science

Viili

Viili is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Viili rather than just read about it. In short: Viili (Finnish) or Fil (Swedish) is a mesophilic fermented milk product found in the Nordic countries, particularly Finland and Sweden. Viili is similar to yoghurt or kefir, but when left unmixed, its texture is malleable, or "long".

Key takeaways

Viili belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Viili to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Viili from memory before moving on to harder problems.

Reference excerpt

Viili (Finnish) or Fil (Swedish) is a mesophilic fermented milk product found in the Nordic countries, particularly Finland and Sweden. Viili is similar to yoghurt or kefir, but when left unmixed, its texture is malleable, or "long". The metabolism of the bacteria used in the fermentation also gives viili a slightly different taste. This cultured milk snack resembles yoghurt and is the result of microbial action of lactic acid bacteria (LAB) and a surface-growing yeast-like fungus Geotrichum candidum present in milk, which forms a velvet-like surface on viili. In addition, most traditional viili cultures also contain yeast strains such as Kluveromyces marxianus and Pichia fermentans. The lactic acid bacteria identified in viili include the acid‐producing Lactococcus lactis subsp. lactis and L. l. cremoris as well as the aroma producers L. lactis subsp. lactis biovar diacetylactis and Leuconostoc mesenteroides. Among those mesophilic LAB strains, the slime-forming Lc. lactis subsp. cremoris produce a phosphate-containing heteropolysaccharide, named viilian. Viilian is similar to kefiran produced by kefir grains. The production of exopolysaccharides (EPS) by the strain forms the consistency character of viili and it has been claimed to have various functional benefits toward the rheological properties of milk products and the health improving potential. In modern practice, pasteurized milk is used, fermentation is carried out in a dairy plant in controlled conditions using laboratory-grown cultures and the product sold fresh. Viili is widely available in Finland and Sweden in grocery stores in several variants, both natural and with berries or other flavors . In Sweden it is also common to have different LAB and yeast strains that give the Fil different tastes.

Other variants Several variants of fermented milk products are found in Western Finland and Sweden, such as filmjölk ("viili milk") or långfil ("long viili"), which vary in consistency and fermentation. In Norway, filmjölk is usually named "kulturmelk" ("cultured milk") or "surmelk" ("sour milk"), while in Gotland and Iceland, the name "skyr" is used to refer to fresh cheese that is eaten in ways similar to yoghurt variants. Additionally in Iceland "súrmjólk" is a local variant of filmjölk. The Swedish variant most resembling viili is called filbunke. Cream viili (Finnish: kermaviili) is made from cream instead of milk, and is used in cooking like sour cream, or with dill, chives and other spices as cold sauce for fish, or as a base for dip sauces.

References Leporanta, K. 2003. Viili and Långfil – exotic fermented products from Scandinavia. Valio Foods & Functionals. On line version Mistry, V. V. 2004. Fermented liquid milk products. In: Handbook of food and beverage fermentation technology. (Ed. Y. H. Hui, L. Meunier-Goddik, Å. S. Hansen, J. Josephsen, W. Nip, P. S. Stanfield and F. Toldrá) Marcel Dekker, Inc. New York, U.S.A. Ruas-Madiedo, P., M. Gueimonde, C. G. De los Reyes-Gavilán and S. Salminen. 2006. Short communication: Effect of exopolysaccharide isolated from “viili” on the adhesion of probiotics and pathogens to intestinal mucus. J. Dairy Sci. 89:2355-2358. Shurtleff, W. and A. Aoyagi. 2004. History of Fermented Soymilk and Its products: History of Soybeans and Soyfoods: 1100 B.C. to the 1980s. Soyfoods Center, Lafayette, California.

External links The dictionary definition of viili at Wiktionary

Illustrations

Worked examples

Example 1 — a first encounter with Viili

Start with the simplest possible case. Write down what Viili claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Viili before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Viili ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Viili

In research: Viili appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Viili in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Viili is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fermented dairy products, Finnish cuisine, Non-Newtonian fluids, so understanding it makes those chapters shorter.
In everyday life: Look for Viili outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Viili in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Viili means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Viili out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Viili in simple terms?

Why does Viili matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Viili?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Viili.