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Hypromellose , short for hydroxypropyl methylcellulose (HPMC), is a semisynthetic, inert, viscoelastic polymer used in eye drops, as well as an excipient and controlled-delivery component in oral medicaments, found in a variety of commercial products.
Gelatin capsules, informally called gel caps or gelcaps, are composed of gelatin manufactured from the collagen of animal skin or bone. [4] Vegetable capsules, introduced in 1989, [5] are made from cellulose, a structural component in plants. The main ingredient of vegetarian capsules is hydroxypropyl methyl cellulose. In the 21st century ...
Methyl cellulose (or methylcellulose) is a compound derived from cellulose.It is sold under a variety of trade names and is used as a thickener and emulsifier in various food and cosmetic products, and also as a bulk-forming laxative.
Because cellulose is very crystalline, HPC must have an MS about 4 in order to reach a good solubility in water. HPC has a combination of hydrophobic and hydrophilic groups, so it has a lower critical solution temperature (LCST) at 45 °C. At temperatures below the LCST, HPC is readily soluble in water; above the LCST, HPC is not soluble.
A variant is the Septifragal capsule (valvular capsule) in which the outer walls break away from the septa and (usually axile) placentae as valves. Poricidal capsules dehisce through pores (openings) in the capsule, as in Papaver, the seeds escaping through these pores. Flowers and developing fruit capsules of the ground orchid Spathoglottis ...
Cellulose is a polymer made of repeating glucose molecules attached end to end. [4] A cellulose molecule may be from several hundred to over 10,000 glucose units long. Cellulose is similar in form to complex carbohydrates like starch and glycogen. These polysaccharides are also made from multiple subunits of glucose.
Vcaps capsules are a two-piece capsule made of hydroxypropyl methylcellulose, a cellulose-based raw material. They were designed to meet restrictive dietary needs, and are thus gluten-free , vegan , kosher , and halaal .
Plants belonging to the Fabaceae family such as clover, peas and legumes have also been prime candidates for LPC production. [7] While most plants have a mean leaf protein content of 4 to 6% w/v. Fabaceae plants tend to have nearly double that value at 8 to 10% v/w, depending on the protein estimation method employed.