Dr Rajiv Desai
An Educational Blog
HYDROGEN
Hydrogen: _ _ Section-1 Prologue: Primary energy sources include fossil fuels (petroleum, natural gas, and coal), nuclear energy, and renewable sources of energy. Energy carriers include electricity and heat as well as solid, liquid and gaseous fuels. They occupy intermediate steps in the energy-supply chain between primary sources and end-use applications. Energy carriers allow the transport of energy in a usable form from one place to another. Hydrogen is an energy carrier, not an energy source and can deliver or store a tremendous amount of energy. Hydrogen is the chemical element with the symbol H and atomic number 1. H is in the upper left corner of the Periodic Table. Hydrogen is the most basic chemical element — just one proton and one electron — and makes up nearly three-quarters of the mass in the universe. Stars such as the Sun are mainly composed of […]
DRONE
DRONE: _ Section-1 Prologue: The term “Drone” has been massively overused; most of you have surely seen it time and time again in news and media articles. This term can range from small and cheap hobby aircraft available at Amazon all the way to multimillion weapons systems used on battlefields. Drone is a general term, not a technical one. They are generally equated with unmanned aerial vehicles (UAVs). UAVs can be controlled remotely or autonomously. When we speak about drones, we think about a battlefield, destruction, and death. This is because of the fact that the drones have been conventionally used by the armed forces to drop bombs and destroy enemy targets. These are called the military drones. According to the Bureau of Investigative Journalism, there have been at least 14,040 confirmed drone strikes between Jan. 2002 and Jan. 2019. UAVs are an emerging technology known for their […]
FOOTWEAR
FOOTWEAR: _ _ Section-1 Prologue: Shoes are a product of everyday use that everyone in the world owns; there are more than 20 billion pairs of shoes manufactured each year. Shoes have come a long way in the thousands of years since primitive man first donned bark and animal skins. Originally used to protect feet from harsh temperatures and rough land, shoes have evolved into an article of high fashion and style, a sartorial reflection of class, rank, and wealth. Most people think that wheel invention was the greatest event of the ancient time, but shoemaking takes a very high position on that list too. As they say, “you are what you wear.” And there’s a lot that shoes can tell us about a person. Shoes make the man, they say. Throughout human history, we’ve improved, embellished and refined footwear. We’ve created shoes that impress and inspire, and shoes […]
MUCORMYCOSIS
Mucormycosis: (Previously called zygomycosis: misnomer black fungus) _ _____ Section-1 Prologue: Fungi are important to everyday human life. Fungi are important decomposers in most ecosystems. Mycorrhizal fungi are essential for the growth of most plants. Fungi, as food, play a role in human nutrition in the form of mushrooms, and also as agents of fermentation in the production of bread, cheeses, alcoholic beverages, and numerous other food preparations. Secondary metabolites of fungi are used as medicines, such as antibiotics and anticoagulants. Fungi are model organisms for the study of eukaryotic genetics and metabolism. Fungi are relatively uncommon causes of disease in healthy and immunocompetent human hosts, even though hosts are constantly exposed to infectious propagules. However fungal diseases have occurred originating from opportunistic and pathogenic fungi. Opportunistic fungi have a preferred habitat independent from the living host and cause infection after accidentally penetration of intact skin barriers, or when […]
Plane Crash
Plane Crash: “Flying is not inherently dangerous, but to an even greater extent than the sea, it is terribly unforgiving ….” —Captain A. G. Lumplugh, British Aviation Insurance Group ________ Section-1 Prologue: Flight is, and always will be a marvel of human achievement. The opportunity to “spread your wings” and fly is an unbelievable privilege and experience. Airways have undergone a drastic evolution in the past decade, with airplanes becoming the most widely used means of transport across the globe. This is primarily because of the higher reliability, least travel time and a better cost effectiveness of the airways over other modes of transport. In addition to that, airports are traditionally considered as the country’s signature monuments. It showcases to an outsider, the first and the last impression of the country. Commercial aviation transports more than four billion passengers annually on airliners. Aviation is a critical part of national economy, […]
