What is Pollutant? If the concentration of a substance already present in nature is increased to unrequired ratio due to human activity, which ultimately has a detrimental effect on the environment either by reducing the quality of life or affecting the health then it is known as a pollutant. Example: sulphur dioxide, carbon monoxide, lead, …
The term environment comes from the French word environ which means everything that surrounds us. The sum total of all surroundings of a living organism, including natural forces and other living things, which provide conditions for development and growth as well as of danger and damage. What are the segments of our environment? atmosphere hydrosphere …
What is Marine Chemistry? Marine Chemistry is the branch of chemistry where marine environments and different variables of marine ecosystem is studied. What are the major marine resources? • Fisheries • Oil • Gas • Minerals • Sand & Gravels • Renewable Energy What are the major supporting and regulating marine services? • Waste disposal, absorption and …
Marine Chemistry: Marine Resources, Pollutions and effects on Biota Read More »
Never add water in concentrated acid in an open beaker. Add concentrated acid into water. Acid loves water. The moment you will add water into acid, the acid molecules will try to grasp it and it might spill over you. Always use hand gloves, eyewear, and proper PPE when working with HCl or other acid. …
How to prepare dilute HCl from concentrated HCl? Read More »
Polymer electrolyte membrane fuel cells, also known as proton exchange membrane fuel cells (PEMFCs) are believed to be the most promising type of fuel cell for electric vehicles. The PEM fuel cell was invented by Willard Thomas Grubb and Leonard Niedrach in the early 1960s where sulfonated polystyrene membranes were used for electrolytes. In 1966, sulfonated polystyrene …
Lithium ion battery (LIB) is a rechargeable battery Consist of anode, cathode, electrolyte and a separator Available for purchase from 1991 Sony rechargeable battery past and present Charging and discharging of Li-ion battery Application of lithium-ion batteries Present day’s LIB: 18650, 26700 and 26650 size Application: Electric vehicle, smartphone, laptop, toys, e-cigarettes and vaporizers, medical devices, portable …
The Transmission electron microscope (TEM) is a special type of microscope that uses electrons to create high magnification images of the internal structure of a sample. Ernst Ruska designed and developed the TEM during his graduate studies under the supervision of Max Knoll in 1932-1933. However, the first commercial electron microscope was installed in IG Farben-Werke …
TEM Principles, Imaging Techniques, Advantages, and Disadvantages Read More »
Nucleon: The constituent part of a nucleus (i.e. a neutron or proton). Nuclei: Plural of nucleus (one nucleus, 5 nuclei). Nuclide: Specific types of atoms are called nuclides. These nuclides are distinguished by a specific atomic number Z, which is the number of protons in that atom, and a specific mass number A. Scientists believe …