Informing America, One Click at a Time
Amwoga Khalwale
What is Xylem? Xylem vessels are hollow cells arranged end to end and joined by perforation plates to form continuous tubes. In these cells both nucleus and cytoplasm are absent. The end walls of these cells are often completely broken to form a long distance channel for transport of water. The main function of xylem … Read more
Polymers are linearly chained large molecules composed of sequences of repeating monomer units connected by covalent bonds. Polymers can be classified as organic or inorganic polymers. Polymer as a chemical compound has high molecular weight consisting of a number of structural units linked together by covalent bonds. (A structural unit is a group having two … Read more
A chemical compound is made up of two or more elements that are chemically bonded together. One of the ways to classify compounds is by identifying them as either organic or inorganic. The main difference that lies between these organic compounds and inorganic compounds is that organic compounds always have a carbon atom while most of the … Read more
Moyoglobin is an iron and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. Myoglobin has a very high affinity for oxygen and acts as an oxygen molecule. It only releases oxygen when the partial pressure of oxygen has fallen drastically. Hemoglobin on the other hand is the … Read more
Neurons are electrically excitable cells in the human bodies that communicate with other cells through specialized connection referred to as Synapses. Each neuron has a cell body with many minute branched short protoplasmic extensions referred to as dendrites and an elongated unbranched protoplasmic extension referred to as Axon. What Are Myelinated Nerve Fibers? Myelinated Nerve … Read more
Get to understand a clear distinction between myelinated and unmyelinated neurons. The basis of comparison include: Speed of transmission, description, node of ranvier, axon, diameter, impulse conduction and location. BASIS OF COMPARISON MEDULLATED NERVE FIBRE Non-MEDULLATED Description Medullated nerve fibre is a nerve fibre with a medullary sheath. Non-medullated nerve fibre is a nerve fibre … Read more
The word ‘’ Crown” is derived from the Latin word “Corona” meaning Wreath. The crown is believed to have originated from Asia and Egypt before being adopted in Europe, where it has been used for a very long time (several thousand years) as a symbol of power and majesty. Kings and queens of England have … Read more
Intensive Distribution, Exclusive Distribution, and Selective Distribution are three different distribution strategies that companies use to make their products available to customers. The chosen level of distribution chosen generally depends on different factors such as the production capacity, the size of the target market, pricing and promotion policies as well as the seasonal requirement of … Read more
Neanderthal Neanderthals, or Homo neanderthalensis, were a species of hominins that lived in Eurasia from approximately 400,000 to 40,000 years ago. They are one of the closest extinct relatives of modern humans (Homo sapiens) and have fascinated scientists and the public alike for many years. The first fossil described as Neanderthal was first discovered in … Read more
Forging Forging is the metalworking process involving the shaping of metal using localized compressive forces. At the end of the forging process, the resulting product features extreme strength, impact toughness and wear resistance due to thermal and mechanical treatment. Forging can be classified according to the temperature at which it performed: cold forging, warm forging … Read more