The opsin made from the OPN1SW gene is more sensitive to light in the blue/violet part of the visible spectrum (short-wavelength light), and cones with this pigment are called short-wavelength-sensitive or S cones. Genetic changes involving the OPN1LW or OPN1MW gene cause red-green color vision defects.
Wood panel fencing â sometimes called stockade fencing â improves privacy and security and is a good choice for setting boundaries for children and pets. Individual components â boards and rails â and prebuilt panels come in sections 4 to 6 feet tall and 6 or 8 feet long. There are two basic types of panels: 1  The boards on a solid panel fence butt against each other. 2  Shadowbox panels, right, use alternating boards on each side of the fence rail to give the fence the same look on both sides, allow air circulation and provide partial views.
Rural Fencing. Rural fences are often used as an economical means of fencing in livestock. Rural fencing can be used to fence both large-scale farms and small acreage blocks, and may also be used to bring a rural look to a town block. Rural Fences are usually used to control the movement of animals, people and vehicles.A rural fence can indicate a property boundary, used for Livestock control as well as preventing access to people or animals. There are many types of rural fences for different situations.These rural fences include: 1  Barbed wire fence: Barbed wire can help in containing animals such as cattle. 2  Sometimes barbed wire is used as well as plain wire in a fence.here are many types of rural fences for different situations. These rural fences include: 1  Barbed wire fence: Barbed wire can help in containing animals such as cattle. 2  Sometimes barbed wire is used as well as plain wire in a fence.