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The beads are compared with the testicles of the patient, and the volume is read off the bead which matches most closely in size. Prepubertal sizes are 1–3 ml, pubertal sizes are considered 4 ml and up and adult sizes are 15-25 ml. [2] The orchidometer can be used to accurately determine size of testes.
Not every 20 inch strand of size 11/0 beads weighs the same. However, there are some online calculators, which can be used for conversion from hanks to grams and from grams to hanks. A hank of size 2/0 bugles or size 11/0 seed beads generally weighs between 30 and 40 grams, depending on manufacturing variations, coatings or linings.
ISO 5775 is an international standard for labeling the size of bicycle tires and rims. The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO). It is designed to make tire sizing consistent and clear.
Available forms include anion and cation exchangers, as well as gel filtration resins, with varying degrees of porosity; bead sizes fall in discrete ranges between 20 and 300 μm. Sephadex is also used for ion-exchange chromatography. [3] Sephadex is crosslinked with epichlorohydrin. [4]
Most glass beads (but not all) are manufactured with a hole that is 1 mm in size. This will accommodate 20-gauge wire, but will probably not accommodate 18-gauge wire. Some glass beads, almost all freshwater pearls and some gemstone beads will have smaller holes and will require the use of wire thinner than 20-gauge.
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