Farm are now going into the boxes along with wet garlic.Both variants are interchangeable
Iceberg lettuce changes color because of enzymes. When lettuce is cut, enzymes from cells are released. One enzyme, polyphenoloxidase, reacts with polyphenol molecules in the lettuce, forming brown pigments.
Because it's brown, or bad.
Not as far as nutritional value. Lettuce that is torn doesn't turn brown as fast though.
Silver nitrate is slightly photosensitive. In order to prevent it from under going decomposition or maintain its self properties it is stored in brown bottles.
You just cut that leaf off, hope it helped! X