Briefly describe the characteristics of several additives in ice cream

Ice cream is a frozen dairy product with a complex structure, consisting of air bubbles dispersed in a continuous liquid phase. Its physical composition includes:

1. **Air Bubbles:** Ice cream is a partially frozen foam, with air making up 40-50% of its volume.

2. **Liquid Phase:** Contains fat particles, milk proteins, insoluble salts, lactose crystals, bulk stabilizers, sucrose, lactose, and soluble salts.

### Additives in Ice Cream Production:

1. **Sweeteners:**

- **Purpose:** Provide sweetness, improve texture, and lower the freezing point.

- **Common Sweeteners:** Sucrose, corn syrup, glucose.

- **Standard Addition:** Sucrose content is typically 12-16%. Exceeding this range can affect sweetness and texture, while insufficient addition may result in a lack of sweetness.

2. **Stabilizers:**

- **Function:** Enhance viscosity, prevent ice crystal formation, and create a smooth, stable texture.

- **Types:**

- **Protein-Based:** Alginate, sodium caseinate.

- **Carbohydrate-Based:** Agar, sodium alginate, carboxymethyl cellulose.

- **Agar Properties:** Absorbs 14 times its volume in warm water but loses gelling ability above 70°C.

- **Dosage:** Typically 0.2% to 0.4%.

Proper selection and dosage of sweeteners and stabilizers are crucial for achieving the desired texture, taste, and stability in ice cream production.