Owing to the nature of this material, dimensions are nominal. HoneycombĪ cellular structure similar in appearance to natural honeycomb. Tolerances: Dimensions shown are nominal. In addition, the shape of a granule may vary from item to item. Granules may vary in size and, therefore, the dimensions stated are nominal. Pellets of an approximately regular shape. An additional charge may be made if we are able to supply LT foils. Foils less than 0.025mm are normally supplied NLT, however, if you require LT foils, please ask. Foils 0.025mm or more in thickness are supplied LT unless otherwise stated.
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Light Tight Foil: LT Foils are supplied without visible pinholes whereas NLT foils will normally contain pinholes, but may occasionally be free from pinholes. Where foils are supported they are indicated in the detailed item description. Due to their fragile nature, some foils are coated on one side with an acrylic or polyester support. Thin sheets of pure metal and metal alloys. Tolerances: Dimensions shown are nominal FoamĪ low density, permeable structure of cells and continuous ligaments offering a high surface area to volume ratio, and also a high strength to weight ratio. A maximum flake size is indicated, but individual flakes may vary greatly in size. TolerancesĪ non-metallic sheet material with a thickness =100mmįlat, irregularly shaped pieces of material. Yarns or tows consisting of several approximately parallel individual filaments, each filament usually being smaller in diameter than a monofilament. Woven fabrics are made by the regular interlacing of two arrays of yarns at right angles to each other, these being referred to as the warp and weft (see also Non-woven fabric) Tolerances TolerancesĪ vessel in which other materials may be heated or melted, usually at high temperatures. Tolerancesįibres cut into short lengths called cut, staple or chopped fibre. Bolts are available with different head styles and also in metric and inch-threaded sizes.
TolerancesĪ threaded pin that can be screwed into a nut or a tapped hole to fasten items together. These results not only expand our knowledge about the diversity and functions of DNA PT modification but also enhance our understanding of the known arsenal of defence systems.ĭepartment of Neurosurgery, Zhongnan Hospital, Wuhan University, Wuhan, China.A straight length of rectangular, square or oval section material. Strikingly, SspABCD coupled with SspE provides protection against phages in unusual ways: (1) SspE senses sequence-specific PTs by virtue of its PT-stimulated NTPase activity to exert its anti-phage activity, and (2) SspE inhibits phage propagation by introducing nicking damage to impair phage DNA replication. SspABCD confers single-stranded and high-frequency PTs with SspB acting as a nickase and possibly introducing nicks to facilitate sulfur incorporation. Here, we describe an unusual SspABCD-SspE PT system in Vibrio cyclitrophicus, Escherichia coli and Streptomyces yokosukanensis, which has distinct genetic organization, biochemical functions and phenotypic behaviour. We previously identified the Dnd system, which uses DndABCDE to insert sulfur into the DNA backbone as a double-stranded phosphorothioate (PT) modification, and DndFGH, a restriction component. Bacteria have evolved diverse mechanisms to fend off predation by bacteriophages.
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