What are pigment molecules called?
Such pigment molecules include anthocyanins, flavanoids, flavines, quinones and cytochromes, just to name a few.
What is the cluster of pigment and protein?
The light-dependent reactions begin in a grouping of pigment molecules and proteins called a photosystem. Photosystems exist in the membranes of thylakoids. A pigment molecule in the photosystem absorbs one photon, a quantity or “packet” of light energy, at a time.
What is a cluster of pigment molecules embedded in the thylakoid membrane?
Stacks of thylakoids embedded with pigment molecules are called grana. The inner matrix of the chloroplast is called the stroma.
What are the clusters of light absorbing pigments called?
In thylakoid membranes of chloroplasts, pigments are organized in clusters called photosystems, each consisting of 200-300 pigment molecules. Carotenoid pigments absorb violet and blue but transmit yellow, orange, and red.
What is it called when pigment particles stick to each other?
This process can continue until essentially all the particles are stuck to each other. This process is called flocculation. The clumps of particles so formed are often called flocs. Flocculation depends on forces between pigment particles and molecules of the liquid phase.
What is the particle size of pigments?
The required particle size of the pigments depends on the intended use and can vary from few micrometers (offset printing) to medium grades (10–45 micrometers, automotive coatings, gravure and flexographic printing) and coarser grades (corrosion-inhibiting systems and plastics).
How are pigments separated from their aggregates?
The process is carried out in various types of milling equipment where shear forces are applied to the pigment aggregates, in order to separate the primary pigment particles. This stage is often called ‘grinding’.
Are pigment particles primary particles or secondary particles?
Pigment particles appear in larger aggregates, agglomerates or flocculates of different sizes and shapes rather than in single discrete crystals. D.M. Yebra, C.E. Weinell, in Advances in Marine Antifouling Coatings and Technologies, 2009 Pigment particles do not usually exist as primary particles but instead as aggregates or agglomerates.