| Titre : |
Introduction to electron microscopy |
| Type de document : |
texte imprimé |
| Auteurs : |
Hall, Cecil E., Auteur |
| Editeur : |
Mc Graw Hill |
| Année de publication : |
1996 |
| Importance : |
397 p. |
| Format : |
23 cm |
| ISBN/ISSN/EAN : |
1234567890 |
| Langues : |
Anglais (eng) |
| Index. décimale : |
500 Sciences de la nature et mathématiques : classer ici les sciences naturelles, les ouvrages sur les sciences pures et appliquées. Classer |
| Résumé : |
Microscopy is the science of examining minute objects with the aid of microscopes. The unaided human eye can resolve two objects separated by a distance which subtends about 1 minute of arc at the eye (2.9 X 10-4 radian). It is capable of focusing on objects situated from infinity down to a distance of roughly 250 mm. Thus the smallest distinguishable structure at the near point is about 0.07 mm. The unaided eye is actually a kind of telescope, and its primitive value resided in this property. Optical microscopes enable us to perceive the texture of objects down to dimensions about ah of the limit of the unaided eye. Current electron microscopes are capable of further useful magnifications which surpass those of the best optical microscopes by almost exactly the same factor that the optical microscopes surpass the unaided eye. There is the possibility of some further improvement which would bring the resolving power of electron microscopes close to the dimensions of single atoms. After a space of time exceedingly short compared with the period of development of optical microscopes, the electron microscope is currently being used close to the theoretically predicted limit making possible the visualization of colloidal particles of all kinds, viruses, and the structure of biological and other materials down to dimensions of the order of inter-atomies distances.
Microscopy has its beginnings in the early part of the seventeenth century with contributions from a number of individuals.
But the development of the art in that period is dominated by the name of Anton van Leeuwenhoek (1632-1723), who became most successful in the construction of instruments and in their use for observing a wide variety of objects in a scientific manner. In the latter part of the seventeenth century he observed bacteria, blood cells, and the structure of muscle and nerve cells. After his death, microscopes seem to have been employed mainly by hobbyists for about one hundred years until the nineteenth century, when the work of Leyden on cells (1848), Pasteur on bacteria (1857). |
Introduction to electron microscopy [texte imprimé] / Hall, Cecil E., Auteur . - Mc Graw Hill, 1996 . - 397 p. ; 23 cm. ISSN : 1234567890 Langues : Anglais ( eng)
| Index. décimale : |
500 Sciences de la nature et mathématiques : classer ici les sciences naturelles, les ouvrages sur les sciences pures et appliquées. Classer |
| Résumé : |
Microscopy is the science of examining minute objects with the aid of microscopes. The unaided human eye can resolve two objects separated by a distance which subtends about 1 minute of arc at the eye (2.9 X 10-4 radian). It is capable of focusing on objects situated from infinity down to a distance of roughly 250 mm. Thus the smallest distinguishable structure at the near point is about 0.07 mm. The unaided eye is actually a kind of telescope, and its primitive value resided in this property. Optical microscopes enable us to perceive the texture of objects down to dimensions about ah of the limit of the unaided eye. Current electron microscopes are capable of further useful magnifications which surpass those of the best optical microscopes by almost exactly the same factor that the optical microscopes surpass the unaided eye. There is the possibility of some further improvement which would bring the resolving power of electron microscopes close to the dimensions of single atoms. After a space of time exceedingly short compared with the period of development of optical microscopes, the electron microscope is currently being used close to the theoretically predicted limit making possible the visualization of colloidal particles of all kinds, viruses, and the structure of biological and other materials down to dimensions of the order of inter-atomies distances.
Microscopy has its beginnings in the early part of the seventeenth century with contributions from a number of individuals.
But the development of the art in that period is dominated by the name of Anton van Leeuwenhoek (1632-1723), who became most successful in the construction of instruments and in their use for observing a wide variety of objects in a scientific manner. In the latter part of the seventeenth century he observed bacteria, blood cells, and the structure of muscle and nerve cells. After his death, microscopes seem to have been employed mainly by hobbyists for about one hundred years until the nineteenth century, when the work of Leyden on cells (1848), Pasteur on bacteria (1857). |
|
 |
Faire une suggestion
Affiner la recherche
