Saturday, June 27, 2009


It was Crick and Watson who worked out the structure of DNA in the 1950's, but its discovery was made nearly 100 years previously by a Swiss physician called Frederick Miescher.

The man who discovered DNA, Frederick Miescher, was a young physician who worked in the laboratory of physiological chemistry of eminent scientist Felix Hoppe-Seyler. At the time of the discovery he was in his 25th year and had not long graduated from his studies.
His research interest was focused on understanding the chemistry of the cell, because of his belief that it would help to solve the problems of tissue development.

The Discovery of DNA
Miescher discovered DNA in 1869 whilst studying pus-ridden bandages that were being sent to the laboratory by the local clinic. At this time the lab was working on the chemistry of body fluids, particularly blood. To that end the young physician was studying lymphocytes, though these were hard to obtain. So he was isolating leukocytes (which were thought to be derived from lymphocytes) from pus. Once these cells were prepared he managed to isolate pure nuclei, and from there he extracted a high-phosphorus containing substance, and described it.

The man who discovered DNA did not know that it was the hereditary material and he also did not call it DNA. He referred to it as 'nuclein' because it had come from the nucleus. He expected it to be present in organs such as the liver and kidney, and he also believed it to be an acid. He wrote to his uncle, "With experiments using other tissues, it seems probable to me that a whole family of such slightly varying phosphourous-containing substances will appear, as a group of nucleins, equivalent to the proteins." Thus he had discovered nucleic acid, but it was two years before his work was published because his laboratory head wanted to replicate the results.

So Miescher had shown that the material inside the nucleus was different from the material inside the cell cytoplasm, and indeed was not present there. This was an unconventional view at the time because scientists would have expected the same material i.e. protein to be present throughout the cell.

Miescher also managed to chracterise the chemical components of this 'nuclein' acid - although not with the familiar names of bases that we're used to. He identified the components as N, C, H, O and P.
The man who discovered DNA also worked with salmon cells and managed to isolate nuclein from salmon spermatozoa. Again he did not really know what this material was for. The discovery of its true nature came many years later and by other scientists.

Tuesday, June 9, 2009


A banana split is an ice cream-based dessert. In its classic form it is served in a long dish called a "boat". It was reportedly invented in 1904 by David E. Strickler a 1906 graduate of the University of Pittsburgh. A banana is cut in two lengthwise (hence the split) and laid in the dish. Variations abound, but the classic banana split is made with scoops of vanilla, chocolate and strawberry ice cream served in a row on the split banana. Pineapple topping is spooned over the vanilla ice cream, chocolate syrup over the chocolate ice cream and strawberries over the strawberry ice cream.

Tuesday, June 2, 2009


The more you work, the more the hamster sweats! No one should do without this new invention. You can spend all day watch an artificial hamster run as the wheelk goes roung and round. There is only one small trick to all this. the wheel only spins IF you are typing and the faster you type, the faster it spins. as we haven´t tried it , we can´t tell if the hamster goes flying from the wheel if the speed increases but that could be a great final some people think. I for one think that would be very sad.
Mientras más trabajes más sudará el hámster.¡Por supuesto que sí! A nada le puede faltar este último resultado de la tecnología actual. Con esta rueda de hámster puedes pasarte todo el día mirando como un animalejo artificial corre sobre una rueda. Pero tiene un truco. La rueda no gira por sí sola, sino que gira dependiendo de qué tan rápido escribas en el teclado. Eso quiere decir que mientras más rápido escribas, más rápido correrá el animalito. Como no lo hemos probado no sabemos si al final el hámster sale volando, pero sería un gran final creen unas personas. Pero no estoy de acuerdo con eso.

Monday, June 1, 2009


THANKO Co. seem to have no end for their creativity. In this case, they have thought up how to deal with sweaty hands working on a computer. The Cooler Keyboard has three tiny ventilators which given air to the hands causing them to remain dry from perspiration.The ventilators work with the help of an additional USB Cable and it can be yours for 62 dollars or 39.51 Euros.

La gente de Thanko no para y su creatividad parece no conocer límites. En este caso aportan una solución a las sudorosas manos consecuencia de las temperaturas estivales. El teclado Cooler Keyboard incorpora tres pequeños ventiladores que airen la base de nuestras manos de forma que secan convenientemente el sudor de nuestras manos. Los ventiladores son alimentados vía un cable adicional USB. Puede ser tuyo por 62 dólares (39,51 euros).