The Discovery Of The Electron The electron was discovered in 1895 by J.J. Thomson in the form of cathode rays‚ and was the first elementary particle to be identified. The electron is the lightest known particle which possesses an electric charge. Its rest mass is Me <approximately equal> 9.1 x 10 -28 g‚ about 1/1836 of the mass of the proton or neutron. The charge of the electron is -e = -4.8 x 10^-10 esu <elec trostatic unit). The sign of the electron’s charge is negative by convention‚ and
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Discovery Kazakhstan Animals of Kazakhstan Every person‚ who lives in Kazakhstan‚ knows‚ that animals of our motherland are very important not just for Kazakhstan‚ but for the whole world! I definitely agree with this opinion. In the essay‚ I will give you the basic reasons and explain‚ why most of the people tend to think that way. First of all‚ from the ancient times‚ different natural creatures help Kazakh people to survive in our cruel prairie. We cannot deny‚ that Kazakh nation always
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The leading disturbance Leukemia causes is the uncontrolled growth of leukocytes that prevent normal blood development in the bone marrow. All blood cells are formed in the bone marrow‚ developed from primitive stem cells into mature blood cells. There are approximately 2.5 million red blood cells and about 3‚500 white blood cells produced every second. These cells are produced at a ratio of seven hundred to one. There are four types of leukemia. These include acute myeloid leukemia‚ acute lymphoblastic
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Self Discovery Life is made of experiences. It can give one wisdom‚ knowledge‚ and even new goals. Similar to Janie‚ in Zora Neal Hurston’s “Their Eyes Were Watching God”‚ the loss of her husband‚ Joe‚ opens her life to discover new desires‚ rather than material things. Janie’s reaction to her husband’s loss‚ confidently expresses the changes that occurred within her. Symbolism‚ point of view‚ and imagery illustrate Janie’s internal change. Janie’s loss of her husband was a gateway for new opportunities
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natural sources in developing antibacterial compounds. The need to prevent and control infections as well as the reasonable use of currently available antibiotics is also emphasized. Keywords: Bacterial resistance • Antibacterial compound • Drug discovery • Target • Antimicrobial peptides © Versita Sp. z o.o. 1. Introduction The use of antibiotics‚ especially the excessive and indiscriminative use‚ both in medicine and veterinary science has contributed to the emergence of drug resistant organisms
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composition of bone mostly consist of inorganic material and collagen fibers. The macroscopic structures of bone is Compact bone‚ Cancellous bone‚ Epiphysis‚ Diaphysis‚ Periosteum‚ Red bone marrow‚ yellow bone marrow‚ and the articular cartilage (Doitpoms.com). Collagen is a triple helix structured protein that is the most prominent protein in the skeletal system. Bones consist of two distinct types of bone tissue such as cancellous and cortical bone. Cancellous bone is also known as spongy bone and is located
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Growth of Bones By: Asmaa Mohamed Bahaa ID: 2012189 Report on Bones’ Growth‚ Page 1 Assignment 1 BONE TISSUE ! Tissue Components Bone tissue is a type of connective tissue that contains lots of calcium and phosphorous salts. About 25% of bone tissue is water‚ another 25% is made up of protein fibers like collagen. The other 50% of bone tissue is a mixture of mineral salts‚ primarily calcium and phosphorous. ! ! Bone Anatomy Bone Forms Bones in the body are
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religious practices occurred. However‚ it is not until the Shang Dynasty when actually records of spiritual communication were founded. Oracle Bones were recorded of communication between human and spirits. The ritual of cracking oracle bones told what ancient Chinese concerned the most – the relationship between spirits and nature. The intricate Oracle Bones not only reveal the religious aspect of the Shang Dynasty‚ but also relate the cultural and political system in ancient China. During the Shang
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Bone functions as support and protection for the body as most of us may know. However‚ bones also function as a storage place for many essential life sustaining minerals. Calcium is the main mineral that bone is primarily composed of‚ and is very essential for other important body systems. When calcium levels are not adequate in the body from diet alone the body taps into the bones to get the calcium that cells organs nerves and muscles need. When the amounts of calcium are enough for the body‚ then
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Introduction • Bone tumor is neoplastic growth of tissue in bone‚ abnormal growth can benign or malignant. • Average five year survival in united states after being diagnosed with bone & joint cancer is 67%. CLASSIFICATION Tumor classified as primary tumors‚ which originate in bone derived cells & tissues.it may be neoplastic‚ developmental‚ traumatic‚ infectious & inflammatory etiology. Secondary tumors originate in other sites & spread (metastasizes) to skeleton. Carcinomas of prostate‚
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