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In the metric system, the mass per unit area of all types of paper and paperboard is expressed in terms of grams per square metre (g/m 2). This quantity is commonly called grammage in both English and French , [ 2 ] though printers in most English-speaking countries still refer to the " weight " of paper.
Machine-finished coated paper (MFC) has a basis weight of 48–80 g/m 2.They have good surface properties, high print gloss and adequate sheet stiffness. MFC papers are made of 60–85% groundwood or thermomechanical pulp (TMP) and 15–40% chemical pulp with a total pigment content of 20–30%.
For example, Melitta uses up to 60% of bambus in their filters since 1998. [3] Both bleached and unbleached qualities are made. [1]: 114 Coffee filters are made in different shapes and sizes to fit into different holders. Most notable are the (paper) coffee filter systems introduced by Melitta (1908, 1932, 1936, 1965), Chemex (1941) and Hario ...
N 2 F 4 ⇌ 2 •NF 2. At room temperature N 2 F 4 is mostly associated with only 0.7% in the form of NF 2 at 5mm Hg pressure. When the temperature rises to 225 °C, it mostly dissociates with 99% in the form of NF 2. [6] The energy needed to break the N−N bond in N 2 F 4 is 20.8 kcal/mol, with an entropy change of 38.6 eu. [6]
C-19 [9] One gram is thus approximately equivalent to 15.432 36 grains. [6]: C-13 The unit formerly used by jewellers to measure pearls, diamonds, and other precious stones, called the jeweller's grain or pearl grain, is equal to 1 ⁄ 4 carat (50 mg; 0.77 gr). [5] The grain was also the name of a traditional French unit equal to 53.115 mg. [5]
Chinese paper folding, or zhezhi (), is the art of paper folding that originated in medieval China.. The work of 20th-century Japanese paper artist Akira Yoshizawa widely popularized the Japanese word origami; however, in China and other Chinese-speaking areas, the art is referred to by the Chinese name, zhezhi.
A high vaginal swab (HVS) is a medical procedure performed in obstetrics and gynaecology to test vaginal discharge for the presence of vaginal thrush, bacterial vaginosis and trichomonas vaginalis. [1] [2] [3] It is carried out in clean conditions, by a healthcare professional who uses a speculum to look at the cervix and vagina.