Abstract: Disclosed are methods and systems for hydrogen isotope exchange of organic molecules that can be carried out with no alteration in the chemical structure of the organic molecules. Methods can be utilized to incorporate a particular hydrogen isotope on an organic molecule (e.g., deuteration or tritiation) or to remove a particular hydrogen isotope from an organic molecule (e.g., detritiation).

Abstract: A nail guide mechanism, suitable for use with a wide variety of nail guns, having a mounting bracket to permit ready attachment and/or removal in the field. The guide mechanism, when mounted, is oriented about the channel defined by the nose of the nail gun. The guide mechanism includes a partially pre-compressed spring that induces a bias on a pivoting arm such that the arm is caused to protrude at least partially into the channel. The arm is thus positioned to continuously exert a force on the nails as they are driven down the channel past the arm. Because the spring is only partially pre-compressed, the positioning of the arm is responsive to changes in conditions inside the channel, such as when the head of a nail passes by the arm. The force exerted by the arm, under the influence of the spring, acts substantially along the radial axis of the nail, and is exerted on the nail during at least a portion of the time that the nail is being impelled by the driving mechanism of the nail gun.

Abstract: A nail guide mechanism, suitable for use with a wide variety of nail guns, having a mounting bracket to permit ready attachment and/or removal in the field. The guide mechanism, when mounted, is oriented about the channel defined by the nose of the nail gun. The guide mechanism includes a partially pre-compressed spring that induces a bias on a pivoting arm such that the arm is caused to protrude at least partially into the channel. The arm is thus positioned to continuously exert a force on the nails as they are driven down the channel past the arm. Because the spring is only partially pre-compressed, the positioning of the arm is responsive to changes in conditions inside the channel, such as when the head of a nail passes by the arm. The force exerted by the arm, under the influence of the spring, acts substantially along the radial axis of the nail, and is exerted on the nail during at least a portion of the time that the nail is being impelled by the driving mechanism of the nail gun.