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The most common type in Canada and the United States is a three-ring system for letter size pages (8 + 1 ⁄ 2 by 11 inches or 220 mm × 280 mm), whose size is similar to ISO 216-based A4 size. A standard 8 + 1 ⁄ 2 by 11 inches (220 mm × 280 mm) sheet of paper has three holes with spacing of 4 + 1 ⁄ 4 inches (110 mm).
Pearling or genital beading is a form of body modification, the practice of permanently inserting small beads made of various materials beneath the skin of the genitals—of the labia, or of the shaft or foreskin of the penis. As well as being an aesthetic practice, this is usually intended to enhance the sexual pleasure of partners during ...
Ringolevio. Ringolevio (also spelled ringalevio or ring-a-levio) [1] is a children's game which originated in the streets of New York City, where it is known to have been played at least as far back as the late 19th century. [2][3][a] It is one of the many variations of tag. [4] In Canada, the game is known as Relievio, a name which was also ...
A secret decoder ring (or secret decoder) is a device that allows one to decode a simple substitution cipher—or to encrypt a message by working in the opposite direction. [ 1 ] As inexpensive toys, secret decoders have often been used as promotional items by retailers, as well as radio and television programs, from the 1930s through to the ...
The Büchner–Curtius–Schlotterbeck reaction used to insert a methylene bridge between a halogen and a cabonyl carbon of an acyl halide. It is possible to isolate nitrogen-containing compounds using the Büchner–Curtius–Schlotterbeck reaction. For example, an acyl-diazomethane can react with an aldehyde in the presence of a DBU catalyst ...
HFMD often causes a fever, flu-like symptoms, low appetite, and painful swallowing. A rash with the following characteristics appears around the same time. Small red or dark spots or blisters on ...
Free algebra. In mathematics, especially in the area of abstract algebra known as ring theory, a free algebra is the noncommutative analogue of a polynomial ring since its elements may be described as "polynomials" with non-commuting variables. Likewise, the polynomial ring may be regarded as a free commutative algebra.
t. e. In algebra, ring theory is the study of rings [1] — algebraic structures in which addition and multiplication are defined and have similar properties to those operations defined for the integers. Ring theory studies the structure of rings, their representations, or, in different language, modules, special classes of rings (group rings ...