science

Hasma

Hasma 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 Hasma rather than just read about it. In short: Hasma (harsmar, hashima) is a Chinese and widely Central Asian dessert ingredient made from the dried fatty tissue found near the fallopian tubes of true frogs, typically the Asiatic grass frog (Rana chensinensis). Because of its whitish appearance, hasma is often called "snow frog fat".

Key takeaways

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

Reference excerpt

Hasma (harsmar, hashima) is a Chinese and widely Central Asian dessert ingredient made from the dried fatty tissue found near the fallopian tubes of true frogs, typically the Asiatic grass frog (Rana chensinensis). Because of its whitish appearance, hasma is often called "snow frog fat". Hasma is relatively expensive, so it is reserved for special occasions and found in high-end restaurants.

Production Hasma is produced primarily in the Heilongjiang, Jilin, and Liaoning provinces in China. Previously part of Chinese imperial cuisine, soups made with hasma are now widely available in North American cities with large Chinese populations and in Mainland China, Taiwan, Singapore and Hong Kong, albeit at a high price.

Physical characteristics Hasma is sold dried as irregular flat pieces and flakes ranging from 1–2 cm in length and 1–5 mm in thickness. Individual pieces are yellowish-white in color with a matte luster, and may be covered with off-white pellicles. When rehydrated, dried hasma can expand up to 10-15 times in size. The dried hasma is rehydrated and double-boiled with rock sugar to create a glutinous texture and opaque color. Dried or rehydrated hasma has a slight fishy smell. In its unflavored form it is sweet and slightly savory in taste with a texture that is glutinous, chewy, and light, quite similar to that of tapioca in a dessert.

Preparation

Hasma serves the role of providing texture to tong sui, or sweet soups, as well as increasing the perceived luxuriousness and prestige of the soup. These soups are usually flavored with rock sugar. For the uninitiated, this relatively accessible eating experience belies the exotic sounding nature of the dessert. Hasma is widely featured in dessert dishes in high class restaurants in Hong Kong. Hasma is most commonly paired in sweet soups with:

Jujubes (Chinese: 紅棗; pinyin: hóng zǎo; lit. 'red date') Dried longan fruits (Chinese: 龍眼; pinyin: lóng yǎn; lit. 'dragon eye') Lotus seeds (Chinese: 蓮子; pinyin: lían zǐ) It is also a key ingredient in making "Three snow soup" (Chinese: 三雪湯; pinyin: sān xuě tāng), which consists of:

Chinese pear (Chinese: 雪梨; pinyin: xuě lí; lit. 'snow pear') Snow fungus (Chinese: 雪耳; pinyin: xuě ěr; lit. 'snow ear') Hasma can also be included in more exotic versions of shark fin soup.

Health claims Hasma is taken for medicinal purposes in traditional Chinese medicine. Hasma is prescribed to treat respiratory symptoms, but there exists scarce scientific research to support this practice. It is also a suggested remedy for stomach ulcers and to improve the appearance of skin, and even for restored strength after childbirth.

References

External links Hasma recipes Archived 2011-07-16 at the Wayback Machine Description of a meal with Hasma Recipe Archived 2012-03-18 at the Wayback Machine (in Chinese)

Illustrations

Worked examples

Example 1 — a first encounter with Hasma

Start with the simplest possible case. Write down what Hasma 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 Hasma 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 Hasma 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 Hasma

In research: Hasma 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 Hasma 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: Hasma is common in secondary-school and first-year university syllabi. It links to neighbouring topics Chinese desserts, Frogs, Offal, so understanding it makes those chapters shorter.
In everyday life: Look for Hasma 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 Hasma in 20 minutes

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

Frequently asked questions

What is Hasma in simple terms?

Why does Hasma 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 Hasma?

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 Hasma.