What is a dimensional matrix?
What is a dimensional matrix?
The dimensions of a matrix are the number of rows by the number of columns. If a matrix has a rows and b columns, it is an a×b matrix. For example, the first matrix shown below is a 2×2 matrix; the second one is a 1×4 matrix; and the third one is a 3×3 matrix.
What is meant by identity matrix?
Identity Matrix is the matrix which is n × n square matrix where the diagonal consist of ones and the other elements are all zeros. It is also called as a Unit Matrix or Elementary matrix. It is represented as In or just by I, where n represents the size of the square matrix.
What is matrix order?
The order of the matrix is defined as the number of rows and columns. The entries are the numbers in the matrix and each number is known as an element. The size of a matrix is referred to as ‘n by m’ matrix and is written as m×n, where n is the number of rows and m is the number of columns.
Why is it called the identity matrix?
An identity matrix is a square matrix having 1s on the main diagonal, and 0s everywhere else. For example, the 2×2 and 3×3 identity matrices are shown below. These are called identity matrices because, when you multiply them with a compatible matrix , you get back the same matrix.
What is the rank of a 3×3 identity matrix?
Let us take an indentity matrix or unit matrix of order 3×3. We can see that it is an Echelon Form or triangular Form . Now we know that the number of non zero rows of the reduced echelon form is the rank of the matrix. In our case non zero rows are 3 hence rank of matrix is = 3.
What does a 1 mean in Matrix?
Identity matrix
What is matrix tablet?
Matrix tablet is an important tool for controlled and sustained release dosage forms. The hydrophilic polymer matrix is widely used in this dosage form. The use of different polymers in controlling the release of drugs has become the most important tool in the formulation of matrix tablets.
What is hydrophilic matrix?
Hydrophilic matrices are capable of controlling the release of drug over an extended period of time. Hydrophilic polymers, especially the hydrophilic derivatives of cellulose ethers, are frequently used for these applications.
What is the difference between extended release and sustained release?
The main difference between the medications is that Wellbutrin SR is the sustained-release version, whereas Wellbutrin XL is the extended-release version. The XL version is released more slowly into your body, which means it remains in your system longer.
Which one of the following is not true tablets are often coated?
The correct option is C. Often, tablets are actually coated in order to safeguard them from external environment , to increase strength, to make the swallowing easy or to mask the bitter tastes. An enteric coating is a polymer barrier applied to prevent its dissolution or disintegration in the gastric environment.
Why are tablets often coated?
Coated tablets are smooth, colored, and often shiny. They go down easier when you swallow and are tasteless. If tablets contain active ingredients that have to be protected from the acid in the stomach, they are coated with a protective layer that is resistant to gastric acid (gastro-resistant).
Why are tablets coated?
Sugar or film coating – surrounds the tablet normally to make it taste better or easier to swallow. These enteric coatings are placed around a drug to protect the drug from the acid environment, protect the stomach from the drug or deliver the drug to the site of action.
What are the characteristics of the monolithic devices?
A software system is called “monolithic” if it has a monolithic architecture, in which functionally distinguishable aspects (for example data input and output, data processing, error handling, and the user interface) are all interwoven, rather than containing architecturally separate components.
What is monolithic technology?
Monolithic, in information technology, means either very large (and possibly imposing) or composed all in one piece, depending on the particular context; the term is used in different ways to describe integrated circuits, organizations, applications and storage systems, among other things.
What are monolithic devices?
A device that is fabricated in a single piece; A device (i.e. circuit) that is operated at a single frequency or a single class of frequencies.
What is the characteristics of mucoadhesive systems?
Other desired characteristics of a mucoadhesive dosage form include high drug loading capacity, controlled drug release (preferably unidirectional release), good mucoadhesive properties, smooth surface, tastelessness, and convenient application.
Which substance is used as Mucoadhesive?
Typical examples include poly (acrylic acid) (PAA) and its weakly cross-linked derivatives and sodium carboxymethylcellulose (NaCMC). PAA and NaCMC possess excellent mucoadhesive characteristics due to the formation of strong hydrogen bonding interactions with mucin.
What are Osmogens?
Upon penetration of biological fluid into the osmotic pump through semipermeable membrane, osmogens are dissolved in the biological fluid, which creates osmotic pressure buildup inside the pump and pushes medicament outside the pump through delivery orifice. They include inorganic salts and carbohydrates.
Which one of the following is an example of natural mucoadhesive?
Both natural and synthetic polymers are used for the preparation of mucoadhesive buccal films. Various natural polymers which can be used in mucoadhesive buccal films are chitosan, sodium alginate, tragacanth, gelatin and guar gum etc.
What is mucoadhesive tablet?
Abstract. Oral mucoadhesive tablets belong to modern dosage forms, which allow controlled drug release after buccal application. They are used for the treatment of oral cavity disorders or for systemic administration of drugs with high first-pass effect or drugs instable in gastrointestinal tract.
What is bioadhesive drug delivery system?
The term bioadhesive describes materials that bind to biological substrates, such as mucosal membranes and in bioadhesive drug delivery systems, the term bioadhesion is used to describe the bonding or adhesion between a synthetic or natural polymer and soft tissues such as epithelial cells.
Which of the following technology is used for colon targeting?
Osmotic Controlled Drug Delivery (ORDS-CT) The OROS-CT (Alza corporation) can be used to target the drug locally to the colon for the treatment of disease or to achieve systemic absorption that is otherwise unattainable.