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ULTRASTRUCTURE [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2010-03-15

English

Subject field(s)
  • Endocrine System and Metabolism
CONT

Amyloidosis is not one clinical entity but a group of diverse structurally driven protein deposition diseases. They are similar in that protein deposition occurs extracellularly and these deposits stain eosinophilic using standard tissue histologic stains, bind Congo red dye, and emit an apple-green birefringence using polarized light microscopy; exhibit metachromasia with crystal violet; and have an array of 75- to 100-Å nonbranching fibrils by electron microscopy and a twisted b-pleated sheet antiparallel configuration by x-ray crystallography. They differ, however, in the biochemical nature of the proteinaceous deposits, the "etiology" of the associated diseases (neoplastic, inflammatory, degenerative, hereditary), the tropism of protein deposition, and the spectrum of disease manifestations.

French

Domaine(s)
  • Systèmes endocrinien et métabolique
DEF

Affection caractérisée par le dépôt, dans de nombreux organes, d’un matériel d’allure protéique, la substance amyloïde définie par certaines affinités tinctoriales et une ultrastructure fibrillaire et tendant à envahir et détruire certains organes, notamment les reins.

Spanish

Campo(s) temático(s)
  • Sistemas endocrino y metabólico
DEF

Enfermedad caracterizada por la aparición de formaciones de pequeños fragmentos de una proteína insoluble en distintas partes del cuerpo, tales como lengua, corazón, tracto gastrointestinal, nervios, músculos y especialmente en los dedos de la mano.

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Record 2 1995-04-20

English

Subject field(s)
  • Cytology
CONT

Ultrastructural studies have contributed enormously to our knowledge of molecular biology.

French

Domaine(s)
  • Cytologie
DEF

Relatif à la structure d’une cellule telle qu’elle apparaît au microscope électronique.

OBS

Voir également ultrastructure.

Spanish

Campo(s) temático(s)
  • Citología
Save record 2

Record 3 1977-12-20

English

Subject field(s)
  • Histology
  • Cryogenics
CONT

The observation of pigments in their natural state was facilitated by the development and use of cryofixation which permits direct examination of cellular contents in a frozen state without previous treatment by fixatives and stains.

French

Domaine(s)
  • Histologie
  • Cryogénie
DEF

Opération qui consiste à utiliser des procédés cryogéniques pour fixer la morphologie et la structure de cellules ou d’êtres vivants.

CONT

On peut considérer que l'état d’avancement de ces connaissances dans l'ultrastructure membranaire est la conséquence de l'amélioration de préparation des objets et surtout l'application des méthodes physiques de stabilisation des objets : cryofixation, cryodécapage, cryo-ultra-microtomie.

Spanish

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Record 4 1975-03-11

English

Subject field(s)
  • Morphology and General Physiology
  • Microbiology and Parasitology
OBS

it was not until the 1950's when the unit membrane concept was developed that measurements were based upon electron microscopic studies of myelin sheaths.

French

Domaine(s)
  • Morphologie et physiologie générale
  • Microbiologie et parasitologie
OBS

pour marquer le caractère très général de l'ultrastructure des membranes, on parle de "membrane unitaire".

Spanish

Save record 4

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