science

Press cake

Press cake 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 Press cake rather than just read about it. In short: A press cake or oil cake is the solid matter remaining after pressing something to extract the liquids. Their most common use is in animal feed.

Key takeaways

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

Reference excerpt

A press cake or oil cake is the solid matter remaining after pressing something to extract the liquids. Their most common use is in animal feed. Some foods whose processing creates press cakes are olives for olive oil (pomace), peanuts for peanut oil, coconut flesh for coconut cream and milk (sapal), grapes for wine (pomace), apples for cider (pomace), mustard cake, and soybeans for soy milk (used to make tofu) (this is called soy pulp) or oil. Other common press cakes come from flax seed (linseed), cottonseed, and sunflower seeds. However, some specific kinds may be toxic, and are rather used as fertilizer; for example, cottonseed contains a toxic pigment, gossypol, that must be removed before processing.

Household use In Nepalese cuisine the oil cake of the Persian walnut is used for culinary purposes, and it is also applied to the forehead to treat headaches. In some regions it is used as boiler fuel as a means of reducing energy costs, for which it is quite suitable.

Military use In 1942 the Porton Down biology department outsourced the production of 5,273,400 linseed press cakes to Olympia Oil and Cake Company in Blackburn Meadows which would then be infected with Bacillus anthracis (bacteria that causes anthrax) and using in the biological warfare program Operation Vegetarian. The plan was to entice cattle into eating the anthrax-laden press cakes.

Peanuts Peanut pie (or peanut bran) is a byproduct of biofuel and consumable peanut oil production. It has uses in livestock feed, particularly in the diets of ruminant animals. The Brazilian Biodiesel Program has included peanuts as a part of its raw materials supply, as the legume has a 45% to 50% grain oil yield. Family farmers include peanut in their cultivation, which contributes to the diversification of production and income generation. After the extraction of the oil, peanut pie (also called peanut bran) has a nutritional value of 45% protein, approximately 8.5% grease, and a maximum of 9.5% cellulose.

References

Illustrations

Worked examples

Example 1 — a first encounter with Press cake

Start with the simplest possible case. Write down what Press cake 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 Press cake 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 Press cake 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 Press cake

In research: Press cake 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 Press cake 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: Press cake is common in secondary-school and first-year university syllabi. It links to neighbouring topics Biogas substrates, By-products, Fodder, so understanding it makes those chapters shorter.
In everyday life: Look for Press cake 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Press cake in 20 minutes

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

Frequently asked questions

What is Press cake in simple terms?

A press cake or oil cake is the solid matter remaining after pressing something to extract the liquids. Their most common use is in animal feed.

Why does Press cake 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 Press cake?

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 Press cake.