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Nisin is a polycyclic antibacterial peptide produced by the bacterium Lactococcus lactis that is used as a food preservative.It has 34 amino acid residues, including the uncommon amino acids lanthionine (Lan), methyllanthionine (MeLan), didehydroalanine (Dha), and didehydroaminobutyric acid (Dhb).
The resulting watermark is generally much clearer and more detailed than those made by the Dandy Roll process, and as such, Cylinder Mould Watermark Paper is the preferred type of watermarked paper for banknotes, passports, motor vehicle titles, and other documents where it is an important anti-counterfeiting measure.
The Nicaraguan passport (Spanish: Pasaporte nicaragüense) is issued to citizens of Nicaragua for international travel. As of 1 January 2017, Nicaraguan citizens had visa-free or visa on arrival access to 112 countries and territories, ranking the Nicaraguan passport 46th in terms of travel freedom (tied with Marshallese passport) according to the Henley visa restrictions index.