PPT-(2) The nucleus د.غيداء

كاظم semi fluid matrix proteins metabolites Ions fibrous lamina What are the functions of nuclear matrix H ave structural role in the cell where . Powered by the intellect and insight of an enterprising group of tech-savvy construction experts and elite business magnates, Nucleus Premium Properties has earned quite a reputation for its high-end construction standards, structural durability, rock-solid reliability, transparent dealings, quality assurance and deadline-oriented delivery.. (around 400 BCE). Democritus thought matter could be divided into. . smaller and smaller pieces until a . single indivisible . particle is reached. . He named this particle the . atom. He proposed that atoms are of different sizes, in constant motion, and separated by empty spaces.. On your bell work . sheet, answer the following.. When . are zeros significant? . . When . do you use the fewest number of Significant Figures?. Objectives. The Structure of the Atom. Properties of Subatomic Particles. Kelly . Bushouse. , Cap Kelly, and Connor O’Neill. What is the nucleus?. . The nucleus is the control center of the cell.. Hereditary information is stored as DNA and RNA in the nucleus.. The nucleus controls reproduction, movement, eating, and more.. Behrouz. . Mahmoudi. Cell organelles-2. 1. Golgi apparatus. 2. Golgi apparatus (sometime called the Golgi body). . It was identified in 1897 by the Italian physician . Camillo. Golgi and named after him in 1898. Ernest Rutherford. Determined the structure of the atom. First to split the atom. Hans Geiger . Inventor of the Geiger counter to measure radiation. Ernest Marsden. Found that a few scattered alphas at angle over 140 degrees from the beam. Protons and Neutrons. Who were they?. Ernest Rutherford is a physicist who won the . N. obel Prize for chemistry. He. discovered the concept of radioactive half-life and theorized that atoms have their. dust tail. - A long, wide tail buffeted by photons emitted from the Sun, but it curves slightly due to the comet's motion.. hydrogen envelope. - Hydrogen gas that surrounds the coma of the comet and trails along for millions of miles (it is usually between the ion tail and the dust tail). The hydrogen envelope is about 10 million km across at the nucleus of the comet and about 100 million km long.. By. Dan Intartaglio &. Joel Skivington. History. Robert Brown. 1773-1858. -Discovered in 1831 by Scottish botanist Robert Brown. -Suggested . the nucleus played a key role in fertilization and development of the embryo in plants. Some History of the Nucleus. Was discovered by Ernest Rutherford, a New Zealand born British physicist, in May of 1911.. In . a well-known experiment done by one of Rutherford's students, . alpha particles were observed to scatter backwards from a gold foil. Rutherford’s . Learning Goal . Write a balanced nuclear equation showing mass numbers and atomic numbers for radioactive decay.. Balancing Nuclear Equations. In a process called . radioactive decay. , the nucleus breaks down by emitting radiation. . . . For elements of higher atomic number, the ratio rises to approximately 1.6 to 1 . As a nuclide departs from this stable ratio, changes in the nucleus occur which tend to bring the product to a more stable arrangement. . information and serves as the center of regulatory activity . The nucleus is enclosed in a nuclear envelop. A typical interphase plant cell nucleus contains one to . several. nucleoli. lying free in the nuclear matrix. Structure: pancreatic acinar cells. Identification: nucleus, nucleolus, heterochromatin. Heterochromatin. Nucleus. Nucleolus. Pancreas . 158. Pancreas . 158. 32409. Nuclei with . nucleoli. 32409.