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  2. Filter paper - Wikipedia

    en.wikipedia.org/wiki/Filter_paper

    The filter papers are transformed into filter cartridges, which then is fitted to a holder. The construction of the cartridges mostly requires that the paper is stiff enough to be self-supporting. A paper for air filters needs to be very porous and have a weight of 100–200 g/m 2. Normally particularly long fibrous pulp that is mercerised is ...

  3. Paper recycling - Wikipedia

    en.wikipedia.org/wiki/Paper_recycling

    While paper is the most commonly recycled material (68.2 percent of paper waste was recovered in 2018, up from 33.5 percent in 1990) [31] [33] it is being used less overall than at the turn of the century. [34] As of 2018, paper accounted for a third of all recyclables collected in the US, by weight. [32]

  4. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    ±2 mm (0.079 in) for any dimension above 600 mm (24 in). There used to be a standard, DIN 198, that was just a table of recommended A series formats for a number of business applications. The 1976 edition of this standard introduced a size 2 ⁄ 3 A4 198 mm × 210 mm and suggested it for some forms and slips. [citation needed]

  5. Tzanck test - Wikipedia

    en.wikipedia.org/wiki/Tzanck_test

    53.1 - 86% sensitive and 100% specific Hand, foot and mouth disease: Syncytial nuclei, absence of acantholytic cells 1: 72% sensitive and 100% specific Human papillomavirus infections: Koilocytes 75% sensitive and 100% specific Molluscum contagiosum: Intracytoplasmic inclusion bodies (“Henderson-Patterson’s bodies”) Milker’s nodule and orf

  6. Postcard - Wikipedia

    en.wikipedia.org/wiki/Postcard

    In the early 1930s, cartoon-style saucy postcards became widespread, and at the peak of their popularity the sale of saucy postcards reached 16 million a year. They were often bawdy in nature, making use of innuendo and double entendres , and traditionally featured stereotypical characters such as vicars, large ladies, and put-upon husbands, in ...

  7. Respiratory syncytial virus - Wikipedia

    en.wikipedia.org/wiki/Respiratory_syncytial_virus

    RSV has a negative-sense, single-stranded RNA genome. [2] The genome is linear and approximately 15,000 nucleotides in length. [3] It has 10 genes encoding for 11 proteins. [2] [4] The gene order is NS1-NS2-N-P-M-SH-G-F-M2-L, with the NS1 and NS2 gene serving as nonstructural promoter genes. [35] Electron micrograph of RSV particle, which has ...