Take 80 ml of water in the beaker. Add 10 gms of baking soda and 2-3 drops of soap in the water and stirr well. Cut the holes in the spinach leaves using straw and put them inside the syringe by taking the plunger out. Now take the solution into the syringe. Pull the plunger upward by creating the vacuum repeeat the same 2-3 times.Now empty the syringe into the same beaker containing the solution. And keep it in presence of lamp for 15-20 minutes. Afte that observe the leaves.