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The critical functional groups of rifampicin in its inhibitory binding of bacterial RNA polymerase are the four critical hydroxyl groups of the ansa bridge and the naphthol ring, which form hydrogen bonds with amino acid residues on the protein. [40] Rifampicin is the 3-(4-methyl-1-piperazinyl)-iminomethyl derivative of rifamycin SV. [41]
In chemistry, a retort stand, also called a clamp stand, [1] a ring stand, [2] or a support stand, [3] is a piece of scientific equipment intended to support other pieces of equipment and glassware — for instance, burettes, test tubes and flasks. [4] The typical ring stand consists of a heavy base and a vertical rod, both usually made of metal.
β-Lactam antibiotics are indicated for the prevention and treatment of bacterial infections caused by susceptible organisms. At first, β-lactam antibiotics were mainly active only against gram-positive bacteria, yet the recent development of broad-spectrum β-lactam antibiotics active against various gram-negative organisms has increased their usefulness.
Iron rings used in a laboratory. An iron ring or ring clamp is an item of laboratory equipment which comprises a conjoined metal ring and radially-extending rod. [1] In some cases, the rod terminates in a screw clamp for attachment to a retort stand or other support; in others, the rod may be attached to a stand by means of a laboratory clamp holder. [2]
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The hope of a fixed-dose combination pill is to increase the likelihood that people will take all of three medications. [5] Also, if people forget to take one or two of their drugs, they might not then develop resistance to the remaining drugs.
It is influenced by traditional Chinese medicine. The other traditional medicine that is also practiced in Vietnam is traditional Chinese medicine (Trung Y), also known as Northern Herbology (Thuốc Bắc). [1] [2] Thuốc Nam is one of two kinds of folk remedies known to villagers, the other being the traditional exercise dưỡng sinh. [3] [4]
ISO 2852 Stainless steel clamp pipe couplings for the food industry [1] was an international standard that defines a non-permanent sanitary food-grade piping interconnect method, commonly used in the food processing industry and with dairy farm equipment.