Spider silk spinning field, the spinneret apparatus of an adult "Araneus diadematus" (garden cross spider) consists of the glands shown below. Similar multiple gland architecture exists in the black widow spider. In order to artificially synthesise spider silk into fibres, there are two broad areas that must be covered. These are synthesis of the feedstock (the unspun silk dope in spiders), and synthesis of the spinning conditions (the funnel, valve, tapering duct, and spigot). There have been a number of different approaches. The molecular structure of unspun silk is both complex and extremely long. Though this endows the silk fibres with their
Garden centre UK counterparts. Many US garden centers have other departments including wild bird feeding, floral, gift, outdoor furniture and barbecue grills, home decor, landscape design, landscaping services and pet supplies. Most garden centers have a large Christmas department during the holiday season. Some garden centres have added a cafe or coffee bar, but not like the restaurants found in some European garden centres. Both of the largest home improvement stores in the US—Lowe's and The Home Depot—refer to their gardening departments as garden centers. Greenhouses are commonly part of a US garden center. Greenhouses protect the plants from late cold snaps,