Insights into cell membranes via dish detergent - Ethan. Ethan O.
Perlstein focuses "on the intersection of cell biology, personalized medicine and quantitative evolutionary theory – a cross-disciplinary perspective I call evolutionary pharmacology. "Agnes Luise Wilhelmine Pockels was a German pioneer in chemistry. Irving Langmuir (1881–1957) and Katharine Burr Blodgett (1898–1979), research pioneers for the General Electric Company (GE), enjoyed one of the most fruitful relationships between a mentor and a younger scientist of all time. Among their many accomplishments, they were able to create and study films, or coatings, that were just one molecule thick.The transport of gaseous compounds across biological membranes is essential in all forms of life. Although it was generally accepted that gases freely penetrate the lipid matrix of biological membranes, a number of studies challenged this doctrine as they found biological membranes to have extremely low gas-permeability values.
Immuno-Oncology › Looking inside life. The relationship between immune system and cancer is elaborated and dynamic.
Immunotherapy has been acquiring big visibility in recent years and even more in the last months thanks to the 2018 Nobel Prize for medicine (read here). Immunotherapy involves re-engineering T-cells so that they can recognize and kill cancer cells. This type of therapy has shown promising preliminary results in fighting lymphoma. Microscopy is the elected method to study immune cells interactions and their potential for cancer healing. However, technologies that are available nowadays mainly rely on fluorescence, and fragile primary immune cells are heavily perturbed and eventually killed by staining procedures and phototoxicity. The research on immune-oncology will greatly benefit from a high-resolution, label-free approach allowing to image immune cells interplays in a marker-free, non-invasive way. Qu'est-ce qu'une cellule ?
Globules rouges. Différents types de microscopie et ordres de grandeur des tailles de différentes cellules (+ virus). Le Monde Cellulaire.
Microbiologie. Echelle_vivant3-anglais-francais3. Cell Size and Scale. Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long.
That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny. Smaller cells are easily visible under a light microscope. It's even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts. To see anything smaller than 500 nm, you will need an electron microscope. Adenine The label on the nucleotide is not quite accurate. How can an X chromosome be nearly as big as the head of the sperm cell? No, this isn't a mistake. The X chromosome is shown here in a condensed state, as it would appear in a cell that's going through mitosis.
A chromosome is made up of genetic material (one long piece of DNA) wrapped around structural support proteins (histones). Carbon. Zoom sur le vivant. BioVisions. David Bolinsky anime une cellule. La Cellule Animale.
Cell vs. virus: A battle for health - Shannon Stiles. La chimie du vieillissement. Sciences : Les cellules biologiques font la course. Cette «compétition» a pour but de mieux comprendre comment se déplacent les cellules cancéreuses, immunitaires ou autres. Pour cette première compétition mondiale, les organisateurs ont été très fermes : «Aucun dopage chimique n'est autorisé.» En revanche, les mutations génétiques le sont, et même encouragées ! Les coureurs n'auront ni maillots ni dossards, et pour cause, ce sont de simples cellules biologiques, uniquement visibles au microscope. «L'idée d'une course mondiale de cellules a été imaginée par deux de mes collègues, Manuel Théry et Matthieu Piel, autour d'un verre après un congrès scientifique», raconte Ana-Maria Lennon, l'une des organisatrices de l'épreuve et biologiste à l'Institut Curie (Paris).
Au-delà de l'aspect amusant et éducatif de la compétition, que revendiquent les organisateurs, la mobilité des cellules est un sujet d'étude très sérieux qui mobilise de très nombreux chercheurs. Récompenses VIDÉO - Un leucocyte (globule blanc) poursuivant une bactérie : Index Biologie cellulaire animée. How do cancer cells behave differently from healthy ones? [VIDEO]