Notepad Corner

In scanning electron microscopy (SEM), a beam of electrons scans the surface of a specimen, providing detailed, magnified images. This is different to optical microscopy , which involves viewing objects through a magnified lens using visible light. Electron microscopy has certain advantages over optical microscopy. How Do Electron Microscopes Work? Using electron beams, an electron microscope can give a very high quality of imaging, as an advanced means of sample analysis. In SEM, an electron gun fires an electron beam which is focussed through a series of lenses and apertures on the microscope. When these beams hit the sample, they interact with atoms on its surface, emitting secondary electrons, backscattered electrons, and x-rays. The microscope has built-in detectors that pick up these signals, using them to create high-resolution images and provide information on the composition of the specimen. The SEM operates under vacuum conditions, which prevents atoms or mo...

Centuries ago people were categorized by judging the amount of land owned and worked on. Back then there were only horses and bulls available to track carriages, ensuring transport in both urban areas and farms. Ever since the industrialization period, things have changes and evolution has taken place. Machinery slowly but surely replaced the work done by humans. With regards to transport, engines started being produced and proved to be more powerful and effective than the animal’s strength. Nowadays, technology is present in every aspect of our life. Horses are no longer used to move things from one place to another on the premises of a farm. Tractors are in charge of that and when needed, trailers are attached to these machines so that various objects or maybe even livestock can be easily moved from point A to B.   Special types of trailers have been developed for the safe transportation of farm animals. Livestock trailers for pigs and sheep are produced using high r...