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2. Clamp holder - Wikipedia

   en.wikipedia.org/wiki/Clamp_holder

   Using a clamp holder to hold clamps at different angles. A retort stand rod and clamp are inserted into two jaws of a clamp holder and adjustable thumbscrews fasten the clamp holder to the attachments and lock it in place. The attachments can be secured with the thumbscrews to be positioned at any height or angle, with a regular clamp holder ...

3. Retort stand - Wikipedia

   en.wikipedia.org/wiki/Retort_stand

   In chemistry, a retort stand, also called a clamp stand, [1] a ring stand, [2] or a support stand, [3] is a piece of scientific equipment intended to support other pieces of equipment and glassware — for instance, burettes, test tubes and flasks. [4] The typical ring stand consists of a heavy base and a vertical rod, both usually made of metal.

4. Utility clamp - Wikipedia

   en.wikipedia.org/wiki/Utility_clamp

   A utility clamp is a laboratory apparatus resembling a pair of scissors. The screw in the middle works as the wide adjustment of 2-prong. [1] It is composed of 3 parts: 2-prong adjust, metal rod, and clamp down (the clamp is attached to the ring stand for adjusting the height). This apparatus is connected to a ring stand or retort stand.

5. Iron ring (laboratory) - Wikipedia

   en.wikipedia.org/wiki/Iron_ring_(laboratory)

   Iron rings used in a laboratory. An iron ring or ring clamp is an item of laboratory equipment which comprises a conjoined metal ring and radially-extending rod. [1] In some cases, the rod terminates in a screw clamp for attachment to a retort stand or other support; in others, the rod may be attached to a stand by means of a laboratory clamp holder. [2]

6. Ramachandran plot - Wikipedia

   en.wikipedia.org/wiki/Ramachandran_plot

   Because dihedral angle values are circular and 0° is the same as 360°, the edges of the Ramachandran plot "wrap" right-to-left and bottom-to-top. For instance, the small strip of allowed values along the lower-left edge of the plot are a continuation of the large, extended-chain region at upper left.

7. Round-bottom flask - Wikipedia

   en.wikipedia.org/wiki/Round-bottom_flask

   Because of the round bottom, cork rings are needed to keep the round bottom flasks upright. When in use, round-bottom flasks are commonly held at the neck by clamps on a stand. A round-bottom flask is featured prominently on the logo of the OPCW, the implementing body for the Chemical Weapons Convention. [2]