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Various items in Aomori Prefecture featuring kogin-zashi patterns. Kogin-zashi (こぎん刺し) is one of the techniques of sashiko, or traditional Japanese decorative reinforcement stitching, that originated in the part of present-day Aomori Prefecture controlled by the Tsugaru clan during the Edo period (1603-1867).
Many sashiko patterns were derived from Chinese designs, but just as many were developed by native Japanese embroiderers; for example, the style known as kogin-zashi, which generally consists of diamond-shaped patterns in horizontal rows, is a distinctive variety of sashiko that was developed in Aomori Prefecture.
Ammonium bifluoride, as its name indicates, contains an ammonium cation ([NH 4] +), and a bifluoride (or hydrogen difluoride) anion ([HF 2] −).The triatomic bifluoride anion features a strong three-center four-electron bond (specifically, a symmetrical hydrogen bond) with a bond energy greater than 155 kJ/mol, [2] and an H-F length of 114 pm. [3]
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The bifluoride ion has a linear, centrosymmetric structure (D ∞h symmetry), with an F−H bond length of 114 pm. [1] The bond strength is estimated to be greater than 155 kJ/mol. [2] In molecular orbital theory, the atoms are modeled to be held together by a 3-center 4-electron bond (symmetrical hydrogen bond), [3] in a sort of hybrid between a hydrogen bond and a covalent bond.
A Long Island farm will reportedly euthanize more than 100,000 ducks after a bird flu outbreak hit the eastern New York facility.. Staff at the Crescent Duck Farm in Aquebogue, New York, noticed ...
The FLOSS Manuals (FM) is a non-profit foundation founded in 2006 by Adam Hyde and based in the Netherlands. The foundation is focused on the creation of quality documentation about how to use free software. Its web site is a wiki (previously using the TWiki and Booki programs, now using Booktype) focused on the collaborative authoring of manuals.
The term is derived from the Japanese term "boroboro", meaning something tattered or repaired. [2] The term 'boro' typically refers to cotton, linen and hemp materials, mostly hand-woven by peasant farmers, that have been stitched or re-woven together to create an often many-layered material used for warm, practical clothing.