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21st-century hunting compound crossbow. A crossbow is a ranged weapon using an elastic launching device consisting of a bow-like assembly called a prod, mounted horizontally on a main frame called a tiller, which is hand-held in a similar fashion to the stock of a long gun. Crossbows shoot arrow-like projectiles called bolts or quarrels.
The small caliber rounds are perfect for killing animals like birds and rats. Being a crossbow, it does not produce much sound. Even though more powerful weapons were invented, like the air gun, the bullet-shooting crossbow was used extensively throughout history because it was not loud enough to scare prey off. [7]
Trellis in the courtyard of the Wernberg monastery, Wernberg, Carinthia, Austria. A trellis (treillage) is an architectural structure, usually made from an open framework or lattice of interwoven or intersecting pieces of wood, bamboo or metal that is normally made to support and display climbing plants, especially shrubs. [1]
Benzalkonium chloride (BZK, BKC, BAK, BAC), also known as alkyldimethylbenzylammonium chloride (ADBAC) and by the trade name Zephiran, [1] is a type of cationic surfactant. It is an organic salt classified as a quaternary ammonium compound. ADBACs have three main categories of use: as a biocide, a cationic surfactant, and a phase transfer agent ...
Triton X-100 (C 14 H 22 O(C 2 H 4 O) n) is a nonionic surfactant that has a hydrophilic polyethylene oxide chain (on average it has 9.5 ethylene oxide units) and an aromatic hydrocarbon lipophilic or hydrophobic group. The hydrocarbon group is a 4-(1,1,3,3-tetramethylbutyl)-phenyl group.
When it is used vertically to provide support to the vegetable trellis, the netting is fastened to a line of posts or supports (metal, bamboo or wood) distanced from 1.5 to up to 8 meters (depending to the type of crop, soil type, climate etc.) where the furrow ends have posts that are larger and stronger and preferably have a tension string or ...
Polyvinyl alcohol (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer.It has the idealized formula [CH 2 CH(OH)] n.It is used in papermaking, textile warp sizing, as a thickener and emulsion stabilizer in polyvinyl acetate (PVAc) adhesive formulations, in a variety of coatings, and 3D printing.
3 / 8 S 8 + 2 H 2 O + 6 OH − → 2 S 2− + SO 2− 3 + 5 H 2 O. and after simplification, or more exactly recycling, of water molecules in the above reaction: 3 / 8 S 8 + 6 OH − → 2 S 2− + SO 2− 3 + 3 H 2 O. adding back 6 Ca 2+ cations from hydrated lime for the sake of electroneutrality, one obtains the global reaction.