Quark (dairy product) 6.1). Acidification allowed to continues until the pH reaches around 4.6, at which acidity level the casein proteins in the milk begins to precipitate. In Germany, the curd is continuously stirred to prevent it from getting hard, resulting in a thick, creamy texture. According to German regulations on cheese ("Käseverordnung"), "fresh cheeses" ("Frischkäse") such as quark or cottage cheese must contain at least 73% water in the fat-free component. German quark is usually sold in plastic tubs with most or all of the whey. This type of quark has the firmness of sour cream but is slightly drier, resulting in
Quark Expeditions Quark Expeditions Quark Expeditions is an expedition travel company. The company offers Polar Region expeditions aboard purpose-built expedition ships and icebreakers and on land-based trips. Quark Expeditions was founded in 1991 by Lars Wikander and Mike McDowell, specializing in expeditions to the Arctic and Antarctic aboard purpose-built expedition vessels. In 1998, Lars Wikander became the majority owner of the company. Three years later Lars became Chairman of the Board, when Patrick Shaw joined the company as President and Chief Executive Officer. On May 2007, Quark Expeditions became part of the UK-based TUI Travel PLC Group of Companies. On June 2015,