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HIV Life Cycle

HIV Life Cycle Key Points HIV gradually destroys the immune system by attacking and killing a type of white blood cell called a CD4 cell. CD4 cells play a major role in protecting the body from infection. HIV uses the machinery of the…

ARV Adverse Effects

  ARV Adverse Effects Limitations to Treatment Safety and Efficacy Adverse Effects of Antiretroviral Agents Adverse effects have been reported with all ARV drugs and, in the earlier era of combination ART, adverse effects were among the most common reasons…

Hydroelectricity

Hydroelectricity   Graphic Credit: large.stanford.edu Hydroelectricity is electricity produced from hydropower. In 2015 hydropower generated 16.6% of the world’s total electricity and 70% of all renewable electricity, and was expected to increase about 3.1% each year for the next 25 years.   Generating methods   1.…

Galaxy

Galaxy Image Credit : .nbcnews.com   A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally “milky”, a reference to the Milky Way. Galaxies range in size from dwarfs with just a few hundred million (108) stars to giants with…

Constellation

Constellation Graphic Credit : institut-repere.com   A constellation is a group of stars that forms an imaginary outline or meaningful pattern on the celestial sphere, typically representing an animal, mythological person or creature, a god, or an inanimate object. Origins for the earliest constellations likely go…

Electron

Electron   The electron is a subatomic particle, symbol e− or  β−, whose electric charge is negative one elementary charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron has a mass that is approximately 1/1836 that of the proton. Quantum…

Proton

Proton Graphic Credit : Benedict Harrel ( slideplayer.com)   A proton is a subatomic particle, symbol p or p+, with a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron. Protons and neutrons, each with masses of approximately one atomic mass unit, are collectively referred to…

Atom

Atom                           Diagram Credit : sujathanellore ( slideshare.net)   An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are…

Comet

  Comet Diagram Credit : Anjali Kumbhar (pt.slideshare.net)   A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena…

Moon : Earth’s natural satellite

  Moon :  Earth’s natural satellite Graphic Credit : Victor F. Melitante Jr. (slideshare.net)   The Moon is an astronomical body that orbits planet Earth and is Earth’s only permanent natural satellite. It is the fifth-largest natural satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet…

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