Abstract: An example of a flow cell includes a substrate; a first primer set attached to a first region on the substrate, the first primer set including an un-cleavable first primer and a cleavable second primer; and a second primer set attached to a second region on the substrate, the second primer set including a cleavable first primer and an un-cleavable second primer.

Abstract: An example of a flow cell includes a substrate and a reaction area defined in or over the substrate. The reaction area includes two angularly offset and non-perpendicular surfaces relative to a planar surface of the substrate, a polymeric hydrogel positioned over at least a portion of each of the two angularly offset and non-perpendicular surfaces; a first primer set attached to the polymeric hydrogel that is positioned over the portion of a first of the two angularly offset and non-perpendicular surfaces; and a second primer set attached to the polymeric hydrogel that is positioned over the portion of a second of the two angularly offset and non-perpendicular surfaces, wherein the first and second primer sets are orthogonal.

Abstract: A combination knapsack including a mat permanently attached to one of the walls of a main storage compartment and a flap permanently attached to another of the walls of the main storage compartment. In a storage mode of use, the mat is completely retained within the main storage compartment of the knapsack and the flap covers the opening to the main storage compartment. In an operational mode of use, the mat is fully extended outside the knapsack and the flap is either on the knapsack or on the mat to be used as a headrest or pillow. In another embodiment, the knapsack further comprises a blanket that may be closed about the legs of the wearer in a sitting position and an insulating handwarming muff.