biology

Lactobacillus kefiranofaciens

Lactobacillus kefiranofaciens is a biology 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 Lactobacillus kefiranofaciens rather than just read about it. In short: Lactobacillus kefiranofaciens is a species of slime-forming, homofermentative, rod-shaped lactic acid bacteria first isolated from kefir grains, hence its name. Its type strain is WT-2B (ATCC 43761).

Key takeaways

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

Reference excerpt

Lactobacillus kefiranofaciens is a species of slime-forming, homofermentative, rod-shaped lactic acid bacteria first isolated from kefir grains, hence its name. Its type strain is WT-2B (ATCC 43761). Its genome has been sequenced. Lactobaccillus kefiranofaciens was first identified in 1967 in Russia through studying kefir granules. Lactobaccillus kefiranofaciens is part of the Lactobacillus genus and Firmicutes phylum of bacteria. These bacterium metabolize carbohydrates and produce lactic acid, which can be useful in fermentation. Two subspecies have been identified as kefirgranum and kefiranofaciens, which share properties such as being gram-positive, facultatively anaerobic, and rod-shaped. L. kefiranofaciens is the subspecies related to kefir granules. Studies have investigated the origins and causes for variation in kefir composition and led to conflicting results. Some studies indicate the presence of L. kefiranofaciens was due to geographical location, while others indicate it was due to the different milks used.

Contribution to kefir and other fermented products L. kefiranofaciens produces kefiran, an extracellular polysaccharide that helps in creating a biofilm, or kefir granule. When combined with milk, kefir granules help produce the drink kefir. Kefir is a probiotic drink containing lactic and acetic acid bacteria as well as yeasts and is commonly known to help with intestinal health. Due to its diverse microbial composition, evidence indicates kefir could have numerous additional health benefits including regulating blood lipid levels and high blood pressure along with antimicrobial properties. L. kefiranofaciens is often included in starters for food/drink fermentation. There is no evidence of pathogenicity nor toxicity from kefir, leading to L. kefiranofaciens being widely regarded as a safe for ingestion and assisting in fermentation.

Possible future applications Evidence from a mice study indicates that through the gut microbiome's relationship to brain function, L. kefiranofaciens consumption could help improve symptoms related to depression. Continued research on Lactobacillus kefiranofaciens could lead to new approaches on depression treatment.

References

Further reading Ojcius, David M.; Chen, Yen-Po; Chen, Ming-Ju (2013). "Effects of Lactobacillus kefiranofaciens M1 Isolated from Kefir Grains on Germ-Free Mice". PLOS ONE. 8 (11) e78789. Bibcode:2013PLoSO...878789C. doi:10.1371/journal.pone.0078789. ISSN 1932-6203. PMC 3823980. PMID 24244362. Chen, Y.P.; Hsiao, P.J.; Hong, W.S.; Dai, T.Y.; Chen, M.J. (2012). "Lactobacillus kefiranofaciens M1 isolated from milk kefir grains ameliorates experimental colitis in vitro and in vivo". Journal of Dairy Science. 95 (1): 63–74. doi:10.3168/jds.2011-4696. ISSN 0022-0302. PMID 22192184.

External links "Lactobacillus kefiranofaciens". The Encyclopedia of Life. LPSN Type strain of Lactobacillus kefiranofaciens at BacDive - the Bacterial Diversity Metadatabase

Worked examples

Example 1 — a first encounter with Lactobacillus kefiranofaciens

Start with the simplest possible case. Write down what Lactobacillus kefiranofaciens claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Lactobacillus kefiranofaciens 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 Lactobacillus kefiranofaciens 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 Lactobacillus kefiranofaciens

In research: Lactobacillus kefiranofaciens appears in biology 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 Lactobacillus kefiranofaciens 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: Lactobacillus kefiranofaciens is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacteria described in 1988, Food microbiology, Lactobacillaceae, so understanding it makes those chapters shorter.
In everyday life: Look for Lactobacillus kefiranofaciens 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 Lactobacillus kefiranofaciens in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lactobacillus kefiranofaciens 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 Lactobacillus kefiranofaciens out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lactobacillus kefiranofaciens in simple terms?

Lactobacillus kefiranofaciens is a species of slime-forming, homofermentative, rod-shaped lactic acid bacteria first isolated from kefir grains, hence its name. Its type strain is WT-2B (ATCC 43761).

Why does Lactobacillus kefiranofaciens matter?

Because it connects several biology 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 Lactobacillus kefiranofaciens?

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 Lactobacillus kefiranofaciens.