As degranulation occurs, it causes the mast cell or basophil to release a series of chemicals that orchestrate the allergic reaction. Within every mast cell or basophil are 500 to 1500 granules containing more than thirty different allergy-causing chemicals.
Urban design is an inter-disciplinary subject that unites all the built environment professions, including urban planning, landscape architecture, architecture, civil and municipal engineering.
Integrated Ecological Design. Ecological design is defined by Sim Van der Ryn and Stuart Cowan as âany form of design that minimizes environmentally destructive impacts by integrating itself with living processesâ (Van der Ryn, Cowan S, 1996). Ecological design is an integrative ecologically responsible design discipline.