After the hexane has cracked, the temperature is lowered. The cracked particles stick to the sides of the test tube, and the tube is placed back into the furnace. The alkenes and alkanes then move to the top of the test tube, and are allowed to cool. After a short time, the hexane vaporises again, and the cycle is repeated.
Cracking is also used for distillation of crude oil and other crude petroleum products, as a step in the refining of crude oils and even for the production of diesel fuel. The higher-end products from cracking are diesel fuel, dimethyl ether, which are used as fuel for electric power generation, but also for the production of ammonia and methanol.
The decomposition reaction is similar in its nature to the cracking process. The products formed are very different in type and molecular weight, and the products depend upon the alkane, the conditions and the catalyst.
The cracked particles are cooled and the product is collected in a flask. The flask is placed in a vacuum pump and the gas is vented. The flask is then heated and vented again, and this process is repeated over and over until the product is gone.
In addition to the above, MSE will offer the following security enhancements:
Real time protection: The new antivirus engine is based on signature-less technology, but is said to be highly optimized.
Sandbox protection: Windows Security Essentials includes the Heap Protection feature, which allows it to quarantine the memory of any process or program that shows suspicious activity.
Behavior monitoring: Microsoft Security Essentials will monitor changes made by applications and changes made by hackers and show problems.
Protection from phishing: MSE will use a dual-level system to detect phishing attacks, be they email and web-based.
Updates: Microsoft Security Essentials will be updated regularly for new malware, and the protection it offers will be updated daily.
The beta version of MSE comes as a download utility for Windows XP, Vista, Windows 7 and Windows Server 2003 and 2008, but not for Windows ME, 2000 and Windows 2000. It seems Microsoft is serious about not having a security product for those operating systems (unless of course they want to sell them an add-on).
Some applications, such as Java, require that the application directories and libraries are updated to a newer version before the user can update. However, there are some applications that are not explicitly API-specific, such as the X Window System, the X server source code, are automatically updated as required.
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