Las tablas periódicas más frikis
Chemistry

Des chercheurs Américains et en Chinois viennent de faire de sérieux progrès vers la production relativement simple et peu coûteuse de «tissus intelligents», des textiles électroniques capables de détecter les maladies, surveiller le rythme cardiaque ainsi que d'autres signes vitaux. Les résultats de cette recherche digne d’un roman de science-fiction publié dans le magazine scientifique ACS' Nano Letters de décembre. Dans cette étonnante étude, Nicholas A. Kotov de l’Université du Michigan et Chuanlai Xu de l’Université Jiangnan, soulignent que les textiles électroniques, ou «e-textiles», sont déjà une réalité. Toutefois, ceux qui existent actuellement sont volumineux, rigides et complexes si bien qu’ils ne sont pas du tout pratiques. Les fabricants de textiles ont besoin de matériaux à la fois simples et souples pour être en mesure de fabriquer des fibres intelligentes utilisables pour des applications futures. Canoë - Techno-Sciences - Des vêtements intelligents pour détecter les maladies Canoë - Techno-Sciences - Des vêtements intelligents pour détecter les maladies
Chemistry

What is the full chemical name for titin What is the full chemical name for titin Titin, also known as connectin, (UniProt name: Q10466_HUMAN; accession number: Q10466) is a protein that is important in the contraction of striated muscle tissues. Titin connects the Z line to the M line in the sarcomere. The protein limits the range of motion of the sarcomere in tension, thus contributing to the passive stiffness of muscle. Variations in the sequence of titin between different types of muscle (e.g. cardiac or skeletal) has been correlated with differences in the mechanical properties of the muscles.[1] Titin is the largest known protein, consisting of 26,926 amino acids. The molecular weight of the mature protein is approximately 2,993,451.39 Da, and it has a theoretical pI of 6.35 [1].
Chemistry

Alchimie Alchemy

Coloured alchemical emblems Over the past ten years or so I have been making handcoloured emblems by painting with watercolours copies of woodcuts and engravings from printed books and some manuscript drawings. In colouring these I made use of my intensive study of the original coloured manuscripts of the 15th to 18th centuries, which have been the main focus of my research over the past years. I have often found that by contemplating and meditating on these handcoloured images one can resonate with and enter into the complex symbolic world of alchemy. I regret that I can only supply these images as these small thumbnails on this internet web site. Earlier in 1999 I did place full page images on this site, but some people just took these without my permission and used them in their own web sites and in other projects. One person in particular even claimed he had copyright over an image that I painted and is still hanging on my kitchen wall ! Coloured alchemical emblems
Chemistry

Chem & Phy

Chemistry

I know what the periodic table looks like, but where did it come from? Whose idea was it to arrange the elements this way? He set them out in order of atomic weight, and then grouped them into rows and columns based on their chemical and physical properties. 1869...that's way before the Schrödinger model, or even the Rutherford model. That's right. Mendeleev had no idea what atoms were made of or why they behaved as they did. Origin of the Periodic Table Origin of the Periodic Table
WebElements Periodic Table of the Elements The periodic table is a table of the chemical elements in which the elements are arranged by order of atomic number in such a way that the periodic properties (chemical periodicity) of the elements are made clear. The standard form of the table includes periods (usually horizontal in the periodic table) and groups (usually vertical). Elements in groups have some similar properties to each other. There is no one single or best structure for the periodic table but by whatever consensus there is, the form used here is very useful.

WebElements Periodic Table of the Elements

The Periodic Table of Videos

The Periodic Table of Videos Tables charting the chemical elements have been around since the 19th century - but this modern version has a short video about each one. We've done all 118 - but our job's not finished. Now we're updating all the videos with new stories, better samples and bigger experiments. Plus we're making films about other areas of chemistry, latest news and occasional adventures away from the lab. We've also started a new series - The Molecular Videos - featuring our favourite molecules and compounds.
practical chem.

Chemistry

Origin of the Periodic Table