The periodic table arranges all the elements by their chemical and physical properties. Learning Objective: To understand the organization of elements in the periodic table and identify their properties. Elements Elements are everywhere: some we can see, such as, silver, gold (Figure 1), sodium, while others are invisible, such as, oxygen, helium, hydrogen. An element … Read More
Atomic structure consists of a nucleus, protons, neutrons and electrons. Atoms are basic building blocks of matter. This course introduces the concept of atomic structure and covers the following topics: matter atoms, subatomic particles atomic number and mass number isotopes various atomic theories Matter Matter is anything that has mass and takes up space (has … Read More
Carbohydrates are biomolecules composed of carbon, oxygen, and hydrogen. The general formula for carhohydrates is Cn(H2O)n. Learning Objectives: Understand carbohydrates and describe the structure of mono-, di-, and poly-saccharides. They are commonly known as sugars or sacchrides (Figure 1). Carbohydrates play several roles in living organisms. In animals they acts as an energy source and … Read More
Proteins are compounds made of large number of amino acids joined together by peptide linkages to form long polypeptide chains. Learning Objective: Demonstrate monomeric units of proteins, identify various protein structure, hemoglobin, and several major functions of proteins Amino acids are the building blocks of peptides and proteins. They act as intermediates in cellular metabolism. … Read More
Nucleic acids are macromolecules composed of monomeric units called nucleotides joined together by phosphodiester bonds. These nucleotides constitute DNA and RNA. Learning Objective: Describe the basic structure of nucleic acids and compare & contrast the structure of DNA and RNA. In phosphodiester bonds, one phosphoric acid molecule forms bonds with the 3′ carbon of one … Read More
Lipids are esters of long chain fatty acids. These are a diverse group of naturally-occurring organic compounds, such as fat, waxes, sterols, glycerides and phospholipids (Figure 1). Learning Objective: Identify different kinds of lipids, their characteristics, and major functions in the body. These compounds are similar to each other as they are soluble in non-polar … Read More
Electrophoresis is defined as a technique, where the migration and separation of charged particles (ions) occur under the influence of an electric field. The process does not affect the molecular structure of compounds being separated, yet it is highly sensitive to differences in molecular charge and mass of the components of the sample (Figure 1). … Read More
A chemical reaction is a process that involves rearrangement of the molecular or ionic structure of a substance. This involves breaking or formation of bonds between the atoms or ions. This course covers examples of chemical reaction , types of chemical bonds, and types of chemical reaction. When we hear the word chemistry, we envision … Read More
A centrifuge is a device that uses centrifugal force to separate two or more substances of different density or mass (Figure 1). Basis of Separation Materials with heavier masses move faster and farther away from the central point than those with lighter masses. Principle Involved A centrifuge consists of a fixed base and a center … Read More
Gas-Liquid Chromatography (GLC) is a separation technique in which gas (usually inert gas, such as helium or nonreactive gas, such as nitrogen), is used as a mobile phase (Figure 1) , and liquid as a stationary phase. Basis of separation is difference in partition coefficient of volatilized compounds between liquid and gas phases when the … Read More
