: Secondary electron image of a. human hair with a nanowire loop sitting on it. The diameter of the nanowire is equivalent to. the scale in the shale picture to the left. The. hair is about 60,000 nanometers in diameter.
Allergies come in different forms, so not everyone who has a pollen allergy is allergic to tree pollen. A palm tree allergy is indicative of your bodyâs reduced immunity to pollen, which can sometimes be genetic. When your body comes into contact with tree pollen, it releases histamine, the aggravator of common allergy symptoms. There are certain types of palm trees that donât exhibit pollen, such as Phoenix palms, so it is always important to identify the differences before planting any new trees in your yard.
Tree pollen is a common cause of allergy symptoms, especially in the early spring. Here are some key facts about allergies to elm, oak, and other trees.ost trees release their pollen in the late winter or early spring. Tree pollens that trigger allergies tend to be very fine and powdery. The wind can carry them for miles. While pollen may be almost invisible, inhaling even small amounts can trigger allergy symptoms. Trees that often trigger allergies include: 1  Ash.