Cooking and purifying the base. 3 Next, the gum base is cooked in kettles at 243 degrees Fahrenheit (116 degrees Celsius) until it has melted into a thick syrup. To purify it, workers pass it through screens and place it in a high speed centrifuge before refiltering it, this time through finer screens.
When tomato leaves curl due to viral infections, you'll usually see other symptoms. Tomato plant leaves are sensitive to some viral diseases that cause the leaves to curl. These viruses affect the plantâs appearance and also reduce fruit yield and quality. If the only symptom is curled leaves, your tomato plant might have a condition known as physiological leaf roll.
f the leaves on your vegetable plants are. twisted or curled, the problem could be. environmental, chemical, or biological. Sometimes all the leaves on a plant are twisted. or curled; sometimes only new growth has. symptoms while older leaves are normal. Damage may start moderately then quickly. begin to affect new growth. Damage to tomato. and other vegetable plants may have one or a. combination of causes (Figs.