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knowledge want: GREAT SCIENTISTS OF WORLD - WILHELM RONTGEN : Wilhelm Conrad Röntgen , Röntgen also spelled Roentgen , (born March 27, 1845, Lennep, Prussia —died February 10, 1923, Munich, Germany)...

Wilhelm Conrad Röntgen , Röntgen also spelled Roentgen , (born March 27, 1845, Lennep, Prussia —died February 10, 1923, Munich, Germany), physicist who was a recipient of the first Nobel Prize for Physics, in 1901, for his discovery of X-rays, which heralded the age of modern physics .    Roentgen , , discovered X - rays in 1895—accidentally—while testing whether cathode rays could pass through glass. ... Because he did not know what the rays were, he called them ' X ,' meaning 'unknown,' rays .   When Röntgen held a piece of lead in front of the electron-discharge tube, it blocked the rays , but he was shocked to see his own flesh glowing around his bones on the fluorescent screen behind his hand. He then placed photographic film between his hand and the screen and captured the world's first X - ray image. Röntgen , on 8 November 1895, produced and detected electromagnetic radiation in a   wavelength range known as X-rays or Röntgen rays, an a...

A  healthy   diet  promotes   success   in  life -  better  concentration   and  alertness,  better  physical  health  that  translate  into   good  mental  and   emotional  health. Good  eating  habits   also   are  a  front  line  defense   against  obesity,when  a  child  eats  many   more  calories  than  he  or  she  uses  up. An   obese    is  at  risk  for   developing  diabetes ,high blood pressure,  asthma   and  sleep  apnea.   "No  parent  wants   her  child  to  be  sick .No  parent   wants  her  child  to   feel  like  an  outsider  in   social  situ...

A  healthy   diet  promotes   success   in  life -  better  concentration   and  alertness,  better  physical  health  that  translate  into   good  mental  and   emotional  health. Good  eating  habits   also   are  a  front  line  defense   against  obesity,when  a  child  eats  many   more  calories  than  he  or  she  uses  up. An   obese    is  at  risk  for   developing  diabetes ,high blood pressure,  asthma   and  sleep  apnea.   "No  parent  wants   her  child  to  be  sick .No  parent   wants  her  child  to   feel  like  an  outsider  in   social  situ...

data-ad-slot="4513022169" data-ad-format="auto" data-full-width-responsive="true"> Strawberries are a beautifully sweet, aromatic, fiber rich fruit that is packed with vitamins, and antioxidants. According to the Germplasm Resources Information Network , there are 103 distinct species and subspecies of strawberry plants. The peak season for strawberries is typically April through June, but generally speaking you can get strawberries year round. And if you somehow can't find fresh strawberries in your market, you can always purchase frozen one Strawberries are a voluminous fruit, containing little calories and carbohydrate in a large portion. One cup of strawberries contains only 49 calories and provides 3 g of heart healthy fiber, and only 12 g of carbohydrate. A cup of strawberries also provides more than a days worth of vitamin C. If you are looking to add a few to your smoothie, you can tally the...

Gregor Mendel was an Austrian scientist, teacher, and Augustinian prelate who lived in the 1800s. He experimented on garden pea hybrids while living at a monastery and is known as the father of modern genetics.  Mendel , through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits. He founded genetics by his work cross-breeding pea plants. He discovered dominant and recessive characters (genes) from the crosses he performed on the plants in his greenhouse.     Mendel studied inheritance in peas (Pisum sativum). He chose peas because they had been used for similar studies, are easy to grow and can be sown each year. Pea flowers contain both male and female parts, called stamen and stigma, and usually self-pollinate.   ...

knowledge want: GREAT SCIENTISTS OF WORLD - ROSALIND FRANKLIN : Rosalind Franklin , in full Rosalind Elsie Franklin , (born July 25, 1920, London, England—died April 16, 1958, London), British scientis...

Rosalind Franklin , in full Rosalind Elsie Franklin , (born July 25, 1920, London, England—died April 16, 1958, London), British scientist best known for her contributions to the discovery of the molecular structure of deoxyribonucleic acid (DNA), a constituent of chromosomes that serves to encode genetic information.   Rosalind x-ray diffraction studies provided crucial clues to the structure of DNA and quantitatively confirmed the Watson-Crick DNA model,  Franklin earned a Ph.D. in physical chemistry from Cambridge University. She learned crystallography and X-ray diffraction, techniques that she applied to DNA fibers. One of her photographs provided key insights into DNA structure. Other scientists used it as evidence to support their DNA model and took credit for the discovery.    Franklin is best known for her work on the X-ray diffraction images of DNA, particularly Photo 51, while at King's College London, which led to the discovery of the...

  Niels Bohr was one of the foremost scientists of modern physics, best known for his substantial contributions to quantum theory and his Nobel Prize-winning research on the structure of atoms. Born in Copenhagen in 1885 to well-educated parents, Bohr became interested in physics at a young age In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted.   Bohr Model has some inaccuracies, but it's still used because of its simple approach to atomic theory. The Bohr model was also the first atomic model to incorporate quantum theory, meaning that it's the predecessor of today's more accurate quantum-mechanical models .   Bohr proposed his quantized shell model of the atom to explain how electrons can...

knowledge want: GREAT SCIENTISTS OF WORLD -ERNEST RUTHERFORD :   Ernest Rutherford postulated the nuclear structure of the atom, discovered alpha and beta rays, and proposed the laws of radioactive dec...

  Ernest Rutherford postulated the nuclear structure of the atom, discovered alpha and beta rays, and proposed the laws of radioactive decay. He received the Nobel Prize in Chemistry in 1908. According to the Rutherford atomic model: The positively charged particles and most of the mass of an atom was concentrated in an extremely small volume. He called this region of the atom as a nucleus. Rutherford model proposed that the negatively charged electrons surround the nucleus of an atom.   The Geiger–Marsden experiments (also called the Rutherford gold foil experiment ) were a landmark series of experiments by which scientists discovered   that every atom has a nucleus where all of its positive charge and most of its mass is concentrated. , Rutherford was curious. He wondered how he could use alpha particles to learn about the structure of the atom. He decided to aim a beam of alpha particles at a sheet of very thin gold foil. He chose gold because it ...