Science Abbreviations MCQ questions and answers | GK Abbreviations

α -Hydroxy acids, or alpha hydroxy acids (AHAs), are a class of chemical compounds that consist of a carboxylic acid substituted with a hydroxyl group on the adjacent carbon. They may be naturally occurring or synthetic. AHAs are well known for their use in the cosmetics industry. They are often found in products that aid in the reduction of wrinkles, that soften strong, defining lines, and that improve the overall look and feel of the skin.

Very low frequency or VLF is the designation for radio frequencies (RF) in the range of 3 - 30 kHz, corresponding to wavelengths from 100 to 10 km, respectively. The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters (an obsolete metric unit equal to 10 kilometers).

Very high frequency (VHF) is the designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF).

Ultra high frequency (UHF) is the designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter). Radio waves with frequencies above the UHF band fall into the super-high frequency (SHF) or microwave frequency range.

Tuberculosis (TB) is a contagious infection that usually attacks your lungs. It can also spread to other parts of your body, like your brain and spine. A type of bacteria called Mycobacterium tuberculosis causes it.

The term acid equivalent (AE) is one that many people are less familiar with. Acid equivalent may be defined as that portion of a formulation (as in the case of 2,4-D ester for example) that theoretically could be converted back to the corresponding or parent acid.

The term acid equivalent (AE) is one that many people are less familiar with. Acid equivalent may be defined as that portion of a formulation (as in the case of 2,4-D ester for example) that theoretically could be converted back to the corresponding or parent acid.

The National University of Sciences & Technology (NUST) is a public research university under administration of Pakistan Armed Forces with its main campus in Islamabad, Pakistan. The university offers undergraduate and graduate degrees, including doctoral and professional degrees. Founded in 1991, it was initially formed for the need of commissioned officers by combining engineering colleges and schools of Pakistan Armed Forces. Later, it was converted into a public research university with the main campus setup in Islamabad to promote science and technology in Pakistan.

The National Aeronautics and Space Administration (NASA) is an independent agency of the U.S. federal government responsible for the civilian space program, as well as aeronautics and space research.

The Low Frequency (LF) band is mostly used for AM broadcasting in Europe as well as in areas of Northern Africa and Asia. Similar to VLF (Very Low Frequency), LF can also be used for navigational radio beacons. It can also be used for maritime ship-to-shore communication, as well as transoceanic air traffic control. Like the LF band, the Medium Frequency (MF) band is also mostly used for AM radio broadcasting.